From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dy1-f202.google.com (mail-dy1-f202.google.com [74.125.82.202]) (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 18B11341AB1 for ; Mon, 20 Apr 2026 00:01:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776643266; cv=none; b=ob2VOxuyUhUNPytNEt54QXsVCBedeg0aGS1EEJna0Z9GioFSG5YImzLQTg/P9AK81iSpRg9zmFRtXUHHk1zcsh6VK1QMfMXzdBZtpwBJkv6BEh/zAncrukvT65SPezEdsgHT10mVjIZb3CH0cTWJG3ILBOSDnY0IJmhfHOGEHDs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776643266; c=relaxed/simple; bh=rMqFIYIkvaaGFeMjdFBR/Cc+MYTocflKxBPL52q09TE=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=kLbq3tzsGRAeQxuxRtXhcA2ckK5oKhYqK9onmSPGYcRSASTOXYEcHuvIeEfIwPEwmXF2ISqjJtT0XW88+4MB3yr3AUq1wR2Gm+DDLauxRdavje0VX2S9lXRHKYvVRSK0To60SMNg+p3zOMmGvGW2tTSi+IAef+rKd46v9uvw+Sk= 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=dzUpZLZq; arc=none smtp.client-ip=74.125.82.202 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="dzUpZLZq" Received: by mail-dy1-f202.google.com with SMTP id 5a478bee46e88-2d93379001eso819389eec.1 for ; Sun, 19 Apr 2026 17:01:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1776643263; x=1777248063; 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=E6Z3uLzqcBo0688zE8JUqYPeXg2WRmZzgQJbIPTtO/o=; b=dzUpZLZqXjfIbc+Va1mjx/zRfsLTjZ+bCtb3/aN97uedsAC+vQ6aPibnF1ZPZxVgBL 0Z6c5fAvXbKiCd5r9GMeAPY0MCHgnovF7rSH5oq0+/cSdmvKCx28S9HYQ+qCQRLzF+vl y4l6cC3rtIzhi4m1zJeE9ZzmnvhAebIumPhWJji4/kRPjlkevvBQT6pxD35+GyOOJYC0 eic9QdAxNR1s09TUIq+/WqpXwk5+iLsnhRTglJHpA1jO0EltwD/MiHWlhsCfidrNVw9u E6STuG0bvf9NZkj6czTotFJ+qm+DBZMnie6l5bsbhLE9/scOSZh2O+8CafpccDmlogh7 olEQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776643263; x=1777248063; 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=E6Z3uLzqcBo0688zE8JUqYPeXg2WRmZzgQJbIPTtO/o=; b=SoXCSWWJGMllp5TG6sDLK1n8zCPlwbwhIVXCaYPfLNXC1XNcsfTiq6vacQA9LqNv0k 0IMi9cDeIO0yOddYwNnV2S1KpBxMG6qkrRoW54dkFRu5kUTfxQOPw7w4qBGap+GruuOZ xGZBcHTE/1bfSO1djNSfRhbu90eb1u5dRKoOYttIUceJXa7kUlu+tMRXESBKZN76fbxb TIOddwU46QCaUCCCktuGmD0Ub6v3GI3K5tqrDxOMTUTv0gbVB5/U5jqU2c8qVwxgn7NO 6bv+PNsncAK9csUOWQg3JosndrCyqQP+/T8V+zUs4MiUv+tHUR8GzW3KUmAHVsIOvMCl puBQ== X-Forwarded-Encrypted: i=1; AFNElJ+2r9K0pv6ZaVvL5aJs5b+bkAkTGeuFKCqYJTdM5TUkdZ29iaTJ15LaJQXeiqElOSEbjkup3eqHELxNxH02v78j@vger.kernel.org X-Gm-Message-State: AOJu0YzlSVMeUbXEHLcErEZlJ6SGqCAzJEDFm9pAskXoL/wrQVEM5VgO T0xNpahaBDzDV7d2yjr7+1fjCanMWZ0wux79zBhF1XPSPTjMip3eEwj79towwqEEOftFp2TmD0/ Gkdydfuo7iw== X-Received: from dycpp12.prod.google.com ([2002:a05:7301:dd8c:b0:2dc:7d1e:d0e7]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7300:ed18:b0:2d8:7302:d3b with SMTP id 5a478bee46e88-2e4788392e5mr6224287eec.18.1776643262867; Sun, 19 Apr 2026 17:01:02 -0700 (PDT) Date: Sun, 19 Apr 2026 16:58:56 -0700 In-Reply-To: <20260419235911.2186050-1-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: <20260419235911.2186050-1-irogers@google.com> X-Mailer: git-send-email 2.54.0.rc1.513.gad8abe7a5a-goog Message-ID: <20260419235911.2186050-45-irogers@google.com> Subject: [PATCH v1 44/58] perf sctop: Port sctop to use python module From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Jiri Olsa , Adrian Hunter , James Clark , Alice Rogers , Suzuki K Poulose , Mike Leach , John Garry , Leo Yan , Yicong Yang , Jonathan Cameron , Nick Terrell , David Sterba , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , Alexandre Chartre , Dmitrii Dolgov <9erthalion6@gmail.com>, Yuzhuo Jing , Blake Jones , Changbin Du , Gautam Menghani , Wangyang Guo , Pan Deng , Zhiguo Zhou , Tianyou Li , Thomas Falcon , Athira Rajeev , Collin Funk , Dapeng Mi , Ravi Bangoria , Zecheng Li , tanze , Thomas Richter , Ankur Arora , "Tycho Andersen (AMD)" , Howard Chu , Sun Jian , Derek Foreman , Swapnil Sapkal , Anubhav Shelat , Ricky Ringler , Qinxin Xia , Aditya Bodkhe , Chun-Tse Shao , Stephen Brennan , Yang Li , Chuck Lever , Chen Ni , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org Cc: Ian Rogers Content-Type: text/plain; charset="UTF-8" Port sctop.py from tools/perf/scripts/python/ to tools/perf/python/, refactoring it to use a class-based structure (SCTopAnalyzer) and the perf.session API. Also add support for live mode using the LiveSession helper when no input file is specified, with a fallback strategy for tracepoint names (raw_syscalls:sys_enter or syscalls:sys_enter) to support different systems. