{"id":119734,"date":"2024-09-08T15:43:01","date_gmt":"2024-09-08T13:43:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-yadre-linux-6-12-namereny-realizovat-vozmozhnost-vklyucheniya-realtime-rezhima"},"modified":"2024-09-08T15:43:01","modified_gmt":"2024-09-08T13:43:01","slug":"v-yadre-linux-6-12-namereny-realizovat-vozmozhnost-vklyucheniya-realtime-rezhima","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/v-yadre-linux-6-12-namereny-realizovat-vozmozhnost-vklyucheniya-realtime-rezhima","title":{"rendered":"V j\u00e1d\u0159e Linux 6.12 se pl\u00e1nuje implementace mo\u017enosti zapnut\u00ed Realtime re\u017eimu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V\u00fdvoj\u00e1\u0159i j\u00e1dra Linux ozn\u00e1mili p\u0159enos do v\u011btve linux-next, kter\u00e1 bude pou\u017eita p\u0159i p\u0159\u00edprav\u011b vyd\u00e1n\u00ed 6.12, fin\u00e1ln\u00edch zm\u011bn nezbytn\u00fdch pro sestaven\u00ed j\u00e1dra s volbou PREEMPT_RT, zahrnuj\u00edc\u00edmi prost\u0159edky pro pr\u00e1ci v re\u00e1ln\u00e9m \u010dase. Po p\u0159ijet\u00ed zm\u011bn do hlavn\u00ed v\u011btve j\u00e1dra bude re\u017eim PREEMPT_RT dostupn\u00fd pro architektury X86, ARM64 a RISC-V. Pozd\u011bji bude p\u0159id\u00e1na podpora architektur ARM a POWERPC, pro kter\u00e9 zat\u00edm nebyly do j\u00e1dra p\u0159eneseny v\u0161echny patche. <\/p>\n

V\u00fdvoj realizace re\u017eimu re\u00e1ln\u00e9ho \u010dasu pro j\u00e1dro Linux prob\u00edh\u00e1 od roku 2005 v r\u00e1mci projektu \u201eRealtime-Preempt\u201c (\u201e-rt\u201c) a od roku 2015 je \u0159\u00edzen organizac\u00ed Linux Foundation. Dosud byla realizace re\u017eimu PREEMPT_RT dod\u00e1v\u00e1na ve form\u011b extern\u00edch patch\u016f, na jejich\u017e z\u00e1klad\u011b n\u011bkter\u00e9 distribuce, jako RHEL, SUSE a Ubuntu, vytv\u00e1\u0159ely samostatn\u00e9 Realtime verze sv\u00fdch produkt\u016f, \u017e\u00e1dan\u00e9 v oblastech jako jsou finan\u010dn\u00ed syst\u00e9my, za\u0159\u00edzen\u00ed pro zpracov\u00e1n\u00ed zvuku a videa, letectv\u00ed, medic\u00edna, robotika, telekomunika\u010dn\u00ed a pr\u016fmyslov\u00e9 syst\u00e9my, kde je nutn\u00e9 zajistit p\u0159edv\u00eddateln\u00fd \u010das zpracov\u00e1n\u00ed ud\u00e1lost\u00ed. <\/p>\n

V roce 2019 za\u010dalo prosazov\u00e1n\u00ed ve v\u00fdvoji PREEMPT_RT patch\u016f do hlavn\u00edho j\u00e1dra. Do konfigura\u010dn\u00edho souboru j\u00e1dra 5.3 byla p\u0159id\u00e1na volba PREEMPT_RT pro povolen\u00ed re\u017eimu re\u00e1ln\u00e9ho \u010dasu, ale integrace nezbytn\u00fdch zm\u011bn pro jej\u00ed fungov\u00e1n\u00ed se prot\u00e1hla na 5 let. Nyn\u00ed je tento proces bl\u00edzko ukon\u010den\u00ed a pravd\u011bpodobn\u011b ji\u017e ve vyd\u00e1n\u00ed 6.12 bude mo\u017en\u00e9 j\u00e1dro sestavit v re\u017eimu PREEMPT_RT bez pou\u017eit\u00ed dal\u0161\u00edch patch\u016f. <\/p>\n

Posledn\u00ed chyb\u011bj\u00edc\u00ed v j\u00e1d\u0159e funk\u010dnost, kter\u00e1 br\u00e1nila aktivaci re\u017eimu PREEMPT_RT, byla podpora neblokuj\u00edc\u00ed atom\u00e1rn\u00ed v\u00fdstup p\u0159es funkci printk. Tato funk\u010dnost byla nyn\u00ed p\u0159ijata do v\u011btve linux-next. Do v\u011btve linux-next tak\u00e9 \u010dek\u00e1 realizace atom\u00e1rn\u00ed a neblokuj\u00edc\u00ed konzole pro ovlada\u010d UART 8250, bez kter\u00e9 je nyn\u00ed v\u00fdstup nouzov\u00fdch zpr\u00e1v z k\u00f3du v atom\u00e1rn\u00edm kontextu st\u00e1le zak\u00e1z\u00e1n.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u044f\u0434\u0440\u0430 Linux \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0438 \u043e \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0435 \u0432 \u0432\u0435\u0442\u043a\u0443 linux-next, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0431\u0443\u0434\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u043f\u0440\u0438 \u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0438 \u0432\u044b\u043f\u0443\u0441\u043a\u0430 6.12, \u0444\u0438\u043d\u0430\u043b\u044c\u043d\u044b\u0445 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439, \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u044b\u0445 \u0434\u043b\u044f \u0441\u0431\u043e\u0440\u043a\u0438 \u044f\u0434\u0440\u0430 \u0441 \u043e\u043f\u0446\u0438\u0435\u0439 PREEMPT_RT, \u0432\u043a\u043b\u044e\u0447\u0430\u044e\u0449\u0435\u0439 \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430 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