Messages in this thread | | | Date | Tue, 30 Sep 2014 17:58:21 -0400 | From | Rik van Riel <> | Subject | Re: [PATCH v2 2/2] sched/fair: leverage the idle state info when choosing the "idlest" cpu |
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On 09/04/2014 11:32 AM, Nicolas Pitre wrote: > The code in find_idlest_cpu() looks for the CPU with the smallest > load. However, if multiple CPUs are idle, the first idle CPU is > selected irrespective of the depth of its idle state. > > Among the idle CPUs we should pick the one with with the shallowest > idle state, or the latest to have gone idle if all idle CPUs are in > the same state. The later applies even when cpuidle is configured > out. > > This patch doesn't cover the following issues:
The main thing it does not cover is already running tasks that get woken up again, since select_idle_sibling() covers everything except for newly forked and newly executed tasks.
I am looking at adding similar logic to select_idle_sibling()
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