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 8B686FF8870 for ; Tue, 28 Apr 2026 07:21:23 +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=uUuqjywSMoBiuUZB5eMXpVGDru/SJ2JbsKc572+eD7Q=; b=IvvXt1Uf36eiXp2ioECHccP7cy 5QbrS96QYYbtMKczMZ5cVwfpJoA8bSPi+w5k4fxq7X5qgOvTCjkV814A0rZ6KK9VkoIZZ/kEAQnub qCIp/Z/Sh47a07okoiG6kXHA7kuQHVktm5coCKIFoH+R2BGvZjKnd/i7QI9fnJ62jTa/8Uk5SvKf1 SUYofJCaK39Zhq0Vam6C9INeYmcW1kE5dT1RmZhDnp5qerWVAM5p0Jili5I5ubzkvx2uKls38H0ru vCaIaNjndy9GG/fje1jmvRL1Vmo9NkA3dCReL3Rx58U27eg/LdnyOY8EhzYD4EhO9BpmjqmGuM85f pWGIWJ6w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wHckj-00000000i0L-2Koj; Tue, 28 Apr 2026 07:21:05 +0000 Received: from mail-dl1-x124a.google.com ([2607:f8b0:4864:20::124a]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wHcjw-00000000h6c-1XxF for linux-arm-kernel@lists.infradead.org; Tue, 28 Apr 2026 07:20:17 +0000 Received: by mail-dl1-x124a.google.com with SMTP id a92af1059eb24-12dc1c0b7ccso3710150c88.1 for ; Tue, 28 Apr 2026 00:20:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1777360813; x=1777965613; 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=uUuqjywSMoBiuUZB5eMXpVGDru/SJ2JbsKc572+eD7Q=; b=fBepIbNpb6kbbEt3efldh+M9+ON7QwAnBQCOA3+WEm7KUrsm3rujzzuZsg0nAgxKbi 0KKd0Fa3CW9haticxYl9Bxr0ZEoCK8pBzzIWlyZJTYfytHfcg8gHSNEoP/S+9+XwpJV0 NCpGCSrWJOo7bWP9YyDN7qr45WDVP+tZVu5QfX4HMP6z4bDfv2QlVWJTVqjsvzQ2WtkL 2ghwmxuX38DYTLcnrjHzgOxknJ9jmS6FTM51OjtglBIp3v3oDmMFcXhFqsCkhDbSJleX urx5PyS217IfivSA16ZD9LwZABu8L9OeeavwliIlwWI50wvwfgzy0VSbipyDG2x/8HiV mhwg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777360813; x=1777965613; 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=uUuqjywSMoBiuUZB5eMXpVGDru/SJ2JbsKc572+eD7Q=; b=QojWg8/dDho1vsRCv4WLGkWzvq69vYfDQqRrl8WImYNPVCRp5w/yIoWx4fpqM7gMAN zCxiQhY+ctCOuyv4cWgZAjQU31m1XfXU4zIdSpMpmmdi2w7nsFsDOrjAGlKmnjGiYSkx jDRLkQl8NkWvn3mhJC4aODwvojMLBZ97B0eRE/VqoZJoFm6+QPwsA+e8uXw8BhdKBHWo jFXq792B8PNq9Yv3j5yRBIGr15XXd3P6XiXX8WoVthjoH+Z1PtOGVrl9agIVO21V+WER kp5Szyxd+KlEqBQWGn32sb7W/H5a/mvmaIMAtl763A7OdqMK2KkR1G4o7baxk27+oa/R P0nw== X-Forwarded-Encrypted: i=1; AFNElJ/4rggsxvA91q2rVi01nZKnIL2CNK0ejwHlpC7xSyv6vw2wmE+QtCfr+CB0iINrctgBCXSaqWXcXzu0/KQ7jwEO@lists.infradead.org X-Gm-Message-State: AOJu0YxJxo4HEjUYtEmuny+MftaymiQbH78NrH07W9jWS18W1APbr0gR hCt8J/xR0fWVgQaAKJgjhSCpv6Fu7l5qHZnme8Xd/xKqprUnRaZyzW++aeESOVe5Md/0Y2CTo44 ZsQ6gF7tbVA== X-Received: from dlbpv4.prod.google.com ([2002:a05:7023:904:b0:12d:b3cc:a807]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7022:4584:b0:12c:9037:5126 with SMTP id a92af1059eb24-12ddda69489mr736767c88.9.1777360812328; Tue, 28 Apr 2026 00:20:12 -0700 (PDT) Date: Tue, 28 Apr 2026 00:18:32 -0700 In-Reply-To: <20260428071903.1886173-1-irogers@google.com> Mime-Version: 1.0 References: <20260425224951.174663-1-irogers@google.com> <20260428071903.1886173-1-irogers@google.com> X-Mailer: git-send-email 2.54.0.545.g6539524ca2-goog Message-ID: <20260428071903.1886173-28-irogers@google.com> Subject: [PATCH v8 27/58] perf syscall-counts: Port syscall-counts to use python module From: Ian Rogers To: acme@kernel.org, namhyung@kernel.org Cc: adrian.hunter@intel.com, alice.mei.rogers@gmail.com, dapeng1.mi@linux.intel.com, james.clark@linaro.org, leo.yan@linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, tmricht@linux.ibm.com, 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-20260428_002016_580604_51BFE105 X-CRM114-Status: GOOD ( 18.27 ) 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 Rewrite tools/perf/scripts/python/syscall-counts.py to use the python module and various style changes. By avoiding the overheads in the `perf script` execution the performance improves by more than 4x as shown in the following (with PYTHON_PATH and PERF_EXEC_PATH set as necessary): ``` $ perf record -e raw_syscalls:sys_enter -a sleep 1 ... $ time perf script tools/perf/scripts/python/syscall-counts.py perf