{"id":125616,"date":"2024-03-24T19:32:32","date_gmt":"2024-03-24T10:32:32","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/%e7%95%b0%e3%81%aa%e3%82%8b%e3%83%97%e3%83%ad%e3%82%bb%e3%83%83%e3%82%b5%e7%be%a4%e3%81%ab%e7%94%b1%e6%9d%a5%e3%81%99%e3%82%8b%e5%88%a5%e5%80%8b%e3%81%ae%e5%80%a4%e3%82%92%e7%8b%ac%e7%ab%8b%e3%81%ab\/"},"modified":"2024-03-27T13:02:38","modified_gmt":"2024-03-27T04:02:38","slug":"%e7%95%b0%e3%81%aa%e3%82%8b%e3%83%97%e3%83%ad%e3%82%bb%e3%83%83%e3%82%b5%e7%be%a4%e3%81%ab%e7%94%b1%e6%9d%a5%e3%81%99%e3%82%8b%e5%88%a5%e5%80%8b%e3%81%ae%e5%80%a4%e3%82%92%e7%8b%ac%e7%ab%8b%e3%81%ab","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/%e7%95%b0%e3%81%aa%e3%82%8b%e3%83%97%e3%83%ad%e3%82%bb%e3%83%83%e3%82%b5%e7%be%a4%e3%81%ab%e7%94%b1%e6%9d%a5%e3%81%99%e3%82%8b%e5%88%a5%e5%80%8b%e3%81%ae%e5%80%a4%e3%82%92%e7%8b%ac%e7%ab%8b%e3%81%ab\/","title":{"rendered":"\u7570\u306a\u308b\u30d7\u30ed\u30bb\u30c3\u30b5\u7fa4\u306b\u7531\u6765\u3059\u308b\u5225\u500b\u306e\u5024\u3092\u72ec\u7acb\u306b\u8db3\u3057\u5408\u308f\u305b\u308b\u306b\u306fMPI_Reduce\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002"},"content":{"rendered":"<p>MPI_Reduce\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u7570\u306a\u308b\u30d7\u30ed\u30bb\u30c3\u30b5\u30fb\u30b0\u30eb\u30fc\u30d7\u304b\u3089\u306e\u7570\u306a\u308b\u5024\u306e\u6392\u4ed6\u7684\u52a0\u7b97\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001MPI_Reduce\u3092\u4f7f\u7528\u3057\u305f\u52a0\u7b97\u624b\u9806\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<ol>\n<li>MPI\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u307e\u3059\uff1a<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;mpi.h&gt;<\/span><\/span>\r\n<\/code><\/pre>\n<ol>\n<li>MPI\u306e\u521d\u671f\u5316\uff1a<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-built_in\">MPI_Init<\/span>(<span class=\"hljs-literal\">NULL<\/span>, <span class=\"hljs-literal\">NULL<\/span>);\r\n<\/code><\/pre>\n<ol>\n<li>\u30ab\u30ec\u30f3\u30c8\u30d7\u30ed\u30bb\u30b9\u306e\u30e9\u30f3\u30af\u3068\u30d7\u30ed\u30bb\u30b9\u7dcf\u6570\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">int<\/span> rank, size;\r\n<span class=\"hljs-built_in\">MPI_Comm_rank<\/span>(MPI_COMM_WORLD, &amp;rank);\r\n<span class=\"hljs-built_in\">MPI_Comm_size<\/span>(MPI_COMM_WORLD, &amp;size);\r\n<\/code><\/pre>\n<ol>\n<li>\u5404\u30d7\u30ed\u30bb\u30b9\u305d\u308c\u305e\u308c\u306b\u3064\u3044\u3066\u30ed\u30fc\u30ab\u30eb\u306a\u5024\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">int<\/span> local_value = ...; <span class=\"hljs-comment\">\/\/ \u6bcf\u4e2a\u8fdb\u7a0b\u7684\u672c\u5730\u503c<\/span>\r\n<\/code><\/pre>\n<ol>\n<li>\u30b0\u30ed\u30fc\u30d0\u30eb\u5024\u306e\u5909\u6570\u3092\u5b9a\u7fa9\u3057\u30010\u306b\u521d\u671f\u5316\u3059\u308b<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">int<\/span> global_value = <span class=\"hljs-number\">0<\/span>; <span class=\"hljs-comment\">\/\/ \u5168\u5c40\u503c\u7684\u53d8\u91cf<\/span>\r\n<\/code><\/pre>\n<ol>\n<li>MPI_Reduce\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3059\u3079\u3066\u306e\u30d7\u30ed\u30bb\u30b9\u30ed\u30fc\u30ab\u30eb\u306e\u5024\u3092\u5408\u8a08\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-built_in\">MPI_Reduce<\/span>(&amp;local_value, &amp;global_value, <span class=\"hljs-number\">1<\/span>, MPI_INT, MPI_SUM, <span class=\"hljs-number\">0<\/span>, MPI_COMM_WORLD);\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u306b\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u89e3\u8aac\u3092\u793a\u3057\u307e\u3059<\/p>\n<ol>\n<li>&amp;local_value: \u30ed\u30fc\u30ab\u30eb\u5024\u3092\u6307\u3059\u30dd\u30a4\u30f3\u30bf<\/li>\n<li>&amp;global_value\uff1a\u30b0\u30ed\u30fc\u30d0\u30eb\u5024\u3078\u306e\u30dd\u30a4\u30f3\u30bf<\/li>\n<li>\u30ed\u30fc\u30ab\u30eb\u5024\u306e\u500b\u6570\u3002<\/li>\n<li>MPI_INT: \u30c7\u30fc\u30bf\u578b\u306f\u30ed\u30fc\u30ab\u30eb\u5024<\/li>\n<li>MPI_SUM: \u6307\u5b9a\u3057\u305f\u52a0\u7b97\u6f14\u7b97<\/li>\n<li>\u7d50\u679c\u3092\u53d7\u4fe1\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u306e\u30e9\u30f3\u30af\u3002<\/li>\n<li>MPI_COMM_WORLD: \u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30bf\u30fc<\/li>\n<\/ol>\n<ol>\n<li>\u7d50\u679c\u3092\u53d7\u3051\u53d6\u308b\u30d7\u30ed\u30bb\u30b9\u5185\u3067\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u5024\u3092\u51fa\u529b\u3059\u308b:<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">if<\/span> (rank == <span class=\"hljs-number\">0<\/span>) {\r\n<span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"The sum of all values is %d\\n\"<\/span>, global_value);\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>MPI\u3092\u7d42\u4e86\u3059\u308b\uff1a<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-built_in\">MPI_Finalize<\/span>();\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u306b\u5b8c\u5168\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;mpi.