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 9373E37AA94 for ; Sat, 25 Apr 2026 17:49:55 +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=1777139397; cv=none; b=WXXmlGHxbi4BEJXcJw1w6NbuZwhkrUOFR9R3ghhU9cBlUaLVIMy8O+17g0oCAMnCp7P+rTNXQmUPPyIsbYAagEO8c0h9W5QtSz4fsIX+zmYfR/i7n1o/QH0LV/ceIAVQyXbNgYErU2AQjQ0gpopzXTeHHmhgW8+h74Z/M4Yt1/0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777139397; c=relaxed/simple; bh=FsZbTBhM56M9pIEzMOPTGuMLNalT4O3LRdQk+/cVt2E=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=fUBRLSIZVgxCI+SJqf8HHolK8+sMgGnkHF6/MtiqVyNkL1PfxLEltDrP9AXE2aIYft54nbqY101Ionhi08wF5KoWPB2lFcTRT1jWSuahmcpuC0rkZtD2QaB6xwe6VX/FqHU12tH9C5qx/2dNgLWJBJlf7WIQAeDakItb6T1HRmg= 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=HVpIOmYe; 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="HVpIOmYe" Received: by mail-dy1-f201.google.com with SMTP id 5a478bee46e88-2ddd8ef5343so8702103eec.1 for ; Sat, 25 Apr 2026 10:49:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1777139395; x=1777744195; 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=HVpIOmYeKa5qNuEsIsWtm4ykJZy6Et9mHR9Qvcgivj/JBh16Z39Ch6LzLI3SfA9y+v DcmJEQztMMo/CO17GJK39Ro7Fu6pcyVWN8kRf3aRS5IS2uqUHYlT4vqiUuTVcpD7J/YI 07ZW9jnyXUiZhTK25G0yYjItZ4bKJHn2Va/NRWOcEpRHSECzgmJOr8R50RIAW0iq7VVU aaZpad9q9/wwrq5wTwRTKY4rkEq1QsI01l+lfDiwvWN90bi3oT0WGzQwhlAOG2hqAxZm G9YGv9o4DlU3EfOVG1KlpG4k5yWLkA9SZDOHv8pXN8oQH1JPTxenx2Tmw/LHQI4WYp8h kAeg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777139395; x=1777744195; 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=aPdWVUEbY+TTR4EXBGQXQC7u0boHn171nyqWccMt0/NVcPOrAyzvhIt1G2KWSwyrpr rkr4C5seWFToW/jOc8HfGnA6oqQlsmrEDTOQ6MjXhK0DTxOOakp66YmQ94SMLmHSahPz HUy5T34VivViEsRp0blscLvrlvXy62j3hQJSYaKFPQ7G68dw2BhlBVHJI9PbWgGUMV+A EryUYMOLjDT2P+EVeAcqJDRvvmmqnwavTBR26W9tarD8AHL0BU+lActGjn1CTA49AURl qBfarHrK89pLIhRS4Yguc8uks4qWoJiUoxo47WLB6Rgw6lxwkUa50+eWtxSaF4dm0Pm4 k5vA== X-Forwarded-Encrypted: i=1; AFNElJ87JnUemsWcBv++fDicOMi3CC7EZhT0OG833PCCWiWiNWwXtxccQoqbtyUZvF7UuIoa30VHGXQvouNrIwCtiNIN@vger.kernel.org X-Gm-Message-State: AOJu0YxpnxA+le/3w07vhY80NF2y7M2FeIzAu2V3fQpPgONrb03o8E1d c+HH1q1ReO1CQuNVy/4DwHlYSzui10DnmGV1+Ty51IzUZOhp0vhUz6zJgqf885Brp3xADe1Kx0y eb+I5/9LPvA== X-Received: from dyfv9.prod.google.com ([2002:a05:7300:8249:b0:2df:7541:1895]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7300:3252:b0:2c4:ec89:bc7 with SMTP id 5a478bee46e88-2e464dacc71mr20505214eec.10.1777139394510; Sat, 25 Apr 2026 10:49:54 -0700 (PDT) Date: Sat, 25 Apr 2026 10:48:25 -0700 In-Reply-To: <20260425174858.3922152-1-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: <20260424164721.2229025-1-irogers@google.com> <20260425174858.3922152-1-irogers@google.com> X-Mailer: git-send-email 2.54.0.545.g6539524ca2-goog Message-ID: <20260425174858.3922152-28-irogers@google.com> Subject: [PATCH v6 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