{"id":104669,"date":"2022-07-18T21:36:39","date_gmt":"2022-07-18T19:36:39","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/eksperiment-po-povysheniyu-effektivnosti-raboty-utility-cat"},"modified":"2022-07-18T21:36:39","modified_gmt":"2022-07-18T19:36:39","slug":"eksperiment-po-povysheniyu-effektivnosti-raboty-utility-cat","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/news\/eksperiment-po-povysheniyu-effektivnosti-raboty-utility-cat","title":{"rendered":"Experiment f\u00f6r att \u00f6ka effektiviteten hos verktyget cat","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Ariadne Conill, skaparen av musikspelaren Audacious, initiativtagaren till utvecklingen av protokollet IRCv3 och ledaren f\u00f6r s\u00e4kerhetsteamet p\u00e5 Alpine Linux, har genomf\u00f6rt en studie om hur mycket man kan optimera verktyget cat, som skriver ut en eller flera filer till standardutg\u00e5ngen. F\u00f6r att f\u00f6rb\u00e4ttra prestandan hos cat i Linux f\u00f6resl\u00e5s tv\u00e5 alternativ till optimeringar baserade p\u00e5 anv\u00e4ndning av systemanropen sendfile och splice f\u00f6r direkt kopiering av data mellan filbeskrivare p\u00e5 k\u00e4rnniv\u00e5 utan att v\u00e4xla kontext till anv\u00e4ndarutrymme. <\/p>\n

Den grundl\u00e4ggande implementeringen, som anv\u00e4nder traditionella read- och write-anrop som leder till kontextbyten, visade en prestanda p\u00e5 3,6 GB\/s vid kopiering av en 4 GB fil fr\u00e5n tmpfs. Varianten baserad p\u00e5 sendfile gjorde det m\u00f6jligt att \u00f6ka prestandan till 6,4 GB\/s, medan varianten baserad p\u00e5 splice n\u00e5dde 11,6 GB\/s, vilket inneb\u00e4r att den var mer \u00e4n tre g\u00e5nger snabbare \u00e4n den ursprungliga varianten.
\n
K\u00e4lla: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0410\u0440\u0438\u0430\u0434\u043d\u0430 \u041a\u043e\u043d\u0438\u043b\u043b (Ariadne Conill), \u0441\u043e\u0437\u0434\u0430\u0442\u0435\u043b\u044c \u043c\u0443\u0437\u044b\u043a\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0438\u0433\u0440\u044b\u0432\u0430\u0442\u0435\u043b\u044f Audacious, \u0438\u043d\u0438\u0446\u0438\u0430\u0442\u043e\u0440 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 IRCv3 \u0438 \u043b\u0438\u0434\u0435\u0440 \u043a\u043e\u043c\u0430\u043d\u0434\u044b \u043f\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044e \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 Alpine Linux, \u043f\u0440\u043e\u0432\u0435\u043b\u0430 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u0438\u0435 \u043d\u0430\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043c\u043e\u0436\u043d\u043e \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0443\u0442\u0438\u043b\u0438\u0442\u0443 cat, \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u044f\u044e\u0449\u0443\u044e \u0432\u044b\u0432\u043e\u0434 \u0432 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u044b\u0439 \u0432\u044b\u0445\u043e\u0434\u043d\u043e\u0439 \u043f\u043e\u0442\u043e\u043a \u043e\u0434\u043d\u043e\u0433\u043e \u0438\u043b\u0438 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u0444\u0430\u0439\u043b\u043e\u0432. \u0414\u043b\u044f \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 cat \u0432 Linux \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043e \u0434\u0432\u0430 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0430 \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0439, \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043d\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u0445 \u0432\u044b\u0437\u043e\u0432\u043e\u0432 sendfile \u0438 splice […]<\/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-104669","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\udd47Experiment f\u00f6r att \u00f6ka effektiviteten hos verktyget cat | ProHoster","description":"Ariadne Conill, skaparen av musikspelaren Audacious, 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