From nobody Wed Dec 17 10:45:59 2025 Received: from mail-yw1-f202.google.com (mail-yw1-f202.google.com [209.85.128.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 382E120E6FA for ; Tue, 18 Mar 2025 16:14:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742314491; cv=none; b=dcXwvY8UNHfaqc32hLnl9YAhf610vGW7xDsI+Fn7xvHavo2xUWtwnt8/3tN/u3G6M0etGfMdmw60Iz/HR2/lYKKalleF+LXd4B0jF1jWBcffUiL6c4qgucPnnZXFBeI6oEiHKME5eCseBzAntsAvtkauKr+txNmoFod/X9hSswo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742314491; c=relaxed/simple; bh=JtrCwaIemaIH1wZYdeXf6+kSx9FT6E+fy6V6+KJ4oWs=; h=Date:Message-Id:Mime-Version:Subject:From:To:Content-Type; b=VwkSW088gHoighdUSodxrEWavUdHkQpqYf5IVqTuCXy02m7Uw6cTb3H9xrGwMO4+1sP9kHgYKAWXhN2232VDPDZGJr3CXoHQ8zdUK1RqbFaise3bkVRUGdqeDCjRmax3LJ9pe+qVcHBukPQ01rWHkm9tdWnbkhjrnjuvabQopW4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=jz4eTga4; arc=none smtp.client-ip=209.85.128.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="jz4eTga4" Received: by mail-yw1-f202.google.com with SMTP id 00721157ae682-6f2c7746509so88260037b3.1 for ; Tue, 18 Mar 2025 09:14:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1742314485; x=1742919285; darn=vger.kernel.org; h=to:from:subject:mime-version:message-id:date:from:to:cc:subject :date:message-id:reply-to; bh=lpgqd99OouJUfZ9Z0+GeFS3Ytd7aZfW80L/d4uD4fxM=; b=jz4eTga4UbIlqwoxgWMNRIbmwAyNMtVE9UXykwIfvkHyl8BkfSDFCL2SeME4C6Koh6 wB6ZcyYeRhK7SEhmAgKz1DTUvHKcZYqcC8wsVSgZRqMzm41D+B6BTXIsQUQ4/1o5GNHm CDDSQ3Q/TNvy/HjJmVKhyM0BIS5YL8phPY0zsMKMseQs3t8yK2iE3NC/xxQE/ubIPeNK ks9EMkEN1c9ia7tiy0cDVRx+Se/b0AhgZIXjRLzXonx6FzUA1fpKyo1LByeqBz88pBlG Byov5V84l9I7ztbXym/v+D/ayMNwMSAp3INu/x7vQf7L0pBi0C7dJzaGTJ6WediqLdqi bh7g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1742314485; x=1742919285; h=to:from:subject:mime-version:message-id:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=lpgqd99OouJUfZ9Z0+GeFS3Ytd7aZfW80L/d4uD4fxM=; b=m/lzQ5GdVXMKFt8fYjazEli/z1E+OmhD71CH3sqOJbMVK2XEeDCpSF2/p8AO8RTioa oz9tImyiq6sq8UF574a3jZgU6/V5/WKqqp/6W5GdOuBw45MD8W1VQHzMVij+81XkFh61 nrjdqN0Pu/HbnDBeNG5L67PFV+A0woyT2F7bjV7i+g+wLJSQmJxcRM90MqGSr9y3Kz3G KLx0Pyctus5uXDulEIHxViB9huwTqH0M86oY/UbRwz4zClr6Ssv38ZvLFsWEN4dRFLaz laeIRuJyknm/IJ4ccY3jn+/OBHcpyj0rnbRCNqYXCgq9SPgAoAzWjSaiKwQlSGrsfjt/ Pkrg== X-Forwarded-Encrypted: i=1; AJvYcCVnHXrs7nK/f22DY3QdGfpjsu/eLahL2+b/CggIZTkA1GazvTaYxj9nxLqgcJrShhhw0sX+P7rzRQFxEKo=@vger.kernel.org X-Gm-Message-State: AOJu0YxPFP3/yxNd1hvLb7E36dTiEqyDPn+Fh69MB+9L+Hzfv8aV3zGX sSOmS/Q4Wfzjzq2BWpcc2asKQa9aXY/pt56JI3ogllCMdEhi/nZat2JOOq4bqtjlBopCuLPQJhN HpWpkfA== X-Google-Smtp-Source: AGHT+IFMHV+fm3kiosS3IB2rFuBikoLWu/hZvCgG6GBzQmNlz+pOHPFPlzhct5SwsMpPJf/ljpE2F+wzWGZz X-Received: from irogers.svl.corp.google.com ([2620:15c:2c5:11:ef29:15ce:a42a:b69f]) (user=irogers