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers --- tools/perf/python/sctop.py | 149 +++++++++++++++++++++++++++++++++++++ 1 file changed, 149 insertions(+) create mode 100755 tools/perf/python/sctop.py diff --git a/tools/perf/python/sctop.py b/tools/perf/python/sctop.py new file mode 100755 index 000000000000..6daa5f0a3b21 --- /dev/null +++ b/tools/perf/python/sctop.py @@ -0,0 +1,149 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 +""" +System call top + +Periodically displays system-wide system call totals, broken down by +syscall. If a [comm] arg is specified, only syscalls called by +[comm] are displayed. If an [interval] arg is specified, the display +will be refreshed every [interval] seconds. The default interval is +3 seconds. + +Ported from tools/perf/scripts/python/sctop.py +""" + +import argparse +from collections import defaultdict +import sys +import threading +import perf +from perf_live import LiveSession + + + + +class SCTopAnalyzer: + """Periodically displays system-wide system call totals.""" + + def __init__(self, for_comm: str | None, interval: int): + self.for_comm = for_comm + self.interval = interval + self.syscalls: dict[int, int] = defaultdict(int) + self.lock = threading.Lock() + self.stop_event = threading.Event() + self.thread = threading.Thread(target=self.print_syscall_totals) + + def syscall_name(self, syscall_id: int) -> str: + """Lookup syscall name by ID.""" + try: + return perf.syscall_name(syscall_id) + except Exception: # pylint: disable=broad-exception-caught + pass + return str(syscall_id) + + def process_event(self, sample: perf.sample_event) -> None: + """Collect syscall events.""" + name = str(sample.evsel) + comm = getattr(sample, "comm", "Unknown") + syscall_id = getattr(sample, "id", -1) + + if syscall_id == -1: + return + + if name in ("evsel(raw_syscalls:sys_enter)", "evsel(syscalls:sys_enter)"): + if self.for_comm is not None and comm != self.for_comm: + return + with self.lock: + self.syscalls[syscall_id] += 1 + + def print_syscall_totals(self): + """Periodically print syscall totals.""" + while not self.stop_event.is_set(): + # Clear terminal + print("\x1b[2J\x1b[H", end="") + + if self.for_comm is not None: + print(f"\nsyscall events for {self.for_comm}:\n") + else: + print("\nsyscall events:\n") + + print(f"{'event':40s} {'count':10s}") + print(f"{'-' * 40:40s} {'-' * 10:10s}") + + with self.lock: + current_syscalls = list(self.syscalls.items()) + self.syscalls.clear() + + current_syscalls.sort(key=lambda kv: (kv[1], kv[0]), reverse=True) + + for syscall_id, val in current_syscalls: + print(f"{self.syscall_name(syscall_id):<40s} {val:10d}") + + self.stop_event.wait(self.interval) + + def start(self): + """Start the background thread.""" + self.thread.start() + + def stop(self): + """Stop the background thread.""" + self.stop_event.set() + self.thread.join() + + +def main(): + """Main function.""" + ap = argparse.ArgumentParser(description="System call top") + ap.add_argument("args", nargs="*", help="[comm] [interval] or [interval]") + ap.add_argument("-i", "--input", help="Input file name") + args = ap.parse_args() + + for_comm = None + default_interval = 3 + interval = default_interval + + if len(args.args) > 2: + print("Usage: perf script -s sctop.py [comm] [interval]") + sys.exit(1) + + if len(args.args) > 1: + for_comm = args.args[0] + try: + interval = int(args.args[1]) + except ValueError: + print(f"Invalid interval: {args.args[1]}") + sys.exit(1) + elif len(args.args) > 0: + try: + interval = int(args.args[0]) + except ValueError: + for_comm = args.args[0] + interval = default_interval + + analyzer = SCTopAnalyzer(for_comm, interval) + analyzer.start() + + try: + if args.input: + session = perf.session(perf.data(args.input), sample=analyzer.process_event) + session.process_events() + else: + try: + live_session = LiveSession( + "raw_syscalls:sys_enter", sample_callback=analyzer.process_event + ) + except OSError: + live_session = LiveSession( + "syscalls:sys_enter", sample_callback=analyzer.process_event + ) + live_session.run() + except KeyboardInterrupt: + pass + except IOError as e: + print(f"Error: {e}") + finally: + analyzer.stop() + + +if __name__ == "__main__": + main() -- 2.54.0.rc1.513.gad8abe7a5a-goog