linux-kernel - [PATCH v2 3/8] perf tools: Support pmu prefix for mem-store event

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Date:   Thu, 27 May 2021 08:16:05 +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 3/8] perf tools: Support pmu prefix for mem-store event

For enabling mem-store event, it doesn't need an auxiliary event.
So just build an event name string with the pmu prefix.

Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
---
v2:
 - New in v2.

 tools/perf/arch/x86/util/mem-events.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/tools/perf/arch/x86/util/mem-events.c b/tools/perf/arch/x86/util/mem-events.c
index f9e444a4fe70..5214370ca4e4 100644
--- a/tools/perf/arch/x86/util/mem-events.c
+++ b/tools/perf/arch/x86/util/mem-events.c
@@ -5,6 +5,7 @@
 
 static char mem_loads_name[100];
 static bool mem_loads_name__init;
+static char mem_stores_name[100];
 
 #define MEM_LOADS_AUX		0x8203
 #define MEM_LOADS_AUX_NAME     "{%s/mem-loads-aux/,%s/mem-loads,ldlat=%u/}:P"
@@ -13,7 +14,7 @@ static bool mem_loads_name__init;
 
 static struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
 	E("ldlat-loads",	"%s/mem-loads,ldlat=%u/P",	"%s/events/mem-loads"),
-	E("ldlat-stores",	"cpu/mem-stores/P",		"cpu/events/mem-stores"),
+	E("ldlat-stores",	"%s/mem-stores/P",		"%s/events/mem-stores"),
 	E(NULL,			NULL,				NULL),
 };
 
@@ -66,5 +67,14 @@ char *perf_mem_events__name(int i, char *pmu_name)
 		return mem_loads_name;
 	}
 
+	if (i == PERF_MEM_EVENTS__STORE) {
+		if (!pmu_name)
+			pmu_name = (char *)"cpu";
+
+		scnprintf(mem_stores_name, sizeof(mem_stores_name),
+			  e->name, pmu_name);
+		return mem_stores_name;
+	}
+
 	return (char *)e->name;
 }
-- 
2.17.1