{"id":578,"date":"2019-09-03T16:19:10","date_gmt":"2019-09-03T07:19:10","guid":{"rendered":"http:\/\/hirlab.net\/nblog\/?p=578"},"modified":"2020-05-01T13:24:47","modified_gmt":"2020-05-01T04:24:47","slug":"%e3%80%90c%e3%80%91openmp%e3%81%a7%e4%b8%a6%e5%88%97%e5%87%a6%e7%90%86%e3%82%92%e3%82%84%e3%81%a3%e3%81%a6%e3%81%bf%e3%82%8b%e3%80%90macos-mojave-10-14%e3%80%91","status":"publish","type":"post","link":"https:\/\/hirlab.net\/nblog\/category\/programming\/art_578\/","title":{"rendered":"\u00a0\u3010C++\u3011OpenMP\u3067\u4e26\u5217\u51e6\u7406\u3092\u3084\u3063\u3066\u307f\u308b\u3010macOS Mojave 10.14\u3011"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_11 counter-hierarchy counter-decimal ez-toc-light-blue\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">\u30b3\u30f3\u30c6\u30f3\u30c4<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<nav><ul class=\"ez-toc-list ez-toc-list-level-1\"><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_578\/#OpenMP\" title=\"OpenMP\">OpenMP<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_578\/#%E4%B8%8B%E6%BA%96%E5%82%99\" title=\"\u4e0b\u6e96\u5099\">\u4e0b\u6e96\u5099<\/a><ul class=\"ez-toc-list-level-3\"><li class=\"ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_578\/#Operation_not_permitted\" title=\"Operation not permitted\">Operation not permitted<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_578\/#CLion%E3%81%AA%E3%81%A9%E3%81%AEIDE%E3%82%92%E7%94%A8%E3%81%84%E3%82%8B%E5%A0%B4%E5%90%88\" title=\"CLion\u306a\u3069\u306eIDE\u3092\u7528\u3044\u308b\u5834\u5408\">CLion\u306a\u3069\u306eIDE\u3092\u7528\u3044\u308b\u5834\u5408<\/a><\/li><\/ul><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_578\/#CMakeLists_txt%E3%81%AB%E6%9B%B8%E3%81%8F%E3%81%93%E3%81%A8\" title=\"CMakeLists.txt\u306b\u66f8\u304f\u3053\u3068\">CMakeLists.txt\u306b\u66f8\u304f\u3053\u3068<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_578\/#OpenMP%E3%82%92%E4%BD%BF%E3%81%A3%E3%81%A6%E3%81%BF%E3%82%8B\" title=\"OpenMP\u3092\u4f7f\u3063\u3066\u307f\u308b\">OpenMP\u3092\u4f7f\u3063\u3066\u307f\u308b<\/a><ul class=\"ez-toc-list-level-3\"><li class=\"ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_578\/#%E3%82%AF%E3%83%AA%E3%83%86%E3%82%A3%E3%82%AB%E3%83%AB%E3%82%BB%E3%82%AF%E3%82%B7%E3%83%A7%E3%83%B3%E3%81%AE%E6%8C%87%E5%AE%9A\" title=\"\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u30bb\u30af\u30b7\u30e7\u30f3\u306e\u6307\u5b9a\">\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u30bb\u30af\u30b7\u30e7\u30f3\u306e\u6307\u5b9a<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_578\/#reduction\" title=\"reduction\">reduction<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_578\/#%E3%82%A4%E3%83%86%E3%83%AC%E3%83%BC%E3%82%B7%E3%83%A7%E3%83%B3%E3%83%AB%E3%83%BC%E3%83%97%E3%81%AF%E4%BD%BF%E3%81%88%E3%81%AA%E3%81%84\" title=\"\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30d7\u306f\u4f7f\u3048\u306a\u3044\">\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30d7\u306f\u4f7f\u3048\u306a\u3044<\/a><\/li><\/ul><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/hirlab.net\/nblog\/category\/programming\/art_578\/#%E3%81%8A%E3%82%8F%E3%82%8A%E3%81%AB\" title=\"\u304a\u308f\