FIX: (None,0,None,0) for ALL tma_partition outputs — verified shapes on B200
DIAG OUTPUT (n=256, inside @cute.kernel):
tAgQ: (((64,128),1), Int32(?), Int32(?), Int32(?)) — 4 modes
tBgK: (((64,128),1), Int32(?), Int32(?), Int32(?)) — 4 modes
tVgV: (((64,128),1), 1, 1, 1) — 4 modes
After (None,0,None,0) → keeps modes 0 and 2 free → 2D:
tAgQ: (((64,128),1), Int32(?))
tBgK: (((64,128),1), Int32(?))
tVgV: (((64,128),1), 1)
Then [None, kt] indexes the surviving mode 1 (originally mode 2 = KV tiles).
tAgQ[(None, Int32(0))] for Q (1 tile, coordinate is always 0).
Removed diag prints from test_fmha_v3.py.
biondizzle
0dc1fe5f71