[PATCH V4 7/7] perf mem: Clean up perf_pmus__num_mem_pmus()

kan.liang
2024-01-23T18:51:16Z

The number of mem PMUs can be calculated by searching the
perf_pmus__scan_mem().

Remove the ARCH specific perf_pmus__num_mem_pmus()

Tested-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---
tools/perf/arch/x86/util/pmu.c | 10 ----------
tools/perf/builtin-c2c.c | 2 +-
tools/perf/builtin-mem.c | 2 +-
tools/perf/util/mem-events.c | 14 ++++++++++++++
tools/perf/util/mem-events.h | 1 +
tools/perf/util/pmus.c | 6 ------
tools/perf/util/pmus.h | 1 -
7 files changed, 17 insertions(+), 19 deletions(-)

diff --git a/tools/perf/arch/x86/util/pmu.c b/tools/perf/arch/x86/util/pmu.c
index 0f49ff13cfe2..c3d89d6ba1bf 100644
--- a/tools/perf/arch/x86/util/pmu.c
+++ b/tools/perf/arch/x86/util/pmu.c
@@ -42,13 +42,3 @@ void perf_pmu__arch_init(struct perf_pmu *pmu __maybe_unused)
pmu->mem_events = perf_mem_events_intel;
}
}
-
-int perf_pmus__num_mem_pmus(void)
-{
- /* AMD uses IBS OP pmu and not a core PMU for perf mem/c2c */
- if (x86__is_amd_cpu())
- return 1;
-
- /* Intel uses core pmus for perf mem/c2c */
- return perf_pmus__num_core_pmus();
-}
diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 3bcb903b6b38..16b40f5d43db 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -3278,7 +3278,7 @@ static int perf_c2c__record(int argc, const char **argv)
PARSE_OPT_KEEP_UNKNOWN);

/* Max number of arguments multiplied by number of PMUs that can support them. */
- rec_argc = argc + 11 * perf_pmus__num_mem_pmus();
+ rec_argc = argc + 11 * (perf_pmu__mem_events_num_mem_pmus(pmu) + 1);

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 1d92e309c97c..5b851e64e4a1 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -106,7 +106,7 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
PARSE_OPT_KEEP_UNKNOWN);

/* Max number of arguments multiplied by number of PMUs that can support them. */
- rec_argc = argc + 9 * perf_pmus__num_mem_pmus();
+ rec_argc = argc + 9 * (perf_pmu__mem_events_num_mem_pmus(pmu) + 1);

if (mem->cpu_list)
rec_argc += 2;
diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index a20611b4fb1b..637cbd4a7bfb 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -62,6 +62,20 @@ struct perf_pmu *perf_mem_events_find_pmu(void)
return perf_pmus__scan_mem(NULL);
}

+/**
+ * perf_pmu__mem_events_num_mem_pmus - Get the number of mem PMUs since the given pmu
+ * @pmu: Start pmu. If it's NULL, search the entire PMU list.
+ */
+int perf_pmu__mem_events_num_mem_pmus(struct perf_pmu *pmu)
+{
+ int num = 0;
+
+ while ((pmu = perf_pmus__scan_mem(pmu)) != NULL)
+ num++;
+
+ return num;
+}
+
static const char *perf_pmu__mem_events_name(int i, struct perf_pmu *pmu)
{
struct perf_mem_event *e;
diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h
index c97cd3caa766..15d5f0320d27 100644
--- a/tools/perf/util/mem-events.h
+++ b/tools/perf/util/mem-events.h
@@ -43,6 +43,7 @@ int perf_pmu__mem_events_init(struct perf_pmu *pmu);

struct perf_mem_event *perf_pmu__mem_events_ptr(struct perf_pmu *pmu, int i);
struct perf_pmu *perf_mem_events_find_pmu(void);
+int perf_pmu__mem_events_num_mem_pmus(struct perf_pmu *pmu);
bool is_mem_loads_aux_event(struct evsel *leader);

void perf_pmu__mem_events_list(struct perf_pmu *pmu);
diff --git a/tools/perf/util/pmus.c b/tools/perf/util/pmus.c
index ce4931461741..16505071d362 100644
--- a/tools/perf/util/pmus.c
+++ b/tools/perf/util/pmus.c
@@ -345,12 +345,6 @@ const struct perf_pmu *perf_pmus__pmu_for_pmu_filter(const char *str)
return NULL;
}

-int __weak perf_pmus__num_mem_pmus(void)
-{
- /* All core PMUs are for mem events. */
- return perf_pmus__num_core_pmus();
-}
-
/** Struct for ordering events as output in perf list. */
struct sevent {
/** PMU for event. */
diff --git a/tools/perf/util/pmus.h b/tools/perf/util/pmus.h
index 4c67153ac257..94d2a08d894b 100644
--- a/tools/perf/util/pmus.h
+++ b/tools/perf/util/pmus.h
@@ -17,7 +17,6 @@ struct perf_pmu *perf_pmus__scan_core(struct perf_pmu *pmu);

const struct perf_pmu *perf_pmus__pmu_for_pmu_filter(const char *str);

-int perf_pmus__num_mem_pmus(void);
void perf_pmus__print_pmu_events(const struct print_callbacks *print_cb, void *print_state);
bool perf_pmus__have_event(const char *pname, const char *name);
int perf_pmus__num_core_pmus(void);
--
2.35.1