Re: [Xen-devel] [PATCH 0/4] Implement persistent grant in xen-netfront/netback

[annie li <annie.li@xxxxxxxxxx>]

On 2012-11-16 19:46, Ian Campbell wrote:
> It seems like having netfront simply allocate itself a pool of grant
> references which it reuses would give equivalent benefits whilst being a
> smaller patch, with no protocol change and avoiding double copying. In
> fact by avoiding the double copy I'd expect it to be even better.
>
>   
OK, I can try this implementation.
And I'd better to compare the performance between double copy and this 
implementation to see how much grant lock affects grant copy too.
> I think you need to measure both dom0->domU and domU->dom0 to get the
> full picture since AIUI netperf sends the bulk data in only one
> direction with just ACKs coming back the other way.
>   
Yes.
My environment does not meet requirement of more VMs, I would do more 
thorough test after Konrad setups the environment.
Thanks
Annie

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