{"id":31148,"date":"2019-10-31T21:39:44","date_gmt":"2019-10-31T18:39:44","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novyj-balansirovshhik-nagruzki-na-cpu-ot-mit\/"},"modified":"2019-10-31T21:39:44","modified_gmt":"2019-10-31T18:39:44","slug":"novyj-balansirovshhik-nagruzki-na-cpu-ot-mit","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/novyj-balansirovshhik-nagruzki-na-cpu-ot-mit","title":{"rendered":"Nov\u00fd zat\u011b\u017eovac\u00ed balancer CPU od MIT","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<h5>Syst\u00e9m Shenango pl\u00e1nuj\u00ed vyu\u017e\u00edt v datov\u00fdch centrech.<\/h5>\n<p>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/it-grad\/blog\/447058\/\"><img decoding=\"async\" alt=\"Nov\u00fd zat\u011b\u017eovac\u00ed balancer CPU od MIT\" src=\"\/wp-content\/uploads\/2019\/04\/9149d445f65d677b43fb02242ae5cc76.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><br \/>\n<i>\/ \u0444\u043e\u0442\u043e <noindex><a rel=\"nofollow\" href=\"https:\/\/www.flickr.com\/photos\/30478819@N08\/45481817492\/\">Marco Verch<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/creativecommons.org\/licenses\/by\/2.0\/\">CC BY<\/a><\/noindex><\/i><\/p>\n<p>Podle jednoho z poskytovatel\u016f, datov\u00e1 centra <noindex><a rel=\"nofollow\" href=\"https:\/\/arxiv.org\/pdf\/1808.02919.pdf\">pou\u017e\u00edvaj\u00ed<\/a><\/noindex> zahod\u00ed celkem 20\u201340% dostupn\u00e9ho v\u00fdpo\u010detn\u00edho v\u00fdkonu. P\u0159i vysok\u00fdch z\u00e1t\u011b\u017e\u00edch tento ukazatel <noindex><a rel=\"nofollow\" href=\"https:\/\/vita.mcafee.cc\/PDF\/EconPublicCloud.pdf\">m\u016f\u017ee dos\u00e1hnout 60%.<\/a><\/noindex>Takov\u00e9 rozd\u011blen\u00ed zdroj\u016f vede k vzniku tzv. \u201ezombie server\u016f\u201c. Jsou to stroje, kter\u00e9 v\u011bt\u0161inu \u010dasu stoj\u00ed nevyu\u017eity, zbyte\u010dn\u011b spot\u0159ebov\u00e1vaj\u00edc\u00ed elektrickou energii. Dnes 30% server\u016f na sv\u011bt\u011b <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/it-grad\/blog\/310630\/\">je ne\u010dinn\u00fdch<\/a><\/noindex>, p\u0159i\u010dem\u017e ro\u010dn\u011b spot\u0159ebov\u00e1vaj\u00ed elektrickou energii za 30 miliard USD.<\/p>\n<p>O neefektivn\u00edm vyu\u017e\u00edv\u00e1n\u00ed v\u00fdpo\u010detn\u00edch zdroj\u016f se rozhodli bojovat na MIT.<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p>T\u00fdm in\u017een\u00fdr\u016f <noindex><a rel=\"nofollow\" href=\"http:\/\/news.mit.edu\/2019\/shenango-data-center-efficiency-0221\">vyvinula<\/a><\/noindex> syst\u00e9mem vyva\u017eov\u00e1n\u00ed z\u00e1t\u011b\u017ee na procesorech nazvan\u00fdm Shenango. Jeho c\u00edlem je monitorovat stav \u00falo\u017ei\u0161t\u011b \u00faloh a redistribuovat \u201euv\u00edznut\u00e9\u201c procesy (kter\u00e9 nemohou z\u00edskat procesorov\u00fd \u010das) na voln\u00e9 stroje.<\/p>\n<h2>Jak funguje Shenango<\/h2>\n<p>\nShenango je Linuxov\u00e1 knihovna napsan\u00e1 v jazyce C s vazbami Rust a C++. K\u00f3d projektu a testovac\u00ed aplikace byly publikov\u00e1ny v <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/shenango\/shenango\">repozit\u00e1\u0159e<\/a><\/noindex> na GitHubu.<\/p>\n<p>Z\u00e1kladem \u0159e\u0161en\u00ed je algoritmus IOKernel, kter\u00fd b\u011b\u017e\u00ed na vyhrazen\u00e9m j\u00e1dru multiprocesorov\u00e9ho syst\u00e9mu. \u0158\u00edd\u00ed po\u017eadavky na CPU pomoc\u00ed frameworku <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Data_Plane_Development_Kit\">DPDK<\/a><\/noindex>, kter\u00fd umo\u017e\u0148uje aplikac\u00edm p\u0159\u00edmo komunikovat se s\u00ed\u0165ov\u00fdmi za\u0159\u00edzen\u00edmi.<\/p>\n<p>IOKernel rozhoduje, kter\u00fdm j\u00e1dr\u016fm p\u0159id\u011blit konkr\u00e9tn\u00ed \u00fakol. Algoritmus tak\u00e9 ur\u010duje, kolik jader bude pot\u0159eba. Pro ka\u017ed\u00fd proces se ur\u010duj\u00ed hlavn\u00ed j\u00e1dra (guaranteed) a dal\u0161\u00ed (burstable) \u2013 druh\u00e1 se spou\u0161t\u00ed v p\u0159\u00edpad\u011b n\u00e1hl\u00e9ho zv\u00fd\u0161en\u00ed po\u010dtu po\u017eadavk\u016f na CPU.