| Message ID | 1625142402-64945-1-git-send-email-linyunsheng@huawei.com |
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| Headers | show
Return-Path: <netdev-owner@kernel.org> X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 559DFC11F67 for <netdev@archiver.kernel.org>; Thu, 1 Jul 2021 12:27:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2907861402 for <netdev@archiver.kernel.org>; Thu, 1 Jul 2021 12:27:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236505AbhGAM35 (ORCPT <rfc822;netdev@archiver.kernel.org>); Thu, 1 Jul 2021 08:29:57 -0400 Received: from szxga03-in.huawei.com ([45.249.212.189]:9333 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236424AbhGAM3w (ORCPT <rfc822;netdev@vger.kernel.org>); Thu, 1 Jul 2021 08:29:52 -0400 Received: from dggemv704-chm.china.huawei.com (unknown [172.30.72.54]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4GFy6F1zwPz74K4; Thu, 1 Jul 2021 20:23:01 +0800 (CST) Received: from dggpemm500005.china.huawei.com (7.185.36.74) by dggemv704-chm.china.huawei.com (10.3.19.47) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Thu, 1 Jul 2021 20:27:14 +0800 Received: from localhost.localdomain (10.69.192.56) by dggpemm500005.china.huawei.com (7.185.36.74) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Thu, 1 Jul 2021 20:27:14 +0800 From: Yunsheng Lin <linyunsheng@huawei.com> To: <davem@davemloft.net>, <kuba@kernel.org>, <jasowang@redhat.com>, <mst@redhat.com> CC: <brouer@redhat.com>, <paulmck@kernel.org>, <peterz@infradead.org>, <will@kernel.org>, <shuah@kernel.org>, <linux-kernel@vger.kernel.org>, <netdev@vger.kernel.org>, <linux-kselftest@vger.kernel.org>, <linuxarm@openeuler.org> Subject: [PATCH net-next v3 0/3] add benchmark selftest and optimization for ptr_ring Date: Thu, 1 Jul 2021 20:26:39 +0800 Message-ID: <1625142402-64945-1-git-send-email-linyunsheng@huawei.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.69.192.56] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To dggpemm500005.china.huawei.com (7.185.36.74) X-CFilter-Loop: Reflected Precedence: bulk List-ID: <netdev.vger.kernel.org> X-Mailing-List: netdev@vger.kernel.org |
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add benchmark selftest and optimization for ptr_ring
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Patch 1: add a selftest app to benchmark the performance of ptr_ring. Patch 2: move r->queue[] clearing after r->consumer_head updating. Patch 3: add barrier to ensure the visiblity of r->queue[]. V3: add patch 3 and address most of Michael's comment. V2: add patch 1 and add performance data for patch 2. --- Performance raw data using "perf stat -r" cmd, comparison is also done in patch 2/3. ptr_ring_test_org: patch 1 ptr_ring_test_opt1: patch 1 + patch 2 ptr_ring_test_opt2: patch 1 + patch 2 + patch 3 x86_64(as there is other workload in the x86_64 system, so run 1000 times to get more accurate result): Performance counter stats for './ptr_ring_test_org -s 1000 -m 1 -N 100000000' (1000 runs): 5,291.83 msec task-clock # 1.994 CPUs utilized ( +- 0.41% ) 690 context-switches # 0.130 K/sec ( +- 3.65% ) 8 cpu-migrations # 0.002 K/sec ( +- 5.70% ) 291 page-faults # 0.055 K/sec ( +- 0.05% ) 12,660,040,758 cycles # 2.392 GHz ( +- 0.41% ) 24,202,160,722 instructions # 1.91 insn per cycle ( +- 0.06% ) 3,559,123,597 branches # 672.569 M/sec ( +- 0.07% ) 8,009,010 branch-misses # 0.23% of all branches ( +- 0.11% ) 2.6538 +- 0.0109 seconds time elapsed ( +- 0.41% ) Performance