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SubjectRe: [RFC] observe and act upon workload parallelism: PERF_TYPE_PARALLELISM (Was: [RFC][PATCH] sched_wait_block: wait for blocked threads)
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> This would be a perfect and suitable use of poll() concepts i think -
> and well-optimized one as well. It could even be plugged into epoll().
>
>        Ingo

Sorry for not replying earlier, but I was knocked out on the couch
(and still am). I'll have a more thorough look later on when my head
stops spinning 'round and 'round.

I must say that even without applying this perf_event to userspace
scheduling, it's probably a nice event to have anyway in order
to measure concurrency in existing applications. That it would
be suitable to actually control parallellism is probably just a nice
extra. But let's look at things again when the clouds have left
the brain ;)

Stijn
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