\u5e73\u884c\u8655\u7406
\u7a0b\u5f0f\u5c64\u5f0f\u7684\u5e73\u884c:\u5141\u8a31\u591a\u500b\u7a0b\u5f0f\u540c\u6642\u57f7\u884c,\u4f7f\u7528time sharing(\u5206\u6642)\u4f5c\u696d\u5373\u53ef
\u526f\u7a0b\u5f0f\u5c64\u5f0f\u7684\u5e73\u884c:\u5141\u8a31\u540c\u4e00\u500b\u7a0b\u5f0f\u7684\u526f\u7a0b\u5f0f\u540c\u6642\u57f7\u884c,\u4f7f\u7528 multitasking(\u591a\u5de5)\u4f5c\u696d\u5373\u53ef
instruction-level parallelism(\u6307\u4ee4\u5c64\u5f0f\u7684\u5e73\u884c):\u5141\u8a31\u540c\u4e00\u500b\u7a0b\u5f0f\u4e2d\u591a\u500b\u6307\u4ee4\u540c\u6642\u57f7\u884c,\u9700\u786c\u9ad4\u652f\u63f4 ex:superscalar machine<\/p>\n\n\n\n
\u5e73\u884c\u8655\u7406\u96fb\u8166\u53ef\u89e3\u6c7a
1\u4e3b\u8a18\u61b6\u9ad4\u554f\u984c
2\u532f\u6d41\u6392\u7d50\u69cb\u554f\u984c,\u4e5f\u7a31\u8303\u8afe\u66fc\u74f6\u9838,\u53ef\u5206\u70ba:
physical bottleneck(\u5be6\u969b\u7684\u74f6\u9838):\u6574\u9ad4\u6548\u80fd\u53d7\u9650\u65bc\u532f\u6d41\u6392\u7d50\u69cb\u7684\u983b\u5bec
\u53ef\u85c9\u7531\u9023\u63a5\u7db2\u8def\u53d6\u4ee3\u532f\u6d41\u6392\u7d50\u69cb\u89e3\u6c7a
logical bottleneck(\u908f\u8f2f\u7684\u74f6\u9838):\u53d7\u9650\u65bc\u547d\u4ee4\u5f0f\u8a9e\u8a00
\u53ef\u85c9\u7531\u51fd\u6578\u5f0f\u8a9e\u8a00\u53d6\u4ee3\u547d\u4ee4\u5f0f\u8a9e\u8a00\u89e3\u6c7a<\/p>\n\n\n\n
………….<\/p>\n\n\n\n
parallel machine(\u5e73\u884c\u96fb\u8166) VLIW(very long instructionword machine\u8d85\u9577\u6307\u4ee4\u5b57\u7d44\u96fb\u8166)<\/strong> multiprocessor(\u591a\u8655\u7406\u5668\u96fb\u8166)<\/strong> pipelined computer(\u7ba1\u7dda\u5f0f\u96fb\u8166)<\/strong> super scalar machine(\u8d85\u7d14\u91cf\u96fb\u8166)<\/strong> data-flow machine(\u8cc7\u6599\u6d41\u7a0b\u96fb\u8166)<\/strong> vector computer(\u5411\u91cf\u96fb\u8166) …………….<\/p>\n\n\n\n SMP(symmetric multiprocessing,\u5c0d\u7a31\u5f0f\u591a\u91cd\u8655\u7406\u5668) clusters(\u53e2\u96c6) NUMA(nonuniform memory access,\u4e0d\u5747\u52fb\u8a18\u61b6\u9ad4\u5b58\u53d6) …………………………..<\/p>\n\n\n\n static interconnection network\u53ef\u5206\u70ba cell- based switch\u7684\u591a\u968e\u52d5\u614b\u9023\u63a5\u7db2\u8def ………………………………..<\/p>\n\n\n\n multi-processor\u7cfb\u7d71\u4f7f\u7528cache\u662f\u6548\u80fd\u7684\u95dc\u9375 \u4fdd\u6301cache\u5167\u5bb9\u4e00\u81f4\u65b9\u5f0f\u6709 cache consistency protocol(\u5feb\u53d6\u8a18\u61b6\u9ad4\u4e00\u81f4\u6027\u5354\u5b9a) …………………………..