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[AMD] f16_gemm gluon kernel improve pipeline #10057

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Merged
antiagainst merged 1 commit into from
Apr 18, 2026
Merged

[AMD] f16_gemm gluon kernel improve pipeline #10057

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19 changes: 12 additions & 7 deletions third_party/amd/python/examples/gluon/f16_gemm_gfx1250.py
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Original file line number Diff line number Diff line change
Expand Up @@ -342,10 +342,14 @@ def gemm_tdm_pipelined_single_warp_per_simd_schedule_kernel(a_ptr, b_ptr, c_ptr,

loop_ub = ttgl.cdiv(K, BLOCK_K)
epilogue_lb = loop_ub - (NUM_BUFFERS - 1)

pred = 0 - epilogue_lb
pred = (pred >> 31) & 1
producer = issue_loads(producer, a_desc, b_desc, 0, 0, a_buffer, b_buffer, BLOCK_K, NUM_BUFFERS, TRANSPOSE_B,
pred=pred)

ttgl.assume(loop_ub > 0)
for i in range(0, loop_ub):
pred = i - epilogue_lb
pred = (pred >> 31) & 1
# SubIteration0
# LDS load SubIteration1
a1, b1 = lds_subtile_load(consumer, SUBTILE_LEN, a_buffer, OPERAND_LAYOUT_A, b_buffer, OPERAND_LAYOUT_B,
Expand All @@ -354,11 +358,6 @@ def gemm_tdm_pipelined_single_warp_per_simd_schedule_kernel(a_ptr, b_ptr, c_ptr,
accumulator = ttgl.amd.gfx1250.wmma(a0, b0, accumulator)

# SubIteration1
# TDM load for next tile
# If we are in epilogue, we have already issued our tile loads
producer = issue_loads(producer, a_desc, b_desc, 0, 0, a_buffer, b_buffer, BLOCK_K, NUM_BUFFERS, TRANSPOSE_B,
pred=pred)

# We prefetch distance - 1 iterations ahead because producer is already incremented by 1
issue_l2_prefetches(L2_PREFETCH_DISTANCE - 1, producer, a_desc, b_desc, 0, 0, BLOCK_K, TRANSPOSE_B)

Expand All @@ -378,6 +377,12 @@ def gemm_tdm_pipelined_single_warp_per_simd_schedule_kernel(a_ptr, b_ptr, c_ptr,
# SubIteration3
consumer += 1
ttgl.amd.gfx1250.tdm.async_wait((NUM_BUFFERS - 2) * 2)
# TDM load for next tile
# If we are in epilogue, we have already issued our tile loads
pred = (i + 1) - epilogue_lb
pred = (pred >> 31) & 1
producer = issue_loads(producer, a_desc, b_desc, 0, 0, a_buffer, b_buffer, BLOCK_K, NUM_BUFFERS, TRANSPOSE_B,
pred=pred)
# LDS load SubIteration0 for next tile
a0, b0 = lds_subtile_load(consumer, 0, a_buffer, OPERAND_LAYOUT_A, b_buffer, OPERAND_LAYOUT_B, NUM_BUFFERS,
TRANSPOSE_B, SUBTILE_LEN)
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