From: Wei Lin and Norbert Juffa (juffa@earthlink.net)
Date: Sun Oct 13 2002 - 16:10:46 CDT
I upgraded the compiler from CVF6.6A to CVF6.6B and see slightly higher results.
HW: Asus P4T533-C motherboard, Intel Pentium 4 2.8 GHz, 533 MHz FSB,
4 x 256MB Kingston PC1066 RDRAM w/o ECC (KVR1066X16-8/256)
SW: Windows NT4/SP6,
Compaq Visual Fortran 6.6b, -opt:5 -fast -arch:pn4 -tune:pn4
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Double precision appears to have 16 digits of accuracy
Assuming 8 bytes per DOUBLE PRECISION word
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Array size = 41234567
Offset = 0
The total memory requirement is 943 MB
You are running each test 10 times
The *best* time for each test is used
----------------------------------------------------
Your clock granularity/precision appears to be 10000 microseconds
The tests below will each take a time on the order
of 280000 microseconds
(= 28 clock ticks)
Increase the size of the arrays if this shows that
you are not getting at least 20 clock ticks per test.
----------------------------------------------------
WARNING -- The above is only a rough guideline.
For best results, please be sure you know the
precision of your system timer.
----------------------------------------------------
Function Rate (MB/s) RMS time Min time Max time
Copy: 1832.6475 0.3630 0.3600 0.3700
Scale: 1736.1923 0.3820 0.3800 0.3900
Add: 2249.1583 0.4420 0.4400 0.4600
Triad: 2249.1583 0.4420 0.4400 0.4500
Sum of a is = 4.755585832952547E+019
Sum of b is = 9.511171665799340E+018
Sum of c is = 1.268156221979185E+019
This archive was generated by hypermail 2.1.4 : Fri Nov 08 2002 - 13:37:15 CST