{"id":3949,"date":"2025-07-20T11:12:27","date_gmt":"2025-07-20T03:12:27","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=3949"},"modified":"2025-07-20T11:12:27","modified_gmt":"2025-07-20T03:12:27","slug":"%e5%9c%a8%e9%ab%98%e5%b9%b6%e5%8f%91%e4%b8%8b-clh-%e8%af%bb%e5%86%99%e9%94%81%e6%98%af%e5%90%a6%e4%bc%9a%e5%af%bc%e8%87%b4%e6%80%a7%e8%83%bd%e7%93%b6%e9%a2%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/07\/20\/%e5%9c%a8%e9%ab%98%e5%b9%b6%e5%8f%91%e4%b8%8b-clh-%e8%af%bb%e5%86%99%e9%94%81%e6%98%af%e5%90%a6%e4%bc%9a%e5%af%bc%e8%87%b4%e6%80%a7%e8%83%bd%e7%93%b6%e9%a2%88%ef%bc%9f\/","title":{"rendered":"\u5728\u9ad8\u5e76\u53d1\u4e0b CLH + \u8bfb\u5199\u9501\u662f\u5426\u4f1a\u5bfc\u81f4\u6027\u80fd\u74f6\u9888\uff1f"},"content":{"rendered":"\n<p>\u5728\u9ad8\u5e76\u53d1\u73af\u5883\u4e0b\uff0cCLH \u961f\u5217\u7ed3\u5408\u8bfb\u5199\u9501\uff08\u5982 Java \u4e2d\u7684 <code>ReentrantReadWriteLock<\/code>\uff09\u786e\u5b9e\u53ef\u80fd\u51fa\u73b0\u6027\u80fd\u74f6\u9888\uff0c\u5177\u4f53\u539f\u56e0\u3001\u8868\u73b0\u53ca\u4f18\u5316\u624b\u6bb5\u5982\u4e0b\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u80cc\u666f\u56de\u987e<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>CLH \u961f\u5217<\/strong> \u662f\u4e00\u79cd\u57fa\u4e8e\u94fe\u8868\u7684\u81ea\u65cb\u9501\u961f\u5217\uff0c\u4fdd\u8bc1\u8bf7\u6c42\u9501\u7ebf\u7a0b\u7684\u516c\u5e73\u6392\u961f\u3002<\/li>\n\n\n\n<li><strong>\u8bfb\u5199\u9501\uff08ReadWriteLock\uff09<\/strong> \u652f\u6301\u591a\u8bfb\u5355\u5199\u6a21\u5f0f\uff0c\u63d0\u9ad8\u8bfb\u591a\u5199\u5c11\u573a\u666f\u7684\u5e76\u53d1\u6027\u80fd\u3002<\/li>\n\n\n\n<li>Java \u7684 <code>ReentrantReadWriteLock<\/code> \u5e95\u5c42\u57fa\u4e8e <code>AbstractQueuedSynchronizer<\/code>\uff08AQS\uff09\uff0c\u7528 CLH \u961f\u5217\u7ba1\u7406\u7ebf\u7a0b\u7b49\u5f85\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u6027\u80fd\u74f6\u9888\u7684\u5178\u578b\u8868\u73b0<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. <strong>\u5199\u9501\u9965\u997f\uff08Writer starvation\uff09<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u8bfb\u7ebf\u7a0b\u6301\u7eed\u4e0d\u65ad\u5730\u83b7\u53d6\u8bfb\u9501\uff0c\u5199\u7ebf\u7a0b\u53ef\u80fd\u957f\u65f6\u95f4\u65e0\u6cd5\u83b7\u5f97\u9501\uff0c\u9020\u6210\u5199\u9501\u9965\u997f\u3002<\/li>\n\n\n\n<li>CLH \u961f\u5217\u672c\u8eab\u662f FIFO\uff0c\u4f46 <code>ReentrantReadWriteLock<\/code> \u7684\u975e\u516c\u5e73\u5b9e\u73b0\u53ef\u80fd\u5bfc\u81f4\u5199\u7ebf\u7a0b\u88ab\u201c\u63d2\u961f\u201d\u8bfb\u7ebf\u7a0b\u6301\u7eed\u5ef6\u540e\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. <strong>\u5199\u9501\u7ade\u4e89\u52a0\u5267<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5199\u9501\u662f\u72ec\u5360\u7684\uff0c\u6240\u6709\u5199\u8bf7\u6c42\u9700\u8981\u6392\u961f\u7b49\u5f85\uff0c\u5199\u7ebf\u7a0b\u589e\u591a\u65f6\uff0c\u4f1a\u51fa\u73b0\u5927\u91cf\u7ebf\u7a0b\u963b\u585e\uff0cCLH \u961f\u5217\u53d8\u957f\u3002<\/li>\n\n\n\n<li>\u7ebf\u7a0b\u9891\u7e41\u5207\u6362\u548c\u4e0a\u4e0b\u6587\u5207\u6362\u5f00\u9500\u52a0\u5927\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. <strong>\u8bfb\u9501\u5347\u7ea7\u95ee\u9898<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>ReentrantReadWriteLock<\/code> \u4e0d\u652f\u6301\u4ece\u8bfb\u9501\u76f4\u63a5\u5347\u7ea7\u5230\u5199\u9501\uff0c\u82e5\u4e1a\u52a1\u8bbe\u8ba1\u4e0d\u5408\u7406\uff0c\u9891\u7e41\u91ca\u653e\u8bfb\u9501\u518d\u83b7\u53d6\u5199\u9501\uff0c\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4. <strong>\