{"id":4314,"date":"2013-03-10T13:13:32","date_gmt":"2013-03-10T05:13:32","guid":{"rendered":"http:\/\/edsionte.com\/techblog\/?p=4314"},"modified":"2013-04-25T15:04:44","modified_gmt":"2013-04-25T07:04:44","slug":"cgroup%e7%ae%80%e4%bb%8b","status":"publish","type":"post","link":"http:\/\/edsionte.com\/techblog\/archives\/4314","title":{"rendered":"Cgroup\u7b80\u4ecb-\u6982\u8ff0"},"content":{"rendered":"

Cgroup\uff08Control Groups\uff09\u662f\u8fd9\u6837\u4e00\u79cd\u673a\u5236\uff1a\u5b83\u4ee5\u5206\u7ec4\u7684\u5f62\u5f0f\u5bf9\u8fdb\u7a0b\u4f7f\u7528\u7cfb\u7edf\u8d44\u6e90\u7684\u884c\u4e3a\u8fdb\u884c\u7ba1\u7406\u548c\u63a7\u5236\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u7528\u6237\u901a\u8fc7cgroup\u5bf9\u6240\u6709\u8fdb\u7a0b\u8fdb\u884c\u5206\u7ec4\uff0c\u518d\u5bf9\u8be5\u5206\u7ec4\u6574\u4f53\u8fdb\u884c\u8d44\u6e90\u7684\u5206\u914d\u548c\u63a7\u5236\u3002<\/p>\n

1 Cgroup\u7684\u7ed3\u6784<\/h3>\n

cgroup\u4e2d\u7684\u6bcf\u4e2a\u5206\u7ec4\u79f0\u4e3a\u8fdb\u7a0b\u7ec4\uff0c\u5b83\u5305\u542b\u591a\u4e2a\u8fdb\u7a0b\u3002\u6700\u521d\u60c5\u51b5\u4e0b\uff0c\u7cfb\u7edf\u5185\u7684\u6240\u6709\u8fdb\u7a0b\u5f62\u6210\u4e00\u4e2a\u8fdb\u7a0b\u7ec4\uff08\u6839\u8fdb\u7a0b\u7ec4\uff09\uff0c\u6839\u636e\u7cfb\u7edf\u5bf9\u8d44\u6e90\u7684\u9700\u6c42\uff0c\u8fd9\u4e2a\u6839\u8fdb\u7a0b\u7ec4\u5c06\u88ab\u8fdb\u4e00\u6b65\u7ec6\u5206\u4e3a\u5b50\u8fdb\u7a0b\u7ec4\uff0c\u5b50\u8fdb\u7a0b\u7ec4\u5185\u7684\u8fdb\u7a0b\u662f\u6839\u8fdb\u7a0b\u7ec4\u5185\u8fdb\u7a0b\u7684\u5b50\u96c6\u3002\u800c\u8fd9\u4e9b\u5b50\u8fdb\u7a0b\u7ec4\u5f88\u6709\u53ef\u80fd\u7ee7\u7eed\u88ab\u8fdb\u4e00\u6b65\u7ec6\u5206\uff0c\u6700\u7ec8\uff0c\u7cfb\u7edf\u5185\u6240\u6709\u7684\u8fdb\u7a0b\u7ec4\u5f62\u6210\u4e00\u9897\u5177\u6709\u5c42\u6b21\u7b49\u7ea7\uff08hierarchy\uff09\u5173\u7cfb\u7684\u8fdb\u7a0b\u7ec4\u6811\u3002\u5982\u4e0b\u56fe\uff1a<\/p>\n

\"cgroup_tree\"<\/a><\/p>\n

\u7531\u4e8e\u8fdb\u7a0b\u7ec4\u53ef\u4ee5\u88ab\u8fdb\u4e00\u6b65\u5212\u5206\uff0c\u56e0\u6b64\u4e00\u4e2a\u8fdb\u7a0b\u53ef\u80fd\u5904\u4e8e\u591a\u4e2a\u8fdb\u7a0b\u7ec4\u4e2d\uff0c\u4f46\u8fd9\u4e9b\u8fdb\u7a0b\u7ec4\u5fc5\u7136\u4e0d\u5904\u4e8e\u540c\u4e00\u5c42\u7ea7\u4e2d\u3002<\/p>\n

