linux-kernel - [PATCH 1/3] perf, tools: Add override support for event list CPUID

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Date:	Sun, 31 May 2015 09:11:34 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	acme@...nel.org
Cc:	jolsa@...hat.com, namhyung@...nel.org, eranian@...gle.com,
	linux-kernel@...r.kernel.org, mingo@...nel.org,
	sukadev@...ux.vnet.ibm.com, Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 1/3] perf, tools: Add override support for event list CPUID

From: Andi Kleen <ak@...ux.intel.com>

Add a PERF_CPUID variable to override the CPUID of the current CPU.
This is useful for testing, so that all event lists can be tested on a single
system.

v2: Fix double free in earlier version.
Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 tools/perf/util/pmu.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 578a537..5c30f89 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -474,7 +474,11 @@ static int pmu_add_cpu_aliases(void *data)
 	struct pmu_event *pe;
 	char *cpuid;
 
-	cpuid = get_cpuid_str();
+	cpuid = getenv("PERF_CPUID");
+	if (cpuid)
+		cpuid = strdup(cpuid);
+	if (!cpuid)
+		cpuid = get_cpuid_str();
 	if (!cpuid)
 		return 0;
 
-- 
2.4.1

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