From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 817002D5923; Mon, 14 Sep 2026 01:36:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789349779; cv=none; b=b9SyrXX1upicHsdxQE7qY6tVuI1enZGObg/o/AzvBZeLQkHwR1+7gja7Jt/2F2ahVkPCvLyia7378Bpr8/DI1uLje8um5rVqTpo0Y3A+aYtAhQDRLeTnB82uOtavrQ+45gqWGf7U9zGKxaVSkCmRxC4Awqps0uXmIA7kZ772xXw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789349779; c=relaxed/simple; bh=V56pcjVbjnrgiT4Lt3i6Nlu4CZC5Vrc81Cs1aDymu7k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Jr4GLVJlUuLaULmb14brZ3GheYfo00RUijaLhcFxyCjQ+c45IzEyfwPGPxPK3iua7gjfDyoDBGl+zDeqXLw2AJwCWuFypBD5suJ/QBMw5wR9J+Lbrqd63pkfdhbN/uBVu8qx/tzJnbk+X9c2N/G/LsSCcQ66vMzew8jAlRt/edc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=N4G4UiJa; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="N4G4UiJa" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 313371F00893; Mon, 14 Sep 2026 01:36:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789349778; bh=40PpvyNz+FTvCz0PJ/eeZnY/X6I0+eLUGCvJDO1X3XQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=N4G4UiJay3I9oyymLKLGsHD0Gw6MyPts/K8UDV4vg+vWzFPT28IcUO7d+zL2q4M5h Sp73Y+tD8Cv+JPzZt1paCoVtAhjbdRFldrn37TtYps22znaTpA8G70kF7e0R40B+x5 4MBpA38qGeePoDd88CjXdmKe3/BZQYcHChfVxIIa+aJqOfvczMXGLFwER12kjv8CAU 1UCRe9fWB3XASHq2Y2MC+BisgUv1a0z94e0YAkD8D5GJeqI9FnPGC+DDkPai8zIkGB yNm6m6JLPU6k94NwNaEE5GGbFZVfI49ZNkDuCF1Vqt76ozVCjhLQuqUVPwvgzXy/aU PlpNiMuhM/D8Q== From: Arnaldo Carvalho de Melo To: Namhyung Kim Cc: Ingo Molnar , Thomas Gleixner , James Clark , Jiri Olsa , Ian Rogers , Adrian Hunter , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Arnaldo Carvalho de Melo Subject: [PATCH 1/8] perf test: Skip data_type_profiling when the PMU cannot record memory events Date: Sun, 13 Sep 2026 22:35:56 -0300 Message-ID: <20260914013604.7702-2-acme@kernel.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260914013604.7702-1-acme@kernel.org> References: <20260914013604.7702-1-acme@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Arnaldo Carvalho de Melo The test records with 'perf mem record' in per-thread mode and its only guard matches one specific message: perf mem record -o /dev/null -- true 2>&1 | \ grep -q "failed: no PMU supports the memory events" && exit 2 A PMU that has memory events but refuses them per-thread falls through it, and AMD IBS does: $ perf mem record -o /dev/null -- true Error: Failure to open event 'ibs_op/ldlat=0/u' on PMU 'ibs_op' which will be removed. Invalid event (ibs_op/ldlat=0/u) in per-thread mode, enable system wide with '-a'. Error: Failure to open any events for recording. What follows is not a skip either. The script runs under 'set -e', so the bare 'perf mem record' in test_basic_annotate() aborts it through the EXIT trap, which reports a signal that never happened and exits 1: Basic Rust perf annotate test Unexpected signal in test_basic_annotate so 'perf test' turns "this PMU cannot record these events" into a test failure: $ perf test "data type profiling" 87: perf data type profiling tests : FAILED! The 'if [ "x$?" != "x0" ]' right below the record was meant to report "[Failed: perf record]" and carry on with the other cases, but under 'set -e' it is dead code: the shell is gone before it is reached. The same goes for the 'perf annotate' call below it. Skip when a trivial per-thread 'perf mem record' fails, and put both commands in the condition of an 'if', where 'set -e' leaves them alone, so that the reporting works for the cases where only one workload cannot be recorded or annotated: $ perf test "data type profiling" 87: perf data type profiling tests : Skip and, with just the new skip guard disabled on the same box, every case reports its failure instead of the first one aborting the run: Basic Rust perf annotate test Basic annotate [Failed: perf record] Pipe Rust perf annotate test Pipe annotate [Failed: perf record] Basic C perf annotate test Basic annotate [Failed: perf record] Pipe C perf annotate test Pipe annotate [Failed: perf record] Assisted-by: LLM Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/tests/shell/data_type_profiling.sh | 46 +++++++++++++++---- 1 file changed, 36 insertions(+), 10 deletions(-) diff --git a/tools/perf/tests/shell/data_type_profiling.sh b/tools/perf/tests/shell/data_type_profiling.sh index eca694600a0478d2..a916c410274aa888 100755 --- a/tools/perf/tests/shell/data_type_profiling.sh +++ b/tools/perf/tests/shell/data_type_profiling.sh @@ -19,6 +19,15 @@ perfout=$(mktemp /tmp/__perf_test.perf.out.XXXXX) perf mem record -o /dev/null -- true 2>&1 | \ grep -q "failed: no PMU supports the memory events" && exit 2 +# Skip if per-thread mem record is not supported on this PMU (e.g. AMD IBS +# needs system-wide '-a'): it is what the test records with below, and a +# failing record must not be reported as a test failure. +if ! perf mem record -o /dev/null -- true 2>/dev/null +then + echo "Skip: cannot record memory events on this PMU" + exit 2 +fi + cleanup() { rm -rf "${perfdata}" "${perfout}" rm -rf "${perfdata}".old @@ -52,25 +61,42 @@ test_basic_annotate() { index=1 ;; esac + # Under 'set -e' a bare failing command aborts the script through the EXIT + # trap, so the commands that report a failure have to be the condition of + # an 'if' for that reporting to ever happen. if [ "x${mode}" == "xBasic" ] then - perf mem record -o "${perfdata}" ${testprogs[$index]} 2> /dev/null + if ! perf mem record -o "${perfdata}" ${testprogs[$index]} 2> /dev/null + then + echo "${mode} annotate [Failed: perf record]" + err=1 + return + fi else - perf mem record -o - ${testprogs[$index]} 2> /dev/null > "${perfdata}" - fi - if [ "x$?" != "x0" ] - then - echo "${mode} annotate [Failed: perf record]" - err=1 - return + if ! perf mem record -o - ${testprogs[$index]} 2> /dev/null > "${perfdata}" + then + echo "${mode} annotate [Failed: perf record]" + err=1 + return + fi fi # Generate the annotated output file if [ "x${mode}" == "xBasic" ] then - perf annotate --code-with-type -i "${perfdata}" --stdio --percent-limit 1 2> /dev/null > "${perfout}" + if ! perf annotate --code-with-type -i "${perfdata}" --stdio --percent-limit 1 2> /dev/null > "${perfout}" + then + echo "${mode} annotate [Failed: perf annotate]" + err=1 + return + fi else - perf annotate --code-with-type -i - --stdio 2> /dev/null --percent-limit 1 < "${perfdata}" > "${perfout}" + if ! perf annotate --code-with-type -i - --stdio 2> /dev/null --percent-limit 1 < "${perfdata}" > "${perfout}" + then + echo "${mode} annotate [Failed: perf annotate]" + err=1 + return + fi fi # check if it has the target data type -- 2.55.0