{"id":1611,"date":"2020-09-16T00:50:39","date_gmt":"2020-09-15T16:50:39","guid":{"rendered":"http:\/\/149.129.74.185\/?p=1611"},"modified":"2020-09-16T00:50:39","modified_gmt":"2020-09-15T16:50:39","slug":"cache-%e5%92%8c-buffer-%e9%97%ae%e9%a2%98%e6%80%bb%e7%bb%93","status":"publish","type":"post","link":"http:\/\/www.magicmipamipa.com\/?p=1611","title":{"rendered":"Cache \u548c Buffer \u95ee\u9898\u603b\u7ed3"},"content":{"rendered":"

\u4eca\u5929\u9762\u8bd5\u88ab\u95ee\u5230\u4e86\u6709\u5173Cache\u548cBuffer\u7684\u95ee\u9898\uff0c\u56de\u7b54\u7684\u4e0d\u662f\u5f88\u597d\uff0c\u5f88\u591a\u95ee\u9898\u662f\u6d41\u4e8e\u8868\u8c61\u7684\u3002\u9762\u8bd5\u5b98\u7ed9\u6211\u95ee\u4e86\u4e24\u4e2a\u6700\u6838\u5fc3\u7684\u95ee\u9898\u201c\u4ed6\u4eec\u90fd\u662f\u7528\u4e8e\u89e3\u51b3\u4ec0\u4e48\u95ee\u9898\u7684\u201d\uff0c\u6211\u53ea\u4e86\u89e3\u5e94\u7528\u573a\u666f\u5374\u6ca1\u529e\u6cd5\u603b\u7ed3\u51fa\u6765\u4e00\u4e2a\u6838\u5fc3\u95ee\u9898\uff0c\u8fd8\u662f\u5bf9\u8fd9\u4e24\u4e2a\u6982\u5ff5\u505c\u7559\u5728\u6bd4\u8f83\u6d45\u7684\u7406\u89e3\u4e0a\uff0c\u4e8e\u662f\u603b\u7ed3\u4e86\u4e00\u4e0b\u7f51\u4e0a\u7684\u90e8\u5206\u8d44\u6599\uff0c\u5bf9\u8fd9\u4e24\u4e2a\u6982\u5ff5\u6709\u4e86\u6bd4\u8f83\u6df1\u7684\u8ba4\u8bc6\u3002<\/span><\/p><\/blockquote>\n

    \n
  1. \u4ec0\u4e48\u662f Cache\uff1f\n

    Cache \u662f\u9ad8\u901f\u7f13\u5b58\u3002<\/li>\n

  2. Cache \u89e3\u51b3\u95ee\u9898\u7684\u539f\u7406\uff1f\n

    \u6570\u636e\u7684\u65f6\u95f4\u5c40\u90e8\u6027\u548c\u7a7a\u95f4\u5c40\u90e8\u6027\u3002<\/li>\n

  3. Cache \u7528\u6765\u89e3\u51b3\u4ec0\u4e48\u95ee\u9898\uff1f\n

    \u89e3\u51b3\u9ad8\u901f CPU \u548c\u76f8\u5bf9\u4f4e\u901f\u4e3b\u5b58\u7684\u901f\u5ea6\u74f6\u9888\u800c\u8bbe\u8ba1\u7684\u3002Cache \u7684\u5b58\u5728\uff0c\u662f\u56e0\u4e3a\u5bc4\u5b58\u5668\u548c DDR \u4e4b\u95f4\u901f\u5ea6\u5dee\u5f02\u592a\u5927\uff0cDDR \u7684\u901f\u5ea6\u8fdc\u4e0d\u80fd\u6ee1\u8db3\u5bc4\u5b58\u5668\u7684\u9700\u8981\uff08\u4e0d\u80fd\u6ee1\u8db3 CPU \u7684\u9700\u8981\uff0c\u6240\u4ee5\u6ca1\u6709 Cache \u4f1a\u62c9\u4f4e\u6574\u4e2a\u7cfb\u7edf\u7684\u6574\u4f53\u901f\u5ea6\uff09<\/li>\n

  4. \u4ec0\u4e48\u65f6\u5019\u7528\u4e0d\u5230 Cache\uff1f\n

    \u5047\u5b9a\u4ee5\u540e\u5b58\u50a8\u5668\u8bbf\u95ee\u53d8\u5f97\u8ddfCPU\u505a\u8ba1\u7b97\u4e00\u6837\u5feb\uff0cCache \u5c31\u53ef\u4ee5\u6d88\u5931\u3002<\/li>\n

