{"id":207443,"date":"2025-07-08T11:56:51","date_gmt":"2025-07-08T03:56:51","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207443\/"},"modified":"2025-07-08T11:56:51","modified_gmt":"2025-07-08T03:56:51","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88-goroutine-%e6%97%a0%e6%b3%95%e8%af%bb%e5%8f%96%e5%85%a8%e5%b1%80-var-ops-%e5%80%bc%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207443\/","title":{"rendered":"\u4e3a\u4ec0\u4e48 goroutine \u65e0\u6cd5\u8bfb\u53d6\u5168\u5c40 var ops \u503c\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u4e3a\u4ec0\u4e48 goroutine \u65e0\u6cd5\u8bfb\u53d6\u5168\u5c40 var ops \u503c\uff1f<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-22 17:33:39<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5077\u5077\u52aa\u529b\uff0c\u6084\u65e0\u58f0\u606f\u5730\u53d8\u5f3a\uff0c\u7136\u540e\u60ca\u8273\u6240\u6709\u4eba\uff01\u54c8\u54c8\uff0c\u5c0f\u4f19\u4f34\u4eec\u53c8\u6765\u5b66\u4e60\u5566~\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u300a\u4e3a\u4ec0\u4e48 goroutine \u65e0\u6cd5\u8bfb\u53d6\u5168\u5c40 var ops \u503c\uff1f\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u4e0d\u77e5\u9053\u5927\u5bb6\u5bf9\u5176\u90fd\u6709\u591a\u5c11\u4e86\u89e3\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u4e00\u8d77\u6765\u770b\u4e00\u5427\uff01\u5f53\u7136\uff0c\u975e\u5e38\u5e0c\u671b\u5927\u5bb6\u80fd\u591a\u591a\u8bc4\u8bba\uff0c\u7ed9\u51fa\u5408\u7406\u7684\u5efa\u8bae\uff0c\u6211\u4eec\u4e00\u8d77\u5b66\u4e60\uff0c\u4e00\u8d77\u8fdb\u6b65\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

package main\n\nimport \"fmt\"\nimport \"time\"\nimport (\n    \"runtime\"\n    \"sync\/atomic\"\n)\n\nfunc init() {\n    runtime.GOMAXPROCS(runtime.NumCPU())\n}\n\nfunc main() {\n    var t1 = time.Now()\n    var ops uint64 = 0\n    go func() {\n        for {\n            time.Sleep(time.Second)\n            opsFinal := atomic.LoadUint64(&ops)\n            fmt.Println(\"ops:\", opsFinal, \"qps:\", opsFinal\/uint64(time.Since(t1).Seconds()))\n        }\n    }()\n\n    for {\n        atomic.AddUint64(&ops, 1)\n        \/\/runtime.Gosched()\n    }\n}<\/pre>\n
\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6bcf\u79d2\u90fd\u4f1a\u8f93\u51fa\u201cops: 0 qps: 0\u201d\uff0c\u4e3a\u4ec0\u4e48\u65e0\u6cd5\u8bfb\u53d6 goroutine \u4e2d\u7684 ops\uff1f<\/p>\n
\u4f46\u662f\u5f53\u6dfb\u52a0runtime.gosched()<\/strong>\u65f6\uff0c\u4e00\u5207\u6b63\u5e38\uff01<\/p>\n