job=sendgmr) by 2002:a05:690c:450f:b0:6fe:d1b3:850a with SMTP id 00721157ae682-6ff460541d9mr76807b3.5.1742314485145; Tue, 18 Mar 2025 09:14:45 -0700 (PDT) Date: Tue, 18 Mar 2025 09:14:32 -0700 Message-Id: <20250318161432.33732-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.49.0.rc1.451.g8f38331e32-goog Subject: [PATCH v2] perf tests: Harden branch stack sampling test From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , James Clark , Anshuman Khandual , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, German Gomez Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" On continuous testing the perf script output can be empty, or nearly empty, causing tr/grep to exit and due to "set -e" the test traps and fails. Add some empty file handling that sets the test to skip and make grep and other text rewriting failures non-fatal by adding "|| true". Signed-off-by: Ian Rogers --- v2: Change skips to errors Leo Yan. --- tools/perf/tests/shell/test_brstack.sh | 73 +++++++++++++++++++------- 1 file changed, 53 insertions(+), 20 deletions(-) diff --git a/tools/perf/tests/shell/test_brstack.sh b/tools/perf/tests/shel= l/test_brstack.sh index e01df7581393..a7c13a22397e 100755 --- a/tools/perf/tests/shell/test_brstack.sh +++ b/tools/perf/tests/shell/test_brstack.sh @@ -1,4 +1,4 @@ -#!/bin/sh +#!/bin/bash # Check branch stack sampling =20 # SPDX-License-Identifier: GPL-2.0 @@ -17,35 +17,51 @@ fi =20 skip_test_missing_symbol brstack_bench =20 +set -x +err=3D0 TMPDIR=3D$(mktemp -d /tmp/__perf_test.program.XXXXX) TESTPROG=3D"perf test -w brstack" =20 cleanup() { rm -rf $TMPDIR + trap - EXIT TERM INT } =20 -trap cleanup EXIT TERM INT +trap_cleanup() { + set +e + echo "Unexpected signal in ${FUNCNAME[1]}" + cleanup + exit 1 +} +trap trap_cleanup EXIT TERM INT =20 test_user_branches() { echo "Testing user branch stack sampling" =20 - perf record -o $TMPDIR/perf.data --branch-filter any,save_type,u -- ${TES= TPROG} > /dev/null 2>&1 - perf script -i $TMPDIR/perf.data --fields brstacksym | tr -s ' ' '\n' > $= TMPDIR/perf.script + perf record -o "$TMPDIR/perf.data" --branch-filter any,save_type,u -- ${T= ESTPROG} > "$TMPDIR/record.txt" 2>&1 + perf script -i "$TMPDIR/perf.data" --fields brstacksym > "$TMPDIR/perf.sc= ript" =20 # example of branch entries: # brstack_foo+0x14/brstack_bar+0x40/P/-/-/0/CALL =20 - set -x - grep -E -m1 "^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/IND_CALL/.*$" $TMPD= IR/perf.script - grep -E -m1 "^brstack_foo\+[^ ]*/brstack_bar\+[^ ]*/CALL/.*$" $TMPDIR/per= f.script - grep -E -m1 "^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/CALL/.*$" $TMPDIR/p= erf.script - grep -E -m1 "^brstack_bench\+[^ ]*/brstack_bar\+[^ ]*/CALL/.