Re: [Xen-devel] credit based scheduler

["Molle Bestefich" <molle.bestefich@xxxxxxxxx>]

Emmanuel Ackaouy wrote:
> The credit scheduler is an SMP CPU scheduler. It is designed such
> that no physical CPU will ever idle if there is a waiting
> runnable VCPU on the host. We call this being work conserving.
> 3 active UP guests on a 2CPU host each get 33% of the total CPU
> available; The credit scheduler takes care of migrating guest
> VCPUs across physical CPUs to achieve this transparently.
Migrating 1 VCPU across 2 CPUs, or swapping all 3 VCPUs around in a
ring-fashion?

Sounds like this algorithm is an evil killer of CPU cache performance to me :-).

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