[CentOS-virt] Fast clock under VMWare
gmane-2006-04-16 at jt-socal.com
Fri Feb 22 19:12:22 UTC 2008
Ray Van Dolson wrote:
> I think the typical fix for the clock-too-fast problem is to boot your
> guest OS with the clock=pit option and then use the VMware Tools time
> synchronization option.
FWIW, I do this and the click still runs slightly too fast. I put this
script in my cron.hourly folder and run the VMWare Tools Time Sync to
fix any resulting slowness.
date --set='-1 second' >/dev/null 2>&1
I do no think the VMWare Tools handles "clock to fast" only "clock too
slow". There must be a better way, but I do not know it.
> If the clock is running too slow is where you want to look into using
> one of the 100Hz kernels.
I have found that the benefit of the VM kernel (aka 100Hz kernels) is
that the load on the physical host is substantially reduced. I did not
notice any timing issues/changes from this kernel.
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