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{
    "id": 49166,
    "url": "http://patches.dpdk.org/api/patches/49166/?format=api",
    "web_url": "http://patches.dpdk.org/project/dpdk/patch/20181220104246.5590-1-gavin.hu@arm.com/",
    "project": {
        "id": 1,
        "url": "http://patches.dpdk.org/api/projects/1/?format=api",
        "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",
        "webscm_url": "http://git.dpdk.org/dpdk",
        "list_archive_url": "https://inbox.dpdk.org/dev",
        "list_archive_url_format": "https://inbox.dpdk.org/dev/{}",
        "commit_url_format": ""
    },
    "msgid": "<20181220104246.5590-1-gavin.hu@arm.com>",
    "list_archive_url": "https://inbox.dpdk.org/dev/20181220104246.5590-1-gavin.hu@arm.com",
    "date": "2018-12-20T10:42:41",
    "name": "[v1,0/5] spinlock optimization and test case enhancements",
    "commit_ref": null,
    "pull_url": null,
    "state": null,
    "archived": false,
    "hash": null,
    "submitter": {
        "id": 1018,
        "url": "http://patches.dpdk.org/api/people/1018/?format=api",
        "name": "Gavin Hu",
        "email": "gavin.hu@arm.com"
    },
    "delegate": null,
    "mbox": "http://patches.dpdk.org/project/dpdk/patch/20181220104246.5590-1-gavin.hu@arm.com/mbox/",
    "series": [],
    "comments": "http://patches.dpdk.org/api/patches/49166/comments/",
    "check": "pending",
    "checks": "http://patches.dpdk.org/api/patches/49166/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "Return-Path": "<dev-bounces@dpdk.org>",
        "X-Original-To": "patchwork@dpdk.org",
        "Delivered-To": "patchwork@dpdk.org",
        "Received": [
            "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id D32181B9D6;\n\tThu, 20 Dec 2018 11:43:07 +0100 (CET)",
            "from foss.arm.com (foss.arm.com [217.140.101.70])\n\tby dpdk.org (Postfix) with ESMTP id 124AA1B96E\n\tfor <dev@dpdk.org>; Thu, 20 Dec 2018 11:43:06 +0100 (CET)",
            "from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249])\n\tby usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 5B65EA78;\n\tThu, 20 Dec 2018 02:43:05 -0800 (PST)",
            "from net-debian.shanghai.arm.com (net-debian.shanghai.arm.com\n\t[10.169.36.53])\n\tby usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id\n\tDB9B73F5C0; Thu, 20 Dec 2018 02:43:03 -0800 (PST)"
        ],
        "From": "Gavin Hu <gavin.hu@arm.com>",
        "To": "dev@dpdk.org",
        "Cc": "thomas@monjalon.net, jerinj@marvell.com, hemant.agrawal@nxp.com,\n\tbruce.richardson@intel.com, chaozhu@linux.vnet.ibm.com, nd@arm.com,\n\tHonnappa.Nagarahalli@arm.com, Gavin Hu <gavin.hu@arm.com>",
        "Date": "Thu, 20 Dec 2018 18:42:41 +0800",
        "Message-Id": "<20181220104246.5590-1-gavin.hu@arm.com>",
        "X-Mailer": "git-send-email 2.11.0",
        "Subject": "[dpdk-dev] [PATCH v1 0/5] spinlock optimization and test case\n\tenhancements",
        "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\t<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\t<mailto:dev-request@dpdk.org?subject=subscribe>",
        "Errors-To": "dev-bounces@dpdk.org",
        "Sender": "\"dev\" <dev-bounces@dpdk.org>"
    },
    "content": "V1:\n1. Remove the 1us delay outside of the locked region to really benchmark\n   the spinlock acquire/release performance, not the delay API.\n2. Use the precise version of getting timestamps for more precise\n   benchmarking results.\n3. Amortize the overhead of getting the timestamp by 10000 loops\n4. Move the arm specific implementation to arm folder to remove the\n   hardcoded implementation.\n5. Use atomic primitives, which translate to one-way barriers, instead of\n   two-way sync primitives, to optimize for performance.\n\nGavin Hu (5):\n  test/spinlock: remove 1us delay to create contention\n  test/spinlock: get timestamp more precisely\n  test/spinlock: amortize the cost of getting time\n  spinlock: move the implementation to arm specific file\n  spinlock: reimplement with atomic one-way barrier builtins\n\n .../common/include/arch/arm/rte_spinlock.h         | 28 +++++++++++++++++\n .../common/include/generic/rte_spinlock.h          | 28 +----------------\n test/test/test_spinlock.c                          | 35 +++++++++++-----------\n 3 files changed, 47 insertions(+), 44 deletions(-)",
    "diff": null,
    "prefixes": [
        "v1",
        "0/5"
    ]
}