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GET /api/patches/49634/?format=api
{ "id": 49634, "url": "http://patches.dpdk.org/api/patches/49634/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/patch/20190110205538.24435-1-gage.eads@intel.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": "<20190110205538.24435-1-gage.eads@intel.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20190110205538.24435-1-gage.eads@intel.com", "date": "2019-01-10T20:55:35", "name": "[0/3] Add non-blocking stack mempool handler", "commit_ref": null, "pull_url": null, "state": null, "archived": false, "hash": null, "submitter": { "id": 586, "url": "http://patches.dpdk.org/api/people/586/?format=api", "name": "Eads, Gage", "email": "gage.eads@intel.com" }, "delegate": null, "mbox": "http://patches.dpdk.org/project/dpdk/patch/20190110205538.24435-1-gage.eads@intel.com/mbox/", "series": [], "comments": "http://patches.dpdk.org/api/patches/49634/comments/", "check": "pending", "checks": "http://patches.dpdk.org/api/patches/49634/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 81CF21B90A;\n\tThu, 10 Jan 2019 21:56:58 +0100 (CET)", "from mga06.intel.com (mga06.intel.com [134.134.136.31])\n\tby dpdk.org (Postfix) with ESMTP id 7A0701B8F9\n\tfor <dev@dpdk.org>; Thu, 10 Jan 2019 21:56:56 +0100 (CET)", "from fmsmga006.fm.intel.com ([10.253.24.20])\n\tby orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384;\n\t10 Jan 2019 12:56:54 -0800", "from txasoft-yocto.an.intel.com (HELO txasoft-yocto.an.intel.com.)\n\t([10.123.72.192])\n\tby fmsmga006.fm.intel.com with ESMTP; 10 Jan 2019 12:56:54 -0800" ], "X-Amp-Result": "SKIPPED(no attachment in message)", "X-Amp-File-Uploaded": "False", "X-ExtLoop1": "1", "X-IronPort-AV": "E=Sophos;i=\"5.56,462,1539673200\"; d=\"scan'208\";a=\"309379408\"", "From": "Gage Eads <gage.eads@intel.com>", "To": "dev@dpdk.org", "Cc": "olivier.matz@6wind.com, arybchenko@solarflare.com,\n\tbruce.richardson@intel.com, konstantin.ananyev@intel.com", "Date": "Thu, 10 Jan 2019 14:55:35 -0600", "Message-Id": "<20190110205538.24435-1-gage.eads@intel.com>", "X-Mailer": "git-send-email 2.13.6", "Subject": "[dpdk-dev] [PATCH 0/3] Add non-blocking stack mempool handler", "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": "For some users, the rte ring's \"non-preemptive\" constraint is not acceptable;\nfor example, if the application uses a mixture of pinned high-priority threads\nand multiplexed low-priority threads that share a mempool.\n\nThis patchset introduces a non-blocking stack mempool handler. Note that the\nnon-blocking algorithm relies on a 128-bit compare-and-swap, so it is limited\nto x86_64 machines.\n\nIn mempool_perf_autotest the lock-based stack outperforms the non-blocking\nhandler*, however:\n- For applications with preemptible pthreads, a lock-based stack's\n worst-case performance (i.e. one thread being preempted while\n holding the spinlock) is much worse than the non-blocking stack's.\n- Using per-thread mempool caches will largely mitigate the performance\n difference.\n\n*Test setup: x86_64 build with default config, dual-socket Xeon E5-2699 v4,\nrunning on isolcpus cores with a tickless scheduler. The lock-based stack's\nrate_persec was 1x-3.5x the non-blocking stack's.\n\nGage Eads (3):\n eal: add 128-bit cmpset (x86-64 only)\n mempool/nb_stack: add non-blocking stack mempool\n doc: add NB stack comment to EAL \"known issues\"\n\n MAINTAINERS | 4 +\n config/common_base | 1 +\n doc/guides/prog_guide/env_abstraction_layer.rst | 5 +\n drivers/mempool/Makefile | 1 +\n drivers/mempool/nb_stack/Makefile | 30 +++++\n drivers/mempool/nb_stack/meson.build | 4 +\n drivers/mempool/nb_stack/nb_lifo.h | 132 +++++++++++++++++++++\n drivers/mempool/nb_stack/rte_mempool_nb_stack.c | 125 +++++++++++++++++++\n .../nb_stack/rte_mempool_nb_stack_version.map | 4 +\n .../common/include/arch/x86/rte_atomic_64.h | 22 ++++\n mk/rte.app.mk | 1 +\n 11 files changed, 329 insertions(+)\n create mode 100644 drivers/mempool/nb_stack/Makefile\n create mode 100644 drivers/mempool/nb_stack/meson.build\n create mode 100644 drivers/mempool/nb_stack/nb_lifo.h\n create mode 100644 drivers/mempool/nb_stack/rte_mempool_nb_stack.c\n create mode 100644 drivers/mempool/nb_stack/rte_mempool_nb_stack_version.map", "diff": null, "prefixes": [ "0/3" ] }