多核架构的性能在哪里？ Where is my performance? [pic]Atul Verma Without a doubt multicore processing is becoming more mainstream these days. Multicore programming or parallel programming is no longer confined to esoteric applications coded by ninja programmers.  Advancements in tools and multicore programming paradigms such as OpenMP have certainly made programming simpler. However, as more and more programmers get drawn to the field of multicore, some get frustrated by the results. One question I get quite often is: Why don’t I get 8 times greater performance when moving from 1 to 8 cores? This is a result of wrong expectations and some misconceptions.  As much as the chip architecture is important for multicore performance, there are software considerations that ……