{"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\/sv\/blog\/news\/arhitektura-nabora-komand-bpf-poluchila-status-predlozhennogo-standarta","title":{"rendered":"Arkitekturen f\u00f6r BPF-instruktionsupps\u00e4ttningen har f\u00e5tt status som ett f\u00f6reslaget standard","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

IETF (Internet Engineering Task Force), som arbetar med utvecklingen av protokoll och arkitektur f\u00f6r internet, har avslutat utarbetandet av RFC f\u00f6r arkitekturen av BPF-kommandon och publicerat en tillh\u00f6rande specifikation med identifikationsnumret RFC 9669. RFC har f\u00e5tt statusen \"F\u00f6reslagen standard\", efter vilken arbetet med att ge RFC status som utkaststandard (Draft Standard) kommer att p\u00e5b\u00f6rjas, vilket i praktiken betyder full stabilisering och beaktande av alla framlagda kommentar. <\/p>\n

Den publicerade specifikationen beskriver ett instruktionsset f\u00f6r BPF-bytecode och en l\u00e5g niv\u00e5 virtuell maskin som anv\u00e4nds i Linux-k\u00e4rnans eBPF-subsystem f\u00f6r att k\u00f6ra externa hanterare som kan \u00e4ndra systembeteendet i realtid utan att beh\u00f6va \u00e4ndra k\u00e4rnkoden. I praktiken implementerar eBPF en grundl\u00e4ggande virtuell processor med sitt eget register, RISC-liknande instruktioner, stack och programr\u00e4knare. BPF-program skapas vanligtvis p\u00e5 en delm\u00e4ngd av programspr\u00e5ket C, och kompileras d\u00e4refter till bytecode som \u00e4r l\u00e4mplig f\u00f6r k\u00f6rning i en virtuell maskin<\/a>. Den virtuella maskinen kan k\u00f6ra BPF-program antingen genom tolkning eller genom att anv\u00e4nda JIT-kompilering f\u00f6r att \u00f6vers\u00e4tta bytecode i realtid till maskininstruktioner. <\/p>\n

Det antas att standardiseringen av BPF-instruktionssetet kommer att fungera som en stimulans f\u00f6r skapandet av tredjepartsimplementationer som \u00e4r kompatibla med den eBPF-virtuella maskinen och som kan k\u00f6ra BPF-program skrivna f\u00f6r Linux-k\u00e4rnan. Vissa tillverkare av n\u00e4tverkskort arbetar med att utveckla verktyg f\u00f6r h\u00e5rdvaruacceleration av BPF-behandlare f\u00f6r n\u00e4tverkspaket. virtuella maskiner<\/a> Id\u00e9n \u00e4r att ut\u00f6ka funktionaliteten i XDP (eXpress Data Path) subsystemet f\u00f6r att k\u00f6ra BPF-program inte bara p\u00e5 niv\u00e5n av n\u00e4tverksdrivrutinen utan \u00e4ven p\u00e5 n\u00e4tverkskortets sida. <\/p>\n

Till exempel har f\u00f6retaget Netronome lagt till st\u00f6d f\u00f6r BPF i adaptern Netronome Agilio CX SmartNIC och tillhandah\u00e5llit en upps\u00e4ttning exempel p\u00e5 generiska BPF-program som kan k\u00f6ras inte bara med CPU i k\u00e4rnan med vilken XDP-kompatibel drivrutin som helst, utan ocks\u00e5 p\u00e5 n\u00e4tverkskortet. Detta g\u00f6r att beslut om att kassera, \u00e4ndra eller omdirigera paket kan fattas utan att belasta CPU-resurser. Dessutom utvecklas teknologin XRP (eXpress Resubmission Path) som m\u00f6jligg\u00f6r anv\u00e4ndning av BPF f\u00f6r att utf\u00f6ra vissa operationer med NVMe-lagringsenheter, s\u00e5som indexhantering och aggregering av data, p\u00e5 NVMe-drivrutinsniv\u00e5 eller p\u00e5 en extern enhet. <\/p>\n

Det p\u00e5pekas att en bredare implementering av s\u00e5dana funktioner fortfarande hindras av risker som \u00e4r kopplade till kompatibilitetsproblem och behovet av att \u00f6vervaka tillst\u00e5ndet f\u00f6r eBPF i k\u00e4rnan. P\u00e5 grund av dessa risker har vissa tillverkare skjutit upp inf\u00f6randet av h\u00e5rdvaruaccelerering av BPF i sina enheter tills ett standardiserat protokoll har utvecklats.
\n
K\u00e4lla: 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-instruktionsupps\u00e4ttningens arkitektur har f\u00e5tt status som f\u00f6reslagen standard | ProHoster","description":"IETF-kommitt\u00e9n (Internet Engineering Task Force), som arbetar med utvecklingen av protokoll och internetarkitektur, har avslutat utarbetandet av RFC f\u00f6r BPF-instruktionsupps\u00e4ttningens arkitektur och publicerat en relaterad 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