u308a\u306b\">\u304a\u308f\u308a\u306b<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"OpenMP\"><\/span>OpenMP<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>OpenMP\u306fC\/C++\u7528\u306e\u4e26\u5217\u8a08\u7b97\u3092\u7c21\u5358\u306b\u5b9f\u88c5\u3067\u304d\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\uff0e<\/p>\n<p>\u6709\u540d\u3089\u3057\u3044\u3051\u3069\uff0c\u4eca\u56de\u521d\u3081\u3066\u4f7f\u7528\u3057\u3066\u307f\u305f\u306e\u3067\u305d\u306e\u5099\u5fd8\u9332\u3068\u3057\u3066\u8272\u3005\u307e\u3068\u3081\u307e\u3059\uff0e<\/p>\n<p>\u3061\u306a\u307f\u306b\u30bf\u30a4\u30c8\u30eb\u306e\u901a\u308a\uff0c<strong><mark>macOS Mojave 10.14.6<\/mark><\/strong>\u3067\u306e\u5b9f\u88c5\uff0e<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E4%B8%8B%E6%BA%96%E5%82%99\"><\/span>\u4e0b\u6e96\u5099<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u307e\u305aMacOS\u3067OpenMP\u3092\u5229\u7528\u3059\u308b\u306b\u306f\uff0cClang\u3067\u306f\u306a\u304fgcc\/g++\u306b\u30b3\u30f3\u30d1\u30a4\u30e9\u3092\u5207\u308a\u66ff\u3048\u308b\u5fc5\u8981\u304c\u3042\u308b\u3088\u3046\u3060\uff0e<\/p>\n<p>\u65e9\u901f\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3092\u884c\u3046\uff0e<\/p>\n<pre class=\"lang:sh decode:true \">$ brew install gcc<\/pre>\n<p>\u3053\u3053\u3067\u3059\u3067\u306b\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u6e08\u307f\u3067\u3042\u308c\u3070\u305b\u3063\u304b\u304f\u306a\u306e\u3067\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3082\u3057\u3066\u304a\u304f\u3068\u826f\u3044\u3067\u3057\u3087\u3046\uff0e<\/p>\n<p>\u305d\u3046\u3057\u305f\u3089\u5207\u308a\u66ff\u3048\u308b\u308f\u3051\u3060\u304c\uff0c\u307e\u305agcc\u306e\u5834\u6240\u3092\u78ba\u8a8d\u3059\u308b\uff0e<\/p>\n<pre class=\"lang:sh decode:true \">$ which gcc<\/pre>\n<p>\u305d\u306e\u3042\u3068\uff0c\u5148\u307b\u3069\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u305fgcc\u3068g++\u306f\uff0c\u304a\u305d\u3089\u304f\u300c\/usr\/local\/bin\/\u300d\u306b\u3042\u308b\u30cf\u30ba\uff0e<\/p>\n<p>\u4e00\u5fdc\u78ba\u8a8d\u3059\u308b\uff0e<\/p>\n<pre class=\"lang:sh decode:true \">$ ls \/usr\/local\/bin | grep gcc<\/pre>\n<p>\u305d\u3046\u3057\u305f\u3089\uff0c\u5148\u307b\u3069\u306egcc\u306e\u5834\u6240\u306b\u5bfe\u3057\u3066\uff0c\u65b0\u3057\u3044gcc\u3092ld\u30b3\u30de\u30f3\u30c9\u3092\u7528\u3044\u3066\u30ea\u30ed\u30b1\u30fc\u30c8\u3059\u308b\uff0e<\/p>\n<p>\u3082\u3057\uff0cgcc\u306e\u5834\u6240\u304c\u300c\/usr\/bin\/\u300d\u3067\u3042\u308c\u3070\uff0c<\/p>\n<pre class=\"lang:sh decode:true \">$ sudo ln -sf \/usr\/local\/bin\/gcc-9 \/usr\/bin\/gcc\r\n$ sudo ln -sf \/usr\/local\/bin\/g++-9 \/usr\/bin\/g++<\/pre>\n<p>\u306e\u3088\u3046\u306b\u3059\u308b\uff0e(\u3053\u306e\u3068\u304d <mark>gcc-9<\/mark> \u3068 <mark>g++-9<\/mark> \u306f\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u3063\u3066\u7570\u306a\u308b)<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Operation_not_permitted\"><\/span>Operation not