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Computer Measures of Performance
- 2. Clock Speed The time between pulses is called the cycle time A 3 GHz processor has 3000 million cycles per second However it cannot be taken for granted that the computer with the highest clock speed is the faster system as the number of cycles needed to carry out an instruction may vary between the processors. Which is faster - 3 GHz Pentium processor or a 3.2 GHz Pentium processor? Which is faster – 3 GHz Pentium processor or a 3 GHz AMD processor?
- 3. MIPS Millions of Instructions per Second = MIPS MIPS are a measure of how many millions of instructions the processor can execute in one second. Note that the machine cycle time is the time it takes to fetch and execute one instruction It cannot be taken for granted that the computer with the highest MIPS rate is the faster system because there is no standard set of instructions and so some processors use simpler and faster instructions than others.
- 4. FLOPS Floating Point Operations per Second = MIPS This is a measure of the arithmetical speed of a processor. The procedures involved in carrying out floating point multiplication are basically the same in every processor so FLOPS is a better measure than clock speed or MIPS when comparing system performance.
- 5. Benchmarks Benchmarks are a standard set of computer tasks designed to allow a computer’s performance to be measured.
- 6. Credits Higher Computing – Computer Structure – Measures of Performance Produced by P. Greene for the City of Edinburgh Council 2004 Adapted by M. Cunningham 2010 All images licenced under Creative Commons 3.0 • Blue Boost Gauge by Sandy Zieba • Purple Boost Gauge by Sandy Zieba • Intel Core i5 by Flutlicht PR on Flickr • AMD Athlon 64 CPU by Nayu Kim (nayukim on Flickr) • Windows, Mac y ubuntu en la oficina by Javier Aroche • Precision by Leonid Mamchenkov
- 7. Credits Higher Computing – Computer Structure – Measures of Performance Produced by P. Greene for the City of Edinburgh Council 2004 Adapted by M. Cunningham 2010 All images licenced under Creative Commons 3.0 • Blue Boost Gauge by Sandy Zieba • Purple Boost Gauge by Sandy Zieba • Intel Core i5 by Flutlicht PR on Flickr • AMD Athlon 64 CPU by Nayu Kim (nayukim on Flickr) • Windows, Mac y ubuntu en la oficina by Javier Aroche • Precision by Leonid Mamchenkov