[Bug] Enable USE_DNNL cause Sphix crash when processing from_oneflow.py and from_paddle.py for documents

[huajsj]

Expected behavior

What you were expecting
Set USE_DNNL ON or OFF should not impact document processing

Actual behavior

What actually happened

Set USE_DNNL ON then run "docker/bash.sh --env CI --env TVM_SHARD_INDEX --env TVM_NUM_SHARDS --env RUN_DISPLAY_URL --env PLATFORM tlcpack/ci-gpu:20220630-060117-558ba99c7 ./tests/scripts/task_python_docs.sh"
will see the crash happen in procesing from_oneflow.py and from_paddle.py.

Environment

Any environment details, such as: Operating System, TVM version, etc
tlcpack/ci-gpu:20220630
tlcpack/ci-gpu:20220619

Steps to reproduce

Preferably a minimal script to cause the issue to occur.

mkdir ./build
cp ./cmake/config.cmake ./build/
echo set(USE_DNNL ON) >> ./build/config.cmake
docker/bash.sh -it --env CI --env TVM_SHARD_INDEX --env TVM_NUM_SHARDS --env RUN_DISPLAY_URL --env PLATFORM tlcpack/ci-gpu:20220630-060117-558ba99c7
cd build
cmake ../
make
cd ../
../tests/scripts/task_python_docs.sh"

Debug information

docker/bash.sh -it --env CI --env TVM_SHARD_INDEX --env TVM_NUM_SHARDS --env RUN_DISPLAY_URL --env PLATFORM tlcpack/ci-gpu:20220630-060117-558ba99c7
cd _staging
gdb python3
set args -m sphinx -b html -d /workspace/docs/_build/doctrees   . /workspace/docs/_build/html
r

can saw the crash happen in 'dlopen' for "from_oneflow.py "
after set USE_DNNL OFF , and rebuild issue go away

[huajsj]

@driazati

[areusch]

@huajsj just curious why you needed USE_DNNL ON in your tutorial? is that closer to the use case for pipeline executor, or is it possible to demonstrate pipeline executor with just two llvm graphs?

[huajsj]

@areusch, thanks for the follow up, yes BYOC should be the use case for pipeline executor which target to bring different backend/hardware together to do a heterogenous parallel execution and get the performance improvement.

besides of dnnl, cutlass is another option of BYOC backend, I am trying to see if i can bring up a cutlass example, if that still not work,definitely I will go to the two LLVM tutorial.

[huajsj]

After using CUTLASS+BYOC in PR 11557, the crash issue gone, now this issue not the blocker of PR11557 anymore.

[billishyahao]

Hi @huajsj , Do you observe the failure before merging the pr #11638 ? Shall we rule out this one?

[areusch]

@huajsj are you able to look at the question above?

[huajsj]

@areusch @billishyahao , thanks for the follow up, I tried before PR #11638 , but still saw
the issue.