| To: | <xen-users@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-users] network performance under Xen 3.3 |
| From: | "James Harper" <james.harper@xxxxxxxxxxxxxxxx> |
| Date: | 2008年12月26日 23:32:01 +1100 |
| Delivery-date: | 2008年12月26日 04:32:53 -0800 |
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| Thread-index: | AclnVfPXsEZue5+qQdGci6ljV3nrrw== |
| Thread-topic: | network performance under Xen 3.3 |
With my GPLPV drivers I was able to get a tx performance from HVM DomU -> Dom0 of around 1-2GBits/second. That was under Xen 3.2.1 (Debian packages). Since upgrading to Xen 3.3.0, and the latest hg as of a few weeks ago, I can't get more than 250-300MBits/second. Has anyone else using the GPLPV drivers observed this? A tcpdump in Dom0 during an iperf test shows packets received from DomU starting out at 1500 bytes, going up to about 40 kbytes (tcp large send offload), then dropping to about 8 kbytes and staying there for the remainder of the test. No packets are dropped, so I'm a bit puzzled as to why this would happen. Given that Windows is doing the sending, I assume it must be Windows making the decision on the packet size, but I don't understand why it would be different between xen versions... James _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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