geerten kuiper (firstname.lastname@example.org)
Sun, 03 Jan 1999 14:23:39 +0100
- as always, much depends on what your program is trying to do.
- make shure you use the improved math libraries (I think
has the latest.)
- David Mosberger once wrote an article on optimizing code for Alpha. You
may be able to find it somewhere on the web. Cache optimization is the main
thing to realize the Alphas full potential.
- using 64 bit floats will probably be almost as fast as 32 bits (contrary
to your PentiumII, where it will be much slower.)
- on some older Alpha boxes, memory bandwith limits performance. On your XL
this should be less of an issue (is it 128 or 256 bits wide ?)
At 12:21 03/01/99 +0100, you wrote:
>i'm testing some programms, the C programm uses 32 bits floats, My 366XL
>alpha is slower in his output than my cheaper-than-cheap Pii266...
>i use EGCS 1.0.3a ( for Mesa also.. Mesa gives a internal compiler error
>with 1.1.1 ;-( )
>can i speed up the code with 64 bits floats ?? or can i set beter
>optimizing the -O2 ???
Geerten Kuiper | "It is customary to append a signature or
Corn. Houtmanstraat 113 | .sig to a mail message, usually containing
2593 RG Den Haag | information on the author, along with a
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| Olaf Kirch
| LINUX Network Administrators Guide
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