permitted<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>MacOS\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u3063\u3066\u306f\u3053\u3044\u3064\u304c\u51fa\u3066\u304f\u308b\uff0e<\/p>\n<p>\u5b9f\u969b\u306b\u50d5\u3082\u906d\u9047\u3057\u307e\u3057\u305f\uff0e<\/p>\n<p>\u305d\u3046\u3044\u3046\u4eba\u306f\u4ee5\u4e0b\u306e\u30da\u30fc\u30b8\u3092\u53c2\u8003\u306b\u3057\u3066SIP(System Integrity Protection)\u3092\u7121\u52b9\u306b\u3057\u3066\u8a66\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff0e<\/p>\n<p>&nbsp;<\/p>\n<p>\u53c2\u8003\uff1a<a href=\"https:\/\/berukann.hatenablog.jp\/entry\/2015\/12\/30\/123020\">EI Capitan\u3067sudo\u4ed8\u3051\u3066\u3044\u308bOperation not permitted\u304c\u51fa\u305f\u6642\u306e\u5bfe\u51e6\u6cd5<\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"CLion%E3%81%AA%E3%81%A9%E3%81%AEIDE%E3%82%92%E7%94%A8%E3%81%84%E3%82%8B%E5%A0%B4%E5%90%88\"><\/span>CLion\u306a\u3069\u306eIDE\u3092\u7528\u3044\u308b\u5834\u5408<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u3082\u3057\u304b\u3057\u305f\u3089IDE\u306e\u53c2\u7167\u3057\u3066\u3044\u308b\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u307e\u3060\u904e\u53bb\u306e\u3082\u306e\u304b\u3082\u3057\u308c\u306a\u3044\uff0e<\/p>\n<p>CLion\u3067\u3042\u308c\u3070\u4ee5\u4e0b\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\uff0e<\/p>\n<p>&nbsp;<\/p>\n<p>\u53c2\u8003\uff1a<a href=\"https:\/\/pleiades.io\/help\/clion\/how-to-switch-compilers-in-clion.html\">\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u5207\u308a\u66ff\u3048 - \u30d8\u30eb\u30d7 | CLion<\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"CMakeLists_txt%E3%81%AB%E6%9B%B8%E3%81%8F%E3%81%93%E3%81%A8\"><\/span>CMakeLists.txt\u306b\u66f8\u304f\u3053\u3068<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u3082\u3057CMake\u3092\u4f7f\u3046\u4eba\u306f\u53c2\u8003\u307e\u3067\u306b\uff0e<\/p>\n<p>\u306a\u304a\uff0c\u3053\u306e\u3042\u3068\u306e\u5b9f\u88c5\u306fCMake\u3092\u7528\u3044\u3066\u3044\u308b\uff0e<\/p>\n<p>CMakeLists.txt\u306b\u306f\u6700\u4f4e\u3067\u3082\u4ee5\u4e0b\u306e\u8a18\u8ff0\u304c\u8ffd\u52a0\u3067\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\uff0e<\/p>\n<pre class=\"lang:c decode:true\">find_package(OpenMP REQUIRED)\r\n\r\nset(CMAKE_C_FLAGS \"\\${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}\")\r\nset(CMAKE_CXX_FLAGS \"\\${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}\")<\/pre>\n<p>\u4ee5\u4e0b\u306fCMakeLists.txt\u5168\u4f53\u306e\u4e00\u4f8b\uff0e(\u672c\u8a18\u4e8b\u306eCMakeLists.txt)<\/p>\n<pre class=\"lang:c decode:true\">cmake_minimum_required(VERSION 3.14)  # make \u63a8\u5968\u306e\u6700\u4f4e\u30d0\u30fc\u30b8\u30e7\u30f3\r\nproject(omp_test)  #project\u540d \r\n\r\nset(CMAKE_CXX_STANDARD 14)  # c++14\r\n\r\nfind_package(OpenMP REQUIRED)\r\n\r\nset(CMAKE_C_FLAGS \"\\${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}\")\r\nset(CMAKE_CXX_FLAGS \"\\${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}\")\r\n\r\nadd_executable(omp_test main.cpp)<\/pre>\n<p>\u3061\u306a\u307f\u306b\u666e\u901a\u306b\u30bf\u30fc\u30df\u30ca\u30eb\u304b\u3089\u30b3\u30f3\u30d1\u30eb\u3059\u308b\u3068\u304d\u306f\uff0c<strong><mark>-fopenmp<\/mark><\/strong>\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u3064\u3051\u308b\uff0e<\/p>\n<h2><span