VMWare clock syncronization errors
Using VMWare on a quad-core Intel(R) Xeon(R) CPU E5335 @ 2.00GHz with Ubuntu in /var/log/syslog on the host i got a lot of messages:
rtc: lost some interrupts at 128Hz
rtc: lost some interrupts at 256Hz
[..]
/dev/vmmon[26777]: host clock rate change request 123 -> 146
rtc: lost some interrupts at 256Hz
[..]
/dev/vmmon[26777]: host clock rate change request 123 -> 146
After some googlesearches i found the solution. In both case i had to edit the /etc/vmware/config file.
For the rtc error (from http://www.vmware.com/pdf/vmware_timekeeping.pdf):
host.useFastClock = FALSE
And for the clock rate (from http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1591):
host.cpukHz = 1995001
host.noTSC = TRUE
ptsc.noTSC = TRUE
host.noTSC = TRUE
ptsc.noTSC = TRUE
To calculate the cpukHZ open /proc/cpuinfo:
~$ cat /proc/cpuinfo
[..]
cpu MHz : 1995.001
[..]
[..]
cpu MHz : 1995.001
[..]
The value is in MHz, so multiply by 1000… :)
Informatico Fiorentino appassionato di GNU/Linux e Sviluppo Web. Studio per diventare Ingegnere Informatico, suono una Gibson SG "Diavoletto" e cavalco una Hornet 600cc. 
