{"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\/hr\/blog\/news\/arhitektura-nabora-komand-bpf-poluchila-status-predlozhennogo-standarta","title":{"rendered":"Arhitektura skupa instrukcija BPF dobila je status predlo\u017eenog standarda","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

IETF (Internet Engineering Task Force) koji se bavi razvojem protokola i arhitekture interneta, zavr\u0161io je izradu RFC-a za arhitekturu skupa naredbi BPF i objavio prate\u0107u specifikaciju pod identifikatorom RFC 9669. RFC je dobio status \u201ePredlo\u017eenog standarda\u201d, nakon \u010dega \u0107e zapo\u010deti rad na dodeljivanju RFC-u statusa nacrtnog standarda (Draft Standard), \u0161to u su\u0161tini zna\u010di punu stabilizaciju i uva\u017eavanje svih iznetih komentara. <\/p>\n

Objavljena specifikacija opisuje skup instrukcija bajtkoda BPF i niskonaponsku virtualnu ma\u0161inu koja se koristi u podsustavu jezgre Linux eBPF za izvr\u0161avanje vanjskih obrada, sposobnih da u hodu promijene pona\u0161anje sustava bez potrebe za izmjenom koda jezgre. U su\u0161tini, eBPF implementira najjednostavniji virtualni procesor sa svojim skupom registara, RISC-sli\u010dnim instrukcijama, stakom i broja\u010dem instrukcija. BPF programe obi\u010dno stvaraju na podskupu jezika C, nakon \u010dega se prevode u bajtkod pogodan za izvo\u0111enje u virtualnoj ma\u0161ini<\/a>. Virtualna ma\u0161ina mo\u017ee izvr\u0161avati BPF programe kao kori\u0161tenjem interpretacije, tako i primjenom JIT-kompilacije za prevo\u0111enje bajtkoda u strojne instrukcije u hodu. <\/p>\n

Pretpostavlja se da \u0107e standardizacija arhitekture skupa uputa BPF postati poticaj za stvaranje vanjskih implementacija koje su kompatibilne s virtualnom ma\u0161inom eBPF i sposobne izvr\u0161avati BPF programe napisane za jezgru Linux. Na stvaranju takvih virtualnih ma\u0161ina<\/a> rade neki proizvo\u0111a\u010di mre\u017enih adaptora, razvijaju\u0107i sredstva za hardversko ubrzanje izvo\u0111enja BPF obradnika mre\u017enih paketa. Ideja je pro\u0161iriti mogu\u0107nosti podsustava XDP (eXpress Data Path) za izvr\u0161avanje BPF programa ne samo na razini mre\u017enog drajvera, ve\u0107 i na strani mre\u017ene kartice. <\/p>\n

Na primjer, tvrtka Netronome dodala je podr\u0161ku za BPF u adapter Netronome Agilio CX SmartNIC i pru\u017eila skup primjera univerzalnih BPF programa koji se mogu izvr\u0161avati ne samo uz pomo\u0107 CPU-a u jezgru s bilo kojim XDP-kompatibilnim upravlja\u010dem, ve\u0107 i na strani mre\u017ene kartice, \u0161to omogu\u0107uje dono\u0161enje odluka o odbacivanju, izmjeni ili preusmjeravanju paketa bez tro\u0161enja resursa CPU-a. Odvojeno se razvija tehnologija XRP (eXpress Resubmission Path), koja omogu\u0107ava kori\u0161tenje BPF-a za premje\u0161tanje nekih operacija s NVMe pohranama, poput rada s indeksima i agregiranja podataka, na razinu NVMe upravlja\u010da ili na vanjski ure\u0111aj. <\/p>\n

Napominje se da su \u0161irem usvajanju sli\u010dnih mogu\u0107nosti i dalje smetali rizici povezani s kr\u0161enjem kompatibilnosti i potrebom pra\u0107enja stanja eBPF-a u jezgru. Zbog tih rizika neki proizvo\u0111a\u010di su odlo\u017eili uklju\u010divanje sredstava hardverskog ubrzanja BPF-a u svoje ure\u0111aje do formiranja standarda.
\n
Izvor: 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\udd47Arhitektura skupa instrukcija BPF dobila je status predlo\u017eenog standarda | ProHoster","description":"IETF (Internet Engineering Task Force), koji se bavi razvojem internetskih protokola i arhitekture, zavr\u0161io je formiranje RFC-a za arhitekturu skupa instrukcija BPF i objavio pridru\u017eenu specifikaciju 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