{"id":3515,"date":"2019-06-25T18:06:40","date_gmt":"2019-06-25T10:06:40","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=3515"},"modified":"2019-06-25T18:06:40","modified_gmt":"2019-06-25T10:06:40","slug":"%e8%ae%a1%e7%ae%97%e6%9c%ba%e5%ba%95%e5%b1%82%e7%9f%a5%e8%af%86%e6%8b%be%e9%81%97%ef%bc%88%e4%b8%80%ef%bc%89%e7%90%86%e8%a7%a3%e8%99%9a%e6%8b%9f%e5%86%85%e5%ad%98%e6%9c%ba%e5%88%b6","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/3515","title":{"rendered":"\u8ba1\u7b97\u673a\u5e95\u5c42\u77e5\u8bc6\u62fe\u9057\uff08\u4e00\uff09\u7406\u89e3\u865a\u62df\u5185\u5b58\u673a\u5236"},"content":{"rendered":"<div class=\"article-header-box\">\n<div class=\"article-header\">\n<div class=\"article-title-box\"><\/div>\n<div class=\"article-info-box\">\n<div class=\"article-bar-top\">\n<div class=\"tags-box space\"><a href=\"https:\/\/blog.csdn.net\/iter_zc\/article\/details\/42644229\">\u539f\u6587\u5730\u5740<\/a><\/div>\n<\/div>\n<div class=\"operating\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<article class=\"baidu_pl\">\n<div id=\"article_content\" class=\"article_content clearfix csdn-tracking-statistics\" data-pid=\"blog\" data-mod=\"popu_307\" data-dsm=\"post\">\n<div id=\"content_views\" class=\"htmledit_views\">\n<p>\u8fd9\u4e2a\u7cfb\u5217\u4f1a\u603b\u7ed3\u8ba1\u7b97\u673a\uff0c\u7f51\u7edc\u76f8\u5173\u7684\u4e00\u4e9b\u91cd\u8981\u7684\u5e95\u5c42\u539f\u7406\u3002\u5f88\u591a\u5e95\u5c42\u539f\u7406\u5927\u5bb6\u4e0a\u5b66\u7684\u65f6\u5019\u90fd\u5b66\u8fc7\uff0c\u4f46\u662f\u5728\u5b66\u6821\u7684\u65f6\u5019\u5927\u90e8\u5206\u7684\u540c\u5b66\u90fd\u662f\u4e3a\u4e86\u5e94\u4ed8\u8003\u8bd5\u800c\u5b66\u4e60\uff0c\u8fc7\u51e0\u5929\u5168\u5fd8\u4e86\u3002\u968f\u7740\u5de5\u4f5c\u7684\u65f6\u95f4\u8d8a\u4e45\uff0c\u8d8a\u4f53\u4f1a\u5230\u8fd9\u4e9b\u57fa\u7840\u77e5\u8bc6\u7684\u91cd\u8981\u6027\u3002\u505a\u6280\u672f\u548c\u7ec3\u6b66\u529f\u4e00\u6837\uff0c\u5f53\u4f60\u5230\u4e86\u4e00\u5b9a\u7684\u9636\u6bb5\uff0c\u4e5f\u4f1a\u9047\u5230\u4e00\u4e2a\u74f6\u9888\uff0c\u7a81\u7834\u4e86\u4f60\u7684\u773c\u754c\u5c31\u4f1a\u5927\u4e0d\u540c\uff0c\u7a81\u7834\u4e0d\u4e86\uff0c\u53ea\u80fd\u56f0\u5728\u539f\u5730\u65e0\u6cd5\u6210\u957f\u3002\u6211\u81ea\u5df1\u6df1\u6709\u4f53\u4f1a\uff0c\u8fd9\u4e9b\u57fa\u7840\u77e5\u8bc6\uff0c\u5e95\u5c42\u539f\u7406\u662f\u52a9\u4f60\u6253\u7834\u74f6\u9888\u7684\u7075\u4e39\u5999\u836f\u3002\u5f53\u7406\u89e3\u4e86\u4e00\u4e9b\u5e95\u5c42\u539f\u7406\u4e4b\u540e\uff0c\u4f1a\u53d1\u73b0\u73b0\u5728\u5f88\u591a\u70ed\u95e8\u6280\u672f\uff0c\u539f\u7406\uff0c\u5e38\u89c1\u7684\u8bbe\u8ba1\u90fd\u662f\u5728\u5e95\u5c42\u57fa\u7840\u4e0a\u53d1\u5c55\u800c\u6765\u7684\u3002<\/p>\n<p>\u8fd9\u7bc7\u603b\u7ed3\u4e00\u4e0b\u5355\u673a\u7cfb\u7edf\u7684\u865a\u62df\u5185\u5b58\u539f\u7406\u3002\u5728<a href=\"http:\/\/blog.csdn.net\/iter_zc\/article\/details\/41979189\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">\u804a\u804a\u9ad8\u5e76\u53d1\uff08\u4e09\u5341\u56db\uff09Java\u5185\u5b58\u6a21\u578b\u90a3\u4e9b\u4e8b\uff08\u4e8c\uff09\u7406\u89e3CPU\u9ad8\u901f\u7f13\u5b58\u7684\u5de5\u4f5c\u539f\u7406<\/a>\u00a0\u8fd9\u7bc7\u4e2d\u8bf4\u4e86CPU\u9ad8\u901f\u7f13\u5b58\u7684\u4e00\u4e9b\u539f\u7406\uff0c\u865a\u62df\u5185\u5b58\u4e5f\u662f\u7f13\u5b58\u539f\u7406\u7684\u5e94\u7528\uff0c\u5b83\u662f\u5355\u673a\u7cfb\u7edf\u7ba1\u7406\u5185\u5b58\u7684\u624b\u6bb5\uff0c\u5f88\u591a\u8bbe\u8ba1\u975e\u5e38\u7ecf\u5178\uff0c\u5728\u5206\u5e03\u5f0f\u5b58\u50a8\u7cfb\u7edf\u4e2d\u53ef\u4ee5\u770b\u5230\u8fd9\u4e9b\u539f\u7406\u548c\u8bbe\u8ba1\u7684\u5e94\u7528\u3002<\/p>\n<p>\u865a\u62df\u5185\u5b58\u662f\u5355\u673a\u7cfb\u7edf\u6700\u91cd\u8981\u7684\u51e0\u4e2a\u5e95\u5c42\u539f\u7406\u4e4b\u4e00\uff0c\u5b83\u7531\u5e95\u5c42\u786c\u4ef6\u548c\u64cd\u4f5c\u7cfb\u7edf\u4e24\u8005\u8f6f\u786c\u4ef6\u7ed3\u5408\u6765\u5b9e\u73b0\uff0c\u662f<strong>\u786