\u53e6\u5916\uff0c\u5982\u679c\u67d0\u4e2a\u8fdb\u7a0b\u7ec4\u5185\u7684\u8fdb\u7a0b\u521b\u5efa\u4e86\u5b50\u8fdb\u7a0b\uff0c\u90a3\u4e48\u8be5\u5b50\u8fdb\u7a0b\u9ed8\u8ba4\u4e0e\u7236\u8fdb\u7a0b\u5904\u4e8e\u540c\u4e00\u8fdb\u7a0b\u7ec4\u4e2d\u3002\u4e5f\u5c31\u662f\u8bf4\uff0ccgroup\u5bf9\u6539\u8fdb\u7a0b\u7ec4\u7684\u8d44\u6e90\u63a7\u5236\u540c\u6837\u4f5c\u7528\u4e8e\u5b50\u8fdb\u7a0b\u3002<\/p>\n

2 subsystem<\/h3>\n

cgroup\u662f\u4e00\u79cd\u5bf9\u8fdb\u7a0b\u8d44\u6e90\u7ba1\u7406\u548c\u63a7\u5236\u7684\u7edf\u4e00\u6846\u67b6\uff0c\u5b83\u63d0\u4f9b\u7684\u662f\u4e00\u79cd\u673a\u5236\uff08mechanism\uff09\uff0c\u800c\u5177\u4f53\u7684\u7b56\u7565\uff08policy\uff09\u662f\u901a\u8fc7\u5b50\u7cfb\u7edf\uff08subsystem\uff09\u6765\u5b8c\u6210\u7684\uff0c\u5b50\u7cfb\u7edf\u662fcgroup\u5bf9\u8fdb\u7a0b\u7ec4\u8fdb\u884c\u8d44\u6e90\u63a7\u5236\u7684\u5177\u4f53\u884c\u4e3a\u3002\u673a\u5236\u548c\u7b56\u7565\u662fLinux\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u4e00\u79cd\u7ecf\u5178\u7684\u8bbe\u8ba1\u601d\u60f3\uff0c\u6240\u8c13\u673a\u5236\u5c31\u662f\u201c\u6211\u8981\u63d0\u4f9b\u54ea\u79cd\u529f\u80fd\u201d\uff0c\u800c\u7b56\u7565\u5219\u662f\u201c\u6211\u8981\u600e\u6837\u6765\u5b9e\u73b0\u8fd9\u79cd\u529f\u80fd\u201d\u3002<\/p>\n

cgroup\u4e2d\u6bcf\u4e2a\u5b50\u7cfb\u7edf\u90fd\u4ee3\u8868\u4e00\u79cd\u7c7b\u578b\u7684\u8d44\u6e90\uff0c\u5177\u4f53\u5982\u4e0b\uff1a<\/p>\n

1) cpu\u5b50\u7cfb\u7edf\uff1a\u8be5\u5b50\u7cfb\u7edf\u4e3a\u6bcf\u4e2a\u8fdb\u7a0b\u7ec4\u8bbe\u7f6e\u4e00\u4e2a\u4f7f\u7528CPU\u7684\u6743\u91cd\u503c\uff0c\u4ee5\u6b64\u6765\u7ba1\u7406\u8fdb\u7a0b\u5bf9cpu\u7684\u8bbf\u95ee\u3002<\/p>\n

