From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 62F3AFF885C for ; Sat, 25 Apr 2026 22:44:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:Cc:To:From: Subject:Message-ID:References:Mime-Version:In-Reply-To:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ERRU3KdUiox4uEsWs/CeTXwwWIrylXGw9vYnzrPC1Tw=; b=li5ZSurSIx02PelAzIqO+Bcd3S bgb7EebjNYhVxnApWWXBIk7AOgf6G0jcMyhbiMfuv+st9hW1jbMvXagJMtrwSzweMTzL5mOwzBQgp 6IT57BvJJ5VdSrX5f5/VLNtRI74Xl7R74kUC3eIMIkDCv7RoJNSCaWzrG/FagSZsASwhapJnkXSgT X0dwqYil8EIHeIgTxK9FR+CcNNzpP8+EAHG1oBGxhivEtwBkDD8uTfXBzBWx7Yd9NFpoyO02k9vTG X/dGWOIw2y+es5x/TrlZuigEoFKPUJhQvgr12nIRX/j6q1pl5m3s9Xj9HG3xni2ApfN62wFs1k8Od K8QAPsXw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wGljU-0000000EvM0-0aou; Sat, 25 Apr 2026 22:44:16 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wGliY-0000000EuTl-0e88 for linux-arm-kernel@bombadil.infradead.org; Sat, 25 Apr 2026 22:43:18 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:Cc:To:From:Subject: Message-ID:References:Mime-Version:In-Reply-To:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=ERRU3KdUiox4uEsWs/CeTXwwWIrylXGw9vYnzrPC1Tw=; b=UHvg0UuBBJtf07IpnhQ++9ul43 d3yJwl2LIPAcYSqsARkiY/YiogB7eZTNBsih8peHAyEVDD5y2zgrbZaj6fwZUyX13XxTVDbPbZEWT LX1k1hfrkicf4npzGpGsTzYEvf0ndEvn7htMT0w7W8Rlh/24mkE3H0l1YgBbN20+/zdZywizi3FGS 5uF82WFvcRe4v3tmxSFt0aqyVNaIkkX3w0ylhMhlJYajHOSPxhwaPp7dY2IbUEaDkMvdnQnONel2D HIzYtsh3i/AVmU37E1IJnhAS7BOq5THqH2bvRk+FOoGOfihLsHVb5t9u7Be50CA0RXwfrmgrXZnmE L0/WYLOw==; Received: from mail-dy1-f201.google.com ([74.125.82.201]) by desiato.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wGliP-0000000GKxl-1vc6 for linux-arm-kernel@lists.infradead.org; Sat, 25 Apr 2026 22:43:15 +0000 Received: by mail-dy1-f201.google.com with SMTP id 5a478bee46e88-2eaed3d96d7so857352eec.0 for ; Sat, 25 Apr 2026 15:42:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1777156958; x=1777761758; darn=lists.infradead.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=GreD2cJYHTEgiT/orKoolDX3tqGTpH9JjDa3ANtmL8Iz4F/e+YdY/zDDoB5CjbbdZt TNoI/gK0Y4UoQIrq+58bOb/2YbJ8IN2kWhD+fiT8ZfIRFLvXP4yw19cuSCc+8Tt0c532 1u4W2rwkg+b/jOpgvvMCgMRqYYGTOR68jfk03yJyTNfcg5fN3MrNQRKZdu8QZLFjEPZ0 emwy70h7vWZtvbNa6yLrdvP3XvbRCKUXmU5z8yUa8zlHTCQ+M/8pfbeIIaszzYujQ9ao iqG9D3TcqcG5D1ALWLmzhLjM9+vR4Ym0I76tKxPXB70PqWXjw0kL2e9mz6D0Y5XZJqCq /MsQ== 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=AuciRLn7MEKi3Kg5JDt97uMCYqHeGU06ohfyaroOd4TbuSL2vwMmpu2GWQcVk0zTW7 PdgYJHEH4tW9oRd5jdT7LXvKWzdqs7yiIyDa4sy1JlAIODDt6hs0j8nos8D5JOchp6Vg CdoqvPV0AG9/mZlgr5L48TPd5zNdU42wbgYov8XNSiMev4v+hhzS5jU+XcZfE/AexiO1 BWidDCXKVmQmO1DRuNujM8TnCAnM0kkNJWqR91sY3wN9zcwu4LBapRvpMmbogsaRXQfP +vLQ87HB/quu21CpcsfH0Dk9RBkr9Tq70+5o/ZAjWRwVPYp2nF2zRUyTXCYr6I3FU6V7 1fSw== X-Forwarded-Encrypted: i=1; AFNElJ+V3yBR4bt2DV4uMnMgYUt74dL4cjMj5toRvR6r+0rdQZCgOCaF1S/jjQPdbAvi3SlkjkvhLKBE9anFVLOvK3om@lists.infradead.org X-Gm-Message-State: AOJu0YxG27W82wWAxOIbe/mtflevnyAz8Th9oOlaw+psHkLwmo4kye/w 9hF31k1qh/qKFX3S/E+V1hOsmQFCd//FP7H6D0Ry6s02jL7OeG0k+Y9wXEcmknChm0ixVpFWC63 y4QFB99eO1g== 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> 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" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260425_234313_745040_B3AA29C1 X-CRM114-Status: GOOD ( 16.11 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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