  5. \u4ec0\u4e48\u662f Buffer\uff1f\n

    \u7f13\u51b2\u533a\uff0c\u7528\u4e8e\u5b58\u50a8\u901f\u5ea6\u4e0d\u540c\u6b65\u7684\u8bbe\u5907\u6216\u4f18\u5148\u7ea7\u4e0d\u540c\u7684\u8bbe\u5907\u4e4b\u95f4\u4f20\u8f93\u6570\u636e\uff0c\u901a\u8fc7 Buffer \u53ef\u4ee5\u51cf\u5c11\u8fdb\u7a0b\u95f4\u901a\u4fe1\u9700\u8981\u7b49\u5f85\u7684\u65f6\u95f4\uff0c\u5f53\u5b58\u50a8\u901f\u5ea6\u5feb\u7684\u8bbe\u5907\u4e0e\u5b58\u50a8\u901f\u5ea6\u6162\u7684\u8bbe\u5907\u8fdb\u884c\u901a\u4fe1\u65f6\uff0c\u5b58\u50a8\u5feb\u7684\u8bbe\u5907\u5148\u628a\u6570\u636e\u7f13\u5b58\u5230 Buffer \u4e0a\uff0c\u7b49\u5230\u7cfb\u7edf\u7edf\u4e00\u628a Buffer \u4e0a\u7684\u6570\u636e\u5199\u5230\u901f\u5ea6\u6162\u7684\u8bbe\u5907\u4e0a\u3002\u5e38\u89c1\u7684\u6709\u628a\u5185\u5b58\u7684\u6570\u636e\u5f80\u78c1\u76d8\u4e0a\u8fdb\u884c\u5199\u7684\u64cd\u4f5c\u3002<\/li>\n

  6. Buffer \u7528\u6765\u89e3\u51b3\u4ec0\u4e48\u95ee\u9898\uff1f\n

    Buffer \u7684\u4e3b\u8981\u76ee\u7684\u8fdb\u884c\u6d41\u91cf\u6574\u5f62\uff0c\u628a\u7a81\u53d1\u7684\u5927\u6570\u91cf\u8f83\u5c0f\u89c4\u6a21\u7684 I\/O \u6574\u7406\u6210\u5e73\u7a33\u7684\u5c0f\u6570\u91cf\u8f83\u5927\u89c4\u6a21\u7684 I\/O\uff0c\u4ee5\u51cf\u5c11\u54cd\u5e94\u6b21\u6570\u3002<\/li>\n

  7. Cache \u548c Buffer \u7684\u533a\u522b\uff1f\n

    Cache \u662f\u628a\u6700\u5e38\u7528\u7684\u5de5\u5177\u653e\u5728\u624b\u8fb9\uff0cBuffer \u662f\u4f60\u5bb6\u7684\u5783\u573e\u6876\uff0c\u4f60\u5e73\u65f6\u7684\u5783\u573e\u5148\u6254\u5728\u5783\u573e\u6876\u91cc\uff0c\u7b49\u5783\u573e\u6876\u6ee1\u4e86\u518d\u6254\u5783\u573e\u3002<\/p>\n

    Buffer\u5e76\u975e\u7528\u4e8e\u63d0\u9ad8\u6027\u80fd\uff0c\u800cCache\u7684\u76ee\u7684\u5219\u662f\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n

    \u4e00\u4e2a\u7528\u4e8e\u7a33\u5b9a\u6d41\u91cf\uff0c\u4e00\u4e2a\u7528\u4e8e\u63d0\u9ad8\u6027\u80fd\u3002<\/span><\/p><\/blockquote>\n

     <\/p>\n

    \u5927\u90e8\u5206\u573a\u666f\u4e2d\uff0cBuffer\u662f\u7279\u6307\u5185\u5b58\u4e2d\u4e34\u65f6\u5b58\u653e\u7684IO\u8bbe\u5907\u6570\u636e\u2014\u2014\u5305\u62ec\u8bfb\u53d6\u548c\u5199\u5165\uff1b\u800cCache\u7684\u7528\u5904\u5f88\u591a\u2014\u2014\u5f88\u591aIO\u8bbe\u5907\uff08\u4f8b\u5982\u786c\u76d8\u3001RAID\u5361\uff09\u4e0a\u90fd\u6709Cache\uff0cCPU\u5185\u90e8\u4e5f\u6709Cache\uff0c\u6d4f\u89c8\u5668\u4e5f\u6709Cache\u3002<\/p>\n

