{"id":1693,"date":"2020-09-09T02:13:31","date_gmt":"2020-09-08T18:13:31","guid":{"rendered":"https:\/\/blog.dynox.cn\/?p=1693"},"modified":"2023-08-07T02:18:29","modified_gmt":"2023-08-06T18:18:29","slug":"cache%e7%9b%b8%e8%81%94%e5%ba%a6%e6%b5%8b%e9%87%8f","status":"publish","type":"post","link":"https:\/\/blog.dynox.cn\/?p=1693","title":{"rendered":"Cache\u76f8\u8054\u5ea6\u6d4b\u91cf"},"content":{"rendered":"<div class=\"gruber-markdown\"><p>\u4ece\u4e0a\u7bc7\u6587\u7ae0\u4e2d\u6211\u4eec\u5f97\u77e5Cache\u5728\u517c\u987e\u6027\u80fd\u53ca\u6210\u672c\u540e\u90fd\u662f\u8bbe\u8ba1\u6210\u7ec4\u76f8\u8054\u65b9\u5f0f\u7684\uff0c\u4ee5Intel Pentinum 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Cache\u662f8\u8def\u7ec4\u7684\uff0c\u5c31\u662f\u8bf4\u53ef\u5bb9\u7eb38\u4e2a\u6765\u81ea\u4e0d\u540c\u9875\u9762\u7684Cache Line\uff0c\u5982\u679c\u518d\u8bbf\u95ee\u7b2c9\u4e2a\u5185\u5b58\u9875\u7684\u8bdd\uff0cCPU\u5c06\u4e0d\u5f97\u4e0d\u9a71\u9010\u4e00\u4e2aCache Line\uff0c\u4ece\u800c\u5bfc\u81f4\u5ea6\u91cf\u7b2c\u4e8c\u6761\u6307\u9488\u94fe\u65f6\u8bbf\u95ee\u5ef6\u65f6\u7684\u589e\u52a0\u3002<\/p>\n<h1>\u6d4b\u91cf\u7ed3\u679c<\/h1>\n<p><img decoding=\"async\" src=\"https:\/\/\/blog.dynox.cn\/wp-content\/uploads\/2020\/09\/CPU-Cache-Hierarchy.jpg\" alt=\"Cache \u76f8\u8054\u5ea6\u6d4b\u91cf\u7ed3\u679c\" 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Size\u4e3a32K\uff0c\u5f53\u63a2\u6d4b\u7ec4\u6570\u8d85\u8fc732\u7ec4\u65f6\u4f1a\u53d1\u751f\u6324\u51fa\u6548\u5e94\uff0c\u540c\u74062K\/4K\u5206\u522b\u662f16\u7ec4\u53ca8\u7ec4\u7684\u63a2\u6d4b\u4f4d\u7f6e\u51fa\u73b0\u5206\u53c9<\/p>\n<p>3\uff0c\u625332K\u7684\u7b2c\u4e00\u4e2a\u5206\u53c9\u70b9\uff1a8\uff0c\u8fd9\u65f6\u8bf4\u660e\u4ee532K\u4e3a\u6b65\u957f\u7684\u8bdd\uff0c\u540c\u65f6\u8bbf\u95ee\u8d85\u8fc78\u7ec4\u7684\u8bdd\u4f1a\u5bfc\u81f4\u65f6\u5ef6\u53d8\u957f\uff0c\u76f4\u63a5\u8df3\u5230\u4e86\u6700\u9ad8\u53f0\u9636\uff0c\u8bf4\u660eL1 Cache\u662f8\u8def\u5206\u7ec4\u7684<\/p>\n<p>4\uff0c\u4ece\u7b2c\u4e8c\u4e2a\u53f0\u9636\u6c34\u5e73 \uff0c\u4ece\u6700\u53f3\u8fb9\u5411\u6700\u5de6\u5206\u522b\u627e\u523032 <em> 8K\u53ca16 <\/em> 16K\u4e24\u4e2a\u5206\u53c9\u70b9\uff0c\u5373256K\u7684\u5bb9\u91cf<\/p>\n<p>5\uff0c\u7136\u540e\u4ee5256K\u7684\u7ebf\u4ece\u6700\u5de6\u4fa7\u5411\u53f3\u5bfb\u627e\u8dc3\u5347\u70b9\uff0c\u5206\u522b\u57284\u548c8\u7684\u4f4d\u7f6e\u8dc3\u5347\uff0c\u8bf4\u660eL2\u662f4\u8def\u5206\u7ec4\u7684\u3002\u90a3\u4e3a\u4ec0\u4e48\u4f1a\u57288\u7684\u4f4d\u7f6e\u4e5f\u51fa\u73b0\u8dc3\u5347\u5462\uff1f\u5927\u5bb6\u53ef\u4ee5\u81ea\u5df1\u60f3\u4e00\u60f3<\/p>\n<h1>\u7279\u6b8a\u7684LLC<\/h1>\n<p>\u4ece\u4e0a\u56fe\u4e2d\u6765\u770bL3\uff0c\u7591\u4f3cL3\u7684\u53f0\u9636\u4ece\u53f3\u5411\u5de6\u53ea\u5728256K\u7684\u7ebf\u53d1\u751f\u4e86\u8dc3\u5347\uff0c\u8dc3\u5347\u70b9\u662f32\uff0c\u537332 * 256K = 4M; \u7136\u540e\u518d\u627e4M\u7684\u7ebf\uff0c\u7ed3\u679c4M\u7684\u7ebf\u53ea\u57284\u548c8\u70b9\u6709\u8dc3\u5347\uff0c\u7136\u540e\u4e00\u76f4\u5e73\u7a33\u5728L3\u7684\u53f0\u9636\u4e0a\u30028M\u7684\u7ebf\u4ea6\u540c\u6837\uff0c\u4e0eL1\u53caL2\u76f8\u5bf9\u5448\u73b0\u51fa\u4e86\u4e0d\u540c\u7684\u89c4\u5f8b\u3002<\/p>\n<p>\u5176\u5b9e\u539f\u56e0\u5728\u4e8eL3\u5373LLC\u91c7\u7528\u4e86\u4e0d\u540c\u7684\u5206\u7ec4hash\u8ba1\u7b97\u65b9\u5f0f\u53ca\u4e0d\u540c\u7684\u66ff\u6362\u7b56\u7565\uff0c\u4ee5\u81f4\u5f53\u524d\u7684\u63a2\u6d4b\u65b9\u5f0f\u4e0d\u518d\u9002\u7528\u3002\u4f46\u6211\u4eec\u4f9d\u7136\u53ef\u4ee5\u505a\u4e2a\u731c\u6d4b\uff0c\u6bd4\u5982 32K\u300164K\u3001128K\u7684\u76f4\u63a5\u8d8a\u8fc7\u4e86L3\uff0c\u8bf4\u660e\u4e86\u4ec0\u4e48\u95ee\u9898\uff1f\u5f5332K\u300164K\u3001128K\u8d85\u8fc78\u7ec4\u7684\u65f6\u5c31\u5df2\u7ecf\u8d85\u51fa\u4e86L3\u7684\u7ec4\u5bb9\u91cf\uff0c\u5373\u4ea7\u751f\u4e86\u6324\u51fa\u6548\u5e94\uff0c\u4ece\u800c\u9020\u6210\u4e86\u76f4\u63a5\u5185\u5b58\u8bbf\u95ee\u7684\u5c40\u9762\u3002\u5173\u4e8eLLC\u7684\u6620\u5c04\u7b97\u6cd5\u53ca\u66ff\u6362\u7b56\u7565\u53ef\u4ee5\u53c2\u89c1\u6587\u672b\u7684\u53c2\u8003\u94fe\u63a5\uff0c\u7b49\u540e\u7eed\u6709\u65f6\u95f4\u6211\u518d\u8fdb\u884c\u8be6\u7ec6\u89e3\u8bfb\u3002<\/p>\n<h1>\u53c2\u8003\u94fe\u63a5<\/h1>\n<ul>\n<li><a href=\"https:\/\/s3.eurecom.fr\/docs\/raid15_maurice.pdf\">Reverse Engineering Intel Last-Level Cache Complex Addressing Using Performance Counters<\/a><\/li>\n<li><a href=\"https:\/\/arxiv.org\/pdf\/1508.03767v1.pdf\">Cracking Intel Sandy Bridge\u2019s Cache Hash Function<\/a><\/li>\n<li><a href=\"http:\/\/web.archive.org\/web\/20220312140124\/https:\/\/eprint.iacr.org\/2015\/905.pdf\">Mapping the Intel Last-Level Cache<\/a><\/li>\n<\/ul><\/div>","protected":false},"excerpt":{"rendered":"<p>\u4ece\u4e0a\u7bc7\u6587\u7ae0\u4e2d\u6211\u4eec\u5f97\u77e5Cache\u5728\u517c\u987e\u6027\u80fd\u53ca\u6210\u672c\u540e\u90fd\u662f\u8bbe\u8ba1\u6210\u7ec4\u76f8\u8054\u65b9\u5f0f\u7684\uff0c\u4ee5Intel Pentinum G55 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[9],"tags":[626,622,628,630],"views":2653,"_links":{"self":[{"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/posts\/1693"}],"collection":[{"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1693"}],"version-history":[{"count":1,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/posts\/1693\/revisions"}],"predecessor-version":[{"id":1694,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/posts\/1693\/revisions\/1694"}],"wp:attachment":[{"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1693"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1693"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1693"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}