Hello, Chris. On Sun, Mar 20, 2011 at 08:10:51PM -0400, Chris Mason wrote: > I went through a number of benchmarks with the explicit > blocking/spinning code and back then it was still significantly faster > than the adaptive spin. But, it is definitely worth doing these again, > how many dbench procs did you use?
It was dbench 50. > The biggest benefit to explicit spinning is that mutex_lock starts with > might_sleep(), so we skip the cond_resched(). Do you have voluntary > preempt on? Ah, right, I of course forgot to actually attach the .config. I had CONFIG_PREEMPT, not CONFIG_PREEMPT_VOLUNTARY. I'll re-run with VOLUNTARY and see how its behavior changes. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
