Re: [PATCH] perf/bench-futex: Avoid worker cacheline bouncing

2016-10-19 Thread Davidlohr Bueso
On Wed, 19 Oct 2016, Sebastian Andrzej Siewior wrote: On 2016-10-19 10:59:33 [-0700], Davidlohr Bueso wrote: Sebastian noted that overhead for worker thread ops (throughput) accounting was producing 'perf' to appear in the profiles, consuming a non-trivial (ie 13%) amount of CPU. This is due

Re: [PATCH] perf/bench-futex: Avoid worker cacheline bouncing

2016-10-19 Thread Davidlohr Bueso
On Wed, 19 Oct 2016, Sebastian Andrzej Siewior wrote: On 2016-10-19 10:59:33 [-0700], Davidlohr Bueso wrote: Sebastian noted that overhead for worker thread ops (throughput) accounting was producing 'perf' to appear in the profiles, consuming a non-trivial (ie 13%) amount of CPU. This is due

Re: [PATCH] perf/bench-futex: Avoid worker cacheline bouncing

2016-10-19 Thread Sebastian Andrzej Siewior
On 2016-10-19 10:59:33 [-0700], Davidlohr Bueso wrote: > Sebastian noted that overhead for worker thread ops (throughput) > accounting was producing 'perf' to appear in the profiles, consuming > a non-trivial (ie 13%) amount of CPU. This is due to cacheline > bouncing due to the increment of

Re: [PATCH] perf/bench-futex: Avoid worker cacheline bouncing

2016-10-19 Thread Sebastian Andrzej Siewior
On 2016-10-19 10:59:33 [-0700], Davidlohr Bueso wrote: > Sebastian noted that overhead for worker thread ops (throughput) > accounting was producing 'perf' to appear in the profiles, consuming > a non-trivial (ie 13%) amount of CPU. This is due to cacheline > bouncing due to the increment of