From: Wei Lin and Norbert Juffa (juffa@earthlink.net)
Date: Wed Jun 19 2002 - 01:37:34 CDT
Note that STREAM performance is just a few percent better than
for a previously reported Athlon systems using DDR-266 memory.
The bottleneck apparently is the Athlon FSB which is a 133 MHz
double data rate channel with 2.1 GB/s of bandwidth.
-- Norbert
CPU: AMD AthlonXP 2100+ CPU (1733 MHz)
motherboard: Asus A7V333
chipset: VIA KT333 chipset
memory: 512MB of Samsung DDR-333 ("PC2700")
OS: Windows NT4/SP6
compiler: Compaq Visual Fortran 6.6a, df -opt:5 -fast -arch:k7 -tune:k7
----------------------------------------------
Double precision appears to have 16 digits of accuracy
Assuming 8 bytes per DOUBLE PRECISION word
----------------------------------------------
Array size = 18901234
Offset = 0
The total memory requirement is 432 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 210000 microseconds
(= 21 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: 975.5476 0.3200 0.3100 0.3300
Scale: 975.5476 0.3110 0.3100 0.3200
Add: 1106.4137 0.4190 0.4100 0.4200
Triad: 1080.0705 0.4220 0.4200 0.4400
Sum of a is = 2.179880793656184E+019
Sum of b is = 4.359761587609160E+018
Sum of c is = 5.813015449509505E+018
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