{"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\/novosti-interneta\/kompaniya-oracle-namerena-pererabotat-dtrace-dlya-linux-s-ispolzovaniem-ebpf","title":{"rendered":"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> t\u00f6\u00f6tamisest seoses DTrace'iga seotud muudatuste edastamisega upstream'ile ja plaanidest rakendada DTrace d\u00fcnaamilise silumise tehnoloogiat Linuxi p\u00f5hinfrastruktuuri kaudu, kasutades n\u00e4iteks selliseid alams\u00fcsteeme nagu eBPF. Esialgu oli DTrace'i kasutamise peamine probleem Linuxis litsentsitaseme kokkusobimatus, kuid 2018. aastal litsentseeris<\/a><\/noindex> DTrace'i koodi GPLv2 alusel. <\/p>\n

DTrace on juba pikalt<\/a><\/noindex> olemas laiendatud tuumas Oracle Linuxi distributsioonis, kuid selle kasutamiseks teistes distributsioonides on vajalik tuuma t\u00e4iendavate patch'ide rakendamine, mis piirab antud tehnoloogia kasutamist. N\u00e4iteks, Oracle valmistas<\/a><\/noindex> jagab p\u00f5hjalikku juhendit DTrace'i installimiseks ja kasutamiseks Fedora Linuxis. Installimiseks on vajalik ette valmistada t\u00f6\u00f6riistakomplektist<\/a><\/noindex> ja kasutada Linuxi tuuma, mis on kokku pandud plekkidega<\/a><\/noindex>. Oracle'i ja Fedora patch'idega tuuma koostamise automatiseerimiseks on v\u00e4lja pakutud skripti<\/a><\/noindex>.<\/p>\n

eBPF on Linux'i kernelisse sisseehitatud bytecode'i interpreter, mis v\u00f5imaldab luua v\u00f5rgutegevuse t\u00f6\u00f6tlejat, j\u00e4lgida s\u00fcsteemide t\u00f6\u00f6d, kinni p\u00fc\u00fcda s\u00fcsteemik\u00f5nesid, kontrollida ligip\u00e4\u00e4su, hallata s\u00fcndmusi aja t\u00e4histamisega (perf_event_open), arvestada operatsioonide sagedust ja kestust, ning teostada j\u00e4lgimist kprobes\/uprobes\/tracepoints'i abil. JIT-kompileerimise kasutamine v\u00f5imaldab bytecode'i reaalajas masiinijuhisteks transleerimist, pakkudes natiivse koodi tasemel suurendatud j\u00f5udlust. DTrace'i saab rakendada eBPF-i peal, sarnaselt sellele, kuidas see on eBPF-i peal. t\u00f6\u00f6tavad<\/a><\/noindex> olemasolevad j\u00e4lgimisvahendid.<\/p>\n

DTrace tehnoloogia, mis on v\u00e4lja t\u00f6\u00f6tatud Solaris operatsioonis\u00fcsteemi jaoks, lahendab s\u00fcsteemi tuumade ja l\u00f5pprakenduste d\u00fcnaamilise j\u00e4lgimise \u00fclesandeid, v\u00f5imaldades kasutajal p\u00f5hjalikult j\u00e4lgida s\u00fcsteemi k\u00e4itumist ja reaalajas diagnostikat teha. DTrace ei m\u00f5juta silumiste protsessi uuringu all olevate rakenduste toimimist ega m\u00f5juta nende j\u00f5udlust, mis v\u00f5imaldab korraldada t\u00f6\u00f6tavate s\u00fcsteemide anal\u00fc\u00fcsi lennult. DTrace tugevateks k\u00fclgedeks on k\u00f5rgtasemeline D keel, mis sarnaneb AWK-ga, millega on palju lihtsam luua j\u00e4lgimisskripte kui eBPF-ile pakutud C, Python ja Lua keelte ning v\u00e4liste teekide kaudu t\u00f6\u00f6tades. <\/p>\n

Oracle'i insenerid t\u00f6\u00f6tavad samuti eBPF-tagaside rajamise kallal GCC jaoks ja on juba avaldanud patchide komplekt<\/a><\/noindex> eBPF toe integreerimise jaoks GCC-s ja on saavutanud<\/a><\/noindex> eBPF-i toe koodi integreerimise tugi GNU binutils. Algselt p\u00f5hines eBPF-i toe backend tehnoloogiatel LLVM, kuid Oracle on huvitatud GCC-sse eBPF-i vahelise programmi genereerimise s\u00fcndmuse lisamisest, mis v\u00f5imaldab kasutada \u00fchte t\u00f6\u00f6riistakomplekti nii Linuxi kerneli kui ka eBPF-i programmide koostamiseks. <\/p>\n

Lisaks bytecode genereerimise backendile sisaldavad GCC-le pakutavad plaastrid ka libgcc porti eBPF-ile ning ELF-failide genereerimise t\u00f6\u00f6riistu, mis v\u00f5imaldavad koodi k\u00e4ivitada eBPF-i virtuaalmasinas, kasutades tuuma pakutavaid laadijaid. Bytecode'iks saab hetkel t\u00f5lkida C-keeles kirjutatud koodi (kuid mitte k\u00f5ik keele v\u00f5imalused ei ole saadaval), kuid tulevikus oodatakse C-keele kasutusv\u00f5imaluste laienemist, teiste keelte toe lisamist, simulaatori loomist ja GCC toe lisamist eBPF-programmide silumisel ilma tuumas 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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