c5dfaee98aea0d2ac8941174155594bc5a1d31e3
Root cause: BI-V100 warp size may be 64 (not 32). Old kernel used dim3(32,4) assuming 4 independent warps per block, but with warpSize=64 two rows shared the same warp → __shfl_sync mixed their data. Debug proof: Row 0 == Row 1, Row 2 == Row 3 (identical outputs). Even rows correct, odd rows duplicated. Fix: 1 block = 1 row = 64 threads (1 per expert). All reductions use shared memory (block_reduce_max/sum/argmax) instead of warp shuffle. Zero warp-size dependency.
project_6
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