On 06/08/2012 07:06 PM, Dan Magenheimer wrote: >> From: Avi Kivity [mailto:avi@xxxxxxxxxx] >> <this comment was on Sasha's first round of benchmarking> >> These results give about 47 usec per page system time (seems quite >> high), whereas the difference is 0.7 user per page (seems quite low, for >> 1 or 2 syscalls per page). Can you post a snapshot of kvm_stat while >> this is running? > > Note that the userspace difference is likely all noise. > No tmem/zcache activites should be done in userspace. All > the activites result from either a page fault or kswapd. s/user/usec/... > Since each streamed page (assuming no WasActive patch) should > result in one hypercall and one lz01x page compression, I suspect > that 47usec is a good estimate of the sum of those on Sasha's machine. It's a huge number for a page. The newer results give lower numbers, but still quite high. -- error compiling committee.c: too many arguments to function -- 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
