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little cpu question..

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Old 31 October 2002, 06:48 PM
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super_si
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ran this, just wonderd what the italics are
Dhrystone 2.1 2414
Whetstone 584
Eight queens problem 4086
Matrix operations 96380
Number crunch 70954
Floating point 6707
Memory throughput 607680
Si
Old 31 October 2002, 07:04 PM
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eboyling
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Question

What program did you run to get the output?

I assume it is some sort of benchmark program

Edward
Old 31 October 2002, 07:21 PM
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super_si
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some random program

here

Si
Old 31 October 2002, 07:32 PM
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chiark
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Dhrystone, whetstone are well known algorithms that are easy to implement yet computationally expensive, hence are used for benchmarking.
Old 31 October 2002, 08:04 PM
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super_si
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thanks mate, id seen them on sandra before.

What excaully does the algorithm do??

Si
Old 31 October 2002, 09:03 PM
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super_si
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STFW my self

Q: What is the Dhrystone benchmark?
A: The original Dhrystone benchmark is still widely used to measure CPU performance in industry under various versions/variants. The benchmark is designed to contain a representative sample of types of operations, mostly numerical, used by applications. Unfortunately this does not always represent a true real-life performance, but is useful to compare the speed of various CPUs.

The Dhrystone benchmark used here is a multi-threaded, 32/64-bit variant of the original one which runs under UNIX. Up to 64 CPUs in SMP systems are supported. The result is determined by measuring the time it takes to perform some sequences of instructions. Due to various changes, the result is not directly comparable with other Dhrystone benchmarks. However the MIPS (Million Instructions Per Second) should be the same for the same system (+5-10% variation) between benchmarks.

While the original benchmark does not compute anything, this version does check the results with the expected ones just in case there are problems with the CPU/memory.

Q: What is the Whetstone benchmark?
A: The Whetstone benchmark is widely used in the computer industry as a measure of FPU or Co-Processor performance. Floating-point arithmetic is most significant in programs that require a Co-Processor. These are mostly scientific, engineering, statistical and computer-aided design programs.

The Whetstone benchmark used here is a multi-threaded, 32/64-bit variant of the original one which runs under UNIX. Up to 64 CPUs in SMP systems are supported. The result is determined by measuring the time it takes to perform some sequences of floating-point instructions. Due to various changes, the result is not directly comparable with other Whetstone benchmarks. However the MFLOPS (Million FLoating OPerations per Second) should be the same for the same system (+5-10% variation) between benchmarks.
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