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    SubjectRE: [PATCH V2 04/13] perf/core: output multiplexing overhead
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    > On Fri, Dec 02, 2016 at 04:19:12PM -0500, kan.liang@intel.com wrote:
    > > From: Kan Liang <kan.liang@intel.com>
    > >
    > > Multiplexing overhead is one of the key overhead when the number of
    > > events is more than available counters.
    > >
    > > The multiplexing overhead PERF_CORE_MUX_OVERHEAD is a common
    > overhead
    > > type.
    > >
    >
    > > diff --git a/include/uapi/linux/perf_event.h
    > > b/include/uapi/linux/perf_event.h index fe7b1fb..355086f 100644
    > > --- a/include/uapi/linux/perf_event.h
    > > +++ b/include/uapi/linux/perf_event.h
    > > @@ -999,6 +999,7 @@ struct perf_branch_entry {
    > > */
    > > enum perf_record_overhead_type {
    > > PERF_CORE_OVERHEAD = 0,
    > > + PERF_CORE_MUX_OVERHEAD = 0,
    >
    > '0' already had a name ?!

    PERF_CORE_OVERHEAD is only used to indicate the start of core
    overhead type.
    I will use comment line to replace PERF_CORE_OVERHEAD.

    Thanks,
    Kan

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