linux-kernel - [PATCH v2 1/8] perf tools: Check mem-loads auxiliary event

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Date:   Thu, 27 May 2021 08:16:03 +0800
From:   Jin Yao <yao.jin@...ux.intel.com>
To:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com
Cc:     Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com,
        Jin Yao <yao.jin@...ux.intel.com>
Subject: [PATCH v2 1/8] perf tools: Check mem-loads auxiliary event

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@...ux.intel.com>
---
v2:
 - No change.

 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