Message-ID: <4427CE4D.5010109@grupopie.com>
Date: Mon, 27 Mar 2006 12:36:45 +0100
From: Paulo Marques <pmarques@grupopie.com>
Organization: Grupo PIE
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To: Linda Walsh <lkml@tlinx.org>
CC: Adrian Bunk <bunk@stusta.de>, Jan Engelhardt <jengelh@linux01.gwdg.de>,
       Linux-Kernel <linux-kernel@vger.kernel.org>
Subject: Re: Save 320K on production machines?
References: <4426515B.5040307@tlinx.org> <Pine.LNX.4.61.0603261122410.22145@yvahk01.tjqt.qr> <20060326100639.GE4053@stusta.de> <4427BCCC.4080506@tlinx.org>
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Linda Walsh wrote:
> [...]
> The current makefile turns on the optimization only on gcc4 or higher,
> but my results were with gcc3.5.5.  Maybe defaults for 386 should
> enabler the optimization for some versions of gcc 3 as well?  -l

AFAICR, the problem with gcc3 and unit-at-a-time was stack usage with 
local variables on automatically inlined functions.

For instance, if function A called B and after B returned called C, both 
local variables of B and C would be given a reserved space on the stack 
during the execution of A if both functions were automatically inlined. 
So the space needed now was A+B+C whereas before was Max(A+B, A+C).

-- 
Paulo Marques - www.grupopie.com

Pointy-Haired Boss: I don't see anything that could stand in our way.
            Dilbert: Sanity? Reality? The laws of physics?
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