Re: [PATCH RFC 1/2] kvm: Handle undercommitted guest case in PLE handler

From: Nikunj A Dadhania
Date: Thu Oct 11 2012 - 06:40:27 EST


On Wed, 10 Oct 2012 09:24:55 -0500, Andrew Theurer <habanero@xxxxxxxxxxxxxxxxxx> wrote:
>
> Below is again 8 x 20-way VMs, but this time I tried out Nikunj's gang
> scheduling patches. While I am not recommending gang scheduling, I
> think it's a good data point. The performance is 3.88x the PLE result.
>
> https://docs.google.com/open?id=0B6tfUNlZ-14wWXdscWcwNTVEY3M

That looks pretty good and serves the purpose. And the result says it all.

> Note that the task switching intervals of 4ms are quite obvious again,
> and this time all vCPUs from same VM run at the same time. It
> represents the best possible outcome.
>
>
> Anyway, I thought the bitmaps might help better visualize what's going
> on.
>
> -Andrew
>

Regards
Nikunj

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