{"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\/cs\/blog\/news\/arhitektura-nabora-komand-bpf-poluchila-status-predlozhennogo-standarta","title":{"rendered":"Architektura p\u0159\u00edkazov\u00e9ho souboru BPF z\u00edskala status navrhovan\u00e9ho standardu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Komitet IETF (Internet Engineering Task Force), kter\u00fd se zab\u00fdv\u00e1 rozvojem protokol\u016f a architektury internetu, dokon\u010dil tvorbu RFC pro architekturu souboru p\u0159\u00edkaz\u016f BPF a zve\u0159ejnil s n\u00edm spojenou specifikaci pod identifik\u00e1torem RFC 9669. RFC z\u00edskal status \"Navrhovan\u00e9ho standardu\", po kter\u00e9m za\u010dne pr\u00e1ce na ud\u011blen\u00ed RFC statusu n\u00e1vrhov\u00e9ho standardu (Draft Standard), co\u017e v podstat\u011b znamen\u00e1 plnou stabilizaci a zohledn\u011bn\u00ed v\u0161ech vyj\u00e1d\u0159en\u00fdch p\u0159ipom\u00ednek. <\/p>\n

Publikovan\u00e1 specifikace popisuje sadu instrukc\u00ed bajtk\u00f3du BPF a n\u00edzko\u00farov\u0148ov\u00fd virtu\u00e1ln\u00ed stroj, kter\u00fd se pou\u017e\u00edv\u00e1 v podsystemu j\u00e1dra Linux eBPF pro prov\u00e1d\u011bn\u00ed extern\u00edch zpracovatel\u016f, schopn\u00fdch za chodu m\u011bnit chov\u00e1n\u00ed syst\u00e9mu bez nutnosti zm\u011bny k\u00f3du j\u00e1dra. V podstat\u011b eBPF implementuje nejjednodu\u0161\u0161\u00ed virtu\u00e1ln\u00ed procesor se svou sadou registr\u016f, RISC-podobn\u00fdmi instrukcemi, z\u00e1sobn\u00edkem a \u010d\u00edta\u010dem instrukc\u00ed. Programy BPF se obvykle vytv\u00e1\u0159ej\u00ed na podmno\u017ein\u011b jazyka C, po \u010dem\u017e se kompiluj\u00ed do bajtk\u00f3du vhodn\u00e9ho pro vykon\u00e1v\u00e1n\u00ed v virtu\u00e1ln\u00edm stroji<\/a>. Virtu\u00e1ln\u00ed stroj m\u016f\u017ee prov\u00e1d\u011bt BPF-programy jak pomoc\u00ed interpretace, tak aplikov\u00e1n\u00edm JIT-kompilace pro p\u0159eklad bajtk\u00f3du za chodu do strojov\u00fdch instrukc\u00ed. <\/p>\n

P\u0159edpokl\u00e1d\u00e1 se, \u017ee standardizace architektury sady p\u0159\u00edkaz\u016f BPF bude stimulovat vznik t\u0159et\u00edch stran, kter\u00e9 budou kompatibiln\u00ed s virtu\u00e1ln\u00edm strojem eBPF a schopn\u00e9 vykon\u00e1vat BPF-programy napsan\u00e9 pro j\u00e1dro Linuxu. Na vytvo\u0159en\u00ed takov\u00fdch virtu\u00e1ln\u00edch stroj\u016f<\/a> pracuj\u00ed n\u011bkte\u0159\u00ed v\u00fdrobci s\u00ed\u0165ov\u00fdch adapt\u00e9r\u016f, kte\u0159\u00ed vyv\u00edjej\u00ed prost\u0159edky pro hardwarovou akceleraci vykon\u00e1v\u00e1n\u00ed BPF-zpracovatel\u016f s\u00ed\u0165ov\u00fdch paket\u016f. My\u0161lenka spo\u010d\u00edv\u00e1 v tom, jak roz\u0161\u00ed\u0159it mo\u017enosti podsystemu XDP (eXpress Data Path) pro vykon\u00e1v\u00e1n\u00ed BPF-program\u016f nejen na \u00farovni s\u00ed\u0165ov\u00e9ho ovlada\u010de, ale tak\u00e9 na stran\u011b s\u00ed\u0165ov\u00e9 karty. <\/p>\n

Nap\u0159\u00edklad spole\u010dnost Netronome p\u0159idala podporu BPF do adapt\u00e9ru Netronome Agilio CX SmartNIC a poskytla sb\u00edrku p\u0159\u00edklad\u016f univerz\u00e1ln\u00edch BPF program\u016f, kter\u00e9 mohou b\u00fdt prov\u00e1d\u011bny nejen pomoc\u00ed CPU v j\u00e1d\u0159e s jak\u00fdmkoli ovlada\u010dem kompatibiln\u00edm s XDP, ale tak\u00e9 na stran\u011b s\u00ed\u0165ov\u00e9 karty, co\u017e umo\u017e\u0148uje p\u0159ij\u00edmat rozhodnut\u00ed o odm\u00edtnut\u00ed, zm\u011bn\u011b nebo p\u0159esm\u011brov\u00e1n\u00ed paket\u016f, ani\u017e by byla zat\u011b\u017eov\u00e1na CPU. Samostatn\u011b se rozv\u00edj\u00ed technologie XRP (eXpress Resubmission Path), kter\u00e1 umo\u017e\u0148uje vyu\u017e\u00edt BPF k p\u0159esunut\u00ed n\u011bkter\u00fdch operac\u00ed s NVMe \u00falo\u017ei\u0161ti, jako je pr\u00e1ce s indexy a agregac\u00ed dat, na \u00farove\u0148 ovlada\u010de NVMe nebo na extern\u00ed za\u0159\u00edzen\u00ed. <\/p>\n

Je zaznamen\u00e1no, \u017ee \u0161ir\u0161\u00edmu zaveden\u00ed t\u011bchto mo\u017enost\u00ed st\u00e1le br\u00e1nily rizika spojen\u00e1 s poru\u0161en\u00edm kompatibility a nutnost\u00ed sledov\u00e1n\u00ed stavu eBPF v j\u00e1d\u0159e. Z d\u016fvodu t\u011bchto rizik n\u011bkte\u0159\u00ed v\u00fdrobci odlo\u017eili zapnut\u00ed prost\u0159edk\u016f hardwarov\u00e9 akcelerace BPF ve sv\u00fdch za\u0159\u00edzen\u00edch do doby, ne\u017e bude vytvo\u0159en standard.
\n
Zdroj: 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\udd47Architektura sady instrukc\u00ed BPF z\u00edskala status navrhovan\u00e9ho standardu | ProHoster","description":"V\u00fdbor IETF (Internet Engineering Task Force), kter\u00fd se zab\u00fdv\u00e1 v\u00fdvojem protokol\u016f a architektury internetu, dokon\u010dil formaci RFC pro architekturu sady instrukc\u00ed BPF a zve\u0159ejnil k tomu souvisej\u00edc\u00ed specifikaci 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