> Andrea's kernels have keventd running SCHED_RR, and that's appropriate
> to this application also. Not sure about AIO though.
actually, the default (non-RT) priority of kwaitd is a feature. If there's
lots of exit() activity with lots or running threads (which is the typical
case on an exit-all for threads) then the kwaitd work will nicely cluster
up due it *not* always having the highest priority. This makes the cost of
kwaitd equivalent to the cost of per-CPU lists, asymptotically.
Ingo
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