Run_program_op add scope cache & reuse #45813
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zhangbo9674
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Sep 19, 2022
* add scope cache & reuse * add gc scope for end of each train step * del scope reuse for jit * refine code * test
phlrain
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Sep 20, 2022
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PR types
Performance optimization
PR changes
OPs
Describe
动转静调用run_program_op的执行过程中，每个step都会传入新的scope，在动转静接入新执行器，新执行器替换scope的开销较大，本pr设计了scope的cache和reuse策略，使得每个step无需传入新的scope，节省新执行器替换scope的开销。
Scope缓存的原则：
run_program_op内部通过program_id对执行器（interpretercore）进行缓存，为保证执行器与scope一致，因此，python 端的 partial_program 同样根据 program_id 对 scope 进行缓存，保证每个 program 对应同一套 执行器及 scope。
Scope复用的原则：