2) cpuset\u5b50\u7cfb\u7edf\uff1a\u5bf9\u4e8e\u591a\u6838cpu\uff0c\u8be5\u5b50\u7cfb\u7edf\u53ef\u4ee5\u8bbe\u7f6e\u8fdb\u7a0b\u7ec4\u53ea\u80fd\u5728\u6307\u5b9a\u7684\u6838\u4e0a\u8fd0\u884c\uff0c\u5e76\u4e14\u8fd8\u53ef\u4ee5\u8bbe\u7f6e\u8fdb\u7a0b\u7ec4\u5728\u6307\u5b9a\u7684\u5185\u5b58\u8282\u70b9\u4e0a\u7533\u8bf7\u5185\u5b58\u3002<\/p>\n

3) cpuacct\u5b50\u7cfb\u7edf\uff1a\u8be5\u5b50\u7cfb\u7edf\u53ea\u7528\u4e8e\u751f\u6210\u5f53\u524d\u8fdb\u7a0b\u7ec4\u5185\u7684\u8fdb\u7a0b\u5bf9cpu\u7684\u4f7f\u7528\u62a5\u544a\u3002<\/p>\n

4) memory\u5b50\u7cfb\u7edf\uff1a\u8be5\u5b50\u7cfb\u7edf\u63d0\u4f9b\u4e86\u4ee5\u9875\u9762\u4e3a\u5355\u4f4d\u5bf9\u5185\u5b58\u7684\u8bbf\u95ee\uff0c\u6bd4\u5982\u5bf9\u8fdb\u7a0b\u7ec4\u8bbe\u7f6e\u5185\u5b58\u4f7f\u7528\u4e0a\u9650\u7b49\uff0c\u540c\u65f6\u53ef\u4ee5\u751f\u6210\u5185\u5b58\u8d44\u6e90\u62a5\u544a<\/p>\n

5) blkio\u5b50\u7cfb\u7edf\uff1a\u8be5\u5b50\u7cfb\u7edf\u7528\u4e8e\u9650\u5236\u6bcf\u4e2a\u5757\u8bbe\u5907\u7684\u8f93\u5165\u8f93\u51fa\u3002\u9996\u5148\uff0c\u4e0eCPU\u5b50\u7cfb\u7edf\u7c7b\u4f3c\uff0c\u8be5\u7cfb\u7edf\u901a\u8fc7\u4e3a\u6bcf\u4e2a\u8fdb\u7a0b\u7ec4\u8bbe\u7f6e\u6743\u91cd\u6765\u63a7\u5236\u5757\u8bbe\u5907\u5bf9\u5176\u7684I\/O\u65f6\u95f4\uff1b\u5176\u6b21\uff0c\u8be5\u5b50\u7cfb\u7edf\u4e5f\u53ef\u4ee5\u9650\u5236\u8fdb\u7a0b\u7ec4\u7684I\/O\u5e26\u5bbd\u4ee5\u53caIOPS\u3002<\/p>\n

6) devices\u5b50\u7cfb\u7edf\uff1a\u901a\u8fc7\u8be5\u5b50\u7cfb\u7edf\u53ef\u4ee5\u9650\u5236\u8fdb\u7a0b\u7ec4\u5bf9\u8bbe\u5907\u7684\u8bbf\u95ee\uff0c\u5373\u8be5\u5141\u8bb8\u6216\u7981\u6b62\u8fdb\u7a0b\u7ec4\u5bf9\u67d0\u8bbe\u5907\u7684\u8bbf\u95ee\u3002<\/p>\n

7) freezer\u5b50\u7cfb\u7edf\uff1a\u8be5\u5b50\u7cfb\u7edf\u53ef\u4ee5\u4f7f\u5f97\u8fdb\u7a0b\u7ec4\u4e2d\u7684\u6240\u6709\u8fdb\u7a0b\u6302\u8d77\u3002<\/p>\n

8) net-cls\u5b50\u7cfb\u7edf\uff1a\u8be5\u5b50\u7cfb\u7edf\u63d0\u4f9b\u5bf9\u7f51\u7edc\u5e26\u5bbd\u7684\u8bbf\u95ee\u9650\u5236\uff0c\u6bd4\u5982\u5bf9\u53d1\u9001\u5e26\u5bbd\u548c\u63a5\u6536\u5e26\u5bbd\u8fdb\u7a0b\u9650\u5236\u3002<\/p>\n

