Issue at compilation time

[lmontigny]

The libpapi.a seems to be missing, I attached my commands:

python pypapi/papi_build.py generating ./pypapi/_papi.c the current directory is '/home/lmontigny/Software/pypapi' running build_ext building 'pypapi._papi' extension gcc -pthread -B /home/lmontigny/anaconda3/envs/graphwave_env_clean/compiler_compat -Wl,--sysroot=/ -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/home/lmontigny/Software/pypapi/pypapi -I/home/lmontigny/anaconda3/envs/graphwave_env_clean/include/python2.7 -c pypapi/_papi.c -o ./pypapi/_papi.o gcc -pthread -shared -B /home/lmontigny/anaconda3/envs/graphwave_env_clean/compiler_compat -L/home/lmontigny/anaconda3/envs/graphwave_env_clean/lib -Wl,-rpath=/home/lmontigny/anaconda3/envs/graphwave_env_clean/lib -Wl,--no-as-needed -Wl,--sysroot=/ ./pypapi/_papi.o /home/lmontigny/Software/pypapi/pypapi/../papi/src/libpapi.a -L/home/lmontigny/anaconda3/envs/graphwave_env_clean/lib -lpython2.7 -o ./pypapi/_papi.so gcc: error: /home/lmontigny/Software/pypapi/pypapi/../papi/src/libpapi.a: No such file or directory

[flozz]

Hello,

• If you just want to install PyPAPI, see this page: https://flozz.github.io/pypapi/install.html
• If you want to work on PyPAPI itself, you fisrt have to build the PAPI C library before building PyPAPI. I updated instructions in the README: https://github.com/flozz/pypapi#building-pypapi-for-local-development

:)

[lmontigny]

Thank you!

Is it supposed to work for Python 2.*? /home/lmontigny/Software/pypapi/papi/src/papi.c:1026: undefined reference to __intel_sse2_strncmp' ../libpapi.a(papi.o): In functionPAPI_read': /home/lmontigny/Software/pypapi/papi/src/papi.c:2596: undefined reference to `_intel_fast_memcpy'

I was able to compile with Python 3.* without trouble. (my script is in Python 2 unfortunately...)

Note that you need to install cffi, I did with pip.

[flozz]

It should work with Python 2.7

what is your linux distribution?

[lmontigny]

I am using CentOS 7, inside Conda environment

[flozz]

I made an update to allow passing flags to the compiler using environment variable.

Please pull the last commit from this repository:

git pull

Then can you try the following:

cd papi/src
make clean
cd -
export CFLAGS=-msse2
python setup.py build
python pypapi/papi_build.py

If this does not work, can you provide the output of the following command:

gcc -Q --help=target -march=native

[lmontigny]

Alright, I tried but I had the same issue.

If it helps, I am using: conda create -n papi_compiled -c intel python=2.7 pip -y

gcc output: gcc.txt

gcc (GCC) 7.2.0 icc (ICC) 18.0.2 20180210 on Xeon Skylake SP 8180

I tried with CFLAGS=-march=core-avx2 and others without success. Note that this variable is passed to gcc and icc.

[flozz]

Hello,

I thenk the problem is caused because papapi is built using a compiller (maybe icc?) and the python extension with an other one (probalbly gcc). Can you try this?

export CC=gcc
cd papi/src
make clean
cd -
python setup.py build
python pypapi/papi_build.py

[lmontigny]

Hi, Alright, I was able to compile it!

Unfortunately at running time, I got

from pypapi import papi_high
  File "/home/lmontigny/anaconda3/envs/papi_compiled_1/lib/python2.7/site-packages/python_papi-5.5.1.3-py2.7-linux-x86_64.egg/pypapi/__init__.py", line 1, in <module>
    from . import papi_high
  File "/home/lmontigny/anaconda3/envs/papi_compiled_1/lib/python2.7/site-packages/python_papi-5.5.1.3-py2.7-linux-x86_64.egg/pypapi/papi_high.py", line 48, in <module>
    from ._papi import lib, ffi
ImportError: /home/lmontigny/anaconda3/envs/papi_compiled_1/lib/python2.7/site-packages/python_papi-5.5.1.3-py2.7-linux-x86_64.egg/pypapi/_papi.so: undefined symbol: __intel_sse2_strcpy

I tried different CXX flags, I couldn't find a workaround... It seems that the compiler was not aware of the SIMD extension, it could be that Python itself was compiled with a old gcc.

[flozz]

Is both Python and PyPAPI compiled with the same compiler? Maybe you will have to recompile Python with the same compiler than the one used for PyPAPI.

[lmontigny]

I am using Python directly from conda. It will try to compile my own. Thanks!

[flozz]

Hello,

I close this issue, please re-open it if you still have questions :)