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Re: [Xen-devel] VCPU migration overhead conpensation ?

(BTW, please don't top-post on xen-devel: respond in-line to the thing you want to respond to.)

On 10/04/13 06:44, Sisu Xi wrote:
Hi, Dario:

Thanks for your reply and tips for sending emails!  :)

I am also performing some overhead measurement for the scheduler. If a VCPU is migrated from one core to another, the overhead is around 2 microseconds on my machine, which is much less than what is set in Credit2 (50 microseconds).

When you say "overhead", I assume you mean that's how long the whole migration takes?

The point of the compensation isn't so much for the actual migration itself, but for the lower performance the vcpu will get after the migration due to having cold caches.


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