<\/p>\n\n\n\n \u7ba1\u7dda\u4f5c\u696d\u7684\u6d41\u7a0b\u63a7\u5236 \u9810\u7559\u8868:\u8868\u793a\u5de5\u4f5c\u5728\u7ba1\u7dda\u4e2d\u7684\u57f7\u884c\u6d41\u7a0b \u5e73\u884c\u8655\u7406\u7a0b\u5f0f\u5c64\u5f0f\u7684\u5e73\u884c:\u5141\u8a31\u591a\u500b\u7a0b\u5f0f\u540c\u6642\u57f7\u884c,\u4f7f\u7528time …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[23],"tags":[],"class_list":["post-728","post","type-post","status-publish","format-standard","hentry","category-computerarchitecture"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/728","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/comments?post=728"}],"version-history":[{"count":0,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/728\/revisions"}],"wp:attachment":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/media?parent=728"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/categories?post=728"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/tags?post=728"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\u5e38\u898b\u7684\u6709\uff1a
array processor(\u9663\u5217\u8655\u7406\u5668\u96fb\u8166)<\/strong>
\u5e73\u884c\u96fb\u8166\u4e2d\u6700\u9069\u5408\u8655\u7406\u5411\u91cf\u8cc7\u6599\u7684\u96fb\u8166\u67b6\u69cb
\u5c6c\u65bcSIMD\u67b6\u69cb\uff0c\u5c08\u9580\u8655\u7406vector data(\u5411\u91cf\u8cc7\u6599)
\u5e73\u884c\u8655\u7406\u6280\u5de7\uff1a<\/p>\n\n\n\n
\u5c6c\u65bcMISD\u67b6\u69cb\uff0c\u5c07\u6578\u500b\u5141\u8a31\u540c\u6642\u57f7\u884c\u7684\u904b\u7b97\u5305\u88dd\u6210\u4e00\u500b\u5f88\u9577\u7684\u6307\u4ee4\uff0c\u4e00\u500b\u6307\u4ee4\u7684\u529f\u80fd\u76f8\u7576\u65bc\u5faa\u5e8f\u96fb\u8166\u7684\u591a\u500b\u6307\u4ee4\uff0c\u56e0\u6b64\u53ef\u6e1b\u5c11\u6307\u4ee4\u5b58\u53d6\u7684\u6b21\u6578
\u9700\u8981power\u591a\uff0c\u56e0\u70ba\u6709\u591a\u500b\u7368\u7acb\u7684\u96fb\u8def\u9700\u8981\u540c\u6642\u57f7\u884c
\u5e73\u884c\u8655\u7406\u6280\u5de7\uff1a\u5c07CPI\u964d\u4f4e\u5230\u5c0f\u65bc\u4e00\uff0c\u63d0\u6607\u8a08\u7b97\u901f\u5ea6<\/p>\n\n\n\n
\u5c6c\u65bcMIMD\u67b6\u69cb\uff0c\u4f7f\u7528\u591a\u500b\u8655\u7406\u5668\u540c\u6642\u57f7\u884c
\u5e73\u884c\u96fb\u8166\u4e2d\u6700\u5177\u64f4\u5145\u6027\u7684\u96fb\u8166\u67b6\u69cb
\u53ef\u5206\u70ba
