6.11-stable review patch. If anyone has any objections, please let me know.
------------------
From: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
[ Upstream commit 6e05d28ff232cf445cc6ae59336b7f2081ef9b96 ]
The current perf_pmu__mem_events_init() only checks the availability of
the mem_events for the first eligible PMU. It works for non-hybrid
machines and hybrid machines that have the same mem_events.
However, it may bring issues if a hybrid machine has a different
mem_events on different PMU, e.g., Alder Lake and Raptor Lake. A
mem-loads-aux event is only required for the p-core. The mem_events on
both e-core and p-core should be checked and marked.
The issue was not found, because it's hidden by another bug, which only
records the mem-events for the e-core. The wrong check for the p-core
events didn't yell.
Fixes: abbdd79b786e036e ("perf mem: Clean up perf_mem_events__name()")
Signed-off-by: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240905170737.4070743-1-kan.liang@xxxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 | 2 +-
4 files changed, 16 insertions(+), 4 deletions(-)
diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index c157bd31f2e5a..0b2cb59212938 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -3266,7 +3266,7 @@ static int perf_c2c__record(int argc, const char **argv)
return -1;
}
- if (perf_pmu__mem_events_init(pmu)) {
+ if (perf_pmu__mem_events_init()) {
pr_err("failed: memory events not supported\n");
return -1;
}
diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index 93413cfcd585a..7fdbaaed14af2 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -97,7 +97,7 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
return -1;
}
- if (perf_pmu__mem_events_init(pmu)) {
+ if (perf_pmu__mem_events_init()) {
pr_err("failed: memory events not supported\n");
return -1;
}
diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index be048bd02f36c..17f80013e5743 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -192,7 +192,7 @@ static bool perf_pmu__mem_events_supported(const char *mnt, struct perf_pmu *pmu
return !stat(path, &st);
}
-int perf_pmu__mem_events_init(struct perf_pmu *pmu)
+static int __perf_pmu__mem_events_init(struct perf_pmu *pmu)
{
const char *mnt = sysfs__mount();
bool found = false;
@@ -219,6 +219,18 @@ int perf_pmu__mem_events_init(struct perf_pmu *pmu)
return found ? 0 : -ENOENT;
}
+int perf_pmu__mem_events_init(void)
+{
+ struct perf_pmu *pmu = NULL;
+
+ while ((pmu = perf_pmus__scan_mem(pmu)) != NULL) {
+ if (__perf_pmu__mem_events_init(pmu))
+ return -ENOENT;
+ }
+
+ return 0;
+}
+
void perf_pmu__mem_events_list(struct perf_pmu *pmu)
{
int j;
diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h
index ca31014d7934f..a6fc2a5939388 100644
--- a/tools/perf/util/mem-events.h
+++ b/tools/perf/util/mem-events.h
@@ -30,7 +30,7 @@ extern unsigned int perf_mem_events__loads_ldlat;
extern struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX];
int perf_pmu__mem_events_parse(struct perf_pmu *pmu, const char *str);
-int perf_pmu__mem_events_init(struct perf_pmu *pmu);
+int perf_pmu__mem_events_init(void);
struct perf_mem_event *perf_pmu__mem_events_ptr(struct perf_pmu *pmu, int i);
struct perf_pmu *perf_mem_events_find_pmu(void);
--
2.43.0