c\u4ef6\u5f02\u5e38\uff0c\u786c\u4ef6\u5730\u5740\u7ffb\u8bd1\uff0c\u4e3b\u5b58\uff0c\u78c1\u76d8\u6587\u4ef6\u548c\u5185\u6838<\/strong>\u7684\u5b8c\u7f8e\u4ea4\u4e92\u3002\u5b83\u4e3b\u8981\u63d0\u4f9b\u4e863\u4e2a\u80fd\u529b\uff1a<\/p>\n<p>1. \u7ed9\u6240\u6709\u8fdb\u7a0b\u63d0\u4f9b\u4e00\u81f4\u7684\u5730\u5740\u7a7a\u95f4\uff0c\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u8ba4\u4e3a\u81ea\u5df1\u662f\u5728\u72ec\u5360\u4f7f\u7528\u5355\u673a\u7cfb\u7edf\u7684\u5b58\u50a8\u8d44\u6e90<\/p>\n<p>2. \u4fdd\u62a4\u6bcf\u4e2a\u8fdb\u7a0b\u7684\u5730\u5740\u7a7a\u95f4\u4e0d\u88ab\u5176\u4ed6\u8fdb\u7a0b\u7834\u574f\uff0c\u9694\u79bb\u4e86\u8fdb\u7a0b\u7684\u5730\u5740\u8bbf\u95ee<\/p>\n<p>3. \u6839\u636e\u7f13\u5b58\u539f\u7406\uff0c\u4e0a\u5c42\u5b58\u50a8\u662f\u4e0b\u5c42\u5b58\u50a8\u7684\u7f13\u5b58\uff0c\u865a\u62df\u5185\u5b58\u628a\u4e3b\u5b58\u4f5c\u4e3a\u78c1\u76d8\u7684\u9ad8\u901f\u7f13\u5b58\uff0c\u5728\u4e3b\u5b58\u548c\u78c1\u76d8\u4e4b\u95f4\u6839\u636e\u9700\u8981\u6765\u56de\u4f20\u9001\u6570\u636e\uff0c\u9ad8\u6548\u5730\u4f7f\u7528\u4e86\u4e3b\u5b58<\/p>\n<p>\u5305\u62ec\u51e0\u5757\u5185\u5bb9<\/p>\n<p>1. \u865a\u62df\u5730\u5740\u548c\u7269\u7406\u5730\u5740<\/p>\n<p>2. \u9875\u8868<\/p>\n<p>3. \u5730\u5740\u7ffb\u8bd1<\/p>\n<p>4. \u865a\u62df\u5185\u5b58\u76f8\u5173\u7684\u6570\u636e\u7ed3\u6784<\/p>\n<p>5. \u5185\u5b58\u6620\u5c04<\/p>\n<p><strong>\u865a\u62df\u5730\u5740\u548c\u7269\u7406\u5730\u5740<\/strong><\/p>\n<p>\u5bf9\u4e8e\u6bcf\u4e2a\u8fdb\u7a0b\u6765\u8bf4\uff0c\u5b83\u4f7f\u7528\u5230\u7684\u90fd\u662f\u865a\u62df\u5730\u5740\uff0c\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u770b\u5230\u4e00\u6837\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4,\u5bf9\u4e8e32\u4f4d\u8ba1\u7b97\u673a\u7cfb\u7edf\u6765\u8bf4\uff0c\u5b83\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4\u662f 0 &#8211; 2^32\uff0c\u4e5f\u5c31\u662f0 &#8211; 4G\u3002\u5bf9\u4e8e64\u4f4d\u7684\u8ba1\u7b97\u673a\u7cfb\u7edf\u6765\u8bf4\uff0c\u7406\u8bba\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4\u662f 0 &#8211; 2^64\uff0c\u8fdc\u9ad8\u4e8e\u76ee\u524d\u5e38\u89c1\u7684\u7269\u7406\u5185\u5b58\u7a7a\u95f4\u3002\u865a\u62df\u5730\u5740\u7a7a\u95f4\u4e0d\u9700\u8981\u548c\u7269\u7406\u5730\u5740\u7a7a\u95f4\u4e00\u6837\u5927\u5c0f\u3002<\/p>\n<p>Linux\u5185\u6838\u628a\u865a\u62df\u5730\u5740\u7a7a\u95f4\u5206\u4e3a\u4e24\u90e8\u5206: \u7528\u6237\u8fdb\u7a0b\u7a7a\u95f4\u548c\u5185\u6838\u8fdb\u7a0b\u7a7a\u95f4\uff0c\u4e24\u8005\u7684\u6bd4\u4f8b\u4e00\u822c\u662f3\uff1a1\uff0c\u6bd4\u59824G\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4\uff0c3G\u7528\u6237\u7528\u6237\u8fdb\u7a0b\uff0c1G\u7528\u4e8e\u5185\u6838\u8fdb\u7a0b\u3002<\/p>\n<p>\u4e0b\u56fe\u662f\u4e00\u4e2a\u5178\u578b\u7684Linux\u8fdb\u7a0b\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4\u5206\u5e03<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdn.net\/20150112163706063?watermark\/2\/text\/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvSVRlcl9aQw==\/font\/5a6L5L2T\/fontsize\/400\/fill\/I0JBQkFCMA==\/dissolve\/70\/gravity\/Center\" alt=\"\" \/>\u5728\u8bf4CPU\u9ad8\u901f\u7f13\u5b58\u7684\u65f6\u5019\u8bf4\u8fc7CPU\u53ea\u76f4\u63a5\u548c\u5bc4\u5b58\u5668\u548c\u9ad8\u901f\u7f13\u5b58\u6253\u4ea4\u9053\uff0cCPU\u5728\u6267\u884c\u8fdb\u7a0b\u7684\u6307\u4ee4\u65f6\u8981\u53d6\u4e00\u4e2a\u5b9e\u9645\u7684\u7269\u7406\u5730\u5740\u7684\u503c\u7684\u65f6\u5019\u4e3b\u8981\u6709\u51e0\u6b65\uff1a<\/p>\n<p>1. \u628a\u8fdb\u7a0b\u6307\u4ee4\u4f7f\u7528\u7684\u865a\u62df\u5730\u5740\u901a\u8fc7MMU\u8f6c\u6362\u6210\u7269\u7406\u5730\u5740<\/p>\n<p>2. \u628a\u7269\u7406\u5730\u5740\u6620\u5c04\u5230\u9ad8\u901f\u7f13\u5b58\u7684\u7f13\u5b58\u884c<\/p>\n<p>3. \u5982\u679c\u9ad8\u901f\u7f13\u5b58\u547d\u4e2d\u5c31\u8fd4\u56de<\/p>\n<p>4. \u5982\u679c\u4e0d\u547d\u4e2d\uff0c\u5c31\u4ea7\u751f\u4e00\u4e