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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 33EFFFF885C for ; Sat, 25 Apr 2026 22:53:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:Cc:To:From: Subject:Message-ID:References:Mime-Version:In-Reply-To:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=22aR7BdMkfc4F5hxQy/Qmu6pnO70TcMwJUmCFfE13QY=; b=V5lTXYbrMY9txQ4vISndiJduBI x9mq0ClUqUEE+zPNFdazGJpNzNV9FjVcdXEqJHbsjIgc10NT+PTmGz9TlqjK3g1YgKrAyW/AeGXxx /R0zbsNytlYlrjiju30k0z/6xkC7TL9uGHbWmLJ7Vk2L2W+TK9m53233CwkW/1ZoQCoiyx2i2ljVJ ycfQ8cNkqqiF+yjNu8IABzIvFkZZKuwfe8EGP1rkwAmMMVQUtwjUO/hjdL7k/nofeHzPq2T4J9Jpp QxBEbpgZWfTQfDj32HiJMwtmwQt+e87jICMRVsBlGvXGgP06mMG5HlsqHouXQRFqfZHiOumy3rhUf N0LTVafA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wGlsI-0000000F194-0QKm; Sat, 25 Apr 2026 22:53:22 +0000 Received: from mail-dy1-x1349.google.com ([2607:f8b0:4864:20::1349]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wGlqs-0000000EzWD-12t0 for linux-arm-kernel@lists.infradead.org; Sat, 25 Apr 2026 22:52:13 +0000 Received: by mail-dy1-x1349.google.com with SMTP id 5a478bee46e88-2dd6fb4c867so15665992eec.0 for ; Sat, 25 Apr 2026 15:51:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1777157512; x=1777762312; darn=lists.infradead.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=22aR7BdMkfc4F5hxQy/Qmu6pnO70TcMwJUmCFfE13QY=; b=gJuDub8ha/FZNdT4VNIActoizhsnyISWGd60Vfr1i0yZtaxneanIaskLWca1sQgEal Oi9ZIGRS5YI5Z2e/3OA9kVDxz6bcFbzgrYCVRnIq58G80cOQP/Td4nE+GvFNlnBoXzwP KMqvhEwJT3ianK+gQMNdNIBkDsXUcIv6otibOfySUqumFu5k6JstXRZSgu637vKQPf6O LknLcAQhwp9VZVAdIveOxwgCDnLdGGeKGZg7jMGs5V1JYwbGkutyXBPf2X6Ob7jXS/mi 9Ct/b+t+iljk5y8C0k2t0krwoAmwEab+U+2yMBv5zPpzW3S/kwuIpLkhGF3Knldmz6tq dimQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777157512; x=1777762312; 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=22aR7BdMkfc4F5hxQy/Qmu6pnO70TcMwJUmCFfE13QY=; b=FKvhaEYMrUahU82hqs7/btDbptj1+NRt7QFKwCONdHNJDmqW1OQ+8MKu+M2kRBoQYT 2bc53IkHGnrLY9rT85bqPpNrH3jW2737EV5JsJTr9KPjniIm9SfoZ21qqXVutxsnbnPn AT6E8G738j4oxBcCeLh+vlsuKHd/59q1q6VVxAx6thfHPMHVYptEXH6FUeNtzER2ZXPu aUJv2aV52+5vaOcoHqncyG40Eg81PDqivKyIQ9y9KbdpO77hujDXp34F/tYdW9KA3C+N qIKDA63Z6zwNzRE6EMp2Mys6vpJBzPdSYpKkwB186U/Yqq1fJ/CuR97J1OP/ZH9FB7Pk xPIw== X-Forwarded-Encrypted: i=1; AFNElJ8BgsnOpF/HwDx9+PdA8o9ZR9vbFQa/CaFUQMElPD3sX3KqFBEXbEli5D1QnfB1sQdifM+bUFyx6PkcHuZ++j4C@lists.infradead.org X-Gm-Message-State: AOJu0Yzp/ZtEHdn0UHfas1vOS6ath9qdHe228I6vD5C5qeiKvuzxHsyZ 99l14c/ozLBfEVqsRSM+EuU99v+ryPr8vQptblnkbsmFIJC7jp0p+lUCu3KiKwliSnmqgcDiNGQ j29LlXQJYZA== X-Received: from dyblf37.prod.google.com ([2002:a05:7301:a25:b0:2da:4e8f:1752]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7300:6da7:b0:2c7:8e1c:956a with SMTP id 5a478bee46e88-2e479d076b0mr21143652eec.19.1777157511536; Sat, 25 Apr 2026 15:51:51 -0700 (PDT) Date: Sat, 25 Apr 2026 15:49:39 -0700 In-Reply-To: <20260425224951.174663-1-irogers@google.com> Mime-Version: 1.0 References: <20260425174858.3922152-1-irogers@google.com> <20260425224951.174663-1-irogers@google.com> X-Mailer: git-send-email 2.54.0.545.g6539524ca2-goog Message-ID: <20260425224951.174663-48-irogers@google.com> Subject: [PATCH v7 47/59] perf failed-syscalls: Port failed-syscalls to use python module From: Ian Rogers To: acme@kernel.org, adrian.hunter@intel.com, james.clark@linaro.org, leo.yan@linux.dev, namhyung@kernel.org, tmricht@linux.ibm.com Cc: alice.mei.rogers@gmail.com, dapeng1.mi@linux.intel.