Message 331794 - Python tracker

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Author	vstinner
Recipients	vstinner
Date	2018-12-14.11:06:45
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1544785605.97.0.788709270274.issue35479@psf.upfronthosting.co.za>
In-reply-to

Content
My PR 11136 doesn't work: _maintain_pool() should be called frequently to check when a worker completed. Polling worker exit status seems inefficient :-( asyncio uses SIGCHLD signal to be notified when a child process completes. SafeChildWatcher calls os.waitpid(pid, os.WNOHANG) on each child process, whereas FastChildWatcher() uses os.waitpid(-1, os.WNOHANG).

My PR 11136 doesn't work: _maintain_pool() should be called frequently to check when a worker completed. Polling worker exit status seems inefficient :-(

asyncio uses SIGCHLD signal to be notified when a child process completes. SafeChildWatcher calls os.waitpid(pid, os.WNOHANG) on each child process, whereas FastChildWatcher() uses os.waitpid(-1, os.WNOHANG).

History
Date	User	Action	Args
2018-12-14 11:06:46	vstinner	set	recipients: + vstinner
2018-12-14 11:06:45	vstinner	set	messageid: <1544785605.97.0.788709270274.issue35479@psf.upfronthosting.co.za>
2018-12-14 11:06:45	vstinner	link	issue35479 messages
2018-12-14 11:06:45	vstinner	create