multi- processor(\u591a\u8655\u7406\u5668\u7cfb\u7d71):\u4e5f\u7a31tightly coupled system(\u7dca\u5bc6\u7d50\u5408\u7cfb\u7d71)
\u591a\u500bcpu,memory,i\/o\u4e92\u76f8\u9023\u63a5
ex:SMP,NUMA
multi-computer(\u591a\u96fb\u8166\u7cfb\u7d71):\u4e5f\u7a31loosely coupled system(\u9b06\u6563\u7d50\u5408\u7cfb\u7d71)
\u591a\u500b\u76f8\u4e92\u7368\u7acb\u7684 cpu,memory,i\/o\u900f\u904e\u7db2\u8def\u4e92\u9023
ex:cluster<\/p>\n\n\n\n
\u5e73\u884c\u96fb\u8166\u4e2d\u6700\u5177\u6210\u672c\u6548\u76ca\u7684\u96fb\u8166\u67b6\u69cb
\u9700\u8981\u7684power\u5c11\uff0c\u56e0\u70ba\u53ea\u9700\u8981\u4e00\u500b\u5171\u7528\u8a08\u6642\u5668\u4f86\u9a45\u52d5\u6240\u6709\u786c\u9ad4\u968e\u6bb5\u7684\u540c\u6b65\u57f7\u884c
\u5e73\u884c\u8655\u7406\u6280\u5de7\uff1a\u5c07CPI\u964d\u4f4e\u5230\u70ba1\uff0c\u63d0\u6607\u8a08\u7b97\u901f\u5ea6
\u512a\u9ede:\u6210\u672c\u4f4e\uff0c\u56e0\u70ba\u5c0d\u786c\u9ad4\u96fb\u8def\u6240\u9700\u8981\u7684\u6539\u8b8a\u4e0d\u5927\uff0c\u6700\u7b26\u5408\u6210\u672c\u6548\u7387
\u7f3a\u9ede:\u548c\u7ba1\u7dda\u4f5c\u696d\u4e00\u6a23
ps:pipeline\u662f\u6307\u7ba1\u7dda\u4f5c\u696d\uff0c\u5c31\u662f\u5c07\u5de5\u4f5c\u5207\u5272\u4e26\u53ef\u540c\u6642\u57f7\u884c\u591a\u500b\u5b50\u5de5\u4f5c
ps:superpipeline\u662f\u6307\u5c07\u5de5\u4f5c\u5207\u5272\u7684\u66f4\u7d30\u589e\u52a0\u7ba1\u7dda\u6df1\u5ea6\u4e26\u63d0\u9ad8\u7ba1\u7dda\u9031\u671f\u983b\u7387\uff0c\u4e26\u5c0d\u6240\u6709\u55ae\u5143\u76e1\u53ef\u80fd\u63a1\u7528pipleline\uff0c\u4e5f\u5c31\u662f\u7279\u5225\u52a0\u5f37\u7684pipeline<\/p>\n\n\n\n
\u5141\u8a31\u4e00\u500b\u8a08\u6642\u9031\u671f\u4fe1\u865f\u540c\u6642\u555f\u52d5\u591a\u500b\u6307\u4ee4\u7684\u57f7\u884c,\u63d0\u4f9binstruction-level parallelism
\u9700\u8981power\u591a\uff0c\u56e0\u70ba\u6709\u591a\u500b\u7368\u7acb\u7684\u96fb\u8def\u9700\u8981\u540c\u6642\u57f7\u884c
\u5e73\u884c\u8655\u7406\u6280\u5de7\uff1a\u5c07CPI\u964d\u4f4e\u5230\u5c0f\u65bc\u4e00\uff0c\u63d0\u6607\u8a08\u7b97\u901f\u5ea6
\u9650\u5236\u6709:
\u7a0b\u5f0f\u5e73\u884c\u5316\u7684\u9650\u5236:\u9700\u5148\u9032\u884c\u6307\u4ee4\u9593\u95dc\u4fc2\u5206\u6790,\u53ea\u6709\u7368\u7acb\u7684\u6307\u4ee4\u624d\u53ef\u540c\u6642\u57f7\u884c
\u786c\u9ad4\u8cc7\u6e90\u9650\u5236:\u4e00\u6b21\u53ef\u540c\u6642\u57f7\u884c\u6307\u4ee4\u7684\u500b\u6578,\u9808\u8003\u616e\u786c\u9ad4\u662f\u5426\u80fd\u652f\u63f4
