From 5ad7db2c3f941cde3045ce38a9c4c40b0c7d56b9 Mon Sep 17 00:00:00 2001 From: Kan Liang Date: Thu, 5 Sep 2024 10:07:36 -0700 Subject: perf mem: Fix missed p-core mem events on ADL and RPL 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 Signed-off-by: Kan Liang Tested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: Ian Rogers Cc: Jiri Olsa Cc: Namhyung Kim 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 --- tools/perf/util/mem-events.c | 6 ++++-- tools/perf/util/mem-events.h | 2 +- 2 files changed, 5 insertions(+), 3 deletions(-) (limited to 'tools/perf/util') diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c index 17f80013e574..051feb93ed8d 100644 --- a/tools/perf/util/mem-events.c +++ b/tools/perf/util/mem-events.c @@ -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) { diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h index a6fc2a593938..8dc27db9fd52 100644 --- a/tools/perf/util/mem-events.h +++ b/tools/perf/util/mem-events.h @@ -6,7 +6,6 @@ #include 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); -- cgit v1.2.3