{"id":119734,"date":"2024-09-08T15:43:01","date_gmt":"2024-09-08T13:43:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-yadre-linux-6-12-namereny-realizovat-vozmozhnost-vklyucheniya-realtime-rezhima"},"modified":"2024-09-08T15:43:01","modified_gmt":"2024-09-08T13:43:01","slug":"v-yadre-linux-6-12-namereny-realizovat-vozmozhnost-vklyucheniya-realtime-rezhima","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/v-yadre-linux-6-12-namereny-realizovat-vozmozhnost-vklyucheniya-realtime-rezhima","title":{"rendered":"No n\u00facleo Linux 6.12, pretende-se implementar a possibilidade de ativar o modo de tempo real","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Os desenvolvedores do n\u00facleo Linux anunciaram a transfer\u00eancia para a ramifica\u00e7\u00e3o linux-next, que ser\u00e1 utilizada na configura\u00e7\u00e3o da vers\u00e3o 6.12, das mudan\u00e7as finais necess\u00e1rias para compilar o n\u00facleo com a op\u00e7\u00e3o PREEMPT_RT, que inclui recursos para opera\u00e7\u00f5es em tempo real. Ap\u00f3s a aceita\u00e7\u00e3o das mudan\u00e7as na ramifica\u00e7\u00e3o principal do n\u00facleo, o modo PREEMPT_RT estar\u00e1 dispon\u00edvel para as arquiteturas X86, ARM64 e RISC-V. O suporte para as arquiteturas ARM e POWERPC ser\u00e1 adicionado posteriormente, para as quais nem todos os patches foram transmitidos ao n\u00facleo por enquanto.        <\/p>\n<p>O desenvolvimento da implementa\u00e7\u00e3o do modo em tempo real para o n\u00facleo do Linux come\u00e7ou em 2005, no \u00e2mbito do projeto &#171;Realtime-Preempt&#187; (&#171;-rt&#187;), e desde 2015 \u00e9 supervisionado pela organiza\u00e7\u00e3o Linux Foundation. At\u00e9 agora, a implementa\u00e7\u00e3o do modo PREEMPT_RT foi fornecida na forma de patches externos, a partir dos quais algumas distribui\u00e7\u00f5es, como RHEL, SUSE e Ubuntu, criaram edi\u00e7\u00f5es Realtime separadas de seus produtos, que s\u00e3o demandadas em \u00e1reas como sistemas financeiros, dispositivos de processamento de \u00e1udio e v\u00eddeo, avia\u00e7\u00e3o, medicina, rob\u00f3tica, telecomunica\u00e7\u00f5es e sistemas industriais, onde \u00e9 necess\u00e1rio garantir um tempo de processamento de eventos previs\u00edvel.      <\/p>\n<p>Em 2019, come\u00e7ou a promo\u00e7\u00e3o dos patches desenvolvidos no PREEMPT_RT para a composi\u00e7\u00e3o principal do n\u00facleo. No arquivo de configura\u00e7\u00e3o do n\u00facleo 5.3, foi adicionada a op\u00e7\u00e3o PREEMPT_RT para habilitar o modo em tempo real, mas a integra\u00e7\u00e3o das mudan\u00e7as necess\u00e1rias para seu funcionamento se estendeu por 5 anos. Agora, esse caminho est\u00e1 se aproximando do final e, provavelmente, na vers\u00e3o 6.12, o n\u00facleo poder\u00e1 ser compilado no modo PREEMPT_RT sem a aplica\u00e7\u00e3o de patches adicionais.      <\/p>\n<p>A \u00faltima funcionalidade faltante no n\u00facleo, que n\u00e3o permitia ativar o modo PREEMPT_RT, era o suporte \u00e0 sa\u00edda at\u00f4mica n\u00e3o bloqueante atrav\u00e9s da fun\u00e7\u00e3o printk. Essa funcionalidade agora foi aceita na ramifica\u00e7\u00e3o linux-next. A inclus\u00e3o na ramifica\u00e7\u00e3o linux-next tamb\u00e9m aguarda a implementa\u00e7\u00e3o de um console at\u00f4mico e n\u00e3o bloqueante para o driver UART 8250, sem o qual a sa\u00edda de mensagens de emerg\u00eancia no console a partir do c\u00f3digo em contexto at\u00f4mico ainda est\u00e1 desativada.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=61826\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u044f\u0434\u0440\u0430 Linux \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0438 \u043e \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0435 \u0432 \u0432\u0435\u0442\u043a\u0443 linux-next, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0431\u0443\u0434\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u043f\u0440\u0438 \u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0438 \u0432\u044b\u043f\u0443\u0441\u043a\u0430 6.12, \u0444\u0438\u043d\u0430\u043b\u044c\u043d\u044b\u0445 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439, \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u044b\u0445 \u0434\u043b\u044f \u0441\u0431\u043e\u0440\u043a\u0438 \u044f\u0434\u0440\u0430 \u0441 \u043e\u043f\u0446\u0438\u0435\u0439 PREEMPT_RT, \u0432\u043a\u043b\u044e\u0447\u0430\u044e\u0449\u0435\u0439 \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0432 \u0440\u0435\u0436\u0438\u043c\u0435 \u0440\u0435\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u0432\u0440\u0435\u043c\u0435\u043d\u0438. \u041f\u043e\u0441\u043b\u0435 \u043f\u0440\u0438\u043d\u044f\u0442\u0438\u044f \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439 \u0432 \u043e\u0441\u043d\u043e\u0432\u043d\u0443\u044e \u0432\u0435\u0442\u043a\u0443 \u044f\u0434\u0440\u0430 \u0440\u0435\u0436\u0438\u043c PREEMPT_RT \u0441\u0442\u0430\u043d\u0435\u0442 \u0434\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0434\u043b\u044f \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440 X86, ARM64 \u0438 RISC-V. \u041f\u043e\u0437\u0434\u043d\u0435\u0435 \u0431\u0443\u0434\u0435\u0442 \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0430 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-119734","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" 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