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{
    "id": 64262,
    "url": "http://patches.dpdk.org/api/patches/64262/?format=api",
    "web_url": "http://patches.dpdk.org/project/dpdk/patch/20200107091343.22965-1-david.hunt@intel.com/",
    "project": {
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        "name": "DPDK",
        "link_name": "dpdk",
        "list_id": "dev.dpdk.org",
        "list_email": "dev@dpdk.org",
        "web_url": "http://core.dpdk.org",
        "scm_url": "git://dpdk.org/dpdk",
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    "msgid": "<20200107091343.22965-1-david.hunt@intel.com>",
    "list_archive_url": "https://inbox.dpdk.org/dev/20200107091343.22965-1-david.hunt@intel.com",
    "date": "2020-01-07T09:13:43",
    "name": "[v1] doc: rework vm power manager user guide",
    "commit_ref": null,
    "pull_url": null,
    "state": "superseded",
    "archived": true,
    "hash": "4b0a95cdd8a73feb955fb8eb33ea90ef1b1075c7",
    "submitter": {
        "id": 342,
        "url": "http://patches.dpdk.org/api/people/342/?format=api",
        "name": "Hunt, David",
        "email": "david.hunt@intel.com"
    },
    "delegate": {
        "id": 1,
        "url": "http://patches.dpdk.org/api/users/1/?format=api",
        "username": "tmonjalo",
        "first_name": "Thomas",
        "last_name": "Monjalon",
        "email": "thomas@monjalon.net"
    },
    "mbox": "http://patches.dpdk.org/project/dpdk/patch/20200107091343.22965-1-david.hunt@intel.com/mbox/",
    "series": [
        {
            "id": 8001,
            "url": "http://patches.dpdk.org/api/series/8001/?format=api",
            "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=8001",
            "date": "2020-01-07T09:13:43",
            "name": "[v1] doc: rework vm power manager user guide",
            "version": 1,
            "mbox": "http://patches.dpdk.org/series/8001/mbox/"
        }
    ],
    "comments": "http://patches.dpdk.org/api/patches/64262/comments/",
    "check": "success",
    "checks": "http://patches.dpdk.org/api/patches/64262/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "Return-Path": "<dev-bounces@dpdk.org>",
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        "Received": [
            "from dpdk.org (dpdk.org [92.243.14.124])\n\tby inbox.dpdk.org (Postfix) with ESMTP id 69554A04F6;\n\tTue,  7 Jan 2020 10:14:15 +0100 (CET)",
            "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id AF6B91D646;\n\tTue,  7 Jan 2020 10:14:14 +0100 (CET)",
            "from mga14.intel.com (mga14.intel.com [192.55.52.115])\n by dpdk.org (Postfix) with ESMTP id 4513B1C11F\n for <dev@dpdk.org>; Tue,  7 Jan 2020 10:14:12 +0100 (CET)",
            "from orsmga003.jf.intel.com ([10.7.209.27])\n by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384;\n 07 Jan 2020 01:14:09 -0800",
            "from silpixa00399952.ir.intel.com (HELO\n silpixa00399952.ger.corp.intel.com) ([10.237.222.38])\n by orsmga003.jf.intel.com with ESMTP; 07 Jan 2020 01:14:05 -0800"
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        "From": "David Hunt <david.hunt@intel.com>",
        "To": "dev@dpdk.org",
        "Cc": "john.mcnamara@intel.com, marko.kovacevic@intel.com,\n David Hunt <david.hunt@intel.com>",
        "Date": "Tue,  7 Jan 2020 09:13:43 +0000",
        "Message-Id": "<20200107091343.22965-1-david.hunt@intel.com>",
        "X-Mailer": "git-send-email 2.17.1",
        "MIME-Version": "1.0",
        "Content-Type": "text/plain; charset=UTF-8",
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        "Subject": "[dpdk-dev] [PATCH v1] doc: rework vm power manager user guide",
        "X-BeenThere": "dev@dpdk.org",
        "X-Mailman-Version": "2.1.15",
        "Precedence": "list",
        "List-Id": "DPDK patches and discussions <dev.dpdk.org>",
        "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n <mailto:dev-request@dpdk.org?subject=unsubscribe>",
        "List-Archive": "<http://mails.dpdk.org/archives/dev/>",
        "List-Post": "<mailto:dev@dpdk.org>",
        "List-Help": "<mailto:dev-request@dpdk.org?subject=help>",
        "List-Subscribe": "<https://mails.dpdk.org/listinfo/dev>,\n <mailto:dev-request@dpdk.org?subject=subscribe>",
        "Errors-To": "dev-bounces@dpdk.org",
        "Sender": "\"dev\" <dev-bounces@dpdk.org>"
    },
    "content": "Review and re-work of vm_power_manager documentation. Hopefully this\nis clearer, easier to follow.\n\nSigned-off-by: David Hunt <david.hunt@intel.com>\n---\n .../img/vm_power_mgr_highlevel.svg            | 2189 +++++++++++------\n .../img/vm_power_mgr_vm_request_seq.svg       | 1455 +++++------\n .../sample_app_ug/vm_power_management.rst     | 1194 +++++----\n 3 files changed, 2775 insertions(+), 2063 deletions(-)",
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transform=\"translate(245.072,-298.953)\">\n-\t\t\t<title>Box.33</title>\n-\t\t\t<desc>VM 1</desc>\n-\t\t\t<g id=\"shadow33-199\" transform=\"matrix(1,0,0,1,1.44,1.44)\" class=\"st1\">\n-\t\t\t\t<rect x=\"0\" y=\"317.253\" width=\"99.2126\" height=\"141.732\" class=\"st2\"/>\n-\t\t\t</g>\n-\t\t\t<rect x=\"0\" y=\"317.253\" width=\"99.2126\" height=\"141.732\" class=\"st3\"/>\n-\t\t\t<text x=\"40.27\" y=\"414.52\" class=\"st11\">VM 1</text>\t\t</g>\n-\t\t<g id=\"shape34-204\" transform=\"translate(245.072,-298.953)\">\n-\t\t\t<title>Box.34</title>\n-\t\t\t<desc>Virtual Core 0</desc>\n-\t\t\t<g id=\"shadow34-205\" transform=\"matrix(1,0,0,1,1.44,1.44)\" class=\"st1\">\n-\t\t\t\t<rect x=\"0\" y=\"422.843\" width=\"48.189\" height=\"36.1417\" class=\"st2\"/>\n-\t\t\t</g>\n-\t\t\t<rect x=\"0\" y=\"422.843\" width=\"48.189\" height=\"36.1417\" class=\"st12\"/>\n-\t\t\t<text x=\"12.76\" y=\"438.51\" class=\"st13\">Virtual <tspan x=\"12.09\" dy=\"1.2em\" class=\"st14\">Core 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class=\"st18\">provides a new implementation that </tspan><tspan x=\"22\" dy=\"1.2em\" class=\"st18\">forwards frequency set requests to host </tspan><tspan\n-\t\t\t\t\t\tx=\"22\" dy=\"1.2em\" class=\"st18\">via Virtio</tspan><tspan class=\"st18\">-</tspan><tspan class=\"st18\">Serial channel </tspan><tspan\n-\t\t\t\t\t\tx=\"4\" dy=\"1.212em\" class=\"st17\">·</tspan><tspan class=\"st17\"> </tspan><tspan class=\"st18\">Each lcore has exclusive access to a </tspan><tspan\n-\t\t\t\t\t\tx=\"22\" dy=\"1.204em\" class=\"st18\">single channel </tspan><tspan x=\"4\" dy=\"1.212em\" class=\"st17\">·</tspan><tspan\n-\t\t\t\t\t\tclass=\"st17\"> </tspan><tspan class=\"st18\">Sample application re</tspan><tspan class=\"st18\">-</tspan><tspan\n-\t\t\t\t\t\tclass=\"st18\">uses </tspan>l3fwd_power <tspan x=\"4\" dy=\"1.216em\" class=\"st17\">·</tspan><tspan class=\"st17\"> </tspan><tspan\n-\t\t\t\t\t\tclass=\"st18\">A CLI for changing frequency from within </tspan><tspan x=\"22\" dy=\"1.204em\" 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class=\"st8\"/>\n-\t\t\t</g>\n-\t\t\t<g id=\"shape39-265\">\n-\t\t\t\t<title>Sheet.39</title>\n-\t\t\t\t<g id=\"shadow39-266\" transform=\"matrix(1,0,0,1,1.61661,-1.23846)\" class=\"st1\">\n-\t\t\t\t\t<path d=\"M2.83 456.15 L211.63 456.15 A1.41732 1.41732 0 0 1 213.05 457.57 L213.05 457.57 a0.334585 0.334585 -180\n-\t\t\t\t\t\t\t\t 0 0 0.633846 0.149631 L214.47 456.15 A6.33846 6.33846 -180 0 0 214.47 450.48 L213.68 448.91 a0.334585\n-\t\t\t\t\t\t\t\t 0.334585 -180 0 0 -0.633846 0.149631 L213.05 449.06 A1.41732 1.41732 0 0 1 211.63 450.48 L2.83 450.48\n-\t\t\t\t\t\t\t\t A2.83465 2.83465 -180 0 0 0 453.32 L0 453.32 A2.83465 2.83465 -180 0 0 2.83 456.15\" class=\"st6\"/>\n-\t\t\t\t</g>\n-\t\t\t\t<path d=\"M2.83 456.15 L211.63 456.15 A1.41732 1.41732 0 0 1 213.05 457.57 L213.05 457.57 a0.334585 0.334585 -180\n-\t\t\t\t\t\t\t 0 0 0.633846 0.149631 L214.47 456.15 A6.33846 6.33846 -180 0 0 214.47 450.48 L213.68 448.91 a0.334585\n-\t\t\t\t\t\t\t 0.334585 -180 0 0 -0.633846 0.149631 L213.05 449.06 A1.41732 1.41732 0 0 1 211.63 450.48 L2.83 450.48\n-\t\t\t\t\t\t\t A2.83465 2.83465 -180 0 0 0 453.32 L0 453.32 A2.83465 2.83465 -180 0 0 2.83 456.15\" class=\"st8\"/>\n-\t\t\t</g>\n-\t\t\t<g id=\"shape40-272\" transform=\"translate(-2.76812,-2.88265)\">\n-\t\t\t\t<title>Sheet.40</title>\n-\t\t\t\t<g id=\"shadow40-273\" transform=\"matrix(1,0,0,1,1.61661,-1.23846)\" class=\"st1\">\n-\t\t\t\t\t<rect x=\"0\" y=\"453.412\" width=\"1.21855\" height=\"5.57329\" rx=\"0.609275\" ry=\"0.609275\" class=\"st9\"/>\n-\t\t\t\t</g>\n-\t\t\t\t<rect x=\"0\" y=\"453.412\" width=\"1.21855\" height=\"5.57329\" rx=\"0.609275\" ry=\"0.609275\" class=\"st10\"/>\n-\t\t\t</g>\n-\t\t</g>\n-\t\t<g id=\"shape15-277\" transform=\"translate(18.3,-99.8187)\">\n-\t\t\t<title>Box.15</title>\n-\t\t\t<desc>OS/Hypervisor</desc>\n-\t\t\t<g id=\"shadow15-278\" transform=\"matrix(1,0,0,1,1.44,1.44)\" class=\"st1\">\n-\t\t\t\t<rect x=\"0\" y=\"319.379\" width=\"405.354\" height=\"139.606\" class=\"st2\"/>\n-\t\t\t</g>\n-\t\t\t<rect x=\"0\" y=\"319.379\" width=\"405.354\" height=\"139.606\" class=\"st19\"/>\n-\t\t\t<text x=\"174.89\" y=\"452.58\" class=\"st11\">OS/Hypervisor</text>\t\t</g>\n-\t\t<g id=\"shape55-284\" transform=\"translate(237.985,-159.346)\">\n-\t\t\t<title>Box.55</title>\n-\t\t\t<desc>Linux “userspace” power governor /sys/devices/system/cpu/cpuN...</desc>\n-\t\t\t<g id=\"shadow55-285\" transform=\"matrix(1,0,0,1,1.44,1.44)\" class=\"st1\">\n-\t\t\t\t<rect x=\"0\" y=\"430.638\" width=\"167.244\" height=\"28.3465\" class=\"st2\"/>\n-\t\t\t</g>\n-\t\t\t<rect x=\"0\" y=\"430.638\" width=\"167.244\" height=\"28.3465\" class=\"st19\"/>\n-\t\t\t<text x=\"16.72\" y=\"441.84\" class=\"st11\">Linux “userspace” power governor <tspan x=\"8.93\" dy=\"1.2em\" class=\"st14\">/</tspan>sys/devices/system/cpu/cpuN/cpufreq/</text>\t\t</g>\n-\t\t<g id=\"shape45-291\" transform=\"translate(429.324,-60.1337)\">\n-\t\t\t<title>Box.45</title>\n-\t\t\t<desc>VM Power Monitor Accepts VM Commands over Virtio Serial endpo...</desc>\n-\t\t\t<g id=\"shadow45-292\" transform=\"matrix(1,0,0,1,1.44,1.44)\" class=\"st1\">\n-\t\t\t\t<rect x=\"0\" y=\"254.89\" width=\"130.519\" height=\"204.094\" class=\"st2\"/>\n-\t\t\t</g>\n-\t\t\t<rect x=\"0\" y=\"254.89\" width=\"130.519\" height=\"204.094\" class=\"st16\"/>\n-\t\t\t<text x=\"4\" y=\"266.09\" class=\"st11\">VM Power Monitor <tspan x=\"4\" dy=\"1.212em\" class=\"st17\">·</tspan><tspan\n-\t\t\t\t\t\tclass=\"st17\"> </tspan><tspan class=\"st18\">Accepts VM Commands over </tspan><tspan x=\"22\" dy=\"1.204em\"\n-\t\t\t\t\t\tclass=\"st18\">Virtio Serial endpoints</tspan><tspan class=\"st18\">, </tspan><tspan x=\"22\" dy=\"1.2em\"\n-\t\t\t\t\t\tclass=\"st18\">monitored via </tspan>epoll <tspan x=\"4\" dy=\"1.212em\" class=\"st17\">·</tspan><tspan\n-\t\t\t\t\t\tclass=\"st17\"> </tspan><tspan class=\"st18\">Commands include the </tspan><tspan x=\"22\" dy=\"1.204em\"\n-\t\t\t\t\t\tclass=\"st18\">virtual core to be modified</tspan><tspan class=\"st18\">, </tspan><tspan x=\"22\" dy=\"1.2em\"\n-\t\t\t\t\t\tclass=\"st18\">using </tspan>libvirt <tspan class=\"st18\">to get physical </tspan><tspan x=\"22\" dy=\"1.2em\"\n-\t\t\t\t\t\tclass=\"st18\">core mapping </tspan><tspan x=\"4\" dy=\"1.212em\" class=\"st17\">·</tspan><tspan class=\"st17\"> </tspan><tspan\n-\t\t\t\t\t\tclass=\"st18\">Uses librte</tspan><tspan class=\"st18\">_</tspan><tspan class=\"st18\">power to affect </tspan><tspan\n-\t\t\t\t\t\tx=\"22\" dy=\"1.204em\" class=\"st18\">frequency changes via Linux </tspan><tspan x=\"22\" dy=\"1.2em\" class=\"st18\">userspace power </tspan><tspan\n-\t\t\t\t\t\tx=\"22\" dy=\"1.2em\" class=\"st18\">governor</tspan><tspan class=\"st18\">(</tspan><tspan class=\"st18\">APCI cpufreq</tspan><tspan\n-\t\t\t\t\t\tclass=\"st18\">) </tspan><tspan x=\"4\" dy=\"1.212em\" class=\"st17\">·</tspan><tspan class=\"st17\"> </tspan><tspan\n-\t\t\t\t\t\tclass=\"st18\">CLI</tspan><tspan class=\"st18\">: </tspan><tspan class=\"st18\">For adding VM channels </tspan><tspan\n-\t\t\t\t\t\tx=\"22\" dy=\"1.204em\" class=\"st18\">to monitor</tspan><tspan class=\"st18\">, </tspan><tspan class=\"st18\">inspecting and </tspan><tspan\n-\t\t\t\t\t\tx=\"22\" dy=\"1.2em\" class=\"st18\">changing channel state</tspan><tspan class=\"st18\">, </tspan><tspan x=\"22\"\n-\t\t\t\t\t\tdy=\"1.2em\" class=\"st18\">manually altering CPU </tspan><tspan x=\"22\" dy=\"1.2em\" class=\"st18\">frequency</tspan><tspan\n-\t\t\t\t\t\tclass=\"st18\">. </tspan><tspan class=\"st18\">Also allows for the </tspan><tspan x=\"22\" dy=\"1.2em\"\n-\t\t\t\t\t\tclass=\"st18\">changing of vCPU to pCPU </tspan><tspan x=\"22\" dy=\"1.2em\" class=\"st18\">pinning</tspan><tspan\n-\t\t\t\t\t\tclass=\"st18\">.