{"id":62631,"date":"2023-11-04T00:43:29","date_gmt":"2023-11-03T16:43:29","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=62631"},"modified":"2023-11-04T00:43:29","modified_gmt":"2023-11-03T16:43:29","slug":"dckfstgsjcsltgxn","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/62631.html","title":{"rendered":"DMA\u4e32\u53e3\u53d1\u9001\uff1a\u901a\u8fc7\u6570\u636e\u4f20\u8f93\u6765\u63d0\u9ad8\u6027\u80fd"},"content":{"rendered":"
DMA\u4e32\u53e3\u53d1\u9001\uff08Direct Memory Access\uff09\u662f\u4e00\u79cd\u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6027\u80fd\u7684\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u5c06\u6570\u636e\u4ece\u5185\u5b58\u4e2d\u76f4\u63a5\u590d\u5236\u5230\u5916\u8bbe\uff0c\u4ece\u800c\u6781\u5927\u5730\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u901f\u5ea6\uff0c\u4ece\u800c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecdDMA\u4e32\u53e3\u53d1\u9001\u7684\u539f\u7406\u3001\u4f18\u70b9\u548c\u5e94\u7528\uff0c\u4ee5\u671f\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u8fd9\u9879\u6280\u672f\u3002<\/p>\n
DMA\u4e32\u53e3\u53d1\u9001\u7684\u57fa\u672c\u539f\u7406\u662f\uff0c\u5728\u4f20\u8f93\u6570\u636e\u4e4b\u524d\uff0c\u5c06\u6570\u636e\u4ece\u5185\u5b58\u4e2d\u590d\u5236\u5230\u4e00\u4e2a\u7f13\u51b2\u533a\u4e2d\uff0c\u7136\u540e\u4f7f\u7528DMA\u6280\u672f\u5c06\u7f13\u51b2\u533a\u4e2d\u7684\u6570\u636e\u76f4\u63a5\u4f20\u8f93\u5230\u5916\u8bbe\uff0c\u800c\u4e0d\u9700\u8981CPU\u53c2\u4e0e\u3002\u4e0e\u4f20\u7edf\u7684\u4e32\u53e3\u53d1\u9001\u65b9\u5f0f\u76f8\u6bd4\uff0cDMA\u4e32\u53e3\u53d1\u9001\u53ef\u4ee5\u6781\u5927\u5730\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u901f\u5ea6\uff0c\u4ece\u800c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\u3002<\/p>\n
DMA\u4e32\u53e3\u53d1\u9001\u7684\u4f18\u70b9\u975e\u5e38\u660e\u663e\uff1a\u9996\u5148\uff0c\u5b83\u53ef\u4ee5\u6781\u5927\u5730\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u901f\u5ea6\uff0c\u4ece\u800c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\uff1b\u5176\u6b21\uff0c\u5b83\u53ef\u4ee5\u6709\u6548\u51cf\u5c11CPU\u7684\u5de5\u4f5c\u91cf\uff0c\u4ece\u800c\u51cf\u5c11\u7cfb\u7edf\u7684\u529f\u8017\uff1b\u6b64\u5916\uff0c\u5b83\u8fd8\u53ef\u4ee5\u63d0\u9ad8\u7cfb\u7edf\u7684\u7a33\u5b9a\u6027\uff0c\u56e0\u4e3a\u6570\u636e\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u4e0d\u9700\u8981CPU\u53c2\u4e0e\u3002<\/p>\n
DMA\u4e32\u53e3\u53d1\u9001\u6280\u672f\u4e3b\u8981\u7528\u4e8e\u9ad8\u901f\u6570\u636e\u4f20\u8f93\uff0c\u4f8b\u5982\u591a\u5a92\u4f53\u6570\u636e\u7684\u4f20\u8f93\uff0c\u5b83\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u4f20\u8f93\u6548\u7387\uff0c\u4ece\u800c\u63d0\u9ad8\u7cfb\u7edf\u6027\u80fd\u3002\u6b64\u5916\uff0c\u5b83\u8fd8\u53ef\u4ee5\u7528\u4e8e\u7f51\u7edc\u4f20\u8f93\uff0c\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u7f51\u7edc\u4f20\u8f93\u7684\u901f\u5ea6\u548c\u7a33\u5b9a\u6027\u3002<\/p>\n
DMA\u4e32\u53e3\u53d1\u9001\u662f\u4e00\u79cd\u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6027\u80fd\u7684\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u5c06\u6570\u636e\u4ece\u5185\u5b58\u4e2d\u76f4\u63a5\u590d\u5236\u5230\u5916\u8bbe\uff0c\u4ece\u800c\u6781\u5927\u5730\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u901f\u5ea6\uff0c\u4ece\u800c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\u3002<\/strong>\u5b83\u7684\u4f18\u70b9\u662f\u53ef\u4ee5\u6781\u5927\u5730\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u901f\u5ea6\uff0c\u4ece\u800c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\uff1b\u51cf\u5c11CPU\u7684\u5de5\u4f5c\u91cf\uff0c\u4ece\u800c\u51cf\u5c11\u7cfb\u7edf\u7684\u529f\u8017\uff1b\u63d0\u9ad8\u7cfb\u7edf\u7684\u7a33\u5b9a\u6027\uff0c\u56e0\u4e3a\u6570\u636e\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u4e0d\u9700\u8981CPU\u53c2\u4e0e\u3002\u5b83\u4e3b\u8981\u7528\u4e8e\u9ad8\u901f\u6570\u636e\u4f20\u8f93\uff0c\u4f8b\u5982\u591a\u5a92\u4f53\u6570\u636e\u7684\u4f20\u8f93\uff0c\u4ee5\u53ca\u7f51\u7edc\u4f20\u8f93\uff0c\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u7f51\u7edc\u4f20\u8f93\u7684\u901f\u5ea6\u548c\u7a33\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":" DMA\u4e32\u53e3\u53d1\u9001\uff08DirectMemoryAccess\uff09\u662f\u4e00\u79cd\u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6027\u80fd\u7684\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u5c06\u6570\u636e\u4ece\u5185\u5b58\u4e2d\u76f4\u63a5\u590d\u5236\u5230\u5916\u8bbe\uff0c\u4ece\u800c\u6781\u5927\u5730\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u901f\u5ea6\uff0c\u4ece\u800c\u63d0\u9ad8\u7cfb\u7edf<\/p>\n","protected":false},"author":1,"featured_media":1839,"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-62631","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-cktx"],"_links":{"self":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/62631","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/comments?post=62631"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/62631\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media\/1839"}],"wp:attachment":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media?parent=62631"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=62631"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=62631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}