On Wed, Jun 24, 2015 at 10:46:48AM +0200, Ingo Molnar wrote: > > > > flock02 > > > > mean variance sigma max > > > > min > > > > tip-1 11.8994 0.5874 0.7664 13.2022 > > > > 8.6324 > > > > tip-2 11.7394 0.5252 0.7247 13.2540 > > > > 9.7513 > > > > tip-3 11.8155 0.5288 0.7272 13.2700 > > > > 9.9480 > > > > tip+percpu-rswem-1 15.3601 0.8981 0.9477 16.8116 > > > > 12.6910 > > > > tip+percpu-rswem-2 15.2558 0.8442 0.9188 17.0199 > > > > 12.9586 > > > > tip+percpu-rswem-3 15.5297 0.6386 0.7991 17.4392 > > > > 12.7992
> [ Such high variance is often caused by (dynamically) unstable load balancing > and > the workload never finding a good equilibrium. Any observable locking > overhead > is usually just a second order concern or a symptom. Assuming the workload > context switches heavily. ] flock02 is a relatively stable benchmark -- unlike some of the others where the variance is orders of magnitude higher than the avg. But yes, I'll go poke at it more. I just need to hunt down unrelated fail before continuing with this. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
