{"id":45118,"date":"2023-10-03T22:28:11","date_gmt":"2023-10-03T14:28:11","guid":{"rendered":"\/\/www.dealsbon.com\/?p=45118"},"modified":"2023-10-03T22:28:11","modified_gmt":"2023-10-03T14:28:11","slug":"dckfswczd","status":"publish","type":"post","link":"\/\/www.dealsbon.com\/blog\/45118.html","title":{"rendered":"DMA\u4e32\u53e3\u53d1\u9001\u5b8c\u6210\u4e2d\u65ad"},"content":{"rendered":"

  DMA\uff08Direct Memory Access\uff09\u4e32\u53e3\u53d1\u9001\u5b8c\u6210\u4e2d\u65ad\u662f\u4e00\u79cd\u7528\u4e8e\u63a7\u5236\u5916\u8bbe\u8bbe\u5907\u7684\u786c\u4ef6\u4e2d\u65ad\uff0c\u5b83\u53ef\u4ee5\u63d0\u4f9b\u7a0b\u5e8f\u5458\u66f4\u591a\u63a7\u5236\u6743\uff0c\u4ee5\u53ca\u66f4\u5feb\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u3002\u672c\u6587\u5c06\u5bf9DMA\u4e32\u53e3\u53d1\u9001\u5b8c\u6210\u4e2d\u65ad\u7684\u539f\u7406\u3001\u5e94\u7528\u548c\u4f18\u70b9\u8fdb\u884c\u8be6\u7ec6\u4ecb\u7ecd\u3002<\/p>\n

DMA\u4e32\u53e3\u53d1\u9001\u5b8c\u6210\u4e2d\u65ad\u539f\u7406<\/h2>\n

  DMA\u4e32\u53e3\u53d1\u9001\u5b8c\u6210\u4e2d\u65ad\u662f\u4e00\u79cd\u786c\u4ef6\u4e2d\u65ad\uff0c\u5b83\u53ef\u4ee5\u8ba9\u5916\u8bbe\u8bbe\u5907\u4e0d\u5fc5\u7b49\u5f85CPU\u7684\u54cd\u5e94\uff0c\u800c\u662f\u76f4\u63a5\u5c06\u6570\u636e\u4ece\u5185\u5b58\u4f20\u8f93\u5230\u5916\u8bbe\u8bbe\u5907\u3002DMA\u4e32\u53e3\u53d1\u9001\u5b8c\u6210\u4e2d\u65ad\u7684\u5de5\u4f5c\u539f\u7406\u662f\uff0c\u5f53CPU\u53d1\u51fa\u4e00\u4e2a\u63a7\u5236\u4fe1\u53f7\uff0cDMA\u63a7\u5236\u5668\u5c31\u4f1a\u63a5\u6536\u5230\u8fd9\u4e2a\u4fe1\u53f7\uff0c\u7136\u540e\u5c06\u6570\u636e\u4ece\u5185\u5b58\u4f20\u8f93\u5230\u5916\u8bbe\u8bbe\u5907\u3002\u5f53DMA\u63a7\u5236\u5668\u5b8c\u6210\u6570\u636e\u4f20\u8f93\u65f6\uff0c\u5b83\u4f1a\u53d1\u51fa\u4e00\u4e2a\u4e2d\u65ad\u4fe1\u53f7\uff0c\u901a\u77e5CPU\u5b8c\u6210\u6570\u636e\u4f20\u8f93\u3002<\/p>\n

DMA\u4e32\u53e3\u53d1\u9001\u5b8c\u6210\u4e2d\u65ad\u7684\u5e94\u7528<\/h2>\n

  1. \u6570\u636e\u4f20\u8f93\u52a0\u901f<\/h3>\n

  DMA\u4e32\u53e3\u53d1\u9001\u5b8c\u6210\u4e2d\u65ad\u53ef\u4ee5\u5927\u5927\u52a0\u5feb\u6570\u636e\u4f20\u8f93\u7684\u901f\u5ea6\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u8ba9\u5916\u8bbe\u8bbe\u5907\u4e0d\u5fc5\u7b49\u5f85CPU\u7684\u54cd\u5e94\uff0c\u800c\u662f\u76f4\u63a5\u5c06\u6570\u636e\u4ece\u5185\u5b58\u4f20\u8f93\u5230\u5916\u8bbe\u8bbe\u5907\u3002\u8fd9\u6837\u4e00\u6765\uff0cCPU\u5c31\u53ef\u4ee5\u8282\u7701\u66f4\u591a\u7684\u65f6\u95f4\u548c\u7cbe\u529b\u6765\u5904\u7406\u5176\u4ed6\u4efb\u52a1\u3002<\/p>\n

  2. \u66f4\u591a\u63a7\u5236\u6743<\/h3>\n

  \u4f7f\u7528DMA\u4e32\u53e3\u53d1\u9001\u5b8c\u6210\u4e2d\u65ad\uff0c\u7a0b\u5e8f\u5458\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u5916\u8bbe\u8bbe\u5907\u7684\u884c\u4e3a\uff0c\u6bd4\u5982\u53ef\u4ee5\u63a7\u5236\u5916\u8bbe\u8bbe\u5907\u7684\u8bfb\u53d6\u548c\u5199\u5165\u901f\u5ea6\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u3002<\/p>\n

