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Date:	Thu, 13 Mar 2008 10:30:28 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: pthread_mutex_lock/unlock performance?
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On Mar 13 10:32, Mojmir Svoboda wrote:
> hello,
> 
> i'm runing cygwin (1.5.25?) under win xp sp2 and i ran a simple test
> which was supposed to measure the speed of pthread_mutex_lock,
> increment, pthread_mutex_unlock compared to interlocked increment and
> windows critical section.
> 
> the thing is that cygwin's pthread_mutex_lock performs quite lazily - it
> takes about seven times more than using native critical section.
> 
> i wonder why, of course :)

Bookkeeping overhead?  Just have a look into the Cygwin source.  If you
want to speed up Cygwin's pthread implementation, feel free to
contribute:  http://cygwin.com/contrib.html


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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