RE: [Xen-devel] Re: poor domU VBD performance.

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

 > > SATA works fine for me on 2.0-testing.
> > I get 50MB/s reading from a raw partition in both cases using: 
> >  time dd if=/dev/sda6 of=/dev/null bs=1024k count=1024
> 
> I've tried with a raw partition (the same that holds the LVM 
> volume) and got same results : 51 MB/s on Dom0 and 37 MB/s on DomU
> 
> I don't know if it is of importance, but I need to add
> ignorebiostables=1 in my boot parameters in order to make the 
> SATA work (kernel hang on drive detection without it). The 
> SATA controller is a VIA one.

It doesn't sound like Xen is too happy on your system, but its not clear how 
this would explain the performance difference between dom0 and domU.

When the IOAPIC patches are checked in it will be interesting to see whether 
this fixes it. Try the unstable tree in a week or so.

Best,
Ian

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel