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SIMD heavy CPUs can provide quite respectable HPC throughout. The US Dept of Energy had very favorable things to say about the Fujitsu A64FX, which is architec
by brucethemoose2 3y ago
SIMD heavy CPUs can provide quite respectable HPC throughout.
The US Dept of Energy had very favorable things to say about the Fujitsu A64FX, which is architecturally similar to the SiPearl Rhea (HBM memory, ARM SVE happy, fast interconnect): https://www.osti.gov/biblio/1965278 https://www.osti.gov/biblio/1965278
They seemed to like the easy porting and flexible programming (since its "just" CPU SIMD) and specifically describe it as competitive with Nvidia:
> To highlight, the pink line represents the energy efficiency metric for A64FX in boost power mode (described in Section IV-C) with an estimated TDP of 140
W and surpassed by the red and yellow lines that represent data for the Volta V100 GPU (highest) and KNL, respectively. The A64FX architecture scores better with
the energy efficiency metric relative to the performance efficiency metric due to its low power consumption.
In fact, ARM A64FX supercomputers topped the Green500 for some time, which is the global supercomputer power efficiency ranking, outclassing Nvidia/Intel/AMD machines.