{"id":121915,"date":"2025-02-13T20:22:13","date_gmt":"2025-02-13T18:22:13","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obsuzhdenie-uvelicheniya-chastoty-tajmera-v-yadre-linux-do-1000hz-po-umolchaniyu"},"modified":"2025-02-13T20:22:13","modified_gmt":"2025-02-13T18:22:13","slug":"obsuzhdenie-uvelicheniya-chastoty-tajmera-v-yadre-linux-do-1000hz-po-umolchaniyu","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/obsuzhdenie-uvelicheniya-chastoty-tajmera-v-yadre-linux-do-1000hz-po-umolchaniyu","title":{"rendered":"Diskuze o zv\u00fd\u0161en\u00ed frekvence \u010dasova\u010de j\u00e1dra Linux na 1000 Hz jako v\u00fdchoz\u00ed hodnotu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

In\u017een\u00fdr ze spole\u010dnosti Google navrhl zv\u00fd\u0161it frekvenci generov\u00e1n\u00ed p\u0159eru\u0161en\u00ed \u010dasova\u010de v j\u00e1d\u0159e Linux na 1000 Hz jako v\u00fdchoz\u00ed, co\u017e povede ke zv\u00fd\u0161en\u00ed frekvence p\u0159ep\u00edn\u00e1n\u00ed \u00faloh a zmen\u0161en\u00ed \u010dasov\u00e9ho kvanta v pl\u00e1nova\u010di \u00faloh. V sou\u010dasn\u00e9 dob\u011b se pou\u017e\u00edv\u00e1 250 Hz jako ur\u010dit\u00fd kompromis mezi v\u00fdkonem, latenc\u00ed a spot\u0159ebou energie. <\/p>\n

P\u0159i pou\u017e\u00edv\u00e1n\u00ed displej\u016f s obnovovac\u00ed frekvenc\u00ed 120 Hz, co\u017e je b\u011b\u017en\u00e9 u modern\u00edch PC a mobiln\u00edch za\u0159\u00edzen\u00ed, je nep\u0159esnost kvantov\u00e1n\u00ed \u010dasu p\u0159i frekvenci \u010dasova\u010de 250 Hz p\u0159ibli\u017en\u011b polovina doby sn\u00edmku, co\u017e sni\u017euje efektivitu rozd\u011blov\u00e1n\u00ed zdroj\u016f a neumo\u017e\u0148uje dos\u00e1hnout optim\u00e1ln\u00edho pom\u011bru v\u00fdkonu k spot\u0159eb\u011b energie. Spot\u0159eba energie syst\u00e9m\u016f p\u0159i n\u00edzk\u00e9 frekvenci \u010dasova\u010de m\u016f\u017ee b\u00fdt vy\u0161\u0161\u00ed, proto\u017ee mechanismus DVFS (Dynamick\u00e9 \u0159\u00edzen\u00ed nap\u011bt\u00ed a frekvence) pou\u017e\u00edv\u00e1 agresivn\u011bj\u0161\u00ed strategii v\u00fdb\u011bru frekvence, aby nezpomaloval prov\u00e1d\u011bn\u00ed \u00faloh. <\/p>\n

Nast\u00e1vaj\u00ed situace, kdy \u00faloha ji\u017e provedla po\u017eadovan\u00e9 operace, kter\u00e9 vy\u017eadovaly aktivn\u00ed v\u00fdpo\u010dty, ale procesor pokra\u010duje v pr\u00e1ci na zv\u00fd\u0161en\u00e9 frekvenci kv\u016fli kone\u010dnosti \u010dasov\u00e9ho kvanta, kter\u00e9 je\u0161t\u011b neskon\u010dilo. Zv\u00fd\u0161en\u00ed frekvence p\u0159ep\u00edn\u00e1n\u00ed \u00faloh m\u016f\u017ee v\u00e9st ke sn\u00ed\u017een\u00ed spot\u0159eby energie d\u00edky vy\u0161\u0161\u00ed efektivit\u011b dynamick\u00e9ho \u0159\u00edzen\u00ed frekvence (DVFS), p\u0159esn\u011bj\u0161\u00edmu rozd\u011blov\u00e1n\u00ed interval\u016f pl\u00e1nova\u010dem \u00faloh, \u010dast\u011bj\u0161\u00edmu aktualizov\u00e1n\u00ed statistik zat\u00ed\u017een\u00ed CPU a zkr\u00e1cen\u00ed doby str\u00e1ven\u00e9 \u00falohami ve stavu \u010dek\u00e1n\u00ed. <\/p>\n

