{"id":37146,"date":"2019-10-31T22:15:59","date_gmt":"2019-10-31T19:15:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/kompaniya-oracle-namerena-pererabotat-dtrace-dlya-linux-s-ispolzovaniem-ebpf\/"},"modified":"2019-10-31T22:15:59","modified_gmt":"2019-10-31T19:15:59","slug":"kompaniya-oracle-namerena-pererabotat-dtrace-dlya-linux-s-ispolzovaniem-ebpf","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/kompaniya-oracle-namerena-pererabotat-dtrace-dlya-linux-s-ispolzovaniem-ebpf","title":{"rendered":"Ettev\u00f5te Oracle kavatseb DTrace'i Linuxile \u00fcmber t\u00f6\u00f6tada, kasutades eBPF-i","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Oracle Corporation teatas<\/a><\/noindex> DTrace\u2019i muudatuste edastamise t\u00f6\u00f6 ja DTrace\u2019i d\u00fcnaamilise silumise tehnoloogia rakendamise plaanid Linuxi tuuma vaikimisi infrastruktuuri, sealhulgas n\u00e4iteks eBPF alatehnoloogia kasutamise osas. Alguses oli DTrace\u2019i kasutamisel Linuxis peamine probleem litsentsim\u00e4\u00e4ruste \u00fchilduvus, kuid 2018. aastal litsentseeris ettev\u00f5te Oracle uuesti<\/a><\/noindex> DTrace\u2019i koodi GPLv2 alusel. <\/p>\n

DTrace on juba pikka aega<\/a><\/noindex> olemas Oracle Linuxi jaotuse laiendatud tuumas, kuid selle kasutamiseks teistes jaotistes on vajalik rakendada t\u00e4iendavaid tuuma pat\u0161id, mis piirab antud tehnoloogia kasutusv\u00f5imalusi. N\u00e4iteks on Oracle valmistas<\/a><\/noindex> valmistanud p\u00f5hjaliku juhendi DTrace\u2019i installimiseks ja kasutamiseks Fedora Linuxis. Installimiseks on vajalik t\u00f6\u00f6riistadest<\/a><\/noindex> ja Linuxi tuuma, mis on koostatakse Oracle\u2019i ja Fedora pat\u0161idega, t\u00e4iendav muster. , mis k\u00f5rvaldab liigset viivitust MMC draiveris (MMC \u00fchendatakse kaardi p\u00fcsivara kaudu ja draiveri k\u00e4ivitamise hetkel on juba aktiivne) ning k\u00e4ivitab MMC ja FEC (Ethernet) draiverite initsialiseerimise paralleelses re\u017eiimis.<\/a><\/noindex>Kerne v\u00f5ib automatiseerida Oracle\u2019i ja Fedora pat\u0161idega tuuma koostamise protsessi \u00fclesandeid. skripti<\/a><\/noindex>.<\/p>\n