ps:\u50b3\u7d71\u96fb\u8166\u50c5\u80fd\u4e00\u500b\u8a08\u6642\u9031\u671f\u4fe1\u865f\u555f\u52d5\u4e00\u500b\u6307\u4ee4\u7684\u57f7\u884c<\/p>\n\n\n\n
\u5e73\u884c\u96fb\u8166\u4e2d\u5177\u6700\u4f73\u8655\u7406\u6548\u679c\u7684\u67b6\u69cb
\u63a1data driven\u7684\u57f7\u884c\u65b9\u5f0f
ps:control flow machin(\u63a7\u5236\u6d41\u7a0b\u96fb\u8166)\u5c6c\u5faa\u5e8f\u7684\u57f7\u884c\u65b9\u5f0f<\/p>\n\n\n\n
\u4e5f\u7a31numeric supercomputer(\u6578\u503c\u8d85\u7d1a\u96fb\u8166)
\u5e73\u884c\u96fb\u8166\u4e2d\u6700\u8ffd\u6c42\u6548\u80fd\u7684\u67b6\u69cb
\u4f7f\u7528\u7ba1\u7dda\u5f0f\u96fb\u8166,\u9663\u5217\u8655\u7406\u5668\u96fb\u8166,\u591a\u8655\u7406\u5668\u96fb\u8166\u7684\u6280\u8853<\/p>\n\n\n\n
\u4e00\u90e8\u96fb\u8166\u5167\u81f3\u5c11\u5177\u67092\u500b\u80fd\u529b\u76f8\u8fd1\u7684\u8655\u7406\u5668
\u4f7f\u7528\u5171\u7528\u76f8\u540c\u7684\u4e3b\u8a18\u61b6\u9ad4\u548cI\/O\u88dd\u7f6e
\u4f7f\u7528\u7684\u6280\u8853\u5305\u62ec:time-shared bus(\u5206\u6642\u532f\u6d41\u6392),multiport memory(\u591a\u57e0\u8a18\u61b6\u9ad4)
SMP\u4f5c\u696d\u7cfb\u7d71\u8a2d\u8a08\u9700\u8003\u91cf\u7684\u6709:
concurrent process(\u540c\u6642\u767c\u751f\u7684\u7a0b\u5e8f)
scheduling(\u6392\u7a0b)
synchronization(\u540c\u6b65)
memory management(\u8a18\u61b6\u9ad4\u7ba1\u7406)
reliability and fault tolerance(\u53ef\u9760\u5ea6\u53ca\u5bb9\u932f)<\/p>\n\n\n\n
\u5c07\u4e00\u7d44\u4e92\u9023\u7684\u96fb\u8166(\u7bc0\u9ede)\u5982\u540c\u55ae\u4e00\u7684\u8a08\u7b97\u8cc7\u6e90\u4e00\u822c\u5730\u904b\u7b97
\u512a\u9ede\u5305\u62ec:
absolute scalability(\u7d55\u5c0d\u898f\u6a21)
incremental scalability(\u905e\u589e\u5c3a\u5ea6)
high availability(\u9ad8\u53ef\u7528\u5ea6)
superior price\/performance(\u826f\u597d\u7684\u6210\u672c\/\u6548\u80fd)
\u4f7f\u7528\u7684\u6280\u8853\u5305\u62ec:
failure management(\u5931\u6548\u7ba1\u7406)
load balancing(\u8ca0\u8f09\u5e73\u8861)
parallelizing computation(\u5e73\u884c\u8a08\u7b97)<\/p>\n\n\n\n
\u5728\u55ae\u4e00\u7cfb\u7d71\u4e0a\u53ef\u652f\u63f4\u66f4\u591a\u8655\u7406\u5668
ps:\u4e00\u822cSMP\u9650\u5236\u8655\u7406\u5668\u7d04\u70ba16-64\u500b
ps:SMP\u5c6c\u65bcUMA(\u5747\u52fb\u5b58\u53d6\u8a18\u61b6\u9ad4)<\/p>\n\n\n\n
\u5e73\u884c\u96fb\u8166\u7684\u9023\u63a5\u7db2\u8def\u5206\u70ba
