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kernels

The Kernel Hub allows Python libraries and applications to load compute kernels directly from the Hub. To support this kind of dynamic loading, Hub kernels differ from traditional Python kernel packages in that they are made to be:

  • Portable: a kernel can be loaded from paths outside PYTHONPATH.
  • Unique: multiple versions of the same kernel can be loaded in the same Python process.
  • Compatible: kernels must support all recent versions of Python and the different PyTorch build configurations (various CUDA versions and C++ ABIs). Furthermore, older C library versions must be supported.

The kernels Python package is used to load kernels from the Hub.

🚀 Quick Start

Install the kernels package with pip (requires torch>=2.5 and CUDA):

pip install kernels

Here is how you would use the activation kernels from the Hugging Face Hub:

import torch

from kernels import get_kernel

# Download optimized kernels from the Hugging Face hub
activation = get_kernel("kernels-community/activation", version=1)

# Random tensor
x = torch.randn((10, 10), dtype=torch.float16, device="cuda")

# Run the kernel
y = torch.empty_like(x)
activation.gelu_fast(y, x)

print(y)

You can search for kernels on the Hub.

📚 Documentation

Read the documentation of kernels.

Test coverage

To reproduce the coverage number reported on PRs locally:

uv run pytest --cov=kernels --cov-report=term-missing tests

CI measures coverage on a single canonical matrix cell (Python 3.10 / Torch 2.12.0) and posts a sticky comment on the PR; the threshold is 80% (warn-only — the check stays green either way).

Metadata

Release files for kernels 0.18.2

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for kernels 0.18.2
File Size Uploaded Provenance Actions
kernels-0.18.2.tar.gz 442.3 kB With provenance Details for kernels-0.18.2.tar.gz

Built distributions (wheels)

