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 A4876C77B73 for ; Thu, 20 Apr 2023 19:28:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232016AbjDTT2a (ORCPT ); Thu, 20 Apr 2023 15:28:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48762 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230357AbjDTT21 (ORCPT ); Thu, 20 Apr 2023 15:28:27 -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 0374C4210 for ; Thu, 20 Apr 2023 12:28:23 -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 8F80964B76 for ; Thu, 20 Apr 2023 19:28:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9BBCFC433D2; Thu, 20 Apr 2023 19:28:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1682018903; bh=55944/j7amgiAeKBTI7/yyWLkmNNzLaK6Anokxe5UZA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=UHEIDGN/ckNCoTzhWpg8uDJIeLK8fzAJdRmlYUXni4CdthEjeJb3Ihq8HJ68V4NWC 3cRJcF1ETUMxayTUx4XbCGW++nefwIIyrQ4uDNj8bd5RztIuUr+++0+/ZPjso1kirM LdRrrHLPSI0C/AsVR9PoWhyMEgdLWeDLRVF+865ics3gFe4QjA4fa78OYdjxT0vs8p joigN5/lwEbZ6Q9Az7MVR0aLcOyP/3dE6IUbcBrUgmQ6n56yjsy45RHGm1XkGy/qSZ npngawzhe7aewgU3/LGU6NXkVWPgCInWoSFvSBJlRAhCvuNToDXBUtOHySgnFAjOVn ZGu1bdY2XVS0w== Received: by quaco.ghostprotocols.net (Postfix, from userid 1000) id E33BC403C5; Thu, 20 Apr 2023 16:28:19 -0300 (-03) Date: Thu, 20 Apr 2023 16:28:19 -0300 From: Arnaldo Carvalho de Melo To: Linux Kernel Mailing List Cc: Adrian Hunter , Ian Rogers , Jiri Olsa , "Liang, Kan" , Namhyung Kim Subject: Re: [PATCH 1/1] perf evsel: Introduce evsel__name_is() method to check if the evsel name is equal to a given string Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Url: http://acmel.wordpress.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Em Thu, Apr 20, 2023 at 04:10:30PM -0300, Arnaldo Carvalho de Melo escreveu: > Em Thu, Apr 20, 2023 at 03:57:55PM -0300, Arnaldo Carvalho de Melo escreveu: > > This makes the logic a bit clear by avoiding the !strcmp() pattern and > > also a way to intercept the pointer if we need to do extra validation on > > it or to do lazy setting of evsel->name via evsel__name(evsel). > > + this, looking if there are others... Somehow the first message didn't go thru, so below is the combined patch, this is an effort to avoid accessing evsel->name directly as the preferred way to get an evsel name is evsel__name(), so looking for direct access and providing accessors that avoid that. - Arnaldo >From e60455d6a4e35ba0c376966443294586a1adc3ec Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Thu, 20 Apr 2023 15:54:11 -0300 Subject: [PATCH 1/1] perf evsel: Introduce evsel__name_is() method to check if the evsel name is equal to a given string This makes the logic a bit clear by avoiding the !strcmp() pattern and also a way to intercept the pointer if we need to do extra validation on it or to do lazy setting of evsel->name via evsel__name(evsel). Cc: Adrian Hunter Cc: Ian Rogers Cc: Jiri Olsa Cc: "Liang, Kan" Cc: Namhyung Kim Link: https://lore.kernel.org/lkml/ZEGLM8VehJbS0gP2@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/arch/arm64/util/kvm-stat.c | 4 ++-- tools/perf/arch/powerpc/util/kvm-stat.c | 4 ++-- tools/perf/arch/x86/util/kvm-stat.c | 8 ++++---- tools/perf/builtin-kvm.c | 6 +++--- tools/perf/builtin-stat.c | 2 +- tools/perf/tests/expand-cgroup.c | 2 +- tools/perf/tests/parse-events.c | 12 ++++++------ tools/perf/tests/parse-metric.c | 2 +- tools/perf/tests/pmu-events.c | 2 +- tools/perf/util/evsel.c | 7 ++++++- tools/perf/util/evsel.h | 1 + 11 files changed, 28 insertions(+), 22 deletions(-) diff --git a/tools/perf/arch/arm64/util/kvm-stat.c b/tools/perf/arch/arm64/util/kvm-stat.c index 72ca9bb45804d109..6611aa21cba957d9 100644 --- a/tools/perf/arch/arm64/util/kvm-stat.c +++ b/tools/perf/arch/arm64/util/kvm-stat.c @@ -44,14 +44,14 @@ static bool event_begin(struct evsel *evsel, struct perf_sample *sample __maybe_unused, struct event_key *key __maybe_unused) { - return !strcmp(evsel->name, kvm_entry_trace); + return evsel__name_is(evsel, kvm_entry_trace); } static bool event_end(struct evsel *evsel, struct perf_sample *sample, struct event_key *key) { - if (!strcmp(evsel->name, kvm_exit_trace)) { + if (evsel__name_is(evsel, kvm_exit_trace)) { event_get_key(evsel, sample, key); return true; } diff --git