{"id":44525,"date":"2025-06-19T09:28:04","date_gmt":"2025-06-19T01:28:04","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/44525.html"},"modified":"2025-06-19T09:28:04","modified_gmt":"2025-06-19T01:28:04","slug":"6-15-%e6%93%8d%e4%bd%9c%e7%b3%bb%e7%bb%9f%e9%9d%a2%e8%af%95%e9%a2%98-%e9%94%81-%e5%86%85%e5%ad%98%e7%ae%a1%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/44525.html","title":{"rendered":"6.15 \u64cd\u4f5c\u7cfb\u7edf\u9762\u8bd5\u9898 \u9501 \u5185\u5b58\u7ba1\u7406"},"content":{"rendered":"<h2>\u81ea\u65cb\u9501<\/h2>\n<p>\u81ea\u65cb\u9501\u52a0\u9501\u5931\u8d25\u540e&#xff0c;\u7ebf\u7a0b\u4f1a\u5fd9\u7b49\u5f85&#xff0c;\u76f4\u5230\u5b83\u62ff\u5230\u9501\u3002 \u9700\u8981\u6ce8\u610f&#xff0c;\u5728\u5355\u6838 CPU \u4e0a&#xff0c;\u9700\u8981\u62a2\u5360\u5f0f\u7684\u8c03\u5ea6\u5668&#xff08;\u5373\u4e0d\u65ad\u901a\u8fc7\u65f6\u949f\u4e2d\u65ad\u4e00\u4e2a\u7ebf\u7a0b&#xff0c;\u8fd0\u884c\u5176\u4ed6\u7ebf\u7a0b&#xff09;\u3002\u5426\u5219&#xff0c;\u81ea\u65cb\u9501\u5728\u5355 CPU \u4e0a\u65e0\u6cd5\u4f7f\u7528&#xff0c;\u56e0\u4e3a\u4e00\u4e2a\u81ea\u65cb\u7684\u7ebf\u7a0b\u6c38\u8fdc\u4e0d\u4f1a\u653e\u5f03 CPU\u3002 \u5f53\u52a0\u9501\u5931\u8d25\u65f6&#xff0c;\u4e92\u65a5\u9501\u7528\u300c\u7ebf\u7a0b\u5207\u6362\u300d\u6765\u5e94\u5bf9&#xff0c;\u81ea\u65cb\u9501\u5219\u7528\u300c\u5fd9\u7b49\u5f85\u300d\u6765\u5e94\u5bf9\u3002 \u5982\u679c\u4f60\u80fd\u786e\u5b9a\u88ab\u9501\u4f4f\u7684\u4ee3\u7801\u6267\u884c\u65f6\u95f4\u5f88\u77ed&#xff0c;\u5c31\u4e0d\u5e94\u8be5\u7528\u4e92\u65a5\u9501&#xff0c;\u800c\u5e94\u8be5\u9009\u7528\u81ea\u65cb\u9501&#xff0c;\u5426\u5219\u4f7f\u7528\u4e92\u65a5\u9501\u3002<\/p>\n<h2>\u6b7b\u9501\u53d1\u751f\u6761\u4ef6\u662f\u4ec0\u4e48&#xff1f;<\/h2>\n<ul>\n<li>\u4e92\u65a5\u6761\u4ef6<\/li>\n<li>\u6301\u6709\u5e76\u7b49\u5f85<\/li>\n<li>\u4e0d\u53ef\u5265\u593a\u6761\u4ef6<\/li>\n<li>\u73af\u8def\u7b49\u5f85 \u8d44\u6e90\u6709\u5e8f\u5206\u914d\u6cd5<\/li>\n<\/ul>\n<h2>\u94f6\u884c\u5bb6\u7b97\u6cd5<\/h2>\n<p>\u94f6\u884c\u5bb6\u7b97\u6cd5\u662f\u6700\u6709\u4ee3\u8868\u6027\u7684\u907f\u514d\u6b7b\u9501\u7684\u7b97\u6cd5\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250619012758-6853679eb706f.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u5206\u914d\u7ed9\u8fdb\u7a0b\u8d44\u6e90\u524d&#xff0c;\u9996\u5148\u5224\u65ad\u8fd9\u4e2a\u8fdb\u7a0b\u7684\u5b89\u5168\u6027&#xff0c;\u4e5f\u5c31\u662f\u9884\u6267\u884c&#xff0c;\u5224\u65ad\u5206\u914d\u540e\u662f\u5426\u4ea7\u751f\u6b7b\u9501\u73b0\u8c61\u3002\u901a\u8fc7\u4e0d\u65ad\u68c0\u67e5\u5269\u4f59\u53ef\u7528\u8d44\u6e90\u662f\