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Subject[tip:perf/core] perf pmu: Only print Using CPUID message once
Commit-ID:  fb967063699e25ae73f0991672f99bd7104f70c8
Gitweb: http://git.kernel.org/tip/fb967063699e25ae73f0991672f99bd7104f70c8
Author: Andi Kleen <ak@linux.intel.com>
AuthorDate: Thu, 13 Oct 2016 14:15:24 -0700
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Mon, 24 Oct 2016 11:07:41 -0300

perf pmu: Only print Using CPUID message once

With uncore event aliases which are duplicated over multiple PMUs the
"Using CPUID" message with -v could be printed many times. Only print
it once.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/1476393332-20732-3-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.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 b1474dc..d7174f3 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -504,6 +504,7 @@ static void pmu_add_cpu_aliases(struct list_head *head)
struct pmu_events_map *map;
struct pmu_event *pe;
char *cpuid;
+ static bool printed;

cpuid = getenv("PERF_CPUID");
if (cpuid)
@@ -513,7 +514,10 @@ static void pmu_add_cpu_aliases(struct list_head *head)
if (!cpuid)
return;

- pr_debug("Using CPUID %s\n", cpuid);
+ if (!printed) {
+ pr_debug("Using CPUID %s\n", cpuid);
+ printed = true;
+ }

i = 0;
while (1) {
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