a/tools/perf/arch/powerpc/util/kvm-stat.c b/tools/perf/arch/powerpc/util/kvm-stat.c index d04a08c9fd19c58c..ea1220d66b6758b2 100644 --- a/tools/perf/arch/powerpc/util/kvm-stat.c +++ b/tools/perf/arch/powerpc/util/kvm-stat.c @@ -60,13 +60,13 @@ static bool hcall_event_end(struct evsel *evsel, struct perf_sample *sample __maybe_unused, struct event_key *key __maybe_unused) { - return (!strcmp(evsel->name, kvm_events_tp[3])); + return (evsel__name_is(evsel, kvm_events_tp[3])); } static bool hcall_event_begin(struct evsel *evsel, struct perf_sample *sample, struct event_key *key) { - if (!strcmp(evsel->name, kvm_events_tp[2])) { + if (evsel__name_is(evsel, kvm_events_tp[2])) { hcall_event_get_key(evsel, sample, key); return true; } diff --git a/tools/perf/arch/x86/util/kvm-stat.c b/tools/perf/arch/x86/util/kvm-stat.c index ef513def03bac71c..424716518b755915 100644 --- a/tools/perf/arch/x86/util/kvm-stat.c +++ b/tools/perf/arch/x86/util/kvm-stat.c @@ -46,7 +46,7 @@ static bool mmio_event_begin(struct evsel *evsel, return true; /* MMIO write begin event in kernel. */ - if (!strcmp(evsel->name, "kvm:kvm_mmio") && + if (evsel__name_is(evsel, "kvm:kvm_mmio") && evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_WRITE) { mmio_event_get_key(evsel, sample, key); return true; @@ -63,7 +63,7 @@ static bool mmio_event_end(struct evsel *evsel, struct perf_sample *sample, return true; /* MMIO read end event in kernel.*/ - if (!strcmp(evsel->name, "kvm:kvm_mmio") && + if (evsel__name_is(evsel, "kvm:kvm_mmio") && evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_READ) { mmio_event_get_key(evsel, sample, key); return true; @@ -101,7 +101,7 @@ static bool ioport_event_begin(struct evsel *evsel, struct perf_sample *sample, struct event_key *key) { - if (!strcmp(evsel->name, "kvm:kvm_pio")) { + if (evsel__name_is(evsel, "kvm:kvm_pio")) { ioport_event_get_key(evsel, sample, key); return true; } @@ -145,7 +145,7 @@ static bool msr_event_begin(struct evsel *evsel, struct perf_sample *sample, struct event_key *key) { - if (!strcmp(evsel->name, "kvm:kvm_msr")) { + if (evsel__name_is(evsel, "kvm:kvm_msr")) { msr_event_get_key(evsel, sample, key); return true; } diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c index 747d19336340f28f..71165036e4cac89b 100644 --- a/tools/perf/builtin-kvm.c +++ b/tools/perf/builtin-kvm.c @@ -625,7 +625,7 @@ void exit_event_get_key(struct evsel *evsel, bool kvm_exit_event(struct evsel *evsel) { - return !strcmp(evsel->name, kvm_exit_trace); + return evsel__name_is(evsel, kvm_exit_trace); } bool exit_event_begin(struct evsel *evsel, @@ -641,7 +641,7 @@ bool exit_event_begin(struct evsel *evsel, bool kvm_entry_event(struct evsel *evsel) { - return !strcmp(evsel->name, kvm_entry_trace); + return evsel__name_is(evsel, kvm_entry_trace); } bool exit_event_end(struct evsel *evsel, @@ -878,7 +878,7 @@ static bool is_child_event(struct perf_kvm_stat *kvm, return false; for (; child_ops->name; child_ops++) { - if (!strcmp(evsel->name, child_ops->name)) { + if (evsel__name_is(evsel, child_ops->name)) { child_ops->get_key(evsel, sample, key); return true; } diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index d3cbee7460fcc48e..efda63f6bf329b51 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -2170,7 +2170,7 @@ static void setup_system_wide(int forks) evlist__for_each_entry(evsel_list, counter) { if (!counter->core.requires_cpu && - strcmp(counter->name, "duration_time")) { + !evsel__name_is(counter, "duration_time")) { return; } } diff --git a/tools/perf/tests/expand-cgroup.c b/tools/perf/tests/expand-cgroup.c index ec340880a848d907..9c1a1f18db750607 100644 --- a/tools/perf/tests/expand-cgroup.c +++ b/tools/perf/tests/expand-cgroup.c @@ -61,7 +61,7 @@ static int test_expand_events(struct evlist *evlist, i = 0; evlist__for_each_entry(evlist, evsel) { - if (strcmp(evsel->name, ev_name[i % nr_events])) { + if (!evsel__name_is(evsel, ev_name[i % nr_events])) { pr_debug("event name doesn't match:\n"); pr_debug(" evsel[%d]: %s\n expected: %s\n", i, evsel->name, ev_name[i % nr_events]); diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c index 6eb1400443adddee..8068cfd89b84f723 100644 --- a/tools/perf/tests/parse-events.c +++ b/tools/perf/tests/parse-events.c @@ -1401,7 +1401,7 @@ static int test__checkevent_config_symbol(struct evlist *evlist) { struct evsel *evsel = evlist__first(evlist); - TEST_ASSERT_VAL("wrong name setting", strcmp(evsel->name, "insn") == 0); + TEST_ASSERT_VAL("wrong name setting", evsel__name_is(evsel, "insn")); return TEST_OK; } @@ -1409,7 +1409,7 @@ static int test__checkevent_config_raw(struct evlist *evlist) { struct evsel *evsel = evlist__first(evlist); - TEST_ASSERT_VAL("wrong name setting", strcmp(evsel->name, "rawpmu") == 0); + TEST_ASSERT_VAL("wrong name setting", evsel__name_is(evsel, "rawpmu")); return TEST_OK; } @@ -1417,7 +1417,7 @@ static int test__checkevent_config_num(struct evlist *evlist) { struct evsel *evsel = evlist__first(evlist); - TEST_ASSERT_VAL("wrong name setting", strcmp(evsel->name, "numpmu") == 0); + TEST_ASSERT_VAL("wrong name setting", evsel__name_is(evsel, "numpmu")); return TEST_OK; } @@ -1425,7 +1425,7 @@ static int test__checkevent_config_cache(struct evlist *evlist) { struct evsel *evsel = evlist__first(evlist); - TEST_ASSERT_VAL("wrong name setting", strcmp(evsel->name, "cachepmu") == 0); + TEST_ASSERT_VAL("wrong name setting", evsel__name_is(evsel, "cachepmu")); return TEST_OK; } @@ -1438,7 +1438,7 @@ static int test__intel_pt(struct evlist *evlist) { struct evsel *evsel = evlist__first(evlist); - TEST_ASSERT_VAL("wrong name setting", strcmp(evsel->name, "intel_pt//u") == 0); + TEST_ASSERT_VAL("wrong name setting", evsel__name_is(evsel, "intel_pt//u")); return TEST_OK; } @@ -1446,7 +1446,7 @@ static int test__checkevent_complex_name(struct evlist *evlist) { struct evsel *evsel = evlist__first(evlist); - TEST_ASSERT_VAL("wrong complex name parsing", strcmp(evsel->name, "COMPLEX_CYCLES_NAME:orig=cycles,desc=chip-clock-ticks") == 0); + TEST_ASSERT_VAL("wrong complex name parsing", evsel__name_is(evsel, "COMPLEX_CYCLES_NAME:orig=cycles,desc=chip-clock-ticks")); return TEST_OK; } diff --git a/tools/perf/tests/parse-metric.c b/tools/perf/tests/parse-metric.c index c43b056f9fa395f4..1185b79e6274886e 100644 --- a/tools/perf/tests/parse-metric.c +++ b/tools/perf/tests/parse-metric.c @@ -39,7 +39,7 @@ static void load_runtime_stat(struct evlist *evlist, struct value *vals) evlist__for_each_entry(evlist, evsel) { count = find_value(evsel->name, vals); evsel->stats->aggr->counts.val = count; - if (!strcmp(evsel->name, "duration_time")) + if (evsel__name_is(evsel, "duration_time")) update_stats(&walltime_nsecs_stats, count); } } diff --git a/tools/perf/tests/pmu-events.c b/tools/perf/tests/pmu-events.c index 7f8e864525271483..1dff863b9711cf6d 100644 --- a/tools/perf/tests/pmu-events.c +++ b/tools/perf/tests/pmu-events.c @@ -866,7 +866,7 @@ static int test__parsing_callback(const struct pmu_metric *pm, evlist__alloc_aggr_stats(evlist, 1); evlist__for_each_entry(evlist, evsel) { evsel->stats->aggr->counts.val = k; - if (!strcmp(evsel->name, "duration_time")) + if (evsel__name_is(evsel, "duration_time")) update_stats(&walltime_nsecs_stats, k); k++; } diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index a85a987128aad281..81b854650160c2b0 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -821,6 +821,11 @@ const char *evsel__name(struct evsel *evsel) return "unknown"; } +bool evsel__name_is(struct evsel *evsel, const char *name) +{ + return !strcmp(evsel->name, name); +} + const char *evsel__group_pmu_name(const struct evsel *evsel) { const struct evsel *leader; @@ -1146,7 +1151,7 @@ static void evsel__set_default_freq_period(struct record_opts *opts, static bool evsel__is_offcpu_event(struct evsel *evsel) { - return evsel__is_bpf_output(evsel) && !strcmp(evsel->name, OFFCPU_EVENT); + return evsel__is_bpf_output(evsel) && evsel__name_is(evsel, OFFCPU_EVENT); } /* diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 68072ec655ce9fff..1e5d640e4a9bd0f1 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -282,6 +282,7 @@ int arch_evsel__hw_name(struct evsel *evsel, char *bf, size_t size); int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size); const char *evsel__name(struct evsel *evsel); +bool evsel__name_is(struct evsel *evsel, const char *name); const char *evsel__group_pmu_name(const struct evsel *evsel); const char *evsel__metric_id(const struct evsel *evsel); -- 2.39.2