From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C84EBC0015E for ; Sat, 15 Jul 2023 03:31:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230081AbjGODbk (ORCPT ); Fri, 14 Jul 2023 23:31:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33214 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229572AbjGODbf (ORCPT ); Fri, 14 Jul 2023 23:31:35 -0400 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B21D33A97; Fri, 14 Jul 2023 20:31:33 -0700 (PDT) Received: from kwepemm600003.china.huawei.com (unknown [172.30.72.57]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4R2v1m3vqZzNm8K; Sat, 15 Jul 2023 11:28:12 +0800 (CST) Received: from localhost.localdomain (10.67.174.95) by kwepemm600003.china.huawei.com (7.193.23.202) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Sat, 15 Jul 2023 11:31:29 +0800 From: Yang Jihong To: , , , , , , , , , , , , , , , CC: Subject: [PATCH v2 0/7] perf record: Track sideband events for all CPUs when tracing selected CPUs Date: Sat, 15 Jul 2023 03:29:08 +0000 Message-ID: <20230715032915.97146-1-yangjihong1@huawei.com> X-Mailer: git-send-email 2.30.GIT MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.67.174.95] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To kwepemm600003.china.huawei.com (7.193.23.202) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org User space tasks can migrate between CPUs, track sideband events for all CPUs. The specific scenarios are as follows: CPU0 CPU1 perf record -C 0 start taskA starts to be created and executed -> PERF_RECORD_COMM and PERF_RECORD_MMAP events only deliver to CPU1 ...... | migrate to CPU0 | Running on CPU0 <----------/ ... perf record -C 0 stop Now perf samples the PC of taskA. However, perf does not record the PERF_RECORD_COMM and PERF_RECORD_COMM events of taskA. Therefore, the comm and symbols of taskA cannot be parsed. The sys_perf_event_open invoked is as follows: # perf --debug verbose=3 record -e cpu-clock -C 1 true Opening: cpu-clock ------------------------------------------------------------ perf_event_attr: type 1 size 136 { sample_period, sample_freq } 4000 sample_type IP|TID|TIME|ID|CPU|PERIOD read_format ID|LOST disabled 1 inherit 1 freq 1 sample_id_all 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid -1 cpu 1 group_fd -1 flags 0x8 = 5 Opening: dummy:HG ------------------------------------------------------------ perf_event_attr: type 1 size 136 config 0x9 { sample_period, sample_freq } 1 sample_type IP|TID|TIME|CPU|IDENTIFIER read_format ID|LOST inherit 1 exclude_kernel 1 exclude_hv 1 mmap 1 comm 1 task 1 sample_id_all 1 exclude_guest 1 mmap2 1 comm_exec 1 ksymbol 1 bpf_event 1 ------------------------------------------------------------ sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 6 sys_perf_event_open: pid -1 cpu 1 group_fd -1 flags 0x8 = 7 sys_perf_event_open: pid -1 cpu 2 group_fd -1 flags 0x8 = 9 sys_perf_event_open: pid -1 cpu 3 group_fd -1 flags 0x8 = 10 sys_perf_event_open: pid -1 cpu 4 group_fd -1 flags 0x8 = 11 sys_perf_event_open: pid -1 cpu 5 group_fd -1 flags 0x8 = 12 sys_perf_event_open: pid -1 cpu 6 group_fd -1 flags 0x8 = 13 sys_perf_event_open: pid -1 cpu 7 group_fd -1 flags 0x8 = 14 Changes since v1: - Add perf_evlist__go_system_wide() via internal/evlist.h instead of exporting perf_evlist__propagate_maps(). - Use evlist__add_aux_dummy() instead of evlist__add_dummy() in evlist__findnew_tracking_event(). - Add a parameter in evlist__findnew_tracking_event() to deal with system_wide inside. - Add sideband for all CPUs when tracing selected CPUs comments on the perf record man page. - Use "sideband events" instead of "tracking events". - Adjust the patches Sequence. - Add patch5 to skip dummy event sample_type check for evlist_config. - Add patch6 to update system-wide-dummy attr values for perf test. Yang Jihong (7): perf evlist: Add perf_evlist__go_system_wide() helper perf evlist: Add evlist__findnew_tracking_event() helper perf record: Move setting dummy tracking before record__init_thread_masks() perf record: Track sideband events for all CPUs when tracing selected CPUs perf evlist: Skip dummy event sample_type check for evlist_config perf test: Update system-wide-dummy attr expected values perf test: Add test case for record sideband events tools/lib/perf/evlist.c | 9 +++ tools/lib/perf/include/internal/evlist.h | 2 + tools/perf/Documentation/perf-record.txt | 3 + tools/perf/builtin-record.c | 69 ++++++++++++++--------- tools/perf/tests/attr/system-wide-dummy | 12 ++-- tools/perf/tests/shell/record_tracking.sh | 44 +++++++++++++++ tools/perf/util/evlist.c | 18 ++++++ tools/perf/util/evlist.h | 1 + tools/perf/util/record.c | 7 +++ 9 files changed, 132 insertions(+), 33 deletions(-) create mode 100755 tools/perf/tests/shell/record_tracking.sh -- 2.30.GIT