{"id":79056,"date":"2020-04-24T01:42:07","date_gmt":"2020-04-23T23:42:07","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/facebook-predlozhil-novyj-mehanizm-upravleniya-pamyatyu-slab-dlya-yadra-linux"},"modified":"2020-04-24T01:42:07","modified_gmt":"2020-04-23T23:42:07","slug":"facebook-predlozhil-novyj-mehanizm-upravleniya-pamyatyu-slab-dlya-yadra-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/facebook-predlozhil-novyj-mehanizm-upravleniya-pamyatyu-slab-dlya-yadra-linux","title":{"rendered":"Facebook pakkus Linuxi tuumale uut slab-m\u00e4luhalduse mehhanismi.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Roman Gushchin (Roman Gushchin<\/a><\/noindex>) Facebookist avaldas<\/a><\/noindex> Linuxi tuuma arendajate postitusloendis on uus m\u00e4luhalduri kontrolleri implementatsiooni plaastrite komplekt slab<\/a><\/noindex> (slab m\u00e4lu kontroller). Uus kontroller on t\u00e4helepanuv\u00e4\u00e4rne sellega, et viib slab'i arvestuse m\u00e4lu lehek\u00fclgedelt kernel'i objektide tasemele, v\u00f5imaldades slab-lehek\u00fclgede \u00fchist kasutamist erinevates cgroup'ides, selle asemel et eraldada iga cgroup'i jaoks eraldi slab'i vahem\u00e4lud. <\/p>\n

Pakutud l\u00e4henemine v\u00f5imaldab t\u00f5husamat slab'i kasutamist, v\u00e4hendades slab'i jaoks kasutatava m\u00e4lu suurust 30-45% ja oluliselt v\u00e4hendades \u00fcldist m\u00e4lu tarbimist kernelis. Arveplaatide arvu v\u00e4hendamine toob kaasa ka positiivse m\u00f5ju m\u00e4lu killustumise v\u00e4hendamisel. Uus m\u00e4luhaldur lihtsustab slab'i arvestuse koodi ning ei n\u00f5ua keeruliste algoritmide kasutamist slab'i vahem\u00e4lude d\u00fcnaamiliseks loomiseks ja kustutamiseks iga cgroup'i jaoks. K\u00f5ik m\u00e4luga seotud cgroup'id uues rakenduses kasutavad \u00fchiseid slab'i vahem\u00e4lusid, samas kui slab'i vahem\u00e4lude eluaeg ei ole enam seotud cgroup'i elueaga. piirangud<\/a><\/noindex> m\u00e4lu kasutamisele.<\/p>\n

Uues slab-kontrolleris on ressursside t\u00e4psem arvestus, mis teoreetiliselt peaks rohkem koormama CPU-d, kuid praktikas osutusid erinevused ebaoluliseks. Eelk\u00f5ige on uut slab-kontrollerit juba mitu kuud kasutatud Facebooki t\u00f6\u00f6tavatel serveritel, mis t\u00f6\u00f6tlevad erinevaid koormusi, ja m\u00e4rkimisv\u00e4\u00e4rseid regressioone pole seni tuvastatud. Samuti on t\u00e4heldatud m\u00e4rkimisv\u00e4\u00e4rset m\u00e4lu kokkuhoidu \u2014 m\u00f5nel hostil on \u00f5nnestunud s\u00e4\u00e4sta kuni 1GB m\u00e4lu, kuid see n\u00e4itaja s\u00f5ltub suuresti koormuse laadist, RAMi kogusest, CPU-de arvust ja m\u00e4lu t\u00f6\u00f6tlemise erip\u00e4radest. Varem l\u00e4bi viidud testid tulemustest selgus<\/a><\/noindex> m\u00e4lu kasutuse v\u00e4henemine 650\u2013700 MB (42% slab-m\u00e4lust) veebifrontendis, 750\u2013800 MB (35%) andmebaasi vahem\u00e4lu serveris ja 700 MB (36%) DNS-serveris.<\/p>\n

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

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

\u0420\u043e\u043c\u0430\u043d \u0413\u0443\u0449\u0438\u043d (Roman Gushchin) \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Facebook \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u0432 \u0441\u043f\u0438\u0441\u043a\u0435 \u0440\u0430\u0441\u0441\u044b\u043b\u043a\u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u044f\u0434\u0440\u0430 Linux \u043d\u0430\u0431\u043e\u0440 \u043f\u0430\u0442\u0447\u0435\u0439 \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u043d\u043e\u0432\u043e\u0433\u043e \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\u0430 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u043f\u0430\u043c\u044f\u0442\u0438 slab (slab memory controller). \u041d\u043e\u0432\u044b\u0439 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440 \u043f\u0440\u0438\u043c\u0435\u0447\u0430\u0442\u0435\u043b\u0435\u043d \u043f\u0435\u0440\u0435\u043d\u043e\u0441\u043e\u043c \u0443\u0447\u0451\u0442\u0430 slab \u0441 \u0443\u0440\u043e\u0432\u043d\u044f \u0441\u0442\u0440\u0430\u043d\u0438\u0446 \u043f\u0430\u043c\u044f\u0442\u0438 \u043d\u0430 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u0431\u044a\u0435\u043a\u0442\u043e\u0432 \u044f\u0434\u0440\u0430, \u0447\u0442\u043e \u0434\u0430\u0451\u0442 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c slab-\u0441\u0442\u0440\u0430\u043d\u0438\u0446\u044b \u0432 \u0440\u0430\u0437\u043d\u044b\u0445 cgroup, \u0432\u043c\u0435\u0441\u0442\u043e \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0445 \u043a\u044d\u0448\u0435\u0439 slab \u0434\u043b\u044f […]<\/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-79056","post","type-post","status-publish","format-standard","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\udd47Facebook pakkus v\u00e4lja uue slab m\u00e4lu haldamise mehhanismi Linuxi tuumale | ProHoster","description":"Roman Gushchin Facebookist avaldas Linuxi tuumik arendajate meililistis komplekti pat\u0161i, mis sisaldab uut slab m\u00e4lukontrollerit. Uus kontroller on m\u00e4rkimisv\u00e4\u00e4rne, kuna see viib slab'i arvestuse m\u00e4lu lehtedelt tuumobjektide tasemele, v\u00f5imaldades slab-lehtede jagamist erinevates cgroup'ides, selle asemel et eraldada eraldi slab vahepeidavad.","canonical_url":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/facebook-predlozhil-novyj-mehanizm-upravleniya-pamyatyu-slab-dlya-yadra-linux","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"et_EE","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47Facebook \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u043b \u043d\u043e\u0432\u044b\u0439 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