\u5982\u679c\u8981\u5b9e\u73b0\u5b50\u7cfb\u7edf\u5bf9\u6240\u5c5e\u8fdb\u7a0b\u7ec4\u7684\u8d44\u6e90\u63a7\u5236\uff0c\u90a3\u4e48\u5c31\u8981\u5b9e\u73b0\u8be5\u5b50\u7cfb\u7edf\u5bf9\u5e94\u7684\u94a9\u5b50\u51fd\u6570\u3002\u8fd9\u4e2a\u5173\u7cfb\u4e0e\u865a\u62df\u6587\u4ef6\u7cfb\u7edf\u7c7b\u4f3c\uff0cVFS\u63d0\u4f9b\u7edf\u4e00\u7684\u7528\u6237\u63a5\u53e3\uff0c\u800c\u5177\u4f53\u7684\u6587\u4ef6\u64cd\u4f5c\u5219\u901a\u8fc7\u6587\u4ef6\u7cfb\u7edf\uff08\u6bd4\u5982ext3\uff09\u5bf9\u94a9\u5b50\u51fd\u6570\u7684\u5b9e\u73b0\u3002\u5177\u4f53\u5173\u7cfb\u5982\u4e0b\u56fe\uff1a<\/p>\n

\"cgroup_struct\"<\/a><\/p>\n

\u7531\u56fe\u53ef\u4ee5\u770b\u51fa\uff0ccgroup\u5728\u7528\u6237\u6001\u63d0\u4f9b\u7edf\u4e00\u7684\u7528\u6237\u63a5\u53e3\uff0c\u800c\u6bcf\u4e2a\u5b50\u7cfb\u7edf\u5bf9\u8d44\u6e90\u7684\u63a7\u5236\u529f\u80fd\u5219\u901a\u8fc7\u5176\u94a9\u5b50\u51fd\u6570\u5b9e\u73b0\u3002\u8fd9\u6837\u4f7f\u5f97cgroup\u5728\u4e0a\u5c42\u662f\u4e00\u4e2a\u7edf\u4e00\u7684\u6846\u67b6\uff0c\u800c\u4e0b\u5c42\u5219\u53ef\u4ee5\u5b9e\u73b0\u591a\u79cd\u8d44\u6e90\u7684\u63a7\u5236\u3002\u6bcf\u4e2a\u5b50\u7cfb\u7edf\u7684\u94a9\u5b50\u51fd\u6570\u5982\u4e0b:<\/p>\n

