{"id":17728,"date":"2024-11-18T11:46:40","date_gmt":"2024-11-18T03:46:40","guid":{"rendered":"https:\/\/fwq.ai\/blog\/17728\/"},"modified":"2024-11-18T11:46:40","modified_gmt":"2024-11-18T03:46:40","slug":"linux%e8%bf%9b%e7%a8%8b%e4%bc%98%e5%85%88%e7%ba%a7%e8%b0%83%e5%ba%a6%e6%9c%ba%e5%88%b6%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/17728\/","title":{"rendered":"Linux\u8fdb\u7a0b\u4f18\u5148\u7ea7\u8c03\u5ea6\u673a\u5236\u89e3\u6790"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/000\/000\/164\/171046656566399.jpg\" class=\"aligncenter\" title=\"Linux\u8fdb\u7a0b\u4f18\u5148\u7ea7\u8c03\u5ea6\u673a\u5236\u89e3\u6790\u63d2\u56fe\" alt=\"Linux\u8fdb\u7a0b\u4f18\u5148\u7ea7\u8c03\u5ea6\u673a\u5236\u89e3\u6790\u63d2\u56fe\" \/><\/p>\n<p>\u6807\u9898\uff1aLinux\u8fdb\u7a0b\u4f18\u5148\u7ea7\u8c03\u5ea6\u673a\u5236\u89e3\u6790<\/p>\n<p>Linux\u64cd\u4f5c\u7cfb\u7edf\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u64cd\u4f5c\u7cfb\u7edf\uff0c\u5177\u6709\u5f3a\u5927\u7684\u591a\u4efb\u52a1\u5904\u7406\u80fd\u529b\u3002\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u8fdb\u7a0b\u7684\u8c03\u5ea6\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u5b83\u5f71\u54cd\u7740\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u54cd\u5e94\u901f\u5ea6\u3002\u4e3a\u4e86\u66f4\u597d\u5730\u8fdb\u884c\u8fdb\u7a0b\u8c03\u5ea6\uff0cLinux\u7cfb\u7edf\u5b9e\u73b0\u4e86\u8fdb\u7a0b\u4f18\u5148\u7ea7\u8c03\u5ea6\u673a\u5236\u3002<\/p>\n<h3>1. \u8fdb\u7a0b\u4f18\u5148\u7ea7<\/h3>\n<p>\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u6709\u4e00\u4e2a\u4f18\u5148\u7ea7\uff0c\u7528\u6765\u51b3\u5b9a\u8fdb\u7a0b\u5728\u7cfb\u7edf\u4e2d\u7684\u8c03\u5ea6\u987a\u5e8f\u3002\u4f18\u5148\u7ea7\u7684\u53d6\u503c\u8303\u56f4\u901a\u5e38\u662f0~139\uff0c\u5176\u4e2d0\u4ee3\u8868\u6700\u9ad8\u4f18\u5148\u7ea7\uff0c139\u4ee3\u8868\u6700\u4f4e\u4f18\u5148\u7ea7\u3002\u8fdb\u7a0b\u7684\u4f18\u5148\u7ea7\u53ef\u4ee5\u901a\u8fc7nice\u503c\u6765\u8bbe\u7f6e\uff0cnice\u503c\u7684\u8303\u56f4\u662f-20~19\uff0c\u503c\u8d8a\u5c0f\u8868\u793a\u4f18\u5148\u7ea7\u8d8a\u9ad8\u3002<\/p>\n<h3>2. \u8fdb\u7a0b\u8c03\u5ea6\u7b56\u7565<\/h3>\n<p>Linux\u7cfb\u7edf\u91c7\u7528\u4e86\u591a\u79cd\u4e0d\u540c\u7684\u8fdb\u7a0b\u8c03\u5ea6\u7b56\u7565\uff0c\u5e38\u89c1\u7684\u6709\u4e24\u79cd\uff1a\u5b9e\u65f6\u8c03\u5ea6\u7b56\u7565\u548c\u975e\u5b9e\u65f6\u8c03\u5ea6\u7b56\u7565\u3002\u5b9e\u65f6\u8c03\u5ea6\u7b56\u7565\u5305\u62ecFIFO\u8c03\u5ea6\u548cRound-Robin\u8c03\u5ea6\uff0c\u975e\u5b9e\u65f6\u8c03\u5ea6\u7b56\u7565\u5305\u62ec\u516c\u5e73\u8c03\u5ea6\u548c\u5177\u6709\u4f18\u5148\u7ea7\u7684\u8c03\u5ea6\u3002<\/p>\n<h3>3. \u8fdb\u7a0b\u8c03\u5ea6\u5b9e\u73b0<\/h3>\n<p>Linux\u7cfb\u7edf\u4e2d\u4f7f\u7528CFS\uff08Completely Fair Scheduler\uff09\u8c03\u5ea6\u5668\u6765\u8fdb\u884c\u8fdb\u7a0b\u7684\u8c03\u5ea6\u3002CFS\u8c03\u5ea6\u5668\u6839\u636e\u8fdb\u7a0b\u7684\u4f18\u5148\u7ea7\u548cVRuntime\uff08\u865a\u62df\u8fd0\u884c\u65f6\u95f4\uff09\u6765\u51b3\u5b9a\u4e0b\u4e00\u4e2a\u8981\u8fd0\u884c\u7684\u8fdb\u7a0b\u3002\u5177\u6709\u66f4\u5c0fVRuntime\u7684\u8fdb\u7a0b\u5c06\u88ab\u4f18\u5148\u9009\u4e2d\u8fdb\u884c\u8c03\u5ea6\u3002<\/p>\n<h3>4. \u4ee3\u7801\u793a\u4f8b<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684C\u7a0b\u5e8f\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u8fdb\u7a0b\u5e76\u8bbe\u7f6e\u5176\u4f18\u5148\u7ea7\uff1a<\/p>\n<pre>#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\n#include &lt;sys&gt;\n#include &lt;unistd.h&gt;\n\nint main() {\n    pid_t pid;\n    int nice_val = 0;\n\n    pid = fork();\n\n    if (pid &lt;p&gt;\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u901a\u8fc7\u8c03\u7528nice\u51fd\u6570\u53ef\u4ee5\u8bbe\u7f6e\u8fdb\u7a0b\u7684nice\u503c\uff0c\u4ece\u800c\u5f71\u54cd\u8fdb\u7a0b\u7684\u4f18\u5148\u7ea7\u3002\u5b50\u8fdb\u7a0b\u548c\u7236\u8fdb\u7a0b\u5206\u522b\u8bbe\u7f6e\u4e86\u4e0d\u540c\u7684nice\u503c\uff0c\u4ee5\u5c55\u793a\u8fdb\u7a0b\u4f18\u5148\u7ea7\u7684\u5dee\u5f02\u3002&lt;\/p&gt;\n&lt;h3&gt;\u7ed3\u8bed&lt;\/h3&gt;\n&lt;p&gt;\u901a\u8fc7\u4ee5\u4e0a\u5206\u6790\u548c\u4ee3\u7801\u793a\u4f8b\uff0c\u6211\u4eec\u5bf9Linux\u8fdb\u7a0b\u4f18\u5148\u7ea7\u8c03\u5ea6\u673a\u5236\u6709\u4e86\u66f4\u6df1\u5165\u7684\u4e86\u89e3\u3002\u8fdb\u7a0b\u4f18\u5148\u7ea7\u8c03\u5ea6\u673a\u5236\u5bf9\u4e8e\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u8d44\u6e90\u5206\u914d\u8d77\u7740\u81f3\u5173\u91cd\u8981\u7684\u4f5c\u7528\uff0c\u7406\u89e3\u548c\u638c\u63e1\u8fd9\u4e00\u673a\u5236\u5bf9\u4e8e\u7cfb\u7edf\u7ba1\u7406\u5458\u548c\u5f00\u53d1\u4eba\u5458\u6765\u8bf4\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002&lt;\/p&gt;&lt;\/unistd.h&gt;&lt;\/sys&gt;&lt;\/stdlib.h&gt;&lt;\/stdio.h&gt;<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fLinux\u8fdb\u7a0b\u4f18\u5148\u7ea7\u8c03\u5ea6\u673a\u5236\u89e3\u6790\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6807\u9898\uff1aLinux\u8fdb\u7a0b\u4f18\u5148\u7ea7\u8c03\u5ea6\u673a\u5236\u89e3\u6790 Linux\u64cd\u4f5c\u7cfb\u7edf\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u64cd\u4f5c\u7cfb\u7edf\uff0c\u5177\u6709\u5f3a\u5927\u7684\u591a\u4efb\u52a1\u5904\u7406\u80fd\u529b\u3002\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u8fdb\u7a0b\u7684\u8c03\u5ea6\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u5b83\u5f71\u54cd\u7740\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u54cd\u5e94\u901f\u5ea6\u3002\u4e3a\u4e86\u66f4\u597d\u5730\u8fdb\u884c\u8fdb\u7a0b\u8c03\u5ea6\uff0cLinux\u7cfb\u7edf\u5b9e\u73b0\u4e86\u8fdb\u7a0b\u4f18\u5148\u7ea7\u8c03\u5ea6\u673a\u5236\u3002 1. \u8fdb\u7a0b\u4f18\u5148\u7ea7 \u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u6709\u4e00\u4e2a\u4f18\u5148\u7ea7\uff0c\u7528\u6765\u51b3\u5b9a\u8fdb\u7a0b\u5728\u7cfb\u7edf\u4e2d\u7684\u8c03\u5ea6\u987a\u5e8f\u3002\u4f18\u5148\u7ea7\u7684\u53d6\u503c\u8303\u56f4\u901a\u5e38\u662f0~139\uff0c\u5176\u4e2d0\u4ee3\u8868\u6700\u9ad8\u4f18\u5148\u7ea7\uff0c139\u4ee3\u8868\u6700\u4f4e\u4f18\u5148\u7ea7\u3002\u8fdb\u7a0b\u7684\u4f18\u5148\u7ea7\u53ef\u4ee5\u901a\u8fc7nice\u503c\u6765\u8bbe\u7f6e\uff0cnice\u503c\u7684\u8303\u56f4\u662f-20~19\uff0c\u503c\u8d8a\u5c0f\u8868\u793a\u4f18\u5148\u7ea7\u8d8a\u9ad8\u3002 2. \u8fdb\u7a0b\u8c03\u5ea6\u7b56\u7565 