Re: buildworld fails

From: Ilker OZUPAK <ilker.ozupak_at_emu.edu.tr>
Date: Mon, 12 Jul 2004 12:49:12 +0300
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hello,

I had started a new build just before sending mail. (which is going on)
it just get past the problem point. thanks for the reminder.

for the -Os case...

which benchmarks could be usefull. could anyone make a few
suggestions?

mysql test suite  is the first one that comes to my mind.
anything else? 

On Monday 12 July 2004 12:13, you wrote:
> On 07/12/04 03:57, Ilker OZUPAK wrote:
> > when i try to buildworld using "CPUTYPE=p4" i get errors in
> > lib/libc/gen/getnetgrant.c. i got the same error in both
> > -march=pentium4 and mcpu=pentium4 cases
>
> <snip>
>
> > CFLAGS= -O3 -pipe -mcpu=pentium4
>
> Um... have you tried not using -O3?  As far as I know, -O2 and below
> should work.
>
> I use the following:
> CPUTYPE= p4
> CFLAGS= -Os -pipe
> COPTFLAGS= -Os -pipe
>
> Although it is slightly broken (don't use it with
> (xfree86|xorg)-libraries, for example), I find -Os gives the best
> performance on my p4.  In case you haven't heard of it, -Os includes all
> the optimizations from -O2 that don't increase code size and
> additionally optimizes for size.  I think the extra performance over -O2
> is due to better cache hit rates, but that's just idle speculation.
>
> Perhaps I don't know something everyone else knows, but I'm surprised
> more people don't benchmark -Os.
>
> Jon
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Received on Mon Jul 12 2004 - 07:48:32 UTC

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