</tspan></text>\t\t</g>\n-\t\t<g id=\"shape53-339\" transform=\"translate(26.8039,-116.827)\">\n-\t\t\t<title>Box.53</title>\n-\t\t\t<desc>VM Power Monitor Application</desc>\n-\t\t\t<g id=\"shadow53-340\" transform=\"matrix(1,0,0,1,1.44,1.44)\" class=\"st1\">\n-\t\t\t\t<rect x=\"0\" y=\"342.41\" width=\"150.236\" height=\"116.575\" class=\"st2\"/>\n-\t\t\t</g>\n-\t\t\t<rect x=\"0\" y=\"342.41\" width=\"150.236\" height=\"116.575\" class=\"st20\"/>\n-\t\t\t<text x=\"17.34\" y=\"452.58\" class=\"st11\">VM Power Monitor Application</text>\t\t</g>\n-\t\t<g id=\"shape61-346\" transform=\"translate(18.3,-396.394)\">\n-\t\t\t<title>Box.61</title>\n-\t\t\t<desc>librte_power(vm)</desc>\n-\t\t\t<g id=\"shadow61-347\" transform=\"matrix(1,0,0,1,1.44,1.44)\" class=\"st1\">\n-\t\t\t\t<rect x=\"0\" y=\"438.079\" width=\"201.26\" height=\"20.9055\" class=\"st2\"/>\n-\t\t\t</g>\n-\t\t\t<rect x=\"0\" y=\"438.079\" width=\"201.26\" height=\"20.9055\" class=\"st20\"/>\n-\t\t\t<text x=\"70.84\" y=\"450.93\" class=\"st13\">librte_power(vm)</text>\t\t</g>\n-\t\t<g id=\"shape48-352\" transform=\"translate(18.3,-366.275)\">\n-\t\t\t<title>Box.48</title>\n-\t\t\t<desc>lcore channel 0</desc>\n-\t\t\t<g id=\"shadow48-353\" transform=\"matrix(1,0,0,1,1.44,1.44)\" class=\"st1\">\n-\t\t\t\t<rect x=\"0\" y=\"428.867\" width=\"42.5197\" height=\"30.1181\" class=\"st2\"/>\n-\t\t\t</g>\n-\t\t\t<rect x=\"0\" y=\"428.867\" width=\"42.5197\" height=\"30.1181\" class=\"st21\"/>\n-\t\t\t<text x=\"11.7\" y=\"436.73\" class=\"st11\">lcore <tspan x=\"6.14\" dy=\"1.2em\" class=\"st14\">channel  </tspan><tspan x=\"19.04\"\n-\t\t\t\t\t\tdy=\"1.2em\" class=\"st14\">0</tspan></text>\t\t</g>\n-\t\t<g id=\"shape47-361\" transform=\"translate(245.072,-396.394)\">\n-\t\t\t<title>Box.47</title>\n-\t\t\t<desc>librte_power(vm)</desc>\n-\t\t\t<g id=\"shadow47-362\" transform=\"matrix(1,0,0,1,1.44,1.44)\" class=\"st1\">\n-\t\t\t\t<rect x=\"0\" y=\"438.079\" width=\"99.2126\" height=\"20.9055\" class=\"st2\"/>\n-\t\t\t</g>\n-\t\t\t<rect x=\"0\" y=\"438.079\" width=\"99.2126\" height=\"20.9055\" class=\"st20\"/>\n-\t\t\t<text x=\"19.82\" y=\"450.93\" class=\"st13\">librte_power(vm)</text>\t\t</g>\n-\t\t<g id=\"shape46-367\" transform=\"translate(72.1583,-366.275)\">\n-\t\t\t<title>Box.46</title>\n-\t\t\t<desc>lcore channel 1</desc>\n-\t\t\t<g id=\"shadow46-368\" transform=\"matrix(1,0,0,1,1.44,1.44)\" class=\"st1\">\n-\t\t\t\t<rect x=\"0\" y=\"428.867\" width=\"42.5197\" height=\"30.1181\" class=\"st2\"/>\n-\t\t\t</g>\n-\t\t\t<rect x=\"0\" y=\"428.867\" width=\"42.5197\" height=\"30.1181\" class=\"st21\"/>\n-\t\t\t<text x=\"11.7\" y=\"436.73\" class=\"st11\">lcore <tspan x=\"6.14\" dy=\"1.2em\" class=\"st14\">channel  </tspan><tspan x=\"19.04\"\n-\t\t\t\t\t\tdy=\"1.2em\" class=\"st14\">1</tspan></text>\t\t</g>\n-\t\t<g id=\"shape60-375\" transform=\"translate(126.017,-366.275)\">\n-\t\t\t<title>Box.60</title>\n-\t\t\t<desc>lcore channel 2</desc>\n-\t\t\t<g id=\"shadow60-376\" transform=\"matrix(1,0,0,1,1.44,1.44)\" class=\"st1\">\n-\t\t\t\t<rect x=\"0\" y=\"428.867\" width=\"42.5197\" height=\"30.1181\" class=\"st2\"/>\n-\t\t\t</g>\n-\t\t\t<rect x=\"0\" y=\"428.867\" width=\"42.5197\" height=\"30.1181\" class=\"st21\"/>\n-\t\t\t<text x=\"11.7\" y=\"436.73\" class=\"st11\">lcore <tspan x=\"6.14\" dy=\"1.2em\" class=\"st14\">channel  </tspan><tspan x=\"19.04\"\n-\t\t\t\t\t\tdy=\"1.2em\" class=\"st14\">2</tspan></text>\t\t</g>\n-\t\t<g id=\"shape62-383\" transform=\"translate(177.04,-366.275)\">\n-\t\t\t<title>Box.62</title>\n-\t\t\t<desc>lcore channel 3</desc>\n-\t\t\t<g id=\"shadow62-384\" transform=\"matrix(1,0,0,1,1.44,1.44)\" class=\"st1\">\n-\t\t\t\t<rect x=\"0\" y=\"428.867\" width=\"42.5197\" height=\"30.1181\" class=\"st2\"/>\n-\t\t\t</g>\n-\t\t\t<rect x=\"0\" y=\"428.867\" width=\"42.5197\" height=\"30.1181\" class=\"st21\"/>\n-\t\t\t<text x=\"11.7\" y=\"436.73\" class=\"st11\">lcore <tspan x=\"6.14\" dy=\"1.2em\" class=\"st14\">channel  </tspan><tspan x=\"19.04\"\n-\t\t\t\t\t\tdy=\"1.2em\" class=\"st14\">3</tspan></text>\t\t</g>\n-\t\t<g id=\"shape50-391\" transform=\"translate(245.072,-366.275)\">\n-\t\t\t<title>Box.50</title>\n-\t\t\t<desc>lcore channel 0</desc>\n-\t\t\t<g id=\"shadow50-392\" transform=\"matrix(1,0,0,1,1.44,1.44)\" class=\"st1\">\n-\t\t\t\t<rect x=\"0\" y=\"428.867\" width=\"42.5197\" height=\"30.1181\" class=\"st2\"/>\n-\t\t\t</g>\n-\t\t\t<rect x=\"0\" y=\"428.867\" width=\"42.5197\" height=\"30.1181\" class=\"st21\"/>\n-\t\t\t<text x=\"11.7\" y=\"436.73\" class=\"st11\">lcore <tspan x=\"6.14\" dy=\"1.2em\" class=\"st14\">channel  </tspan><tspan x=\"19.04\"\n-\t\t\t\t\t\tdy=\"1.2em\" class=\"st14\">0</tspan></text>\t\t</g>\n-\t\t<g id=\"shape52-399\" transform=\"translate(301.765,-366.275)\">\n-\t\t\t<title>Box.52</title>\n-\t\t\t<desc>lcore channel 1</desc>\n-\t\t\t<g id=\"shadow52-400\" transform=\"matrix(1,0,0,1,1.44,1.44)\" class=\"st1\">\n-\t\t\t\t<rect x=\"0\" y=\"428.867\" width=\"42.5197\" height=\"30.1181\" class=\"st2\"/>\n-\t\t\t</g>\n-\t\t\t<rect x=\"0\" y=\"428.867\" width=\"42.5197\" height=\"30.1181\" class=\"st21\"/>\n-\t\t\t<text x=\"11.7\" y=\"436.73\" class=\"st11\">lcore <tspan x=\"6.14\" dy=\"1.2em\" class=\"st14\">channel  </tspan><tspan x=\"19.04\"\n-\t\t\t\t\t\tdy=\"1.2em\" class=\"st14\">1</tspan></text>\t\t</g>\n-\t\t<g id=\"shape51-407\" transform=\"translate(26.8039,-216.039)\">\n-\t\t\t<title>Box.51</title>\n-\t\t\t<desc>Endpoint Monitor(lcore channels)</desc>\n-\t\t\t<g id=\"shadow51-408\" transform=\"matrix(1,0,0,1,1.44,1.44)\" class=\"st1\">\n-\t\t\t\t<rect x=\"0\" y=\"441.623\" width=\"141.732\" height=\"17.3622\" class=\"st2\"/>\n-\t\t\t</g>\n-\t\t\t<rect x=\"0\" y=\"441.623\" width=\"141.732\" height=\"17.3622\" class=\"st21\"/>\n-\t\t\t<text x=\"7.09\" y=\"452.82\" class=\"st11\">Endpoint Monitor(lcore channels)</text>\t\t</g>\n-\t\t<g id=\"shape25-413\" transform=\"translate(26.8039,-198.854)\">\n-\t\t\t<title>Box.25</title>\n-\t\t\t<desc>Channel Manager</desc>\n-\t\t\t<g id=\"shadow25-414\" transform=\"matrix(1,0,0,1,1.44,1.44)\" class=\"st1\">\n-\t\t\t\t<rect x=\"0\" y=\"441.623\" width=\"141.732\" height=\"17.3622\" class=\"st2\"/>\n-\t\t\t</g>\n-\t\t\t<rect 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style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;line-height:1;font-family:Arial;-inkscape-font-specification:Arial;text-align:center;text-anchor:middle;stroke-width:0.26458332\"\n+         id=\"tspan4609-6-8\">channel</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"99.297241\"\n+         y=\"188.20789\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;line-height:1;font-family:Arial;-inkscape-font-specification:Arial;text-align:center;text-anchor:middle;stroke-width:0.26458332\"\n+         id=\"tspan4593-02-4\">1</tspan></text>\n+    <text\n+       xml:space=\"preserve\"\n+       style=\"font-style:normal;font-weight:normal;font-size:2.82222223px;line-height:0;font-family:sans-serif;text-align:center;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332\"\n+       x=\"90.728218\"\n+       y=\"195.90175\"\n+       id=\"text4551-6-1-3-2-6\"><tspan\n+         sodipodi:role=\"line\"\n+         x=\"90.728218\"\n+         y=\"195.90175\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:2.82222223px;line-height:1;font-family:Arial;-inkscape-font-specification:'Arial Bold';text-align:center;text-anchor:middle;stroke-width:0.26458332\"\n+         id=\"tspan4593-6-6-6\">VM 1</tspan></text>\n+    <text\n+       xml:space=\"preserve\"\n+       style=\"font-style:normal;font-weight:normal;font-size:2.82222223px;line-height:1.25;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332\"\n+       x=\"79.098969\"\n+       y=\"177.21642\"\n+       id=\"text4551-6-6\"><tspan\n+         sodipodi:role=\"line\"\n+         id=\"tspan4549-8-7\"\n+         x=\"79.098969\"\n+         y=\"177.21642\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\">librte_power(vm)</tspan></text>\n+    <text\n+       xml:space=\"preserve\"\n+       style=\"font-style:normal;font-weight:normal;font-size:2.82222223px;line-height:1.25;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332\"\n+       x=\"78.780937\"\n+       y=\"170.79013\"\n+       id=\"text4551-2\"><tspan\n+         sodipodi:role=\"line\"\n+         id=\"tspan4549-0\"\n+         x=\"78.780937\"\n+         y=\"170.79013\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\">DPDK Application</tspan></text>\n+    <text\n+       xml:space=\"preserve\"\n+       style=\"font-style:normal;font-weight:normal;font-size:2.82222223px;line-height:1.25;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332\"\n+       x=\"115.35013\"\n+       y=\"169.63728\"\n+       id=\"text4551-2-6\"><tspan\n+         sodipodi:role=\"line\"\n+         id=\"tspan4549-0-7\"\n+         x=\"115.35013\"\n+         y=\"169.63728\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:'Arial Bold';stroke-width:0.26458332\">DPDK VM Application</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"115.35013\"\n+         y=\"173.19772\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan4984\"> • Reuse <tspan\n+   style=\"font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-family:Arial;-inkscape-font-specification:'Arial Bold'\"\n+   id=\"tspan13541\">librte_power</tspan> interface, but</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"115.35013\"\n+         y=\"176.75818\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan4986\">   provides a new implementation that </tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"115.35013\"\n+         y=\"180.31862\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan4988\">   forwards frequency set requests to the</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"115.35013\"\n+         y=\"183.87907\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan4990\">   host using a Virtio-Serial channel</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"115.35013\"\n+         y=\"187.43951\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan4992\"> • Each lcore has exclusive access to a</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"115.35013\"\n+         y=\"190.99997\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan4994\">   single channel </tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"115.35013\"\n+         y=\"194.56041\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan4996\"> • Sample application reuses <tspan\n+   style=\"font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-family:Arial;-inkscape-font-specification:'Arial Bold'\"\n+   id=\"tspan13543\">l3fwd_power</tspan></tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"115.35013\"\n+         y=\"198.12086\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan4998\"> • A CLI for changing frequency from within</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"115.35013\"\n+         y=\"201.6813\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan5000\">   a VM is also included.