\u6bcf\u4e2a\u4eba\u90fd\u53ef\u4ee5\u5e2e\u52a9\u6211\u5417\uff1f<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u6211\u5bf9 \u7684\u7406\u89e3\u662f\uff0c\u8fd9\u662f\u60a8\u7f16\u5199\u7684\u7a0b\u5e8f\u7684\u6b63\u786e\u6267\u884c\uff1a\u6ca1\u6709\u4efb\u4f55\u4e1c\u897f\u53ef\u4ee5\u4fdd\u8bc1\u4e3b\u7a0b\u5e8f\u4e2d\u7684 adduint64()<\/code> \u8c03\u7528\u53d1\u751f\u5728<\/em> loaduint64()<\/code> \u8c03\u7528\u4e4b\u524d\u5728 goroutine \u4e2d\uff0c\u56e0\u6b64\u5728\u4efb\u4f55\u5199\u5165\u53d1\u751f\u4e4b\u524d\u53d1\u751f\u53d8\u91cf\u7684\u6bcf\u6b21\u8bfb\u53d6\u90fd\u662f\u5408\u6cd5\u7684\u3002\u5982\u679c\u7f16\u8bd1\u5668\u77e5\u9053 \"sync\/atomic\"<\/code> \u662f\u7279\u6b8a\u7684\uff0c\u5e76\u5f97\u51fa\u7ed3\u8bba\u589e\u91cf\u7684\u7ed3\u679c\u662f\u4e0d\u53ef\u89c2\u5bdf\u7684\uff0c\u56e0\u6b64\u53ea\u9700\u5220\u9664\u6700\u540e\u4e00\u4e2a\u5faa\u73af\uff0c\u6211\u5c31\u4e0d\u4f1a\u611f\u5230\u5b8c\u5168\u9707\u60ca\u3002<\/p>\n
 \u548c \u90fd\u5efa\u8bae\u4e0d\u8981\u4f7f\u7528\u60a8\u6b63\u5728\u4f7f\u7528\u7684\u65b9\u6cd5\u3002 \"sync\/atomic\"<\/code> \u544a\u8beb\uff1a<\/p>\n
\u901a\u8fc7\u901a\u4fe1\u5171\u4eab\u5185\u5b58\uff1b\u4e0d\u8981\u901a\u8fc7\u5171\u4eab\u5185\u5b58\u8fdb\u884c\u901a\u4fe1\u3002<\/p>\n
\u66f4\u597d\u7684\u7a0b\u5e8f\u53ef\u80fd\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
package main\n\nimport \"fmt\"\nimport \"time\"\n\nfunc count(op <-chan struct{}) {\n    t1 := time.now()\n    ops := 0\n    tick := time.tick(time.second)\n    for {\n        select {\n        case <-op:\n            ops++\n        case <-tick:\n            dt := time.since(t1).seconds()\n            fmt.printf(\"ops: %d qps: %f\\n\", ops, float64(ops)\/dt)\n        }\n    }\n}\n\nfunc main() {\n    op := make(chan struct{})\n    go count(op)\n    for {\n        op <- struct{}{}\n    }\n}<\/pre>\n
\u8bf7\u6ce8\u610f\uff0c\u9664\u4e86\u901a\u8fc7\u901a\u9053\u53d1\u9001\u7684\u6570\u636e\u4e4b\u5916\uff0c\u4e3b\u7a0b\u5e8f\u548c goroutine \u4e4b\u95f4\u4e0d\u5171\u4eab\u4efb\u4f55\u72b6\u6001\u3002<\/p>\n
\u6211\u4f1a\u66f4\u65b0 go \u7248\u672c\uff0c\u8bf7\u68c0\u67e5\uff0c<\/p>\n
[mh-cbon@pc3 y] $ go run main.go \nops: 97465383 qps: 97465383\nops: 195722110 qps: 97861055\nops: 293058057 qps: 97686019\nops: 390971243 qps: 97742810\n^Csignal: interrupt\n[mh-cbon@pc3 y] $ go version\ngo version go1.10 linux\/amd64\n[mh-cbon@pc3 y] $ gvm use 1.8\nNow using version go1.8\n[mh-cbon@pc3 y] $ go version\ngo version go1.8 linux\/amd64\n[mh-cbon@pc3 y] $ go run main.go \nops: 0 qps: 0\nops: 0 qps: 0\n^Csignal: interrupt\n[mh-cbon@pc3 y] $<\/pre>\n
\u672c\u7bc7\u5173\u4e8e\u300a\u4e3a\u4ec0\u4e48 goroutine \u65e0\u6cd5\u8bfb\u53d6\u5168\u5c40 var ops \u503c\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8eGolang\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207443","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207443","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207443"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207443\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207443"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207443"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207443"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}