solve slice inplace illegal memory address bug#34265
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wzzju merged 1 commit intoPaddlePaddle:developfrom Jul 21, 2021
Merged
solve slice inplace illegal memory address bug#34265wzzju merged 1 commit intoPaddlePaddle:developfrom
wzzju merged 1 commit intoPaddlePaddle:developfrom
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PR types
Bug fixes
PR changes
OPs
Describe
问题
decoupledsegnet、hardnet单卡，batch_size=1训练报错，问题定位于PR32266。
原因
经
cuda-memcheck排查发现在ElemwiseGradBroadcast2CUDAKernel处出现了非法内存访问导致出core。经分析原因在于Tensor实际分配大小与需求不一致，定位问题点在于SliceGradKernel的need_pad_num == 0判断有问题，直接跳过导致没有分配合适的空间，删去该判断逻辑后运行就正常了。