From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Greg Stark <gsstark(at)mit(dot)edu> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: thread_test.c problems |
Date: | 2004-04-05 16:23:49 |
Message-ID: | 200404051623.i35GNnP01568@candle.pha.pa.us |
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Lists: | pgsql-general pgsql-hackers |
Greg Stark wrote:
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
>
> > wespvp(at)syntegra(dot)com wrote:
> > > On 4/4/04 11:43 PM, "Bruce Momjian" <pgman(at)candle(dot)pha(dot)pa(dot)us> wrote:
> > >
> > > > OK, new patch applied that causes all threads to wait until the parent
> > > > checks their thread-specific pointers. I ran 1000 tests and all passed.
> > > > Hopefully it will good for you too.
> > >
> > > I'll try to give it a test tonight.
> >
> > Please grab CVS. I added sched_yield() too.
>
> Make sure to test this on linux 2.6. They changed sched_yield() to not cause
> context switches in a lot of cases where it did previously. You might need a
> usleep() there instead or in addition.
Usleep is probably more unportable than sched_yield on platforms that
support threads. I actually don't need sched_yield to context switch,
only to allow the other threads to complete.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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