*$" $TMPDIR/p= erf.script - grep -E -m1 "^brstack_bar\+[^ ]*/brstack_foo\+[^ ]*/RET/.*$" $TMPDIR/per= f.script - grep -E -m1 "^brstack_foo\+[^ ]*/brstack_bench\+[^ ]*/RET/.*$" $TMPDIR/pe= rf.script - grep -E -m1 "^brstack_bench\+[^ ]*/brstack_bench\+[^ ]*/COND/.*$" $TMPDIR= /perf.script - grep -E -m1 "^brstack\+[^ ]*/brstack\+[^ ]*/UNCOND/.*$" $TMPDIR/perf.scr= ipt - set +x - + expected=3D( + "^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/IND_CALL/.*$" + "^brstack_foo\+[^ ]*/brstack_bar\+[^ ]*/CALL/.*$" + "^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/CALL/.*$" + "^brstack_bench\+[^ ]*/brstack_bar\+[^ ]*/CALL/.*$" + "^brstack_bar\+[^ ]*/brstack_foo\+[^ ]*/RET/.*$" + "^brstack_foo\+[^ ]*/brstack_bench\+[^ ]*/RET/.*$" + "^brstack_bench\+[^ ]*/brstack_bench\+[^ ]*/COND/.*$" + "^brstack\+[^ ]*/brstack\+[^ ]*/UNCOND/.*$" + ) + for x in "${expected[@]}" + do + if ! tr -s ' ' '\n' < "$TMPDIR/perf.script" | grep -E -m1 -q "$x" + then + echo "Branches missing $x" + err=3D1 + fi + done # some branch types are still not being tested: # IND COND_CALL COND_RET SYSCALL SYSRET IRQ SERROR NO_TX } @@ -57,14 +73,28 @@ test_filter() { test_filter_expect=3D$2 =20 echo "Testing branch stack filtering permutation ($test_filter_filter,$te= st_filter_expect)" - - perf record -o $TMPDIR/perf.data --branch-filter $test_filter_filter,save= _type,u -- ${TESTPROG} > /dev/null 2>&1 - perf script -i $TMPDIR/perf.data --fields brstack | tr -s ' ' '\n' | grep= '.' > $TMPDIR/perf.script + perf record -o "$TMPDIR/perf.data" --branch-filter "$test_filter_filter,s= ave_type,u" -- ${TESTPROG} > "$TMPDIR/record.txt" 2>&1 + perf script -i "$TMPDIR/perf.data" --fields brstack > "$TMPDIR/perf.scrip= t" =20 # fail if we find any branch type that doesn't match any of the expected = ones # also consider UNKNOWN branch types (-) - if grep -E -vm1 "^[^ ]*/($test_filter_expect|-|( *))/.*$" $TMPDIR/perf.sc= ript; then - return 1 + if [ ! -s "$TMPDIR/perf.script" ] + then + echo "Empty script output" + err=3D1 + return + fi + # Look for lines not matching test_filter_expect ignoring issues caused + # by empty output + tr -s ' ' '\n' < "$TMPDIR/perf.script" | grep '.' | \ + grep -E -vm1 "^[^ ]*/($test_filter_expect|-|( *))/.*$" \ + > "$TMPDIR/perf.script-filtered" || true + if [ -s "$TMPDIR/perf.script-filtered" ] + then + echo "Unexpected branch filter in script output" + cat "$TMPDIR/perf.script" + err=3D1 + return fi } =20 @@ -80,3 +110,6 @@ test_filter "any_ret" "RET|COND_RET|SYSRET|ERET" test_filter "call,cond" "CALL|SYSCALL|COND" test_filter "any_call,cond" "CALL|IND_CALL|COND_CALL|IRQ|SYSCALL|COND" test_filter "cond,any_call,any_ret" "COND|CALL|IND_CALL|COND_CALL|SYSCALL|= IRQ|RET|COND_RET|SYSRET|ERET" + +cleanup +exit $err --=20 2.49.0.rc1.451.g8f38331e32-goog