[PATCH v1 1/5] perf util: Check mem-loads auxiliary event

From: Jin Yao
Date: Thu May 20 2021 - 03:02:12 EST


For some platforms, an auxiliary event has to be enabled
simultaneously with the load latency event.

For Alderlake, the auxiliary event is created in "cpu_core" pmu.

So first we need to check the existing of "cpu_core" pmu
and then check if this pmu has auxiliary event.

Signed-off-by: Jin Yao <yao.jin@xxxxxxxxxxxxxxx>
---
tools/perf/arch/x86/util/mem-events.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tools/perf/arch/x86/util/mem-events.c b/tools/perf/arch/x86/util/mem-events.c
index 588110fd8904..e79232e3f2a0 100644
--- a/tools/perf/arch/x86/util/mem-events.c
+++ b/tools/perf/arch/x86/util/mem-events.c
@@ -11,8 +11,13 @@ static bool mem_loads_name__init;

bool is_mem_loads_aux_event(struct evsel *leader)
{
- if (!pmu_have_event("cpu", "mem-loads-aux"))
- return false;
+ if (perf_pmu__find("cpu")) {
+ if (!pmu_have_event("cpu", "mem-loads-aux"))
+ return false;
+ } else if (perf_pmu__find("cpu_core")) {
+ if (!pmu_have_event("cpu_core", "mem-loads-aux"))
+ return false;
+ }

return leader->core.attr.config == MEM_LOADS_AUX;
}
--
2.17.1