[kde-solaris] Re: fibonacci
Sunil
funtoos at yahoo.com
Sat Nov 6 05:07:05 CET 2004
that's bizzare!! a performance regression in 3.4.2?
--- Stefan Teleman <steleman at nyc.rr.com> wrote:
>
[steleman at obiwan][~/programming/fibonacci][11/05/2004
> 22:01:54][196]>>
> /usr/local/bin/gcc -m32 -mtune=v9 -O3 fibonacci.c -o
>
> fibonacci.gcc342.v9
>
[steleman at obiwan][~/programming/fibonacci][11/05/2004
> 22:04:28][197]>>
> ./fibonacci.gcc342.v9 36
> ./fibonacci.gcc342.v9: calculated 10 fibonacci(36)
> in 19.000000
> seconds
>
[steleman at obiwan][~/programming/fibonacci][11/05/2004
> 22:05:02][198]>>
> ./fibonacci.gcc342.v9 36
> ./fibonacci.gcc342.v9: calculated 10 fibonacci(36)
> in 19.000000
> seconds
>
[steleman at obiwan][~/programming/fibonacci][11/05/2004
> 22:07:36][199]>>
> ./fibonacci.gcc342.v9 36
> ./fibonacci.gcc342.v9: calculated 10 fibonacci(36)
> in 19.000000
> seconds
>
[steleman at obiwan][~/programming/fibonacci][11/05/2004
> 22:07:58][200]>>
>
> It's actually consistently (3 times in a row)
> significantly worse.
>
> --Stefan
>
> ------
>
> On Friday 05 November 2004 21:58, Sunil wrote:
> > the same code and same compile arguments, I get
> around
> > 24% boost with gcc with -mtune=v9 instead of
> -mv8plus.
> > it is with gcc 3.3.4, gcc3.4.2 probably should do
> > better than that in bridging the gap. Can you
> please
> > post gcc-3.4.2 result with -mtune=v9?
> >
> > And I agree that it will still not be enough to
> > account for all of the difference in this
> benchmark.
> >
> > Thanks,
> > Sunil
>
> --
> Stefan Teleman 'Nobody Expects the Spanish
> Inquisition'
> steleman at nyc.rr.com -Monty
> Python
>
>
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