{"id":90050,"date":"2020-07-28T13:42:44","date_gmt":"2020-07-28T11:42:44","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/google-nachal-otkrytie-realizaczii-modeli-potokov-mn"},"modified":"2020-07-28T13:42:44","modified_gmt":"2020-07-28T11:42:44","slug":"google-nachal-otkrytie-realizaczii-modeli-potokov-mn","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/google-nachal-otkrytie-realizaczii-modeli-potokov-mn","title":{"rendered":"Google on alustanud M:N voogude mudeli rakendamise avamist","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Google pakkus<\/a><\/noindex> Linuxi tuumale esmakordselt pakettide komplekt, mis sisaldab komponente, mis on vajalikud M:N voogude mudeli toimimiseks. Google'i algatus on seotud uue API avamisega, mis on varem olnud suletud uste taga SwitchTo<\/a><\/noindex> Linuxi tuum, mis v\u00f5imaldab kasutajaruumi mitme l\u00f5ime s\u00fcsteemi, kasutades M:N voogude mudelit. Seda s\u00fcsteemi kasutab Google, et tagada teenuste t\u00f6\u00f6tamine, mis n\u00f5uab minimaalset latentsust. L\u00f5imede ajakava ja jaotuse haldamine toimub t\u00e4ielikult kasutajaruumi tasemel, mis v\u00f5imaldab oluliselt v\u00e4hendada konteksti vahetuse operatsioone, minimeerides s\u00fcsteemik\u00f5nesid.<\/p>\n

Linuxi tuumiku tasemel selle alam s\u00fcsteemi t\u00f6\u00f6 tagamiseks on rakendatud API SwitchTo, mis pakub kolme p\u00f5hioperatsiooni \u2014 wait, resume ja swap (vahetamine). Uue FUTEX_SWAP operatsiooni kood on ettepanek lisamiseks tuumikusse. FUTEX_WAIT ja FUTEX_WAKE<\/a><\/noindex>, ja pakub aluse mitme l\u00f5ime teekide loomiseks kasutaja ruumis. FUTEX_SWAP'i saab kasutada ka \u00fclesannete vahelise suhtluse edastamiseks, sarnaselt RPC-le. N\u00e4iteks praegu n\u00f5uab \u00fclesannete vaheline suhtlus v\u00e4hemalt nelja FUTEX_WAIT ja FUTEX_WAKE kutset, samas kui FUTEX_SWAP'i kasutamine v\u00f5imaldab \u00fche toimingu teha, mis toimub 5-10 korda kiiremini.<\/p>\n

\"Google<\/a><\/noindex><\/center><\/p>\n

Praegu kasutatakse praktikas peamiselt 1:1 ja N:1 l\u00f5imemudeleid. 1:1 mudelit kasutatakse NPTL<\/a><\/noindex> (POSIX l\u00f5imede) ja LinuxThreads<\/a><\/noindex>, mis t\u00e4hendab otsekohe l\u00f5ime kaardistamist kasutaja ruumis l\u00f5ime (t\u00e4itmise planeerimise \u00fcksuse) tasemel tuumas\u00fcsteemis. N:1 mudel on teostatud GNU Pth<\/a><\/noindex>, viies l\u00f5imede ajakava kasutaja ruumi ja v\u00f5imaldades N l\u00f5ime kasutaja ruumis siduda \u00fche l\u00f5imega tuumas, samas ei tea tuum kasutaja l\u00f5imede kohta.<\/p>\n

Mudeli 1:1 p\u00f5hikompleksne puudus on suur konteksti vahetamise kulu tuuma ja kasutaja ruumi vahel. Mudel N:1 lahendab selle probleemi, kuid loob uue \u2014 kuna tuuma voog on \u00fcheainsana planeeritav, siis kasutaja vood, mis on seotud \u00fche tuuma vooga, ei saa hajuda CPU tuumade vahel ja j\u00e4\u00e4vad kinni \u00fchele CPU tuumale.<\/p>\n

M:N mudel on h\u00fcbriid, mis k\u00f5rvaldab k\u00f5ik varem kirjeldatud puudused, sidudes N kasutuseruumi voogu M vooga OS tuumas, v\u00f5imaldades nii v\u00e4hendada kontekstivahetuse kulusid kui ka tagada m\u00f5\u00f5detavus CPU tuumade vahel. Antud variandi hind on suures t\u00e4iendav keerukus voogude ajakava rakendamisel kasutuseruumis ja vajadus koosk\u00f5lastusmehhanismide j\u00e4rele tuuma ajakava halduriga.<\/p>\n

\r\n \"Vaata\r\n
<\/div>\r\n <\/div><\/center><\/p>\n

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

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

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Google \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u043b\u0430 \u0434\u043b\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 \u044f\u0434\u0440\u0430 Linux \u043f\u0435\u0440\u0432\u044b\u0439 \u043d\u0430\u0431\u043e\u0440 \u043f\u0430\u0442\u0447\u0435\u0439 \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043e\u0432, \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u044b\u0445 \u0434\u043b\u044f \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u043c\u043e\u0434\u0435\u043b\u0438 \u043f\u043e\u0442\u043e\u043a\u043e\u0432 M:N. \u0418\u043d\u0438\u0446\u0438\u0430\u0442\u0438\u0432\u0430 Google \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043e\u0442\u043a\u0440\u044b\u0442\u0438\u0435\u043c \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0432\u0448\u0435\u0433\u043e\u0441\u044f \u0437\u0430 \u0437\u0430\u043a\u0440\u044b\u0442\u044b\u043c\u0438 \u0434\u0432\u0435\u0440\u044f\u043c\u0438 API SwitchTo \u0434\u043b\u044f \u044f\u0434\u0440\u0430 Linux, \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0440\u0430\u0431\u043e\u0442\u0443 \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u0432 \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u043e\u0439 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u044b, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u044e\u0449\u0435\u0439 \u043c\u043e\u0434\u0435\u043b\u044c \u043f\u043e\u0442\u043e\u043a\u043e\u0432 M:N. \u041f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u0432 Google \u0434\u043b\u044f \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f \u0440\u0430\u0431\u043e\u0442\u044b […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":90051,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-90050","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\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\n","aioseo_head_json":{"title":"\ud83e\udd47Google alustas M:N voogude mudeli rakendamise avamist | ProHoster","description":"Google pakkus Linuxi tuumale sisseviimiseks esimese t\u00f6\u00f6riistakomplekti M:N voogude mudeli toetamiseks vajalike komponentide rakendamiseks. Google's algatus on seotud varjatud API SwitchTo avamisega Linuxi tuumas, mis toetab kasutajaruumi rakendatud M:N voogude mudeli mitme l\u00f5imealuse s\u00fcsteemi toimimist. 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