Just got my hands on a Pentium II 400 MHz system with 440BX chipset &
100 MHz bus, SDRAM. Quite nice:
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This system uses 8 bytes per DOUBLE PRECISION word.
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Array size = 1000000, Offset = 0
Total memory required = 22.9 MB.
Each test is run 10 times, but only
the *best* time for each is used.
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Your clock granularity/precision appears to be 2 microseconds.
Each test below will take on the order of 43152 microseconds.
(= 21576 clock ticks)
Increase the size of the arrays if this shows that
you are not getting at least 20 clock ticks per test.
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WARNING -- The above is only a rough guideline.
For best results, please be sure you know the
precision of your system timer.
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Function Rate (MB/s) RMS time Min time Max time
Copy: 304.0377 0.0528 0.0526 0.0542
Scale: 307.9172 0.0521 0.0520 0.0523
Add: 363.3005 0.0661 0.0661 0.0661
Triad: 315.3577 0.0762 0.0761 0.0762
The system is running FreeBSD 3.0-980404-SNAP. Compiling with -O and -O6
gave the same results. Haven't tried changing the OFFSET in stream_d.c.
Steinar Haug, Nethelp consulting, sthaug@nethelp.no
This archive was generated by hypermail 2b29 : Tue Apr 18 2000 - 05:23:07 CDT