From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dy1-f201.google.com (mail-dy1-f201.google.com [74.125.82.201]) (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 EC4863DB628 for ; Thu, 23 Apr 2026 03:57:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776916654; cv=none; b=Xicgma4GqUGJjYQve1206ipy5q1Fpuye+6SMQIySG+FD5A7vcvqYzYjIF9ggST1ngZn5ZsqGksUGsucHwnu83PXA0cTGwZGy3FGuC3E0arOerJyAEa+ndfS5duMfHE8rryB5BtRKHDnhdxpPg/Mxjtjua/Kz/hXVMwzvhifhPzs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776916654; c=relaxed/simple; bh=q9qCaBC8SQRXKzJRpTF9IpYpsNVqNFm3u3EPd8mu4n4=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=DxQhlk15/5d9AfmqLLoAaviJlqjGDF88v8J82w4sx/uIsepG6FRUo5JU4QjENl5ziz+S+G9Nbnb0QoStY5nEP+Fy9WsBlfSodJsWjYMyHpuhjhUVB9pQQ9pYmlnSEntphU+AxsZVaN8YtCw6c3cVfwLhtBBvRYmpaZBnzJYVw/Q= 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=VSHCnSp3; arc=none smtp.client-ip=74.125.82.201 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="VSHCnSp3" Received: by mail-dy1-f201.google.com with SMTP id 5a478bee46e88-2ddd8ef5343so5809644eec.1 for ; Wed, 22 Apr 2026 20:57:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1776916652; x=1777521452; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=Mz7KkgG60U+qq/WkEKKVsCqRg/ilLtRWfP0GbIZ3c+U=; b=VSHCnSp3IqMihRaFi0j6gM8C0iUVw203qcBjQeX2rBb9seUYGppomwkmj9af313pe7 DTZg8tMNKuHgk9eCh/VRyGXVBefPYS9ulvMUMj/xRHvCo+EB3MIIrtKSFCBdIsw6l3b9 Du+Jz4httyVimrvhMmEX+YOz4uuL85Z+yb9QyLYjPV/K/WIl6Sdoc6eAh6wWIQ1G4uep Xi8OvAHcf7bF0CWHu72GV7ZWZJZjzRv5TJhEcHJXu+sZjc/GJCTyytVs36V/AECtlYYh 8VWazqnrKtRZ6tlJD8g06Rfb5gVCkDo5ixDewrBjTviNS+VXxI83t5zu3TNaJ/VkIwQ7 42Hw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776916652; x=1777521452; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Mz7KkgG60U+qq/WkEKKVsCqRg/ilLtRWfP0GbIZ3c+U=; b=MWePsNQElbyYslVeTY6vTEezozP0fmVF32bieFt45kpUmxdEpTZLXr+neuBlPHQ1CM olFYZ07LbYMbgJiwDExU2v709z6uGj5TPBnZQHECRVntPAcvWO+sDDuX36PKxnM7HMgb rPzCyrjHeR+Cufux6a967TJy06S+5RKLc0Wv5nROTrQh6HjWbKGEEtiJFdXCviNy1PlJ RvI5KueGoV00Ua4oty83L/A0x5+8giAEdBhHsD3sluID6Tt0RAsuFT1dwj0ZFP7i7CDe a2MrojWVCss360l442GjeWsUAiSKA439tGZrOZpbOeIhWHw1qBIVuBga0/RuYMK57ksm m3vQ== X-Forwarded-Encrypted: i=1; AFNElJ9quufuA0ik2FLNm4zQTkxYGbY7KkbCCgj0XBdIB5hpZ84+NrYyhMxORVYtrLv3NZLASqAULn5MqH8P+CvokCnX@vger.kernel.org X-Gm-Message-State: AOJu0Yw0fShS1EmMR5X6WO6lnLMu662XKDp5oqPlTSDVQdjscmhqjDXi U+Yf5DfvVWqrqV+z3z93x+uIsRi1aiE6GmUyBxUOrMXudTj9ZsuY0+dmoXCeffIr/eYBPKd3hwg ezGovNPBasw== X-Received: from dybmf1.prod.google.com ([2002:a05:7301:901:b0:2d8:f479:9a89]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:693c:8005:b0:2dd:144b:6c2 with SMTP id 5a478bee46e88-2e478e28c50mr10502019eec.27.1776916649006; Wed, 22 Apr 2026 20:57:29 -0700 (PDT) Date: Wed, 22 Apr 2026 20:55:19 -0700 In-Reply-To: <20260423035526.1537178-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260419235911.2186050-27-irogers@google.com> <20260423035526.1537178-1-irogers@google.com> X-Mailer: git-send-email 2.54.0.rc2.533.g4f5dca5207-goog Message-ID: <20260423035526.1537178-53-irogers@google.com> Subject: [PATCH v2 52/58] perf test: Migrate Intel PT virtual LBR test to use Python API From: Ian Rogers To: irogers@google.com, acme@kernel.org, adrian.hunter@intel.com, james.clark@linaro.org, leo.yan@linux.dev, namhyung@kernel.org, tmricht@linux.ibm.com Cc: 9erthalion6@gmail.com, adityab1@linux.ibm.com, alexandre.chartre@oracle.com, alice.mei.rogers@gmail.com, ankur.a.arora@oracle.com, ashelat@redhat.com, atrajeev@linux.ibm.com, blakejones@google.com, changbin.du@huawei.com, chuck.lever@oracle.com, collin.funk1@gmail.com, coresight@lists.linaro.org, ctshao@google.com, dapeng1.mi@linux.intel.com, derek.foreman@collabora.com, dsterba@suse.com, gautam@linux.ibm.com, howardchu95@gmail.com, john.g.garry@oracle.com, jolsa@kernel.org, jonathan.cameron@huawei.com, justinstitt@google.