On Thu, Jun 20, 2002 at 02:34:21PM +0100, David Brownlee wrote:
> 
>  When changing the default it will be important to ensure we do
>  not impair the binaries performance on other (non supersparc)
>  sparc systems. +10% on a supersparc is probably worth -1% on a
>  sun4c, but not -10% :)

actually, i wasn't recommending the changing of the default setup, i was
thinking more along the lines of a list of optimizations per platform.  in
my case at the very least, i don't mind rebuilding everything, since i usually
end up doing it anyway, so i just want to be able to pop the correct
optimization flags in where apropriate.

however, i do see the benefit of pre-built optimized systems for install and
forget setups.  so we should find the nice happy medium for the default install
and then maybe offer optimized builds.  which i would be more than happy to do
once i get things setup here.

>  Possible (quite ambitious) suggestion:
>      - Build -current system with and without -mtune=supersparc,
>        including kernel & boot blocks.
>      - Compare disk usage (Not important, just interesting number :)
>      - Setup a script to perform some benchmarks - ssh -1, ssh -2,
>        maybe something interesting from pkgsrc/benchmarks.
>      - Compile static version of the test binaries and repeat test
>        to confirm they show the same behaviour as dynamic.
>      - Put up test binaries and benchmark script for people with
>        other sparc models to test and report.

if no-one else does this, i will start doing it after i get my two new mail
server boxes so i can retire my old mail server to the duty of performance
testing for port-sparc.

-brian
-- 
"I mean Twinkies are good but getting shot really hurts."
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