X-Spam-Check-By:	sourceware.org
Date:	Fri, 19 Jan 2007 18:27:40 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: 1.7.0 CVS mmap failure
Message-ID:	<20070119172740.GJ27843@calimero.vinschen.de>
Reply-To:	cygwin AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
References:	<Pine DOT CYG DOT 4 DOT 58 DOT 0701051237090 DOT 2880 AT PC1163-8460-XP DOT flightsafety DOT com> <20070105192302 DOT GD12776 AT calimero DOT vinschen DOT de> <20070110095345 DOT GL23638 AT calimero DOT vinschen DOT de> <Pine DOT CYG DOT 4 DOT 58 DOT 0701100903410 DOT 3236 AT PC1163-8460-XP DOT flightsafety DOT com> <Pine DOT CYG DOT 4 DOT 58 DOT 0701161717400 DOT 2732 AT PC1163-8460-XP DOT flightsafety DOT com> <20070117103959 DOT GA23172 AT calimero DOT vinschen DOT de> <Pine DOT CYG DOT 4 DOT 58 DOT 0701171237581 DOT 2732 AT PC1163-8460-XP DOT flightsafety DOT com> <20070118091400 DOT GC27843 AT calimero DOT vinschen DOT de> <20070118171852 DOT GA18119 AT calimero DOT vinschen DOT de> <20070119154125 DOT GD1586 AT ns1 DOT anodized DOT com>
Mime-Version:	1.0
In-Reply-To:	<20070119154125.GD1586@ns1.anodized.com>
User-Agent:	Mutt/1.4.2.2i
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Unsubscribe:	<mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com

On Jan 19 07:41, Christopher Layne wrote:
> Thanks for fixing this. I also noticed these when reading through the code.
> Another area for extremely small optimization is to just cache the pagesize.
> I notice a *lot* of calls to getpagesize(), when I can't really see the
> pagesize changing within a single call to mmap(). Since the map implementations

See the implementation of getpagesize.  It's only evaluated once, the
function is used as encapsulation.  I don't think you will see a really
noticable performance gain by storing the result in a local var.


Corinna

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

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/

- Raw text -