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Date: Sat, 12 Jan 2002 01:34:14 +0100
From: Kurt Garloff <garloff@suse.de>
To: "M. Edward (Ed) Borasky" <znmeb@aracnet.com>
Cc: Daniel Phillips <phillips@bonn-fries.net>, Dan Kegel <dank@kegel.com>,
        "Timothy D. Witham" <wookie@osdl.org>,
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        Mike Galbraith <mikeg@wen-online.de>,
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        stp@osdl.org
Subject: [OT] Re: Regression testing of 2.4.x before release?
Message-ID: <20020112013414.B23020@garloff.etpnet.phys.tue.nl>
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Hi,

On Fri, Jan 11, 2002 at 04:04:59PM -0800, M. Edward (Ed) Borasky wrote:
> One particular application for which gcc 3.x *and* gcc 2.96.x are
> seriously deficient, at least on Intel/AMD 32-bit systems, is the
> high-performance linear algebra library Atlas. As a result, *my* default
> for compiling numerical applications is the Atlas-recommended one,
> 2.95.3. For the kernel, I use whatever the Red Hat 7.2 default is.

One of the problems of gcc-3 is taking decisions when to inline and when
not. This can hurt numerical code a lot, especially C++.
You may want to use -finline-limit-XXX to tune.
http://www.garloff.de/kurt/freesoft/gcc/
v1 of my patch went into 3.0.3, some version (don't know which) into
mainline, so 3.0.3 should do better.

Regards,
--=20
Kurt Garloff  <garloff@suse.de>                          Eindhoven, NL
GPG key: See mail header, key servers         Linux kernel development
SuSE GmbH, Nuernberg, DE                                SCSI, Security

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