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Message-Id: <20240510053705.2462258-6-irogers@google.com>
Date: Thu, 9 May 2024 22:37:05 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>,
Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>,
Kan Liang <kan.liang@...ux.intel.com>, Ravi Bangoria <ravi.bangoria@....com>,
James Clark <james.clark@....com>, Yang Jihong <yangjihong@...edance.com>,
Ze Gao <zegao2021@...il.com>, Leo Yan <leo.yan@...ux.dev>, Song Liu <song@...nel.org>,
K Prateek Nayak <kprateek.nayak@....com>, Kaige Ye <ye@...ge.org>,
Yicong Yang <yangyicong@...ilicon.com>, linux-perf-users@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v3 5/5] perf evsel: Remove pmu_name
"evsel->pmu_name" is only ever assigned a strdup of "pmu->name", a
strdup of "evsel->pmu_name" or NULL. As such, prefer to use
"pmu->name" directly and even to directly compare PMUs than PMU
names. For safety, add some additional NULL tests.
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
tools/perf/arch/x86/util/evsel.c | 4 ++--
tools/perf/tests/parse-events.c | 2 +-
tools/perf/util/evlist.c | 3 ++-
tools/perf/util/evsel.c | 7 -------
tools/perf/util/evsel.h | 3 +--
tools/perf/util/metricgroup.c | 4 ++--
tools/perf/util/parse-events.c | 1 -
tools/perf/util/stat-shadow.c | 10 +++++-----
tools/perf/util/stat.c | 2 +-
9 files changed, 14 insertions(+), 22 deletions(-)
diff --git a/tools/perf/arch/x86/util/evsel.c b/tools/perf/arch/x86/util/evsel.c
index 1eaae8819c5e..fe8a817d2061 100644
--- a/tools/perf/arch/x86/util/evsel.c
+++ b/tools/perf/arch/x86/util/evsel.c
@@ -84,7 +84,7 @@ int arch_evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
return scnprintf(bf, size, "%s", event_name);
return scnprintf(bf, size, "%s/%s/",
- evsel->pmu_name ? evsel->pmu_name : "cpu",
+ evsel->pmu ? evsel->pmu->name : "cpu",
event_name);
}
@@ -129,7 +129,7 @@ int arch_evsel__open_strerror(struct evsel *evsel, char *msg, size_t size)
return 0;
if (!evsel->core.attr.precise_ip &&
- !(evsel->pmu_name && !strncmp(evsel->pmu_name, "ibs", 3)))
+ !(evsel->pmu && !strncmp(evsel->pmu->name, "ibs", 3)))
return 0;
/* More verbose IBS errors. */
diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c
index 993e482f094c..c7c0edf3d4ca 100644
--- a/tools/perf/tests/parse-events.c
+++ b/tools/perf/tests/parse-events.c
@@ -730,7 +730,7 @@ static int test__checkevent_pmu_events(struct evlist *evlist)
TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->core.nr_entries);
TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->core.attr.type ||
- strcmp(evsel->pmu_name, "cpu"));
+ strcmp(evsel->pmu->name, "cpu"));
TEST_ASSERT_VAL("wrong exclude_user",
!evsel->core.attr.exclude_user);
TEST_ASSERT_VAL("wrong exclude_kernel",
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index de498ba5ac1c..2e3f4f876792 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -2504,7 +2504,8 @@ void evlist__uniquify_name(struct evlist *evlist)
else
attributes = empty_attributes;
- if (asprintf(&new_name, "%s/%s/%s", pos->pmu_name, pos->name, attributes + 1)) {
+ if (asprintf(&new_name, "%s/%s/%s", pos->pmu ? "" : pos->pmu->name,
+ pos->name, attributes + 1)) {
free(pos->name);
pos->name = new_name;
} else {
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index dfdb60c7a364..96b545f4d8b0 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -292,7 +292,6 @@ void evsel__init(struct evsel *evsel,
evsel->metric_events = NULL;
evsel->per_pkg_mask = NULL;
evsel->collect_stat = false;
- evsel->pmu_name = NULL;
evsel->group_pmu_name = NULL;
evsel->skippable = false;
evsel->alternate_hw_config = PERF_COUNT_HW_MAX;
@@ -390,11 +389,6 @@ struct evsel *evsel__clone(struct evsel *orig)
if (evsel->group_name == NULL)
goto out_err;