static interconnection network(\u975c\u614b\u9023\u63a5\u7db2\u8def)<\/strong>
\u5e38\u7528\u65bc\u7121\u5171\u7528\u8a18\u61b6\u9ad4,\u4e26\u7528\u8a0a\u606f\u50b3\u905e\u7684\u591a\u96fb\u8166\u7cfb\u7d71
\u6240\u6709\u7d44\u6210\u5143\u4ef6\u7684\u9023\u63a5\u56fa\u5b9a
dynamic interconnection network(\u55ae\u968e\u52d5\u614b\u9023\u63a5\u7db2\u8def)<\/strong>
\u5e38\u4f7f\u7528\u5171\u7528\u8a18\u61b6\u9ad4,\u4e0d\u9069\u7528\u65bc\u7d44\u6210\u5143\u4ef6\u500b\u6578\u592a\u591a\u7684\u591acpu\u7cfb\u7d71
\u6240\u6709\u7d44\u6210\u5143\u4ef6\u7684\u9023\u63a5\u4f7f\u7528switch(\u4ea4\u63db\u958b\u95dc)
\u591a\u968e\u52d5\u614b\u9023\u63a5\u7db2\u8def<\/strong>
switch(\u4ea4\u63db\u95dc\u95dc)\u8f03\u5c11,\u4e26\u5206\u70ba\u4ee5\u4e0b\u5169\u7a2e
cross-bar switch-based switch(\u4ea4\u53c9\u9ede\u578b\u4ea4\u63db\u95dc\u95dc)
cell-based switch(\u7d30\u80de\u578b\u4ea4\u63db\u958b\u95dc)<\/p>\n\n\n\n
exhaustive or completely connected network(\u5b8c\u6574\u9023\u63a5\u7db2\u8def)<\/strong>
\u5404CPU\u8207\u6240\u6709CPU\u9023\u7d50
\u4e00\u7dad\u9663\u5217\u7db2\u8def<\/strong>
\u8207\u6700\u76f8\u9130\u76842\u500bCPU\u9023\u7d50
\u9069\u7528\u65bc\u7ba1\u7dda\u4f5c\u696d\u7684\u8655\u7406\u5668\u7ba1\u7dda
2-d mesh network(\u4e8c\u7dad\u9663\u5217\u7db2\u8def)<\/strong>,\u4e5f\u7a31nearest neighbor mesh(\u9130\u8fd1\u7db2\u72c0\u7d50\u69cb)
\u8207\u6700\u76f8\u9130\u76844\u500bCPU\u9023\u7d50
\u5bb9\u6613\u4f48\u7dda\u8207\u64f4\u5145,\u7279\u5225\u9069\u7528\u65bc\u8d85\u5927\u578b\u7a4d\u9ad4\u96fb\u8def\u7684\u88fd\u4f5c
ex:\u9663\u5217\u8655\u7406\u5668\u96fb\u8166ILLIAC IV
systolic array(\u5fc3\u85cf\u58d3\u7e2e\u5f0f\u9663\u5217)<\/strong>
\u8207\u6700\u76f8\u9130\u76846\u500bCPU\u9023\u7d50
x\u9023\u63a5\u7db2\u8def<\/strong>
\u8207\u6700\u76f8\u9130\u76848\u500bCPU\u9023\u7d50
cube network(\u7acb\u65b9\u9ad4\u9023\u63a5\u7db2\u8def)<\/strong>
3\u7dad\u7a7a\u9593\u7684\u9023\u63a5\u7db2\u8def,\u5404cpu\u67093\u4f4d\u5143\u7684\u5ea7\u6a19,\u53ef\u9023\u63a58\u500bcpu
hypercube network(\u8d85\u7acb\u65b9\u9ad4\u7db2\u8def)<\/strong>
N\u7dad\u7a7a\u9593\u7684\u9023\u63a5\u7db2\u8def,\u53ef\u9023\u63a52^N\u500bcpu,\u4e14\u6703\u6709N*2^(N-1)\u689d\u93c8\u7d50\u76f8\u9023<\/p>\n\n\n\n
dynamic interconnection network\u53ef\u5206\u70ba
