[PATCH v4 24/35] perf mem: Avoid hybrid PMU list

Ian Rogers
2023-05-26T21:56:34Z

Add perf_pmu__num_mem_pmus that scans/counts the number of PMUs for
mem events. Switch perf_pmu__for_each_hybrid_pmu to iterating all PMUs
and only handling is_core ones.

Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
---
tools/perf/builtin-c2c.c | 7 ++-----
tools/perf/builtin-mem.c | 7 ++-----
tools/perf/util/mem-events.c | 20 ++++++++++++++------
tools/perf/util/pmu.c | 17 +++++++++++++++++
tools/perf/util/pmu.h | 1 +
5 files changed, 36 insertions(+), 16 deletions(-)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 08455e26b606..2757ccc19c5e 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -42,7 +42,6 @@
#include "ui/ui.h"
#include "ui/progress.h"
#include "pmu.h"
-#include "pmu-hybrid.h"
#include "string2.h"
#include "util/util.h"

@@ -3259,10 +3258,8 @@ static int perf_c2c__record(int argc, const char **argv)
argc = parse_options(argc, argv, options, record_mem_usage,
PARSE_OPT_KEEP_UNKNOWN);

- if (!perf_pmu__has_hybrid())
- rec_argc = argc + 11; /* max number of arguments */
- else
- rec_argc = argc + 11 * perf_pmu__hybrid_pmu_num();
+ /* Max number of arguments multiplied by number of PMUs that can support them. */
+ rec_argc = argc + 11 * perf_pmu__num_mem_pmus();

rec_argv = calloc(rec_argc + 1, sizeof(char *));
if (!rec_argv)
diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index 65465930ef8e..f4f1ff76d49d 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -18,7 +18,6 @@
#include "util/map.h"
#include "util/symbol.h"
#include "util/pmu.h"
-#include "util/pmu-hybrid.h"
#include "util/sample.h"
#include "util/string2.h"
#include "util/util.h"
@@ -93,10 +92,8 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
argc = parse_options(argc, argv, options, record_mem_usage,
PARSE_OPT_KEEP_UNKNOWN);

- if (!perf_pmu__has_hybrid())
- rec_argc = argc + 9; /* max number of arguments */
- else
- rec_argc = argc + 9 * perf_pmu__hybrid_pmu_num();
+ /* Max number of arguments multiplied by number of PMUs that can support them. */
+ rec_argc = argc + 9 * perf_pmu__num_mem_pmus();

if (mem->cpu_list)
rec_argc += 2;
diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index ed1ee4b05356..c9e422a38258 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -13,7 +13,6 @@
#include "debug.h"
#include "symbol.h"
#include "pmu.h"
-#include "pmu-hybrid.h"

unsigned int perf_mem_events__loads_ldlat = 30;

@@ -120,7 +119,6 @@ int perf_mem_events__init(void)

for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
struct perf_mem_event *e = perf_mem_events__ptr(j);
- struct perf_pmu *pmu;
char sysfs_name[100];

/*
@@ -135,7 +133,12 @@ int perf_mem_events__init(void)
e->sysfs_name, "cpu");
e->supported = perf_mem_event__supported(mnt, sysfs_name);
} else {
- perf_pmu__for_each_hybrid_pmu(pmu) {
+ struct perf_pmu *pmu = NULL;
+
+ while ((pmu = perf_pmu__scan(pmu)) != NULL) {
+ if (!pmu->is_core)
+ continue;
+
scnprintf(sysfs_name, sizeof(sysfs_name),
e->sysfs_name, pmu->name);
e->supported |= perf_mem_event__supported(mnt, sysfs_name);
@@ -170,9 +173,12 @@ static void perf_mem_events__print_unsupport_hybrid(struct perf_mem_event *e,
{
const char *mnt = sysfs__mount();
char sysfs_name[100];
- struct perf_pmu *pmu;
+ struct perf_pmu *pmu = NULL;
+
+ while ((pmu = perf_pmu__scan(pmu)) != NULL) {
+ if (!pmu->is_core)
+ continue;

- perf_pmu__for_each_hybrid_pmu(pmu) {
scnprintf(sysfs_name, sizeof(sysfs_name), e->sysfs_name,
pmu->name);
if (!perf_mem_event__supported(mnt, sysfs_name)) {
@@ -210,7 +216,9 @@ int perf_mem_events__record_args(const char **rec_argv, int *argv_nr,
return -1;
}

- perf_pmu__for_each_hybrid_pmu(pmu) {
+ while ((pmu = perf_pmu__scan(pmu)) != NULL) {
+ if (!pmu->is_core)
+ continue;
rec_argv[i++] = "-e";
s = perf_mem_events__name(j, pmu->name);
if (s) {
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 5a7bfbf621d0..65daa0cc71d6 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1660,6 +1660,23 @@ bool perf_pmu__auto_merge_stats(const struct perf_pmu *pmu)
return !is_pmu_hybrid(pmu->name);
}

+static bool perf_pmu__is_mem_pmu(const struct perf_pmu *pmu)
+{
+ return pmu->is_core;
+}
+
+int perf_pmu__num_mem_pmus(void)
+{
+ struct perf_pmu *pmu = NULL;
+ int count = 0;
+
+ while ((pmu = perf_pmu__scan(pmu)) != NULL) {
+ if (perf_pmu__is_mem_pmu(pmu))
+ count++;
+ }
+ return count;
+}
+
static bool pmu_alias_is_duplicate(struct sevent *alias_a,
struct sevent *alias_b)
{
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index af10d137e2b5..5f5de7c20ab6 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -231,6 +231,7 @@ bool is_pmu_hybrid(const char *name);
bool perf_pmu__supports_legacy_cache(const struct perf_pmu *pmu);
bool perf_pmu__supports_wildcard_numeric(const struct perf_pmu *pmu);
bool perf_pmu__auto_merge_stats(const struct perf_pmu *pmu);
+int perf_pmu__num_mem_pmus(void);
void print_pmu_events(const struct print_callbacks *print_cb, void *print_state);
bool pmu_have_event(const char *pname, const char *name);

--
2.41.0.rc0.172.g3f132b7071-goog