}
- if (orig->pmu_name) {
- evsel->pmu_name = strdup(orig->pmu_name);
- if (evsel->pmu_name == NULL)
- goto out_err;
- }
if (orig->group_pmu_name) {
evsel->group_pmu_name = strdup(orig->group_pmu_name);
if (evsel->group_pmu_name == NULL)
@@ -1481,7 +1475,6 @@ void evsel__exit(struct evsel *evsel)
zfree(&evsel->group_name);
zfree(&evsel->name);
zfree(&evsel->filter);
- zfree(&evsel->pmu_name);
zfree(&evsel->group_pmu_name);
zfree(&evsel->unit);
zfree(&evsel->metric_id);
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 46e3589314f1..2f99cc8bfa7d 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -72,7 +72,6 @@ struct evsel {
struct {
char *name;
char *group_name;
- const char *pmu_name;
const char *group_pmu_name;
#ifdef HAVE_LIBTRACEEVENT
struct tep_event *tp_format;
@@ -169,7 +168,7 @@ struct evsel {
unsigned long open_flags;
int precise_ip_original;
- /* for missing_features */
+ /* The PMU the event is from. Used for missing_features, PMU name, etc. */
struct perf_pmu *pmu;
};
diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 9be406524617..b0700db6e1cc 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -297,8 +297,8 @@ static int setup_metric_events(const char *pmu, struct hashmap *ids,
struct expr_id_data *val_ptr;
/* Don't match events for the wrong hybrid PMU. */
- if (!all_pmus && ev->pmu_name && evsel__is_hybrid(ev) &&
- strcmp(ev->pmu_name, pmu))
+ if (!all_pmus && ev->pmu && evsel__is_hybrid(ev) &&
+ strcmp(ev->pmu->name, pmu))
continue;
/*
* Check for duplicate events with the same name. For
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index c72e1722b1fb..01d502d802ee 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -265,7 +265,6 @@ __add_event(struct list_head *list, int *idx,
evsel->core.is_pmu_core = pmu ? pmu->is_core : false;
evsel->auto_merge_stats = auto_merge_stats;
evsel->pmu = pmu;
- evsel->pmu_name = pmu ? strdup(pmu->name) : NULL;
evsel->alternate_hw_config = alternate_hw_config;
if (name)
diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
index ffdd53a07654..7bf39b069c5b 100644
--- a/tools/perf/util/stat-shadow.c
+++ b/tools/perf/util/stat-shadow.c
@@ -566,7 +566,7 @@ static void perf_stat__print_metricgroup_header(struct perf_stat_config *config,
{
bool need_full_name = perf_pmus__num_core_pmus() > 1;
static const char *last_name;
- static const char *last_pmu;
+ static const struct perf_pmu *last_pmu;
char full_name[64];
/*
@@ -577,21 +577,21 @@ static void perf_stat__print_metricgroup_header(struct perf_stat_config *config,
* different metric events.
*/
if (last_name && !strcmp(last_name, name)) {
- if (!need_full_name || !strcmp(last_pmu, evsel->pmu_name)) {
+ if (!need_full_name || last_pmu != evsel->pmu) {
out->print_metricgroup_header(config, ctxp, NULL);
return;
}
}
- if (need_full_name)
- scnprintf(full_name, sizeof(full_name), "%s (%s)", name, evsel->pmu_name);
+ if (need_full_name && evsel->pmu)
+ scnprintf(full_name, sizeof(full_name), "%s (%s)", name, evsel->pmu->name);
else
scnprintf(full_name, sizeof(full_name), "%s", name);
out->print_metricgroup_header(config, ctxp, full_name);
last_name = name;
- last_pmu = evsel->pmu_name;
+ last_pmu = evsel->pmu;
}
/**
diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
index 0bd5467389e4..7c2ccdcc3fdb 100644
--- a/tools/perf/util/stat.c
+++ b/tools/perf/util/stat.c
@@ -553,7 +553,7 @@ static bool evsel__is_alias(struct evsel *evsel_a, struct evsel *evsel_b)
if (evsel__is_clock(evsel_a) != evsel__is_clock(evsel_b))
return false;
- return !!strcmp(evsel_a->pmu_name, evsel_b->pmu_name);
+ return evsel_a->pmu != evsel_b->pmu;
}
static void evsel__merge_aliases(struct evsel *evsel)
--
2.45.0.118.g7fe29c98d7-goog
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