On Tue, Oct 23, 2012 at 03:13:52PM +0200, Peter Zijlstra wrote:
> > @@ -562,6 +565,7 @@ enum perf_event_type {
> > * { u64 stream_id;} && PERF_SAMPLE_STREAM_ID
> > * { u32 cpu, res; } && PERF_SAMPLE_CPU
> > * { u64 period; } && PERF_SAMPLE_PERIOD
> > + * { u64 weight; } && PERF_SAMPLE_WEIGHT
> > *
> > * { struct read_format values; } && PERF_SAMPLE_READ
> > *
>
> So the only issues I have are that his makes every sample more expensive
> by having to 0 out that weight data and the sample placement.
It's only reported when explicitely enabled (-W). So most users
shouldn't see any overhead (except two untaken if()s or so)
-Andi
--
a...@linux.intel.com -- Speaking for myself only.
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