single bus(\u55ae\u4e00\u532f\u6d41\u6392)<\/strong>
\u6709\u4e00\u5b9a\u983b\u5bec,\u4e0d\u9069\u5408\u5927\u91cfcpu\u7684\u7cfb\u7d71
system and local bus(\u7cfb\u7d71\u532f\u6d41\u6392,\u5340\u57df\u532f\u6d41\u6392)<\/strong>
\u9069\u7528\u65bc\u55ae\u4e00\u5faecpu\u7684\u7cfb\u7d71\u64f4\u5145\u70ba\u591a\u500b\u5faecpu\u7684\u7cfb\u7d71
\u4e0d\u9069\u5408\u5927\u91cf\u8655\u7406\u5668\u7684\u7cfb\u7d71
cross-bar switch(\u4ea4\u53c9\u9ede\u4ea4\u63db\u7db2\u8def)<\/strong>
\u6bcf\u500b\u8a18\u61b6\u9ad4\u6a21\u7d44\u6709\u4e00\u689d\u5c08\u7528\u7684\u532f\u6d41\u6392\u8207\u5176\u5b83\u7684\u7d44\u6210\u5143\u4ef6\u9023\u63a5
\u4e0d\u9069\u7528\u65bc\u7d44\u6210\u5143\u4ef6\u500b\u6578\u8f03\u591a\u7684\u591acpu\u7cfb\u7d71
multiport memory(\u591a\u9023\u63a5\u57e0\u8a18\u61b6\u9ad4)<\/strong>
\u5404\u8a18\u61b6\u9ad4\u6a21\u7d44\u6709\u591a\u9023\u63a5\u57e0,\u53ef\u8207\u591a\u500b\u7d44\u6210\u5143\u4ef6\u9023\u63a5
\u88fd\u4f5c\u6210\u672c\u592a\u9ad8<\/p>\n\n\n\n
\u4f7f\u7528 destination-tag(\u76ee\u7684\u5730\u6a19\u7c64)\u7684\u8def\u5f91\u9078\u64c7\u6f14\u7b97\u6cd5
\u53ef\u5206\u70ba
baseline network(\u5e95\u7dda\u9023\u63a5\u7db2\u8def)<\/strong>
\u9023\u63a52^n\u500b\u8f38\u5165\u8207\u8f38\u51fa,\u9700n\u500b\u968e\u6bb5,\u5404\u968e\u6bb5\u8981\u75282^(n-1)\u500bswitch
2\u9032\u5236\u7684\u9023\u63a5\u7db2\u8def
omega network(\u5967\u7c73\u8304\u9023\u63a5\u7db2\u8def)<\/strong>
\u9023\u63a52^n\u500b\u8f38\u5165\u8207\u8f38\u51fa,\u9700n\u500b\u968e\u6bb5,\u5404\u968e\u6bb5\u8981\u75282^(n-1)\u500bswitch
2\u9032\u5236\u7684\u9023\u63a5\u7db2\u8def
\u4f7f\u7528perfect shuffle(\u5b8c\u7f8e\u6d17\u724c)\u7684\u93c8\u7d50\u5b89\u6392\u65b9\u5f0f
delta network(\u4e09\u89d2\u6d32\u9023\u63a5\u7db2\u8def)<\/strong>
\u9023\u63a5x^n\u500b\u8f38\u5165\u8207\u8f38\u51fa,\u9700n\u500b\u968e\u6bb5,\u5404\u968e\u6bb5\u8981\u7528x^(n-1)\u500bswitch
x\u9032\u5236\u7684\u9023\u63a5\u7db2\u8def
\u4f7f\u7528perfect shuffle(\u5b8c\u7f8e\u6d17\u724c)\u7684\u93c8\u7d50\u5b89\u6392\u65b9\u5f0f<\/p>\n\n\n\n
\u591a\u500bcpu\u82e5\u5c0d\u5171\u7528\u8a18\u61b6\u9ad4\u9032\u884c\u5b58\u53d6,\u6703\u4f7f\u5f97\u5b58\u53d6\u885d\u7a81\u7684\u6a5f\u7387\u589e\u52a0
\u4f7f\u7528\u591a\u500b cache\u53ef\u6e1b\u5c11\u5c0d\u5171\u7528\u8a18\u61b6\u9ad4\u5b58\u53d6\u7684\u6b21\u6578,\u6e1b\u5c11\u885d\u7a81
