{"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\/sk\/blog\/news\/arhitektura-nabora-komand-bpf-poluchila-status-predlozhennogo-standarta","title":{"rendered":"Architekt\u00fara pr\u00edkazovej sady BPF z\u00edskala status navrhovan\u00e9ho \u0161tandardu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V\u00fdbor IETF (Internet Engineering Task Force), ktor\u00fd sa zaober\u00e1 rozvojom protokolov a architekt\u00fary internetu, dokon\u010dil zostavenie RFC pre architekt\u00faru s\u00faboru pr\u00edkazov BPF a publikoval s n\u00edm spojen\u00fa \u0161pecifik\u00e1ciu pod identifik\u00e1torom RFC 9669. RFC z\u00edskal status \u201eNavrhovan\u00e9ho \u0161tandardu\u201c, po ktorom za\u010dne pr\u00e1ca na udelen\u00ed RFC statusu n\u00e1vrhov\u00e9ho \u0161tandardu (Draft Standard), \u010do v podstate znamen\u00e1 \u00fapln\u00fa stabiliz\u00e1ciu a zoh\u013eadnenie v\u0161etk\u00fdch vznesen\u00fdch pripomienok. <\/p>\n

Zverejnen\u00e1 \u0161pecifik\u00e1cia popisuje s\u00fabor in\u0161trukci\u00ed bajtk\u00f3du BPF a n\u00edzko\u00farov\u0148ov\u00fa virtu\u00e1lnu stroj, pou\u017e\u00edvan\u00fa v subsyst\u00e9me jadra Linux eBPF na vykon\u00e1vanie extern\u00fdch spracovate\u013eov, schopn\u00fdch na \u043b\u0435\u0442\u0443 meni\u0165 spr\u00e1vanie syst\u00e9mu bez nutnosti zmeny k\u00f3du jadra. V podstate eBPF implementuje najjednoduch\u0161\u00ed virtu\u00e1lny procesor so svojou sadou registrov, in\u0161trukciami podobn\u00fdmi RISC, z\u00e1sobn\u00edkom a \u010d\u00edta\u010dom in\u0161trukci\u00ed. Programy BPF sa zvy\u010dajne vytv\u00e1raj\u00fa v poddsahe jazyka C a potom sa kompiluj\u00fa do bajtk\u00f3du vhodn\u00e9ho na vykon\u00e1vanie v virtu\u00e1lnom stroji<\/a>. Virtu\u00e1lna stroj m\u00f4\u017ee vykon\u00e1va\u0165 BPF-programy bu\u010f s pou\u017eit\u00edm interpret\u00e1cie, alebo pomocou JIT-kompil\u00e1cie na pren\u00e1\u0161anie bajtk\u00f3du na \u043b\u0435\u0442\u0443 do strojov\u00fdch in\u0161trukci\u00ed. <\/p>\n

Predpoklad\u00e1 sa, \u017ee \u0161tandardiz\u00e1cia architekt\u00fary sady in\u0161trukci\u00ed BPF sa stane stimulom na vytv\u00e1ranie extern\u00fdch implement\u00e1ci\u00ed, kompatibiln\u00fdch s virtu\u00e1lnou strojom eBPF, a schopn\u00fdch vykon\u00e1va\u0165 BPF-programy nap\u00edsan\u00e9 pre jadro Linux. Na vytv\u00e1ran\u00ed tak\u00fdch virtu\u00e1ln\u00edch stroj\u016f<\/a> pracuj\u00fa niektor\u00ed v\u00fdrobcovia sie\u0165ov\u00fdch adapt\u00e9rov, ktor\u00ed vyv\u00edjaj\u00fa prostriedky na hardv\u00e9rov\u00e9 ur\u00fdchlenie vykon\u00e1vania BPF-spracovate\u013eov sie\u0165ov\u00fdch paketov. My\u0161lienka je roz\u0161\u00edri\u0165 mo\u017enosti subsyst\u00e9mu XDP (eXpress Data Path) na vykon\u00e1vanie BPF-programov nielen na \u00farovni sie\u0165ov\u00e9ho ovl\u00e1da\u010da, ale aj na strane sie\u0165ovej karty. <\/p>\n

Napr\u00edklad, spolo\u010dnos\u0165 Netronome pridala podporu BPF do adapt\u00e9ra Netronome Agilio CX SmartNIC a poskytla kolekciu pr\u00edkladov univerz\u00e1lnych BPF programov, ktor\u00e9 m\u00f4\u017eu by\u0165 vykon\u00e1van\u00e9 nielen pomocou CPU v jadre s ak\u00fdmko\u013evek XDP kompatibiln\u00fdm ovl\u00e1da\u010dom, ale aj na strane sie\u0165ovej karty, \u010do umo\u017e\u0148uje prij\u00edmanie rozhodnut\u00ed o odmietan\u00ed, zmene alebo preposielan\u00ed paketov bez spotreby CPU zdrojov. Osobitne sa vyv\u00edja technol\u00f3gia XRP (eXpress Resubmission Path), ktor\u00e1 umo\u017e\u0148uje pou\u017e\u00edva\u0165 BPF na presunutie niektor\u00fdch oper\u00e1ci\u00ed so zariadeniami NVMe, ako je pr\u00e1ca s indexami a agreg\u00e1cia \u00fadajov, na \u00farove\u0148 ovl\u00e1da\u010da NVMe alebo na extern\u00e9 zariadenie. <\/p>\n

Je zaznamenan\u00e9, \u017ee \u0161ir\u0161iemu nasadeniu tak\u00fdchto mo\u017enost\u00ed doteraz br\u00e1nili rizik\u00e1 spojen\u00e9 s poru\u0161ovan\u00edm kompatibility a potrebou sledovania stavu eBPF v jadre. V d\u00f4sledku t\u00fdchto riz\u00edk niektor\u00ed v\u00fdrobcovia odlo\u017eili aktiv\u00e1ciu prostriedkov hardv\u00e9rovej akceler\u00e1cie BPF vo svojich zariadeniach a\u017e do formulovania \u0161tandardu.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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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\udd47Architekt\u00fara s\u00faboru pr\u00edkazov BPF z\u00edskala status navrhovan\u00e9ho \u0161tandardu | ProHoster","description":"V\u00fdbor IETF (Internet Engineering Task Force), ktor\u00fd sa zaober\u00e1 rozvojom protokolov a architekt\u00fary internetu, dokon\u010dil formul\u00e1ciu RFC pre architekt\u00faru s\u00faboru pr\u00edkazov BPF a zverejnil s \u0148ou s\u00favisiacu 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