From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BC75A30E0CC; Mon, 25 Aug 2025 18:07:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756145268; cv=none; b=pvfj8+n4AYe69FHxha3z1/C5rD/6oOu+vgTayXtHu07ZXMXabznrg30uCYI9VHHY1tLeJAdBaoQ6CKSEYBMPLBGkizFTWqjy0tsPlQUyuOPC0Y2UsrFm7VIrVOn1urR9nzicnHw0osslVU+2CLVNj5LQf+1Tvss2EFdNhyOjXaI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756145268; c=relaxed/simple; bh=dHV8jrZYjDvOKPpU7q7M3NOePphmj/U1touD8XwK8WM=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=kR2LrlQR38OtGaXMT+5juCj8/kwXocs3YqavN0B0j6O5K6IimFy150ze+e9qu4OO6hM2poCmtcAL2VjVI/WR8wT6+HlJFLQtnrtwIyhnIEU3dQk5BfGCXGWg/ThSCtozPoy3PWV+F4uFICaY1G6wFnLGoyTXFuDK3V7ttrSoISY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=iNsLHqEI; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="iNsLHqEI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 79E0DC2BCB2; Mon, 25 Aug 2025 18:07:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1756145268; bh=dHV8jrZYjDvOKPpU7q7M3NOePphmj/U1touD8XwK8WM=; h=Date:From:To:Cc:Subject:References:From; b=iNsLHqEIVJRNJj0UnjvDIKRcBZeBKNeiL6xKpVt3aFUGztRznIGSBZ3HCp/7cV3l2 0Br8tJ2V2SKfKpFv3HD3MJHpy2T6BfdNSWPqx4DgIfTFilhYnB9FJeHvgtIKI9V+2S J+FVfjw/eZeDk7CgsJ6Djdwei5N3XP0yUEGo92/QGfGhy+rPKBdZvCc1hpL5BOItsf ZSejP/3m44qa5IoDZllBWyeqqoZWxYaSz/k7IKte4AAf+92Wih229IAAWFCqQ+eEup LmLCNWuCkuXEpU4sns/bbZSnbgCZRgN1qdM4Wi4yLzlMqNIEqFQh1owUV/EQZOiDNZ S3oYdBY32TEmw== Received: from rostedt by gandalf with local (Exim 4.98.2) (envelope-from ) id 1uqbbu-00000002n64-2xLL; Mon, 25 Aug 2025 14:08:02 -0400 Message-ID: <20250825180802.557798597@kernel.org> User-Agent: quilt/0.68 Date: Mon, 25 Aug 2025 14:06:45 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org, x86@kernel.org Cc: Masami Hiramatsu , Mathieu Desnoyers , Josh Poimboeuf , Peter Zijlstra , Ingo Molnar , Jiri Olsa , Arnaldo Carvalho de Melo , Namhyung Kim , Thomas Gleixner , Andrii Nakryiko , Indu Bhagat , "Jose E. Marchesi" , Beau Belgrave , Jens Remus , Linus Torvalds , Andrew Morton , Jens Axboe , Florian Weimer , Sam James Subject: [PATCH v15 7/8] perf script: Display PERF_RECORD_CALLCHAIN_DEFERRED References: <20250825180638.877627656@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 From: Namhyung Kim Handle the deferred callchains in the script output. $ perf script perf 801 [000] 18.031793: 1 cycles:P: ffffffff91a14c36 __intel_pmu_enable_all.isra.0+0x56 ([kernel.kallsyms]) ffffffff91d373e9 perf_ctx_enable+0x39 ([kernel.kallsyms]) ffffffff91d36af7 event_function+0xd7 ([kernel.kallsyms]) ffffffff91d34222 remote_function+0x42 ([kernel.kallsyms]) ffffffff91c1ebe1 generic_exec_single+0x61 ([kernel.kallsyms]) ffffffff91c1edac smp_call_function_single+0xec ([kernel.kallsyms]) ffffffff91d37a9d event_function_call+0x10d ([kernel.kallsyms]) ffffffff91d33557 perf_event_for_each_child+0x37 ([kernel.kallsyms]) ffffffff91d47324 _perf_ioctl+0x204 ([kernel.kallsyms]) ffffffff91d47c43 perf_ioctl+0x33 ([kernel.kallsyms]) ffffffff91e2f216 __x64_sys_ioctl+0x96 ([kernel.kallsyms]) ffffffff9265f1ae do_syscall_64+0x9e ([kernel.kallsyms]) ffffffff92800130 entry_SYSCALL_64+0xb0 ([kernel.kallsyms]) perf 801 [000] 18.031814: DEFERRED CALLCHAIN 7fb5fc22034b __GI___ioctl+0x3b (/usr/lib/x86_64-linux-gnu/libc.so.6) Signed-off-by: Namhyung