On 09/02/2013 01:50 PM, Michael S. Tsirkin wrote: > On Fri, Aug 30, 2013 at 12:29:18PM +0800, Jason Wang wrote: >> > We tend to batch the used adding and signaling in vhost_zerocopy_callback() >> > which may result more than 100 used buffers to be updated in >> > vhost_zerocopy_signal_used() in some cases. So wwitch to use > switch Ok. >> > vhost_add_used_and_signal_n() to avoid multiple calls to >> > vhost_add_used_and_signal(). Which means much more less times of used index >> > updating and memory barriers. > pls put info on perf gain in commit log too > Sure. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
