{"id":147,"date":"2024-12-04T14:35:42","date_gmt":"2024-12-04T14:35:42","guid":{"rendered":"https:\/\/www.isvmspace.com\/?p=147"},"modified":"2024-12-04T14:35:42","modified_gmt":"2024-12-04T14:35:42","slug":"%e7%bc%93%e5%ad%98%e4%b8%80%e8%87%b4%e6%80%a7%e5%8d%8f%e8%ae%aemesi","status":"publish","type":"post","link":"https:\/\/www.isvmspace.com\/?p=147","title":{"rendered":"\u7f13\u5b58\u4e00\u81f4\u6027\u534f\u8bae(MESI)"},"content":{"rendered":"

CPU\u591a\u6838\u7f13\u5b58\u67b6\u6784<\/h1>\n

\"CPU\"<\/p>\n

\u7f13\u5b58\u4e00\u81f4\u6027\u534f\u8bae\uff08MESI\uff09<\/h1>\n

M \u4fee\u6539\uff08Modified\uff09<\/h2>\n

\u8be5\u7f13\u5b58\u884c\u53ea\u88ab\u7f13\u5b58\u5728\u8be5CPU\u7684\u7f13\u5b58\u4e2d\uff0c\u5e76\u4e14\u662f\u88ab\u4fee\u6539\u8fc7\u7684\uff0c\u5373\u4e0e\u4e3b\u5b58\u4e2d\u7684\u6570\u636e\u4e0d\u4e00\u81f4\uff0c\u8be5\u7f13\u5b58\u884c\u4e2d\u7684\u5185\u5b58\u9700\u8981\u5728\u672a\u6765\u7684\u67d0\u4e2a\u65f6\u95f4\u70b9\uff08\u5141\u8bb8\u5176\u5b83CPU\u8bfb\u53d6\u8bf7\u4e3b\u5b58\u4e2d\u76f8\u5e94\u5185\u5b58\u4e4b\u524d\uff09\u5199\u56de\u4e3b\u5b58<\/p>\n

E \u72ec\u4eab\uff08Exclusive\uff09<\/h2>\n

\u8be5\u7f13\u5b58\u884c\u53ea\u88ab\u7f13\u5b58\u5728\u8be5CPU\u7684\u7f13\u5b58\u4e2d\uff0c\u5b83\u662f\u672a\u88ab\u4fee\u6539\u8fc7\u7684\uff0c\u4e0e\u4e3b\u5b58\u4e2d\u6570\u636e\u4e00\u81f4\u3002\u8be5\u72b6\u6001\u53ef\u4ee5\u5728\u4efb\u4f55\u65f6\u523b\u5f53\u6709\u5176\u5b83CPU\u8bfb\u53d6\u8be5\u5185\u5b58\u65f6\u53d8\u6210\u5171\u4eab\u72b6\u6001\uff08shared)<\/p>\n

S \u5171\u4eab\uff08Shared\uff09<\/h2>\n

\u8be5\u72b6\u6001\u610f\u5473\u7740\u8be5\u7f13\u5b58\u884c\u53ef\u80fd\u88ab\u591a\u4e2aCPU\u7f13\u5b58\uff0c\u5e76\u4e14\u5404\u4e2a\u7f13\u5b58\u4e2d\u7684\u6570\u636e\u4e0e\u4e3b\u5b58\u6570\u636e\u4e00\u81f4\uff0c\u5f53\u6709\u4e00\u4e2aCPU\u4fee\u6539\u8be5\u7f13\u5b58\u884c\u4e2d\uff0c\u5176\u5b83CPU\u4e2d\u8be5\u7f13\u5b58\u884c\u53ef\u4ee5\u88ab\u4f5c\u5e9f\uff08\u53d8\u6210Invalid\uff09<\/p>\n

I \u65e0\u6548\uff08Invalid\uff09<\/h2>\n

\u8be5\u7f13\u5b58\u662f\u65e0\u6548\u7684\uff08\u53ef\u80fd\u6709\u5176\u5b83CPU\u4fee\u6539\u4e86\u8be5\u7f13\u5b58\u884c\uff09<\/p>\n

\u5de5\u4f5c\u539f\u7406<\/h2>\n

\u7a0b\u5e8f\u4e2d\u53d8\u91cf int count = 0; count ++;
\n1. \u5047\u8bbeCPU1\u7387\u5148\u62a2\u5230\u65f6\u95f4\u7247\uff0c\u5f53\u53d8\u91cfcount\u52a0\u8f7d\u81f3CPU\u7f13\u5b58\u4e2d\u65f6\uff0c\u4f1a\u5c06count\u7684\u4f7f\u7528\u6807\u5fd7\u4e3a\uff08E\u72ec\u5360\uff1a\u9996\u6b21\u52a0\u8f7d\u4f1a\u5c06\u53d8\u91cf\u7f6e\u4e3a\u72ec\u5360\uff0c\u4e5f\u5c31\u8bf4\u660e\u6ca1\u6709\u5176\u4ed6CPU\u8fdb\u884c\u52a0\u8f7d\uff09<\/p>\n

