On 12/14/10 08:29, Anthony Liguori wrote: >> I recently used to investigate the performance benefit. In a Linux >> guest, I was running a program that calls gettimeofday() 'n' times >> in a loop (the PM Timer register is read during each call). With >> in-kernel PM Timer, I observed a significant reduction of program >> execution time. >> > > I've played with this in the past. Can you post real numbers, > preferably, with a real work load? 2 years ago I posted relative comparisons of the time sources for older RHEL guests: http://www.mail-archive.com/kvm@xxxxxxxxxxxxxxx/msg07231.html What's the relative speed of the in-kernel pmtimer compared to the PIT? David -- 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