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, Ian Rogers Content-Type: text/plain; charset="UTF-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260425_155154_431179_8BCFFE40 X-CRM114-Status: GOOD ( 14.81 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Port the legacy Perl script failed-syscalls.pl to a python script using the perf module in tools/perf/python. The new script uses a class-based architecture and leverages the perf.session API for event processing, making it a standalone script that reads perf.data files. It filters for sys_exit events, checks for failed syscalls (where return value ret < 0), and aggregates counts per command name. Complications: - The script is designed for file-based processing using perf.session. - pylint warns about the module name not being snake_case, but it is kept for consistency with the original script name. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers --- tools/perf/python/failed-syscalls.py | 78 ++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100755 tools/perf/python/failed-syscalls.py diff --git a/tools/perf/python/failed-syscalls.py b/tools/perf/python/failed-syscalls.py new file mode 100755 index 000000000000..c3b58664eb57 --- /dev/null +++ b/tools/perf/python/failed-syscalls.py @@ -0,0 +1,78 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 +"""Failed system call counts.""" + +import argparse +from collections import defaultdict +import sys +from typing import Optional +import perf + +class FailedSyscalls: + """Tracks and displays failed system call totals.""" + def __init__(self, comm: Optional[str] = None) -> None: + self.failed_syscalls: dict[str, int] = defaultdict(int) + self.for_comm = comm + self.session: Optional[perf.session] = None + self.unhandled: dict[str, int] = defaultdict(int) + + def process_event(self, sample: perf.sample_event) -> None: + """Process sys_exit events.""" + event_name = str(sample.evsel) + if not event_name.startswith("evsel(syscalls:sys_exit_") and \ + not event_name.startswith("evsel(raw_syscalls:sys_exit_"): + return + + try: + ret = sample.ret + except AttributeError: + self.unhandled[event_name] += 1 + return + + if ret >= 0: + return + + pid = sample.sample_pid + assert self.session is not None + try: + comm = self.session.find_thread(pid).comm() + except Exception: # pylint: disable=broad-except + comm = "unknown" + + if self.for_comm and comm != self.for_comm: + return + + self.failed_syscalls[comm] += 1 + + def print_totals(self) -> None: + """Print summary table.""" + print("\nfailed syscalls by comm:\n") + print(f"{'comm':<20s} {'# errors':>10s}") + print(f"{'-'*20} {'-'*10}") + + for comm, val in sorted(self.failed_syscalls.items(), + key=lambda kv: (kv[1], kv[0]), reverse=True): + print(f"{comm:<20s} {val:10d}") + + def run(self, input_file: str) -> None: + """Run the session.""" + self.session = perf.session(perf.data(input_file), sample=self.process_event) + self.session.process_events() + self.print_totals() + +def main() -> None: + """Main function.""" + parser = argparse.ArgumentParser(description="Trace failed syscalls") + parser.add_argument("comm", nargs="?", help="Filter by command name") + parser.add_argument("-i", "--input", default="perf.data", help="Input file") + args = parser.parse_args() + + analyzer = FailedSyscalls(args.comm) + try: + analyzer.run(args.input) + except IOError as e: + print(e, file=sys.stderr) + sys.exit(1) + +if __name__ == "__main__": + main() -- 2.54.0.545.g6539524ca2-goog