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.. meta::
:description: Composable Kernel structure
:keywords: composable kernel, CK, ROCm, API, structure
.. _what-is-ck:
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Composable Kernel structure
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The Composable Kernel library uses a tile-based programming model and tensor coordinate transformation to achieve performance portability and code maintainability. Tensor coordinate transformation is a complexity reduction technique for complex machine learning operators.
.. image:: ../data/ck_component.png
:alt: CK Components
The Composable Kernel library consists of four layers:
* a templated tile operator layer
* a templated kernel and invoker layer
* an instantiated kernel and invoker layer
* a client API layer.
A wrapper component is included to simplify tensor transform operations.
.. image:: ../data/ck_layer.png
:alt: CK Layers
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