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RE: [Xen-devel] Power aware credit scheduler

>From: Keir Fraser [mailto:keir.fraser@xxxxxxxxxxxxx] 
>Sent: 2008年6月19日 16:10
>On 19/6/08 09:03, "Tian, Kevin" <kevin.tian@xxxxxxxxx> wrote:
>>> Does it then make sense to have the scheduler react to
>>> governor? Sounds like it could be a weird feedback loop.
>> Good suggestion. We're considering adding some more inputs from
>> key components into on-demand governor, instead of simply polling
>> busy ratio for freq change in a fixed interval. For example, when one
>> cpu pulls vcpu from other runqueues, it's the indicator that 
>its current
>> freq may not fit and it's better to scale to max immediately instead
>> of waiting for next 20ms check timer. Other indicators like 
>> event, etc. You kick a good instance. :-)
>I see. This specific example doesn't sound unreasonable. I suppose
>experimental data will show what works and what doesn't.

Yes, and we'll start some experiment soon. Will let you know once we
get some concrete data.


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