Re: [Xen-devel] [PATCHv3 6/6] evtchn: pad struct evtchn to 64 bytes

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 17.06.15 at 14:03, <david.vrabel@xxxxxxxxxx> wrote:
> The number of struct evtchn in a page must be a power of two.  Under
> some workloads performance is improved slightly by padding struct
> evtchn to 64 bytes (a typical cache line size), thus putting the fewer
> per-channel locks into each cache line.
> 
> This does not decrease the number of struct evtchn's per-page.
> 
> Signed-off-by: David Vrabel <david.vrabel@xxxxxxxxxx>

Acked-by: Jan Beulich <jbeulich@xxxxxxxx>


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