fix runtime crash when rnn model inference, test=develop (#31833) #31846
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Shixiaowei02
approved these changes
Mar 25, 2021
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PR types
Bug fixes
PR changes
OPs
Describe
cherry-pick到release2.0分支。修复了rnn动态图转静态图后运行时崩溃问题。
1、recurrent op的输入tensor在memory_optimizer_pass中被重命名的话，会导致相应的子block中的op找不着输入tensor.报错。因此将recurrent op加入到了memory_optimizer_pass的skip列表。
2、recurrent op执行时的内存回收会导致局部输出被拷贝到全局之前被释放。因此在recurrent op的执行子块中关闭垃圾回收机制。
3、recurrent op的局部输出拷贝到全局的逻辑有误，进行了修复。
4、 batch_norm kernel在训练时少传递了一个is_test参数，导致底层的is_test采用了默认值，出现了训练前向时和静态图推理时不精度不一致的情况。进行了补充。