</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"115.35013\"\n+         y=\"205.24176\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan4982\" /></text>\n+    <rect\n+       style=\"opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:0.35572669;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1\"\n+       id=\"rect5002\"\n+       width=\"56.211514\"\n+       height=\"37.133213\"\n+       x=\"114.32124\"\n+       y=\"165.99869\" />\n+    <text\n+       xml:space=\"preserve\"\n+       style=\"font-style:normal;font-weight:normal;font-size:2.82222223px;line-height:1.25;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332\"\n+       x=\"135.61612\"\n+       y=\"229.79572\"\n+       id=\"text4551-2-6-2\"><tspan\n+         sodipodi:role=\"line\"\n+         id=\"tspan4549-0-7-8\"\n+         x=\"135.61612\"\n+         y=\"229.79572\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:'Arial Bold';stroke-width:0.26458332\">VM Power Monitor</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"233.35616\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan4990-0\"> • Accepts VM commands over</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"236.91661\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan5061\">   Virtio Serial endpoints, </tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"240.47705\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan5063\">   monitored using <tspan\n+   style=\"font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-family:Arial;-inkscape-font-specification:'Arial Bold'\"\n+   id=\"tspan13545\">epoll</tspan>.</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"244.03751\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan4992-3\"> • Commands include the</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"247.59795\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan4994-5\">   virutal core to be modified,</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"251.1584\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan5065\">   using <tspan\n+   style=\"font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-family:Arial;-inkscape-font-specification:'Arial Bold'\"\n+   id=\"tspan13547\">libvirt</tspan> to get the physical</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"254.71884\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan5067\">   core mapping. </tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"258.2793\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan4996-5\"> • Uses librte_power to affect</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"261.83975\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan5069\">   frequency changes using </tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"265.40018\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan5071\">   Linux userspace power</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"268.96063\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan5073\">   governor (APCI cpufreq).</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"272.52109\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan4998-6\"> • CLI: For adding VM channels</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"276.08154\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan5000-7\">   to monitor, inspecting and </tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"279.64197\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan5075\">   changing channel state,</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"283.20242\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan5077\">   manually altering CPU</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"286.76288\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan5079\">   frequency. Also allows for the</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"290.32333\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan5081\">   changing of vCPU to pCPU </tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"293.88376\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222223px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\"\n+         id=\"tspan5083\">   pinning.</tspan><tspan\n+         sodipodi:role=\"line\"\n+         x=\"135.61612\"\n+         y=\"297.44421\"\n+         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style=\"font-style:normal;font-weight:normal;font-size:10.58333302px;line-height:1.25;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.26458332\"\n+       x=\"6.5029726\"\n+       y=\"281.56589\"\n+       id=\"text5313\"><tspan\n+         sodipodi:role=\"line\"\n+         id=\"tspan5311\"\n+         x=\"6.5029726\"\n+         y=\"281.56589\"\n+         style=\"font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.17499995px;font-family:Arial;-inkscape-font-specification:Arial;stroke-width:0.26458332\">Core 0</tspan></text>\n+    <rect\n+       style=\"opacity:0.97000002;fill:#b2c5dc;fill-opacity:1;stroke:#000000;stroke-width:0.35277778;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1\"\n+       id=\"rect5309-9\"\n+       width=\"14.835566\"\n+       height=\"11.339286\"\n+       x=\"19.750116\"\n+       y=\"274.75986\" />\n+    <text\n+       xml:space=\"preserve\"\n+       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b/doc/guides/sample_app_ug/vm_power_management.rst\n@@ -1,119 +1,128 @@\n ..  SPDX-License-Identifier: BSD-3-Clause\n     Copyright(c) 2010-2014 Intel Corporation.\n \n-VM Power Management Application\n-===============================\n-\n-Introduction\n-------------\n-\n-Applications running in Virtual Environments have an abstract view of\n-the underlying hardware on the Host, in particular applications cannot see\n-the binding of virtual to physical hardware.\n-When looking at CPU resourcing, the pinning of Virtual CPUs(vCPUs) to\n-Host Physical CPUs(pCPUS) is not apparent to an application\n-and this pinning may change over time.\n-Furthermore, Operating Systems on virtual machines do not have the ability\n-to govern their own power policy; the Machine Specific Registers (MSRs)\n-for enabling P-State transitions are not exposed to Operating Systems\n-running on Virtual Machines(VMs).\n-\n-The Virtual Machine Power Management solution shows an example of\n-how a DPDK application can indicate its processing requirements using VM local\n-only information(vCPU/lcore, etc.) to a Host based Monitor which is responsible\n-for accepting requests for frequency changes for a vCPU, translating the vCPU\n-to a pCPU via libvirt and affecting the change in frequency.\n-\n-The solution is comprised of two high-level components:\n-\n-#. Example Host Application\n-\n-   Using a Command Line Interface(CLI) for VM->Host communication channel management\n-   allows adding channels to the Monitor, setting and querying the vCPU to pCPU pinning,\n-   inspecting and manually changing the frequency for each CPU.\n-   The CLI runs on a single lcore while the thread responsible for managing\n-   VM requests runs on a second lcore.\n-\n-   VM requests arriving on a channel for frequency changes are passed\n-   to the librte_power ACPI cpufreq sysfs based library.\n-   The Host Application relies on both qemu-kvm and libvirt to function.\n-\n-   This monitoring application is responsible for:\n-\n-   - Accepting requests from client applications: Client applications can\n-     request frequency changes for a vCPU, translating\n-     the vCPU to a pCPU via libvirt and affecting the change in frequency.\n-\n-   - Accepting policies from client applications: Client application can\n-     send a policy to the host application. The\n-     host application will then apply the rules of the policy independent\n-     of the application. For example, the policy can contain time-of-day\n-     information for busy/quiet periods, and the host application can scale\n-     up/down the relevant cores when required. See the details of the guest\n-     application below for more information on setting the policy values.\n-\n-   - Out-of-band monitoring of workloads via cores hardware event counters:\n-     The host application can manage power for an application in a virtualised\n-     OR non-virtualised environment by looking at the event counters of the\n-     cores and taking action based on the branch hit/miss ratio. See the host\n-     application '--core-list' command line parameter below.\n-\n-#. librte_power for Virtual Machines\n-\n-   Using an alternate implementation for the librte_power API, requests for\n-   frequency changes are forwarded to the host monitor rather than\n-   the APCI cpufreq sysfs interface used on the host.\n-\n-   The l3fwd-power application will use this implementation when deployed on a VM\n-   (see :doc:`l3_forward_power_man`).\n+Virtual Machine Power Management Application\n+============================================\n+\n+Applications running in virtual environments have an abstract view of\n+the underlying hardware on the host. Specifically, applications cannot\n+see the binding of virtual components to physical hardware. When looking\n+at CPU resourcing, the pinning of Virtual CPUs (vCPUs) to Physical CPUs\n+(pCPUs) on the host is not apparent to an application and this pinning\n+may change over time. In addition, operating systems on Virtual Machines\n+(VMs) do not have the ability to govern their own power policy. The\n+Machine Specific Registers (MSRs) for enabling P-state transitions are\n+not exposed to the operating systems running on the VMs.\n+\n+The solution demonstrated in this sample application shows an example of\n+how a DPDK application can indicate its processing requirements using\n+VM-local only information (vCPU/lcore, and so on) to a host resident VM\n+Power Manager. The VM Power Manager is responsible for:\n+\n+- **Accepting requests for frequency changes for a vCPU**\n+- **Translating the vCPU to a pCPU using libvirt**\n+- **Performing the change in frequency**\n+\n+This application demonstrates the following features:\n+\n+- **The handling of VM application requests to change frequency.**\n+  VM applications can request frequency changes for a vCPU. The VM\n+  Power Management Application uses libvirt to translate that\n+  virtual CPU (vCPU) request to a physical CPU (pCPU) request and\n+  performs the frequency change.