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 E38123EC2F4 for ; Tue, 28 Apr 2026 07:20:26 +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=1777360828; cv=none; b=VoR++d5GngrkroiageOVwVF6pLliPL+K47F/IH/EBZjoRMwCOW7eX3FbnyMy6DJUvihfK+8WBltTWJBWiMBoaMasIl5YjOyNahAyu65cnve50QdN1kzdQ26/mM/Dx8QggLmY9sJKKhZzj7UnlWGhqUUba0t70O6/LQCfIn6392I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777360828; c=relaxed/simple; bh=mBMBYkMBlLDWvbY6LNmW//JVcjR4jVeKSUbnOQaL0o8=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=Tr2LgtM3ZRLAF1VAnEsnbzDHvGQpzUF4agqkf6HFgk/6r5JTsL77nyhx+EW/nBUujhujMymzMvVYQP9h1A5Fc1ngoP6X2A2ZU3b8xCUd7iya9wUrqRAgI/6Mhx+q2X8F/G0N/iGLpJ9v6Bsiy8RSenuHjoVg7iACYlXMX97sXbY= 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=Ne3h4hEw; 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="Ne3h4hEw" Received: by mail-dy1-f202.google.com with SMTP id 5a478bee46e88-2bdf75bc88fso14245976eec.0 for ; Tue, 28 Apr 2026 00:20:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1777360826; x=1777965626; 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=lupTwS5/K/xdMFN4T0R1lWQWxBJkMX0Mah0jUIak+cQ=; b=Ne3h4hEw6Buf3ZlHAEtIDdwsWg3ppttRXa7s+bRx+6/nPA041cwolFYB+sVb9QNGLq pz9zwNssgS2SiapAiPl2IdJ0H2/SzQ3vP9xz0AfpB0Mj2Kg6U2CgFoVyoACq53H2OOYW macwDtKPFPDjVutbbJRr6HJlIXOZgNKcNeIdb3Uo0vHjt6tAoeSpDubze0f4/3UrhRH6 vb0XN+Naig79sVJ/lXSqSd7LOSLglVsZHmg6afanKvAd1pmHSoV97p5C42iIUR+rYUVa SdaCO/OWPY2ncIb8SQ6fRIRlE/wa3WnmKMS82QPctJDpDCZOcioWyNctxGoc08nQLjkc YdPw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777360826; x=1777965626; 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=lupTwS5/K/xdMFN4T0R1lWQWxBJkMX0Mah0jUIak+cQ=; b=peYJepYuW5bZ0zHS0VX0dgR2N62NfKvr3SrfyhwUEL3GopLpo/UqIRKxXnDMA5IDa+ ITTw50iDj0qZbgrTzUYlXEQZYwD3++TDIEGSTmxlncWmE3w3IW193/y5+Jn2ri0B1rPo gtcyzsnnUZpKKwbfTtI2aJaG6217e7Cai5DYFXxdTwJX69zciwiPolcMQn4ZC05tG87F b9213XQv8beYxNZ8KxXI9Wym59TZUXfZZlR3YjZwa1sJuUB9+yZfLGOop5NbWtQR13qt PgnJ9+et0ecEiS98LmAM+v4ifbo+DXP3Mrz16L4YEW7DjkyAwoPHxw2IzJVU5LIG6Hnc ug+w== X-Forwarded-Encrypted: i=1; AFNElJ99s61C6lQPIev/q4Xo8xwjQ/btpdbqU+qYuqu0I1KMatQJPMFQy3ZBYii1vJf69HcL1DBZyHlhL7f+7YV5XYRJ@vger.kernel.org X-Gm-Message-State: AOJu0YzU7r+mKgerN5mVXA1NLfDnxg9EWImBf/co9fntwjLx3smP3/mF lSaor+0+bSwiGKNWkzKq0rdXn9QLt7tufNW5eJ2D3nfJXi70i6CTRIIFWXG2GRUQpu5rF5Njlpn /g5krsYKcHw== X-Received: from dybnj5.prod.google.com ([2002:a05:7300:d085:b0:2dd:4573:2897]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7300:fd0d:b0:2ea:d965:a4b9 with SMTP id 5a478bee46e88-2ed0a03466amr992245eec.7.1777360825780; Tue, 28 Apr 2026 00:20:25 -0700 (PDT) Date: Tue, 28 Apr 2026 00:18:38 -0700 In-Reply-To: <20260428071903.1886173-1-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: <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: <20260428071903.1886173-34-irogers@google.com> Subject: [PATCH v8 33/58] perf check-perf-trace: Port check-perf-trace 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" Add a port of the check-perf-trace script that uses the perf python module directly. This approach is significantly faster than using perf script callbacks as it avoids creating intermediate dictionaries for all event fields. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers --- v2: 1. String Match Accuracy: Replaced the substring check for `irq:softirq_entry` events with a robust exact string match. v3: 1. Safe Thread Resolution: Swapped out sample.sample_pid with sample.sample_tid and safeguarded the session process lookup with a try-except block. v4: 1. Git Fixup Cleanup: Squashed the lingering fixup commit from the previous session into its proper patch. v8: - Wrapped session.find_thread in a try-except block to prevent crashing on untracked PIDs. --- tools/perf/python/check-perf-trace.py | 120 ++++++++++++++++++++++++++ 1 file changed, 120 insertions(+) create mode 100755 tools/perf/python/check-perf-trace.py diff --git a/tools/perf/python/check-perf-trace.py b/tools/perf/python/check-perf-trace.py new file