u5426\u6ee1\u8db3\u67d0\u4e2a\u8fdb\u7a0b\u7684\u6700\u5927\u9700\u6c42&#xff0c;\u5982\u679c\u53ef\u4ee5\u5219\u52a0\u5165\u5b89\u5168\u5e8f\u5217&#xff0c;\u5e76\u628a\u8be5\u8fdb\u7a0b\u5f53\u524d\u6301\u6709\u7684\u8d44\u6e90\u56de\u6536&#xff1b;\u4e0d\u65ad\u91cd\u590d\u8fd9\u4e2a\u8fc7\u7a0b&#xff0c;\u770b\u6700\u540e\u80fd\u5426\u5b9e\u73b0\u8ba9\u6240\u6709\u8fdb\u7a0b\u90fd\u52a0\u5165\u5b89\u5168\u5e8f\u5217\u3002<\/p>\n<h2>\u4ecb\u7ecd\u4e00\u4e0b\u64cd\u4f5c\u7cfb\u7edf\u5185\u5b58\u7ba1\u7406<\/h2>\n<p>\u64cd\u4f5c\u7cfb\u7edf\u8bbe\u8ba1\u4e86\u865a\u62df\u5185\u5b58&#xff0c;\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u6709\u81ea\u5df1\u7684\u72ec\u7acb\u7684\u865a\u62df\u5185\u5b58&#xff0c;\u6211\u4eec\u6240\u5199\u7684\u7a0b\u5e8f\u4e0d\u4f1a\u76f4\u63a5\u4e0e\u7269\u7406\u5185\u6253\u4ea4\u9053\u3002 \u5206\u9875\u662f\u628a\u6574\u4e2a\u865a\u62df\u548c\u7269\u7406\u5185\u5b58\u7a7a\u95f4\u5207\u6210\u4e00\u6bb5\u6bb5\u56fa\u5b9a\u5c3a\u5bf8\u7684\u5927\u5c0f\u3002 \u865a\u62df\u5730\u5740\u4e0e\u7269\u7406\u5730\u5740\u4e4b\u95f4\u901a\u8fc7\u9875\u8868\u6765\u6620\u5c04\u3002 \u9875\u8868\u662f\u5b58\u50a8\u5728\u5185\u5b58\u91cc\u7684&#xff0c;\u5185\u5b58\u7ba1\u7406\u5355\u5143 &#xff08;MMU&#xff09;\u5c31\u505a\u5c06\u865a\u62df\u5185\u5b58\u5730\u5740\u8f6c\u6362\u6210\u7269\u7406\u5730\u5740\u7684\u5de5\u4f5c\u3002 \u8bbf\u95ee\u7684\u865a\u62df\u5730\u5740\u5728\u9875\u8868\u4e2d\u67e5\u4e0d\u5230\u65f6&#xff0c;\u7cfb\u7edf\u4f1a\u4ea7\u751f\u4e00\u4e2a\u7f3a\u9875\u5f02\u5e38&#xff0c;\u8fdb\u5165\u7cfb\u7edf\u5185\u6838\u7a7a\u95f4\u5206\u914d\u7269\u7406\u5185\u5b58\u3001\u66f4\u65b0\u8fdb\u7a0b\u9875\u8868&#xff0c;\u6700\u540e\u518d\u8fd4\u56de\u7528\u6237\u7a7a\u95f4&#xff0c;\u6062\u590d\u8fdb\u7a0b\u7684\u8fd0\u884c\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250619012758-6853679ec5d37.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u5206\u9875\u4e0d\u4f1a\u6709\u5916\u90e8\u788e\u7247&#xff0c;\u4f46\u4f1a\u6709\u5185\u90e8\u788e\u7247 \u9875\u53f7&#043;\u504f\u79fb\u91cf<\/p>\n<h2>\u8bb2\u4e00\u4e0b\u6bb5\u8868&#xff1f;<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250619012759-6853679f00f47.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u865a\u62df\u5730\u5740\u4e5f\u53ef\u4ee5\u901a\u8fc7\u6bb5\u8868\u4e0e\u7269\u7406\u5730\u5740\u8fdb\u884c\u6620\u5c04\u7684&#xff0c;\u5206\u6bb5\u673a\u5236\u4f1a\u628a\u7a0b\u5e8f\u7684\u865a\u62df\u5730\u5740\u5206\u6210 4 \u4e2a\u6bb5&#xff0c;\u6bcf\u4e2a\u6bb5\u5728\u6bb5\u8868\u4e2d\u6709\u4e00\u4e2a\u9879&#xff0c;\u5728\u8fd9\u4e00\u9879\u627e\u5230\u6bb5\u7684\u57fa\u5730\u5740&#xff0c;\u518d\u52a0\u4e0a\u504f\u79fb\u91cf\u3002<\/p>\n<h2>\u865a\u62df\u5730\u5740\u662f\u600e\u4e48\u8f6c\u5316\u5230\u7269\u7406\u5730\u5740\u7684&#xff1f;<\/h2>\n<p>\u5728\u865a\u62df\u5730\u5740\u8f6c\u6362\u7684\u8fc7\u7a0b\u4e2d&#xff0c;\u901a\u5e38\u4f1a\u4f7f\u7528\u9875\u8868&#xff08;Page Table&#xff09;\u6765\u8fdb\u884c\u6620\u5c04\u3002\u5f53\u7a0b\u5e8f\u8bbf\u95ee\u4e00\u4e2a\u865a\u62df\u5730\u5740\u65f6&#xff0c;MMU\u4f1a\u5c06\u865a\u62df\u5730\u5740\u5206\u89e3\u4e3a\u9875\u53f7\u548c\u9875\u5185\u504f\u79fb\u91cf\u3002<\/p>\n<h2>\u7a0b\u5e8f\u7684\u5185\u5b58\u5e03\u5c40\u662f\u600e\u4e48\u6837\u7684&#xff1f;<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250619012759-6853679f5604d.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<ul>\n<li>\u4ee3\u7801\u6bb5&#xff0c;\u5305\u62ec\u4e8c\u8fdb\u5236\u53ef\u6267\u884c\u4ee3\u7801&#xff1b;<\/li>\n<li>\u6570\u636e\u6bb5&#xff0c;\u5305\u62ec\u5df2\u521d\u59cb\u5316\u7684\u9759\u6001\u5e38\u91cf\u548c\u5168\u5c40\u53d8\u91cf&#xff1b;<\/li>\n<li>BSS \u6bb5&#xff0c;\u5305\u62ec\u672a\u521d\u59cb\u5316\u7684\u9759\u6001\u53d8\u91cf\u548c\u5168\u5c40\u53d8\u91cf&#xff1b;<\/li>\n<li>\u5806\u6bb5&#xff0c;\u5305\u62ec\u52a8\u6001\u5206\u914d\u7684\u5185\u5b58&#xff0c;\u4ece\u4f4e\u5730\u5740\u5f00\u59cb\u5411\u4e0a\u589e\u957f&#xff1b;<\/li>\n<li>\u6587\u4ef6\u6620\u5c04\u6bb5&#xff0c;\u5305\u62ec\u52a8\u6001\u5e93\u3001\u5171\u4eab\u5185\u5b58\u7b49&#xff1b;<\/li>\n<li>\u6808\u6bb5&#xff0c;\u5305\u62ec\u5c40\u90e8\u53d8\u91cf\u548c\u51fd\u6570\u8c03\u7528\u7684\u4e0a\u4e0b\u6587\u7b49\u3002\u6808\u7684\u5927\u5c0f\u662f\u56fa\u5b9a\u7684&#xff0c;\u4e00\u822c\u662f 8 MB\u3002<\/li>\n<\/ul>\n<h2>\u5806\u548c\u6808\u7684\u533a\u522b&#xff1f;<\/h2>\n<ul>\n<li>\u5806\u662f\u52a8\u6001\u5206\u914d\u5185\u5b58&#xff0c;\u7531\u7a0b\u5e8f\u5458\u624b\u52a8\u7533\u8bf7\u548c\u91ca\u653e\u5185\u5b58&#xff0c;\u901a\u5e38\u7528\u4e8e\u5b58\u50a8\u52a8\u6001\u6570\u636e\u7ed3\u6784\u548c\u5bf9\u8c61\u3002\u5982\u679c\u7ba1\u7406\u4e0d\u5f53\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u6216\u5185\u5b58\u6ea2\u51fa\u3002\u5806\u901a\u5e38\u6bd4\u6808\u5927&#xff0c;\u5185\u5b58\u7a7a\u95f4\u8f83\u5927&#xff0c;\u52a8\u6001\u5206\u914d\u548c\u91ca\u653e\u5185\u5b58\u9700\u8981\u65f6\u95f4\u5f00\u9500\u3002<\/li>\n<li>\u6808\u662f\u9759\u6001\u5206\u914d\u5185\u5b58&#xff0c;\u7531\u7f16\u8bd1\u5668\u81ea\u52a8\u5206\u914d\u548c\u91ca\u653e\u5185\u5b58&#xff0c;\u7528\u4e8e\u5b58\u50a8\u51fd\u6570\u7684\u5c40\u90e8\u53d8\u91cf\u548c\u51fd\u6570\u8c03\u7528\u4fe1\u606f\u3002\u9075