Mesa 22.0 Gets RADV Ray-Tracing Performance Boost By Using Wave32 Mode

[bridgman]

Thanks, I had a nagging feeling it was 1 cycle, but I was too lazy to look it up and 2 somehow seemed to make sense.

I had a feeling you wanted to say 1 cycle

I guess that means that RDNA GPUs could actually cut the latency of Wave64 to 2 cycles, if not for breaking ISA compatibility?

I believe we do actually cut the latency to 2 cycles, at the cost of only running half as many waves in parallel (2 SIMDs/CU instead of 4).