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, mike.leach@arm.com, mingo@redhat.com, morbo@google.com, nathan@kernel.org, nichen@iscas.ac.cn, nick.desaulniers+lkml@gmail.com, pan.deng@intel.com, peterz@infradead.org, ravi.bangoria@amd.com, ricky.ringler@proton.me, stephen.s.brennan@oracle.com, sun.jian.kdev@gmail.com, suzuki.poulose@arm.com, swapnil.sapkal@amd.com, tanze@kylinos.cn, terrelln@fb.com, thomas.falcon@intel.com, tianyou.li@intel.com, tycho@kernel.org, wangyang.guo@intel.com, xiaqinxin@huawei.com, yang.lee@linux.alibaba.com, yuzhuo@google.com, zhiguo.zhou@intel.com, zli94@ncsu.edu Content-Type: text/plain; charset="UTF-8" The Intel PT virtual LBR test used an ad-hoc Python script written on the fly to parse branch stacks. This change migrates it to use the newly added `brstack` iterator API in the `perf` Python module. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers --- .../perf/tests/shell/lib/perf_brstack_max.py | 43 +++++++++++++++++++ tools/perf/tests/shell/test_intel_pt.sh | 35 +++++---------- 2 files changed, 53 insertions(+), 25 deletions(-) create mode 100644 tools/perf/tests/shell/lib/perf_brstack_max.py diff --git a/tools/perf/tests/shell/lib/perf_brstack_max.py b/tools/perf/tests/shell/lib/perf_brstack_max.py new file mode 100644 index 000000000000..c826e14160d6 --- /dev/null +++ b/tools/perf/tests/shell/lib/perf_brstack_max.py @@ -0,0 +1,43 @@ +#!/usr/bin/python +# SPDX-License-Identifier: GPL-2.0 +# Determine the maximum size of branch stacks in a perf.data file. + +import argparse +import sys + +import os + +script_dir = os.path.dirname(os.path.abspath(__file__)) +python_dir = os.path.abspath(os.path.join(script_dir, "../../../python")) +sys.path.insert(0, python_dir) + +import perf + +def main(): + ap = argparse.ArgumentParser() + ap.add_argument("-i", "--input", default="perf.data", help="Input file name") + args = ap.parse_args() + + bmax = 0 + + def process_event(sample): + nonlocal bmax + try: + brstack = sample.brstack + if brstack: + n = sum(1 for _ in brstack) + if n > bmax: + bmax = n + except AttributeError: + pass + + try: + session = perf.session(perf.data(args.input), sample=process_event) + session.process_events() + print("max brstack", bmax) + except Exception as e: + print(f"Error processing events: {e}", file=sys.stderr) + sys.exit(1) + +if __name__ == "__main__": + main() diff --git a/tools/perf/tests/shell/test_intel_pt.sh b/tools/perf/tests/shell/test_intel_pt.sh index 8ee761f03c38..d711ecdf5be0 100755 --- a/tools/perf/tests/shell/test_intel_pt.sh +++ b/tools/perf/tests/shell/test_intel_pt.sh @@ -24,7 +24,6 @@ errfile="${temp_dir}/test-err.txt" workload="${temp_dir}/workload" awkscript="${temp_dir}/awkscript" jitdump_workload="${temp_dir}/jitdump_workload" -maxbrstack="${temp_dir}/maxbrstack.py" cleanup() { @@ -539,34 +538,20 @@ test_kernel_trace() test_virtual_lbr() { echo "--- Test virtual LBR ---" - # Check if python script is supported - libpython=$(perf version --build-options | grep python | grep -cv OFF) - if [ "${libpython}" != "1" ] ; then - echo "SKIP: python scripting is not supported" + # shellcheck source=lib/setup_python.sh + . "$(dirname "$0")"/lib/setup_python.sh + + if [ -z "$PYTHON" ] ; then + echo "SKIP: Python not found" return 2 fi - # Python script to determine the maximum size of branch stacks - cat << "_end_of_file_" > "${maxbrstack}" -from __future__ import print_function - -bmax = 0 - -def process_event(param_dict): - if "brstack" in param_dict: - brstack = param_dict["brstack"] - n = len(brstack) - global bmax - if n > bmax: - bmax = n - -def trace_end(): - print("max brstack", bmax) -_end_of_file_ - # Check if virtual lbr is working - perf_record_no_bpf -o "${perfdatafile}" --aux-sample -e '{intel_pt//,cycles}:u' uname - times_val=$(perf script -i "${perfdatafile}" --itrace=L -s "${maxbrstack}" 2>/dev/null | grep "max brstack " | cut -d " " -f 3) + perf_record_no_bpf -o "${tmpfile}" --aux-sample -e '{intel_pt//,cycles}:u' perf test -w brstack + perf inject --itrace=L -i "${tmpfile}" -o "${perfdatafile}" + output=$($PYTHON "$(dirname "$0")"/lib/perf_brstack_max.py -i "${perfdatafile}") + echo "Debug: perf_brstack_max.py output: $output" + times_val=$(echo "$output" | grep "max brstack " | cut -d " " -f 3) case "${times_val}" in [0-9]*) ;; *) times_val=0;; -- 2.54.0.rc2.533.g4f5dca5207-goog