2a\u7f13\u5b58\u7f3a\u5931\u4e2d\u65ad\uff0c\u4ece\u4e3b\u5b58\u76f8\u5e94\u7684\u7269\u7406\u5730\u5740\u53d6\u503c\uff0c\u5e76\u52a0\u8f7d\u5230\u9ad8\u901f\u7f13\u5b58\u4e2d\u3002CPU\u4ece\u4e2d\u65ad\u4e2d\u6062\u590d\uff0c\u7ee7\u7eed\u6267\u884c\u4e2d\u65ad\u524d\u7684\u6307\u4ee4<\/p>\n<p>\u6240\u4ee5\u9ad8\u901f\u7f13\u5b58\u662f\u548c\u7269\u7406\u5730\u5740\u76f8\u6620\u5c04\u7684\uff0c\u8fdb\u7a0b\u6307\u4ee4\u4e2d\u4f7f\u7528\u5230\u7684\u662f\u865a\u62df\u5730\u5740\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdn.net\/20150112163744283?watermark\/2\/text\/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvSVRlcl9aQw==\/font\/5a6L5L2T\/fontsize\/400\/fill\/I0JBQkFCMA==\/dissolve\/70\/gravity\/Center\" alt=\"\" \/><strong>\u64cd\u4f5c\u7cfb\u7edf\u5185\u5b58\u7ba1\u7406<\/strong><\/p>\n<p><strong>\u5728\u7f13\u5b58\u539f\u7406\u4e2d\uff0c\u6570\u636e\u90fd\u662f\u6309\u5757\u6765\u8fdb\u884c\u903b\u8f91\u5212\u5206\u7684\uff0c\u4e00\u6b21\u6362\u5165\/\u6362\u51fa\u7684\u6570\u636e\u90fd\u662f\u4ee5\u5757\u4e3a\u6700\u5c0f\u5355\u4f4d\uff0c\u8fd9\u6837\u63d0\u9ad8\u4e86\u6570\u636e\u5904\u7406\u7684\u6027\u80fd\u3002\u540c\u6837\u7684\u539f\u7406\u5e94\u7528\u5230\u5177\u4f53\u7684\u5185\u5b58\u7ba1\u7406\u65f6\uff0c\u4f7f\u7528\u4e86\u9875(page)\u6765\u8868\u793a\u5757\uff0c\u865a\u62df\u5730\u5740\u7a7a\u95f4\u5212\u5206\u4e3a\u591a\u4e2a\u56fa\u5b9a\u5927\u5c0f\u7684\u865a\u62df\u9875(Virtual Page, VP)\uff0c\u7269\u7406\u5730\u5740\u7a7a\u95f4\u5212\u5206\u4e3a\u591a\u4e2a\u56fa\u5b9a\u5927\u5c0f\u7684\u7269\u7406\u9875(Physical Page, PP), \u901a\u5e38\u865a\u62df\u9875\u5927\u5c0f\u7b49\u4e8e\u7269\u7406\u9875\u5927\u5c0f\uff0c\u8fd9\u6837\u7b80\u5316\u4e86\u865a\u62df\u9875\u548c\u7269\u7406\u9875\u7684\u6620\u5c04\u3002\u865a\u62df\u9875\u7684\u5927\u5c0f\u901a\u5e38\u57284KB &#8211; 2MB\u4e4b\u95f4\u3002\u5728JVM\u8c03\u4f18\u7684\u65f6\u5019\u6709\u65f6\u5019\u4f1a\u4f7f\u75282MB\u7684\u5927\u5185\u5b58\u9875\u6765\u63d0\u9ad8GC\u7684\u6027\u80fd\u3002<\/strong><\/p>\n<p>\u8981\u660e\u767d\u4e00\u4e2a\u91cd\u8981\u7684\u6982\u5ff5\uff1a<\/p>\n<p><strong>1. \u5bf9\u4e8eCPU\u6765\u8bf4\uff0c\u5b83\u7684\u76ee\u6807\u5b58\u50a8\u5668\u662f\u7269\u7406\u5185\u5b58\uff0c\u4f7f\u7528\u9ad8\u901f\u7f13\u5b58\u505a\u7269\u7406\u5185\u5b58\u7684\u7f13\u5b58<\/strong><\/p>\n<p><strong>2. \u540c\u6837\uff0c\u5bf9\u4e8e\u865a\u62df\u5185\u5b58\u6765\u8bf4\uff0c\u5b83\u7684\u76ee\u6807\u5b58\u50a8\u5668\u662f\u78c1\u76d8\u7a7a\u95f4\uff0c\u4f7f\u7528\u7269\u7406\u5185\u5b58\u505a\u78c1\u76d8\u7684\u7f13\u5b58<\/strong><\/p>\n<p><strong>\u6240\u4ee5\uff0c\u4ece\u7f13\u5b58\u539f\u7406\u7684\u89d2\u5ea6\u6765\u7406\u89e3\uff0c\u5728\u4efb\u4f55\u65f6\u523b\uff0c\u865a\u62df\u9875\u7684\u96c6\u5408\u90fd\u5206\u4e3a3\u4e2a\u4e0d\u76f8\u4ea4\u7684\u5b50\u96c6\uff1a<\/strong><\/p>\n<p><strong>1. \u672a\u5206\u914d\u7684\u9875\uff0c\u5373\u6ca1\u6709\u4efb\u4f55\u6570\u636e\u548c\u8fd9\u4e9b\u865a\u62df\u9875\u5173\u8054\uff0c\u4e0d\u5360\u7528\u4efb\u4f55\u78c1\u76d8\u7a7a\u95f4<\/strong><\/p>\n<p><strong>2. \u7f13\u5b58\u7684\u9875\uff0c\u5373\u5df2\u7ecf\u5206\u914d\u4e86\u7684\u865a\u62df\u9875\uff0c\u5e76\u4e14\u5df2\u7ecf\u7f13\u5b58\u5728\u5177\u4f53\u7684\u7269\u7406\u9875\u4e2d<\/strong><\/p>\n<p><strong>3. \u672a\u7f13\u5b58\u7684\u9875\uff0c\u5373\u5df2\u7ecf\u4e3a\u78c1\u76d8\u6587\u4ef6\u5206\u914d\u4e86\u865a\u62df\u9875\uff0c\u4f46\u662f\u8fd8\u6ca1\u6709\u7f13\u5b58\u5230\u5177\u4f53\u7684\u7269\u7406\u9875\u4e2d<\/strong><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdn.net\/20150112163748968?watermark\/2\/text\/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvSVRlcl9aQw==\/font\/5a6L5L2T\/fontsize\/400\/fill\/I0JBQkFCMA==\/dissolve\/70\/gravity\/Center\" alt=\"\" \/>\u865a\u62df\u5185\u5b58\u7cfb\u7edf\u548c\u9ad8\u901f\u7f13\u5b58\u7cfb\u7edf\u4e00\u6837\uff0c\u9700\u8981\u5224\u