\n+\n+- **The acceptance of power management policies from VM applications.**\n+  A VM application can send a policy to the host application. The\n+  policy contains rules that define the power management behaviour\n+  of the VM. The host application then applies the rules of the\n+  policy independent of the VM application. For example, the\n+  policy can contain time-of-day information for busy/quiet\n+  periods, and the host application can scale up/down the relevant\n+  cores when required. See :ref:`sending_policy` for information on\n+  setting policy values.\n+\n+- **Out-of-band monitoring of workloads using core hardware event counters.**\n+  The host application can manage power for an application by looking\n+  at the event counters of the cores and taking action based on the\n+  branch miss/hit ratio. See :ref:`enabling_out_of_band`.\n+\n+  **Note**: This functionality also applies in non-virtualised environments.\n+\n+In addition to the ``librte_power`` library used on the host, the\n+application uses a special version of ``librte_power`` on each VM, which\n+directs frequency changes and policies to the host monitor rather than\n+the APCI ``cpufreq`` ``sysfs`` interface used on the host in non-virtualised\n+environments.\n \n .. _figure_vm_power_mgr_highlevel:\n \n .. figure:: img/vm_power_mgr_highlevel.*\n \n-   Highlevel Solution\n+Sample Application Architecture Overview\n+----------------------------------------\n+\n+The VM power management solution employs ``qemu-kvm`` to provide\n+communications channels between the host and VMs in the form of a\n+``virtio-serial`` connection that appears as a para-virtualised serial\n+device on a VM and can be configured to use various backends on the\n+host. For this example, the configuration of each ``virtio-serial`` endpoint\n+on the host as an ``AF_UNIX`` file socket, supporting poll/select and\n+``epoll`` for event notification. In this example, each channel endpoint on\n+the host is monitored for ``EPOLLIN`` events using ``epoll``. Each channel\n+is specified as ``qemu-kvm`` arguments or as ``libvirt`` XML for each VM,\n+where each VM can have several channels up to a maximum of 64 per VM. In this\n+example, each DPDK lcore on a VM has exclusive access to a channel.\n+\n+To enable frequency changes from within a VM, the VM forwards a\n+``librte_power`` request over the ``virtio-serial`` channel to the host. Each\n+request contains the vCPU and power command (scale up/down/min/max). The\n+API for the host ``librte_power`` and guest ``librte_power`` is consistent\n+across environments, with the selection of VM or host implementation\n+determined automatically at runtime based on the environment. On\n+receiving a request, the host translates the vCPU to a pCPU using the\n+libvirt API before forwarding it to the host ``librte_power``.\n \n \n-Overview\n---------\n-\n-VM Power Management employs qemu-kvm to provide communications channels\n-between the host and VMs in the form of Virtio-Serial which appears as\n-a paravirtualized serial device on a VM and can be configured to use\n-various backends on the host. For this example each Virtio-Serial endpoint\n-on the host is configured as AF_UNIX file socket, supporting poll/select\n-and epoll for event notification.\n-In this example each channel endpoint on the host is monitored via\n-epoll for EPOLLIN events.\n-Each channel is specified as qemu-kvm arguments or as libvirt XML for each VM,\n-where each VM can have a number of channels up to a maximum of 64 per VM,\n-in this example each DPDK lcore on a VM has exclusive access to a channel.\n-\n-To enable frequency changes from within a VM, a request via the librte_power interface\n-is forwarded via Virtio-Serial to the host, each request contains the vCPU\n-and power command(scale up/down/min/max).\n-The API for host and guest librte_power is consistent across environments,\n-with the selection of VM or Host Implementation determined at automatically\n-at runtime based on the environment.\n-\n-Upon receiving a request, the host translates the vCPU to a pCPU via\n-the libvirt API before forwarding to the host librte_power.\n-\n .. _figure_vm_power_mgr_vm_request_seq:\n \n .. figure:: img/vm_power_mgr_vm_request_seq.*\n \n-   VM request to scale frequency\n-\n+In addition to the ability to send power management requests to the\n+host, a VM can send a power management policy to the host. In some\n+cases, using a power management policy is a preferred option because it\n+can eliminate possible latency issues that can occur when sending power\n+management requests. Once the VM sends the policy to the host, the VM no\n+longer needs to worry about power management, because the host now\n+manages the power for the VM based on the policy. The policy can specify\n+power behavior that is based on incoming traffic rates or time-of-day\n+power adjustment (busy/quiet hour power adjustment for example). See\n+:ref:`sending_policy` for more information.\n+\n+One method of power management is to sense how busy a core is when\n+processing packets and adjusting power accordingly. One technique for\n+doing this is to monitor the ratio of the branch miss to branch hits\n+counters and scale the core power accordingly. This technique is based\n+on the premise that when a core is not processing packets, the ratio of\n+branch misses to branch hits is very low, but when the core is\n+processing packets, it is measurably higher. The implementation of this\n+capability is as a policy of type ``BRANCH_RATIO``.\n+See :ref:`sending_policy` for more information on using the\n+BRANCH_RATIO policy option.\n+\n+A JSON interface enables the specification of power management requests\n+and policies in JSON format. The JSON interfaces provide a more\n+convenient and more easily interpreted interface for the specification\n+of requests and policies. See :ref:`power_man_requests` for more information.\n \n Performance Considerations\n ~~~~~~~~~~~~~~~~~~~~~~~~~~\n \n-While Haswell Microarchitecture allows for independent power control for each core,\n-earlier Microarchtectures do not offer such fine grained control.\n-When deployed on pre-Haswell platforms greater care must be taken in selecting\n-which cores are assigned to a VM, for instance a core will not scale down\n-until its sibling is similarly scaled.\n+While the Haswell microarchitecture allows for independent power control\n+for each core, earlier microarchitectures do not offer such fine-grained\n+control. When deploying on pre-Haswell platforms, greater care must be\n+taken when selecting which cores are assigned to a VM, for example, a\n+core does not scale down in frequency until all of its siblings are\n+similarly scaled down.\n \n Configuration\n -------------\n@@ -121,636 +130,541 @@ Configuration\n BIOS\n ~~~~\n \n-Enhanced Intel SpeedStep® Technology must be enabled in the platform BIOS\n-if the power management feature of DPDK is to be used.\n-Otherwise, the sys file folder /sys/devices/system/cpu/cpu0/cpufreq will not exist,\n-and the CPU frequency-based power management cannot be used.\n-Consult the relevant BIOS documentation to determine how these settings\n-can be accessed.\n+To use the power management features of the DPDK, you must enable\n+Enhanced Intel SpeedStep® Technology in the platform BIOS. Otherwise,\n+the ``sys`` file folder ``/sys/devices/system/cpu/cpu0/cpufreq`` does not\n+exist, and you cannot use CPU frequency-based power management. Refer to the\n+relevant BIOS documentation to determine how to access these settings.\n \n Host Operating System\n ~~~~~~~~~~~~~~~~~~~~~\n \n-The DPDK Power Library can use either the *acpi_cpufreq* or *intel_pstate*\n-kernel driver for the management of core frequencies. In many cases\n-the *intel_pstate* driver is the default Power Management environment.\n+The DPDK Power Management library can use either the ``acpi_cpufreq`` or\n+the ``intel_pstate`` kernel driver for the management of core frequencies. In\n+many cases, the ``intel_pstate`` driver is the default power management\n+environment.\n \n-Should the *acpi-cpufreq* driver be required, the *intel_pstate* module must\n-be disabled, and *apci_cpufreq* module loaded in its place.\n+Should the ``acpi-cpufreq driver`` be required, the ``intel_pstate``\n+module must be disabled, and the ``acpi-cpufreq`` module loaded in its place.\n \n-To disable *intel_pstate* driver, add the following to the grub Linux\n-command line:\n+To disable the ``intel_pstate`` driver, add the following to the ``grub``\n+Linux command line:\n \n-.. code-block:: console\n+   ``intel_pstate=disable``\n \n-  intel_pstate=disable\n+On reboot, load the ``acpi_cpufreq`` module:\n \n-Upon rebooting, load the *acpi_cpufreq* module:\n-\n-.. code-block:: console\n-\n-  modprobe acpi_cpufreq\n+   ``modprobe acpi_cpufreq``\n \n Hypervisor Channel Configuration\n ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n \n-Virtio-Serial channels are configured via libvirt XML:\n-\n+Configure ``virtio-serial`` channels using ``libvirt`` XML.\n+The XML structure is as follows: \n \n-.. code-block:: xml\n+.. code-block:: XML\n \n-  <name>{vm_name}</name>\n-  <controller type='virtio-serial' index='0'>\n-    <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>\n-  </controller>\n-  <channel type='unix'>\n-    <source mode='bind' path='/tmp/powermonitor/{vm_name}.{channel_num}'/>\n-    <target type='virtio' name='virtio.serial.port.poweragent.{vm_channel_num}'/>\n-    <address type='virtio-serial' controller='0' bus='0' port='{N}'/>\n-  </channel>\n+   <name>{vm_name}</name>\n+   <controller type='virtio-serial' index='0'>\n+      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>\n+   </controller>\n+   <channel type='unix'>\n+      <source mode='bind' path='/tmp/powermonitor/{vm_name}.{channel_num}'/>\n+      <target type='virtio' name='virtio.serial.port.poweragent.{vm_channel_num}'/>\n+      <address type='virtio-serial' controller='0' bus='0' port='{N}'/>\n+   </channel>\n \n+Where a single controller of type ``virtio-serial`` is created, up to 32\n+channels can be associated with a single controller, and multiple\n+controllers can be specified. The convention is to use the name of the\n+VM in the host path ``{vm_name}`` and to increment ``{channel_num}`` for each\n+channel. Likewise, the port value ``{N}`` must be incremented for each\n+channel.\n \n-Where a single controller of type *virtio-serial* is created and up to 32 channels\n-can be associated with a single controller and multiple controllers can be specified.\n-The convention is to use the name of the VM in the host path *{vm_name}* and\n-to increment *{channel_num}* for each channel, likewise the port value *{N}*\n-must be incremented for each channel.\n-\n-Each channel on the host will appear in *path*, the directory */tmp/powermonitor/*\n-must first be created and given qemu permissions\n+On the host, for each channel to appear in the path, ensure the creation\n+of the ``/tmp/powermonitor/`` directory and the assignment of ``qemu``\n+permissions:\n \n .. code-block:: console\n \n-  mkdir /tmp/powermonitor/\n-  chown qemu:qemu /tmp/powermonitor\n+   mkdir /tmp/powermonitor/\n+   chown qemu:qemu /tmp/powermonitor\n+\n+Note that files and directories in ``/tmp`` are generally removed when\n+rebooting the host and you may need to perform the previous steps after\n+each reboot.