{"id":10007978,"date":"2023-06-24T23:01:09","date_gmt":"2023-06-24T15:01:09","guid":{"rendered":"https:\/\/ityet.com\/?p=10007978"},"modified":"2023-06-24T23:01:09","modified_gmt":"2023-06-24T15:01:09","slug":"%e4%bd%a0%e7%9a%84go%e5%ba%94%e7%94%a8%e7%9c%9f%e7%9a%84%e7%94%a8%e4%ba%86%e6%ad%a3%e7%a1%ae%e7%9a%84-cpu-%e6%a0%b8%e6%95%b0%e5%90%97%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10007978","title":{"rendered":"\u4f60\u7684Go\u5e94\u7528\u771f\u7684\u7528\u4e86\u6b63\u786e\u7684 CPU \u6838\u6570\u5417\uff1f"},"content":{"rendered":"

Go \u7684\u8c03\u5ea6\u6a21\u578b\u662f GMP\uff0c\u5176\u4e2d G \u662f goroutine\uff0cM \u662f\u7ebf\u7a0b\uff0cP \u662f\u53ef\u7528\u7684 CPU \u6838\u6570\u3002\u591a\u4e2a G \u4f1a\u5171\u7528\u4e00\u4e2a M\u3002M \u4f5c\u4e3a\u64cd\u4f5c\u7cfb\u7edf\u5c42\u9762\u4e0a\u7684\u8c03\u5ea6\u5355\u4f4d\uff0c\u5728\u6267\u884c\u65f6\u9700\u8981\u7ed1\u5b9a\u5230 P\u3002\u5982\u679c\u64cd\u4f5c\u7cfb\u7edf\u8ba4\u4e3a\u7684\u67d0\u4e2a Go \u8fdb\u7a0b\u53ef\u7528\u7684 CPU \u6570\uff0c\u548c\u8be5\u8fdb\u7a0b\u8ba4\u4e3a\u7684\u53ef\u7528\u7684 CPU \u6570\u4e0d\u4e00\u81f4\uff0c\u90a3\u4e48\u5373\u4f7f\u628a M \u7ed1\u5b9a\u5230\u67d0\u4e2a P \u4e0a\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4e5f\u4e0d\u4e00\u5b9a\u4f1a\u6267\u884c\u8fd9\u4e2a\u7ebf\u7a0b\u3002\u6240\u4ee5\u80fd\u5426\u83b7\u53d6\u51c6\u786e\u7684\u53ef\u7528 CPU \u6838\u6570\u4f1a\u5f71\u54cd Go \u7684\u8c03\u5ea6\u6548\u7387\u3002<\/p>\n

\u5f53\u7528\u6237\u5728 k8s \u4e2d\u8bbe\u7f6e\u4e86\u8d44\u6e90\u9650\u5236\uff1a<\/p>\n

spec:\n  containers:\n  - name: app_written_by_go\n    resources:\n      limits:\n        cpu: "4"<\/code><\/pre>\n
Go \u4f1a\u4e0d\u4f1a\u8bc6\u522b\u5230\u53ef\u7528\u7684 CPU \u4e3a 4 \u5462\uff1f\u8bfb\u8005\u53ef\u80fd\u4f1a\u8ba4\u4e3a\uff0cGo \u4f5c\u4e3a\u4e00\u4e2a\u4e91\u539f\u751f\u65f6\u4ee3\u7099\u624b\u53ef\u70ed\u7684\u8bed\u8a00\uff0c\u5e94\u8be5\u5185\u7f6e\u4e86\u5bf9 k8s \u7684\u652f\u6301\uff0c\u6240\u4ee5\u80fd\u591f\u8bc6\u522b\u51fa\u6765\u3002\u4f46\u4e8b\u5b9e\u5e76\u975e\u5982\u6b64\u3002\u6211\u4eec\u53ef\u4ee5\u505a\u4e2a\u5c0f\u5b9e\u9a8c\uff1a
