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 A63A638C2B0 for ; Sat, 25 Apr 2026 22:42:27 +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=1777156949; cv=none; b=rdVoGA28p2A9PJcyNQd/wzqOHE+Aq/1UEYmM13EP1XFjphKA1EyYR8vHf6ZkreJwBiRRGssDswzd2n0765MfV+5ur6+LbeEYlTc2LxMX3LJNqd5T9xfdKIfKnk+rZLqxOXiCZg5mXV1iOcj225oYkyVY+JSkN1e1sF9PfiXCt8k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777156949; c=relaxed/simple; bh=FsZbTBhM56M9pIEzMOPTGuMLNalT4O3LRdQk+/cVt2E=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=Tnm02ASmGPZZGX0AezbnVEhPEOs5syV6jwLSPeXdUPmtwGsSbbWCCYwdHZXu9EQtgj567d7vb//sYbC/DwACfqQ3q9mByrHTqNZ96GNVJsOfu28lvU2Bb3BkJD/1hzdvLsSFcas3rqW4fr3A3yOhnPeFkVElnxq9auw+CZlCh1g= 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=Jybj59UN; 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="Jybj59UN" Received: by mail-dy1-f201.google.com with SMTP id 5a478bee46e88-2bdf6fe90a9so13686796eec.1 for ; Sat, 25 Apr 2026 15:42:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1777156947; x=1777761747; 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=uUuqjywSMoBiuUZB5eMXpVGDru/SJ2JbsKc572+eD7Q=; b=Jybj59UNgv/IYePfKMcEgXqCtbdDCYaWhx90dqes9RJxl3I+Oybsy+ZJ0sET2YekhP bImFlshqeTHaPgyjvqQ4qUPkNR2HwXd3ICLNgMFxE0hCoonDkNSzo3jYfbOhFAO1p682 huIsDskS4ov6SCNTaElgRUqMrYhbj05avreHIf2CFc3edh3BAfi3vfeWY8ZFMYPe6q/V fG7nT4os6hSwlzEhiYm0Rn4e2BdEy4rtiYcnvGEa2zc2rCju5+eJX2zdZQ0gxIoqbGNy zyRXi9qcIKvz7UW0aPR61j8rW5O576fB/aYt1cIYqgMm97IzSAbQx+ngJ8GIfdNeiTNd 6FHA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777156947; x=1777761747; 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=oqoGkTVt92h7TgXjA+MIE8ujNMlu8eT7Z4vgjOOlCNZMFh5/SL2WINcrbRW8ZZIHu7 ntAO08+34Zoqz5b+Pha0tUjdj1V0qn5FA9FvTmjD/eS7JC7dzVZmHJVCX4k7PfI8wdZ+ hIMsVgAQIGVtG9fXn71RtfjOGuWWcFHy0jNweNjsQaNLoh9bDWeV8iOI5UjeylMArhj6 rpPD8ajHHy80UORhhKq6np3RfY6OnuxMowUzM1S8cOLi3bdJKJJGjUvKbzuCOPKMKpPL XOqY2i7BEXuW3Zm4mb7pwau96Il5vv9zJ/hSeqGS1hgcoitWxV9XQ4wxV8eZ+YtkUNOm g5XA== X-Forwarded-Encrypted: i=1; AFNElJ+2/jA8EHwpO6YuFH44YazZNqDkHqMZdnaU5NmruuTY3lXEYNBDt3R6xuyiXCrYQQV8PbtZWCo6aJPLhAV1uNHE@vger.kernel.org X-Gm-Message-State: AOJu0Yzf7xymFxmvcpSbJUAspSBIUeA026iIuaYziASsapEgelrxV2UX 0R2rXjnfbO/herNHg/OD8on0P1tCtxsxUH1qBmqniv1letJDQn+b4A1yJaSxZFtRRg/m2n8kaLT 4HaTWaONqYQ== X-Received: from dycnm7.prod.google.com ([2002:a05:7300:d187:b0:2d8:fc66:cd7b]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:693c:2b04:b0:2e2:a4ba:84ae with SMTP id 5a478bee46e88-2e479017499mr20173723eec.25.1777156946642; Sat, 25 Apr 2026 15:42:26 -0700 (PDT) Date: Sat, 25 Apr 2026 15:40:52 -0700 In-Reply-To: <20260425224125.160890-1-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: <20260425174858.3922152-1-irogers@google.com> <20260425224125.160890-1-irogers@google.com> X-Mailer: git-send-email 2.54.0.545.g6539524ca2-goog Message-ID: <20260425224125.160890-28-irogers@google.com> Subject: [PATCH v7 27/59] perf syscall-counts: Port syscall-counts 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" 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