Kim Signed-off-by: Josh Poimboeuf Signed-off-by: Steven Rostedt (Google) --- tools/perf/builtin-script.c | 89 +++++++++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c index d9fbdcf72f25..d17e0a3d8567 100644 --- a/tools/perf/builtin-script.c +++ b/tools/perf/builtin-script.c @@ -2484,6 +2484,93 @@ static int process_sample_event(const struct perf_tool *tool, return ret; } +static int process_deferred_sample_event(const struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample, + struct evsel *evsel, + struct machine *machine) +{ + struct perf_script *scr = container_of(tool, struct perf_script, tool); + struct perf_event_attr *attr = &evsel->core.attr; + struct evsel_script *es = evsel->priv; + unsigned int type = output_type(attr->type); + struct addr_location al; + FILE *fp = es->fp; + int ret = 0; + + if (output[type].fields == 0) + return 0; + + /* Set thread to NULL to indicate addr_al and al are not initialized */ + addr_location__init(&al); + + if (perf_time__ranges_skip_sample(scr->ptime_range, scr->range_num, + sample->time)) { + goto out_put; + } + + if (debug_mode) { + if (sample->time < last_timestamp) { + pr_err("Samples misordered, previous: %" PRIu64 + " this: %" PRIu64 "\n", last_timestamp, + sample->time); + nr_unordered++; + } + last_timestamp = sample->time; + goto out_put; + } + + if (filter_cpu(sample)) + goto out_put; + + if (machine__resolve(machine, &al, sample) < 0) { + pr_err("problem processing %d event, skipping it.\n", + event->header.type); + ret = -1; + goto out_put; + } + + if (al.filtered) + goto out_put; + + if (!show_event(sample, evsel, al.thread, &al, NULL)) + goto out_put; + + if (evswitch__discard(&scr->evswitch, evsel)) + goto out_put; + + perf_sample__fprintf_start(scr, sample, al.thread, evsel, + PERF_RECORD_CALLCHAIN_DEFERRED, fp); + fprintf(fp, "DEFERRED CALLCHAIN"); + + if (PRINT_FIELD(IP)) { + struct callchain_cursor *cursor = NULL; + + if (symbol_conf.use_callchain && sample->callchain) { + cursor = get_tls_callchain_cursor(); + if (thread__resolve_callchain(al.thread, cursor, evsel, + sample, NULL, NULL, + scripting_max_stack)) { + pr_info("cannot resolve deferred callchains\n"); + cursor = NULL; + } + } + + fputc(cursor ? '\n' : ' ', fp); + sample__fprintf_sym(sample, &al, 0, output[type].print_ip_opts, + cursor, symbol_conf.bt_stop_list, fp); + } + + fprintf(fp, "\n"); + + if (verbose > 0) + fflush(fp); + +out_put: + addr_location__exit(&al); + return ret; +} + // Used when scr->per_event_dump is not set static struct evsel_script es_stdout; @@ -4080,6 +4167,7 @@ int cmd_script(int argc, const char **argv) perf_tool__init(&script.tool, !unsorted_dump); script.tool.sample = process_sample_event; + script.tool.callchain_deferred = process_deferred_sample_event; script.tool.mmap = perf_event__process_mmap; script.tool.mmap2 = perf_event__process_mmap2; script.tool.comm = perf_event__process_comm; @@ -4106,6 +4194,7 @@ int cmd_script(int argc, const char **argv) script.tool.throttle = process_throttle_event; script.tool.unthrottle = process_throttle_event; script.tool.ordering_requires_timestamps = true; + script.tool.merge_deferred_callchains = false; session = perf_session__new(&data, &script.tool); if (IS_ERR(session)) return PTR_ERR(session); -- 2.50.1