How to run OpenMP on Linux?

本文提供了一个使用 GCC 编译器的 OpenMP 示例程序。通过设置环境变量 OMP_NUM_THREADS 来指定并行线程数量,演示了如何在 Bash Shell 下运行带有 OpenMP 并行特性的 C 程序。

gcc -fopenmp foo.c

For Bash Shell:

export OMP_NUM_THREADS=4

./a.out

PS D:\python\KBQA-on-Bert-master\KBQA-on-Bert-master> & C:/D/Anaconda3_envs/envs/kbqa/python.exe d:/python/KBQA-on-Bert-master/KBQA-on-Bert-master/run_ner.py C:\D\Anaconda3_envs\envs\kbqa\lib\site-packages\numpy\__init__.py:138: UserWarning: mkl-service package failed to import, therefore Intel(R) MKL initialization ensuring its correct out-of-the box operation under condition when Gnu OpenMP had already been loaded by Python process is not assured. Please install mkl-service package, see http://github.com/IntelPython/mkl-service from . import _distributor_init Traceback (most recent call last): File "C:\D\Anaconda3_envs\envs\kbqa\lib\site-packages\numpy\core\__init__.py", line 22, in <module> from . import multiarray File "C:\D\Anaconda3_envs\envs\kbqa\lib\site-packages\numpy\core\multiarray.py", line 12, in <module> from . import overrides File "C:\D\Anaconda3_envs\envs\kbqa\lib\site-packages\numpy\core\overrides.py", line 7, in <module> from numpy.core._multiarray_umath import ( ImportError: DLL load failed: 找不到指定的模块。 During handling of the above exception, another exception occurred: Traceback (most recent call last): File "d:/python/KBQA-on-Bert-master/KBQA-on-Bert-master/run_ner.py", line 19, in <module> import tensorflow as tf File "C:\D\Anaconda3_envs\envs\kbqa\lib\site-packages\tensorflow\__init__.py", line 24, in <module> from tensorflow.python import pywrap_tensorflow # pylint: disable=unused-import File "C:\D\Anaconda3_envs\envs\kbqa\lib\site-packages\tensorflow\python\__init__.py", line 47, in <module> import numpy as np File "C:\D\Anaconda3_envs\envs\kbqa\lib\site-packages\numpy\__init__.py", line 140, in <module> from . import core File "C:\D\Anaconda3_envs\envs\kbqa\lib\site-packages\numpy\core\__init__.py", line 48, in <module> raise ImportError(msg) ImportError: IMPORTANT: PLEASE READ THIS FOR ADVICE ON HOW TO SOLVE THIS ISSUE! Importing the numpy C-extensions failed. This error can happen for many reasons, often due to issues with your setup or how NumPy was installed. We have compiled some common reasons and troubleshooting tips at: https://numpy.org/devdocs/user/troubleshooting-importerror.html Please note and check the following: * The Python version is: Python3.7 from "C:\D\Anaconda3_envs\envs\kbqa\python.exe" * The NumPy version is: "1.19.2" and make sure that they are the versions you expect. Please carefully study the documentation linked above for further help. Original error was: DLL load failed: 找不到指定的模块。
07-19
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