15版 - 柬埔寨促进制造业多元化发展

· · 来源:tutorial网

In the presence of property-based testing I consider the techniques shown in this post to be fully appropriate for production codebases, so long as a recursive reference implementation is maintained and used as a test oracle.

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By default, freeing memory in CUDA is expensive because it does a GPU sync. Because of this, PyTorch avoids freeing and mallocing memory through CUDA, and tries to manage it itself. When blocks are freed, the allocator just keeps them in their own cache. The allocator can then use the free blocks in the cache when something else is allocated. But if these blocks are fragmented and there isn’t a large enough cache block and all GPU memory is already allocated, PyTorch has to free all the allocator cached blocks then allocate from CUDA, which is a slow process. This is what our program is getting blocked by. This situation might look familiar if you’ve taken an operating systems class.

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