\n \n-Note that files and directories within /tmp are generally removed upon\n-rebooting the host and the above steps may need to be carried out after each reboot.\n+The serial device as it appears on a VM is configured with the target\n+element attribute name and must be in the form:\n+``virtio.serial.port.poweragent.{vm_channel_num}``, where\n+``vm_channel_num`` is typically the lcore channel to be used in\n+DPDK VM applications.\n \n-The serial device as it appears on a VM is configured with the *target* element attribute *name*\n-and must be in the form of *virtio.serial.port.poweragent.{vm_channel_num}*,\n-where *vm_channel_num* is typically the lcore channel to be used in DPDK VM applications.\n+Each channel on a VM is present at:\n \n-Each channel on a VM will be present at */dev/virtio-ports/virtio.serial.port.poweragent.{vm_channel_num}*\n+``/dev/virtio-ports/virtio.serial.port.poweragent.{vm_channel_num}``\n \n Compiling and Running the Host Application\n ------------------------------------------\n \n-Compiling\n-~~~~~~~~~\n+Compiling the Host Application\n+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n \n-For information on compiling DPDK and the sample applications\n+For information on compiling the DPDK and sample applications, see\n see :doc:`compiling`.\n \n-The application is located in the ``vm_power_manager`` sub-directory.\n+The application is located in the ``vm_power_manager`` subdirectory.\n \n To build just the ``vm_power_manager`` application using ``make``:\n \n .. code-block:: console\n \n-  export RTE_SDK=/path/to/rte_sdk\n-  export RTE_TARGET=build\n-  cd ${RTE_SDK}/examples/vm_power_manager/\n-  make\n+   export RTE_SDK=/path/to/rte_sdk\n+   export RTE_TARGET=build\n+   cd ${RTE_SDK}/examples/vm_power_manager/\n+   make\n \n-The resulting binary will be ${RTE_SDK}/build/examples/vm_power_manager\n+The resulting binary is ``${RTE_SDK}/build/examples/vm_power_manager``.\n \n-To build just the ``vm_power_manager`` application using ``meson/ninja``:\n+To build just the ``vm_power_manager`` application using ``meson``/``ninja``:\n \n .. code-block:: console\n \n-  export RTE_SDK=/path/to/rte_sdk\n-  cd ${RTE_SDK}\n-  meson build\n-  cd build\n-  ninja\n-  meson configure -Dexamples=vm_power_manager\n-  ninja\n+   export RTE_SDK=/path/to/rte_sdk\n+   cd ${RTE_SDK}\n+   meson build\n+   cd build\n+   ninja\n+   meson configure -Dexamples=vm_power_manager\n+   ninja\n \n-The resulting binary will be ${RTE_SDK}/build/examples/dpdk-vm_power_manager\n+The resulting binary is ``${RTE_SDK}/build/examples/dpdk-vm_power_manager``.\n \n-Running\n-~~~~~~~\n+Running the Host Application\n+~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n \n-The application does not have any specific command line options other than *EAL*:\n+The application does not have any specific command line options other\n+than the EAL options:\n \n .. code-block:: console\n \n- ./build/vm_power_mgr [EAL options]\n+   ./build/vm_power_mgr [EAL options]\n \n-The application requires exactly two cores to run, one core is dedicated to the CLI,\n-while the other is dedicated to the channel endpoint monitor, for example to run\n-on cores 0 & 1 on a system with 4 memory channels:\n+The application requires exactly two cores to run. One core for the CLI\n+and the other for the channel endpoint monitor. For example, to run on\n+cores 0 and 1 on a system with four memory channels, issue the command:\n \n .. code-block:: console\n \n- ./build/vm_power_mgr -l 0-1 -n 4\n+   ./build/vm_power_mgr -l 0-1 -n 4\n \n-After successful initialization the user is presented with VM Power Manager CLI:\n+After successful initialization, the VM Power Manager CLI prompt appears:\n \n .. code-block:: console\n \n-  vm_power>\n+   vm_power>\n \n-Virtual Machines can now be added to the VM Power Manager:\n+Now, it is possible to add virtual machines to the VM Power Manager:\n \n .. code-block:: console\n \n-  vm_power> add_vm {vm_name}\n-\n-When a {vm_name} is specified with the *add_vm* command a lookup is performed\n-with libvirt to ensure that the VM exists, {vm_name} is used as an unique identifier\n-to associate channels with a particular VM and for executing operations on a VM within the CLI.\n-VMs do not have to be running in order to add them.\n+   vm_power> add_vm {vm_name}\n \n-A number of commands can be issued via the CLI in relation to VMs:\n+When a ``{vm_name}`` is specified with the ``add_vm`` command, a lookup is\n+performed with ``libvirt`` to ensure that the VM exists. ``{vm_name}`` is a\n+unique identifier to associate channels with a particular VM and for\n+executing operations on a VM within the CLI. VMs do not have to be\n+running to add them.\n \n-  Remove a Virtual Machine identified by {vm_name} from the VM Power Manager.\n+It is possible to issue several commands from the CLI to manage VMs.\n \n-  .. code-block:: console\n-\n-    rm_vm {vm_name}\n-\n-  Add communication channels for the specified VM, the virtio channels must be enabled\n-  in the VM configuration(qemu/libvirt) and the associated VM must be active.\n-  {list} is a comma-separated list of channel numbers to add, using the keyword 'all'\n-  will attempt to add all channels for the VM:\n-\n-  .. code-block:: console\n-\n-    add_channels {vm_name} {list}|all\n-\n-  Enable or disable the communication channels in {list}(comma-separated)\n-  for the specified VM, alternatively list can be replaced with keyword 'all'.\n-  Disabled channels will still receive packets on the host, however the commands\n-  they specify will be ignored. Set status to 'enabled' to begin processing requests again:\n-\n-  .. code-block:: console\n-\n-    set_channel_status {vm_name} {list}|all enabled|disabled\n-\n-  Print to the CLI the information on the specified VM, the information\n-  lists the number of vCPUS, the pinning to pCPU(s) as a bit mask, along with\n-  any communication channels associated with each VM, along with the status of each channel:\n-\n-  .. code-block:: console\n+Remove the virtual machine identified by ``{vm_name}`` from the VM Power\n+Manager using the command:\n \n-    show_vm {vm_name}\n-\n-  Set the binding of Virtual CPU on VM with name {vm_name}  to the Physical CPU mask:\n-\n-  .. code-block:: console\n+.. code-block:: console\n \n-    set_pcpu_mask {vm_name} {vcpu} {pcpu}\n+   rm_vm {vm_name}\n \n-  Set the binding of Virtual CPU on VM to the Physical CPU:\n+Add communication channels for the specified VM using the following\n+command. The ``virtio`` channels must be enabled in the VM configuration\n+(``qemu/libvirt``) and the associated VM must be active. ``{list}`` is a\n+comma-separated list of channel numbers to add. Specifying the keyword\n+``all`` attempts to add all channels for the VM:\n \n-  .. code-block:: console\n+.. code-block:: console\n \n-    set_pcpu {vm_name} {vcpu} {pcpu}\n+   set_pcpu {vm_name} {vcpu} {pcpu}\n \n   Enable query of physical core information from a VM:\n \n-  .. code-block:: console\n+.. code-block:: console\n \n-    set_query {vm_name} enable|disable\n+   set_query {vm_name} enable|disable\n \n Manual control and inspection can also be carried in relation CPU frequency scaling:\n \n   Get the current frequency for each core specified in the mask:\n \n-  .. code-block:: console\n+.. code-block:: console\n \n-    show_cpu_freq_mask {mask}\n+   show_cpu_freq_mask {mask}\n \n   Set the current frequency for the cores specified in {core_mask} by scaling each up/down/min/max:\n \n-  .. code-block:: console\n+.. code-block:: console\n \n-    set_cpu_freq {core_mask} up|down|min|max\n+   add_channels {vm_name} {list}|all\n \n-  Get the current frequency for the specified core:\n+Enable or disable the communication channels in ``{list}`` (comma-separated)\n+for the specified VM. Alternatively, replace ``list`` with the keyword\n+``all``. Disabled channels receive packets on the host. However, the commands\n+they specify are ignored. Set the status to enabled to begin processing\n+requests again:\n \n-  .. code-block:: console\n-\n-    show_cpu_freq {core_num}\n+.. code-block:: console\n \n-  Set the current frequency for the specified core by scaling up/down/min/max:\n+   set_channel_status {vm_name} {list}|all enabled|disabled\n \n-  .. code-block:: console\n+Print to the CLI information on the specified VM. The information lists\n+the number of vCPUs, the pinning to pCPU(s) as a bit mask, along with\n+any communication channels associated with each VM, and the status of\n+each channel:\n \n-    set_cpu_freq {core_num} up|down|min|max\n+.. code-block:: console\n \n-There are also some command line parameters for enabling the out-of-band\n-monitoring of branch ratio on cores doing busy polling via PMDs.\n+   show_vm {vm_name}\n \n-  .. code-block:: console\n+Set the binding of a virtual CPU on a VM with name ``{vm_name}`` to the\n+physical CPU mask:\n \n-    --core-list {list of cores}\n+.. code-block:: console\n \n-  When this parameter is used, the list of cores specified will monitor the ratio\n-  between branch hits and branch misses. A tightly polling PMD thread will have a\n-  very low branch ratio, so the core frequency will be scaled down to the minimum\n-  allowed value. When packets are received, the code path will alter, causing the\n-  branch ratio to increase. When the ratio goes above the ratio threshold, the\n-  core frequency will be scaled up to the maximum allowed value.\n+   set_pcpu_mask {vm_name} {vcpu} {pcpu}\n \n+Set the binding of the virtual CPU on the VM to the physical CPU:\n+ \n   .. code-block:: console\n \n-    --branch-ratio {ratio}\n-\n-  The branch ratio is a floating point number that specifies the threshold at which\n-  to scale up or down for the given workload. The default branch ratio is 0.01,\n-  and will need to be adjusted for different workloads.\n-\n-\n-\n-JSON API\n-~~~~~~~~\n-\n-In addition to the command line interface for host command and a virtio-serial\n-interface for VM power policies, there is also a JSON interface through which\n-power commands and policies can be sent. This functionality adds a dependency\n-on the Jansson library, and the Jansson development package must be installed\n-on the system before the JSON parsing functionality is included in the app.\n-This is achieved by:\n-\n-  .. code-block:: javascript\n+   set_pcpu {vm_name} {vcpu} {pcpu}\n \n-    apt-get install libjansson-dev\n+It is also possible to perform manual control and inspection in relation\n+to CPU frequency scaling.\n \n-The command and package name may be different depending on your operating\n-system. It's worth noting that the app will successfully build without this\n-package present, but a warning is shown during compilation, and the JSON\n-parsing functionality will not be present in the app.\n+Get the current frequency for each core specified in the mask:\n \n-Sending a command or policy to the power manager application is achieved by\n-simply opening a fifo file, writing a JSON string to that fifo, and closing\n-the file. In actual implementation every core has own dedicated fifo[0..n],\n-where n is number of the last available core.