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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 19ED3C4332F for ; Mon, 25 Oct 2021 20:00:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EE84760E8F for ; Mon, 25 Oct 2021 20:00:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240148AbhJYUCf (ORCPT ); Mon, 25 Oct 2021 16:02:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:42724 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239591AbhJYT5R (ORCPT ); Mon, 25 Oct 2021 15:57:17 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7C825611C4; Mon, 25 Oct 2021 19:47:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1635191222; bh=m3sAFKsl04frEcNvAT8NnlptnPwULFmfs6QJVsGkHvo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g0lQ+4P3AfdihqJRJnFncfuVyOkLwkGLItAAv9ZFLd0+Co2WOlFaKx3/PFC54g2Bb I1xYjcHWAZ8GnKzkFAEUJSwMx3HvMdZ3dlf4SAppzJ5chLB/xBqCdkHHL886dHUj8d ecyKyE37ncgMOVeCWaA7NLaH5bs6fjcnFBUvWQsw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Shunsuke Nakamura , Alexander Shishkin , Jiri Olsa , Mark Rutland , Namhyung Kim , Peter Zijlstra , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH 5.14 145/169] libperf tests: Fix test_stat_cpu Date: Mon, 25 Oct 2021 21:15:26 +0200 Message-Id: <20211025191035.935347739@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211025191017.756020307@linuxfoundation.org> References: <20211025191017.756020307@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Shunsuke Nakamura [ Upstream commit 3ff6d64e68abc231955d216236615918797614ae ] The `cpu` argument of perf_evsel__read() must specify the cpu index. perf_cpu_map__for_each_cpu() is for iterating the cpu number (not index) and is thus not appropriate for use with perf_evsel__read(). So, if there is an offline CPU, the cpu number specified in the argument may point out of range because the cpu number and the cpu index are different. Fix test_stat_cpu(). Testing it: # make tests -C tools/lib/perf/ make: Entering directory '/home/nakamura/kernel_src/linux-5.15-rc4_fix/tools/lib/perf' running static: - running tests/test-cpumap.c...OK - running tests/test-threadmap.c...OK - running tests/test-evlist.c...OK - running tests/test-evsel.c...OK running dynamic: - running tests/test-cpumap.c...OK - running tests/test-threadmap.c...OK - running tests/test-evlist.c...OK - running tests/test-evsel.c...OK make: Leaving directory '/home/nakamura/kernel_src/linux-5.15-rc4_fix/tools/lib/perf' Signed-off-by: Shunsuke Nakamura Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20211011083704.4108720-1-nakamura.shun@fujitsu.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/lib/perf/tests/test-evlist.c | 6 +++--- tools/lib/perf/tests/test-evsel.c | 6 +++--- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/tools/lib/perf/tests/test-evlist.c b/tools/lib/perf/tests/test-evlist.c index c67c83399170..ce91a582f0e4 100644 --- a/tools/lib/perf/tests/test-evlist.c +++ b/tools/lib/perf/tests/test-evlist.c @@ -40,7 +40,7 @@ static int test_stat_cpu(void) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK, }; - int err, cpu, tmp; + int err, idx; cpus = perf_cpu_map__new(NULL); __T("failed to create cpus", cpus); @@ -70,10 +70,10 @@ static int test_stat_cpu(void) perf_evlist__for_each_evsel(evlist, evsel) { cpus = perf_evsel__cpus(evsel); - perf_cpu_map__for_each_cpu(cpu, tmp, cpus) { + for (idx = 0; idx < perf_cpu_map__nr(cpus); idx++) { struct perf_counts_values counts = { .val = 0 }; - perf_evsel__read(evsel, cpu, 0, &counts); + perf_evsel__read(evsel, idx, 0, &counts); __T("failed to read value for evsel", counts.val != 0); } } diff --git a/tools/lib/perf/tests/test-evsel.c b/tools/lib/perf/tests/test-evsel.c index 9abd4c0bf6db..33ae9334861a 100644 --- a/tools/lib/perf/tests/test-evsel.c +++ b/tools/lib/perf/tests/test-evsel.c @@ -22,7 +22,7 @@ static int test_stat_cpu(void) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_CLOCK, }; - int err, cpu, tmp; + int err, idx; cpus = perf_cpu_map__new(NULL); __T("failed to create cpus", cpus); @@ -33,10 +33,10 @@ static int test_stat_cpu(void) err = perf_evsel__open(evsel, cpus, NULL); __T("failed to open evsel", err == 0); - perf_cpu_map__for_each_cpu(cpu, tmp, cpus) { + for (idx = 0; idx < perf_cpu_map__nr(cpus); idx++) { struct perf_counts_values counts = { .val = 0 }; - perf_evsel__read(evsel, cpu, 0, &counts); + perf_evsel__read(evsel, idx, 0, &counts); __T("failed to read value for evsel", counts.val != 0); } -- 2.33.0