{"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\/pt\/blog\/news\/primenenie-asinhronnoj-buferizirovannoj-zapisi-na-baze-io_uring-do-80-raz-snizilo-zaderzhki-v-xfs","title":{"rendered":"A aplica\u00e7\u00e3o de grava\u00e7\u00e3o bufferizada ass\u00edncrona com base em io_uring reduziu a lat\u00eancia em at\u00e9 80 vezes no XFS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Foi publicada uma s\u00e9rie de patches para inclus\u00e3o no n\u00facleo do Linux 5.20, adicionando suporte \u00e0 grava\u00e7\u00e3o ass\u00edncrona em buffer no sistema de arquivos XFS atrav\u00e9s do mecanismo io_uring. Testes de desempenho preliminares realizados com a ferramenta fio (1 fluxo, tamanho do bloco de 4KB, 600 segundos, grava\u00e7\u00e3o sequencial) mostram um aumento no n\u00famero de opera\u00e7\u00f5es de entrada\/sa\u00edda por segundo (IOPS) de 77k para 209k, taxa de transfer\u00eancia de dados de 314MB\/s para 854MB\/s e redu\u00e7\u00e3o das lat\u00eancias de 9600ns para 120ns (80 vezes).                 grava\u00e7\u00f5es sequenciais:                 sem patch           com patch      libaio     psync    iops:              77k                    209k          195K       233K    bw:               314MB\/s                 854MB\/s       790MB\/s    953MB\/s    clat:            9600ns                   120ns         540ns     3000ns      <\/p>\n<p>Para aqueles interessados no estado do io_uring no meio de 2022, recomenda-se a consulta aos slides e \u00e0 grava\u00e7\u00e3o do v\u00eddeo da apresenta\u00e7\u00e3o no Kernel Recipes 2022. As mudan\u00e7as j\u00e1 inclu\u00eddas no n\u00facleo e planejadas s\u00e3o mencionadas, por exemplo, pode-se destacar o suporte:  <\/p>\n<ul>\n<li class=\"l\"> aceita\u00e7\u00e3o m\u00faltipla (multi-shot) accept().\n<li class=\"l\"> m\u00faltiplo (multi-shot) recv() \u2014 segundo testes, um aumento de 6-8% \u2014 de 1.150.000 a 1.200.000 RPS.\n<li class=\"l\"> atualiza\u00e7\u00e3o e corre\u00e7\u00f5es na biblioteca liburing, adi\u00e7\u00e3o de documenta\u00e7\u00e3o e testes.  <\/ul>\n<p>No contexto da portabilidade do io_uring, menciona-se uma semelhan\u00e7a significativa com 'I\/O Rings', utilizada no subsistema Direct Storage no Windows 11, bem como a possibilidade de implementa\u00e7\u00e3o de trabalho multiplataforma, mas das outras plataformas mencionadas no slide do autor, apenas o FreeBSD aparece com um ponto de interroga\u00e7\u00e3o.    <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=\"Por que no hosting comum a administra\u00e7\u00e3o do PrestaShop \u00e9 lenta, e no seu n\u00e3o \u00e9?\" 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 \/>Fonte: <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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