Stream numbers from Tyan Tiger 133 with VIA Pro 133a chipset ...

[Richard Walsh]

All,

I wanted to get some feedback from others on the 
reasonableness of the following stream benchmark
for a Tyan Tiger 133 based cluster we have assembled. 
They are substantially less than those reported for 
a PIIIEB_600 on the stream site and are about the 
same as those reported for the 440_BX chipset with 
a Katmai 600. I was expecting better numbers.  Perhaps 
others have run the benchmark as well with a different 
compiler or options. 

Interested in your comments ...

rbw

System Specifications:

1. Dual PIII/EB 667 CPUs
2. 256 MB PC133 Memory (Micron no ECC)
3. VIA Pro 133a chipset with 133 FSB.

Compilation:

gcc -O3 stream_d.c second_wall.c -lm  
(under RHAT Linux 6.2/ kernel 2.2.15)

Results:

-------------------------------------------------------------
This system uses 8 bytes per DOUBLE PRECISION word.
-------------------------------------------------------------
Array size = 5000000, Offset = 0
Total memory required = 114.4 MB.
Each test is run 10 times, but only
the *best* time for each is used.
-------------------------------------------------------------
Your clock granularity/precision appears to be 1 microseconds.
Each test below will take on the order of 217494 microseconds.
   (= 217494 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:         335.6732       0.2385       0.2383       0.2391
Scale:        336.2616       0.2380       0.2379       0.2380
Add:          436.9053       0.2747       0.2747       0.2748
Triad:        309.8261       0.3877       0.3873       0.3882

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# Richard Walsh
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