{"id":6575,"date":"2024-06-06T11:03:24","date_gmt":"2024-06-06T11:03:24","guid":{"rendered":"http:\/\/the-codest.localhost\/dictionary\/direct-memory-access-dma\/"},"modified":"2024-06-06T11:03:24","modified_gmt":"2024-06-06T11:03:24","slug":"acesso-direto-a-memoria-dma","status":"publish","type":"dictionary","link":"https:\/\/thecodest.co\/pt\/dictionary\/direct-memory-access-dma\/","title":{"rendered":"Acesso direto \u00e0 mem\u00f3ria Dma"},"content":{"rendered":"<h1>Acesso direto \u00e0 mem\u00f3ria (DMA)<\/h1>\n<p>O acesso direto \u00e0 mem\u00f3ria (DMA) \u00e9 uma funcionalidade de hardware de computador que permite <a href=\"https:\/\/thecodest.co\/pt\/blog\/app-data-collection-security-risks-value-and-types-explored\/\">dados<\/a> para serem transferidos entre dispositivos e mem\u00f3ria sem a interven\u00e7\u00e3o da CPU. O DMA permite que dispositivos como placas de som, adaptadores de rede e discos r\u00edgidos transfiram dados diretamente de e para a mem\u00f3ria, libertando a CPU para realizar outras tarefas.<\/p>\n<p>O DMA \u00e9 particularmente \u00fatil na transfer\u00eancia de grandes quantidades de dados, pois pode reduzir significativamente a quantidade de sobrecarga da CPU necess\u00e1ria para a transfer\u00eancia. Isto pode levar a um melhor desempenho do sistema e a uma lat\u00eancia reduzida.<\/p>\n<p>Existem dois tipos de DMA: DMA de dom\u00ednio do barramento e DMA de terceiros. O DMA de dom\u00ednio do barramento permite que um dispositivo assuma o controlo do barramento do sistema e efectue transfer\u00eancias diretamente, enquanto o DMA de terceiros envolve um controlador de DMA dedicado que gere as transfer\u00eancias em nome dos dispositivos.<\/p>\n<p>Embora o DMA possa melhorar muito o desempenho do sistema, tamb\u00e9m pode introduzir riscos de seguran\u00e7a. O software malicioso pode potencialmente explorar o DMA para aceder a dados sens\u00edveis na mem\u00f3ria, levando a viola\u00e7\u00f5es de dados ou outros incidentes de seguran\u00e7a. Como tal, \u00e9 importante implementar medidas de seguran\u00e7a adequadas, como a prote\u00e7\u00e3o DMA, para mitigar estes riscos.<\/p>\n<p>Em resumo, o DMA \u00e9 uma funcionalidade de hardware que permite aos dispositivos transferir dados diretamente de e para a mem\u00f3ria sem a interven\u00e7\u00e3o da CPU. Pode melhorar significativamente o desempenho do sistema, mas tamb\u00e9m introduz riscos de seguran\u00e7a que devem ser abordados.<\/p>","protected":false},"excerpt":{"rendered":"<p>Saiba mais sobre o Acesso Direto \u00e0 Mem\u00f3ria (DMA) e como este pode melhorar o desempenho do sistema ao permitir que os dispositivos transfiram dados diretamente de e para a mem\u00f3ria. #DMA #desempenho do sistema<\/p>","protected":false},"template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-6575","dictionary","type-dictionary","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Direct Memory Access Dma - The Codest<\/title>\n<meta name=\"description\" content=\"Learn about Direct Memory Access (DMA) and how it can improve system performance by allowing devices to transfer data directly to and from memory. #DMA #systemperformance\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/thecodest.co\/pt\/dicionario\/acesso-direto-a-memoria-dma\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Direct Memory Access Dma\" \/>\n<meta property=\"og:description\" content=\"Learn about Direct Memory Access (DMA) and how it can improve system performance by allowing devices to transfer data directly to and from memory. #DMA #systemperformance\" \/>\n<meta property=\"og:url\" content=\"https:\/\/thecodest.co\/pt\/dicionario\/acesso-direto-a-memoria-dma\/\" \/>\n<meta property=\"og:site_name\" content=\"The Codest\" \/>\n<meta property=\"og:image\" content=\"https:\/\/thecodest.co\/app\/uploads\/2024\/06\/cover-image.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/thecodest.co\\\/dictionary\\\/direct-memory-access-dma\\\/\",\"url\":\"https:\\\/\\\/thecodest.co\\\/dictionary\\\/direct-memory-access-dma\\\/\",\"name\":\"Direct Memory Access Dma - The Codest\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/thecodest.co\\\/#website\"},\"datePublished\":\"2024-06-06T11:03:24+00:00\",\"description\":\"Learn about Direct Memory Access (DMA) and how it can improve system performance by allowing devices to transfer data directly to and from memory. #DMA #systemperformance\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/thecodest.co\\\/dictionary\\\/direct-memory-access-dma\\\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/thecodest.co\\\/dictionary\\\/direct-memory-access-dma\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/thecodest.co\\\/dictionary\\\/direct-memory-access-dma\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/thecodest.co\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Dictionary\",\"item\":\"https:\\\/\\\/thecodest.co\\\/sv\\\/ordbok\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Direct