6.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
[ Upstream commit 5ad7db2c3f941cde3045ce38a9c4c40b0c7d56b9 ]
The p-core mem events are missed when launching 'perf mem record' on ADL
and RPL.
root@number:~# perf mem record sleep 1
Memory events are enabled on a subset of CPUs: 16-27
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.032 MB perf.data ]
root@number:~# perf evlist
cpu_atom/mem-loads,ldlat=30/P
cpu_atom/mem-stores/P
dummy:u
A variable 'record' in the 'struct perf_mem_event' is to indicate
whether a mem event in a mem_events[] should be recorded. The current
code only configure the variable for the first eligible PMU.
It's good enough for a non-hybrid machine or a hybrid machine which has
the same mem_events[].
However, if a different mem_events[] is used for different PMUs on a
hybrid machine, e.g., ADL or RPL, the 'record' for the second PMU never
get a chance to be set.
The mem_events[] of the second PMU are always ignored.
'perf mem' doesn't support the per-PMU configuration now. A per-PMU
mem_events[] 'record' variable doesn't make sense. Make it global.
That could also avoid searching for the per-PMU mem_events[] via
perf_pmu__mem_events_ptr every time.
Committer testing:
root@number:~# perf evlist -g
cpu_atom/mem-loads,ldlat=30/P
cpu_atom/mem-stores/P
{cpu_core/mem-loads-aux/,cpu_core/mem-loads,ldlat=30/}
cpu_core/mem-stores/P
dummy:u
root@number:~#
The :S for '{cpu_core/mem-loads-aux/,cpu_core/mem-loads,ldlat=30/}' is
not being added by 'perf evlist -g', to be checked.
Fixes: abbdd79b786e036e ("perf mem: Clean up perf_mem_events__name()")
Reported-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Tested-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Closes: https://lore.kernel.org/lkml/Zthu81fA3kLC2CS2@x1/
Link: https://lore.kernel.org/r/20240905170737.4070743-2-kan.liang@xxxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
tools/perf/builtin-c2c.c | 12 ++++--------
tools/perf/builtin-mem.c | 17 ++++++-----------
tools/perf/util/mem-events.c | 6 ++++--
tools/perf/util/mem-events.h | 2 +-
4 files changed, 15 insertions(+), 22 deletions(-)
diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 0b2cb59212938..7298f36070622 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -3290,19 +3290,15 @@ static int perf_c2c__record(int argc, const char **argv)
* PERF_MEM_EVENTS__LOAD_STORE if it is supported.
*/
if (e->tag) {
- e->record = true;
+ perf_mem_record[PERF_MEM_EVENTS__LOAD_STORE] = true;
rec_argv[i++] = "-W";
} else {
- e = perf_pmu__mem_events_ptr(pmu, PERF_MEM_EVENTS__LOAD);
- e->record = true;
-
- e = perf_pmu__mem_events_ptr(pmu, PERF_MEM_EVENTS__STORE);
- e->record = true;
+ perf_mem_record[PERF_MEM_EVENTS__LOAD] = true;
+ perf_mem_record[PERF_MEM_EVENTS__STORE] = true;
}
}
- e = perf_pmu__mem_events_ptr(pmu, PERF_MEM_EVENTS__LOAD);
- if (e->record)
+ if (perf_mem_record[PERF_MEM_EVENTS__LOAD])
rec_argv[i++] = "-W";
rec_argv[i++] = "-d";
diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index 7fdbaaed14af2..08724fa508e14 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -126,22 +126,17 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
if (e->tag &&
(mem->operation & MEM_OPERATION_LOAD) &&
(mem->operation & MEM_OPERATION_STORE)) {
- e->record = true;
+ perf_mem_record[PERF_MEM_EVENTS__LOAD_STORE] = true;
rec_argv[i++] = "-W";
} else {
- if (mem->operation & MEM_OPERATION_LOAD) {
- e = perf_pmu__mem_events_ptr(pmu, PERF_MEM_EVENTS__LOAD);
- e->record = true;
- }
+ if (mem->operation & MEM_OPERATION_LOAD)
+ perf_mem_record[PERF_MEM_EVENTS__LOAD] = true;
- if (mem->operation & MEM_OPERATION_STORE) {
- e = perf_pmu__mem_events_ptr(pmu, PERF_MEM_EVENTS__STORE);
- e->record = true;
- }
+ if (mem->operation & MEM_OPERATION_STORE)
+ perf_mem_record[PERF_MEM_EVENTS__STORE] = true;
}
- e = perf_pmu__mem_events_ptr(pmu, PERF_MEM_EVENTS__LOAD);
- if (e->record)
+ if (perf_mem_record[PERF_MEM_EVENTS__LOAD])
rec_argv[i++] = "-W";
rec_argv[i++] = "-d";
diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index c844aca0726ce..1f1e1063efe37 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -28,6 +28,8 @@ struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
};
#undef E
+bool perf_mem_record[PERF_MEM_EVENTS__MAX] = { 0 };
+
static char mem_loads_name[100];
static char mem_stores_name[100];
@@ -162,7 +164,7 @@ int perf_pmu__mem_events_parse(struct perf_pmu *pmu, const char *str)
continue;
if (strstr(e->tag, tok))
- e->record = found = true;
+ perf_mem_record[j] = found = true;
}
tok = strtok_r(NULL, ",", &saveptr);
@@ -259,7 +261,7 @@ int perf_mem_events__record_args(const char **rec_argv, int *argv_nr)
for (int j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
e = perf_pmu__mem_events_ptr(pmu, j);
- if (!e->record)
+ if (!perf_mem_record[j])
continue;
if (!e->supported) {
diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h
index a6fc2a5939388..8dc27db9fd52f 100644
--- a/tools/perf/util/mem-events.h
+++ b/tools/perf/util/mem-events.h
@@ -6,7 +6,6 @@
#include <linux/types.h>
struct perf_mem_event {
- bool record;
bool supported;
bool ldlat;
u32 aux_event;
@@ -28,6 +27,7 @@ struct perf_pmu;
extern unsigned int perf_mem_events__loads_ldlat;
extern struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX];
+extern bool perf_mem_record[PERF_MEM_EVENTS__MAX];
int perf_pmu__mem_events_parse(struct perf_pmu *pmu, const char *str);
int perf_pmu__mem_events_init(void);
--
2.43.0