65ad\u4e00\u4e2a\u865a\u62df\u9875\u9762\u662f\u5426\u7f13\u5b58\u5728DRAM(\u4e3b\u5b58)\u4e2d\uff0c\u5982\u679c\u547d\u4e2d\uff0c\u5c31\u76f4\u63a5\u627e\u5230\u5bf9\u5e94\u7684\u7269\u7406\u9875\u3002\u5982\u679c\u4e0d\u547d\u4e2d\uff0c\u64cd\u4f5c\u7cfb\u7edf\u9700\u8981\u77e5\u9053\u8fd9\u4e2a\u865a\u62df\u9875\u5bf9\u5e94\u78c1\u76d8\u7684\u54ea\u4e2a\u4f4d\u7f6e\uff0c\u7136\u540e\u6839\u636e\u76f8\u5e94\u7684\u66ff\u6362\u7b56\u7565\u4eceDRAM\u4e2d\u9009\u62e9\u4e00\u4e2a\u727a\u7272\u7684\u7269\u7406\u9875\uff0c\u628a\u865a\u62df\u9875\u4ece\u78c1\u76d8\u4e2d\u52a0\u8f7d\u5230DRAM\u7269\u7406\u4e3b\u5b58\u4e2d<\/p>\n<p>\u865a\u62df\u5185\u5b58\u7684\u8fd9\u79cd\u7f13\u5b58\u7ba1\u7406\u673a\u5236\u662f\u901a\u8fc7\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\uff0cMMU(\u5185\u5b58\u7ba1\u7406\u5355\u5143)\u4e2d\u7684\u5730\u5740\u7ffb\u8bd1\u786c\u4ef6\u548c\u6bcf\u4e2a\u8fdb\u7a0b\u5b58\u653e\u5728\u4e3b\u5b58\u4e2d\u7684\u9875\u8868(page table)\u6570\u636e\u7ed3\u6784\u6765\u5b9e\u73b0\u7684\u3002<\/p>\n<p><strong>\u9875\u8868<\/strong><\/p>\n<p>\u9875\u8868(page table)\u662f\u5b58\u653e\u5728\u4e3b\u5b58\u4e2d\u7684\uff0c\u6bcf\u4e2a\u8fdb\u7a0b\u7ef4\u62a4\u4e00\u4e2a\u5355\u72ec\u7684\u9875\u8868\u3002<strong>\u5b83\u662f\u4e00\u79cd\u7ba1\u7406\u865a\u62df\u5185\u5b58\u9875\u548c\u7269\u7406\u5185\u5b58\u9875\u6620\u5c04\u548c\u7f13\u5b58\u72b6\u6001\u7684\u6570\u636e\u7ed3\u6784\u3002<\/strong>\u5b83\u903b\u8f91\u4e0a\u662f\u7531\u9875\u8868\u6761\u76ee(Page Table Entry\uff0c PTE)\u4e3a\u57fa\u672c\u5143\u7d20\u6784\u6210\u7684\u6570\u7ec4\u3002<\/p>\n<p><strong>1. \u6570\u7ec4\u7684\u7d22\u5f15\u53f7\u5bf9\u5e94\u7740\u865a\u62df\u9875\u53f7<\/strong><\/p>\n<p><strong>2. \u6570\u7ec4\u7684\u503c\u5bf9\u5e94\u7740\u7269\u7406\u9875\u53f7<\/strong><\/p>\n<p><strong>3. \u6570\u7ec4\u7684\u503c\u53ef\u4ee5\u7559\u51fa\u51e0\u4f4d\u6765\u8868\u793a\u6709\u6548\u4f4d\uff0c\u6743\u9650\u63a7\u5236\u4f4d<\/strong>\u3002\u6709\u6548\u4f4d\u4e3a1\u7684\u65f6\u5019\u8868\u793a\u865a\u62df\u9875\u5df2\u7ecf\u7f13\u5b58\u3002\u6709\u6548\u4f4d\u4e3a0\uff0c\u6570\u7ec4\u503c\u4e3anull\u65f6\uff0c\u8868\u793a\u672a\u5206\u914d\u3002\u6709\u6548\u4f4d\u4e3a0\uff0c\u6570\u7ec4\u503c\u4e0d\u4e3anull\uff0c\u8868\u793a\u5df2\u7ecf\u5206\u914d\u4e86\u865a\u62df\u9875\uff0c\u4f46\u662f\u8fd8\u672a\u7f13\u5b58\u5230\u5177\u4f53\u7684\u7269\u7406\u9875\u4e2d\u3002<strong>\u6743\u9650\u63a7\u5236\u4f4d\u6709\u53ef\u8bfb\uff0c\u53ef\u5199\uff0c\u662f\u5426\u9700\u8981root\u6743\u9650<\/strong><img decoding=\"async\" src=\"https:\/\/img-blog.csdn.net\/20150112163901987?watermark\/2\/text\/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvSVRlcl9aQw==\/font\/5a6L5L2T\/fontsize\/400\/fill\/I0JBQkFCMA==\/dissolve\/70\/gravity\/Center\" alt=\"\" \/><\/p>\n<p><strong><a href=\"http:\/\/blog.csdn.net\/iter_zc\/article\/details\/41979189\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">\u804a\u804a\u9ad8\u5e76\u53d1\uff08\u4e09\u5341\u56db\uff09Java\u5185\u5b58\u6a21\u578b\u90a3\u4e9b\u4e8b\uff08\u4e8c\uff09\u7406\u89e3CPU\u9ad8\u901f\u7f13\u5b58\u7684\u5de5\u4f5c\u539f\u7406<\/a>\u00a0\u8fd9\u7bc7\u4e2d\u89e3\u91ca\u4e86\u7f13\u5b58\u76f8\u8054\u5ea6\u7684\u6982\u5ff5\uff0cDRAM\u7f13\u5b58\u662f\u5168\u76f8\u8054\u7684\uff0c\u5373\u53ea\u6709\u4e00\u7ec4\uff0c\u4efb\u610f\u7684\u7f13\u5b58\u884c\u53ef\u4ee5\u7f13\u5b58\u4efb\u610f\u7684\u5185\u5bb9\uff0c\u6709\u4e00\u4e2a\u6bd4\u8f83\u5224\u65ad\u7684\u8fc7\u7a0b\uff0c\u5373\u4efb\u610f\u7684\u865a\u62df\u9875\u53ef\u4ee5\u5bf9\u5e94\u4efb\u610f\u7684\u7269\u7406\u9875\u3002<\/strong><\/p>\n<p>DARM\u7f13\u5b58\u7684\u547d\u4e2d\u79f0\u4e3a\u9875\u547d\u4e2d\uff0c\u4e0d\u547d\u4e2d\u79f0\u4e3a\u7f3a\u9875\u3002\u4e3e\u4e2a\u4f8b\u5b50\u6765\u8bf4\uff0c<\/p>\n<p>1. CPU\u8981\u8bbf\u95ee\u7684\u4e00\u4e2a\u865a\u62df\u5730\u5740\u5728\u865a\u62df\u98753\u4e0a\uff08VP3\uff09