Messages in this thread | | | Date | Tue, 29 Aug 2017 14:46:55 +0200 | From | Peter Zijlstra <> | Subject | Re: [RFC PATCH v2 7/7] sched/idle: update poll time when wakeup from idle |
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On Tue, Aug 29, 2017 at 11:46:41AM +0000, Yang Zhang wrote: > In ttwu_do_wakeup, it will update avg_idle when wakeup from idle. Here > we just reuse this logic to update the poll time. It may be a little > late to update the poll in ttwu_do_wakeup, but the test result shows no > obvious performance gap compare with updating poll in irq handler. > > one problem is that idle_stamp only used when using CFS scheduler. But > it is ok since it is the default policy for scheduler and only consider > it should enough. > > Signed-off-by: Yang Zhang <yang.zhang.wz@gmail.com> > Signed-off-by: Quan Xu <quan.xu0@gmail.com>
Same broken SoB chain, and not a useful word on why you need to adjust this crap to begin with. What you want that poll duration to be related to is the cost of a VMEXIT/VMENTER cycle, not however long we happened to be idle.
So no.
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