Cannot run MNN with OpenCL backend

[chunseoklee]

devices : odroid-xu4
os : ubuntu mate 16.04

I try to run mobilenet model using MNN with OpenCL backend.

I have compiled MNN with the following cmake setting on odroid natively.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3aeb607..3f59447 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,7 +20,7 @@ else()
 endif()
 
 # build options
-option(MNN_BUILD_HARD "Build -mfloat-abi=hard or not" OFF)
+option(MNN_BUILD_HARD "Build -mfloat-abi=hard or not" ON)
 option(MNN_BUILD_SHARED_LIBS "MNN build shared or static lib" ON)
 option(MNN_FORBID_MULTI_THREAD "Disable Multi Thread" OFF)
 option(MNN_OPENMP "Enable Multiple Thread Linux|Android" ON)
@@ -54,7 +54,7 @@ endif()
 
 # backend options
 option(MNN_METAL "Enable Metal" OFF)
-option(MNN_OPENCL "Enable OpenCL" OFF)
+option(MNN_OPENCL "Enable OpenCL" ON)
 option(MNN_OPENGL "Enable OpenGL" OFF)
 option(MNN_VULKAN "Enable Vulkan" OFF)
 option(MNN_ARM82 "Enable ARM82" OFF)

But running with OpenCL backend always fail.

root@odroid /h/t/M/build# ./MNNV2Basic.out ./mobilenet.mnn 1 0 3
Use extra forward type: 3

Open Model ./mobilenet.mnn
Can't Find type=3 backend, use 3 instead
Create Backend Failed because no creator for 3
Invalide Session!!
test_main, 170, cost time: 1.346000 ms

Please help.

[jxt1234]

Two way to solve:

1. Install opencl driver, Disable MNN_USE_OPENCL_WRAPPER

2. Find your opencl's so , add the path to
   source/backend/opencl/core/runtime/OpenCLWrapper.cpp

[liushuan]

使用 方法 2 不能解决问题呢？ 我也遇到了同样的问题，平台是RK3399

[liushuan]

目前可以通过在程序里面添加这个解决该问题。
#inlcude<dlfcn.h>

auto handle = dlopen("libMNN_CL.so", RTLD_NOW);
FUNC_PRINT_ALL(handle, p);

[PhilipXue]

@liushuan 你好，请问能详细讲下你的解决方法吗？这段代码需要添加到哪里？（我在benchmark.cpp中添加后编译不过）

/MNN/include/MNNDefine.h:27:38: error: expected constructor, destructor, or type conversion before ‘(’ token
 #define MNN_PRINT(format, ...) printf(format, ##__VA_ARGS__)

[liushuan]

@PhilipXue 你好，我是直接添加到了main() 方法的开始位置。

[chunseoklee]

@jxt1234 reopened since I still have issues.

Install opencl driver, Disable MNN_USE_OPENCL_WRAPPER

MNN_USE_OPENCL_WRAPPER is enabled on android build. I built MNN on linux.

Find your opencl's so , add the path to
source/backend/opencl/core/runtime/OpenCLWrapper.cpp

Applied, But did not make any change.

AFAIK, To enable opencl backend, the function below should be executed :

static const auto __opencl_global_initializer = []() {
    MNNInsertExtraBackendCreator(MNN_FORWARD_OPENCL, new CLBackendCreator, true);
    return true;
}();

When I run MNN with gdb, I found that the function not called.

[jxt1234]

Currently on linux the code will not be automatic executed. Please dlopen the libMNN_CL.so in your main code, and link -dl , like this:
#inlcude<dlfcn.h>
int main() {
auto handle = dlopen("libMNN_CL.so", RTLD_NOW);

/Run MNN/
}

[chunseoklee]

@jxt1234 Thanks for help

[xuguozhi]

solved!

[Echosanmao]

我在用.tflite生成.mnn时报错，check failed:creator not_supported_op[MUL]
这个问题大家有遇到过吗?
求教!!!