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Re: Performance on an alpha 21164 using egcs 1.0.3 ???


Hello !

I moved my program to 533 MHz Alpha EV56 running red-hat Linux. (egcs)
On my 400 MHz pentiumpro with same 1.0.3 egcs program runs 30% faster.
There is no floating point, only a lot of integers. (some of them long, mostly
just int).

First I tried all optimization options. There were huge differencies on
execution time for
different options on Intel, while (beside O0/1/2) almoust none on Alpha.

DEC compiler was tried, and code runs 30% faster.

Is there anything I am supose to do/check/read/click ?

It is Beowulf of 21 Alphas and my program runs few hours, so it is worth trying.


Nothing usefull in sqrt discussion on this list a while ago:
Performance on an alpha 21164 using egcs 1.0.3 ??? by  Peter Biechele 


Best regards,

              Iztok


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