![]() ![]() The reported 3.8 TF is 67.7% of the *maximum* AVX-512 peak performance, but large HPL runs are always power-limited when running in AVX-512 mode on SKX processors, so you should not expect to see the maximum 2.2 GHz. This means that the processor is able to run faster than the "base" AVX-512 frequency of 1.6 GHz. The 3.81255 TFLOPS reported at the web site above is 106.4% of the "base" peak performance. This level of performance is not achievable (even theoretically) because the processor cannot run that fast while running AVX512 instructions. The 6.144 TFLOPS "theoretical" peak is based on the 2.4 GHz "nominal" frequency of the processor. ![]() This gives a "base" peak performance of 20 cores * 32 FLOPS/Cycle * 1.4 GCycle/s = 0.896 TFLOPS per socket (3.584 TFLOPS/node), and a maximum theoretical peak for AVX-512 code of 20 cores * 32 FLOPS/Cycle * 2.2 GCycle/s = 1.408 TFLOPs per socket (5.632 TFLOPS/node). According to Figure 3 in the "Intel Xeon Processor Scalable Family: Specification Update" (document 336065-005, February 2018), the Xeon Gold 6148 processor has a "base" AVX-512 frequency of 1.6 GHz, and a maximum all-core AVX-512 frequency of 2.2 GHz. ![]()
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