class=\"ez-toc-section\" id=\"OpenMP%E3%82%92%E4%BD%BF%E3%81%A3%E3%81%A6%E3%81%BF%E3%82%8B\"><\/span>OpenMP\u3092\u4f7f\u3063\u3066\u307f\u308b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u4e0b\u6e96\u5099\u304c\u7d42\u308f\u3063\u305f\u306e\u3067\u672c\u984c\u306b\u5165\u308a\u307e\u3059\uff0e(\u7d50\u69cb\u4e0b\u6e96\u5099\u306b\u6642\u9593\u304c\u304b\u304b\u3063\u305f\u306a\u3093\u3066\u8a00\u3048\u306a\u3044)<\/p>\n<p>\u307e\u305a\u306f\u8d85\u30b7\u30f3\u30d7\u30eb\u306a\u30b3\u30fc\u30c9\u304b\u3089\uff0e<\/p>\n<pre class=\"lang:c++ decode:true \">#include &lt;iostream&gt;\r\n#include &lt;omp.h&gt;\r\n\r\nusing namespace std;\r\n\r\nint main() {\r\n    int threads_num = omp_get_max_threads();\r\n    cout &lt;&lt; \"All Threads num: \" &lt;&lt; threads_num &lt;&lt; endl;\r\n\r\n    #pragma omp parallel for\r\n    for( int i = 0; i &lt; 10; ++i ){\r\n        \/\/ \u4e26\u5217\u3059\u308b\u51e6\u7406\r\n        \r\n        cout &lt;&lt; \"Thread No. \" &lt;&lt; omp_get_thread_num() &lt;&lt; endl;\r\n    }\r\n\r\n    return 0;\r\n}<\/pre>\n<p>\u306a\u306b\u3082\u3057\u306a\u3044\u30d7\u30ed\u30b0\u30e9\u30e0\u3060\u304c\uff0c\u307e\u3042OpenMP\u306e\u52d5\u4f5c\u78ba\u8a8d\u3068\u3057\u3066\u306f\u5341\u5206\uff0e<\/p>\n<pre class=\"lang:c++ decode:true \">All Threads num: 8\r\nThread No. Thread No. 5\r\nThread No. Thread No. Thread No. Thread No. 3\r\n6\r\n4\r\n7\r\n2Thread No. \r\nThread No. 1\r\n0\r\nThread No. 0\r\nThread No. 1<\/pre>\n<p>\u5165\u308a\u4e71\u308c\u3066\u3044\u308b\uff0e\u7b11<\/p>\n<p>\u304a\u305d\u3089\u304f\uff0c\u3042\u308b\u30b9\u30ec\u30c3\u30c9\u304c\u6a19\u6e96\u51fa\u529b\u51e6\u7406\u3092\u3057\u3066\u3044\u308b\u3068\u304d\u306b\uff0c\u6539\u884c(<span class=\"lang:c++ decode:true crayon-inline \">endl<\/span>\u00a0)\u3059\u308b\u524d\u306b\u4ed6\u306e\u30b9\u30ec\u30c3\u30c9\u306e\u540c\u3058\u51e6\u7406\u304c\u88ab\u3063\u3066\u3057\u307e\u3063\u305f\u3060\u3051\u3060\u3068\u601d\u3046\uff0e<\/p>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<ins class=\"adsbygoogle\"\n     style=\"display:block; text-align:center;\"\n     data-ad-layout=\"in-article\"\n     data-ad-format=\"fluid\"\n     data-ad-client=\"ca-pub-7123758399787647\"\n     data-ad-slot=\"1665651601\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E3%82%AF%E3%83%AA%E3%83%86%E3%82%A3%E3%82%AB%E3%83%AB%E3%82%BB%E3%82%AF%E3%82%B7%E3%83%A7%E3%83%B3%E3%81%AE%E6%8C%87%E5%AE%9A\"><\/span>\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u30bb\u30af\u30b7\u30e7\u30f3\u306e\u6307\u5b9a<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u30bb\u30af\u30b7\u30e7\u30f3\u3068\u306f\uff0c\u3042\u308b\u51e6\u7406\u3092\u4e26\u5217\u51e6\u7406\u3057\u3066\u3044\u308b\u3068\u304d\u306b\uff0c\u540c\u6642\u306b\u5b9f\u884c\u3057\u306a\u3044\u9818\u57df\u3092\u6307\u3059\uff0e<\/p>\n<p>OpenMP\u3067\u3082\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u3088\u3046\u3067\u3059\uff0e<\/p>\n<p>\u5148\u307b\u3069\u306e\u30b3\u30fc\u30c9\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u52a0\u7b46\u3057\u307e\u3057\u305f\uff0e<\/p>\n<pre class=\"lang:c++ mark:13 decode:true \">#include &lt;iostream&gt;\r\n#include &lt;omp.h&gt;\r\n\r\nusing namespace std;\r\n\r\nint main() {\r\n    int threads_num = omp_get_max_threads();\r\n    