25 lines
1007 B
C
25 lines
1007 B
C
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#pragma once
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#include <ATen/ATen.h>
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namespace at::caching {
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// Some systems (just cudagraphs currently) will persist a static tensor output
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// whose TensorImpl does not change across iterations. For these tensors caching
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// dtype conversions is invalid. Additionally, there will be an extra reference
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// count to these cached tensors that would prevent buffer inplacing and other
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// checks on tensor uniqueness. If we are not using these systems the enabled
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// flag will be false and we will avoid the hash lookup.
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TORCH_API bool is_cached_tensor(const at::Tensor& t);
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TORCH_API void add_cached_tensor(const at::Tensor& t);
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TORCH_API void remove_cached_tensor(const at::Tensor& t);
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TORCH_API void set_cached_tensors_enabled(bool enable);
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// For gradient buffer stealing we will adjust the use count of tensors
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// which are persisted by cudagraphs, just as we need to adjust reference
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// count of tensors with hooks.
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TORCH_API size_t adjusted_use_count(const at::Tensor& t);
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} // namespace at::caching
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