\u5faa\u540e\u8fdb\u5148\u51fa\u7684\u539f\u5219&#xff0c;\u53d8\u91cf\u7684\u751f\u547d\u5468\u671f\u7531\u5176\u4f5c\u7528\u57df\u51b3\u5b9a&#xff0c;\u51fd\u6570\u8c03\u7528\u65f6\u5206\u914d\u5185\u5b58&#xff0c;\u51fd\u6570\u8fd4\u56de\u65f6\u91ca\u653e\u5185\u5b58\u3002\u6808\u5927\u5c0f\u6709\u9650&#xff0c;\u901a\u5e38\u6bd4\u8f83\u5c0f&#xff0c;\u5185\u5b58\u5206\u914d\u548c\u91ca\u653e\u901f\u5ea6\u8f83\u5feb&#xff0c;\u56e0\u4e3a\u662f\u7f16\u8bd1\u5668\u81ea\u52a8\u7ba1\u7406\u3002<\/li>\n<\/ul>\n<h2>fork()\u4f1a\u590d\u5236\u54ea\u4e9b\u4e1c\u897f&#xff1f;<\/h2>\n<p>fork \u9636\u6bb5\u4f1a\u590d\u5236\u7236\u8fdb\u7a0b\u7684\u9875\u8868&#xff08;\u865a\u62df\u5185\u5b58&#xff09; fork \u4e4b\u540e&#xff0c;\u5982\u679c\u53d1\u751f\u4e86\u5199\u65f6\u590d\u5236&#xff0c;\u5c31\u4f1a\u590d\u5236\u7269\u7406\u5185\u5b58 \u5f53\u7236\u8fdb\u7a0b\u6216\u8005\u5b50\u8fdb\u7a0b\u5728\u5411\u8fd9\u4e2a\u5185\u5b58\u53d1\u8d77\u5199\u64cd\u4f5c\u65f6&#xff0c;CPU \u5c31\u4f1a\u89e6\u53d1\u5199\u4fdd\u62a4\u4e2d\u65ad&#xff0c;\u8fd9\u4e2a\u5199\u4fdd\u62a4\u4e2d\u65ad\u662f\u7531\u4e8e\u8fdd\u53cd\u6743\u9650\u5bfc\u81f4\u7684&#xff0c;\u7136\u540e\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u5728\u300c\u5199\u4fdd\u62a4\u4e2d\u65ad\u5904\u7406\u51fd\u6570\u300d\u91cc\u8fdb\u884c\u7269\u7406\u5185\u5b58\u7684\u590d\u5236&#xff0c;\u5e76\u91cd\u65b0\u8bbe\u7f6e\u5176\u5185\u5b58\u6620\u5c04\u5173\u7cfb&#xff0c;\u5c06\u7236\u5b50\u8fdb\u7a0b\u7684\u5185\u5b58\u8bfb\u5199\u6743\u9650\u8bbe\u7f6e\u4e3a\u53ef\u8bfb\u5199&#xff0c;\u6700\u540e\u624d\u4f1a\u5bf9\u5185\u5b58\u8fdb\u884c\u5199\u64cd\u4f5c\u3002<\/p>\n<h2>malloc 1KB\u548c1MB \u6709\u4ec0\u4e48\u533a\u522b&#xff1f;<\/h2>\n<p>\u5982\u679c\u7528\u6237\u5206\u914d\u7684\u5185\u5b58\u5c0f\u4e8e 128 KB&#xff0c;\u5219\u901a\u8fc7 brk() \u7533\u8bf7\u5185\u5b58&#xff1b; \u5982\u679c\u7528\u6237\u5206\u914d\u7684\u5185\u5b58\u5927\u4e8e 128 KB&#xff0c;\u5219\u901a\u8fc7 mmap() \u7533\u8bf7\u5185\u5b58&#xff1b; brk() \u51fd\u6570\u5c06\u300c\u5806\u9876\u300d\u6307\u9488\u5411\u9ad8\u5730\u5740\u79fb\u52a8&#xff0c;\u83b7\u5f97\u65b0\u7684\u5185\u5b58\u7a7a\u95f4\u3002 mmap() \u7cfb\u7edf\u8c03\u7528\u4e2d\u300c\u79c1\u6709\u533f\u540d\u6620\u5c04\u300d\u7684\u65b9\u5f0f&#xff0c;\u5728\u6587\u4ef6\u6620\u5c04\u533a\u5206\u914d\u4e00\u5757\u5185\u5b58 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250619012801-685367a1e2933.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250619012802-685367a24bdfe.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" 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