Effects of Memory Latency - Testing=SuperPi, Sandra
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SuperPi
Super pi was the first test to be run. It is a simple program; it just calculates the digits of pi. The user can chose from 16 thousand to 32 million digits of pi. I ran the program to figure out the first million numbers of pi. Lower times are better.
As the graph shows above, memory latency does affect system performance. The difference is not huge, but there’s a second gained on each of the tests. Super pi is heavily math based; it just calculates and tells you the time. To actually get the million digits to pi, you must go to their site. Very few real world programs would have a need for a million digits, but if you do a lot of math based calculations, then latency might concern you.
Sandra
Sandra is a very nice suite of applications which test, bench, and burn in, different parts of the computer. For the effect of Latency, we look at the memory bandwidth. Bandwidth is like the lanes on the highway: the more you have, the better the traffic will be.
With a 168 MB/s difference, memory latency plays a role in the bandwidth. Some programs may make use of the extra bandwidth, while some look in different directions for maximized performance.
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