[slimtensor] Introduce Device and ScalarType headers for SlimTensor minimal support #16382
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…inimal support This diff introduces the foundational c10 core headers for SlimTensor, a lightweight tensor implementation used by torchnative, to cuda backend runtime and further it will be used by all aoti-driven backends like MPS. We add: - DeviceType.h - Device type enum (CPU only for now) - Device.h - Device class representing compute device location - ScalarType.h - Scalar type enum with elementSize() helper (Float only for now) These headers are modeled after PyTorch's c10 but simplified for our needs. The enum values are kept compatible with PyTorch for serialization compatibility. This is the first step in migrating SlimTensor to replace ETensor as the internal tensor representation in CUDA backend. Future diffs will add Storage, SlimTensor class, and additional dtypes/devices incrementally. Differential Revision: [D89747061](https://our.internmc.facebook.com/intern/diff/D89747061/) [ghstack-poisoned]
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…limTensor minimal support" This diff introduces the foundational c10 core headers for SlimTensor, a lightweight tensor implementation used by torchnative, to cuda backend runtime and further it will be used by all aoti-driven backends like MPS. We add: - DeviceType.h - Device type enum (CPU only for now) - Device.h - Device class representing compute device location - ScalarType.h - Scalar type enum with elementSize() helper (Float only for now) These headers are modeled after PyTorch's c10 but simplified for our needs. The enum values are kept compatible with PyTorch for serialization compatibility. This is the first step in migrating SlimTensor to replace ETensor as the internal tensor representation in CUDA backend. Future diffs will add Storage, SlimTensor class, and additional dtypes/devices incrementally. Differential Revision: [D89747061](https://our.internmc.facebook.com/intern/diff/D89747061/) [ghstack-poisoned]
This was referenced Dec 26, 2025
…limTensor minimal support" This diff introduces the foundational c10 core headers for SlimTensor, a lightweight tensor implementation used by torchnative, to cuda backend runtime and further it will be used by all aoti-driven backends like MPS. We add: - DeviceType.h - Device type enum (CPU only for now) - Device.h - Device class representing compute device location - ScalarType.h - Scalar type enum with elementSize() helper (Float only for now) These headers are modeled after PyTorch's c10 but simplified for our needs. The enum values are kept compatible with PyTorch for serialization compatibility. This is the first step in migrating SlimTensor to replace ETensor as the internal tensor representation in CUDA backend. Future diffs will add Storage, SlimTensor class, and additional dtypes/devices incrementally. Differential Revision: [D89747061](https://our.internmc.facebook.com/intern/diff/D89747061/) [ghstack-poisoned]
This was referenced Jan 5, 2026
This was referenced Jan 5, 2026
…limTensor minimal support" This diff introduces the foundational c10 core headers for SlimTensor, a lightweight tensor implementation used by torchnative, to cuda backend runtime and further it will be used by all aoti-driven backends like MPS. We add: - DeviceType.h - Device type enum (CPU only for now) - Device.h - Device class representing compute device location - ScalarType.h - Scalar type enum with elementSize() helper (Float only for now) These headers are modeled after PyTorch's c10 but simplified for our needs. The enum values are kept compatible with PyTorch for serialization compatibility. This is the first step in migrating SlimTensor to replace ETensor as the internal tensor representation in CUDA backend. Future diffs will add Storage, SlimTensor class, and additional dtypes/devices incrementally. Differential Revision: [D89747061](https://our.internmc.facebook.com/intern/diff/D89747061/) [ghstack-poisoned]
…limTensor minimal support" This diff introduces the foundational c10 core headers for SlimTensor, a lightweight tensor implementation used by torchnative, to cuda backend runtime and further it will be used by all aoti-driven backends like MPS. We add: - DeviceType.h - Device type enum (CPU only for now) - Device.h - Device class representing compute device location - ScalarType.h - Scalar type enum with elementSize() helper (Float only for now) These headers are modeled after PyTorch's c10 but simplified for our needs. The enum values are kept compatible with PyTorch for serialization compatibility. This is the first step in migrating SlimTensor to replace ETensor as the internal tensor representation in CUDA backend. Future diffs will add Storage, SlimTensor class, and additional dtypes/devices incrementally. Differential Revision: [D89747061](https://our.internmc.facebook.com/intern/diff/D89747061/) [ghstack-poisoned]
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…inimal support (#16547) This PR was created by the merge bot to help merge the original PR into the main branch. ghstack PR number: #16382 by @Gasoonjia ^ Please use this as the source of truth for the PR details, comments, and reviews ghstack PR base: https://github.com/pytorch/executorch/tree/gh/gasoonjia/73/base ghstack PR head: https://github.com/pytorch/executorch/tree/gh/gasoonjia/73/head Merge bot PR base: https://github.com/pytorch/executorch/tree/main Merge bot PR head: https://github.com/pytorch/executorch/tree/gh/gasoonjia/73/orig Differential Revision: [D89747061](https://our.internmc.facebook.com/intern/diff/D89747061/) @diff-train-skip-merge Co-authored-by: gasoonjia <[email protected]>
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Stack from ghstack (oldest at bottom):
This diff introduces the foundational c10 core headers for SlimTensor, a lightweight tensor implementation used by torchnative, to cuda backend runtime and further it will be used by all aoti-driven backends like MPS.
We add:
These headers are modeled after PyTorch's c10 but simplified for our needs. The enum values are kept compatible with PyTorch for serialization compatibility.
This is the first step in migrating SlimTensor to replace ETensor as the internal tensor representation in CUDA backend. Future diffs will add Storage, SlimTensor class, and additional dtypes/devices incrementally.
Differential Revision: D89747061