Re: [Xen-devel] [BUNDLE] Xen Share w/ block device

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 17 Feb 2006, at 07:22, Rusty Russell wrote:

> > I don't doubt that better memory performance can be achieved by
> > adjusting event notification frequency/batching -- as you pointed out
> > earlier... but block devices are a pretty weird place to try to win.
> > I'd expect the numbers from the two tests you're running to be
> > identical -- and bottlenecked on the disk.  By a lot.
> Hmm, my dom0 only has 128MB of RAM, and my dom1 64MB.  Wonder if I'm
> getting bad behaviour due to small amounts of memory?
>
> I was just happy to get my code working, but I'll dig deeper next week.
Perhaps one backend is hitting the buffer cache and the other is 
bypassing it?
 -- Keir


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