Does an AMD 4-core processor runs better than an Intel dual core processor for parallel computing
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My basic idea is that AMD A10/A8 processor gets 4 cores, while Intel i5 has only two cores. In other words, with AMD, I can have 4 workers running on my laptop, get job done faster in parallel computing. Their prices, and clock speeds are similar, and I only care about the computation performance but not things like graphic performance and so on, so it seems that I will get advantage using AMD processors. But I could be wrong. Can anyone give me an answer for that? Thanks a lot!
Adam Filion on 12 Sep 2013
Assuming your hardware meets system requirements: http://www.mathworks.com/support/sysreq/current_release/index.html
Then I would expect 4 cores with 4 workers to outperform 2 with 2 during the parallel portion of your code, assuming equivalent clock speed. However there may be some other differences in performance on AMD vs Intel due to things like different underlying libraries etc. I'm not sure, don't know much about that comparison myself. Also keep in mind that's assuming we're discussing PHYSICAL cores, not virtual, as you should avoid running more than 1 worker per physical core.
Alex Taylor on 13 Sep 2013
In general, your parallel algorithm will scale in performance with number of threads.
Keep in mind though that some MATLAB functions are hardware optimized to use SSE instructions. AMD hardware will only support up to SSE2, where as the Intel i5 will be able to leverage more recent SSE instructions per core.
Profiling a specific code example is only way to accurately explore your question.