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pytorch/ios
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Tao Xu 6de6041585 [iOS] Disable NNPACK on iOS builds (#39868) 
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/39868

### Summary

why disable NNPACK on iOS

- To stay consistency with our internal version
- It's currently blocking some external users due to its lack support of x86 architecture
    - https://github.com/pytorch/pytorch/issues/32040
    - https://discuss.pytorch.org/t/undefined-symbols-for-architecture-x86-64-for-libtorch-in-swift-unit-test/84552/6
- NNPACK uses fast convolution algorithms (FFT, winograd) to reduce the computational complexity of convolutions with large kernel size. The algorithmic speedup is limited to specific conv params which are unlikely to appear in mobile networks.
- Since XNNPACK has been enabled, it performs much better than NNPACK on depthwise-separable convolutions which is the algorithm being used by most of mobile computer vision networks.

### Test Plan

- CI Checks

Test Plan: Imported from OSS

Differential Revision: D22087365

Pulled By: xta0

fbshipit-source-id: 89a959b0736c1f8703eff10723a8fbd02357fd4a
2020-06-17 01:39:56 -07:00
..
TestApp [iOS] Disable NNPACK on iOS builds (#39868) 2020-06-17 01:39:56 -07:00
.gitignore Add iOS test app skeleton (#26261) 2019-09-17 11:06:57 -07:00
LibTorch.h Change the source link in podspec (#26089) 2019-09-13 15:00:31 -07:00
LibTorch.podspec [iOS] 1.5.0 Cocoapods Release (#37039) 2020-04-22 10:36:18 -07:00
README.md Update the link for iOS demo app in README.md (#27145) 2019-10-03 13:43:58 -07:00

README.md

PyTorch for iOS

Cocoapods Developers

PyTorch is now available via Cocoapods, to integrate it to your project, simply add the following line to your Podfile and run pod install

pod 'LibTorch'

Import the library

For Objective-C developers, simply import the umbrella header

#import <LibTorch/LibTorch.h>

For Swift developers, you need to create an Objective-C class as a bridge to call the C++ APIs. We highly recommend you to follow the Image Classification demo where you can find out how C++, Objective-C and Swift work together.

Disable Bitcode

Since PyTorch is not yet built with bitcode support, you need to disable bitcode for your target by selecting the Build Settings, searching for Enable Bitcode and set the value to No.

LICENSE

PyTorch is BSD-style licensed, as found in the LICENSE file.