\n-Having a dedicated fifo file per core allows using standard filesystem permissions\n-to ensure a given container can only write JSON commands into fifos it is allowed\n-to use.\n-\n-The fifo is at /tmp/powermonitor/fifo[0..n]\n-\n-For example all cmds put to the /tmp/powermonitor/fifo7, will have\n-effect only on CPU[7].\n-\n-The JSON string can be a policy or instruction, and takes the following\n-format:\n-\n-  .. code-block:: javascript\n-\n-    {\"packet_type\": {\n-      \"pair_1\": value,\n-      \"pair_2\": value\n-    }}\n-\n-The 'packet_type' header can contain one of two values, depending on\n-whether a policy or power command is being sent. The two possible values are\n-\"policy\" and \"instruction\", and the expected name-value pairs is different\n-depending on which type is being sent.\n-\n-The pairs are the format of standard JSON name-value pairs. The value type\n-varies between the different name/value pairs, and may be integers, strings,\n-arrays, etc. Examples of policies follow later in this document. The allowed\n-names and value types are as follows:\n-\n-\n-:Pair Name: \"command\"\n-:Description: The type of packet we're sending to the power manager. We can be\n-  creating or destroying a policy, or sending a direct command to adjust\n-  the frequency of a core, similar to the command line interface.\n-:Type: string\n-:Values:\n-\n-  :CREATE: used when creating a new policy,\n-  :DESTROY: used when removing a policy,\n-  :POWER: used when sending an immediate command, max, min, etc.\n-:Required: yes\n-:Example:\n+.. code-block:: console\n \n-    .. code-block:: javascript\n+   show_cpu_freq_mask {mask}\n \n-      \"command\", \"CREATE\"\n+Set the current frequency for the cores specified in ``{core_mask}`` by\n+scaling each up/down/min/max:\n \n+.. code-block:: console\n \n-:Pair Name: \"policy_type\"\n-:Description: Type of policy to apply. Please see vm_power_manager documentation\n-  for more information on the types of policies that may be used.\n-:Type: string\n-:Values:\n+   set_cpu_freq {core_mask} up|down|min|max\n \n-  :TIME: Time-of-day policy. Frequencies of the relevant cores are\n-    scaled up/down depending on busy and quiet hours.\n-  :TRAFFIC: This policy takes statistics from the NIC and scales up\n-    and down accordingly.\n-  :WORKLOAD: This policy looks at how heavily loaded the cores are,\n-    and scales up and down accordingly.\n-  :BRANCH_RATIO: This out-of-band policy can look at the ratio between\n-    branch hits and misses on a core, and is useful for detecting\n-    how much packet processing a core is doing.\n-:Required: only for CREATE/DESTROY command\n-:Example:\n+Get the current frequency for the specified core:\n \n-  .. code-block:: javascript\n+.. code-block:: console\n \n-    \"policy_type\", \"TIME\"\n+   show_cpu_freq {core_num}\n \n-:Pair Name: \"busy_hours\"\n-:Description: The hours of the day in which we scale up the cores for busy\n-  times.\n-:Type: array of integers\n-:Values: array with list of hour numbers, (0-23)\n-:Required: only for TIME policy\n-:Example:\n-\n-  .. code-block:: javascript\n-\n-    \"busy_hours\":[ 17, 18, 19, 20, 21, 22, 23 ]\n-\n-:Pair Name: \"quiet_hours\"\n-:Description: The hours of the day in which we scale down the cores for quiet\n-  times.\n-:Type: array of integers\n-:Values: array with list of hour numbers, (0-23)\n-:Required: only for TIME policy\n-:Example:\n+Set the current frequency for the specified core by scaling up/down/min/max:\n \n-  .. code-block:: javascript\n+.. code-block:: console\n \n-    \"quiet_hours\":[ 2, 3, 4, 5, 6 ]\n+   set_cpu_freq {core_num} up|down|min|max\n \n-:Pair Name: \"avg_packet_thresh\"\n-:Description: Threshold below which the frequency will be set to min for\n-  the TRAFFIC policy. If the traffic rate is above this and below max, the\n-  frequency will be set to medium.\n-:Type: integer\n-:Values: The number of packets below which the TRAFFIC policy applies the\n-  minimum frequency, or medium frequency if between avg and max thresholds.\n-:Required: only for TRAFFIC policy\n-:Example:\n+.. _enabling_out_of_band:\n \n-  .. code-block:: javascript\n+Command Line Options for Enabling Out-of-band Branch Ratio Monitoring\n+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n \n-    \"avg_packet_thresh\": 100000\n+There are a couple of command line parameters for enabling the out-of-band\n+monitoring of branch ratios on cores doing busy polling using PMDs as\n+described in the following table.\n \n-:Pair Name: \"max_packet_thresh\"\n-:Description: Threshold above which the frequency will be set to max for\n-  the TRAFFIC policy\n-:Type: integer\n-:Values: The number of packets per interval above which the TRAFFIC policy\n-  applies the maximum frequency\n-:Required: only for TRAFFIC policy\n-:Example:\n+Table 1 – Command Line Options for Enabling Out-of-band Monitoring of\n+Branch Ratios\n \n-  .. code-block:: javascript\n+=============================== ==============================================\n+**Command Line Option**         **Description**\n+=============================== ==============================================\n+``--core-list {list of cores}`` | Specify the list of cores to monitor the ratio of branch misses\n+                                | to branch hits.  A tightly-polling PMD thread has a very low\n+                                | branch ratio, therefore the core frequency scales down to the\n+                                | minimum allowed value. On receiving packets, the code path changes,\n+                                | causing the branch ratio to increase. When the ratio goes above\n+                                | the ratio threshold, the core frequency scales up to the maximum\n+                                | allowed value.\n+``--branch-ratio {ratio}``      | Specify a floating-point number that identifies the threshold at which\n+                                | to scale up or down for the given workload. The default branch ratio\n+                                | is 0.01 and needs adjustment for different workloads.\n+=============================== ==============================================\n \n-    \"max_packet_thresh\": 500000\n \n-:Pair Name: \"workload\"\n-:Description: When our policy is of type WORKLOAD, we need to specify how\n-  heavy our workload is.\n-:Type: string\n-:Values:\n \n-  :HIGH: For cores running workloads that require high frequencies\n-  :MEDIUM: For cores running workloads that require medium frequencies\n-  :LOW: For cores running workloads that require low frequencies\n-:Required: only for WORKLOAD policy types\n-:Example:\n+Compiling and Running the Guest Applications\n+--------------------------------------------\n \n-  .. code-block:: javascript\n+It is possible to use the ``l3fwd-power`` application (for example) with the\n+``vm_power_manager``.\n \n-    \"workload\", \"MEDIUM\"\n+The distribution also provides a guest CLI for validating the setup.\n \n-:Pair Name: \"mac_list\"\n-:Description: When our policy is of type TRAFFIC, we need to specify the\n-  MAC addresses that the host needs to monitor\n-:Type: string\n-:Values: array with a list of mac address strings.\n-:Required: only for TRAFFIC policy types\n-:Example:\n+For both ``l3fwd-power`` and the guest CLI, the host application must use\n+the ``add_channels`` command to monitor the channels for the VM. To do this,\n+issue the following commands in the host application:\n \n-  .. code-block:: javascript\n+.. code-block:: console\n \n-    \"mac_list\":[ \"de:ad:be:ef:01:01\", \"de:ad:be:ef:01:02\" ]\n+   vm_power> add_vm vmname\n+   vm_power> add_channels vmname all\n+   vm_power> set_channel_status vmname all enabled\n+   vm_power> show_vm vmname\n \n-:Pair Name: \"unit\"\n-:Description: the type of power operation to apply in the command\n-:Type: string\n-:Values:\n+Compiling the Guest Application\n+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n \n-  :SCALE_MAX: Scale frequency of this core to maximum\n-  :SCALE_MIN: Scale frequency of this core to minimum\n-  :SCALE_UP: Scale up frequency of this core\n-  :SCALE_DOWN: Scale down frequency of this core\n-  :ENABLE_TURBO: Enable Turbo Boost for this core\n-  :DISABLE_TURBO: Disable Turbo Boost for this core\n-:Required: only for POWER instruction\n-:Example:\n+For information on compiling DPDK and the sample applications in general,\n+see :doc:`compiling`.\n \n-  .. code-block:: javascript\n+For compiling and running the ``l3fwd-power`` sample application, see\n+:doc:`l3_forward_power_man`.\n \n-    \"unit\", \"SCALE_MAX\"\n+The application is in the ``guest_cli`` subdirectory under ``vm_power_manager``.\n \n-JSON API Examples\n-~~~~~~~~~~~~~~~~~\n+To build just the ``guest_vm_power_manager`` application using ``make``, issue\n+the following commands:\n \n-Profile create example:\n+.. code-block:: console\n \n-  .. code-block:: javascript\n+   export RTE_SDK=/path/to/rte_sdk\n+   export RTE_TARGET=build\n+   cd ${RTE_SDK}/examples/vm_power_manager/guest_cli/\n+   make\n \n-    {\"policy\": {\n-      \"command\": \"create\",\n-      \"policy_type\": \"TIME\",\n-      \"busy_hours\":[ 17, 18, 19, 20, 21, 22, 23 ],\n-      \"quiet_hours\":[ 2, 3, 4, 5, 6 ]\n-    }}\n+The resulting binary is ``${RTE_SDK}/build/examples/guest_cli``.\n \n-Profile destroy example:\n+**Note**: This sample application conditionally links in the Jansson JSON\n+library. Consequently, if you are using a multilib or cross-compile\n+environment, you may need to set the ``PKG_CONFIG_LIBDIR`` environmental\n+variable to point to the relevant ``pkgconfig`` folder so that the correct\n+library is linked in.\n \n-  .. code-block:: javascript\n+For example, if you are building for a 32-bit target, you could find the\n+correct directory using the following find command:\n \n-    {\"policy\": {\n-      \"command\": \"destroy\"\n-    }}\n+.. code-block:: console\n \n-Power command example:\n+   # find /usr -type d -name pkgconfig\n+   /usr/lib/i386-linux-gnu/pkgconfig\n+   /usr/lib/x86_64-linux-gnu/pkgconfig\n \n-  .. code-block:: javascript\n+Then use:\n \n-    {\"instruction\": {\n-      \"command\": \"power\",\n-      \"unit\": \"SCALE_MAX\"\n-    }}\n+.. code-block:: console\n \n-To send a JSON string to the Power Manager application, simply paste the\n-example JSON string into a text file and cat it into the proper fifo:\n+   export PKG_CONFIG_LIBDIR=/usr/lib/i386-linux-gnu/pkgconfig\n \n-  .. code-block:: console\n+You then use the ``make`` command as normal, which should find the 32-bit\n+version of the library, if it installed. If not, the application builds\n+without the JSON interface functionality.\n \n-    cat file.json >/tmp/powermonitor/fifo[0..n]\n+To build just the ``vm_power_manager`` application using ``meson``/``ninja``:\n \n-The console of the Power Manager application should indicate the command that\n-was just received via the fifo.\n+.. code-block:: console\n \n-Compiling and Running the Guest Applications\n---------------------------------------------\n+   export RTE_SDK=/path/to/rte_sdk\n+   cd ${RTE_SDK}\n+   meson build\n+   cd build\n+   ninja\n+   meson configure -Dexamples=vm_power_manager/guest_cli\n+   ninja\n \n-l3fwd-power is one sample application that can be used with vm_power_manager.