{"id":105185,"date":"2022-09-27T21:36:41","date_gmt":"2022-09-27T19:36:41","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-yadre-linux-najdena-zabytaya-zaplata-vliyayushhaya-na-proizvoditelnost-cpu-amd"},"modified":"2022-09-27T21:36:41","modified_gmt":"2022-09-27T19:36:41","slug":"v-yadre-linux-najdena-zabytaya-zaplata-vliyayushhaya-na-proizvoditelnost-cpu-amd","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/v-yadre-linux-najdena-zabytaya-zaplata-vliyayushhaya-na-proizvoditelnost-cpu-amd","title":{"rendered":"Linuxi tuumas leiti unustatud plekk, mis m\u00f5jutab AMD CPU j\u00f5udlust.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Linux 6.0 tuum, mille v\u00e4ljaandmine on oodata j\u00e4rgmisel esmasp\u00e4eval, sisaldab muudatust, mis lahendab AMD Zen protsessoritega s\u00fcsteemide j\u00f5udlusprobleemid. J\u00f5udluse languse p\u00f5hjuseks oli 20 aastat tagasi lisatud kood, mis oli m\u00f5eldud teatud kiipsete riistvaraprobleemi m\u00f6\u00f6da hiilimiseks. Riistvaraprobleem on juba ammu lahendatud ja ei avaldu enam uuemates kiipsetes, kuid vana lahenduse meetod unustati ja muutus kaasaegseid AMD CPU-sid kasutavate s\u00fcsteemide j\u00f5udluse languse allikaks. Uued Intel CPU-d kasutavad s\u00fcsteemid ei puutu sellesse vanasse lahendusse, kuna nendes p\u00e4\u00e4seb ACPI-le juurde eraldi draiveri intel_idle kaudu, mitte \u00fchise draiveri processor_idle abil. <\/p>\n

Ringhalli man\u00f6\u00f6verd lisati tuumasse m\u00e4rtsis 2002, et blokeerida vea ilmsiks tulek kiibistikus, mis oli seotud ebapiisava h\u00fcpnoosi (idle) oleku seadmisega STPCLK# signaali t\u00f6\u00f6tlemise viivituse t\u00f5ttu. Probleemi lahendamiseks ACPI rakenduses lisati t\u00e4iendav WAIT k\u00e4sk, mis aeglustas protsessorit, et kiibistikul oleks aega minna h\u00fcpnoosi (idle) olekusse. Profiliseerimisel, kasutades IBS (Instruction-Based Sampling) k\u00e4sklusi AMD Zen3 protsessorite peal, leiti, et protsessor veedab m\u00e4rkimisv\u00e4\u00e4rset aega, tehes summutust, mis viib vale t\u00f5lgendamiseni protsessori koormuse seisundist ja s\u00fcgavamate uneolukordade (C-State) seadistamiseni cpuidle t\u00f6\u00f6tleja poolt. <\/p>\n

Selline k\u00e4itumine peegeldub j\u00f5udluse v\u00e4henemises koormustes, kus tihti vahetuvad h\u00fcpnoosi (idle) ja tegevuse (busy) olekud. N\u00e4iteks, kasutades plaati, mis keelab ringhalli man\u00f6\u00f6vri, t\u00f5useb tbench testi keskmine skoor 32191 MB\/s-lt 33805 MB\/s-le.
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u044f\u0434\u0440\u043e Linux 6.0, \u0440\u0435\u043b\u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u043e\u0436\u0438\u0434\u0430\u0435\u0442\u0441\u044f \u0432 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439 \u043f\u043e\u043d\u0435\u0434\u0435\u043b\u044c\u043d\u0438\u043a, \u043f\u0440\u0438\u043d\u044f\u0442\u043e \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0435, \u0440\u0435\u0448\u0430\u044e\u0449\u0435\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0441 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c\u044e \u0441\u0438\u0441\u0442\u0435\u043c \u043d\u0430 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430\u0445 AMD Zen. \u0418\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u043e\u043c \u043f\u0430\u0434\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 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\u0431\u044b\u043b \u0437\u0430\u0431\u044b\u0442 \u0438 \u0441\u0442\u0430\u043b […]<\/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-105185","post","type-post","status-publish","format-standard","hentry","category-news"],"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\udd47Linuxi tuumast leitud unustatud plaastrid, mis m\u00f5jutavad AMD CPU j\u00f5udlust | ProHoster","description":"Linux 6.0 tuuma, mille vabastamine on oodata j\u00e4rgmiseks esmasp\u00e4evaks, sisaldab muudatust, mis lahendab AMD Zen protsessoritel esinevad j\u00f5udlusprobleemid.","canonical_url":"https:\/\/prohoster.info\/et\/blog\/news\/v-yadre-linux-najdena-zabytaya-zaplata-vliyayushhaya-na-proizvoditelnost-cpu-amd","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\udd47\u0412 \u044f\u0434\u0440\u0435 Linux \u043d\u0430\u0439\u0434\u0435\u043d\u0430 \u0437\u0430\u0431\u044b\u0442\u0430\u044f \u0437\u0430\u043f\u043b\u0430\u0442\u0430, \u0432\u043b\u0438\u044f\u044e\u0449\u0430\u044f \u043d\u0430 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