Messages in this thread | | | Subject | Re: [RFC PATCH v3 3/5] sched: nominate preferred wakeup cpu | From | Peter Zijlstra <> | Date | Tue, 11 Nov 2008 14:43:39 +0100 |
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On Tue, 2008-11-11 at 00:03 +0530, Vaidyanathan Srinivasan wrote: > When the system utilisation is low and more cpus are idle, > then the process waking up from sleep should prefer to > wakeup an idle cpu from semi-idle cpu package (multi core > package) rather than a completely idle cpu package which > would waste power. > > Use the sched_mc balance logic in find_busiest_group() to > nominate a preferred wakeup cpu. > > This info can be sored in appropriate sched_domain, but > updating this info in all copies of sched_domain is not > practical. For now lets try with a per-cpu variable > pointing to a common storage in partition sched domain > attribute. Global variable may not work in partitioned > sched domain case.
Would it make sense to place the preferred_wakeup_cpu stuff in the root_domain structure we already have?
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