On 01/12/16 14:21, Michael S. Tsirkin wrote: > > OK so I'll have to tweak the test to put something > on stack to measure the difference: my test tweaks a > global variable instead. > I'll try that by tomorrow. > > I couldn't measure any difference between mfence and lock+addl > except in a micro-benchmark, but hey since we are tweaking this, > let's do the optimal thing. > Be careful with this: if it only shows up in a microbenchmark, we may introduce a hard-to-debug regression for no real benefit. -hpa _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
