{"id":120511,"date":"2024-11-06T19:09:06","date_gmt":"2024-11-06T17:09:06","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/arhitektura-nabora-komand-bpf-poluchila-status-predlozhennogo-standarta"},"modified":"2024-11-06T19:09:06","modified_gmt":"2024-11-06T17:09:06","slug":"arhitektura-nabora-komand-bpf-poluchila-status-predlozhennogo-standarta","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/arhitektura-nabora-komand-bpf-poluchila-status-predlozhennogo-standarta","title":{"rendered":"A arquitetura do conjunto de instru\u00e7\u00f5es BPF recebeu status de padr\u00e3o proposto","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

O Comit\u00ea IETF (Internet Engineering Task Force), respons\u00e1vel pelo desenvolvimento de protocolos e arquitetura da internet, concluiu a elabora\u00e7\u00e3o do RFC para a arquitetura do conjunto de comandos BPF e publicou a especifica\u00e7\u00e3o correspondente com o identificador RFC 9669. O RFC recebeu o status de \"Padr\u00e3o Proposto\", ap\u00f3s o qual come\u00e7ar\u00e1 o trabalho para conceder ao RFC o status de Padr\u00e3o Rascunho (Draft Standard), o que significa, na pr\u00e1tica, a completa estabiliza\u00e7\u00e3o e considera\u00e7\u00e3o de todos os coment\u00e1rios apresentados. <\/p>\n

A especifica\u00e7\u00e3o publicada descreve um conjunto de instru\u00e7\u00f5es de bytecode BPF e uma m\u00e1quina virtual de baixo n\u00edvel, utilizada no subsistema do n\u00facleo Linux eBPF para executar manipuladores externos, capazes de alterar o comportamento do sistema em tempo real, sem a necessidade de modificar o c\u00f3digo do n\u00facleo. Na pr\u00e1tica, o eBPF implementa um processador virtual b\u00e1sico com seu conjunto de registradores, instru\u00e7\u00f5es semelhantes ao RISC, pilha e contador de instru\u00e7\u00f5es. Os programas BPF geralmente s\u00e3o criados em um subconjunto da linguagem C, e depois compilados em bytecode adequado para execu\u00e7\u00e3o em m\u00e1quina virtual<\/a>. A m\u00e1quina virtual pode executar programas BPF tanto utilizando interpreta\u00e7\u00e3o, quanto aplicando JIT-compila\u00e7\u00e3o para traduzir o bytecode em tempo real em instru\u00e7\u00f5es de m\u00e1quina. <\/p>\n

Espera-se que a padroniza\u00e7\u00e3o da arquitetura do conjunto de instru\u00e7\u00f5es BPF incentive a cria\u00e7\u00e3o de implementa\u00e7\u00f5es de terceiros, compat\u00edveis com a m\u00e1quina virtual eBPF e capazes de executar programas BPF escritos para o n\u00facleo Linux. Alguns fabricantes de adaptadores de rede est\u00e3o trabalhando no desenvolvimento de ferramentas para a acelera\u00e7\u00e3o de hardware da execu\u00e7\u00e3o de manipuladores BPF de pacotes de rede. A ideia \u00e9 expandir as capacidades do subsistema XDP (eXpress Data Path) para a execu\u00e7\u00e3o de programas BPF n\u00e3o apenas no n\u00edvel do driver de rede, mas tamb\u00e9m no lado da placa de rede. m\u00e1quinas virtuais<\/a> trabalham nesta \u00e1rea. <\/p>\n

Por exemplo, a empresa Netronome adicionou suporte a BPF no adaptador Netronome Agilio CX SmartNIC e forneceu uma cole\u00e7\u00e3o de exemplos de programas BPF universais, que podem ser executados n\u00e3o apenas com CPU no n\u00facleo com qualquer driver compat\u00edvel com XDP, mas tamb\u00e9m no lado do cart\u00e3o de rede, permitindo tomar decis\u00f5es sobre descartar, alterar ou redirecionar pacotes sem gastar recursos da CPU. Al\u00e9m disso, a tecnologia XRP (eXpress Resubmission Path) est\u00e1 sendo desenvolvida, permitindo usar BPF para transferir algumas opera\u00e7\u00f5es com unidades NVMe, como gerenciamento de \u00edndices e agrega\u00e7\u00e3o de dados, para o n\u00edvel do driver NVMe ou para um dispositivo externo. <\/p>\n

Destaca-se que a ado\u00e7\u00e3o mais ampla dessas capacidades ainda \u00e9 dificultada pelos riscos associados \u00e0 quebra de compatibilidade e \u00e0 necessidade de monitorar o estado do eBPF no n\u00facleo. Devido a esses riscos, alguns fabricantes adiaram a inclus\u00e3o de recursos de acelera\u00e7\u00e3o de hardware BPF em seus dispositivos at\u00e9 a forma\u00e7\u00e3o de um padr\u00e3o.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u0438\u0442\u0435\u0442 IETF (Internet Engineering Task Force), \u0437\u0430\u043d\u0438\u043c\u0430\u044e\u0449\u0438\u0439\u0441\u044f \u0440\u0430\u0437\u0432\u0438\u0442\u0438\u0435\u043c \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u043e\u0432 \u0438 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b \u0438\u043d\u0442\u0435\u0440\u043d\u0435\u0442\u0430, \u0437\u0430\u0432\u0435\u0440\u0448\u0438\u043b \u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 RFC \u0434\u043b\u044f \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b \u043d\u0430\u0431\u043e\u0440\u0430 \u043a\u043e\u043c\u0430\u043d\u0434 BPF \u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u0443\u044e \u0441 \u043d\u0438\u043c \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044e \u043f\u043e\u0434 \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u043e\u043c RFC 9669. 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[…]<\/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-120511","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47A arquitetura do conjunto de instru\u00e7\u00f5es BPF recebeu o status de padr\u00e3o proposto | ProHoster","description":"O Comit\u00ea IETF (Internet Engineering Task Force), que trabalha no desenvolvimento de protocolos e arquitetura da internet, concluiu a forma\u00e7\u00e3o do RFC para a arquitetura do conjunto de instru\u00e7\u00f5es BPF e publicou a especifica\u00e7\u00e3o 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