I have a question About Compute Power Xeon E5-2698 V3 ?
The computational power of a processor (Gflops And TFlops)
Please explain to me how can I calculate the computational power of a processor.
Theoretical sp (fp32) :
frequency * 8 (number of fp32 in AVX 2.0) * 2 (FMA instruction = fadd + fmul) * 2 (number of FMA units) * cores
2.3 * 8 * 2 * 2 * 16 = 1177Gflops
Theoretical dp (fp64) :
frequency * 4 (number of fp64 in AVX 2.0) * 2 (FMA instruction = fadd + fmul) * 2 (number of FMA units) * cores
The above is without the 5 cycles latency of the FMA units which obviously will have a large impact on the performance.
This is not achievable in reality, since Xeon's will lower the frequency when using AVX and not many algorithms contains 100% of unrelated FMA instructions.