Install the python-audit package to get syscall names. For example: # apt-get install python3-audit (Ubuntu) # yum install python3-audit (Fedora) etc. Press control+C to stop and show the summary Warning: 1 out of order events recorded. syscall events for perf: event count -------------------------------------- ------------ 1 538989 16 32 203 17 3 2 257 1 204 1 15 1 7 1 0 1 real 0m3.887s user 0m3.578s sys 0m0.308s $ time python3 tools/perf/python/syscall-counts.py perf Warning: 1 out of order events recorded. syscall events for perf: event count -------------------------------------- ------------ write 538989 ioctl 32 sched_setaffinity 17 close 2 openat 1 sched_getaffinity 1 rt_sigreturn 1 poll 1 read 1 real 0m0.953s user 0m0.905s sys 0m0.048s ``` Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers --- v2: 1. Fallback for Unknown Syscalls: If perf.syscall_name() returns None for an unmapped ID, the script now falls back to using the numeric ID string. This prevents a TypeError when applying string alignment formatting. 2. Fallback for Syscall Number Attribute: The script now checks for __syscall_nr first, and if not present (as on some older kernels), falls back to checking for nr . 3. Robust Process Resolution: Added a try-except block around session.process(sample.pid).comm() . If the process lookup fails (returning NULL/None), it falls back to "unknown" instead of letting a TypeError crash the script. 4. Support for Custom Input Files: Added a -i / --input command-line argument to allow processing arbitrarily named trace files, removing the hardcoded "perf.data" restriction. --- tools/perf/python/syscall-counts.py | 72 +++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100755 tools/perf/python/syscall-counts.py diff --git a/tools/perf/python/syscall-counts.py b/tools/perf/python/syscall-counts.py new file mode 100755 index 000000000000..ef2bd8c7b24c --- /dev/null +++ b/tools/perf/python/syscall-counts.py @@ -0,0 +1,72 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 +""" +Displays system-wide system call totals, broken down by syscall. + +If a [comm] arg is specified, only syscalls called by [comm] are displayed. +""" + +import argparse +from collections import defaultdict +from typing import DefaultDict +import perf + +syscalls: DefaultDict[int, int] = defaultdict(int) +for_comm = None +session = None + + +def print_syscall_totals(): + """Print aggregated statistics.""" + if for_comm is not None: + print(f"\nsyscall events for {for_comm}:\n") + else: + print("\nsyscall events:\n") + + print(f"{'event':<40} {'count':>10}") + print("---------------------------------------- -----------") + + for sc_id, val in sorted(syscalls.items(), + key=lambda kv: (kv[1], kv[0]), reverse=True): + name = perf.syscall_name(sc_id) or str(sc_id) + print(f"{name:<40} {val:>10}") + + +def process_event(sample): + """Process a single sample event.""" + event_name = str(sample.evsel) + if event_name == "evsel(raw_syscalls:sys_enter)": + sc_id = getattr(sample, "id", -1) + elif event_name.startswith("evsel(syscalls:sys_enter_"): + sc_id = getattr(sample, "__syscall_nr", None) + if sc_id is None: + sc_id = getattr(sample, "nr", -1) + else: + return + + if sc_id == -1: + return + + comm = "unknown" + try: + if session: + proc = session.find_thread(sample.sample_pid) + if proc: + comm = proc.comm() + except (TypeError, AttributeError): + pass + + if for_comm and comm != for_comm: + return + syscalls[sc_id] += 1 + + +if __name__ == "__main__": + ap = argparse.ArgumentParser() + ap.add_argument("comm", nargs="?", help="Only report syscalls for comm") + ap.add_argument("-i", "--input", default="perf.data", help="Input file name") + args = ap.parse_args() + for_comm = args.comm + session = perf.session(perf.data(args.input), sample=process_event) + session.process_events() + print_syscall_totals() -- 2.54.0.545.g6539524ca2-goog