Jun 202011
 

The list of Top 500 fastest computers in the world just came out and the Japanese K-computer is the fastest and the most energy-efficient computer at the same time. It is hard to build computers that are both fast and energy-efficient so I set out to understand what Fujitsu has done right. This quick post is a summary of my investigation. For the very impatient, my crude experience-based analysis says that the special purpose instructions and highly specialized functional units in the core give them their edge.

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