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Re: [Xen-devel] HVM dropped packets
| To: | Nathan Stratton <nathan@xxxxxxxxxxxx>, Pasi Kärkkäinen <pasik@xxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] HVM dropped packets |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Wed, 26 Aug 2009 08:53:45 +0100 |
| Cc: | Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Wed, 26 Aug 2009 00:54:18 -0700 |
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| Thread-topic: | [Xen-devel] HVM dropped packets |
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On 26/08/2009 08:45, "Nathan Stratton" <nathan@xxxxxxxxxxxx> wrote: >> I bet the drops are caused by the low performance of Qemu nic _emulation_. > > Does one emulate better then the rest? e1000 is probably faster than the rest due to a more efficient hardware interface better suited to emulation. You may still get receiver overruns though (which I think was the source of the drops you were seeing?). That's simply the host receiving packets faster than they can get stuffed through the emulated interface. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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