\u540c\u4e00\u4efd\u8cc7\u6599\u5b58\u653e\u5728\u591a\u500bcache\u4e2d,\u6703\u5c0e\u81f4cache\u4e2d\u8cc7\u6599\u4e0d\u4e00\u81f4\u7684\u60c5\u5f62\u767c\u751f<\/p>\n\n\n\n
\u8edf\u9ad4\u5be6\u4f5c:
1\u5c07\u6bcf\u500b\u8cc7\u6599\u9805\u76ee\u5340\u5206\u6210\u70bashared or non-shared(\u5171\u7528\u8207\u975e\u5171\u7528)\u4ee5\u53caread-only or writeable(\u552f\u8b80\u8207\u53ef\u5beb\u5165)
2\u5c07 writeable\u7684shared\u8cc7\u6599\u9805\u76ee\u96c6\u4e2d\u5b58\u653e\u5728\u4e00\u500b\u7279\u6b8a\u5340\u57df\u4e2d\u4e26\u52a0\u4ee5\u63a7\u5236,\u5373\u53ef\u4fdd\u6301\u4e00\u81f4\u6027
\u786c\u9ad4\u5be6\u4f5c
1\u4f7f\u7528snooper(\u7aba\u8996\u5668)\u76e3\u8996\u5171\u7528\u8a18\u61b6\u9ad4\u532f\u6d41\u6392
2cache,cpu, \u5171\u7528\u8a18\u61b6\u9ad4\u4e4b\u9593\u5236\u5b9acache consistency protocol
ps:snooper\u662f\u4e00\u7a2ecache\u63a7\u5236\u5668<\/p>\n\n\n\n
\u4fdd\u6301\u8cc7\u6599\u5728\u591a\u500bcache\u4ecd\u7136\u5177\u6709\u4e00\u81f4\u6027\u7684\u5167\u5bb9,\u6709\u4ee5\u4e0b2\u7a2e:
write through protocol(\u8cab\u7a7f\u5f0f\u5beb\u5165\u7684\u5354\u5b9a)<\/strong>
\u5be6\u4f5c\u7c21\u55ae,\u6548\u679c\u53ea\u6bd4\u8edf\u9ad4\u5be6\u4f5c\u597d\u4e00\u4e9b
\u6bcf\u4e00\u6b21\u5beb\u5165\u90fd\u4f7f\u7528\u8cab\u7a7f\u5f0f\u5beb\u5165,snooper\u6703\u76e3\u63a7\u6bcf\u6b21\u5beb\u5165\u7684\u6d3b\u52d5
write once protocol(\u50c5\u5beb\u4e00\u6b21\u7684\u5354\u5b9a)<\/strong>
\u5be6\u4f5c\u8907\u96dc,\u6548\u679c\u8f03\u597d
\u7b2c\u4e00\u6b21\u5beb\u5165\u4f7f\u7528\u8cab\u7a7f\u5f0f\u5beb\u5165,\u4e4b\u5f8c\u7684\u5beb\u5165\u5728snooper cache\u4e2d\u9032\u884c
\u6709\u4ee5\u4e0b\u56db\u7a2e\u72c0\u614b
invalid(\u7121\u6548\u7684\u72c0\u614b)
clean(\u4e7e\u6de8\u7684\u72c0\u614b)
reserved(\u4fdd\u5b58\u7684\u72c0\u614b)
dirty(\u9aaf\u9ad2\u7684\u72c0\u614b)<\/p>\n\n\n\n
\u70ba\u9632\u6b62\u4e0d\u540c\u5de5\u4f5c\u5728\u7ba1\u7dda\u5167\u90e8\u767c\u751f\u885d\u7a81,\u4e26\u6c7a\u5b9a\u65b0\u5de5\u4f5c\u9032\u5165\u7ba1\u7dda\u800c\u4e0d\u6703\u5f15\u8d77\u885d\u7a81\u7684\u6642\u9593<\/p>\n\n\n\n
\u885d\u7a81\u5411\u91cf
\u72c0\u614b\u8f49\u79fb\u5716:\u53ef\u8868\u793a\u7ba1\u7dda\u5167\u90e8\u6240\u6709\u53ef\u80fd\u7684\u72c0\u614b
\u8caa\u5a6a\u8ff4\u8def
\u6700\u5c0f\u5e73\u5747\u5ef6\u9072<\/p>\n","protected":false},"excerpt":{"rendered":"