On Mar 4, 2007, at 3:25 PM, Jeff Genender wrote:
Matt Hogstrom wrote:
Right now I'm running SuSE Open Linux 10.2 with the Xen kernel. I've
created a VM with 3G of memory and 2 CPUs (I don't currently have
Intel
hyperthreading enabled).
The performance of the VM is a bit sluggish. I had made some
assumptions on the performance based on the box's characteristics (4
3.4Ghz dual core processors with 16MB shared L3 cache). It has
20GB of
PC3200 memory. I think those assumptions may not be valid so I'm
going
to step backand get a baseline of native performance and then
layer in
the Xen Kernel and finally some VMs. I was hoping to avoid these
steps
cause they take time.
Look in to tuning the kernel and Xen, and th eprocessor.
Looking at that now. Thanks
I have seen
virtualization, when tuned, to nearly see almost no performance
difference. Also be sure you boot into the bios and turn on the VT
processor extensions. A larges % of the machines get shipped with
those
turned off in the bios (I don't know why they keep em off initially).
First thing I did :) I also disable hyperthreading for now as I'm
thinking that Xen most likely doesn't differentiate between a
hyperthreaded processor and a fully core.
Jeff