\u5982\u679c\u542f\u52a8 Go \u8fdb\u7a0b\u65f6\u6ca1\u6709\u6307\u5b9a GOMAXPROCS \u73af\u5883\u53d8\u91cf\uff0c\u90a3\u4e48\u4f1a\u4ee5 runtime.NumCPU()<\/code> \u7684\u8f93\u51fa\u4f5c\u4e3a\u53ef\u7528\u7684 CPU \u6838\u6570\uff08\u4e5f\u5373 P \u7684\u503c\uff09\u3002\u8ba9\u6211\u4eec\u52a0\u4e00\u4e0b\u6253\u5370 NumCPU \u7684\u4ee3\u7801\uff0c\u4f1a\u53d1\u73b0\u5b9e\u9645\u4e0a\u8f93\u51fa\u7684\u662f Node \u4e0a\u7684 CPU \u6570\u76ee\uff0c\u8ddf limits.cpu<\/code> \u65e0\u5173\u3002<\/p>\n
runtime.NumCPU()<\/code> \u5728 Linux \u4e0a\u662f\u901a\u8fc7\u7cfb\u7edf\u8c03\u7528 sched_getaffinity<\/code> \u5b9e\u73b0\u7684\uff0c\u4f46\u8fd9\u4e2a\u7cfb\u7edf\u8c03\u7528\u53ea\u8003\u8651\u7ed1\u5b9a CPU \u6838\u7684\u60c5\u51b5\uff0c\u4e0d\u6d89\u53ca\u5bb9\u5668\u73af\u5883\u4e0b cgroup \u5bf9 CPU \u8d44\u6e90\u7684\u9650\u5236\u3002\u4ee5 docker \u4e3a\u4f8b\uff0cdocker run \u65f6\u6307\u5b9a --cpuset-cpus<\/code> \u53ef\u4ee5\u8bbe\u7f6e\u5bb9\u5668\u8fd0\u884c\u65f6\u53ef\u4ee5\u4f7f\u7528\u7684 CPU \u6838\u7684\u7f16\u53f7\uff0c\u4f46\u9650\u5236 CPU \u7684\u8d44\u6e90\u6570\u4e3b\u8981\u7528 --cpus=<\/code>\u3002\u53ea\u6709\u524d\u8005\uff08cpuset\uff09\u662f\u80fd\u88ab sched_getaffinity<\/code> \u8bc6\u522b\u7684\u3002\u5177\u4f53\u89c1 https:\/\/docs.docker.com\/config\/containers\/resource_constraint…<\/a>\u3002\u5982\u679c\u8981\u60f3\u8ba1\u7b97\u540e\u8005\uff0c\u90a3\u4e48\u9700\u8981\u8bfb\u53d6\u673a\u5668\u4e0a\u7684 cgroup fs \u6587\u4ef6\u3002<\/p>\n
\u6709\u4e00\u4e2a Go \u5e93\u652f\u6301\u8bfb\u53d6 cgroup fs \u5e76\u8ba1\u7b97\u51fa\u51c6\u786e\u7684 GOMAXPROCS\uff1a
https:\/\/github.com\/uber-go\/automaxprocs<\/a>
\u5b83\u652f\u6301\u4e24\u79cd\u4e0d\u540c\u7684 cgroup fs \uff08cgroup v1 \u548c v2\uff09\uff1a
\u5176\u4e2d v1 \u662f\u8bfb\u53d6\u6587\u4ef6 cpu.cfs_quota_us<\/code> \u548c cpu.cfs_period_us<\/code>\uff0c\u5e76\u6c42\u4e24\u8005\u7684\u5546\u3002\u8fd9\u4e24\u4e2a\u6587\u4ef6\u901a\u5e38\u4f4d\u4e8e \/sys\/fs\/cgroup\/cpu\/ \u4e0b\u9762\uff08automaxprocs \u4f1a\u8bfb\u6302\u8f7d\u4fe1\u606f\u6765\u83b7\u53d6\u5b9e\u9645\u4f4d\u7f6e\uff09\u3002v2 \u5219\u662f\u8bfb\u53d6\u6587\u4ef6 cpu.max<\/code> \u91cc\u9762\u5bf9\u5e94\u8868\u793a quota \u548c period \u7684\u5b57\u6bb5\uff0c\u5e76\u6c42\u4e24\u8005\u7684\u5546\u3002\u9664\u6cd5\u7684\u7ed3\u679c\u4e0d\u4e00\u5b9a\u662f\u6574\u6570\uff0c\u6240\u4ee5\u8fd8\u6709\u4e00\u4e2a\u5411\u4e0b\u53d6\u6574\u7684\u8fc7\u7a0b\u3002<\/p>\n
