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Apr 10, 2018
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Add title for kernel_hint_design.md & kernel_selection.md #9788

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4 changes: 3 additions & 1 deletion doc/fluid/design/muti_devices/kernel_hint_design.md
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# Problem
# Kernel Hint Design

## Problem
In PaddlePaddle's [Design](https://github.com/PaddlePaddle/Paddle/blob/develop/doc/design/switch_kernel.md), one Operator may have multiple kernels. Users may have some personal preference to choose a certain type of kernel for an operator, such as `force_cpu` to choose a CPU kernel, `use_cudnn` to choose a CUDNN kernel, we need to provide a way for users to do this.

In the current design, we use KernelType to describe one kernel.
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4 changes: 3 additions & 1 deletion doc/fluid/design/muti_devices/kernel_selection.md
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# Background
# Kernel Selection

## Background
Every operator has many kernels because there are multiple data types, places, data layout, library type that Fluid supports. We use the `OpKernelType ` to describe kernel types that operators can hold.

The `OpKernelType ` is as follows:
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