From: ludo@gnu.org (Ludovic Courtès)
To: Mark H Weaver <mhw@netris.org>
Cc: guile-devel@gnu.org
Subject: Re: [PATCH] Futures: Avoid creating the worker pool more than once
Date: Sat, 10 Nov 2012 14:53:48 +0100 [thread overview]
Message-ID: <87y5i936oj.fsf@gnu.org> (raw)
In-Reply-To: <87ehk2rvyp.fsf@tines.lan> (Mark H. Weaver's message of "Fri, 09 Nov 2012 22:13:50 -0500")
Mark H Weaver <mhw@netris.org> skribis:
> ludo@gnu.org (Ludovic Courtès) writes:
>
>> Mark H Weaver <mhw@netris.org> skribis:
>>
>>> + ;; setting 'create-workers!' to a no-op is an optimization, but it is
>>> + ;; still possible for '%create-workers!' to be called more than once
>>> + ;; from different threads. Therefore, to avoid creating %workers more
>>> + ;; than once (and thus creating too many threads), we check to make
>>> + ;; sure %workers is empty within the critical section.
>>
>> Do you have a scenario where this happens?
>
> I'd hoped that the comment above was clear, but let me try again.
Yes, what wasn’t clear to me is how practical this is, and whether
somebody encountered that situation in real life.
Anyway, please apply.
Thanks,
Ludo’.
prev parent reply other threads:[~2012-11-10 13:53 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-06 23:07 [PATCH] Futures: Avoid creating the worker pool more than once Mark H Weaver
2012-11-07 13:46 ` Mark H Weaver
2012-11-07 14:14 ` Daniel Hartwig
2012-11-16 23:15 ` Ludovic Courtès
2012-11-30 19:01 ` Mark H Weaver
2012-11-30 20:14 ` Ludovic Courtès
2012-11-08 19:11 ` Ludovic Courtès
2012-11-10 3:13 ` Mark H Weaver
2012-11-10 13:53 ` Ludovic Courtès [this message]
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