{"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\/da\/blog\/news\/arhitektura-nabora-komand-bpf-poluchila-status-predlozhennogo-standarta","title":{"rendered":"Arkitekturen af BPF-kommandoer har f\u00e5et status som foresl\u00e5et standard","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

IETF (Internet Engineering Task Force), der arbejder med udviklingen af internetprotokoller og -arkitektur, har afsluttet udarbejdelsen af RFC for BPF-kommandoarkitekturen og offentliggjort den relaterede specifikation med identifikationen RFC 9669. RFC'en har f\u00e5et status som \"Foresl\u00e5et standard\", hvorefter arbejdet med at give RFC'en status som udkaststandard (Draft Standard) vil begynde, hvilket faktisk betyder fuld stabilisering og hensyntagen til alle fremsatte bem\u00e6rkninger. <\/p>\n

Den offentliggjorte specifikation beskriver et s\u00e6t BPF bytekode instruktioner og en lavniveau virtuel maskine, der anvendes i Linux-kernens eBPF subsystem til at udf\u00f8re eksterne handlere, der i realtid kan \u00e6ndre systemets opf\u00f8rsel uden at \u00e6ndre kernens kode. Grundl\u00e6ggende implementerer eBPF en simpel virtuel processor med sit eget registers\u00e6t, RISC-lignende instruktioner, en stak og en programt\u00e6ller. BPF-programmer oprettes typisk p\u00e5 et delm\u00e6ngde af C-sproget og kompileres derefter til bytekode, der er egnet til udf\u00f8relse i virtuelle maskiner<\/a>. Den virtuelle maskine kan udf\u00f8re BPF-programmer b\u00e5de ved brug af fortolkning og ved at anvende JIT-kompilation til at overs\u00e6tte bytekode til maskininstruktioner i realtid. <\/p>\n

Det forventes, at standardiseringen af BPF-instruktionss\u00e6ttets arkitektur vil stimulere udviklingen af tredjepartsimplementeringer, der er kompatible med eBPF-virtuelle maskiner og i stand til at udf\u00f8re BPF-programmer skrevet til Linux-kernen. Nogle producenter af netv\u00e6rksadaptere arbejder p\u00e5 at udvikle v\u00e6rkt\u00f8jer til hardwareacceleration af udf\u00f8relsen af BPF-netv\u00e6rkspakkehandlere. virtual machines<\/a> Ideen er at udvide mulighederne i XDP (eXpress Data Path) subsystemet til at k\u00f8re BPF-programmer ikke kun p\u00e5 netv\u00e6rksdriverniveau, men ogs\u00e5 p\u00e5 netv\u00e6rkskortets side. <\/p>\n

For eksempel har virksomheden Netronome tilf\u00f8jet underst\u00f8ttelse af BPF i Netronome Agilio CX SmartNIC-adapteren og givet en samling af eksempler p\u00e5 universelle BPF-programmer, der kan k\u00f8re ikke kun ved hj\u00e6lp af CPU i kernen med enhver XDP-kompatibel driver, men ogs\u00e5 p\u00e5 netv\u00e6rkskortet, hvilket g\u00f8r det muligt at tr\u00e6ffe beslutninger om at droppe, \u00e6ndre eller omdirigere pakker uden at bruge CPU-ressourcer. Teknologien XRP (eXpress Resubmission Path) udvikles s\u00e6rskilt, hvilket muligg\u00f8r brugen af BPF til at udf\u00f8re nogle operationer med NVMe-lagring, s\u00e5som arbejde med indekser og dataaggregation, p\u00e5 NVMe-driverniveau eller p\u00e5 en ekstern enhed. <\/p>\n

Det bem\u00e6rkes, at bredere implementering af s\u00e5danne muligheder stadig er h\u00e6mmet af risici relateret til kompatibilitetsproblemer og behovet for at overv\u00e5ge tilstanden af eBPF i kernen. P\u00e5 grund af disse risici har nogle producenter udsat implementeringen af hardwareaccelererede BPF-midler i deres enheder, indtil der er dannet en standard.
\n
Kilde: 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\udd47BPF-kommandoarkitektur har opn\u00e5et status som et foresl\u00e5et standard | ProHoster","description":"IETF-komit\u00e9en (Internet Engineering Task Force), der arbejder med udviklingen af internetprotokoller og -arkitektur, har afsluttet udarbejdelsen af RFC for BPF-kommandoarkitektur og offentliggjort den tilknyttede 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