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perf mem: Fix missed p-core mem events on ADL and RPL

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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@kernel.org>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Closes: https://lore.kernel.org/lkml/Zthu81fA3kLC2CS2@x1/
Link: https://lore.kernel.org/r/20240905170737.4070743-2-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Kan Liang 2024-09-05 10:07:36 -07:00 committed by Arnaldo Carvalho de Melo
parent 6e05d28ff2
commit 5ad7db2c3f
4 changed files with 15 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
tools/perf/builtin-c2c.c
View File

@ -3285,19 +3285,15 @@ 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";

17
tools/perf/builtin-mem.c
View File

@ -117,22 +117,17 @@ 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";

6
tools/perf/util/mem-events.c
View File

@ -29,6 +29,8 @@ 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];
@ -163,7 +165,7 @@ 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);
@ -261,7 +263,7 @@ 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) {

2
tools/perf/util/mem-events.h
View File

@ -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);