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[CINN] Coalesce read for transpose+reduce fusion by lshpku · Pull Request #66419 · PaddlePaddle/Paddle · GitHub
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Ensure coalesce read for transpose+reduce fusion
Coalesce read for transpose+reduce fusion
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Coalesce read for transpose+reduce fusion
[CINN] Coalesce read for transpose+reduce fusion
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[CINN] Coalesce read for transpose+reduce fusion #66419
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[CINN] Coalesce read for transpose+reduce fusion #66419
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PR Category
CINN
PR Types
Performance
Description
When
transposeandreduceare fused in aFusionOp, the input and output have different axis order. CINN used to align the loops to the output, which made write coalesced and read not coalesced. However, asreducereads much more than it writes, we will get better performance if we make read coalesced.This PR reorders spatial/reduce loops to match the memory layout of input (instead of output) at the beginning of
TileFirstGeneralTactic. The relation between loops and input is stored in theloop_transform_map.pcard-85711