 \r\nstruct cgroup_subsys {\r\n        struct cgroup_subsys_state *(*css_alloc)(struct cgroup *cgrp);\r\n        int (*css_online)(struct cgroup *cgrp);\r\n        void (*css_offline)(struct cgroup *cgrp);\r\n        void (*css_free)(struct cgroup *cgrp);\r\n\r\n        int (*can_attach)(struct cgroup *cgrp, struct cgroup_taskset *tset);\r\n        void (*cancel_attach)(struct cgroup *cgrp, struct cgroup_taskset *tset);\r\n        void (*attach)(struct cgroup *cgrp, struct cgroup_taskset *tset);\r\n        void (*fork)(struct task_struct *task);\r\n        void (*exit)(struct cgroup *cgrp, struct cgroup *old_cgrp,\r\n                     struct task_struct *task);\r\n        void (*bind)(struct cgroup *root);\r\n        \u2026\u2026 \u2026\u2026\r\n}\r\n\r\n<\/pre>\n
3 cgroup\u6587\u4ef6\u7cfb\u7edf<\/h3>\n
cgroup\u5728Linux\u5185\u6838\u4e2d\u662f\u4ee5\u6587\u4ef6\u7cfb\u7edf\u7684\u5f62\u5f0f\u5b58\u5728\u7684\uff0c\u4e0d\u8fc7cgroup\u5bf9\u5e94\u7684\u8fd9\u79cd\u6587\u4ef6\u7cfb\u7edf\u4e0eproc\u6587\u4ef6\u7cfb\u7edf\u7c7b\u4f3c\uff0c\u90fd\u662f\u53ea\u5b58\u5728\u4e8e\u5185\u5b58\u4e2d\u7684\u201c\u865a\u62df\u201d\u6587\u4ef6\u7cfb\u7edf\u3002\u65e2\u7136\u5982\u6b64\uff0c\u5c31\u53ef\u4ee5\u901a\u8fc7mount\u547d\u4ee4\u521b\u5efa\u4e00\u4e2acgroup\u5b9e\u4f8b\u3002<\/p>\n
\r\n$ sudo mount -t cgroup -o memory memory_cgroup \/dev\/cgroup\/\r\n<\/pre>\n
\u5373\u5728\/dev\/cgroup\/\u4e0b\u521b\u5efa\u4e86\u4e00\u4e2amemory\u5b50\u7cfb\u7edf\u3002\u63a5\u4e0b\u6765\u5c31\u53ef\u4ee5\u901a\u8fc7\uff1a<\/p>\n
\r\n$ cat \/proc\/filesystems | grep cgroup\r\n<\/pre>\n
\u53ef\u770b\u5230\u7cfb\u7edf\u6709\u4e86cgroup\u7c7b\u578b\u7684\u6587\u4ef6\u7cfb\u7edf\u3002<\/p>\n
\u5f53\u521b\u5efa\u4e86\u4e00\u4e2acgroup\u5b9e\u4f8b\u540e\uff0c\u5bf9\u5e94\u7684\u6302\u8f7d\u70b9\u4e0b\u4f1a\u6709\u4e00\u4e9b\u6587\u4ef6\uff0c\u8fd9\u4e9b\u6587\u4ef6\u662f\u7528\u6237\u4e0ecgroup\u8fdb\u884c\u4ea4\u4e92\u7684\u63a5\u53e3\u3002\u7531\u4e8ecgroup\u4f4d\u4e8eVFS\u5c42\u4e4b\u4e0b\uff0c\u56e0\u6b64\u7528\u6237\u53ef\u4ee5\u901a\u8fc7\u7edf\u4e00\u7684\u6587\u4ef6\u64cd\u4f5c\u63a5\u53e3\u53bb\u8bfb\u53d6\u6216\u8bbe\u7f6e\u5b50\u7cfb\u7edf\u7684\u53c2\u6570\uff0c\u5f53\u7136\u4e5f\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528echo\u6216\u8005cat\u7b49\u547d\u4ee4\u3002<\/p>\n
\u53c2\u8003:<\/p>\n
1.Linux\u5185\u6838\u6587\u6863:<\/p>\n
https:\/\/www.kernel.org\/doc\/Documentation\/cgroups\/cgroups.txt<\/p>\n","protected":false},"excerpt":{"rendered":"
Cgroup\uff08Control Groups\uff09\u662f\u8fd9\u6837\u4e00\u79cd\u673a\u5236\uff1a\u5b83\u4ee5\u5206\u7ec4\u7684\u5f62\u5f0f\u5bf9\u8fdb\u7a0b\u4f7f\u7528\u7cfb\u7edf\u8d44\u6e90\u7684\u884c\u4e3a\u8fdb\u884c\u7ba1\u7406\u548c\u63a7 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[372],"tags":[373,408,374],"class_list":["post-4314","post","type-post","status-publish","format-standard","hentry","category-372","tag-cgroup","tag-408","tag-374"],"views":15587,"_links":{"self":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/4314","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/comments?post=4314"}],"version-history":[{"count":6,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/4314\/revisions"}],"predecessor-version":[{"id":4334,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/4314\/revisions\/4334"}],"wp:attachment":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/media?parent=4314"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/categories?post=4314"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/tags?post=4314"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}