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 6483D39B4AF for ; Sat, 25 Apr 2026 22:42:39 +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=1777156961; cv=none; b=iyQqAM3P/a6B4Ai36cxsXVbyVrfdJlzqoFaeknERnbwHeQBpgAoP1D+OAR4e4LEmL3QGLAMr1BJyV9XVhT5KSnnC1s4N+oepVUNrUnA1lepWtsL0k4CMlijE2U+eU+paZJNYkh/NIZ6/TA1GaFNtMZ3yZ1UZ3Zmvd1whU3qOWog= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777156961; c=relaxed/simple; bh=hDYhFYuDoPCefdlf2OIwEe6ysT4MEKgdLebygFtbti8=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=um7Q9069AiMw96Jd09kDgHwZAiycOUjczwgTN5R3NRqN6AH7Klzo1WzzvdXX45Ye74dutvqRj4kNKrK9yUJuZGYxjQA7aHXfl1xGg8LFZ3+jrvcxBp7AHrAqH0V4fxKnj6qvnbQDwmlHD/cMq4KaR2PURHx6e/LqHrEvDfjqsm8= 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=qqW1O0DV; 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="qqW1O0DV" Received: by mail-dy1-f202.google.com with SMTP id 5a478bee46e88-2eaed3d96d7so857354eec.0 for ; Sat, 25 Apr 2026 15:42:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1777156958; x=1777761758; 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=ERRU3KdUiox4uEsWs/CeTXwwWIrylXGw9vYnzrPC1Tw=; b=qqW1O0DVM0ww+eNDCjEapdThKBfjtKg+BPOi8c4Bo6uj4GP1hQvByLiFqDMRioGBPR jFf01sGssf6u2FCEu7RhXXQcTcOHmjMf/ol1gnzr9PtUgmxgmuMNK/HK7zPfV1uYE+Ae RsTExx7A+BFu2iYvbVUa6UvTFpKjvwRg5rlFSiLr5G26KmqeCt4nQ0DxTgrKhT22k1Ln BQ9uglzJsXOpojH82uF6+7o3+ctnkbJlCjHoY0FnR0UzOsCcF7wwNEqbceo28hwe3q9X sSu0GJqzsnxdqCQtU70W9U3dCvG0VLGJPu1zDmpbCcFK5WcMmMc8M4sjb130WCZUh8qn DEQA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777156958; x=1777761758; 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=ERRU3KdUiox4uEsWs/CeTXwwWIrylXGw9vYnzrPC1Tw=; b=HNap7qydml70n0LF2L/os+aArO/N4u+9EW6oBDOxR/K6dUT4KKnscMDPU+pw6mSUW2 AB9V77yY31xCv8VuuEqLwQaAMFG0H4iwcDBTbf4cWQ5v6TBz7noRfokowQZSEx91Gmt/ VkYtZnW/rdrX0dVk7doP7u/tLd0dyzsZNF7aZw0uNbOrKGWAl4ToTvo+4klFlBNWxLXD Z3g+oqS9kM4rOwkiYp7bO4GIxXhNUqBsDMRN4rkWcBxDOcjfswI/obIhum81nHuMwBaE GPKLsVfMC+bc7yDj0h62P2k1qMufuaSxosIhSuaM/LSD49Y6y9YccRFkb15H207x48SB wS7w== X-Forwarded-Encrypted: i=1; AFNElJ93Pftlxkd9wguSZ+nK1aM7pyM59M2sHxcK4mArH4NLN8hQ7Y81Q51d6VHuVn0dT3K3akMUdlsi/RVpMjk=@vger.kernel.org X-Gm-Message-State: AOJu0Yz248WnRAjMDaIoe0n3tGTDI+a7ZBcdQl/DrrTJ8VEmaofsE+9x WW2Szsr/dFr2BO+1Bv8tzMVu8NMaNpXlRpZfSRi7RxbokS4VoM6vj6AiGYzJFTeJGLC5M0fXFvN gx3PTCsBbKA== X-Received: from dycoy3.prod.google.com ([2002:a05:7301:fc03:b0:2e0:fe68:96c7]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7300:fd09:b0:2da:d4b4:c85a with SMTP id 5a478bee46e88-2e464dad10cmr17824799eec.11.1777156958365; Sat, 25 Apr 2026 15:42:38 -0700 (PDT) Date: Sat, 25 Apr 2026 15:40:58 -0700 In-Reply-To: <20260425224125.160890-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@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: <20260425224125.160890-34-irogers@google.com> Subject: [PATCH v7 33/59] perf check-perf-trace: Port check-perf-trace 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" 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. --- tools/perf/python/check-perf-trace.py | 113 ++++++++++++++++++++++++++ 1 file changed, 113 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..7c1c7632a091 --- /dev/null +++ b/tools/perf/python/check-perf-trace.py @@ -0,0 +1,113 @@ +#!/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 = session.find_thread(sample.sample_pid).comm() if session else "[unknown]" + 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