Re: [Xen-devel] [PATCH v2] Xen: Spread boot time page scrubbing across all available CPU's

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 30.09.13 at 15:56, Malcolm Crossley <malcolm.crossley@xxxxxxxxxx> wrote:
> The difference between 1 core per node bandwidth and 3 core's per node 
> bandwidth is:
> 
> AMD: 30000MB/s (1-core) vs 48000MB/s (3-core)
> Intel: 12000MB/s (1-core) vs 38000MB/s (3-core)
> 
> So I think it's worth the extra complexity to have multiple core's per 
> node scrubbing memory.

The numbers are convincing. Which means that the only request
I'd have is to avoid more than one hyperthread on a core to get
picked for doing the scrubbing.

Jan


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