On Thu, 04 Jun 2009 22:32:00 +0100, Daniel P. Berrange wrote: > Great, this confirms my thought. We asked for a 99 ms timeout, but poll > returned significantly sooner than we asked for - approx 60-80 ms. So > when we then ncompare the elapsed time, with scheduled timer, we don't > see the expiry. > > I suspect that Mandriva is either using a lower HZ for the kernel, or do > not have the hi-res timers or tickless feature. That's correct, Mandriva's server kernel is using 100 hz: $ uname -a Linux n4.mandriva.com 2.6.22.12-server-1mdv #1 SMP Tue Nov 20 09:35:09 EST 2007 i686 Intel(R) Xeon(TM) CPU 2.80GHz GNU/Linux $ zgrep HZ /proc/config.gz CONFIG_NO_HZ=y CONFIG_HZ_100=y # CONFIG_HZ_250 is not set # CONFIG_HZ_300 is not set # CONFIG_HZ_1000 is not set CONFIG_HZ=100 CONFIG_MACHZ_WDT=m -- Frederik Himpe -- Libvir-list mailing list Libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list