alt Hacker NewsThe Nintendo switch 2 uses DCLS (Dual-core lockstep) in the BPMP and PSC (PSC is PSP-like but RISC-V). So yes, it helps - I'm unsure if/where msft uses it on their products.
The Nintendo switch 2 uses DCLS (Dual-core lockstep) in the BPMP and PSC (PSC is PSP-like but RISC-V). So yes, it helps - I'm unsure if/where msft uses it on their products.
DCLS actually makes sense for this scenario as the fault tolerance gained from having three processors isn't needed here. The system can halt when there's a mismatch, it doesn't have to perform a vote and continue running if 2 of 3 are getting the same result.
Also I just thought of this but it should be possible to design a chip where the second processor runs a couple cycles behind the first one, with all the inputs and outputs stashed in fifos. This would basically make any power glitches affect the two CPUs differently and any disrepancies would be easily detected.