A Pi-Powered Plan 9 Cluster

Re:A Pi-Powered Plan 9 Cluster by kingosticks on Tuesday October 13, 2020 @11:53AM (#24766759)

28nm vs 5nm, is what, 3 generations with a 20-30% power saving at each step. ~50% power reduction is something.

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Re:A Pi-Powered Plan 9 Cluster by bullen on Tuesday October 13, 2020 @12:09PM (#24766893)

Nope, if you compare theoretical Gflops/watt it's probably 30%, but in practice you'll only get maybe 15%. Memory speed is the bottleneck and you cannot get around that. DDR3 had lower latency than DDR6 and only bandwidth is increasing, and you have to ask bandwidth for what?

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Re:A Pi-Powered Plan 9 Cluster by kingosticks on Tuesday October 13, 2020 @12:59PM (#24767433)

Sorry, I don't follow. Why would anything be getting faster if we are talking about hypothetically utilising (just) the power-saving gains from newer nodes?

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Re:A Pi-Powered Plan 9 Cluster by bullen on Tuesday October 13, 2020 @02:37PM (#24768617)

Basically Gflops/watt is not going north of 1 for 32-bit CPUs, so humanity is completely out of growth. This is the end. Game Over!

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