    \n
  1. \n

    CPU2\u4e5f\u83b7\u5f97\u65f6\u95f4\u7247\uff0c\u628a\u53d8\u91cfcount\u52a0\u8f7d\u7f13\u5b58\u4e2d\uff0c\u6b64\u65f6count\u7684\u4f7f\u7528\u6807\u5fd7\u4e3a\uff08E\u72ec\u5360\uff09\uff0c\u5e76\u53d1\u9001\u6d88\u606f\u81f3\u603b\u7ebf\uff0c\u544a\u77e5\u5176\u4ed6CPU\u8bfb\u53d6\u4e86\u53d8\u91cf\u7684\u503c\uff0c\u5404CPU\u901a\u8fc7\u65f6\u523b\u76d1\u542c\uff08\u603b\u7ebf\u55c5\u63a2\u673a\u5236\uff09\u83b7\u5f97\u5230\u6b64\u53d8\u91cf\u5df2\u88ab\u591a\u4e2aCPU\u6240\u52a0\u8f7d\uff0c\u90a3\u4e48\u6b64\u65f6CPU2\u5c31\u4f1a\u5c06\u81ea\u8eabcount\u7684\u4f7f\u7528\u6807\u5fd7\u7f6e\u4e3a\uff08S\u5171\u4eab\uff09\uff0cCPU1\u4e5f\u4f1a\u5c06\u53d8\u91cf\u7684\u4f7f\u7528\u6807\u5fd7\u4e5f\u4f1a\u7f6e\u4e3a\uff08S\uff09<\/p>\n<\/li>\n

  2. \n

    CPU1\u4ece\u7f13\u5b58\u4e2d\u52a0\u8f7dcount\u81f3\u5bc4\u5b58\u5668\u4e2d\u8fdb\u884c\u81ea\u589e\u64cd\u4f5c\uff0c\u6267\u884c\u5b8c\u6bd5\u4e4b\u540e\uff0ccount = 0 -> 1\uff0c\u6b64\u65f6\u7531\u4e8ecount\u7684\u503c\u53d1\u751f\u4e86\u53d8\u5316\uff0c\u56e0\u6b64CPU1\u4e2d\u53d8\u91cfcount\u4f7f\u7528\u6807\u5fd7\u5e94\u4e3a\uff08M\u4fee\u6539\uff09\uff0c\u6b64\u65f6CPU1\u4f1a\u53d1\u9001\u6d88\u606f\u81f3\u603b\u7ebf\uff0c\u544a\u77e5\u5176\u4ed6\u7ebf\u7a0b\u5df2\u7ecf\u4fee\u6539\u4e86\u53d8\u91cfcount \u7684\u503c\uff0c\u5176\u4ed6CPU\u55c5\u63a2\u5230\u503c\u7684\u4fee\u6539\uff0c\u5c31\u4f1a\u5c06\u81ea\u8eab\u53d8\u91cfcount\u7684\u4f7f\u7528\u6807\u5fd7\u7f6e\u4e3a\uff08I\u65e0\u6548\uff09<\/p>\n<\/li>\n

  3. \n

    CPU1\u4f1a\u5c06M\u72b6\u6001\u7684\u53d8\u91cf\u7acb\u523b\u5199\u56de\u81f3\u4e3b\u5185\u5b58\u4e2d\uff0c\u5199\u56de\u5b8c\u6bd5\u4e4b\u540e\uff0cCPU1\u4f1a\u5c06\u4f7f\u7528\u72b6\u6001\u7f6e\u4e3a\uff08E\u72ec\u4eab\uff09\uff0c\u53d1\u9001\u6d88\u606f\u81f3\u603b\u7ebf\uff0c\u544a\u77e5\u5176\u4ed6CPU\u5df2\u7ecf\u5199\u56de\u5b8c\u6bd5\uff0c\u5176\u4ed6CPU\u4f1a\u518d\u6b64\u4ece\u4e3b\u5185\u5b58\u4e2d\u8bfb\u53d6\u53d8\u91cfcount\u7684\u503c\uff0c\u8bfb\u53d6\u5b8c\u6bd5\u4e4b\u540e\uff0c\u4e5f\u4f1a\u53d1\u9001\u6d88\u606f\u81f3\u603b\u7ebf\uff0c\u5176\u4ed6CPU\u55c5\u63a2\u5230\u4e4b\u540e\u5c06\u81ea\u8eab\u53d8\u91cfcount\u7f6e\u4e3a\uff08S\u5171\u4eab\uff09\uff0c\u81ea\u8eab\u53d8\u91cf\u7684\u4f7f\u7528\u72b6\u6001\u4e5f\u4f1a\u7f6e\u4e3a\uff08S\u5171\u4eab\uff09<\/p>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    CPU\u591a\u6838\u7f13\u5b58\u67b6\u6784 \u7f13\u5b58\u4e00\u81f4\u6027\u534f\u8bae\uff08MESI\uff09 M \u4fee\u6539\uff08Modified\uff09 \u8be5\u7f13\u5b58\u884c\u53ea\u88ab\u7f13\u5b58\u5728\u8be5CPU\u7684\u7f13\u5b58 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=\/wp\/v2\/posts\/147"}],"collection":[{"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=147"}],"version-history":[{"count":2,"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=\/wp\/v2\/posts\/147\/revisions"}],"predecessor-version":[{"id":196,"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=\/wp\/v2\/posts\/147\/revisions\/196"}],"wp:attachment":[{"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=147"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=147"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.isvmspace.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=147"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}