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

[Jon Mason <jdmason@xxxxxxxxxx>]

On Monday 23 May 2005 05:05 pm, Bin Ren wrote:
> On 5/23/05, Jon Mason <jdmason@xxxxxxxxxx> wrote:
> > I get the following domU->dom0 throughput on my system (using netperf3
> > TCP_STREAM testcase):
> > tx on   ~1580Mbps
> > tx off  ~1230Mbps
> >
> > with my previous patch (on Friday's build), I was seeing the following:
> > with patch      ~1610Mbps
> > no patch                ~1100Mbps
>
> I suppose you are running dom0 and dom1 on different CPUs. Is it

Yes, I am.

> possible for you to pin them to the same CPU and get the numbers
> again? It'll show how much overhead context switches and CPU share
> halved could incur.

I pinned them to the same CPU and got the following:
tx on   ~1480Mbps
tx off  ~1330Mbps

> > The slight difference between the two might be caused by the changes that
> > were incorporated in xen between those dates.  If you think it is worth
> > the time, I can back port the latest patch to Friday's build to see if
> > that makes a difference.
> >
> > Thanks,
> > Jon
> >
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel

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