Keep affinity of threadpool threads the same as the main thread on entry

Keep affinity of threadpool threads the same as the main thread on entry, regardless of later changes to the main thread. This makes sure that we don't pin the threadpool threads to one CPU when the engine_pin() function is in effect.

Fixes #846 (closed)

added architecture bug enhancement performance labels

requested review from @matthieu

assigned to @pdraper

mentioned in issue #846 (closed)

added 1 commit

• 6161c7d3 - Remove junk.

Compare with previous version

This should only affect the threadpool used to do the i/o copies at the start, right? Everything else ought to be unchanged.

Yes.

Better than what we have now as it avoids anyone needing to work this out once more and makes it clear what the pinning of the threadpool is expected to be. I guess one could also imagine generalizing work to have actually theadpool pinning, since it is clear where to start.

Tested and approved. Seems to indeed make the difference mentioned in #846 (closed).

merged

mentioned in commit aeebfb85