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[Xen-devel] Direct I/O to domU seeing a 30% performance hit
| To: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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| Subject: | [Xen-devel] Direct I/O to domU seeing a 30% performance hit |
| From: | John Byrne <jbyrne@xxxxxxxxxxxxxxxxxxxxxx> |
| Date: | Mon, 06 Nov 2006 21:55:17 -0800 |
| Delivery-date: | Tue, 07 Nov 2006 02:31:33 -0800 |
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I was asked to test direct I/O to a PV domU. Since, I had a system with two NICs, I gave one to a domU and one dom0. (Each is running the same kernel: xen 3.0.3 x86_64.) I'm running netperf from an outside system to the domU and dom0 and I am seeing 30% less throughput for the domU vs dom0. Is this to be expected? If so, why? If not, does anyone have a guess as to what I might be doing wrong or what the issue might be? Thanks, John Byrne _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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