\n+The resulting binary is ``${RTE_SDK}/build/examples/guest_cli``.\n \n-A guest CLI is also provided for validating the setup.\n+Running the Guest Application\n+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n \n-For both l3fwd-power and guest CLI, the channels for the VM must be monitored by the\n-host application using the *add_channels* command on the host. This typically uses\n-the following commands in the host application:\n+The standard EAL command line parameters are necessary:\n \n .. code-block:: console\n \n-  vm_power> add_vm vmname\n-  vm_power> add_channels vmname all\n-  vm_power> set_channel_status vmname all enabled\n-  vm_power> show_vm vmname\n-\n+   ./build/vm_power_mgr [EAL options] -- [guest options]\n \n-Compiling\n-~~~~~~~~~\n+The guest example uses a channel for each lcore enabled. For example, to\n+run on cores 0, 1, 2 and 3:\n \n-For information on compiling DPDK and the sample applications\n-see :doc:`compiling`.\n+.. code-block:: console\n \n-For compiling and running l3fwd-power, see :doc:`l3_forward_power_man`.\n+   ./build/guest_vm_power_mgr -l 0-3\n \n-The application is located in the ``guest_cli`` sub-directory under ``vm_power_manager``.\n+.. _sending_policy:\n \n-To build just the ``guest_vm_power_manager`` application using ``make``:\n+Command Line Options Available When Sending a Policy to the Host\n+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n \n-.. code-block:: console\n+Optionally, there are several command line options for a user who needs\n+to send a power policy to the host application. The following table\n+describes these options.\n \n-  export RTE_SDK=/path/to/rte_sdk\n-  export RTE_TARGET=build\n-  cd ${RTE_SDK}/examples/vm_power_manager/guest_cli/\n-  make\n+Table 1 – Command Line Options Available When Sending a Policy to the Host\n \n-The resulting binary will be ${RTE_SDK}/build/examples/guest_cli\n+======================================= ======================================\n+**Command Line Option**                 **Description**\n+======================================= ======================================\n+``--vm-name {name of guest vm}``        | Allows the user to change the virtual machine name passed\n+                                        | down to the host application using the power policy. The\n+                                        | default is ubuntu2.\n+``--vcpu-list {list vm cores}``         | A comma-separated list of cores in the VM that the user\n+                                        | wants the host application to monitor. The list of cores\n+                                        | in any vm starts at zero, and the host application maps\n+                                        | these to the physical cores once the policy passes down\n+                                        | to the host. Valid syntax includes individual cores\n+                                        | 2,3,4, a range of cores 2-4, or a combination of both\n+                                        | 1,3,5-7.\n+``--busy-hours {list of busy hours}``   | A comma-separated list of hours in which to set the core\n+                                        | frequency to the maximum. Valid syntax includes\n+                                        | individual hours 2,3,4, a range of hours 2-4, or a\n+                                        | combination of both 1,3,5-7. Valid hour values are 0 to 23.\n+``--quiet-hours {list of quiet hours}`` | A comma-separated list of hours in which to set the core\n+                                        | frequency to minimum. Valid syntax includes individual\n+                                        | hours 2,3,4, a range of hours 2-4, or a combination of\n+                                        | both 1,3,5-7. Valid hour values are 0 to 23.\n+``--policy {policy type}``              | The type of policy. This can be one of the following values:\n \n-.. Note::\n-  This sample application conditionally links in the Jansson JSON\n-  library, so if you are using a multilib or cross compile environment you\n-  may need to set the ``PKG_CONFIG_LIBDIR`` environmental variable to point to\n-  the relevant pkgconfig folder so that the correct library is linked in.\n+                                        - | TRAFFIC Based on incoming traffic rates on the NIC.\n \n-  For example, if you are building for a 32-bit target, you could find the\n-  correct directory using the following ``find`` command:\n+                                        - | TIME - Uses a busy/quiet hours policy.\n \n-  .. code-block:: console\n+                                        - | BRANCH_RATIO - Uses branch ratio counters to determine\n+                                          | core busyness.\n \n-      # find /usr -type d -name pkgconfig\n-      /usr/lib/i386-linux-gnu/pkgconfig\n-      /usr/lib/x86_64-linux-gnu/pkgconfig\n+                                        - | WORKLOAD - Sets the frequency to low, medium or high\n+                                          | based on the received policy setting.\n \n-  Then use:\n+                                        | **Note**: Not all policy types need all parameters. For\n+                                        |           example, BRANCH_RATIO only needs the vcpu-list\n+                                        |           parameter.\n+======================================= ======================================\n \n-  .. code-block:: console\n+After successful initialization, the VM Power Manager Guest CLI prompt\n+appears:\n \n-      export PKG_CONFIG_LIBDIR=/usr/lib/i386-linux-gnu/pkgconfig\n+.. code-block:: console\n \n-  You then use the make command as normal, which should find the 32-bit\n-  version of the library, if it installed. If not, the application will\n-  be built without the JSON interface functionality.\n+   vm_power(guest)>\n \n-To build just the ``vm_power_manager`` application using ``meson/ninja``:\n+To change the frequency of an lcore, use a ``set_cpu_freq`` command similar\n+to the following:\n \n .. code-block:: console\n \n-  export RTE_SDK=/path/to/rte_sdk\n-  cd ${RTE_SDK}\n-  meson build\n-  cd build\n-  ninja\n-  meson configure -Dexamples=vm_power_manager/guest_cli\n-  ninja\n-\n-The resulting binary will be ${RTE_SDK}/build/examples/guest_cli\n+   set_cpu_freq {core_num} up|down|min|max\n \n-Running\n-~~~~~~~\n+where, ``{core_num}`` is the lcore and channel to change frequency by\n+scaling up/down/min/max.\n \n-The standard *EAL* command line parameters are required:\n+To start an application, configure the power policy, and send it to the\n+host, use a command like the following:\n \n .. code-block:: console\n \n- ./build/guest_vm_power_mgr [EAL options] -- [guest options]\n+   ./build/guest_vm_power_mgr -l 0-3 -n 4 -- --vm-name=ubuntu --policy=BRANCH_RATIO --vcpu-list=2-4\n \n-The guest example uses a channel for each lcore enabled. For example,\n-to run on cores 0,1,2,3:\n+Once the VM Power Manager Guest CLI appears, issuing the 'send_policy now' command\n+will send the policy to the host:\n \n .. code-block:: console\n \n- ./build/guest_vm_power_mgr -l 0-3\n-\n-Optionally, there is a list of command line parameter should the user wish to send a power\n-policy down to the host application. These parameters are as follows:\n+  send_policy now\n \n-  .. code-block:: console\n+Once the policy is sent to the host, the host application takes over the power monitoring\n+of the specified cores in the policy.\n \n-    --vm-name {name of guest vm}\n+.. _power_man_requests:\n \n-  This parameter allows the user to change the Virtual Machine name passed down to the\n-  host application via the power policy. The default is \"ubuntu2\"\n+JSON Interface for Power Management Requests and Policies\n+---------------------------------------------------------\n \n-  .. code-block:: console\n+In addition to the command line interface for the host command, and a\n+``virtio-serial`` interface for VM power policies, there is also a JSON\n+interface through which power commands and policies can be sent.\n \n-    --vcpu-list {list vm cores}\n+**Note**: This functionality adds a dependency on the Jansson library.\n+Install the Jansson development package on the system to avail of the\n+JSON parsing functionality in the app. Issue the ``apt-get install\n+libjansson-dev`` command to install the development package. The command\n+and package name may be different depending on your operating system. It\n+is worth noting that the app builds successfully if this package is not\n+present, but a warning displays during compilation, and the JSON parsing\n+functionality is not present in the app.\n \n-  A comma-separated list of cores in the VM that the user wants the host application to\n-  monitor. The list of cores in any vm starts at zero, and these are mapped to the\n-  physical cores by the host application once the policy is passed down.\n-  Valid syntax includes individual cores '2,3,4', or a range of cores '2-4', or a\n-  combination of both '1,3,5-7'\n+Send a request or policy to the VM Power Manager by simply opening a\n+fifo file at ``/tmp/powermonitor/fifo``, writing a JSON string to that file,\n+and closing the file.\n \n-  .. code-block:: console\n+The JSON string can be a power management request or a policy, and takes\n+the following format:\n \n-    --busy-hours {list of busy hours}\n+.. code-block:: javascript\n \n-  A comma-separated list of hours within which to set the core frequency to maximum.\n-  Valid syntax includes individual hours '2,3,4', or a range of hours '2-4', or a\n-  combination of both '1,3,5-7'. Valid hours are 0 to 23.\n+   {\"packet_type\": {\n+   \"pair_1\": value,\n+   \"pair_2\": value\n+   }}\n \n-  .. code-block:: console\n+The ``packet_type`` header can contain one of two values, depending on\n+whether a power management request or policy is being sent. The two\n+possible values are ``instruction`` and ``policy`` and the expected name-value\n+pairs are different depending on which type is sent.\n \n-    --quiet-hours {list of quiet hours}\n+The pairs are in the format of standard JSON name-value pairs. The value\n+type varies between the different name-value pairs, and may be integers,\n+strings, arrays, and so on. See :ref:`json_interface_ex`\n+for examples of policies and instructions and\n+:ref:`json_name_value_pair` for the supported names and value types.\n \n-  A comma-separated list of hours within which to set the core frequency to minimum.\n-  Valid syntax includes individual hours '2,3,4', or a range of hours '2-4', or a\n-  combination of both '1,3,5-7'. Valid hours are 0 to 23.\n+.. _json_interface_ex:\n \n-  .. code-block:: console\n+JSON Interface Examples\n+~~~~~~~~~~~~~~~~~~~~~~~\n \n-    --policy {policy type}\n+The following is an example JSON string that creates a time-profile\n+policy.\n \n-  The type of policy. This can be one of the following values:\n-  TRAFFIC - based on incoming traffic rates on the NIC.\n-  TIME - busy/quiet hours policy.\n-  BRANCH_RATIO - uses branch ratio counters to determine core busyness.\n-  Not all parameters are needed for all policy types. For example, BRANCH_RATIO\n-  only needs the vcpu-list parameter, not any of the hours.\n+.. code-block:: JSON\n \n+   {\"policy\": {\n+   \"name\": \"ubuntu\",\n+   \"command\": \"create\",\n+   \"policy_type\": \"TIME\",\n+   \"busy_hours\":[ 17, 18, 19, 20, 21, 22, 23 ],\n+   \"quiet_hours\":[ 2, 3, 4, 5, 6 ],\n+   \"core_list\":[ 11 ]\n+   }}\n \n-After successful initialization the user is presented with VM Power Manager Guest CLI:\n+The following is an example JSON string that removes the named policy.\n \n-.. code-block:: console\n+.. code-block:: JSON\n \n-  vm_power(guest)>\n+   {\"policy\": {\n+   \"name\": \"ubuntu\",\n+   \"command\": \"destroy\",\n+   }}\n \n-To change the frequency of a lcore, use the set_cpu_freq command.\n-Where {core_num} is the lcore and channel to change frequency by scaling up/down/min/max.\n+The following is an example JSON string for a power management request.\n \n-.. code-block:: console\n+.. code-block:: JSON\n \n-  set_cpu_freq {core_num} up|down|min|max\n+   {\"instruction\": {\n+   \"name\": \"ubuntu\",\n+   \"command\": \"power\",\n+   \"unit\": \"SCALE_MAX\",\n+   \"resource_id\": 10\n+   }}\n \n To query the available frequences of an lcore, use the query_cpu_freq command.\n Where {core_num} is the lcore to query.\n@@ -783,3 +697,215 @@ will send the policy to the host:\n \n Once the policy is sent to the host, the host application takes over the power monitoring\n of the specified cores in the policy.\n+\n+.. _json_name_value_pair:\n+\n+JSON Name-value Pairs\n+~~~~~~~~~~~~~~~~~~~~~\n+\n+The following are the name-value pairs supported by the JSON interface:\n+\n+-  `avg_packet_thresh`_\n+-  `busy_hours`_\n+-  `command`_\n+-  `core_list`_\n+-  `mac_list`_\n+-  `max_packet_thresh`_\n+-  `name`_\n+-  `policy_type`_\n+-  `quiet_hours`_\n+-  `resource_id`_\n+-  `unit`_\n+-  `workload`_\n+\n+avg_packet_thresh\n+^^^^^^^^^^^^^^^^^\n+\n+================== ===========================================================\n+ **Pair Name:**     \"avg_packet_thresh\"\n+================== ===========================================================\n+ **Description:**   | The threshold below which the frequency is set to the minimum value for the\n+                    | TRAFFIC policy. If the traffic rate is above this value and below the\n+                    | maximum value, the frequency is set to medium.\n+ **Type:**          integer\n+ **Values:**        | The number of packets below which the TRAFFIC policy applies the minimum\n+                    | frequency, or the medium frequency if between the average and maximum\n+                    | thresholds.\n+ **Required:**      Yes\n+ **Example:**       ``\"avg_packet_thresh\": 100000``\n+================== ===========================================================\n+\n+busy_hours\n+^^^^^^^^^^\n+\n+================== ===========================================================\n+ **Pair Name:**     \"busy_hours\"\n+================== ===========================================================\n+ **Description:**   The hours of the day in which we scale up the cores for busy times.\n+ **Type:**          array of integers\n+ **Values:**        An array with a list of hour values (0-23).\n+ **Required:**      For the TIME policy only.\n+ **Example:**       ``\"busy_hours\":[ 17, 18, 19, 20, 21, 22, 23 ]``\n+================== ===========================================================\n+\n+command\n+^^^^^^^\n+\n+================== ===========================================================\n+ **Pair Name:**     \"command\"\n+================== ===========================================================\n+ **Description:**   | The type of packet to send to the VM Power Manager. It is possible to create\n+                    | or destroy a policy or send a direct command to adjust the frequency of a core,\n+                    | as is possible on the command line interface.\n+ **Type:**          | string\n+ **Values:**        Possible values are:\n+\n+                    - CREATE: Create a new policy.\n+                    - DESTROY: Remove an existing policy.\n+                    - POWER: Send an immediate command, max, min, and so on.\n+\n+ **Required:**       Yes\n+ **Example:**        ``\"command\": \"CREATE\"``\n+================== ===========================================================\n+\n+core_list\n+^^^^^^^^^\n+\n+================== ===========================================================\n+ **Pair Name:**     \"core_list\"\n+================== ===========================================================\n+ **Description:**   The cores to which to apply a policy.\n+ **Type:**          array of integers\n+ **Values:**        An array with a list of virtual CPUs.\n+ **Required:**      For CREATE/DESTROY policy requests only.\n+ **Example:**       ``\"core_list\":[ 10, 11 ]``\n+================== ===========================================================\n+\n+mac_list\n+^^^^^^^^\n+\n+================== ===========================================================\n+ **Pair Name:**     \"mac_list\"\n+================== ===========================================================\n+ **Description:**   | When the policy is of type TRAFFIC, it is necessary to specify the MAC addresses\n+                    | that the host must monitor.\n+ **Type:**          | array of strings\n+ **Values:**        An array with a list of mac address strings.\n+ **Required:**      For TRAFFIC policy types only.\n+ **Example:**       ``\"mac_list\":[ \"de:ad:be:ef:01:01\",\"de:ad:be:ef:01:02\" ]``\n+================== ===========================================================\n+\n+\n+max_packet_thresh\n+^^^^^^^^^^^^^^^^^\n+\n+================== ===========================================================\n+ **Pair Name:**     \"max_packet_thresh\"\n+================== ===========================================================\n+ **Description:**   | In a policy of type TRAFFIC, the threshold value above which the frequency is set\n+                    | to a maximum.\n+ **Type:**          | integer\n+ **Values:**        | The number of packets per interval above which the TRAFFIC\n+                    | policy applies the maximum frequency.\n+ **Required:**      For the TRAFFIC policy only.\n+ **Example:**       ``\"max_packet_thresh\": 500000``\n+================== ===========================================================\n+\n+name\n+^^^^\n+\n+================== ===========================================================\n+ **Pair Name:**     \"name\"\n+================== ===========================================================\n+ **Description:**   | The name of the VM or host. Allows the parser to associate the policy with the\n+                    | relevant VM or host OS.\n+ **Type:**          | string\n+ **Values:**        Any valid string.\n+ **Required:**      Yes\n+ **Example:**       ``\"name\": \"ubuntu2\"``\n+================== ===========================================================\n+\n+policy_type\n+^^^^^^^^^^^\n+\n+================== ===========================================================\n+ **Pair Name:**     \"policy_type\"\n+================== ===========================================================\n+ **Description:**   | The type of policy to apply. See the ``--policy`` option description for more\n+                    | information.\n+ **Type:**          string\n+ **Values:**        Possible values are:\n+\n+                    - | TIME: Time-of-day policy. Scale the frequencies of the relevant cores up/down\n+                      | depending on busy and quiet hours.\n+                    - | TRAFFIC: Use statistics from the NIC and scale up and down accordingly.\n+                    - | WORKLOAD: Determine how heavily loaded the cores are and scale up and down\n+                      | accordingly.\n+                    - | BRANCH_RATIO: An out-of-band policy that looks at the ratio between branch\n+                      | hits and misses on a core and uses that information to determine how much\n+                      | packet processing a core is doing.\n+\n+ **Required:**       For ``CREATE`` and ``DESTROY`` policy requests only.\n+ **Example:**        ``\"policy_type\": \"TIME\"``\n+================== ===========================================================\n+\n+quiet_hours\n+^^^^^^^^^^^\n+\n+================== ===========================================================\n+ **Pair Name:**     \"quiet_hours\"\n+================== ===========================================================\n+ **Description:**   | The hours of the day to scale down the cores for quiet times.\n+ **Type:**          array of integers\n+ **Values:**        | An array with a list of hour numbers with values in the range 0 to 23.\n+ **Required:**      For the TIME policy only.\n+ **Example:**       ``\"quiet_hours\":[ 2, 3, 4, 5, 6 ]``\n+================== ===========================================================\n+\n+resource_id\n+^^^^^^^^^^^\n+\n+================== ===========================================================\n+ **Pair Name:**     \"resource_id\"\n+================== ===========================================================\n+ **Description:**   The core to which to apply a power command.\n+ **Type:**          integer\n+ **Values:**        A valid core ID for the VM or host OS.\n+ **Required:**      For the ``POWER`` instruction only.\n+ **Example:**       ``\"resource_id\": 10``\n+================== ===========================================================\n+\n+unit\n+^^^^\n+\n+================== ===========================================================\n+ **Pair Name:**     \"unit\"\n+================== ===========================================================\n+ **Description:**   The type of power operation to apply in the command.\n+ **Type:**          string\n+ **Values:**         - SCALE_MAX: Scale the frequency of this core to the maximum.\n+                     - SCALE_MIN: Scale the frequency of this core to the minimum.\n+                     - SCALE_UP: Scale up the frequency of this core.\n+                     - SCALE_DOWN: Scale down the frequency of this core.\n+                     - ENABLE_TURBO: Enable Intel® Turbo Boost Technology for this core.\n+                     - DISABLE_TURBO: Disable Intel® Turbo Boost Technology for this core.\n+ **Required:**      For the ``POWER`` instruction only.\n+ **Example:**       ``\"unit\": \"SCALE_MAX\"``\n+================== ===========================================================\n+\n+workload\n+^^^^^^^^\n+\n+================== ===========================================================\n+ **Pair Name:**     \"workload\"\n+================== ===========================================================\n+ **Description:**   In a policy of type WORKLOAD, it is necessary to specify\n+                    how heavy the workload is.\n+ **Type:**          string\n+ **Values:**         - HIGH: Scale the frequency of this core to maximum.\n+                     - MEDIUM: Scale the frequency of this core to minimum.\n+                     - LOW: Scale up the frequency of this core.\n+ **Required:**       For the ``WORKLOAD`` policy only.\n+ **Example:**        ``\"workload\": \"MEDIUM\"``\n+================== ===========================================================\n+\n",
    "prefixes": [
        "v1"
    ]
}