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;stdio.h&gt;<\/span><\/span>\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">int<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">int<\/span> argc, <span class=\"hljs-type\">char<\/span>** argv)<\/span> <\/span>{\r\n<span class=\"hljs-built_in\">MPI_Init<\/span>(<span class=\"hljs-literal\">NULL<\/span>, <span class=\"hljs-literal\">NULL<\/span>);\r\n<span class=\"hljs-type\">int<\/span> rank, size;\r\n<span class=\"hljs-built_in\">MPI_Comm_rank<\/span>(MPI_COMM_WORLD, &amp;rank);\r\n<span class=\"hljs-built_in\">MPI_Comm_size<\/span>(MPI_COMM_WORLD, &amp;size);\r\n<span class=\"hljs-type\">int<\/span> local_value = rank + <span class=\"hljs-number\">1<\/span>; <span class=\"hljs-comment\">\/\/ \u6bcf\u4e2a\u8fdb\u7a0b\u7684\u672c\u5730\u503c<\/span>\r\n<span class=\"hljs-type\">int<\/span> global_value = <span class=\"hljs-number\">0<\/span>; <span class=\"hljs-comment\">\/\/ \u5168\u5c40\u503c\u7684\u53d8\u91cf<\/span>\r\n<span class=\"hljs-built_in\">MPI_Reduce<\/span>(&amp;local_value, &amp;global_value, <span class=\"hljs-number\">1<\/span>, MPI_INT, MPI_SUM, <span class=\"hljs-number\">0<\/span>, MPI_COMM_WORLD);\r\n<span class=\"hljs-keyword\">if<\/span> (rank == <span class=\"hljs-number\">0<\/span>) {\r\n<span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"The sum of all values is %d\\n\"<\/span>, global_value);\r\n}\r\n<span class=\"hljs-built_in\">MPI_Finalize<\/span>();\r\n<span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>\u5404\u30d7\u30ed\u30bb\u30b9\u81ea\u8eab\u306erank\u3092\u30ed\u30fc\u30ab\u30eb\u306a\u5024\u3068\u3057\u30661\u5897\u3084\u3057\u3001MPI_Reduce\u95a2\u6570\u3067\u5168\u30d7\u30ed\u30bb\u30b9\u5206\u306e\u30ed\u30fc\u30ab\u30eb\u306a\u5024\u306e\u548c\u3092\u96c6\u8a08\u3057\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u5024\uff08\u30ed\u30fc\u30ab\u30eb\u5024\u306e\u3059\u3079\u3066\u306e\u5408\u8a08\uff09\u306e\u7d50\u679c\u3092\u51fa\u529b\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MPI_Reduce\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u7570\u306a\u308b\u30d7\u30ed\u30bb\u30c3\u30b5\u30fb\u30b0\u30eb\u30fc\u30d7\u304b\u3089\u306e\u7570\u306a\u308b\u5024\u306e\u6392\u4ed6\u7684\u52a0\u7b97\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001MPI_Reduce\u3092\u4f7f\u7528\u3057\u305f\u52a0\u7b97\u624b\u9806\u3092\u793a\u3057\u307e\u3059\u3002 MPI\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u307e\u3059\uff1a #incl [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-125616","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u7570\u306a\u308b\u30d7\u30ed\u30bb\u30c3\u30b5\u7fa4\u306b\u7531\u6765\u3059\u308b\u5225\u500b\u306e\u5024\u3092\u72ec\u7acb\u306b\u8db3\u3057\u5408\u308f\u305b\u308b\u306b\u306fMPI_Reduce\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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content=\"MPI_Reduce\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u7570\u306a\u308b\u30d7\u30ed\u30bb\u30c3\u30b5\u30fb\u30b0\u30eb\u30fc\u30d7\u304b\u3089\u306e\u7570\u306a\u308b\u5024\u306e\u6392\u4ed6\u7684\u52a0\u7b97\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001MPI_Reduce\u3092\u4f7f\u7528\u3057\u305f\u52a0\u7b97\u624b\u9806\u3092\u793a\u3057\u307e\u3059\u3002 MPI\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u307e\u3059\uff1a #incl [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/\u7570\u306a\u308b\u30d7\u30ed\u30bb\u30c3\u30b5\u7fa4\u306b\u7531\u6765\u3059\u308b\u5225\u500b\u306e\u5024\u3092\u72ec\u7acb\u306b\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-24T10:32:32+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-27T04:02:38+00:00\" \/>\n<meta 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