mode 100755 index 000000000000..bbcd0c520745 --- /dev/null +++ b/tools/perf/python/check-perf-trace.py @@ -0,0 +1,120 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 +""" +Basic test of Python scripting support for perf. +Ported from tools/perf/scripts/python/check-perf-trace.py +""" + +import argparse +import collections +import perf + +unhandled: collections.defaultdict[str, int] = collections.defaultdict(int) +session = None + +softirq_vecs = { + 0: "HI_SOFTIRQ", + 1: "TIMER_SOFTIRQ", + 2: "NET_TX_SOFTIRQ", + 3: "NET_RX_SOFTIRQ", + 4: "BLOCK_SOFTIRQ", + 5: "IRQ_POLL_SOFTIRQ", + 6: "TASKLET_SOFTIRQ", + 7: "SCHED_SOFTIRQ", + 8: "HRTIMER_SOFTIRQ", + 9: "RCU_SOFTIRQ", +} + +def trace_begin() -> None: + """Called at the start of trace processing.""" + print("trace_begin") + +def trace_end() -> None: + """Called at the end of trace processing.""" + print_unhandled() + +def symbol_str(event_name: str, field_name: str, value: int) -> str: + """Resolves symbol values to strings.""" + if event_name == "irq__softirq_entry" and field_name == "vec": + return softirq_vecs.get(value, str(value)) + return str(value) + +def flag_str(event_name: str, field_name: str, value: int) -> str: + """Resolves flag values to strings.""" + if event_name == "kmem__kmalloc" and field_name == "gfp_flags": + return f"0x{value:x}" + return str(value) + +def print_header(event_name: str, sample: perf.sample_event) -> None: + """Prints common header for events.""" + secs = sample.sample_time // 1000000000 + nsecs = sample.sample_time % 1000000000 + comm = "[unknown]" + try: + if session: + thread = session.find_thread(sample.sample_pid) + if thread: + comm = thread.comm() + except (TypeError, AttributeError): + pass + print(f"{event_name:<20} {sample.sample_cpu:5} {secs:05}.{nsecs:09} " + f"{sample.sample_pid:8} {comm:<20} ", end=' ') + +def print_uncommon(sample: perf.sample_event) -> None: + """Prints uncommon fields for tracepoints.""" + # Fallback to 0 if field not found (e.g. on older kernels or if not tracepoint) + pc = getattr(sample, "common_preempt_count", 0) + flags = getattr(sample, "common_flags", 0) + lock_depth = getattr(sample, "common_lock_depth", 0) + + print(f"common_preempt_count={pc}, common_flags={flags}, " + f"common_lock_depth={lock_depth}, ") + +def irq__softirq_entry(sample: perf.sample_event) -> None: + """Handles irq:softirq_entry events.""" + print_header("irq__softirq_entry", sample) + print_uncommon(sample) + print(f"vec={symbol_str('irq__softirq_entry', 'vec', sample.vec)}") + +def kmem__kmalloc(sample: perf.sample_event) -> None: + """Handles kmem:kmalloc events.""" + print_header("kmem__kmalloc", sample) + print_uncommon(sample) + + print(f"call_site={sample.call_site:d}, ptr={sample.ptr:d}, " + f"bytes_req={sample.bytes_req:d}, bytes_alloc={sample.bytes_alloc:d}, " + f"gfp_flags={flag_str('kmem__kmalloc', 'gfp_flags', sample.gfp_flags)}") + +def trace_unhandled(event_name: str) -> None: + """Tracks unhandled events.""" + unhandled[event_name] += 1 + +def print_unhandled() -> None: + """Prints summary of unhandled events.""" + if not unhandled: + return + print("\nunhandled events:\n") + print(f"{'event':<40} {'count':>10}") + print("---------------------------------------- -----------") + for event_name, count in unhandled.items(): + print(f"{event_name:<40} {count:10}") + +def process_event(sample: perf.sample_event) -> None: + """Callback for processing events.""" + event_name = str(sample.evsel) + if event_name == "evsel(irq:softirq_entry)": + irq__softirq_entry(sample) + elif "evsel(kmem:kmalloc)" in event_name: + kmem__kmalloc(sample) + else: + trace_unhandled(event_name) + +if __name__ == "__main__": + ap = argparse.ArgumentParser() + ap.add_argument("-i", "--input", default="perf.data", help="Input file name") + args = ap.parse_args() + + trace_begin() + session = perf.session(perf.data(args.input), sample=process_event) + session.process_events() + trace_end() -- 2.54.0.545.g6539524ca2-goog