On Tue, Jan 28, 2014 at 01:19:10PM -0500, Waiman Long wrote: > This patch introduces a new queue spinlock implementation that can > serve as an alternative to the default ticket spinlock. Compared with > the ticket spinlock, this queue spinlock should be almost as fair as > the ticket spinlock. It has about the same speed in single-thread and > it can be much faster in high contention situations. Only in light to > moderate contention where the average queue depth is around 1-2 will > this queue spinlock be potentially a bit slower due to the higher > slowpath overhead. But light to moderate contention should be the most common case. If your spinlock is very heavily contended, it should be broken up. I would really like more performance numbers for this on single and dual socket machines and 'normal' workloads (ha! as if those exist), ie. kbuild is all very important to us :-) -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
