iOS TVM RPC
This folder contains iOS RPC app that allows us to launch an rpc server on a iOS device(e.g. ipython) and connect to it through python script and do testing on the python side as normal TVM RPC. You will need XCode and an iOS device to use this.
Before start, please run
init_proj.py to update XCode developer metadata. After this step, open
tvmrpc.xcodeproj by using XCode, build the App and install the App on the phone. Usually, we
do not use the iOS App directly.
Due to security restriction of iOS10. We cannot upload dynamic libraries to the App and load it from sandbox.
Instead, we need to build a list of libraries, pack them into the app bundle, launch the RPC server and
connect to test the bundled libraries. We use
xcodebuild test to automate this process.
The test script tests/ios_rpc_test.py is a good template for the workflow. With this script, we don't need to manually operate the iOS App, this script will build the app, run it and collect the results automatically.
To run the script, you need to configure the following environment variables
TVM_IOS_CODESIGNThe signature you use to codesign the app and libraries (e.g.
iPhone Developer: Name (XXXX))
TVM_IOS_RPC_ROOTThe root directory of the iOS rpc project
TVM_IOS_RPC_PROXY_HOSTThe RPC proxy address
TVM_IOS_RPC_DESTINATIONThe Xcode target device(e.g.
How it works
Let us explain how it works, the project look for
rpc_config.txt file in the project root folder.
rpc_config.txt file should be in the following format:
<url> <port> <key> [path to dylib1] [path to dylib2] ...
The build script will copy all the dynamic libraries into bundle
which you will be able to load via RPC using
It will also create an
tvmrpc.app/Frameworks/tvm/rpc_config.txt contaiing the first line.
When we run the testcase, the testcase read the configuration from
and connect to the specified RPC proxy, start serving loop.
So if we want to start the RPC from XCode IDE, simply manually modify
rpc_config.txt file and click test.
Then connect to the proxy via the python script.
We can also use the RPC App directly, by typing in the address and press connect to connect to the proxy. However, the restriction is we can only load the modules that are bundled to the App.