Re: [RFC][PATCH 0/6] perf: x86 RDPMC and RDTSC support

[Arun Sharma]

On 12/2/11 2:22 PM, Stephane Eranian wrote:
> Have you tried with inheritance disabled?
> I don't remember if perf stat has it enabled buy default.

Disabling inheritance using the -i switch as in:

(for i in `seq 1 10`; do numactl --cpunodebind 1 perf stat -i -e 
instructions ./lat_ctx -P1 -s32k 4; done)

shows numbers closer to baseline, since the threads used for 
benchmarking are not counting events.

This suggests that:

jump_label_dec(&perf_task_events);

itself doesn't hurt much.

 -Arun
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