Aeneas Single Node Performance

 

Simplicial Gravity code, run on a single node.

Mostly scalar code with many short loops and a few trig calls.

Compiler

PPro 200

PII 300

Relative speedup
Absoft f77 -O

4.25 sec (60 Mflops)

2.92 sec (86 Mflops)

+46%

Gnu g77 –O2

5.75 sec (43 Mflops)

3.80 sec (66 Mflops)

+50%

 
 
Mflop rates from Cray C90 Hardware Performance Monitor (HPM).
 

Absoft native f77 compiler is about 30% faster than Gnu g77 compiler.

 
 
 
Herbert W. Hamber 10/16/1997