\uff0c\u901a\u8fc7\u5730\u5740\u7ffb\u8bd1\u786c\u4ef6\u4ece\u9875\u8868\u76843\u53f7\u9875\u8868\u6761\u76ee\u4e2d\u53d6\u51fa\u5185\u5bb9\uff0c\u53d1\u73b0\u6709\u6548\u4f4d0\uff0c\u5373\u6ca1\u6709\u7f13\u5b58\uff0c\u5c31\u4ea7\u751f\u4e00\u4e2a\u7f3a\u9875\u5f02\u5e38<\/p>\n<p>2. \u7f3a\u9875\u5f02\u5e38\u8c03\u7528\u5185\u6838\u7684\u7f3a\u9875\u5f02\u5e38\u5904\u7406\u7a0b\u5e8f\uff0c\u5b83\u4f1a\u6839\u636e\u66ff\u6362\u7b97\u6cd5\u9009\u62e9\u4e00\u4e2aDRAM\u4e2d\u7684\u727a\u7272\u9875\uff0c\u6bd4\u5982PP3\u3002PP3\u4e2d\u5df2\u7ecf\u7f13\u5b58\u4e86VP4\u5bf9\u5e94\u7684\u78c1\u76d8\u6587\u4ef6\u7684\u5185\u5bb9\uff0c\u5982\u679cVP4\u7684\u5185\u5bb9\u6709\u6539\u52a8\uff0c\u5c31\u5237\u65b0\u5230\u78c1\u76d8\u4e2d\u53bb\u3002\u7136\u540e\u628aVP3\u5bf9\u5e94\u7684\u78c1\u76d8\u6587\u4ef6\u5185\u5bb9\u52a0\u8f7d\u5230PP3\u4e2d\u3002\u7136\u540e\u66f4\u65b0\u9875\u8868\u6761\u76ee\uff0c\u628aPTE3\u6307\u5411PP3,\u5e76\u4fee\u6539PTE4\uff0c\u4e0d\u518d\u6307\u5411PP3.<\/p>\n<p>3. \u7f3a\u9875\u5f02\u5e38\u5904\u7406\u7a0b\u5e8f\u8fd4\u56de\u540e\u91cd\u65b0\u542f\u52a8\u7f3a\u9875\u5f02\u5e38\u524d\u7684\u6307\u4ee4\uff0c\u8fd9\u65f6\u5019\u865a\u62df\u5730\u5740\u5bf9\u5e94\u7684\u5185\u5bb9\u5df2\u7ecf\u7f13\u5b58\u5728\u4e3b\u5b58\u4e2d\u4e86\uff0c\u9875\u547d\u4e2d\u4e5f\u53ef\u4ee5\u8ba9\u5730\u5740\u7ffb\u8bd1\u786c\u4ef6\u6b63\u5e38\u5904\u7406\u4e86<\/p>\n<p>\u78c1\u76d8\u548c\u4e3b\u5b58\u4e4b\u95f4\u4f20\u9001\u9875\u7684\u6d3b\u52a8\u53eb\u505a\u4ea4\u6362(swapping)\u6216\u8005\u9875\u9762\u8c03\u5ea6\uff08\u9875\u9762\u8c03\u5165\uff0c\u9875\u9762\u8c03\u51fa\uff09\u3002\u73b0\u4ee3\u64cd\u4f5c\u7cfb\u7edf\u90fd\u91c7\u7528\u6309\u9700\u8c03\u5ea6\u7684\u7b56\u7565\uff0c\u5373\u4e0d\u547d\u4e2d\u53d1\u751f\u65f6\u624d\u8c03\u5165\u9875\u9762\u3002\u64cd\u4f5c\u7cfb\u7edf\u90fd\u4f1a\u5728\u4e3b\u5b58\u4e2d\u5206\u914d\u4e00\u5757\u4ea4\u6362\u533a(swap)\u6765\u4f5c\u7f13\u51b2\u533a\uff0c\u52a0\u901f\u9875\u9762\u8c03\u5ea6\u3002<\/p>\n<p>\u7531\u4e8e\u9875\u7684\u4ea4\u6362\u4f1a\u5f15\u8d77\u78c1\u76d8\u6d41\u91cf\uff0c\u6240\u4ee5\u5177\u6709\u597d\u7684\u5c40\u90e8\u6027\u7684\u7a0b\u5e8f\u53ef\u4ee5\u5927\u5927\u51cf\u5c11\u78c1\u76d8\u6d41\u91cf\uff0c\u63d0\u9ad8\u6027\u80fd\u3002\u800c\u5982\u679c\u5c40\u90e8\u6027\u4e0d\u597d\u4ea7\u751f\u5927\u91cf\u7f3a\u9875\uff0c\u4ece\u800c\u5bfc\u81f4\u4e0d\u65ad\u5730\u5728\u78c1\u76d8\u548c\u4e3b\u5b58\u4ea4\u6362\u9875\uff0c\u8fd9\u79cd\u73b0\u8c61\u53eb<strong>\u7f13\u5b58\u98a0\u7c38<\/strong>\u3002\u53ef\u4ee5\u7528Unix\u7684\u51fd\u6570getrusage\u6765\u7edf\u8ba1\u7f3a\u9875\u7684\u6b21\u6570<\/p>\n<p>\u73b0\u4ee3\u64cd\u4f5c\u7cfb\u7edf\u90fd\u91c7\u7528\u591a\u7ea7\u9875\u8868\u7684\u65b9\u5f0f\u6765\u538b\u7f29\u9875\u8868\u7684\u5927\u5c0f\u3002\u4e3e\u4e2a\u4f8b\u5b50\uff0c<\/p>\n<p>1. \u5bf9\u4e8e32\u4f4d\u7684\u673a\u5668\u6765\u8bf4\uff0c\u652f\u63014G\u7684\u865a\u62df\u5185\u5b58\u5927\u5c0f\uff0c\u5982\u679c\u6bcf\u4e2a\u9875\u662f4KB\u5927\u5c0f\uff0c\u90a3\u4e48\u91c7\u7528\u4e00\u7ea7\u9875\u8868\u7684\u8bdd\uff0c\u9700\u898110^6\u4e2a\u9875\u8868\u6761\u76eePTE\u300232\u4f4d\u673a\u5668\u7684\u9875\u8868\u6761\u76ee\u662f4\u4e2a\u5b57\u8282\uff0c\u90a3\u4e48\u9875\u8868\u9700\u89814MB\u5927\u5c0f\u7684\u7a7a\u95f4\u3002<\/p>\n<p>2. \u5047\u8bbe\u4f7f\u75284MB\u5927\u5c0f\u7684\u9875\uff0c\u90a3\u4e48\u53ea\u9700\u898110^3\u4e2a\u9875\u8868\u9879\u3002\u5047\u8bbe\u6bcf\u4e2a4MB\u5927\u5c0f\u7684\u9875\u53c8\u5206\u4e3a4KB\u5927\u5c0f\u7684\u5b50\u9875\uff0c\u90a3\u4e48\u6bcf\u4e2a4MB\u5927\u5c0f\u7684\u9875\u9700\u898110^3\u4e2a\u7684\u9875\u8868\u9879\u6765\u6307\u5411\u5b50\u9875\u3002\u4e5f\u5c31\u662f\u8bf4\u53ef\u4ee5\u5206\u4e3a\u4e24\u7ea7\u9875\u8868\uff0c\u7b2c\u4e00\u7ea7\u9875\u8868\u9879\u53ea\u9700\u89814KB\u5927\u5c0f\u7684\u9875\u8868\u9879\uff0c\u6bcf\u4e2a\u4e00\u7ea7\u9875\u8868\u9879\u53c8\u6307\u5411\u4e00\u4e2a4KB\u5927\u5c0f\u7684\u4e8c\u7ea7\u9875\u8868\uff0c\u4e8c\u7ea7\u9875\u8868\u9879\u5219\u6307\u5411\u5b9e\u9645\u7684\u7269\u7406\u9875\u3002<\/p>\n<p>\u9875\u8868\u9879\u52a0\u8f7d\u662f\u6309\u9700\u52a0\u8f7d\u7684\uff0c\u6ca1\u6709\u5206\u914d\u7684\u865a\u62df\u9875\u4e0d\u9700\u8981\u5efa\u7acb\u9875\u8868\u9879\uff0c \u6240\u4ee5\u53ef\u4ee5\u4e00\u5f00\u59cb\u53ea\u5efa\u7acb\u4e00\u7ea7\u9875\u8868\u9879\uff0c\u800c\u4e8c\u7ea7\u9875\u8868\u9879\u6309\u9700\u521b\u5efa\uff0c\u8fd9\u6837\u5927\u5927\u538b\u7f29\u4e86\u9875\u8868\u7684\u7a7a\u95f4\u3002<\/p>\n<p>\u4f7f\u7528k\u7ea7\u9875\u8868\u9879\u7684\u5730\u5740\u7ffb\u8bd1\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdn.net\/20150112163933640?watermark\/2\/text\/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvSVRlcl9aQw==\/font\/5a6L5L2T\/fontsize\/400\/fill\/I0JBQkFCMA==\/dissolve\/70\/gravity\/Center\" alt=\"\" \/>Core i7\u91c7\u75284\u7ea7\u9875\u8868\u7684\u7ed3\u6784<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdn.net\/20150112164040142?watermark\/2\/text\/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvSVRlcl9aQw==\/font\/5a6L5L2T\/fontsize\/400\/fill\/I0JBQkFCMA==\/dissolve\/70\/gravity\/Center\" alt=\"\" \/><\/p>\n<p><strong>\u5730\u5740\u7ffb\u8bd1<\/strong><\/p>\n<p>\u5730\u5740\u7ffb\u8bd1\u5c31\u662f\u628aN\u4e2a\u5143\u7d20\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4(VAS)\u6620\u5c04\u5230M\u4e2a\u5143\u7d20\u7684\u7269\u7406\u5730\u5740\u7a7a\u95f4(PAS)\u7684\u8fc7\u7a0b\u3002\u4e0b\u8868\u662f\u5730\u5740\u7ffb\u8bd1\u65f6\u7528\u5230\u7684\u7b26\u53f7<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdn.net\/20150112164041078?watermark\/2\/text\/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvSVRlcl9aQw==\/font\/5a6L5L2T\/fontsize\/400\/fill\/I0JBQkFCMA==\/dissolve\/70\/gravity\/Center\" alt=\"\" \/>\u4e0b\u9762\u770b\u4e00\u4e0bCPU\u5982\u4f55\u628a\u4e00\u4e2a\u865a\u62df\u5730\u5740\u7ffb\u8bd1\u5230\u5bf9\u5e94\u7684\u7269\u7406\u5730\u5740\u3002<\/p>\n<p>1. CPU\u6709\u4e00\u4e2a\u4e13\u95e8\u7684\u9875\u8868\u57fa\u5730\u5740\u5bc4\u5b58\u5668(page table base register, PTBR)\u6307\u5411\u5f53\u524d\u9875\u8868\u7684\u57fa\u5730\u5740\uff0c\u4ece\u800c\u53ef\u4ee5\u5feb\u901f\u5b9a\u4f4d\u5230\u8be5\u8fdb\u7a0b\u7684\u9875\u8868<\/p>\n<p>2. n\u4f4d\u7684\u865a\u62df\u5730\u5740\u5212\u5206\u4e3ap\u4f4d\u7684\u865a\u62df\u5730\u5740\u504f\u79fb\u91cfVPO\u548c(n &#8211; p)\u4f4d\u7684\u865a\u62df\u9875\u53f7VPN<\/p>\n<p>3. \u7269\u7406\u5730\u5740\u540c\u6837\u5212\u5206\u4e3ap\u4f4d\u7684\u7269\u7406\u5730\u5740\u504f\u79fb\u91cfPPO\u548c(m &#8211; p)\u4f4d\u7684\u7269\u7406\u9875\u53f7PPN<\/p>\n<p>4. \u7531\u4e8e\u865a\u62df\u9875\u5927\u5c0f\u548c\u7269\u7406\u9875\u5927\u5c0f\u76f8\u540c\uff0c\u6240\u4ee5VPO = PPO<img decoding=\"async\" src=\"https:\/\/img-blog.csdn.net\/20150112164154305?watermark\/2\/text\/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvSVRlcl9aQw==\/font\/5a6L5L2T\/fontsize\/400\/fill\/I0JBQkFCMA==\/dissolve\/70\/gravity\/Center\" alt=\"\" \/><\/p>\n<p>\u9875\u9762\u7684\u547d\u4e2d\u5b8c\u5168\u7531\u786c\u4ef6\u5b8c\u6210\uff0c\u7f3a\u9875\u5219\u7531\u786c\u4ef6\u548c\u5185\u6838\u5171\u540c\u5b8c\u6210\uff0c\u5df2\u7ecf\u5728\u4e0a\u9762\u4e3e\u4f8b\u8bf4\u660e\u4e86\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdn.net\/20150112164224444?watermark\/2\/text\/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvSVRlcl9aQw==\/font\/5a6L5L2T\/fontsize\/400\/fill\/I0JBQkFCMA==\/dissolve\/70\/gravity\/Center\" alt=\"\" \/><\/p>\n<p>\u4e3a\u4e86\u63d0\u9ad8\u5730\u5740\u7ffb\u8bd1\u7684\u6548\u7387\uff0c\u5730\u5740\u7ffb\u8bd1\u786c\u4ef6\u8fd8\u5f15\u5165\u4e86\u4e00\u4e2a\u786c\u4ef6\u8bbe\u5907\u6765\u7f13\u5b58\u9875\u8868\u6761\u76eePTE\uff0c\u53eb\u505a\u7ffb\u8bd1\u540e\u5907\u7f13\u51b2\u533aTLB\uff08translation lookaside