Hacker News Reader

But... why?

How do you win moving your central controller from a 4GHz CPU to a multi-hundred-MHz single GPU core?

If we tried this, all we'd do is isolate a couple of cores in the GPU, let them run at some gigahertz, and then equip them with the additional operations they'd need to be good at coordinating tasks... or, in other words, put a CPU in the GPU.

Surprise: there are already CPUs in the GPU - they're called things like "Command Processor" (but not only) - they're often tiny in-order ARM or RISC-V cores.

This will never without completely reimagining how process isolation works and rewriting any OS you'd want to run on that architecture.

Sounds reminiscent of the CDC 6600, a big fast compute processor with a simple peripheral processor whose barreled threads ran lots of the O/S and took care of I/O and other necessary support functions.