Vectorization on x86: all you need to know

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Vectorization on x86: all you need to know

  1. 1. VECTORIZATION ON X86 Roberto A. Vitillo (LBNL) 10/23/2013 Software & Computing workshop
  2. 2. Why do we care? 2.6 GHz SB-EP CPU, 8 cores 8 add + 8 mul FLOPs/cycle/core Theoretical performance in GFLOPS Theoretical performance / maximum multi-threaded and vectorized 166.4 100% multi-threaded and not vectorized 20.8 12.5% serial and vectorized 20.8 12.5% serial and not vectorized 2.6 1.6%

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