Subject: Re: ssh soo.......Slooooow
To: Charles Shannon Hendrix <shannon@widomaker.com>
From: David Brownlee <abs@netbsd.org>
List: port-sparc
Date: 06/20/2002 14:34:21
On Wed, 19 Jun 2002, Charles Shannon Hendrix wrote:
> > You may want to use 'ssh -1', or alternately rebuild using
> > -mcpu=supersparc <plug> /pkgsrc/devel/cpuflags </plug>
> >
> > What happened to the suggestion of defaulting the sparc compiler
> > to -mtune=supersparc - did anyone run timings?
>
> Where you the one who asked about this?
>
> The thread just kind of died.
>
> I volunteer an idle SS5 to run tests. Right now I don't what tests
> would be best, but I'll work on getting some benchmarks and run them
> for a few days.
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% :)
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.
--
David/absolute -- www.netbsd.org: No hype required --