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From: "Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>
To: <cygwin-patches AT cygwin DOT com>, <cygwin AT cygwin DOT com>
References: <20010627023524 DOT S19058 AT redhat DOT com> <00aa01c0ff1b$44106960$a300a8c0 AT nhv> <20010627112321 DOT A21615 AT redhat DOT com>
Subject: Re: Deadly embrace between pthread_cond_wait and pthread_cond_signal
Date: Thu, 28 Jun 2001 09:00:13 +1000
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----- Original Message -----
From: "Christopher Faylor" <cgf AT redhat DOT com>
> >>I bet it would improve even more if we replaced the VirtualQuery
> >>in path.cc, too.
> >
> >With Rob's new patch that does this,
> >there actually isn't very much difference
> >
> >real    7m10.729s
> >user    2m50.963s
> >sys     1m11.721s
> >
> >Thanks !
>
> Huh.  I wonder why it makes such a big difference for pthreads.
>

Volume of calls :}. openening files doesn't occur quite as often as (say)
locking a mutex.

I'd like to publicly thank Greg Smith for his excellent profiling work in
identifying the bottleneck here. I know how time consuming that can be :}.

Thanks Greg!

Rob


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