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GET /api/patches/131147/?format=api
http://patches.dpdk.org/api/patches/131147/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/patch/20230904092632.12675-1-mb@smartsharesystems.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": "<20230904092632.12675-1-mb@smartsharesystems.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20230904092632.12675-1-mb@smartsharesystems.com", "date": "2023-09-04T09:26:32", "name": "eal: add cache guard to per-lcore PRNG state", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": true, "hash": "748a13add278efe6c1d0e9b2bc03100709f3cc45", "submitter": { "id": 591, "url": "http://patches.dpdk.org/api/people/591/?format=api", "name": "Morten Brørup", "email": "mb@smartsharesystems.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/20230904092632.12675-1-mb@smartsharesystems.com/mbox/", "series": [ { "id": 29417, "url": "http://patches.dpdk.org/api/series/29417/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=29417", "date": "2023-09-04T09:26:32", "name": "eal: add cache guard to per-lcore PRNG state", "version": 1, "mbox": "http://patches.dpdk.org/series/29417/mbox/" } ], "comments": "http://patches.dpdk.org/api/patches/131147/comments/", "check": "fail", "checks": "http://patches.dpdk.org/api/patches/131147/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 035CC424EE;\n\tMon, 4 Sep 2023 11:26:36 +0200 (CEST)", "from mails.dpdk.org (localhost [127.0.0.1])\n\tby mails.dpdk.org (Postfix) with ESMTP id E5501402AF;\n\tMon, 4 Sep 2023 11:26:35 +0200 (CEST)", "from dkmailrelay1.smartsharesystems.com\n (smartserver.smartsharesystems.com [77.243.40.215])\n by mails.dpdk.org (Postfix) with ESMTP id 3B738400EF\n for <dev@dpdk.org>; Mon, 4 Sep 2023 11:26:35 +0200 (CEST)", "from smartserver.smartsharesystems.com\n (smartserver.smartsharesys.local [192.168.4.10])\n by dkmailrelay1.smartsharesystems.com (Postfix) with ESMTP id 112D42089E;\n Mon, 4 Sep 2023 11:26:35 +0200 (CEST)", "from dkrd2.smartsharesys.local ([192.168.4.12]) by\n smartserver.smartsharesystems.com with Microsoft SMTPSVC(6.0.3790.4675);\n Mon, 4 Sep 2023 11:26:33 +0200" ], "From": "=?utf-8?q?Morten_Br=C3=B8rup?= <mb@smartsharesystems.com>", "To": "thomas@monjalon.net, david.marchand@redhat.com,\n mattias.ronnblom@ericsson.com, bruce.richardson@intel.com", "Cc": "olivier.matz@6wind.com, andrew.rybchenko@oktetlabs.ru,\n honnappa.nagarahalli@arm.com, konstantin.v.ananyev@yandex.ru, dev@dpdk.org,\n\t=?utf-8?q?Morten_Br=C3=B8rup?= <mb@smartsharesystems.com>", "Subject": "[PATCH] eal: add cache guard to per-lcore PRNG state", "Date": "Mon, 4 Sep 2023 11:26:32 +0200", "Message-Id": "<20230904092632.12675-1-mb@smartsharesystems.com>", "X-Mailer": "git-send-email 2.17.1", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit", "X-OriginalArrivalTime": "04 Sep 2023 09:26:33.0540 (UTC)\n FILETIME=[E51C1040:01D9DF11]", "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" }, "content": "The per-lcore random state is frequently updated by their individual\nlcores, so add a cache guard to prevent CPU cache thrashing.\n\nDepends-on: series-29415 (\"clarify purpose of empty cache lines\")\n\nSigned-off-by: Morten Brørup <mb@smartsharesystems.com>\n---\n lib/eal/common/rte_random.c | 1 +\n 1 file changed, 1 insertion(+)", "diff": "diff --git a/lib/eal/common/rte_random.c b/lib/eal/common/rte_random.c\nindex 565f2401ce..3df0c7004a 100644\n--- a/lib/eal/common/rte_random.c\n+++ b/lib/eal/common/rte_random.c\n@@ -18,6 +18,7 @@ struct rte_rand_state {\n \tuint64_t z3;\n \tuint64_t z4;\n \tuint64_t z5;\n+\tRTE_CACHE_GUARD;\n } __rte_cache_aligned;\n \n /* One instance each for every lcore id-equipped thread, and one\n", "prefixes": [] }{ "id": 131147, "url": "