Table of built distributions (wheels) for kernels 0.18.2
File Actions
kernels-0.18.2-cp314-cp314t-win_amd64.whl CPython 3.14 CPython 3.14 free-threading Windows x86-64 Details for kernels-0.18.2-cp314-cp314t-win_amd64.whl
kernels-0.18.2-cp314-cp314t-win32.whl CPython 3.14 CPython 3.14 free-threading Windows x86-32 Details for kernels-0.18.2-cp314-cp314t-win32.whl
kernels-0.18.2-cp314-cp314t-musllinux_1_2_x86_64.whl CPython 3.14 CPython 3.14 free-threading Linux musl 1.2+ x86-64 Details for kernels-0.18.2-cp314-cp314t-musllinux_1_2_x86_64.whl
kernels-0.18.2-cp314-cp314t-musllinux_1_2_i686.whl CPython 3.14 CPython 3.14 free-threading Linux musl 1.2+ x86-32 Details for kernels-0.18.2-cp314-cp314t-musllinux_1_2_i686.whl
kernels-0.18.2-cp314-cp314t-musllinux_1_2_armv7l.whl CPython 3.14 CPython 3.14 free-threading Linux musl 1.2+ ARMv7l Details for kernels-0.18.2-cp314-cp314t-musllinux_1_2_armv7l.whl
kernels-0.18.2-cp314-cp314t-musllinux_1_2_aarch64.whl CPython 3.14 CPython 3.14 free-threading Linux musl 1.2+ ARM64 Details for kernels-0.18.2-cp314-cp314t-musllinux_1_2_aarch64.whl
kernels-0.18.2-cp314-cp314t-manylinux2014_x86_64.manylinux_2_17_x86_64.whl CPython 3.14 CPython 3.14 free-threading Linux glibc 2.17+ x86-64 Details for kernels-0.18.2-cp314-cp314t-manylinux2014_x86_64.manylinux_2_17_x86_64.whl
kernels-0.18.2-cp314-cp314t-manylinux2014_s390x.manylinux_2_17_s390x.whl CPython 3.14 CPython 3.14 free-threading Linux glibc 2.17+ IBM System/390x Details for kernels-0.18.2-cp314-cp314t-manylinux2014_s390x.manylinux_2_17_s390x.whl
kernels-0.18.2-cp314-cp314t-manylinux2014_ppc64le.manylinux_2_17_ppc64le.whl CPython 3.14 CPython 3.14 free-threading Linux glibc 2.17+ PowerPC 64-le Details for kernels-0.18.2-cp314-cp314t-manylinux2014_ppc64le.manylinux_2_17_ppc64le.whl
kernels-0.18.2-cp314-cp314t-manylinux2014_armv7l.manylinux_2_17_armv7l.whl CPython 3.14 CPython 3.14 free-threading Linux glibc 2.17+ ARMv7l Details for kernels-0.18.2-cp314-cp314t-manylinux2014_armv7l.manylinux_2_17_armv7l.whl
kernels-0.18.2-cp314-cp314t-manylinux2014_aarch64.manylinux_2_17_aarch64.whl CPython 3.14 CPython 3.14 free-threading Linux glibc 2.17+ ARM64 Details for kernels-0.18.2-cp314-cp314t-manylinux2014_aarch64.manylinux_2_17_aarch64.whl
kernels-0.18.2-cp314-cp314t-manylinux1_i686.manylinux_2_5_i686.whl CPython 3.14 CPython 3.14 free-threading Linux glibc 2.5+ x86-32 Details for kernels-0.18.2-cp314-cp314t-manylinux1_i686.manylinux_2_5_i686.whl
kernels-0.18.2-cp314-cp314t-macosx_11_0_arm64.whl CPython 3.14 CPython 3.14 free-threading macOS 11.0+ ARM64 Details for kernels-0.18.2-cp314-cp314t-macosx_11_0_arm64.whl
kernels-0.18.2-cp314-cp314t-macosx_10_12_x86_64.whl CPython 3.14 CPython 3.14 free-threading macOS 10.12+ x86-64 Details for kernels-0.18.2-cp314-cp314t-macosx_10_12_x86_64.whl
kernels-0.18.2-cp38-abi3-win_arm64.whl CPython 3.8 abi3 Windows ARM64 Details for kernels-0.18.2-cp38-abi3-win_arm64.whl
kernels-0.18.2-cp38-abi3-win_amd64.whl CPython 3.8 abi3 Windows x86-64 Details for kernels-0.18.2-cp38-abi3-win_amd64.whl
kernels-0.18.2-cp38-abi3-win32.whl CPython 3.8 abi3 Windows x86-32 Details for kernels-0.18.2-cp38-abi3-win32.whl
kernels-0.18.2-cp38-abi3-musllinux_1_2_x86_64.whl CPython 3.8 abi3 Linux musl 1.2+ x86-64 Details for kernels-0.18.2-cp38-abi3-musllinux_1_2_x86_64.whl
kernels-0.18.2-cp38-abi3-musllinux_1_2_i686.whl CPython 3.8 abi3 Linux musl 1.2+ x86-32 Details for kernels-0.18.2-cp38-abi3-musllinux_1_2_i686.whl
kernels-0.18.2-cp38-abi3-musllinux_1_2_armv7l.whl CPython 3.8 abi3 Linux musl 1.2+ ARMv7l Details for kernels-0.18.2-cp38-abi3-musllinux_1_2_armv7l.whl
kernels-0.18.2-cp38-abi3-musllinux_1_2_aarch64.whl CPython 3.8 abi3 Linux musl 1.2+ ARM64 Details for kernels-0.18.2-cp38-abi3-musllinux_1_2_aarch64.whl
kernels-0.18.2-cp38-abi3-manylinux2014_x86_64.manylinux_2_17_x86_64.whl CPython 3.8 abi3 Linux glibc 2.17+ x86-64 Details for kernels-0.18.2-cp38-abi3-manylinux2014_x86_64.manylinux_2_17_x86_64.whl
kernels-0.18.2-cp38-abi3-manylinux2014_s390x.manylinux_2_17_s390x.whl CPython 3.8 abi3 Linux glibc 2.17+ IBM System/390x Details for kernels-0.18.2-cp38-abi3-manylinux2014_s390x.manylinux_2_17_s390x.whl
kernels-0.18.2-cp38-abi3-manylinux2014_ppc64le.manylinux_2_17_ppc64le.whl CPython 3.8 abi3 Linux glibc 2.17+ PowerPC 64-le Details for kernels-0.18.2-cp38-abi3-manylinux2014_ppc64le.manylinux_2_17_ppc64le.whl
kernels-0.18.2-cp38-abi3-manylinux2014_armv7l.manylinux_2_17_armv7l.whl CPython 3.8 abi3 Linux glibc 2.17+ ARMv7l Details for kernels-0.18.2-cp38-abi3-manylinux2014_armv7l.manylinux_2_17_armv7l.whl
kernels-0.18.2-cp38-abi3-manylinux2014_aarch64.manylinux_2_17_aarch64.whl CPython 3.8 abi3 Linux glibc 2.17+ ARM64 Details for kernels-0.18.2-cp38-abi3-manylinux2014_aarch64.manylinux_2_17_aarch64.whl
kernels-0.18.2-cp38-abi3-manylinux1_i686.manylinux_2_5_i686.whl CPython 3.8 abi3 Linux glibc 2.5+ x86-32 Details for kernels-0.18.2-cp38-abi3-manylinux1_i686.manylinux_2_5_i686.whl
kernels-0.18.2-cp38-abi3-macosx_11_0_arm64.whl CPython 3.8 abi3 macOS 11.0+ ARM64 Details for kernels-0.18.2-cp38-abi3-macosx_11_0_arm64.whl
kernels-0.18.2-cp38-abi3-macosx_10_12_x86_64.whl CPython 3.8 abi3 macOS 10.12+ x86-64 Details for kernels-0.18.2-cp38-abi3-macosx_10_12_x86_64.whl

Total release size: 82.5 MB

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