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    Subject[PATCH 26/37] perf pmu: Only print Using CPUID message once
    Date
    From: Andi Kleen <ak@linux.intel.com>

    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 b1474dcadfa2..d7174f340b53 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) {
    --
    2.7.4
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