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GET /api/patches/103222/?format=api
{ "id": 103222, "url": "http://patches.dpdk.org/api/patches/103222/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/patch/20211029082021.945586-4-feifei.wang2@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": "<20211029082021.945586-4-feifei.wang2@arm.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20211029082021.945586-4-feifei.wang2@arm.com", "date": "2021-10-29T08:20:19", "name": "[v8,3/5] eal: use wait event scheme for mcslock", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "445e31432e67c695abac0c2c13010a163f62d87d", "submitter": { "id": 1771, "url": "http://patches.dpdk.org/api/people/1771/?format=api", "name": "Feifei Wang", "email": "feifei.wang2@arm.com" }, "delegate": { "id": 24651, "url": "http://patches.dpdk.org/api/users/24651/?format=api", "username": "dmarchand", "first_name": "David", "last_name": "Marchand", "email": "david.marchand@redhat.com" }, "mbox": "http://patches.dpdk.org/project/dpdk/patch/20211029082021.945586-4-feifei.wang2@arm.com/mbox/", "series": [ { "id": 20120, "url": "http://patches.dpdk.org/api/series/20120/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=20120", "date": "2021-10-29T08:20:16", "name": "add new definitions for wait scheme", "version": 8, "mbox": "http://patches.dpdk.org/series/20120/mbox/" } ], "comments": "http://patches.dpdk.org/api/patches/103222/comments/", "check": "success", "checks": "http://patches.dpdk.org/api/patches/103222/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@inbox.dpdk.org", "Delivered-To": "patchwork@inbox.dpdk.org", "Received": [ "from mails.dpdk.org (mails.dpdk.org [217.70.189.124])\n\tby inbox.dpdk.org (Postfix) with ESMTP id C6DE6A0032;\n\tFri, 29 Oct 2021 10:20:51 +0200 (CEST)", "from [217.70.189.124] (localhost [127.0.0.1])\n\tby mails.dpdk.org (Postfix) with ESMTP id 6026941144;\n\tFri, 29 Oct 2021 10:20:44 +0200 (CEST)", "from foss.arm.com (foss.arm.com [217.140.110.172])\n by mails.dpdk.org (Postfix) with ESMTP id 5D6E241143\n for <dev@dpdk.org>; Fri, 29 Oct 2021 10:20:43 +0200 (CEST)", "from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14])\n by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E56A6ED1;\n Fri, 29 Oct 2021 01:20:42 -0700 (PDT)", "from net-x86-dell-8268.shanghai.arm.com\n (net-x86-dell-8268.shanghai.arm.com [10.169.210.102])\n by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 8125A3F5A1;\n Fri, 29 Oct 2021 01:20:39 -0700 (PDT)" ], "From": "Feifei Wang <feifei.wang2@arm.com>", "To": "Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>", "Cc": "dev@dpdk.org, nd@arm.com, jerinjacobk@gmail.com,\n stephen@networkplumber.org, david.marchand@redhat.com, thomas@monjalon.net,\n mattias.ronnblom@ericsson.com, konstantin.ananyev@intel.com,\n Feifei Wang <feifei.wang2@arm.com>, Ruifeng Wang <ruifeng.wang@arm.com>", "Date": "Fri, 29 Oct 2021 16:20:19 +0800", "Message-Id": "<20211029082021.945586-4-feifei.wang2@arm.com>", "X-Mailer": "git-send-email 2.25.1", "In-Reply-To": "<20211029082021.945586-1-feifei.wang2@arm.com>", "References": "<20210902053253.3017858-1-feifei.wang2@arm.com>\n <20211029082021.945586-1-feifei.wang2@arm.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[dpdk-dev] [PATCH v8 3/5] eal: use wait event scheme for mcslock", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.29", "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": "Instead of polling for mcslock to be updated, use wait event scheme\nfor this case.\n\nSigned-off-by: Feifei Wang <feifei.wang2@arm.com>\nReviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>\n---\n lib/eal/include/generic/rte_mcslock.h | 5 +++--\n 1 file changed, 3 insertions(+), 2 deletions(-)", "diff": "diff --git a/lib/eal/include/generic/rte_mcslock.h b/lib/eal/include/generic/rte_mcslock.h\nindex 34f33c64a5..b4e07648ff 100644\n--- a/lib/eal/include/generic/rte_mcslock.h\n+++ b/lib/eal/include/generic/rte_mcslock.h\n@@ -116,8 +116,9 @@ rte_mcslock_unlock(rte_mcslock_t **msl, rte_mcslock_t *me)\n \t\t/* More nodes added to the queue by other CPUs.\n \t\t * Wait until the next pointer is set.\n \t\t */\n-\t\twhile (__atomic_load_n(&me->next, __ATOMIC_RELAXED) == NULL)\n-\t\t\trte_pause();\n+\t\tuintptr_t *next;\n+\t\tnext = (uintptr_t *)&me->next;\n+\t\trte_wait_event(next, UINTPTR_MAX, ==, 0, __ATOMIC_RELAXED);\n \t}\n \n \t/* Pass lock to next waiter. */\n", "prefixes": [ "v8", "3/5" ] }