DMA\u4e32\u53e3\u53d1\u9001\u5b8c\u6210\u4e2d\u65ad\u7684\u4f18\u70b9<\/h2>\n

  1. \u6613\u4e8e\u4f7f\u7528<\/h3>\n

  DMA\u4e32\u53e3\u53d1\u9001\u5b8c\u6210\u4e2d\u65ad\u662f\u4e00\u79cd\u7b80\u5355\u6613\u7528\u7684\u786c\u4ef6\u4e2d\u65ad\uff0c\u5b83\u53ef\u4ee5\u8ba9\u7a0b\u5e8f\u5458\u66f4\u5bb9\u6613\u63a7\u5236\u5916\u8bbe\u8bbe\u5907\uff0c\u53ea\u9700\u8981\u7b80\u5355\u7684\u8bbe\u7f6e\u548c\u64cd\u4f5c\uff0c\u5c31\u53ef\u4ee5\u5b9e\u73b0\u5feb\u901f\u6570\u636e\u4f20\u8f93\u3002<\/p>\n

  2. \u6570\u636e\u4f20\u8f93\u901f\u5ea6\u66f4\u5feb<\/h3>\n

  \u4f7f\u7528DMA\u4e32\u53e3\u53d1\u9001\u5b8c\u6210\u4e2d\u65ad\uff0c\u53ef\u4ee5\u63d0\u5347\u6570\u636e\u4f20\u8f93\u7684\u901f\u5ea6\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u8ba9\u5916\u8bbe\u8bbe\u5907\u4e0d\u5fc5\u7b49\u5f85CPU\u7684\u54cd\u5e94\uff0c\u800c\u662f\u76f4\u63a5\u5c06\u6570\u636e\u4ece\u5185\u5b58\u4f20\u8f93\u5230\u5916\u8bbe\u8bbe\u5907\u3002<\/p>\n

  3. \u66f4\u591a\u7684\u63a7\u5236\u6743<\/h3>\n

  DMA\u4e32\u53e3\u53d1\u9001\u5b8c\u6210\u4e2d\u65ad\u53ef\u4ee5\u8ba9\u7a0b\u5e8f\u5458\u66f4\u597d\u5730\u63a7\u5236\u5916\u8bbe\u8bbe\u5907\u7684\u884c\u4e3a\uff0c\u6bd4\u5982\u53ef\u4ee5\u63a7\u5236\u5916\u8bbe\u8bbe\u5907\u7684\u8bfb\u53d6\u548c\u5199\u5165\u901f\u5ea6\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u3002<\/p>\n

\u603b\u7ed3<\/h2>\n

  DMA\u4e32\u53e3\u53d1\u9001\u5b8c\u6210\u4e2d\u65ad\u662f\u4e00\u79cd\u7528\u4e8e\u63a7\u5236\u5916\u8bbe\u8bbe\u5907\u7684\u786c\u4ef6\u4e2d\u65ad\uff0c\u5b83\u53ef\u4ee5\u63d0\u4f9b\u7a0b\u5e8f\u5458\u66f4\u591a\u63a7\u5236\u6743\uff0c\u4ee5\u53ca\u66f4\u5feb\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u3002<\/strong>\u5b83\u53ef\u4ee5\u8ba9\u5916\u8bbe\u8bbe\u5907\u4e0d\u5fc5\u7b49\u5f85CPU\u7684\u54cd\u5e94\uff0c\u800c\u662f\u76f4\u63a5\u5c06\u6570\u636e\u4ece\u5185\u5b58\u4f20\u8f93\u5230\u5916\u8bbe\u8bbe\u5907\uff0c\u5927\u5927\u52a0\u5feb\u6570\u636e\u4f20\u8f93\u7684\u901f\u5ea6\u3002\u53e6\u5916\uff0cDMA\u4e32\u53e3\u53d1\u9001\u5b8c\u6210\u4e2d\u65ad\u8fd8\u53ef\u4ee5\u8ba9\u7a0b\u5e8f\u5458\u66f4\u597d\u5730\u63a7\u5236\u5916\u8bbe\u8bbe\u5907\u7684\u884c\u4e3a\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

DMA\uff08DirectMemoryAccess\uff09\u4e32\u53e3\u53d1\u9001\u5b8c\u6210\u4e2d\u65ad\u662f\u4e00\u79cd\u7528\u4e8e\u63a7\u5236\u5916\u8bbe\u8bbe\u5907\u7684\u786c\u4ef6\u4e2d\u65ad\uff0c\u5b83\u53ef\u4ee5\u63d0\u4f9b\u7a0b\u5e8f\u5458\u66f4\u591a\u63a7\u5236\u6743\uff0c\u4ee5\u53ca\u66f4\u5feb\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u3002\u672c\u6587\u5c06\u5bf9DMA\u4e32\u53e3<\/p>\n","protected":false},"author":1,"featured_media":4132,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"categories":[36],"tags":[69],"class_list":["post-45118","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-cktx"],"_links":{"self":[{"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/posts\/45118"}],"collection":[{"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/comments?post=45118"}],"version-history":[{"count":0,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/posts\/45118\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/media\/4132"}],"wp:attachment":[{"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/media?parent=45118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/categories?post=45118"},{"taxonomy":"post_tag","embeddable":true,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/tags?post=45118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}