Re: [PATCH RFC V2 2/2] kvm PLE handler: Choose better candidate fordirected yield

[Rik van Riel]

On 07/10/2012 03:31 PM, Raghavendra K T wrote:
> From: Raghavendra K T<raghavendra.kt@xxxxxxxxxxxxxxxxxx>
>
> Currently PLE handler can repeatedly do a directed yield to same vcpu
> that has recently done PL exit. This can degrade the performance.
>
> Try to yield to most eligible guy instead by alternate yielding.
> Precisely, give chance to a VCPU which has:
>   (a) Not done PLE exit at all (probably he is preempted lock-holder)
>   (b) VCPU skipped in last iteration because it did PL exit, and probably
>   has become eligible now (next eligible lock holder)
>
> Signed-off-by: Raghavendra K T<raghavendra.kt@xxxxxxxxxxxxxxxxxx>

Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>

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