As you advised, I guess our environment have X11-related issue.
In fact, I tried to build TVM on google colab, but it failed to export OpenGL kernel code as this notebook.
---------------------------------------------------------------------------
TVMError Traceback (most recent call last)
<ipython-input-1-c718136d5a9e> in <module>()
15 context = tvm.gpu(0)
16
---> 17 graph, lib, params = relay.build(func, target=target)
18 print(lib.imported_modules[0].get_source(fmt="gl"))
5 frames
/usr/local/lib/python3.6/dist-packages/tvm-0.6.dev0-py3.6-linux-x86_64.egg/tvm/_ffi/_cython/base.pxi in tvm._ffi._cy3.core.CALL()
TVMError: Traceback (most recent call last):
[bt] (8) /usr/local/lib/python3.6/dist-packages/tvm-0.6.dev0-py3.6-linux-x86_64.egg/tvm/libtvm.so(tvm::codegen::BuildOpenGL(tvm::Array<tvm::LoweredFunc, void>)+0x1c3) [0x7ff209188703]
[bt] (7) /usr/local/lib/python3.6/dist-packages/tvm-0.6.dev0-py3.6-linux-x86_64.egg/tvm/libtvm.so(tvm::runtime::OpenGLModuleCreate(std::unordered_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, tvm::runtime::OpenGLShader, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, tvm::runtime::OpenGLShader> > >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unordered_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, tvm::runtime::FunctionInfo, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, tvm::runtime::FunctionInfo> > >)+0xeb) [0x7ff20981d99b]
[bt] (6) /usr/local/lib/python3.6/dist-packages/tvm-0.6.dev0-py3.6-linux-x86_64.egg/tvm/libtvm.so(tvm::runtime::OpenGLModuleNode::OpenGLModuleNode(std::unordered_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, tvm::runtime::OpenGLShader, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, tvm::runtime::OpenGLShader> > >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unordered_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, tvm::runtime::FunctionInfo, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, tvm::runtime::FunctionInfo> > >)+0x92) [0x7ff20981d372]
[bt] (5) /usr/local/lib/python3.6/dist-packages/tvm-0.6.dev0-py3.6-linux-x86_64.egg/tvm/libtvm.so(tvm::runtime::gl::OpenGLWorkspace::Global()+0x55) [0x7ff209815a75]
[bt] (4) /usr/local/lib/python3.6/dist-packages/tvm-0.6.dev0-py3.6-linux-x86_64.egg/tvm/libtvm.so(tvm::runtime::gl::OpenGLWorkspace::OpenGLWorkspace()+0x4d) [0x7ff209812d1d]
[bt] (3) /usr/lib/x86_64-linux-gnu/libglfw.so.3(glfwInit+0x2d) [0x7ff20262bb3d]
[bt] (2) /usr/lib/x86_64-linux-gnu/libglfw.so.3(+0xbdc5) [0x7ff202631dc5]
[bt] (1) /usr/lib/x86_64-linux-gnu/libglfw.so.3(+0x59f7) [0x7ff20262b9f7]
[bt] (0) /usr/local/lib/python3.6/dist-packages/tvm-0.6.dev0-py3.6-linux-x86_64.egg/tvm/libtvm.so(tvm::runtime::gl::GlfwErrorCallback(int, char const*)+0x2f9) [0x7ff20980d969]
File "/tvm/src/runtime/opengl/opengl_device_api.cc", line 82
Error: [65544] X11: The DISPLAY environment variable is missing
On the other hand, it succeeded to do same thing with FCRC version even on non-GPU colab runtime.
So I guess my build method is also wrong.
I will check https://github.com/uwsampl/tvm as @jroesch advised.
Thanks.