Sandia: Memory bus limits multicore speedup

Could it be that additional cores actually result in a slower machine? A new study by Sandia for the U.S. Department of Energy’s National Nuclear Security Administration says that’s exactly what can happen:
“Using algorithms for deriving knowledge from large data sets, Sandia simulations found a significant increase in speed going from two to four multicores, but an insignificant increase from four to eight multicores. Exceeding eight multicores caused a decrease in speed. Sixteen multicores performed barely as well as two, and after that, a steep decline is registered as more cores are added, Sandia reported.” Full Story

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About Rich
FlexRex began his life as a cartoon character I created a Sun Microsystems. As the world's first "fictional blogger," he appeared in numerous parody films that made fun of the whole work-from-home thing. Somewhere along the line, the Sun IT department adopted FlexRex as their spokesman in a half-dozen security awareness films for employees. So when I left Sun recently, I started FlexRex Communications, a Marketing company in Portland, Oregon.

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