cout &lt;&lt; \"All Threads num: \" &lt;&lt; threads_num &lt;&lt; endl;\r\n\r\n    #pragma omp parallel for\r\n    for( int i = 0; i &lt; 10; ++i ){\r\n        \/\/ \u4e26\u5217\u3059\u308b\u51e6\u7406\r\n        #pragma omp critical\r\n        cout &lt;&lt; \"Thread No. \" &lt;&lt; omp_get_thread_num() &lt;&lt; endl;\r\n\r\n    }\r\n\r\n    return 0;\r\n}<\/pre>\n<p>\u305d\u3046\u3059\u308b\u3068\uff0c<\/p>\n<pre class=\"lang:c++ decode:true \">Thread No. 7\r\nThread No. 3\r\nThread No. 2\r\nThread No. 4\r\nThread No. 1\r\nThread No. 1\r\nThread No. 0\r\nThread No. 0\r\nThread No. 6\r\nThread No. 5<\/pre>\n<p>\u5165\u308a\u4e71\u308c\u308b\u3053\u3068\u306f\u306a\u304f\u306a\u308a\u307e\u3057\u305f\uff0e<\/p>\n<p>\u3053\u306e\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u30bb\u30af\u30b7\u30e7\u30f3\u306f\u4e0a\u624b\u304f\u4f7f\u308f\u306a\u3044\u3068\uff0c\u4e88\u60f3\u5916\u306e\u7d50\u679c\u304c\u8fd4\u3063\u3066\u304f\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\uff0e<\/p>\n<p>\u4f8b\u3048\u3070\uff0c<\/p>\n<pre class=\"lang:c++ decode:true \">#include &lt;iostream&gt;\r\n#include &lt;vector&gt;\r\n#include &lt;omp.h&gt;\r\n\r\nusing namespace std;\r\n\r\nint main() {\r\n    int threads_num = omp_get_max_threads();\r\n    cout &lt;&lt; \"All Threads num: \" &lt;&lt; threads_num &lt;&lt; endl;\r\n\r\n    int sum = 0;\r\n\r\n    vector&lt;int&gt; vec(100, 0);\r\n    for( int i = 0; i &lt; 100; ++i ){\r\n        vec[i] = i;\r\n    }\r\n\r\n    #pragma omp parallel for\r\n    for(int i = 0; i &lt; 100; ++i ){\r\n        sum += vec[i];\r\n    }\r\n\r\n    cout &lt;&lt; \"sum: \" &lt;&lt; sum &lt;&lt; endl;\r\n\r\n    return 0;\r\n}<\/pre>\n<p>\u3092\u5b9f\u884c\u3059\u308b\u3068\uff0c\u5b9f\u884c\u306e\u5ea6\u306b\u9055\u3046\u7d50\u679c\u304c\u8fd4\u3063\u3066\u304f\u308b\uff0e<\/p>\n<p>\u305d\u3053\u3067\uff0c<\/p>\n<pre class=\"lang:c++ decode:true \">#pragma omp parallel for\r\nfor(int i = 0; i &lt; 100; ++i ){\r\n    #pragma omp critical\r\n    sum += vec[i];\r\n}<\/pre>\n<p>\u3068\u3059\u308b\u3060\u3051\u3067\uff0c\u304a\u304b\u3057\u306a\u7d50\u679c\u304c\u8fd4\u3063\u3066\u304f\u308b\u3053\u3068\u306f\u306a\u304f\u306a\u308b\uff0e<\/p>\n<h3><span class=\"ez-toc-section\" id=\"reduction\"><\/span>reduction<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u4ed6\u306b\u3082\u7af6\u5408\u3092\u89e3\u6d88\u3059\u308b\u65b9\u6cd5\u306f\uff0c<mark>reduction\u6307\u793a\u7bc0<\/mark>\u3092\u8a18\u8ff0\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308b\uff0e<\/p>\n<p>\u8a18\u6cd5\u306f <strong>reduction({\u6f14\u7b97\u5b50}: {\u5909\u6570\u540d})<\/strong> \u3067\uff0c\u30b9\u30ec\u30c3\u30c9\u9593\u3067\u5171\u6709\u3057\u305f\u3044\u5909\u6570\u3092\u3042\u3089\u304b\u3058\u3081\u5ba3\u8a00\u3057\u3066\u304a\u304f\u3068\u3044\u3046\u3082\u306e\uff0e<\/p>\n<p>\u4f8b\u3048\u3070\u5148\u307b\u3069\u306e\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u3044\u3066\u3082\u671f\u5f85\u901a\u308a\u306e\u7d50\u679c\u304c\u5f97\u3089\u308c\u308b\uff0e<\/p>\n<pre class=\"lang:c++ decode:true \">#pragma omp parallel for reduction(+:sum)\r\nfor(int i = 0; i &lt; 100; ++i ){\r\n    sum += vec[i];\r\n}<\/pre>\n<p>\u3053\u3063\u3061\u306e\u65b9\u304c\u30b9\u30de\u30fc\u30c8\u306a\u306e\u304b\u3082\u3057\u308c\u306a\u3044\uff0e<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E3%82%A4%E3%83%86%E3%83%AC%E3%83%BC%E3%82%B7%E3%83%A7%E3%83%B3%E3%83%AB%E3%83%BC%E3%83%97%E3%81%AF%E4%BD%BF%E3%81%88%E3%81%AA%E3%81%84\"><\/span>\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30d7\u306f\u4f7f\u3048\u306a\u3044<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u4f7f\u3063\u3066\u3044\u3066\u6c17\u3065\u3044\u305f\u304c\uff0c<span class=\"lang:c++ decode:true crayon-inline \">for( auto v : vec )<\/span>\u00a0\u306e\u3088\u3046\u306a\u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u4f7f\u3063\u305f\u30eb\u30fc\u30d7\u306f\u4e26\u5217\u5316\u3067\u304d\u306a\u3044\uff0e<\/p>\n<p>\u3053\u308c\u306f\uff0cOpenMP\u304c<mark>\u4f55\u56de\u30eb\u30fc\u30d7\u304c\u3042\u308b\u304b\u4e8b\u524d\u306b\u308f\u304b\u3089\u306a\u3044\u304b\u3089\uff0c\u4e26\u5217\u3057\u3088\u3046\u304c\u306a\u3044<\/mark>\uff0c\u3068\u3044\u3046\u3053\u3068\u3089\u3057\u3044\uff0e<\/p>\n<p>\u307e\u3042\u78ba\u304b\u306b\u305d\u3046\u3060\uff0e\u7b11<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E3%81%8A%E3%82%8F%E3%82%8A%E3%81%AB\"><\/span>\u304a\u308f\u308a\u306b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u7c21\u5358\u306b\u3067\u306f\u3042\u308a\u307e\u3059\u304c\uff0c<mark>OpenMP<\/mark>\u306b\u3064\u3044\u3066\u8a18\u4e8b\u3092\u66f8\u304d\u307e\u3057\u305f\uff0e<\/p>\n<p>\u3068\u308a\u3042\u3048\u305a\u4f7f\u3048\u305d\u3046\u306a\u60c5\u5831\u3060\u3051\u66f8\u304d\u307e\u3057\u305f\uff0e<\/p>\n<p>\u307b\u3068\u3093\u3069\u5099\u5fd8\u9332\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u304c\uff0c\u8ab0\u304b\u306e\u8208\u5473\u306b\u523a\u3055\u3063\u305f\u308a\uff0c\u56f0\u3063\u3066\u3044\u308b\u4eba\u306e\u624b\u52a9\u3051\u306b\u306a\u308c\u3070\u5e78\u3044\u3067\u3059\uff0e<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30b3\u30f3\u30c6\u30f3\u30c4 OpenMP\u4e0b\u6e96\u5099Operation not permittedCLion\u306a\u3069\u306eIDE\u3092\u7528\u3044\u308b\u5834\u5408CMakeLists.txt\u306b\u66f8\u304f\u3053\u3068OpenMP\u3092\u4f7f\u3063\u3066\u307f\u308b\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u30bb\u30af\u30b7\u30e7\u30f3\u306e\u6307\u5b9areduction\u30a4 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":588,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[12,25,54,53,52],"_links":{"self":[{"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/posts\/578"}],"collection":[{"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/comments?post=578"}],"version-history":[{"count":12,"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/posts\/578\/revisions"}],"predecessor-version":[{"id":794,"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/posts\/578\/revisions\/794"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/media\/588"}],"wp:attachment":[{"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/media?parent=578"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/categories?post=578"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hirlab.net\/nblog\/wp-json\/wp\/v2\/tags?post=578"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}