Re: [Xen-devel] [PATCH v5] xen: rtds: only tickle non-already tickled CPUs

[George Dunlap <george.dunlap@xxxxxxxxxx>]

On 08/03/2017 03:13 AM, Meng Xu wrote:
> When more than one idle VCPUs that have the same PCPU as their
> previous running core invoke runq_tickle(), they will tickle the same
> PCPU. The tickled PCPU will only pick at most one VCPU, i.e., the
> highest-priority one, to execute. The other VCPUs will not be
> scheduled for a period, even when there is an idle core, making these
> VCPUs unnecessarily starve for one period.
> 
> Therefore, always make sure that we only tickle PCPUs that have not
> been tickled already.
> 
> Signed-off-by: Haoran Li <naroahlee@xxxxxxxxx>
> Signed-off-by: Meng Xu <mengxu@xxxxxxxxxxxxx>
> Reviewed-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx>

Committed.

 -George

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