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 X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=ham 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 1D693C43381 for ; Thu, 7 Mar 2019 17:46:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E317A20851 for ; Thu, 7 Mar 2019 17:46:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551980785; bh=K9lgsUsrch1owE910fjj47RGNpvQwwnJUMZMl4n+5UM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=nR8SH259xYGV4KuOlvc55yTtn/80xKFLc1IsOOQ0rRGA+dz8kV0QhLx3qW9pR4aO0 HSt8hPuSd9KnLN8HP5KVWqzhaE0Iibm4LfHeC2/8CkvXf3J2DsPNSGKhwUkkrVi28r VCG7u8IYU5Gj/eR3DlLR2UpxMnnBV8XsCYFj1jMs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726766AbfCGRqX (ORCPT ); Thu, 7 Mar 2019 12:46:23 -0500 Received: from mail.kernel.org ([198.145.29.99]:38786 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726477AbfCGRqV (ORCPT ); Thu, 7 Mar 2019 12:46:21 -0500 Received: from quaco.ghostprotocols.net (unknown [190.15.121.82]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 151F621019; Thu, 7 Mar 2019 17:46:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551980780; bh=K9lgsUsrch1owE910fjj47RGNpvQwwnJUMZMl4n+5UM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Tig1vTdZYC0rEL/Chx63UWIvvs4uRQklxUcQ4ef5rZR2raUQtuoQSwhxdj9sB4y7T Q3Cl+ozqCT3VC1jDZn8RJVJiv1xw+X1O6qL2h6ieNnJr6zL/4y8W9EY4ob5iAGRdAf guJtDvZ1Xod4YOzbspg1zhlV4gv/nRBHGP0WEuzU= From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: Jiri Olsa , Namhyung Kim , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Jin Yao , Alexander Shishkin , Andi Kleen , Jin Yao , Kan Liang , Peter Zijlstra , Arnaldo Carvalho de Melo Subject: [PATCH 22/35] perf diff: Support --cpu filter option Date: Thu, 7 Mar 2019 14:44:20 -0300 Message-Id: <20190307174433.28819-23-acme@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190307174433.28819-1-acme@kernel.org> References: <20190307174433.28819-1-acme@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jin Yao To improve 'perf diff', implement a --cpu filter option. Multiple CPUs can be provided as a comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2. Default is to report samples on all CPUs. For example, perf diff --cpu 0,1 It only diff the samples for CPU0 and CPU1. Signed-off-by: Jin Yao Acked-by: Jiri Olsa Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jin Yao Cc: Kan Liang Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1551791143-10334-3-git-send-email-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-diff.txt | 5 +++++ tools/perf/builtin-diff.c | 16 ++++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt index 036d65bded51..8c2c229faf50 100644 --- a/tools/perf/Documentation/perf-diff.txt +++ b/tools/perf/Documentation/perf-diff.txt @@ -163,6 +163,11 @@ OPTIONS the end of perf.data.old and analyzes the perf.data from the timestamp 3971.150589 to the end of perf.data. +--cpu:: Only diff samples for the list of CPUs provided. Multiple CPUs can + be provided as a comma-separated list with no space: 0,1. Ranges of + CPUs are specified with -: 0-2. Default is to report samples on all + CPUs. + COMPARISON ---------- The comparison is governed by the baseline file. The baseline perf.data diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c index 17cd898074c8..dfe6c7606f5a 100644 --- a/tools/perf/builtin-diff.c +++ b/tools/perf/builtin-diff.c @@ -83,6 +83,9 @@ static unsigned int sort_compute = 1; static s64 compute_wdiff_w1; static s64 compute_wdiff_w2; +static const char *cpu_list; +static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS); + enum { COMPUTE_DELTA, COMPUTE_RATIO, @@ -354,6 +357,11 @@ static int diff__process_sample_event(struct perf_tool *tool, return -1; } + if (cpu_list && !test_bit(sample->cpu, cpu_bitmap)) { + ret = 0; + goto out_put; + } + if (!hists__add_entry(hists, &al, NULL, NULL, NULL, sample, true)) { pr_warning("problem incrementing symbol period, skipping event\n"); goto out_put; @@ -892,6 +900,13 @@ static int __cmd_diff(void) goto out_delete; } + if (cpu_list) { + ret = perf_session__cpu_bitmap(d->session, cpu_list, + cpu_bitmap); + if (ret < 0) + goto out_delete; + } + ret = perf_session__process_events(d->session); if (ret) { pr_err("Failed to process %s\n", d->data.path); @@ -969,6 +984,7 @@ static const struct option options[] = { "How to display percentage of filtered entries", parse_filter_percentage), OPT_STRING(0, "time", &pdiff.time_str, "str", "Time span (time percent or absolute timestamp)"), + OPT_STRING(0, "cpu", &cpu_list, "cpu", "list of cpus to profile"), OPT_END() }; -- 2.20.1