buffer\uff09\u3002\u5b83\u662f\u4e00\u4e2a\u5c0f\u7684\uff0c\u865a\u62df\u5bfb\u5740\u7684\u7f13\u5b58\uff0c\u6bcf\u4e00\u884c\u90fd\u4fdd\u5b58\u4e00\u4e2a\u7531\u5355\u4e2aPTE\u7ec4\u6210\u7684\u5757\u3002TLB\u4e5f\u9075\u5faa\u7f13\u5b58\u7684\u8bbe\u8ba1\u539f\u7406\uff0c\u5206\u4e3a\u7ec4\uff0c\u884c\uff0c\u5757\u7684\u7ed3\u6784\u3002\u4e00\u4e2a\u865a\u62df\u5730\u5740\u6620\u5c04\u5230TLB\u7684\u7f13\u5b58\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdn.net\/20150112164302445?watermark\/2\/text\/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvSVRlcl9aQw==\/font\/5a6L5L2T\/fontsize\/400\/fill\/I0JBQkFCMA==\/dissolve\/70\/gravity\/Center\" alt=\"\" \/><\/p>\n<p>\u800cTLB\u7684\u547d\u4e2d\u548c\u4e0d\u547d\u4e2d\u7684\u6d41\u7a0b\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdn.net\/20150112164259968?watermark\/2\/text\/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvSVRlcl9aQw==\/font\/5a6L5L2T\/fontsize\/400\/fill\/I0JBQkFCMA==\/dissolve\/70\/gravity\/Center\" alt=\"\" \/><\/p>\n<p>Core i7\u5904\u7406\u5668\u7684\u5730\u5740\u7ffb\u8bd1\u786c\u4ef6\u7ed3\u6784\u5982\u4e0b<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdn.net\/20150112164400072?watermark\/2\/text\/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvSVRlcl9aQw==\/font\/5a6L5L2T\/fontsize\/400\/fill\/I0JBQkFCMA==\/dissolve\/70\/gravity\/Center\" alt=\"\" \/><\/p>\n<p>\u603b\u7ed3\u4e00\u4e0b\u5730\u5740\u7ffb\u8bd1\u7684\u8fc7\u7a0b\uff1a<\/p>\n<p>1. CPU\u62ff\u5230\u4e00\u4e2a\u865a\u62df\u5730\u5740\uff0c\u5206\u4e3a\u4e24\u6b65\uff0c\u5148\u901a\u8fc7\u9875\u8868\u673a\u5236\u786e\u5b9a\u8be5\u5730\u5740\u6240\u5728\u865a\u62df\u9875\u7684\u5185\u5bb9\u662f\u5426\u4ece\u78c1\u76d8\u52a0\u8f7d\u5230\u7269\u7406\u5185\u5b58\u9875\u4e2d\uff0c\u7136\u540e\u901a\u8fc7\u9ad8\u901f\u7f13\u5b58\u673a\u5236\u4ece\u8be5\u7269\u7406\u5730\u5740\u4e2d\u53d6\u5230\u6570\u636e<\/p>\n<p>2. \u5730\u5740\u7ffb\u8bd1\u786c\u4ef6\u8981\u628a\u8fd9\u4e2a\u865a\u62df\u5730\u5740\u7ffb\u8bd1\u6210\u4e00\u4e2a\u7269\u7406\u5730\u5740\uff0c\u4ece\u800c\u53ef\u4ee5\u518d\u6839\u636e\u9ad8\u901f\u7f13\u5b58\u7684\u6620\u5c04\u5173\u7cfb\uff0c\u628a\u8fd9\u4e2a\u7269\u7406\u5730\u5740\u5bf9\u5e94\u7684\u503c\u627e\u5230<\/p>\n<p>3. \u5730\u5740\u7ffb\u8bd1\u786c\u4ef6\u5229\u7528\u9875\u8868\u6570\u636e\u7ed3\u6784\uff0cTLB\u786c\u4ef6\u7f13\u5b58\u7b49\u6280\u672f\uff0c\u76ee\u7684\u53ea\u662f\u628a\u4e00\u4e2a\u865a\u62df\u5730\u5740\u6620\u5c04\u5230\u4e00\u4e2a\u7269\u7406\u5730\u5740\u3002\u8981\u8bb0\u4f4fDRAM\u7f13\u5b58\u662f\u5168\u76f8\u8054\u7684\uff0c\u6240\u4ee5\u4e00\u4e2a\u865a\u62df\u5730\u5740\u548c\u4e00\u4e2a\u7269\u7406\u5730\u5740\u662f\u52a8\u6001\u5173\u8054\u7684\uff0c\u4e0d\u80fd\u76f4\u63a5\u6839\u636e\u865a\u62df\u5730\u5740\u63a8\u5bfc\u51fa\u7269\u7406\u5730\u5740\uff0c\u5fc5\u987b\u6839\u636eDRAM\u4ece\u78c1\u76d8\u628a\u6570\u636e\u7f13\u5b58\u5230DRAM\u65f6\u5b58\u5230\u9875\u8868\u65f6\u5b58\u7684\u5b9e\u9645\u7269\u7406\u9875\u624d\u80fd\u5f97\u5230\u5b9e\u9645\u7684\u7269\u7406\u5730\u5740\uff0c\u7528\u7269\u7406\u9875PPN + VPO\u5c31\u80fd\u7b97\u51fa\u5b9e\u9645\u7684\u7269\u7406\u5730\u5740 (VPO = PPO\uff0c\u6240\u4ee5\u76f4\u63a5\u7528VPO\u5373\u53ef)\u3002 PPN\u7684\u503c\u662f\u5b58\u5728\u9875\u8868\u6761\u76eePTE\u4e2d\u7684\u3002\u5730\u5740\u7ffb\u8bd1\u505a\u4e86\u4e00\u5806\u5de5\u4f5c\uff0c\u5c31\u662f\u4e3a\u4e86\u627e\u5230\u7269\u7406\u9875PPN\uff0c\u7136\u540e\u6839\u636eVPO\u9875\u9762\u504f\u79fb\u91cf\uff0c\u5c31\u80fd\u5b9a\u4f4d\u5230\u5b9e\u9645\u7684\u7269\u7406\u5730\u5740\u3002<\/p>\n<p>4. \u5f97\u5230\u5b9e\u9645\u7269\u7406\u5730\u5740\u540e\uff0c\u6839\u636e\u9ad8\u901f\u7f13\u5b58\u7684\u539f\u7406\uff0c\u628a\u4e00\u4e2a\u7269\u7406\u5730\u5740\u6620\u5c04\u5230\u9ad8\u901f\u7f13\u5b58\u5177\u4f53\u7684\u7ec4\uff0c\u884c\uff0c\u5757\u4e2d\uff0c\u627e\u5230\u5b9e\u9645\u5b58\u50a8\u7684\u6570\u636e\u3002<\