{"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\/sk\/blog\/news\/v-yadre-linux-najdena-zabytaya-zaplata-vliyayushhaya-na-proizvoditelnost-cpu-amd","title":{"rendered":"V jadre Linux bola n\u00e1jden\u00e1 zabudnut\u00e1 oprava, ktor\u00e1 ovplyv\u0148uje v\u00fdkon CPU AMD","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V jadre Linux 6.0, ktor\u00e9ho vydanie sa o\u010dak\u00e1va bud\u00faci pondelok, bolo prijat\u00e9 zmeny, ktor\u00e9 rie\u0161ia probl\u00e9my s v\u00fdkonom syst\u00e9mov na procesoroch AMD Zen. Zdrojom poklesu v\u00fdkonu bol k\u00f3d pridan\u00fd pred 20 rokmi na ob\u00eddenie hardv\u00e9rov\u00e9ho probl\u00e9mu v niektor\u00fdch \u010dipsetoch. Hardv\u00e9rov\u00fd probl\u00e9m bol d\u00e1vno odstr\u00e1nen\u00fd a neprejavuje sa v aktu\u00e1lnych \u010dipsetoch, ale star\u00e9 ob\u00eddenie probl\u00e9mu bolo zabudnut\u00e9 a stalo sa zdrojom poklesu v\u00fdkonu na syst\u00e9moch zalo\u017een\u00fdch na modern\u00fdch CPU AMD. Nov\u00e9 syst\u00e9my na CPU Intel sa star\u00fdm ob\u00edden\u00edm nevysporiadavaj\u00fa, preto\u017ee v nich je pr\u00edstup k ACPI realizovan\u00fd pomocou oddelen\u00e9ho ovl\u00e1da\u010da intel_idle, a nie spolo\u010dn\u00e9ho ovl\u00e1da\u010da processor_idle. <\/p>\n

Ob\u00eddenie bolo pridan\u00e9 do jadra v marci 2002 na blokovanie prejavu chyby v \u010dipsetoch, s\u00favisiacej s nedostato\u010dnou in\u0161tal\u00e1ciou stavu ne\u010dinnosti (idle) kv\u00f4li oneskoreniu spracovania sign\u00e1lu STPCLK#. Na ob\u00eddenie probl\u00e9mu v implement\u00e1cii ACPI sa prid\u00e1valy dodato\u010dn\u00e9 in\u0161trukcie WAIT, ktor\u00e9 spoma\u013eovali procesor, aby \u010dipset mal \u010das prejs\u0165 do stavu ne\u010dinnosti. Pri profilovan\u00ed s pou\u017eit\u00edm in\u0161trukci\u00ed IBS (Instruction-Based Sampling) na procesoroch AMD Zen3 bolo zisten\u00e9, \u017ee procesor tr\u00e1vi v\u00fdznamn\u00fd \u010das vykon\u00e1van\u00edm <\/p>\n

Podobn\u00e9 spr\u00e1vanie sa odr\u00e1\u017ea v poklese v\u00fdkonu pri z\u00e1\u0165a\u017eiach, v ktor\u00fdch \u010dasto prebiehaj\u00fa prechody medzi stavmi ne\u010dinnosti (idle) a aktivity (busy). Napr\u00edklad pri pou\u017eit\u00ed patchu, ktor\u00fd zakazuje ob\u00eddenie, sa priemern\u00e9 v\u00fdsledky testu tbench zvy\u0161uj\u00fa z 32191 MB\/s na 33805 MB\/s.
\n
Zdroj: 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\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\udd47V jadre Linux sa na\u0161la zabudnut\u00e1 z\u00e1plata, ktor\u00e1 ovplyv\u0148uje v\u00fdkon CPU AMD | ProHoster","description":"V jadre Linux 6.0, ktor\u00e9ho vydanie sa o\u010dak\u00e1va bud\u00faci pondelok, bolo prijat\u00e9 zmeny, ktor\u00e9 rie\u0161ia probl\u00e9my s v\u00fdkonom syst\u00e9mov na procesoroch AMD 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