{"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\/es\/blog\/news\/v-yadre-linux-najdena-zabytaya-zaplata-vliyayushhaya-na-proizvoditelnost-cpu-amd","title":{"rendered":"Se ha encontrado un parche olvidado en el n\u00facleo de Linux que afecta el rendimiento de la CPU AMD","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

En el n\u00facleo de Linux 6.0, cuyo lanzamiento se espera el pr\u00f3ximo lunes, se ha realizado un cambio que aborda problemas de rendimiento en sistemas con procesadores AMD Zen. La fuente de la ca\u00edda en el rendimiento fue un c\u00f3digo a\u00f1adido hace 20 a\u00f1os para sortear un problema de hardware en ciertos chipsets. Este problema de hardware ha sido muy bien resuelto y no se presenta en los chipsets actuales, pero el antiguo truco qued\u00f3 olvidado y se convirti\u00f3 en la causa de la disminuci\u00f3n del rendimiento en sistemas basados en las CPUs AMD modernas. Los nuevos sistemas con CPUs Intel no se ven afectados por este truco, ya que en ellos el acceso a ACPI se realiza a trav\u00e9s de un controlador intel_idle separado y no a trav\u00e9s del controlador com\u00fan processor_idle. <\/p>\n

El truco fue a\u00f1adido al n\u00facleo en marzo de 2002 para bloquear la manifestaci\u00f3n de un error en los chipsets relacionado con la falta de un estado de inactividad (idle) debido a la latencia en el procesamiento de la se\u00f1al STPCLK#. Para sortear este problema en la implementaci\u00f3n de ACPI, se a\u00f1ad\u00eda una instrucci\u00f3n adicional WAIT, que ralentizaba el procesador para que el chipset pudiera pasar al estado de inactividad. Al realizar la profilaci\u00f3n utilizando instrucciones IBS (Instruction-Based Sampling) en procesadores AMD Zen3, se descubri\u00f3 que el procesador pasaba un tiempo significativo ejecutando un relleno, lo que llevaba a una interpretaci\u00f3n incorrecta del estado de carga del procesador y a la asignaci\u00f3n de modos de suspensi\u00f3n m\u00e1s profundos (C-State) por parte del controlador cpuidle. <\/p>\n

Este comportamiento se refleja en la disminuci\u00f3n del rendimiento en cargas donde los estados de inactividad (idle) y actividad (busy) alternan frecuentemente. Por ejemplo, al utilizar un parche que desactiva el truco, los promedios de la prueba tbench aumentan de 32191 MB\/s a 33805 MB\/s.
\n
Fuente: 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 \u043e\u043a\u0430\u0437\u0430\u043b\u0441\u044f \u043a\u043e\u0434, \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0439 20 \u043b\u0435\u0442 \u043d\u0430\u0437\u0430\u0434 \u0434\u043b\u044f \u043e\u0431\u0445\u043e\u0434\u0430 \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0432 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0447\u0438\u043f\u0441\u0435\u0442\u0430\u0445. \u0410\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u0430\u044f \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0434\u0430\u0432\u043d\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0438 \u043d\u0435 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432 \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445 \u0447\u0438\u043f\u0441\u0435\u0442\u0430\u0445, \u043d\u043e \u0441\u0442\u0430\u0440\u044b\u0439 \u043e\u0431\u0445\u043e\u0434 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \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\udd47Se encontr\u00f3 un parche olvidado en el n\u00facleo de Linux que afecta el rendimiento de las CPUs AMD | ProHoster","description":"En el n\u00facleo de Linux 6.0, cuyo lanzamiento se espera el pr\u00f3ximo lunes, se ha realizado un cambio que aborda problemas de rendimiento en sistemas con procesadores AMD Zen.","canonical_url":"https:\/\/prohoster.info\/es\/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":"es_ES","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 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c CPU AMD | ProHoster","og:description":"\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.","og:url":"https:\/\/prohoster.info\/es\/blog\/news\/v-yadre-linux-najdena-zabytaya-zaplata-vliyayushhaya-na-proizvoditelnost-cpu-amd","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2022-09-27T19:36:41+00:00","article:modified_time":"2022-09-27T19:36:41+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/posts\/105185","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/comments?post=105185"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/posts\/105185\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/media?parent=105185"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/categories?post=105185"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/es\/wp-json\/wp\/v2\/tags?post=105185"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}