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Re: [Xen-devel] [PATCH] Network Checksum Removal

On Monday 23 May 2005 03:38 pm, Keir Fraser wrote:
> On 23 May 2005, at 21:22, Ian Pratt wrote:
> >> Maybe I'm being pessimistic though: Can you reproduce the
> >> rather more impressive speedups that you previously saw, Jon?
> >
> > We should be getting some benefit on the receive path, where the
> > checksum is normally forced to happen independent of a copy. Having
> > this
> > offloaded to hardware should produce some measureable gain.
> Ah, I forgot about that. But rx csum was not being toggled in the
> experiment.
> The external bandwidth was definitely very low, so I guess there must
> be some other bottleneck in Bin's setup.

I was using 256MB/domain in my test system (and Bin is using 128MB).  That 
might be the bottleneck.


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