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SubjectRe: [RFC v1] Tunable sched_mc_power_savings=n
KOSAKI Motohiro wrote:
> Hi
>>* Enterprise workloads on large hardware configurations may need
>> aggressive consolidation strategy
>>* Performance impact on server is different from desktop or laptops.
>> Interactivity is less of a concern on large enterprise servers while
>> workload response times and performance per watt is more significant
>>* Aggressive power savings even with marginal performance penalty is
>> is a useful tunable for servers since it may provide good
>> performance-per-watt at low utilisation
>>* This tunable can influence other parts of scheduler like wakeup
>> biasing for overall task consolidation
> I'd like to know how many saving power.
> if there are only small saving, I think this is not interesting feature.
> Do you expect how many percentage saving?

An experiment using DVFS on Xeon yeilded a 15-watt allowable reduction
even under running a considerable TPC-W workload. Lesser loads allowed
a 40-watt (out of 160) reduction.

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