Memory Access Dma\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/thecodest.co\\\/#website\",\"url\":\"https:\\\/\\\/thecodest.co\\\/\",\"name\":\"The Codest\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/thecodest.co\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/thecodest.co\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"pt-PT\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/thecodest.co\\\/#organization\",\"name\":\"The Codest\",\"url\":\"https:\\\/\\\/thecodest.co\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-PT\",\"@id\":\"https:\\\/\\\/thecodest.co\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/thecodest.co\\\/app\\\/uploads\\\/2024\\\/03\\\/thecodest-logo.svg\",\"contentUrl\":\"https:\\\/\\\/thecodest.co\\\/app\\\/uploads\\\/2024\\\/03\\\/thecodest-logo.svg\",\"width\":144,\"height\":36,\"caption\":\"The Codest\"},\"image\":{\"@id\":\"https:\\\/\\\/thecodest.co\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/pl.linkedin.com\\\/company\\\/codest\",\"https:\\\/\\\/clutch.co\\\/profile\\\/codest\"]}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Acesso direto \u00e0 mem\u00f3ria Dma - The Codest","description":"Saiba mais sobre o Acesso Direto \u00e0 Mem\u00f3ria (DMA) e como este pode melhorar o desempenho do sistema ao permitir que os dispositivos transfiram dados diretamente de e para a mem\u00f3ria. #DMA #desempenho do sistema","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/thecodest.co\/pt\/dicionario\/acesso-direto-a-memoria-dma\/","og_locale":"pt_PT","og_type":"article","og_title":"Direct Memory Access Dma","og_description":"Learn about Direct Memory Access (DMA) and how it can improve system performance by allowing devices to transfer data directly to and from memory. #DMA #systemperformance","og_url":"https:\/\/thecodest.co\/pt\/dicionario\/acesso-direto-a-memoria-dma\/","og_site_name":"The Codest","og_image":[{"width":1200,"height":675,"url":"https:\/\/thecodest.co\/app\/uploads\/2024\/06\/cover-image.png","type":"image\/png"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/thecodest.co\/dictionary\/direct-memory-access-dma\/","url":"https:\/\/thecodest.co\/dictionary\/direct-memory-access-dma\/","name":"Acesso direto \u00e0 mem\u00f3ria Dma - The Codest","isPartOf":{"@id":"https:\/\/thecodest.co\/#website"},"datePublished":"2024-06-06T11:03:24+00:00","description":"Saiba mais sobre o Acesso Direto \u00e0 Mem\u00f3ria (DMA) e como este pode melhorar o desempenho do sistema ao permitir que os dispositivos transfiram dados diretamente de e para a mem\u00f3ria. #DMA #desempenho do sistema","breadcrumb":{"@id":"https:\/\/thecodest.co\/dictionary\/direct-memory-access-dma\/#breadcrumb"},"inLanguage":"pt-PT","potentialAction":[{"@type":"ReadAction","target":["https:\/\/thecodest.co\/dictionary\/direct-memory-access-dma\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/thecodest.co\/dictionary\/direct-memory-access-dma\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/thecodest.co\/"},{"@type":"ListItem","position":2,"name":"Dictionary","item":"https:\/\/thecodest.co\/sv\/ordbok\/"},{"@type":"ListItem","position":3,"name":"Direct Memory Access Dma"}]},{"@type":"WebSite","@id":"https:\/\/thecodest.co\/#website","url":"https:\/\/thecodest.co\/","name":"The Codest","description":"","publisher":{"@id":"https:\/\/thecodest.co\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/thecodest.co\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"pt-PT"},{"@type":"Organization","@id":"https:\/\/thecodest.co\/#organization","name":"The Codest","url":"https:\/\/thecodest.co\/","logo":{"@type":"ImageObject","inLanguage":"pt-PT","@id":"https:\/\/thecodest.co\/#\/schema\/logo\/image\/","url":"https:\/\/thecodest.co\/app\/uploads\/2024\/03\/thecodest-logo.svg","contentUrl":"https:\/\/thecodest.co\/app\/uploads\/2024\/03\/thecodest-logo.svg","width":144,"height":36,"caption":"The Codest"},"image":{"@id":"https:\/\/thecodest.co\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/pl.linkedin.com\/company\/codest","https:\/\/clutch.co\/profile\/codest"]}]}},"_links":{"self":[{"href":"https:\/\/thecodest.co\/pt\/wp-json\/wp\/v2\/dictionary\/6575","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/thecodest.co\/pt\/wp-json\/wp\/v2\/dictionary"}],"about":[{"href":"https:\/\/thecodest.co\/pt\/wp-json\/wp\/v2\/types\/dictionary"}],"version-history":[{"count":0,"href":"https:\/\/thecodest.co\/pt\/wp-json\/wp\/v2\/dictionary\/6575\/revisions"}],"wp:attachment":[{"href":"https:\/\/thecodest.co\/pt\/wp-json\/wp\/v2\/media?parent=6575"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}