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RE: [Xen-devel] poor domU VBD performance.
| To: | "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>, "Peter Bier" <peter_bier@xxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | RE: [Xen-devel] poor domU VBD performance. |
| From: | "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx> |
| Date: | Mon, 28 Mar 2005 19:55:18 +0100 |
| Delivery-date: | Mon, 28 Mar 2005 18:55:31 +0000 |
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| Thread-index: | AcUyMRCUO0LTebHDTTmv1k9G7adxUAAwkXQAADT143A= |
| Thread-topic: | [Xen-devel] poor domU VBD performance. |
> > I found out that dom0 does file-system IO and raw IO ( using > > dd as a tool to test > > throughput from the disk ) is about exactly the same as when > > using a standard > > linux kernel without XEN. But the raw IO from DomU to an > > unused disk ( a second > > disk in the system ) is limited to fourty percent of the > > speed I get within Dom0. OK, this looks like a perofrmance bug that's crept into the 2.6 dom0 some where along the way. I'm surprised no-one else has spotted it. Please can you confirm that performance is OK if you use 2.4 as a dom0? (It doesn't matter what you use as guests). Thanks, Ian _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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