Jin\u00fd in\u017een\u00fdr z Google navrhl ponechat frekvenci timeru na 250 Hz, proto\u017ee zv\u00fd\u0161en\u00ed frekvence generov\u00e1n\u00ed p\u0159eru\u0161en\u00ed timeru m\u016f\u017ee v\u00e9st k vy\u0161\u0161\u00ed spot\u0159eb\u011b energie u n\u00edzkonap\u011b\u0165ov\u00fdch za\u0159\u00edzen\u00ed, jako jsou desky pro internet v\u011bc\u00ed. Podle jeho odhadu nastaven\u00ed frekvence na 1000 Hz dokonce u za\u0159\u00edzen\u00ed s Androidem vedlo v n\u011bkter\u00fdch situac\u00edch ke zv\u00fd\u0161en\u00ed spot\u0159eby energie procesorem o 7 %. P\u0159i zv\u00fd\u0161en\u00ed frekvence timeru se tak\u00e9 pozoruje \u010dast\u011bj\u0161\u00ed probouzen\u00ed CPU, proto\u017ee p\u0159i frekvenci 250 Hz budou timery nastaven\u00e9 na intervaly t + 1 ms, t + 2 ms, t + 3 ms a t + 4 ms seskupeny a povede to k jednomu probuzen\u00ed, zat\u00edmco p\u0159i 1000 Hz dojde k \u010dty\u0159em samostatn\u00fdm probuzen\u00edm. <\/p>\n

Zdroje Phoronix provedly srovn\u00e1n\u00ed v\u00fdkonu PC na z\u00e1klad\u011b CPU AMD Ryzen 9 9950X. Konfigurace s 1000Hz se uk\u00e1zala b\u00fdt rychlej\u0161\u00ed v testech Llama.cpp, nginx, SuperTuxKart, Selenium a p\u0159i m\u011b\u0159en\u00ed \u010dasu kompilace j\u00e1dra. V testech Darktable, PostgreSQL, Unvanquished, Xonotic, Blender, SVT-AV1, RawTherapee byl v\u00fdkon vy\u0161\u0161\u00ed p\u0159i nastaven\u00ed 250Hz. P\u0159i 1000Hz bylo pr\u016fm\u011brn\u00e9 spot\u0159eba energie 144,2 W, minim\u00e1ln\u00ed \u2014 0,18 W, maxim\u00e1ln\u00ed \u2014 202,13 W, zat\u00edmco p\u0159i 250Hz: pr\u016fm\u011br 144,37 W, minim\u00e1ln\u00ed 0,07 W, maxim\u00e1ln\u00ed \u2014 202 W.

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

\u0418\u043d\u0436\u0435\u043d\u0435\u0440 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Google \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u043b \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0447\u0430\u0441\u0442\u043e\u0442\u0443 \u0433\u0435\u043d\u0435\u0440\u0430\u0446\u0438\u0438 \u043f\u0440\u0435\u0440\u044b\u0432\u0430\u043d\u0438\u0439 \u043e\u0442 \u0442\u0430\u0439\u043c\u0435\u0440\u0430 \u0432 \u044f\u0434\u0440\u0435 Linux \u0434\u043e 1000Hz \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e, \u0447\u0442\u043e \u043f\u0440\u0438\u0432\u0435\u0434\u0451\u0442 \u043a \u0443\u0432\u0435\u043b\u0438\u0447\u0435\u043d\u0438\u044e \u0447\u0430\u0441\u0442\u043e\u0442\u044b \u043f\u0435\u0440\u0435\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0437\u0430\u0434\u0430\u0447 \u0438 \u0443\u043c\u0435\u043d\u044c\u0448\u0435\u043d\u0438\u044e \u043a\u0432\u0430\u043d\u0442\u0430 \u0432\u0440\u0435\u043c\u0435\u043d\u0438 \u0432 \u043f\u043b\u0430\u043d\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0435 \u0437\u0430\u0434\u0430\u0447. \u0412 \u0434\u0430\u043d\u043d\u044b\u0439 \u043c\u043e\u043c\u0435\u043d\u0442 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f 250Hz, \u043a\u0430\u043a \u043d\u0435\u043a\u0438\u0439 \u043a\u043e\u043c\u043f\u0440\u043e\u043c\u0438\u0441\u0441 \u043c\u0435\u0436\u0434\u0443 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c\u044e, \u0437\u0430\u0434\u0435\u0440\u0436\u043a\u0430\u043c\u0438 \u0438 \u044d\u043d\u0435\u0440\u0433\u043e\u043f\u043e\u0442\u0440\u0435\u0431\u043b\u0435\u043d\u0438\u0435\u043c. \u041f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u0434\u0438\u0441\u043f\u043b\u0435\u0435\u0432 \u0441 \u0447\u0430\u0441\u0442\u043e\u0442\u043e\u0439 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f 120Hz, \u0442\u0438\u043f\u0438\u0447\u043d\u044b\u0445 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":121916,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-121915","post","type-post","status-publish","format-standard","has-post-thumbnail","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\udd47Diskuze o zv\u00fd\u0161en\u00ed frekvence timeru v j\u00e1d\u0159e Linuxu na 1000 Hz jako v\u00fdchoz\u00ed | ProHoster","description":"In\u017een\u00fdr z firmy Google navrhl zv\u00fd\u0161it frekvenci generov\u00e1n\u00ed p\u0159eru\u0161en\u00ed od timeru v j\u00e1d\u0159e Linuxu 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