
08-21-2003, 01:44 AM
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Pupil
Join Date: Jun 2003
Posts: 47
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spb benchmark cpu index
I wonder if the CPU index has some OS function calls in it. Because, if it does, it's not a CPU speed indicator anymore. I've had my doubts about it since the first time I saw the results.
Ah, the methods are documented.
Quote:
From Spb benchmark web page
CPU index
Indicates overall CPU and memory speed. It is the average speed of the following tests taken with the following weights:
Test Factor
Compress 1 MB file using ZIP 30
Decompress 1024x768 JPEG file 30
CPU test: Whetstones MWIPS 15
Copy 1MB using memcpy() 25
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Well well... I hope that ZIP test and JPEG test have no I/O! Why? Because any changes in buffering and VM code in the OS will invalidate the results! They're also the most heavily weighted scores...
edit: The same also applies to memcpy test, unless the pages were precommitted - OS VM code changes might affect the test results.
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