{"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\/cs\/blog\/news\/primenenie-asinhronnoj-buferizirovannoj-zapisi-na-baze-io_uring-do-80-raz-snizilo-zaderzhki-v-xfs","title":{"rendered":"Pou\u017eit\u00ed asynchronn\u00edho vyrovn\u00e1vac\u00edho z\u00e1pisu zalo\u017een\u00e9ho na io_uring sn\u00ed\u017eilo latence v XFS a\u017e 80kr\u00e1t","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Byla zve\u0159ejn\u011bna s\u00e9rie patch\u016f pro j\u00e1dro Linux 5.20, kter\u00e1 p\u0159id\u00e1v\u00e1 podporu asynchronn\u00edho vyrovnan\u00e9ho z\u00e1pisu do souborov\u00e9ho syst\u00e9mu XFS pomoc\u00ed mechanismu io_uring. P\u0159edb\u011b\u017en\u00e9 testy v\u00fdkonnosti prov\u00e1d\u011bn\u00e9 pomoc\u00ed n\u00e1stroje fio (1 vl\u00e1kno, velikost bloku 4 kB, 600 sekund, sekven\u010dn\u00ed z\u00e1pis) ukazuj\u00ed zv\u00fd\u0161en\u00ed po\u010dtu operac\u00ed vstupu\/v\u00fdstupu za sekundu (IOPS) z 77k na 209k, p\u0159enosov\u00e9 rychlosti z 314 MB\/s na 854 MB\/s a sn\u00ed\u017een\u00ed latenc\u00ed z 9600 ns na 120 ns (80n\u00e1sobn\u011b).                      sekven\u010dn\u00ed z\u00e1pisy:                   bez patch\u016f           s patchem      libaio     psync    iops:              77k                    209k          195K       233K    bw:               314MB\/s                 854MB\/s       790MB\/s    953MB\/s    clat:            9600ns                   120ns         540ns     3000ns      <\/p>\n<p>Pro z\u00e1jemce o stav io_uring k polovin\u011b roku 2022 se doporu\u010duje sezn\u00e1mit se se slajdy a videoz\u00e1znamem p\u0159edn\u00e1\u0161ky z Kernel Recipes 2022. P\u0159ehledn\u011b se zmi\u0148uj\u00ed zm\u011bny, kter\u00e9 ji\u017e byly zahrnuty do j\u00e1dra a kter\u00e9 se pl\u00e1nuj\u00ed, nap\u0159\u00edklad lze zm\u00ednit podporu:  <\/p>\n<ul>\n<li class=\"l\"> v\u00edcen\u00e1sobn\u00e9ho (multi-shot) accept().\n<li class=\"l\"> v\u00edcevrstvov\u00fd (multi-shot) recv() \u2013 podle test\u016f n\u00e1r\u016fst 6-8% \u2013 od 1150000 do 1200000 RPS.\n<li class=\"l\"> aktualizace a opravy v knihovn\u011b liburing, p\u0159id\u00e1n\u00ed dokumentace a test\u016f.  <\/ul>\n<p>V kontextu p\u0159enositelnosti io_uring se na sn\u00edmc\u00edch zmi\u0148uje v\u00fdznamn\u00e1 podobnost s \u201eI\/O Rings\u201c, pou\u017e\u00edvan\u00fdmi v subsyst\u00e9mu Direct Storage ve Windows 11, a tak\u00e9 mo\u017enost implementace multiplatformn\u00edho provozu, ale z ostatn\u00edch platforem byl na autorov\u011b sn\u00edmku zm\u00edn\u011bn pouze FreeBSD se ot\u00e1zn\u00edkem.    <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=\"P\u0159ehr\u00e1t 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 5.0.3 - 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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vyrovnan\u00e9ho z\u00e1pisu do souborov\u00e9ho syst\u00e9mu XFS pomoc\u00ed mechanismu io_uring.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/primenenie-asinhronnoj-buferizirovannoj-zapisi-na-baze-io_uring-do-80-raz-snizilo-zaderzhki-v-xfs","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","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\u041f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \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 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