From nobody Wed Dec 17 12:17:40 2025 Received: from mail-yw1-f201.google.com (mail-yw1-f201.google.com [209.85.128.201]) (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 79FDE20B81F for ; Tue, 18 Mar 2025 16:16:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742314605; cv=none; b=Px1zgm3nefe4d9MUQ117k1F4FXLczmVsyIdPcOueIqIw7tZ/K7ByTFO5fg+fEn+AQRiOu2WqBKiu/usSc2Ts50D3EP7BMGOE6V9v6zPGggNhm2AxtNuNoSuOfvhNQdaMDi7HQNfFLI2l9LgWUVeHqJ4zKekr4Rcf5Y9Op7q6dW0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742314605; c=relaxed/simple; bh=rFZRno4D57G8sQhaSQYhCE3pJnIZ41lDTeZnqQF1khE=; h=Date:Message-Id:Mime-Version:Subject:From:To:Content-Type; b=ZFvj1V6bVShuzoBXplCCJ2pz1ZCSmCxGkhRnPDyDWzU2X2Uv9YF8yfZpwqXk2c6E50OYnWQMa/dJPlpv8wm8i8uoPlXk+Us77D9mOF5n3+6H0et9PqhffVe33kY387b6Zdn1OBvnOCXLVmB4N3gwojhnPnFJ/M6CA+NdgxsFzaU= 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=BnX/jZQy; arc=none smtp.client-ip=209.85.128.201 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="BnX/jZQy" Received: by mail-yw1-f201.google.com with SMTP id 00721157ae682-6fed889e353so92925877b3.3 for ; Tue, 18 Mar 2025 09:16:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1742314602; x=1742919402; darn=vger.kernel.org; h=to:from:subject:mime-version:message-id:date:from:to:cc:subject :date:message-id:reply-to; bh=dgZoelN/CSZE28lWFMDK6Fgb0NKV8wQtQfqMgFFcUF4=; b=BnX/jZQyVS4eFUYiK011/Vnl320A6b1t6t65xMbuRiCcjUhLu5K7BzhmVxzURCRWBs uEFMCif5hj2zCAiKyiKKCr5hUUaurCT0JzY+rp3UPUyCwOCUrOu7CO/4jJo8FSinhOvv 0imPYjCMjWOAWF9z/adCp69fETrlRJNobU7s7OvPyTj3xWxuUHpGalJ2Xp5lOlJfFs27 FodYWllYJvdMbJ6+A+GfUA72weB3idZMoCv2W6tW19iYWP/onjn3tTEA/VJbFUBaIB0s gVGvEOsCqKa3NwIr0oZvsjQDQ7ujIPr9F+LYHLsMi5KF3Hn63g3qmCA9is5MAPpmzaUa /zlQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1742314602; x=1742919402; h=to:from:subject:mime-version:message-id:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=dgZoelN/CSZE28lWFMDK6Fgb0NKV8wQtQfqMgFFcUF4=; b=FvCbv1Ps7OnPQVTwYOx6ismnCbJnUkTzJtlq1vXXrve/ToSQBYMPyJbHkxgEBZkkAP vpdV5XP9iwG43TskQfWLbyk6F2sD7vBZAIEUA0+jReOHdkn/wwG/5l5uZS1VoM4fHqTj n8W950w0+0BD57wpQAb6oED7XEuTqTtJ/fyOUEaocNbBVkZGsCIST7V3zydaYSaNWZ8+ GMRmJ2b49BiXnDd3DSeatMONR9W2BkiMV+ibty5RDws10UK8BwIbXBbE61VvV+1UfmhY vLG1X8i/V2uD8qhlkPXL3upz7qGJURBf6NQySoEgLfkNWCYikuWQZbmsd7kfwtDE68ha 6aLw== X-Forwarded-Encrypted: i=1; AJvYcCXnj7vqX0b0kOhWLz3C6TetxTKRgIZq7rYOYx2HEMDwCQ43wrBYRSvnEX4f0WG76SN5bI8amvkIaJI4MHI=@vger.kernel.org X-Gm-Message-State: AOJu0YyXdo2wYR8kMN8Cc9sKeJOtjlnIwul9QYx/p5A0i96fcgrCzxxm r4qfaUv3sx5xDTbd1yFVfj1jh5FT6hXF+ds8hXWyIpNgV2TpMbmznPOB6xay7WDIsmW78FcEniR GYLY6qQ== X-Google-Smtp-Source: AGHT+IFD2VPtzXDi+HvMBlqNdDwg9+sNmUXhyahSsw4OEePKDKBj1JYCQEDW8oi84DxDa6xZeVSwhaUFyUtq X-Received: from irogers.svl.corp.google.com ([2620:15c:2c5:11:ef29:15ce:a42a:b69f]) (user=irogers job=sendgmr) by 2002:a05:690c:ecc:b0:6fd:a1fa:9d58 with SMTP id 00721157ae682-6ff460a7846mr74217b3.8.1742314602497; Tue, 18 Mar 2025 09:16:42 -0700 (PDT) Date: Tue, 18 Mar 2025 09:16:39 -0700 Message-Id: <20250318161639.34446-1-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 v3] 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 --- v3: Drop set -x v2: Change skips to errors Leo Yan. --- tools/perf/tests/shell/test_brstack.sh | 72 +++++++++++++++++++------- 1 file changed, 52 insertions(+), 20 deletions(-) diff --git a/tools/perf/tests/shell/test_brstack.sh b/tools/perf/tests/shel= l/test_brstack.sh index e01df7581393..9138fa83bf36 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 +17,50 @@ fi =20 skip_test_missing_symbol brstack_bench =20 +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 +72,28 @@ 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 +109,6 @@ 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