\u5b58\u5728\u201c\u5e94\u8be5\u80fd\u591f\u8bc6\u522b\u53ef\u7528 CPU \u6570\u4f46\u5728\u5bb9\u5668\u73af\u5883\u4e0b\u5b9e\u9645\u529e\u4e0d\u5230\u201d\u8fd9\u79cd\u95ee\u9898\u7684\u5e76\u4e0d\u53ea\u6709 Go \u4e00\u4e2a\u3002Nginx \/ Envoy \u4e5f\u6709\u65e0\u6cd5\u8bc6\u522b cgroup \u914d\u7f6e\u7684\u95ee\u9898\u3002\u636e\u8bf4 Rust \u548c Java \uff08OpenJDK \u5b9e\u73b0\uff09\u6709\u4e13\u95e8\u5904\u7406\u8fc7 cgroup \u914d\u7f6e\u3002\u5982\u679c\u4f60\u7684\u5e94\u7528\u7b26\u5408\u4e0b\u9762\u4e24\u70b9\uff1a<\/p>\n
    \n
  1. \u8ba1\u7b97\u5bc6\u96c6\u578b\u6216\u4e3b\u8981\u4e1a\u52a1\u903b\u8f91\u5728\u82e5\u5e72\u4e2a\u56fa\u5b9a\u7684 worker \u4e2d\u5b8c\u6210<\/li>\n
  2. \u4f1a\u90e8\u7f72\u5230\u5bb9\u5668\u73af\u5883\u4e2d
    \u90a3\u4e48\u4e0d\u59a8\u770b\u770b\u6240\u7528\u7684\u6846\u67b6\u662f\u5426\u80fd\u6b63\u786e\u5904\u7406 cgroup \u914d\u7f6e\u3002<\/li>\n<\/ol>\n
    \u9644\u6ce8\uff1aIBM \u7684\u5458\u5de5\u66fe\u7ecf\u63d0\u8fc7\u4e00\u4e2a CPU Namespace \u7684\u8bbe\u8ba1\uff0c\u5c01\u88c5\u6bcf\u4e2a\u8fdb\u7a0b\u53ef\u4ee5\u770b\u5f97\u5230\u7684 CPU \u4fe1\u606f\uff0c\u907f\u514d\u8bf8\u5982 CPU \u5206\u914d\u4e0d\u4e00\u81f4\u8fd9\u6837\u7684\u201c\u62bd\u8c61\u6cc4\u6f0f\u201d\u3002\u4e0d\u8fc7\u540e\u7eed\u5c31\u6ca1\u6709\u4e0b\u6587\u4e86\u3002<\/p>\n
    https:\/\/segmentfault.com\/a\/1190000043930543<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
    Go \u7684\u8c03\u5ea6\u6a21\u578b\u662f GMP\uff0c\u5176\u4e2d G \u662f goroutine\uff0cM \u662f\u7ebf\u7a0b\uff0cP \u662f\u53ef\u7528\u7684 CPU \u6838\u6570\u3002\u591a\u4e2a G […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10007978","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10007978","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10007978"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10007978\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10007978"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10007978"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10007978"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}