Linux\u7cfb\u7edf\u91c7\u7528\u4e86\u591a\u79cd\u4e0d\u540c\u7684\u8fdb\u7a0b\u8c03\u5ea6\u7b56\u7565\uff0c\u5e38\u89c1\u7684\u6709\u4e24\u79cd\uff1a\u5b9e\u65f6\u8c03\u5ea6\u7b56\u7565\u548c\u975e\u5b9e\u65f6\u8c03\u5ea6\u7b56\u7565\u3002\u5b9e\u65f6\u8c03\u5ea6\u7b56\u7565\u5305\u62ecFIFO\u8c03\u5ea6\u548cRound-Robin\u8c03\u5ea6\uff0c\u975e\u5b9e\u65f6\u8c03\u5ea6\u7b56\u7565\u5305\u62ec\u516c\u5e73\u8c03\u5ea6\u548c\u5177\u6709\u4f18\u5148\u7ea7\u7684\u8c03\u5ea6\u3002 3. \u8fdb\u7a0b\u8c03\u5ea6\u5b9e\u73b0 Linux\u7cfb\u7edf\u4e2d\u4f7f\u7528CFS\uff08Completely Fair Scheduler\uff09\u8c03\u5ea6\u5668\u6765\u8fdb\u884c\u8fdb\u7a0b\u7684\u8c03\u5ea6\u3002CFS\u8c03\u5ea6\u5668\u6839\u636e\u8fdb\u7a0b\u7684\u4f18\u5148\u7ea7\u548cVRuntime\uff08\u865a\u62df\u8fd0\u884c\u65f6\u95f4\uff09\u6765\u51b3\u5b9a\u4e0b\u4e00\u4e2a\u8981\u8fd0\u884c\u7684\u8fdb\u7a0b\u3002\u5177\u6709\u66f4\u5c0fVRuntime\u7684\u8fdb\u7a0b\u5c06\u88ab\u4f18\u5148\u9009\u4e2d\u8fdb\u884c\u8c03\u5ea6\u3002 4. \u4ee3\u7801\u793a\u4f8b \u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684C\u7a0b\u5e8f\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u8fdb\u7a0b\u5e76\u8bbe\u7f6e\u5176\u4f18\u5148\u7ea7\uff1a #include &lt;stdio.h&gt; #include &lt;stdlib.h&gt; #include &lt;sys&gt; #include &lt;unistd.h&gt; int main() { pid_t pid; int nice_val = 0; pid = fork(); if (pid &lt;p&gt;\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u901a\u8fc7\u8c03\u7528nice\u51fd\u6570\u53ef\u4ee5\u8bbe\u7f6e\u8fdb\u7a0b\u7684nice\u503c\uff0c\u4ece\u800c\u5f71\u54cd\u8fdb\u7a0b\u7684\u4f18\u5148\u7ea7\u3002\u5b50\u8fdb\u7a0b\u548c\u7236\u8fdb\u7a0b\u5206\u522b\u8bbe\u7f6e\u4e86\u4e0d\u540c\u7684nice\u503c\uff0c\u4ee5\u5c55\u793a\u8fdb\u7a0b\u4f18\u5148\u7ea7\u7684\u5dee\u5f02\u3002&lt;\/p&gt; &lt;h3&gt;\u7ed3\u8bed&lt;\/h3&gt; &lt;p&gt;\u901a\u8fc7\u4ee5\u4e0a\u5206\u6790\u548c\u4ee3\u7801\u793a\u4f8b\uff0c\u6211\u4eec\u5bf9Linux\u8fdb\u7a0b\u4f18\u5148\u7ea7\u8c03\u5ea6\u673a\u5236\u6709\u4e86\u66f4\u6df1\u5165\u7684\u4e86\u89e3\u3002\u8fdb\u7a0b\u4f18\u5148\u7ea7\u8c03\u5ea6\u673a\u5236\u5bf9\u4e8e\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u8d44\u6e90\u5206\u914d\u8d77\u7740\u81f3\u5173\u91cd\u8981\u7684\u4f5c\u7528\uff0c\u7406\u89e3\u548c\u638c\u63e1\u8fd9\u4e00\u673a\u5236\u5bf9\u4e8e\u7cfb\u7edf\u7ba1\u7406\u5458\u548c\u5f00\u53d1\u4eba\u5458\u6765\u8bf4\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002&lt;\/p&gt;&lt;\/unistd.h&gt;&lt;\/sys&gt;&lt;\/stdlib.h&gt;&lt;\/stdio.h&gt; \u767b\u5f55\u540e\u590d\u5236 \u4ee5\u4e0a\u5c31\u662fLinux\u8fdb\u7a0b\u4f18\u5148\u7ea7\u8c03\u5ea6\u673a\u5236\u89e3\u6790\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-17728","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/17728","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=17728"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/17728\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=17728"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=17728"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=17728"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}