eBPF on Linuxi tuumasse sisseehitatud bytecode\u2019i t\u00f5lkija, mis v\u00f5imaldab luua v\u00f5rgutegevuste t\u00f6\u00f6tlejaid, j\u00e4lgida s\u00fcsteemide t\u00f6\u00f6d, p\u00fc\u00fcda s\u00fcsteemik\u00f5nesid, kontrollida juurdep\u00e4\u00e4su, t\u00f6\u00f6tleda s\u00fcndmusi ajatempleid (perf_event_open) s\u00e4ilitades, lugeda operatsioonide sagedust ja kestust, teostada j\u00e4lgimist kprobes\/uprobes\/tracepoints abil. JIT-kompileerimise kasutamine v\u00f5imaldab bytecode\u2019i koheselt t\u00f5lkida masinakeelde ja k\u00e4itada seda natiivkoodi j\u00f5udlusega. DTrace\u2019i saab rakendada eBPF-i peal, sarnaselt sellele, kuidas on olemasolevad j\u00e4lgimisriistad eBPF-i peal. kasutavad<\/a><\/noindex> DTrace\u2019i tehnoloogia loodi Solaris operatsioonis\u00fcsteemi jaoks, et lahendada d\u00fcnaamilise tuuma j\u00e4lgimise ja l\u00f5pprakenduste j\u00e4lgimise probleeme, andes kasutajale v\u00f5imaluse detailselt j\u00e4lgida s\u00fcsteemi k\u00e4itumist ja reaalajas probleeme diagnoosida. DTrace\u2019i silumise protsess ei m\u00f5juta uuritavate rakenduste t\u00f6\u00f6d ja ei avalda nende j\u00f5udlusele mingit m\u00f5ju, mis v\u00f5imaldab reaalajas t\u00f6\u00f6tavate s\u00fcsteemide anal\u00fc\u00fcsi. DTrace\u2019i tugevuse osas on k\u00f5rgetasemeline D-keel, mis sarnaneb AWK-ga, mille abil on oluliselt lihtsam luua j\u00e4lgimisskripte kui kasutada eBPF-i jaoks pakutud t\u00f6\u00f6tlejate kirjutamise vahendeid C, Python ja Lua keeltel koos v\u00e4limiste bibliotekkidega.<\/p>\n

DTrace tehnoloogia loodi Solaris operatsioonis\u00fcsteemi jaoks, et lahendada d\u00fcnaamilise j\u00e4lgimise \u00fclesandeid, pakkudes kasutajale v\u00f5imalust s\u00fcvitsi j\u00e4lgida s\u00fcsteemi k\u00e4itumist ja reaalajas diagnoosida probleeme. DTrace ei m\u00f5juta debugeerimise k\u00e4igus uuritavate rakenduste t\u00f6\u00f6d ega nende j\u00f5udlust, v\u00f5imaldades seel\u00e4bi anal\u00fc\u00fcsida t\u00f6\u00f6tavaid s\u00fcsteeme jooksvalt. DTrace tugevate k\u00fclgedena mainitakse D-keelt, mis sarnaneb AWK-le, millega on oluliselt lihtsam luua j\u00e4lgimissekke, v\u00f5rreldes eBPF-i jaoks pakutud C, Python ja Lua keeltel v\u00e4liste raamatukogudega kirjutatud t\u00f6\u00f6tlusvahenditega. <\/p>\n

Oracle'i insenerid t\u00f6\u00f6tavad samuti eBPF tagapinna v\u00e4ljat\u00f6\u00f6tamise kallal GCC jaoks ja on juba avaldanud pat\u0161ide kogumit<\/a><\/noindex> eBPF toetuse integreerimiseks GCC-s ja saavutanud<\/a><\/noindex> koodi lisamise GNU binutils jaoks eBPF toe osas. Esialgu p\u00f5hineb eBPF-i toe tagapind LLVM tehnoloogiatel, kuid Oracle on huvitatud GCC-sse eBPF-ile suunatud programmide genereerimise lisamisest, v\u00f5imaldades kasutada \u00fchtset t\u00f6\u00f6riistade kogumit nii Linuxi tuumade kui ka eBPF programmide kompileerimiseks. <\/p>\n

Peale bajtikoodi genereerimiseks m\u00f5eldud tagapinna sisaldavad GCC-le pakutavad plaastrid ka libgcc eBPF-ile portimist ning ELF-failide genereerimise vahendeid, mis v\u00f5imaldavad koodi k\u00e4ivitada eBPF virtuaalmasinas kasutades tuuma pakutavaid laadijaid. Praegu saab bajtikoodiks t\u00f5lkida C keeles kirjutatud koodi (kuid mitte k\u00f5ik keele v\u00f5imalused ei ole saadaval), kuid tulevikus oodatakse C keele toetuse laiendamise, teiste keelte toetamiste, simulaatori loomise ja GCC toe lisamise v\u00f5imaluste suurendamist eBPF programmide t\u00f5rkeotsinguks ilma tuumasse laadimata.<\/p>\n

<\/a><\/noindex><\/p>\n

Allikas: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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