Table 8. The performance correlation between the SpecFP2000 marks and the best GAUSSIAN 98 results on PC-Linux systems. The results obtained on PC-Linux systems are compiled using "ifc -O2 -unroll" with the listed architectural optimization options, and linked against corresponding numerical libraries. The summation over CPU time includes all the test-files listed in Table II except test364, the second part of test415 and the first part of test439. All ratios are relative to the Alpha500 system.
|
System Name |
Alpha500 |
TB1 |
XP1A |
XP1N |
TB2 |
TBMP2 |
XP2 |
P41.8G |
P41.8G |
P41.8G |
|
FORTRAN Compiler |
f90 |
ifc |
ifc |
ifc |
ifc |
ifc |
ifc |
ifc |
ifc |
ifc |
|
Architectural optimizations |
-tune ev6 -arch ev6 |
-tpp6 |
-tpp6 |
-tpp6 |
-tpp6 |
-tpp6 |
-tpp6 |
-tpp7 |
-tpp7 |
-tpp7 -axW |
|
Numerical Library |
DXML |
ATLAS |
ATLAS |
ATLAS |
ATLAS |
ATLAS |
ATLAS |
BLAS |
ATLAS |
ATLAS |
|
Sum of CPU time |
2213 |
1992 |
1565 |
1358 |
1990 |
2045 |
1790 |
1241 |
1175 |
1133 |
|
Inverse ratio of time |
1.00 |
1.11 |
1.41 |
1.63 |
1.11 |
1.08 |
1.24 |
1.78 |
1.88 |
1.95 |
|
SpecFP2000 base |
383 |
365 a |
510 |
624 b |
426 |
433 |
483 |
669 |
669 |
669 |
|
SpecFP2000 ratio |
1.00 |
0.95 |
1.33 |
1.63 |
1.11 |
1.13 |
1.26 |
1.75 |
1.75 |
1.75 |
|
SpecFP2000 peak |
422 |
393 a |
549 |
688 b |
458 |
481 |
526 |
678 |
678 |
678 |
|
SpecFP2000 ratio |
1.00 |
0.93 |
1.30 |
1.63 |
1.09 |
1.14 |
1.25 |
1.61 |
1.61 |
1.61 |
a Estimated by the clock frequency.
b Estimated by the benchmark results of GAUSSIAN 98.