On Sun, Jun 23, 2002 at 02:46:50PM -0400, Brian Hechinger wrote:
> 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.

An important thing to remember is that SPARCs which benefit hugely from
v8 instructions are probably in the vast majority.

Also, isn't it true that NetBSD-sparc will still run the v8 instructions
on v7 CPUs through emulation?

> 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.

I offer time and a spare and unloaded SS5/170 or SS5/110 for testing.


-- 
UNIX/Perl/C/Pizza__________________________________shannon@widomaker.com