[kde-solaris] Re: fibonacci

[Stefan Teleman]

Using -fomit-frame-pointer does not seem to make any difference:

[steleman at obiwan][~/programming/fibonacci][11/05/2004 22:37:50][258]>> 
/usr/local/bin/gcc -m32 -mtune=v9 -fomit-frame-pointer -O3 
fibonacci.c  -o fibonacci.gcc342.v9.omit.frame.pointer
[steleman at obiwan][~/programming/fibonacci][11/05/2004 22:38:18][259]>> 
./fibonacci.gcc342.v9.omit.frame.pointer 36
./fibonacci.gcc342.v9.omit.frame.pointer: calculated 10 fibonacci(36) 
in 19.000000 seconds
[steleman at obiwan][~/programming/fibonacci][11/05/2004 22:38:48][260]>>

3 times in a row:

[steleman at obiwan][~/programming/fibonacci][11/05/2004 22:43:38][263]>> 
date ; ./fibonacci.gcc342.v9.omit.frame.pointer 36 ; date
Fri Nov  5 22:43:46 EST 2004
./fibonacci.gcc342.v9.omit.frame.pointer: calculated 10 fibonacci(36) 
in 19.000000 seconds
Fri Nov  5 22:44:06 EST 2004
[steleman at obiwan][~/programming/fibonacci][11/05/2004 22:44:06][264]>> 
date ; ./fibonacci.gcc342.v9.omit.frame.pointer 36 ; date
Fri Nov  5 22:44:07 EST 2004
./fibonacci.gcc342.v9.omit.frame.pointer: calculated 10 fibonacci(36) 
in 19.000000 seconds
Fri Nov  5 22:44:26 EST 2004
[steleman at obiwan][~/programming/fibonacci][11/05/2004 22:44:26][265]>> 
date ; ./fibonacci.gcc342.v9.omit.frame.pointer 36 ; date
Fri Nov  5 22:44:28 EST 2004
./fibonacci.gcc342.v9.omit.frame.pointer: calculated 10 fibonacci(36) 
in 19.000000 seconds
Fri Nov  5 22:44:48 EST 2004
[steleman at obiwan][~/programming/fibonacci][11/05/2004 22:44:48][266]>>

--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