/p>\n<p><strong>Linux\u865a\u62df\u5185\u5b58\u673a\u5236<\/strong><\/p>\n<p>Linux\u628a\u865a\u62df\u5185\u5b58\u5212\u5206\u6210\u533a\u57dfarea\u7684\u96c6\u5408\uff0c\u6bcf\u4e2a\u5b58\u5728\u7684\u865a\u62df\u9875\u9762\u90fd\u5c5e\u4e8e\u4e00\u4e2aarea\u3002\u4e00\u4e2aarea\u5305\u542b\u4e86\u8fde\u7eed\u7684\u591a\u4e2a\u9875\u3002Linux\u901a\u8fc7area\u76f8\u5173\u7684\u6570\u636e\u7ed3\u6784\u6765\u7075\u6d3b\u5730\u7ba1\u7406\u865a\u62df\u5185\u5b58\u3002<\/p>\n<p>1. \u5185\u6838\u4e3a\u6bcf\u4e2a\u8fdb\u7a0b\u7ef4\u62a4\u4e86\u4e00\u4e2a\u5355\u72ec\u7684\u4efb\u52a1\u7ed3\u6784 task_struct<\/p>\n<p>2. task_struct\u7684mm\u6307\u9488\u6307\u5411\u4e86mm_struct\uff0c\u8be5\u7ed3\u6784\u63cf\u8ff0\u4e86\u865a\u62df\u5185\u5b58\u7684\u8fd0\u884c\u72b6\u6001<\/p>\n<p>3. mm_struct\u7684pgd\u6307\u9488\u6307\u5411\u8be5\u8fdb\u7a0b\u7684\u4e00\u7ea7\u9875\u8868\u7684\u57fa\u5730\u5740\u3002mmap\u6307\u9488\u6307\u5411\u4e86vm_area_struct\u94fe\u8868<\/p>\n<p>4. vm_area_struct\u662f\u63cf\u8ff0area\u7ed3\u6784\u7684\u4e00\u4e2a\u94fe\u8868\uff0c\u94fe\u8868\u8282\u70b9\u7684\u51e0\u4e2a\u91cd\u8981\u5c5e\u6027\u5982\u4e0b\uff1avm_start\u8868\u793aarea\u7684\u5f00\u59cb\u4f4d\u7f6e\uff0cvm_end\u8868\u793aarea\u7684\u7ed3\u675f\u4f4d\u7f6e\uff0cvm_prot\u63cf\u8ff0\u4e86area\u5185\u7684\u9875\u7684\u8bfb\u5199\u6743\u9650\uff0cvm_flags\u63cf\u8ff0\u8be5area\u5185\u7684\u9875\u9762\u662f\u4e0e\u5176\u4ed6\u8fdb\u7a0b\u5171\u4eab\u8fd8\u662f\u8fdb\u7a0b\u79c1\u6709, vm_next\u6307\u5411\u4e0b\u4e00\u4e2aarea\u8282\u70b9<img decoding=\"async\" src=\"https:\/\/img-blog.csdn.net\/20150112164439556?watermark\/2\/text\/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvSVRlcl9aQw==\/font\/5a6L5L2T\/fontsize\/400\/fill\/I0JBQkFCMA==\/dissolve\/70\/gravity\/Center\" alt=\"\" \/><\/p>\n<p>\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u5f53MMU\u7ffb\u8bd1\u4e00\u4e2a\u865a\u62df\u5730\u5740\u53d1\u751f\u7f3a\u9875\u5f02\u5e38\u65f6\uff0c\u8df3\u8f6c\u5230\u5185\u6838\u7684\u7f3a\u9875\u5f02\u5e38\u5904\u7406\u7a0b\u5e8f\u3002<\/p>\n<p>1. Linux\u7684\u7f3a\u9875\u5f02\u5e38\u5904\u7406\u7a0b\u5e8f\u4f1a\u5148\u68c0\u67e5\u4e00\u4e2a\u865a\u62df\u5730\u5740\u662f\u54ea\u4e2aarea\u5185\u7684\u5730\u5740\u3002\u53ea\u9700\u8981\u6bd4\u8f83\u6240\u6709area\u7ed3\u6784\u7684vm_start\u548cvm_end\u5c31\u53ef\u4ee5\u77e5\u9053\u3002area\u90fd\u662f\u4e00\u4e2a\u8fde\u7eed\u7684\u5757\u3002\u5982\u679c\u8fd9\u4e2a\u865a\u62df\u5730\u5740\u4e0d\u5c5e\u4e8e\u4efb\u4f55\u4e00\u4e2aarea\uff0c\u5c06\u53d1\u751f\u4e00\u4e2a\u6bb5\u9519\u8bef\uff0c\u7ec8\u6b62\u8fdb\u7a0b<\/p>\n<p>2. \u8981\u8bbf\u95ee\u7684\u76ee\u6807\u5730\u5740\u662f\u5426\u6709\u76f8\u5e94\u7684\u8bfb\u5199\u6743\u9650\uff0c\u5982\u679c\u6ca1\u6709\uff0c\u5c06\u89e6\u53d1\u4e00\u4e2a\u4fdd\u62a4\u5f02\u5e38\uff0c\u7ec8\u6b62\u8fdb\u7a0b<\/p>\n<p>3. \u9009\u62e9\u4e00\u4e2a\u727a\u7272\u9875\uff0c\u5982\u679c\u727a\u7272\u9875\u88ab\u4fee\u6539\u8fc7\uff0c\u90a3\u4e48\u628a\u5b83\u4ea4\u6362\u51fa\u53bb\u3002\u4ece\u78c1\u76d8\u52a0\u8f7d\u865a\u62df\u9875\u5185\u5bb9\u5230\u7269\u7406\u9875\uff0c\u66f4\u65b0\u9875\u8868<\/p>\n<p>\u5185\u5b58\u6620\u5c04\u673a\u5236<\/p>\n<p>\u865a\u62df\u5185\u5b58\u7684\u76ee\u6807\u5b58\u50a8\u5668\u662f\u78c1\u76d8\uff0c\u6240\u4ee5\u865a\u62df\u5185\u5b58\u533a\u57df\u662f\u548c\u78c1\u76d8\u4e2d\u7684\u6587\u4ef6\u5bf9\u5e94\u7684\u3002\u521d\u59cb\u5316\u865a\u62df\u5185\u5b58\u533a\u57df\u7684\u5185\u5bb9\u65f6\uff0c\u4f1a\u628a\u865a\u62df\u5185\u5b58\u533a\u57df\u548c\u4e00\u4e2a\u78c1\u76d8\u6587\u4ef6\u5bf9\u8c61\u5bf9\u5e94\u8d77\u6765\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u53eb\u5185\u5b58\u6620\u5c04(memory mapping)\u3002\u865a\u62df\u5185\u5b58\u53ef\u4ee5\u6620\u5c04\u7684\u78c1\u76d8\u6587\u4ef6\u5bf9\u8c61\u5305\u62ec\u4e24\u79cd\uff1a<\/p>\n<p>1. 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