    Buffer\u5360\u7528\u7684\u5185\u5b58\u4e0d\u80fd\u56de\u6536\uff0c\u5982\u679c\u88ab\u5f3a\u884c\u56de\u6536\u4f1a\u51fa\u73b0IO\u9519\u8bef\u3002Cache\u5360\u7528\u7684\u5185\u5b58\uff0c\u9664\u5b9e\u73b0Buffer\u7684\u90e8\u5206\u5916\u90fd\u53ef\u4ee5\u56de\u6536\uff0c\u4ee3\u4ef7\u5219\u662f\u4e0b\u4e00\u6b21\u8bfb\u53d6\u9700\u8981\u4ece\u6570\u636e\u7684\u539f\u59cb\u4f4d\u7f6e\uff08\u901a\u5e38\u662f\u6027\u80fd\u66f4\u4f4e\u7684\u8bbe\u5907\uff09\u8bfb\u53d6\u3002<\/li>\n

  8. Cache \u548c Buffer \u7684\u5171\u540c\u70b9\uff1f\n

    Buffer \u548c Cache \u90fd\u662f\u4e3a\u4e86\u89e3\u51b3\u4e92\u8bbf\u7684\u4e24\u79cd\u8bbe\u5907\u5b58\u5728\u901f\u7387\u5dee\u5f02\uff0c\u4f7f\u78c1\u76d8\u7684 IO \u7684\u8bfb\u5199\u6027\u80fd\u6216Cpu \u66f4\u52a0\u9ad8\u6548\uff0c\u51cf\u5c11\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7b49\u5f85\u7684\u65f6\u95f4\u3002<\/li>\n<\/ol>\n

    \n

    \u603b\u7ed3\uff1a\u95ee\u9898\u7684\u6838\u5fc3\u6c38\u8fdc\u662f\u201c\u4e3a\u4ec0\u4e48\u8fd9\u4e48\u505a\u201d\uff0c\u7528\u8fd9\u79cd\u65b9\u6cd5\u5b66\u4e60\u6765\u7406\u89e3\u8ba1\u7b97\u673a\u5b66\u79d1\u95ee\u9898\u4e2d\u7684\u4e00\u4e9b\u89e3\u51b3\u601d\u60f3\u4f1a\u66f4\u901a\u987a\u597d\u61c2\u3002\u6bd4\u5982\u9762\u8bd5\u65f6\u6709\u88ab\u95ee\u5230\u201c\u5f53\u78c1\u76d8\u8bfb\u5199\u8db3\u591f\u6162\u7684\u65f6\u5019\uff0c\u8fd8\u6709 Buffer \u5b58\u5728\u7684\u5fc5\u8981\u5417\uff1f\u201d\u5c31\u50cf\u662f\u7f13\u51b2\u4e00\u4e2a\u89c6\u9891\uff0c\u7f51\u7edc\u4e0b\u8f7d\u662f\u5f88\u6162\u7684\uff0c\u6b64\u65f6\u7684\u7f13\u51b2\u533a\u5c31\u65e0\u6cd5\u8d77\u5230\u7f13\u51b2\u7684\u4f5c\u7528\uff0c\u56e0\u4e3a Buffer \u53ea\u80fd\u505a\u5230\u4e00\u4e2a\u6d41\u91cf\u6574\u5f62\uff08\u5982\u4fdd\u8bc1\u89c6\u9891\u4e00\u76f4\u6709\u52a0\u8f7d\u4e0d\u4f1a\u5361\u987f\u3001\u51cf\u5c11 I\/O \u6b21\u6570\uff09\uff0c\u800c\u4e0d\u80fd\u6539\u53d8\u786c\u4ef6\u672c\u8eab\u7684\u6027\u8d28\uff08\u6bd4\u5982\u7f51\u7edc\u901f\u5ea6\u3001\u786c\u76d8\u8bfb\u5199\u901f\u5ea6\uff09\u3002<\/p>\n

    \u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

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