Terrible disk I/O performance for VMWare guest on dual-core Opterons
I've just switched from an MSI K8 MASTER2-FAR with dual Opteron 240s to
a Tyan S2877 with dual dual-core Opteron 265s. I'm running VMWare
Workstation 5.5.4 under FC6 and since the mobo/processor switch all the
guest OSes get terrible performance accessing the hosts disks.
I'm using Samba on the FC6 host OS for a WinXP guest which mostly just
gives up after many seconds trying to read disk files. I've found lots
of postings on the net about time synchronisation problems using
dual-core Opterons caused by the TSCs not being synched between the
processors, and I've tried restricting the guests to just a single core
- but to no avail. I have not found any answers posted anywhere.
Has anyone encountered this problem? If so, does anyone know of a
solution?
I'll be very grateful for any help or ideas
Dick
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Dick Holland
work: dholland(a)latentzero.com
home: dick(a)xegetix.com (PGP Key ID: 0xE362C267)
Skype: dick_at_home
http://www.linkedin.com/in/dickholland
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