{"id":104512,"date":"2022-06-27T03:36:42","date_gmt":"2022-06-27T01:36:42","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/primenenie-asinhronnoj-buferizirovannoj-zapisi-na-baze-io_uring-do-80-raz-snizilo-zaderzhki-v-xfs"},"modified":"2022-06-27T03:36:42","modified_gmt":"2022-06-27T01:36:42","slug":"primenenie-asinhronnoj-buferizirovannoj-zapisi-na-baze-io_uring-do-80-raz-snizilo-zaderzhki-v-xfs","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/primenenie-asinhronnoj-buferizirovannoj-zapisi-na-baze-io_uring-do-80-raz-snizilo-zaderzhki-v-xfs","title":{"rendered":"Pou\u017eitie asynchr\u00f3nneho vyrovn\u00e1vacieho z\u00e1pisu na b\u00e1ze io_uring zn\u00ed\u017eilo latencie v XFS a\u017e 80-kr\u00e1t.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Bola uverejnen\u00e1 s\u00e9ria z\u00e1plat na zaradenie do jadra Linux 5.20, ktor\u00e9 prid\u00e1vaj\u00fa podporu asynchr\u00f3nneho vyrovn\u00e1vacieho z\u00e1pisu do s\u00faborov\u00e9ho syst\u00e9mu XFS pomocou mechanizmu io_uring. Predbe\u017en\u00e9 testy v\u00fdkonnosti, vykonan\u00e9 pomocou n\u00e1stroja fio (1 vl\u00e1kno, ve\u013ekos\u0165 bloku 4KB, 600 sek\u00fand, sekven\u010dn\u00fd z\u00e1pis), ukazuj\u00fa n\u00e1rast po\u010dtu oper\u00e1ci\u00ed vstupu\/v\u00fdstupu za sekundu (IOPS) z 77k na 209k, r\u00fdchlosti prenosu d\u00e1t z 314MB\/s na 854MB\/s a pokles latenci\u00ed z 9600ns na 120ns (80-kr\u00e1t).                      sekven\u010dn\u00e9 z\u00e1pisy:                   bez z\u00e1platy           so z\u00e1platou      libaio     psync    iops:              77k                    209k          195K       233K    bw:               314MB\/s                 854MB\/s       790MB\/s    953MB\/s    clat:            9600ns                   120ns         540ns     3000ns      <\/p>\n<p>Pre t\u00fdch, ktor\u00ed maj\u00fa z\u00e1ujem o stav io_uring k polovici roka 2022, sa odpor\u00fa\u010da obozn\u00e1mi\u0165 sa so slidami a videoz\u00e1znamom predn\u00e1\u0161ky z Kernel Recipes 2022. Preh\u013eadne s\u00fa spomenut\u00e9 zmeny, ktor\u00e9 u\u017e vst\u00fapili do jadra a pl\u00e1novan\u00e9, napr\u00edklad m\u00f4\u017eeme poznamena\u0165 podporu:  <\/p>\n<ul>\n<li class=\"l\"> viacn\u00e1sobn\u00e9ho (multi-shot) accept().\n<li class=\"l\"> viacn\u00e1sobn\u00e9ho (multi-shot) recv() \u2014 v testoch n\u00e1rast 6-8% \u2014 od 1150000 do 1200000 RPS.\n<li class=\"l\"> aktualiz\u00e1cie a opravy v kni\u017enici liburing, pridanie dokument\u00e1cie a testov.  <\/ul>\n<p>V kontexte prenosite\u013enosti io_uring sa na slid\u00e1ch spom\u00edna v\u00fdznamn\u00e1 podobnos\u0165 s \u201eI\/O Rings\u201c, pou\u017eitou v podsysteme Direct Storage vo Windows 11, ako aj mo\u017enos\u0165 realiz\u00e1cie kr\u00ed\u017eovej platformovej pr\u00e1ce, pri\u010dom z in\u00fdch platforiem sa na slide autora spom\u00edna iba FreeBSD so znakom ot\u00e1zky.    <center>  <div class=\"youtube-placeholder\" data-id=\"v--rVT4RsCE\" onclick=\"loadVideo(this)\">\r\n        <img decoding=\"async\" src=\"https:\/\/img.youtube.com\/vi\/v--rVT4RsCE\/hqdefault.jpg\" alt=\"Prehrajte video\" loading=\"lazy\" width=\"480\" height=\"360\" style=\"width:100%;height:auto;\">\r\n        <div class=\"play-button\"><\/div>\r\n    <\/div><\/center><br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=57412\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430 \u0441\u0435\u0440\u0438\u044f \u043f\u0430\u0442\u0447\u0435\u0439 \u0434\u043b\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0432 \u044f\u0434\u0440\u043e Linux 5.20, \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u0430\u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e\u0439 \u0431\u0443\u0444\u0435\u0440\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u0437\u0430\u043f\u0438\u0441\u0438 \u0432 \u0444\u0430\u0439\u043b\u043e\u0432\u0443\u044e \u0441\u0438\u0441\u0442\u0435\u043c\u0443 XFS \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 io_uring. \u041f\u0440\u0435\u0434\u0432\u0430\u0440\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u0442\u0435\u0441\u0442\u044b \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438, \u043f\u0440\u043e\u0432\u0435\u0434\u0451\u043d\u043d\u044b\u0435 \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f fio (1 \u043f\u043e\u0442\u043e\u043a, \u0440\u0430\u0437\u043c\u0435\u0440 \u0431\u043b\u043e\u043a\u0430 4\u043a\u0431, 600 \u0441\u0435\u043a\u0443\u043d\u0434, \u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u044c), \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u044e\u0442 \u0443\u0432\u0435\u043b\u0438\u0447\u0435\u043d\u0438\u0435 \u0447\u0438\u0441\u043b\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f \u0432\u0432\u043e\u0434\u0430\/\u0432\u044b\u0432\u043e\u0434\u0430 \u0432 \u0441\u0435\u043a\u0443\u043d\u0434\u0443 (IOPS) \u043e\u0442 77k \u0434\u043e 209k, \u0441\u043a\u043e\u0440\u043e\u0441\u0442\u0438 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u043e\u0442 [&hellip;]<\/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-104512","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430 \u0441\u0435\u0440\u0438\u044f \u043f\u0430\u0442\u0447\u0435\u0439 \u0434\u043b\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0432 \u044f\u0434\u0440\u043e Linux 5.20, \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u0430\u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e\u0439 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