libmklml_intel.so not found

[mas-dse-greina]

I just built neon on a CentOS 7 (3.10.0-693.11.6.el7.x86_64) within a conda (Python 2.7) environment. The build appeared to be successful, but when I try to run the mnist_mlp.py example, I get:

(neon) [bduser@node15 examples]$ python mnist_mlp.py
Traceback (most recent call last):
File "mnist_mlp.py", line 59, in
args = parser.parse_args()
File "/home/bduser/miniconda2/envs/neon/lib/python2.7/site-packages/nervananeon-2.6.0-py2.7.egg/neon/util/argparser.py", line 366, in parse_args
compat_mode=args.compat_mode)
File "/home/bduser/miniconda2/envs/neon/lib/python2.7/site-packages/nervananeon-2.6.0-py2.7.egg/neon/backends/init.py", line 113, in gen_backend
deterministic=deterministic)
File "/home/bduser/miniconda2/envs/neon/lib/python2.7/site-packages/nervananeon-2.6.0-py2.7.egg/neon/backends/backend.py", line 468, in allocate_backend
return Backend.backendsname
File "/home/bduser/miniconda2/envs/neon/lib/python2.7/site-packages/nervananeon-2.6.0-py2.7.egg/neon/backends/nervanamkl.py", line 213, in init
self.mklEngine = ctypes.cdll.LoadLibrary(mkl_engine_path)
File "/home/bduser/miniconda2/envs/neon/lib/python2.7/ctypes/init.py", line 444, in LoadLibrary
return self._dlltype(name)
File "/home/bduser/miniconda2/envs/neon/lib/python2.7/ctypes/init.py", line 366, in init
self._handle = _dlopen(self._name, mode)
OSError: libmklml_gnu.so: cannot open shared object file: No such file or directory

I found this online and am trying the suggestion at the end to rebuild mkl-dnn from source (tensorflow/tensorflow#13711).

[mas-dse-greina]

It looks like this works:

git clone https://github.com/01org/mkl-dnn.git
cd mkl-dnn/scripts && ./prepare_mkl.sh && cd ..
mkdir -p build && cd build && cmake .. && make
sudo make install

echo 'export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib' >> ~/.bashrc

Maybe the .tar.gz file that is being included with neon needs to be updated??

[baojun-nervana]

@mas-dse-greina It is good you can fix the issue by setting the library path.
Sometimes it may need to clean up before built. You may run

make clean => this will clean up all the mkl artifacts
make install => it will download mkl and do a fresh install.

[wei-v-wang]

Thanks for reporting. Looks like there is a URL change for the tar.gz.
Your approach using latest mkl-dnn (open-source) was able to avoid calling buggy URL.

[wei-v-wang]

We'll fix our code on the URL

[mas-dse-greina]

Thanks!

…

-Tony

On Fri, Jan 26, 2018 at 2:54 PM, Wei Wang ***@***.***> wrote: We'll fix our code on the URL — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#438 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AVReEkyDX2-endS1m3gqreZiMG2B1IO7ks5tOledgaJpZM4RqlHx> .

[wei-v-wang]

Reopen till URL is changed. Sorry for the confusion...

[wei-v-wang]

f43cfa2 closes this issue. Thanks again for reporting!