Re: [RFC PATCH v8 00/16] Provide a zero-copy method on KVMvirtio-net.

[Shirley Ma]

Hello Avi,

On Mon, 2010-08-02 at 19:32 +0300, Avi Kivity wrote:
> When are you seeing gup_fast() fall back to gup()?  It should be at
> most 
> once per page (when a guest starts up none of its pages are mapped,
> it 
> faults them in on demand). 

netperf/netserver latency results are pretty good for message size
between 1 bytes and 512 bytes when I have 64 bytes small copy.

However if I don't have any small copy , the ping RTT time is
unreasonable huge. Since we think it's better to have small message with
copy, so there will be no issue.

Thanks
Shirley

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