u8bfb\u5199\u9501\u7684\u9501\u964d\u7ea7\u5f00\u9500<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5199\u9501\u964d\u7ea7\u4e3a\u8bfb\u9501\u65f6\uff0c\u867d\u7136\u51cf\u5c11\u4e86\u5199\u9501\u6301\u6709\u65f6\u95f4\uff0c\u4f46\u5728\u9ad8\u5e76\u53d1\u4e2d\u4f9d\u7136\u5b58\u5728\u7ade\u4e89\u548c\u8c03\u5ea6\u5f00\u9500\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001\u5bfc\u81f4\u74f6\u9888\u7684\u6839\u672c\u539f\u56e0<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u539f\u56e0<\/th><th>\u8bf4\u660e<\/th><\/tr><\/thead><tbody><tr><td>\u7ebf\u7a0b\u4e0a\u4e0b\u6587\u5207\u6362<\/td><td>\u961f\u5217\u957f\u5bfc\u81f4\u7ebf\u7a0b\u9891\u7e41\u963b\u585e\u5524\u9192\uff0c\u5207\u6362\u6210\u672c\u9ad8<\/td><\/tr><tr><td>\u9501\u7c92\u5ea6\u8fc7\u7c97<\/td><td>\u5355\u4e2a\u8bfb\u5199\u9501\u4fdd\u62a4\u5927\u91cf\u5171\u4eab\u8d44\u6e90\uff0c\u5bfc\u81f4\u7ade\u4e89\u6fc0\u70c8<\/td><\/tr><tr><td>\u8bfb\u5199\u9501\u975e\u516c\u5e73\u7b56\u7565<\/td><td>\u8bfb\u7ebf\u7a0b\u63d2\u961f\u5199\u7ebf\u7a0b\uff0c\u5199\u7ebf\u7a0b\u957f\u65f6\u95f4\u7b49\u5f85<\/td><\/tr><tr><td>\u8bfb\u5199\u9501\u4e0d\u652f\u6301\u5347\u7ea7<\/td><td>\u590d\u6742\u4e1a\u52a1\u5bfc\u81f4\u9501\u83b7\u53d6\u6d41\u7a0b\u7e41\u7410<\/td><\/tr><tr><td>JVM\u8c03\u5ea6\u548c\u786c\u4ef6\u5185\u5b58\u67b6\u6784\u74f6\u9888<\/td><td>\u7f13\u5b58\u540c\u6b65\u3001CPU\u8c03\u5ea6\u7b49\u786c\u4ef6\u5c42\u9762\u9650\u5236<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001\u4f18\u5316\u5efa\u8bae\u4e0e\u65b9\u6848<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. <strong>\u4f7f\u7528\u516c\u5e73\u9501<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6784\u9020 <code>ReentrantReadWriteLock(true)<\/code> \u5f00\u542f\u516c\u5e73\u6a21\u5f0f\uff0c\u51cf\u5c11\u5199\u9501\u9965\u997f\u95ee\u9898\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>ReadWriteLock lock = new ReentrantReadWriteLock(true);<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u516c\u5e73\u9501\u53ef\u80fd\u7565\u5fae\u964d\u4f4e\u541e\u5410\u91cf\uff0c\u4f46\u63d0\u5347\u5199\u7ebf\u7a0b\u54cd\u5e94\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. <strong>\u51cf\u5c0f\u9501\u7c92\u5ea6<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e1a\u52a1\u903b\u8f91\u62c6\u5206\uff0c\u4f7f\u7528\u591a\u628a\u8bfb\u5199\u9501\u6216\u5206\u6bb5\u9501\uff08\u5982\u5206\u6bb5\u54c8\u5e0c\u8868\uff09\u964d\u4f4e\u7ade\u4e89\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. <strong>\u4f7f\u7528\u4e50\u89c2\u9501\u6216\u65e0\u9501\u8bbe\u8ba1<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>StampedLock<\/code> \u63d0\u4f9b\u4e50\u89c2\u8bfb\u9501\uff0c\u8bfb\u65f6\u65e0\u9501\u7ade\u4e89\uff0c\u5199\u65f6\u963b\u585e\u3002<\/li>\n\n\n\n<li>\u9002\u5408\u8bfb\u591a\u5199\u5c11\u573a\u666f\uff0c\u80fd\u663e\u8457\u63d0\u9ad8\u5e76\u53d1\u6027\u80fd\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>StampedLock stampedLock = new StampedLock();\nlong stamp = stampedLock.tryOptimisticRead();\ntry {\n    \/\/ \u8bfb\u64cd\u4f5c\n} finally {\n    if (!stampedLock.validate(stamp)) {\n        stamp = stampedLock.readLock();\n        try {\n            \/\/ \u8bfb\u64cd\u4f5c\n        } finally {\n            