From 7c52f10c0d4d8db86ef94b40446efbe291d067dc Mon Sep 17 00:00:00 2001 From: Ian Rogers Date: Wed, 23 Aug 2023 21:13:24 -0700 Subject: perf pmu: Cache JSON events table Cache the JSON events table so that finding it isn't done per event/alias. Change the events table find so that when the PMU is given, if the PMU has no JSON events return null. Update usage to always use the PMU variable. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Gaosheng Cui Cc: Ingo Molnar Cc: James Clark Cc: Jing Zhang Cc: Jiri Olsa Cc: John Garry Cc: Kajol Jain Cc: Kan Liang Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Rob Herring Link: https://lore.kernel.org/r/20230824041330.266337-13-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/pmu-events/jevents.py | 14 ++++++++++++-- tools/perf/tests/pmu-events.c | 2 ++ tools/perf/util/pmu.c | 16 +++++++--------- tools/perf/util/pmu.h | 4 ++++ 4 files changed, 25 insertions(+), 11 deletions(-) (limited to 'tools/perf') diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py index 991fcf6cca64..f07864fabd54 100755 --- a/tools/perf/pmu-events/jevents.py +++ b/tools/perf/pmu-events/jevents.py @@ -948,7 +948,7 @@ const struct pmu_events_table *perf_pmu__find_events_table(struct perf_pmu *pmu) { const struct pmu_events_table *table = NULL; char *cpuid = perf_pmu__getcpuid(pmu); - int i; + size_t i; /* on some platforms which uses cpus map, cpuid can be NULL for * PMUs other than CORE PMUs. @@ -968,7 +968,17 @@ const struct pmu_events_table *perf_pmu__find_events_table(struct perf_pmu *pmu) } } free(cpuid); - return table; + if (!pmu) + return table; + + for (i = 0; i < table->num_pmus; i++) { + const struct pmu_table_entry *table_pmu = &table->pmus[i]; + const char *pmu_name = &big_c_string[table_pmu->pmu_name.offset]; + + if (pmu__name_match(pmu, pmu_name)) + return table; + } + return NULL; } const struct pmu_metrics_table *perf_pmu__find_metrics_table(struct perf_pmu *pmu) diff --git a/tools/perf/tests/pmu-events.c b/tools/perf/tests/pmu-events.c index 34f0de182fa9..4fcb84fd1f65 100644 --- a/tools/perf/tests/pmu-events.c +++ b/tools/perf/tests/pmu-events.c @@ -544,6 +544,7 @@ static int __test_core_pmu_event_aliases(char *pmu_name, int *count) INIT_LIST_HEAD(&pmu->list); pmu->name = strdup(pmu_name); + pmu->events_table = table; pmu_add_cpu_aliases_table(pmu, table); res = pmu_events_table__find_event(table, pmu, "bp_l1_btb_correct", NULL, NULL); @@ -583,6 +584,7 @@ static int __test_uncore_pmu_event_aliases(struct perf_pmu_test_pmu *test_pmu) events_table = find_core_events_table("testarch", "testcpu"); if (!events_table) return -1; + pmu->events_table = events_table; pmu_add_cpu_aliases_table(pmu, events_table); pmu_add_sys_aliases(pmu); diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index bc2dd8f94bcf..685903c1970b 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -522,10 +522,10 @@ static int perf_pmu__new_alias(struct perf_pmu *pmu, int dirfd, const char *name } if (!pe) { /* Update an event from sysfs with json data. */ - const struct pmu_events_table *table = perf_pmu__find_events_table(pmu); - - if (table) - pmu_events_table__find_event(table, pmu, name, update_alias, alias); + if (pmu->events_table) { + pmu_events_table__find_event(pmu->events_table, pmu, name, + update_alias, alias); + } } /* Scan event and remove leading zeroes, spaces, newlines, some @@ -875,13 +875,10 @@ void pmu_add_cpu_aliases_table(struct perf_pmu *pmu, const struct pmu_events_tab static void pmu_add_cpu_aliases(struct perf_pmu *pmu) { - const struct pmu_events_table *table; - - table = perf_pmu__find_events_table(pmu); - if (!table) + if (!pmu->events_table) return; - pmu_add_cpu_aliases_table(pmu, table); + pmu_add_cpu_aliases_table(pmu, pmu->events_table); } static int pmu_add_sys_aliases_iter_fn(const struct pmu_event *pe, @@ -992,6 +989,7 @@ struct perf_pmu *perf_pmu__lookup(struct list_head *pmus, int dirfd, const char if (pmu->is_uncore) pmu->id = pmu_id(name); pmu->max_precise = pmu_max_precise(dirfd, pmu); + pmu->events_table = perf_pmu__find_events_table(pmu); pmu_add_cpu_aliases(pmu); pmu_add_sys_aliases(pmu); list_add_tail(&pmu->list, pmus); diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h index 2b1730152bc0..6bf0fbde4e85 100644 --- a/tools/perf/util/pmu.h +++ b/tools/perf/util/pmu.h @@ -114,6 +114,10 @@ struct perf_pmu { * from json events in pmu-events.c. */ struct list_head aliases; + /** + * @events_table: The events table for json events in pmu-events.c. + */ + const struct pmu_events_table *events_table; /** @caps_initialized: Has the list caps been initialized? */ bool caps_initialized; /** @nr_caps: The length of the list caps. */ -- cgit v1.2.3