On Fri, Jan 08, 2021 at 04:10:51PM +0100, Vincent Guittot wrote: > Another thing that worries me, is that we use the avg_idle of the > local cpu, which is obviously not idle otherwise it would have been > selected, to decide how much time we should spend on looking for > another idle CPU. I'm not sure that's the right metrics to use > especially with a possibly stalled value.
The thinking was that if this CPU has little idle time, this CPU should not spend a lot of time searching... That is; if we spend more time looking for places to run, than we have idle time, we're loosing cycles we could've ran (supposedly useful) work. The only counter argument is tail latency.
