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 804A3EB64DD for ; Tue, 4 Jul 2023 07:44:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231518AbjGDHos (ORCPT ); Tue, 4 Jul 2023 03:44:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55258 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229793AbjGDHob (ORCPT ); Tue, 4 Jul 2023 03:44:31 -0400 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4F1F910C2; Tue, 4 Jul 2023 00:44:24 -0700 (PDT) Received: from kwepemm600003.china.huawei.com (unknown [172.30.72.57]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4QwFCC3Jd3zTmR6; Tue, 4 Jul 2023 15:43:19 +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; Tue, 4 Jul 2023 15:44:19 +0800 From: Yang Jihong To: , , , , , , , , , , , CC: Subject: [PATCH 0/5] perf record: Tracking side-band events for all CPUs when tracing selected CPUs Date: Tue, 4 Jul 2023 07:42:12 +0000 Message-ID: <20230704074217.240939-1-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: dggems704-chm.china.huawei.com (10.3.19.181) 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, we need to track side-band 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 } 4000 sample_type IP|TID|TIME|ID|CPU|PERIOD read_format ID|LOST inherit 1 mmap 1 comm 1 freq 1 task 1 sample_id_all 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 1. patch1 and patch2 are pre-patch and are used to provide two helpers. One is used to modify cpu_maps, and the other is used to search for dummy tracking evsel in the evlist. 2. patch3 is the main patch, track side-band events for all CPUs when tracing selected CPUs 3. patch4 adds the corresponding test case. 4. patch5 is code optimization. Yang Jihong (5): perf evlist: Export perf_evlist__propagate_maps() perf evlist: Add evlist__findnew_tracking_event() helper perf record: Tracking side-band events for all CPUs when tracing selected CPUs perf test: Add test case for record tracking perf record: All config tracking are integrated into record__config_tracking_events() tools/lib/perf/evlist.c | 23 +++---- tools/lib/perf/include/perf/evlist.h | 2 + tools/perf/builtin-record.c | 74 ++++++++++++++--------- tools/perf/tests/shell/record_tracking.sh | 44 ++++++++++++++ tools/perf/util/evlist.c | 17 ++++++ tools/perf/util/evlist.h | 1 + 6 files changed, 120 insertions(+), 41 deletions(-) create mode 100755 tools/perf/tests/shell/record_tracking.sh -- 2.30.GIT