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[SOT] Add unsafe cache fast path by DrRyanHuang · Pull Request #73372 · PaddlePaddle/Paddle · GitHub
SigureMo
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[SOT][3.13] Add unsafe cache fast path
[SOT] Add unsafe cache fast path
Jun 17, 2025
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[SOT] Add unsafe cache fast path #73372
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SigureMo
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python/paddle/jit/sot/opcode_translator/executor/executor_cache.py
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加个单测 |
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| cache: dict[ | ||
| types.CodeType, tuple[GuardedFunctions, paddle.framework.core.GuardTree] | ||
| ] | ||
| translate_count: int | ||
| code_symbolic_inputs: dict[types.CodeType, dict[str, None | dict[int, int]]] | ||
| compile_time_stats: dict[types.CodeType, float] | ||
| consecutive_cache_hit_count: dict[types.CodeType, int] | ||
| last_cache_index: dict[types.CodeType, int | None] |
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TODO: 太多 code 相关状态，后续单独拆出来一个 class 用来管理这些状态，OpcodeExecutorCache 用来管理 code 到这个状态的映射
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LGTMeow
SigureMo
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PR Category
Execute Infrastructure
PR Types
Improvements
Description
在推理场景下，通常只会命中同一个 cache，但目前每次都需要重新执行 guard 检查，这其实没有必要。因此，我们可以启用一种不安全的优化策略：如果同一个 cache 被连续命中超过一定次数（例如 32 次），则可以认为输入数据没有发生变化，直接返回该 cache，跳过 guard 检查，以提升推理效率。
这个策略通过环境变量
SOT_UNSAFE_CACHE_FASTPATH开启收益：（稳定后）某模型单Token时间从 35.9ms -> 29.8ms
cc @SigureMo
PCard-66972