问题：
tensorflow/core/common_runtime/bfc_allocator.cc:661] Chunk at 0x523cd7d00 of size 2048
tensorflow/core/common_runtime/bfc_allocator.cc:661] Chunk at 0x523cd8500 of size 9437184
tensorflow/core/common_runtime/bfc_allocator.cc:661] Chunk at 0x5245d8500 of size 2048
解决：尝试降低网络的深度和宽度、batch size 的大小
