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perf pmu: Add override support for event list CPUID

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

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lkml.kernel.org/r/1473978296-20712-10-git-send-email-sukadev@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen
2016-09-15 15:24:46 -07:00
committed by Arnaldo Carvalho de Melo
parent 1c5f01fe86
commit fc06e2a5aa
1 changed files with 7 additions and 1 deletions
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8
tools/perf/util/pmu.c
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@@ -501,10 +501,16 @@ static void pmu_add_cpu_aliases(struct list_head *head)
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;
pr_debug("Using CPUID %s\n", cpuid);
i = 0;
while (1) {
map = &pmu_events_map[i++];