Avi Kivity wrote: > Anthony Liguori wrote: >> Avi Kivity wrote: >>> Anthony Liguori wrote: >>>> It's pretty erratic. If I run if a few times at any rate, >>>> sometimes I get 0.0 and sometimes I get a more sane result. >>> >>> I expect the newer kernel is sometimes disqualifying the timestamp >>> counter from being used as a clocksource. Running pinned to a cpu >>> may improve things. >> >> Things get better if I disable the PM timer and if I pin to a single >> CPU. >> > > Can you post the magic command line for future reference?
I disabled CONFIG_X86_PM_TIMER in the kernel config and then used: sudo taskset 1 qemu -hda /dev/volumes/kvm-dev -m 2000 -vnc :3 -kernel /build/kvm/arch/i386/boot/bzImage -append "root=0301 ro" However, this doesn't appear to be a perfect solution. If I launch the VM redirecting everything to the serial port, I again start having problems with virtbench. I guess the shear rate of interrupts using the serial port throws off the accuracy of the clock? Regards, Anthony Liguori ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