stampedLock.unlockRead(stamp);\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">4. <strong>\u907f\u514d\u8bfb\u9501\u5347\u7ea7\u4e3a\u5199\u9501<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8bbe\u8ba1\u4e1a\u52a1\u6d41\u7a0b\uff0c\u907f\u514d\u9891\u7e41\u7684\u8bfb\u9501\u91ca\u653e\u540e\u5199\u9501\u83b7\u53d6\uff0c\u51cf\u5c11\u9501\u8f6c\u6362\u5f00\u9500\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">5. <strong>\u51cf\u5c11\u6301\u9501\u65f6\u95f4<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53ea\u5728\u5fc5\u8981\u4ee3\u7801\u5757\u52a0\u9501\uff0c\u907f\u514d\u957f\u65f6\u95f4\u5360\u7528\u9501\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">6. <strong>\u7ebf\u7a0b\u6c60\u4e0e\u8d44\u6e90\u63a7\u5236<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9650\u5236\u7ebf\u7a0b\u6c60\u6700\u5927\u7ebf\u7a0b\u6570\uff0c\u51cf\u5c11\u8fc7\u591a\u7ebf\u7a0b\u7ade\u4e89\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">7. <strong>\u76d1\u63a7\u548c\u8bca\u65ad<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u7528\u5de5\u5177\uff08<code>jstack<\/code>\u3001<code>Arthas<\/code>\u3001<code>JFR<\/code>\uff09\u76d1\u63a7\u9501\u7b49\u5f85\u3001\u963b\u585e\u7ebf\u7a0b\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e94\u3001\u7ed3\u8bba<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u89c2\u70b9<\/th><th>\u8bf4\u660e<\/th><\/tr><\/thead><tbody><tr><td>CLH + \u8bfb\u5199\u9501\u8bbe\u8ba1\u5408\u7406\u65f6\u6027\u80fd\u597d<\/td><td>\u9002\u5408\u4e2d\u4f4e\u5e76\u53d1\u6216\u8bfb\u591a\u5199\u5c11\u573a\u666f<\/td><\/tr><tr><td>\u9ad8\u5e76\u53d1\u5199\u5bc6\u96c6\u573a\u666f\u74f6\u9888\u660e\u663e<\/td><td>\u5199\u7ebf\u7a0b\u963b\u585e\u957f\u3001\u9965\u997f\u73b0\u8c61\u52a0\u5267<\/td><\/tr><tr><td>\u9700\u7ed3\u5408\u516c\u5e73\u7b56\u7565\u548c\u9501\u7c92\u5ea6\u4f18\u5316<\/td><td>\u53ef\u6709\u6548\u7f13\u89e3\u6027\u80fd\u74f6\u9888<\/td><\/tr><tr><td>\u63a8\u8350\u7ed3\u5408\u4e50\u89c2\u9501\u6216\u65e0\u9501\u65b9\u6848<\/td><td><code>StampedLock<\/code> \u662f\u66f4\u73b0\u4ee3\u9ad8\u6027\u80fd\u66ff\u4ee3\u65b9\u6848<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u516d\u3001\u6743\u5a01\u8d44\u6599\u4e0e\u6e90\u7801\u53c2\u8003<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/github.com\/openjdk\/jdk\/blob\/master\/src\/java.base\/share\/classes\/java\/util\/concurrent\/locks\/ReentrantReadWriteLock.java\">OpenJDK ReentrantReadWriteLock \u6e90\u7801<\/a><\/li>\n\n\n\n<li>\u300aJava Concurrency in Practice\u300b Chapter 14<\/li>\n\n\n\n<li>\u300aJava\u5e76\u53d1\u7f16\u7a0b\u5b9e\u6218\u300b \u2014 \u8bfb\u5199\u9501\u76f8\u5173\u7ae0\u8282<\/li>\n\n\n\n<li><a href=\"https:\/\/docs.oracle.com\/javase\/8\/docs\/api\/java\/util\/concurrent\/locks\/StampedLock.html\">StampedLock \u4ecb\u7ecd<\/a><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u9ad8\u5e76\u53d1\u73af\u5883\u4e0b\uff0cCLH \u961f\u5217\u7ed3\u5408\u8bfb\u5199\u9501\uff08\u5982 Java \u4e2d\u7684 ReentrantReadWriteLock\uff09\u786e\u5b9e [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3950,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86,68],"tags":[],"class_list":["post-3949","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java-","category-java"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3949","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=3949"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3949\/revisions"}],"predecessor-version":[{"id":3951,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3949\/revisions\/3951"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media\/3950"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=3949"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=3949"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=3949"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}