Friday, May 09, 2008

Compressed Time

I've been having trouble with VMWare guests losing clock ticks to the extent that the guest OS clock runs approximately half-speed compared to the host. This is with an Ubuntu Server host OS and a Debian Etch guest OS. I found that adding these settings to /etc/vmware/config:

tools.timeSync = "TRUE"
host.useFastClock = "FALSE"
monitor_control.virtual_rdtsc = "FALSE"

Fixed the timing issues as well as the boundless supply of timing errors showing up on the host in /var/log/messages:

rtc: lost some interrupts at 512Hz.

Thanks to the following for inspiration:

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