counter stats for './ptr_ring_test_opt1 -s 1000 -m 1 -N 100000000' (1000 runs): 5,064.95 msec task-clock # 1.992 CPUs utilized ( +- 0.55% ) 668 context-switches # 0.132 K/sec ( +- 4.20% ) 9 cpu-migrations # 0.002 K/sec ( +- 4.45% ) 291 page-faults # 0.057 K/sec ( +- 0.06% ) 12,117,262,182 cycles # 2.392 GHz ( +- 0.55% ) 22,586,035,716 instructions # 1.86 insn per cycle ( +- 0.08% ) 3,404,652,345 branches # 672.199 M/sec ( +- 0.10% ) 7,864,190 branch-misses # 0.23% of all branches ( +- 0.16% ) 2.5422 +- 0.0142 seconds time elapsed ( +- 0.56% ) Performance counter stats for './ptr_ring_test_opt2 -s 1000 -m 1 -N 100000000' (1000 runs): 5,105.33 msec task-clock # 1.995 CPUs utilized ( +- 0.47% ) 589 context-switches # 0.115 K/sec ( +- 4.24% ) 11 cpu-migrations # 0.002 K/sec ( +- 4.24% ) 292 page-faults # 0.057 K/sec ( +- 0.04% ) 12,214,160,307 cycles # 2.392 GHz ( +- 0.47% ) 22,756,292,370 instructions # 1.86 insn per cycle ( +- 0.10% ) 3,429,218,233 branches # 671.694 M/sec ( +- 0.12% ) 7,921,984 branch-misses # 0.23% of all branches ( +- 0.15% ) 2.5587 +- 0.0122 seconds time elapsed ( +- 0.47% ) ------------------------------------------------------------------------------------------------- arm64(using taskset to avoid the numa effects): Performance counter stats for 'taskset -c 0-1 ./ptr_ring_test_org -s 1000 -m 1 -N 100000000' (100 runs): 4172.83 msec task-clock # 1.999 CPUs utilized ( +- 0.01% ) 54 context-switches # 0.013 K/sec ( +- 0.29% ) 1 cpu-migrations # 0.000 K/sec 115 page-faults # 0.028 K/sec ( +- 0.16% ) 10848085945 cycles # 2.600 GHz ( +- 0.01% ) 25808501369 instructions # 2.38 insn per cycle ( +- 0.00% ) <not supported> branches 11190266 branch-misses ( +- 0.02% ) 2.087205 +- 0.000130 seconds time elapsed ( +- 0.01% ) Performance counter stats for 'taskset -c 0-1 ./ptr_ring_test_opt1 -s 1000 -m 1 -N 100000000' (100 runs): 3774.91 msec task-clock # 1.999 CPUs utilized ( +- 0.03% ) 50 context-switches # 0.013 K/sec ( +- 0.36% ) 1 cpu-migrations # 0.000 K/sec 114 page-faults # 0.030 K/sec ( +- 0.15% ) 9813658996 cycles # 2.600 GHz ( +- 0.03% ) 23920189000 instructions # 2.44 insn per cycle ( +- 0.01% ) <not supported> branches 10018927 branch-misses ( +- 0.04% ) 1.888224 +- 0.000541 seconds time elapsed ( +- 0.03% ) Performance counter stats for 'taskset -c 0-1 ./ptr_ring_test_opt2 -s 1000 -m 1 -N 100000000' (100 runs): 3785.79 msec task-clock # 1.999 CPUs utilized ( +- 0.03% ) 49 context-switches # 0.013 K/sec ( +- 0.32% ) 1 cpu-migrations # 0.000 K/sec 114 page-faults # 0.030 K/sec ( +- 0.15% ) 9842067534 cycles # 2.600 GHz ( +- 0.03% ) 24074397270 instructions # 2.45 insn per cycle ( +- 0.01% ) <not supported> branches 10091918 branch-misses ( +- 0.04% ) 1.893673 +- 0.000508 seconds time elapsed ( +- 0.03% ) Yunsheng Lin (3): selftests/ptr_ring: add benchmark application for ptr_ring ptr_ring: move r->queue[] clearing after r->consumer_head updating ptr_ring: add barrier to ensure the visiblity of r->queue[] MAINTAINERS | 5 + include/linux/ptr_ring.h | 52 ++++-- tools/testing/selftests/ptr_ring/Makefile | 6 + tools/testing/selftests/ptr_ring/ptr_ring_test.c | 224 +++++++++++++++++++++++ tools/testing/selftests/ptr_ring/ptr_ring_test.h | 130 +++++++++++++ 5 files changed, 399 insertions(+), 18 deletions(-) create mode 100644 tools/testing/selftests/ptr_ring/Makefile create mode 100644 tools/testing/selftests/ptr_ring/ptr_ring_test.c create mode 100644 tools/testing/selftests/ptr_ring/ptr_ring_test.h