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lazy-load: _sdpa_single_block_bwd_dkdv & _sdpa_single_block_bwd_dq #405

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lazy-load: _sdpa_single_block_bwd_dkdv & _sdpa_single_block_bwd_dq #405

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5 changes: 5 additions & 0 deletions mojo_opset/backends/ttx/kernels/npu/swa.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1930,6 +1930,8 @@ def _sdpa_single_block_bwd_dkdv(

# Load (transposed) K block
q = tl.load(Q_block_ptr, boundary_check=(0, 1), padding_option="zero")
tl.extra.cann.extension.compile_hint(q, "cv_pipeline_lazy_load", True)

# q_T = tl.trans(q)
# qkT = tl.dot(k, q_T) # [BLOCK_N, BLOCK_M]
k_T = tl.trans(k)
Expand All @@ -1949,6 +1951,8 @@ def _sdpa_single_block_bwd_dkdv(
# -- Compute dV ----
# dv = pT @ do
do = tl.load(DO_block_ptr, boundary_check=(0, 1), padding_option="zero")
tl.extra.cann.extension.compile_hint(do, "cv_pipeline_lazy_load", True)

dv = tl.dot(tl.trans(p_cast), do, dv_ptr)

# -- Compute dS ----
Expand Down Expand Up @@ -1990,6 +1994,7 @@ def _sdpa_single_block_bwd_dq(

# Load (transposed) K block
k = tl.load(K_block_ptr, boundary_check=(0, 1), padding_option="zero")
tl.extra.cann.extension.compile_hint(k, "cv_pipeline_lazy_load", True)
k_T = tl.trans(k)
qk = tl.dot(q, k_T) # [BLOCK_M, BLOCK_N]
# tl.extra.cann.extension.compile_hint(qk, "tile_cube_loop")
Expand Down