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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E9B09C77B75 for ; Mon, 15 May 2023 16:55:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229854AbjEOQzj (ORCPT ); Mon, 15 May 2023 12:55:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58724 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243135AbjEOQzT (ORCPT ); Mon, 15 May 2023 12:55:19 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B7F286EAF for ; Mon, 15 May 2023 09:55:17 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 4C5A4629ED for ; Mon, 15 May 2023 16:55:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3A027C433D2; Mon, 15 May 2023 16:55:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1684169716; bh=8z5yXFlNasZ1rri+oVWZ3attzAR6SXce5X0Om3gSaCU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MEQgQi4TRNENaBUkazrc6doH/KQ78IRHmQ07zhbzkdEV1qRyspBqH+0+nrFAILIQC DbX/7DCyFgmRGSx/ImmvQdRKrBupzkzg2o26zIvLODUNlWywekEACWLbzjNDUjdTyJ kM8Tq2nICOAqeqdNXiDHNibfPc4v0BhDzLWlLH+Y= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Song Liu , Dmitrii Dolgov <9erthalion6@gmail.com>, Ian Rogers , Ingo Molnar , Jiri Olsa , Namhyung Kim , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH 6.3 120/246] perf stat: Separate bperf from bpf_profiler Date: Mon, 15 May 2023 18:25:32 +0200 Message-Id: <20230515161726.169240860@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230515161722.610123835@linuxfoundation.org> References: <20230515161722.610123835@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dmitrii Dolgov <9erthalion6@gmail.com> [ Upstream commit ecc68ee216c6c5b2f84915e1441adf436f1b019b ] It seems that perf stat -b doesn't produce any results: $ perf stat -e cycles -b 4 -I 10000 -vvv Control descriptor is not initialized cycles: 0 0 0 time counts unit events 10.007641640 cycles Looks like this happens because fentry/fexit progs are getting loaded, but the corresponding perf event is not enabled and not added into the events bpf map. I think there is some mixing up between two type of bpf support, one for bperf and one for bpf_profiler. Both are identified via evsel__is_bpf, based on which perf events are enabled, but for the latter (bpf_profiler) a perf event is required. Using evsel__is_bperf to check only bperf produces expected results: $ perf stat -e cycles -b 4 -I 10000 -vvv Control descriptor is not initialized ------------------------------------------------------------ perf_event_attr: size 136 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 3 ------------------------------------------------------------ [...perf_event_attr for other CPUs...] ------------------------------------------------------------ cycles: 309426 169009 169009 time counts unit events 10.010091271 309426 cycles The final numbers correspond (at least in the level of magnitude) to the same metric obtained via bpftool. Fixes: 112cb56164bc2108 ("perf stat: Introduce config stat.bpf-counter-events") Reviewed-by: Song Liu Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> Tested-by: Song Liu Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Cc: Song Liu Link: https://lore.kernel.org/r/20230412182316.11628-1-9erthalion6@gmail.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/builtin-stat.c | 4 ++-- tools/perf/util/evsel.h | 5 +++++ 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index fa7c40956d0fa..eeba93ae3b584 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -773,7 +773,7 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx) counter->reset_group = false; if (bpf_counter__load(counter, &target)) return -1; - if (!evsel__is_bpf(counter)) + if (!(evsel__is_bperf(counter))) all_counters_use_bpf = false; } @@ -789,7 +789,7 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx) if (counter->reset_group || counter->errored) continue; - if (evsel__is_bpf(counter)) + if (evsel__is_bperf(counter)) continue; try_again: if (create_perf_stat_counter(counter, &stat_config, &target, diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 24cb807ef6ce0..1a7358b46ad4e 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -267,6 +267,11 @@ static inline bool evsel__is_bpf(struct evsel *evsel) return evsel->bpf_counter_ops != NULL; } +static inline bool evsel__is_bperf(struct evsel *evsel) +{ + return evsel->bpf_counter_ops != NULL && list_empty(&evsel->bpf_counter_list); +} + #define EVSEL__MAX_ALIASES 8 extern const char *const evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX][EVSEL__MAX_ALIASES]; -- 2.39.2