<\/p>\n<p>Fronta po\u017eadavk\u016f IOKernel je organizov\u00e1na jako <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Circular_buffer\">kruhov\u00fd buffer.<\/a><\/noindex>Ka\u017ed\u00fdch p\u011bt mikrosekund algoritmus kontroluje, zda byly spln\u011bny v\u0161echny \u00fakoly p\u0159id\u011blen\u00e9 j\u00e1dru. K tomu porovn\u00e1v\u00e1 aktu\u00e1ln\u00ed polohu \u201ehlavy\u201c bufferu s p\u0159edchoz\u00ed pozic\u00ed jeho \u201eocasu\u201c. Pokud se uk\u00e1\u017ee, \u017ee ocas m\u011bl ji\u017e b\u00fdt ve front\u011b v dob\u011b p\u0159edchoz\u00ed kontroly, syst\u00e9m ozna\u010duje p\u0159et\u00ed\u017een\u00ed bufferu a p\u0159id\u011bluje pro proces dal\u0161\u00ed j\u00e1dro.<\/p>\n<p>P\u0159i rozd\u011blov\u00e1n\u00ed z\u00e1t\u011b\u017ee se up\u0159ednost\u0148uj\u00ed j\u00e1dra, na kter\u00fdch byl takov\u00fd proces d\u0159\u00edve prov\u00e1d\u011bn a \u010d\u00e1ste\u010dn\u011b z\u016fstal v cache pam\u011bti, nebo jak\u00e1koliv ne\u010dinn\u00e1 j\u00e1dra.<\/p>\n<p><img decoding=\"async\" alt=\"Nov\u00fd zat\u011b\u017eovac\u00ed balancer CPU od MIT\" src=\"\/wp-content\/uploads\/2019\/04\/899d9585c8361f34cb5602c9a09ffece.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nShenango nav\u00edc vyu\u017e\u00edv\u00e1 p\u0159\u00edstup <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Work_stealing\">work stealing.<\/a><\/noindex>J\u00e1dra vyhrazen\u00e1 pro pr\u00e1ci jedn\u00e9 aplikace sleduj\u00ed po\u010det \u00faloh navz\u00e1jem. Pokud jedno j\u00e1dro dokon\u010d\u00ed sv\u016fj seznam \u00fakol\u016f d\u0159\u00edve ne\u017e ostatn\u00ed, \"sund\u00e1\" \u010d\u00e1st z\u00e1t\u011b\u017ee z okoln\u00edch j\u00e1der.<\/p>\n<h2>V\u00fdhody a nev\u00fdhody<\/h2>\n<p>\nPodle <noindex><a rel=\"nofollow\" href=\"https:\/\/techxplore.com\/news\/2019-02-allocates-time-sensitive-cores-quick-user-response.html\">slov<\/a><\/noindex> in\u017een\u00fdr\u016f z MIT, Shenango je schopno zpracov\u00e1vat p\u011bt milion\u016f po\u017eadavk\u016f za sekundu a udr\u017eovat pr\u016fm\u011brnou dobu odezvy 37 mikrosekund. Odborn\u00edci tvrd\u00ed, \u017ee v n\u011bkter\u00fdch p\u0159\u00edpadech m\u016f\u017ee technologie zv\u00fd\u0161it vyu\u017eit\u00ed procesor\u016f v datov\u00fdch centrech a\u017e na 100 %. V\u00fdsledkem bude, \u017ee provozovatel\u00e9 datov\u00fdch center budou moci u\u0161et\u0159it na n\u00e1kupu a \u00fadr\u017eb\u011b server\u016f.<\/p>\n<p>Potenci\u00e1l \u0159e\u0161en\u00ed <noindex><a rel=\"nofollow\" href=\"http:\/\/news.mit.edu\/2019\/shenango-data-center-efficiency-0221\">uv\u00e1d\u011bj\u00ed<\/a><\/noindex> a specialist\u016f z jin\u00fdch univerzit. Podle profesora z korejsk\u00e9ho institutu pom\u016f\u017ee syst\u00e9m z MIT sn\u00ed\u017eit zpo\u017ed\u011bn\u00ed p\u0159i pr\u00e1ci webov\u00fdch slu\u017eeb. Nap\u0159\u00edklad bude u\u017eite\u010dn\u00fd pro online obchody. V obdob\u00ed v\u00fdprodej\u016f m\u016f\u017ee i sekundy zpo\u017ed\u011bn\u00ed na\u010d\u00edt\u00e1n\u00ed str\u00e1nky <noindex><a rel=\"nofollow\" href=\"https:\/\/www.shopify.com\/enterprise\/black-friday-ecommerce\">uv\u00e1d\u00ed<\/a><\/noindex> na\u010d\u00edt\u00e1n\u00ed str\u00e1nky v\u00e9st ke sn\u00ed\u017een\u00ed po\u010dtu zobrazen\u00ed webu o 11 %. Rychl\u00e9 rozd\u011blen\u00ed z\u00e1t\u011b\u017ee pom\u016f\u017ee obslou\u017eit v\u00edce z\u00e1kazn\u00edk\u016f.<\/p>\n<p>Technologie m\u00e1 zat\u00edm nev\u00fdhody \u2013 nepodporuje v\u00edcej\u00e1drov\u00e9 <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Non-Uniform_Memory_Access\">NUMA<\/a><\/noindex>-syst\u00e9my, kde jsou \u010dipy p\u0159ipojeny k r\u016fzn\u00fdm pam\u011b\u0165ov\u00fdm modul\u016fm a \"nekomunikuj\u00ed\" mezi sebou. V takov\u00e9m p\u0159\u00edpad\u011b m\u016f\u017ee IOKernel regulovat pr\u00e1ci odd\u011blen\u00e9 skupiny procesor\u016f, ale ne v\u0161echny \u010dipy serveru.<\/p>\n<p><img decoding=\"async\" alt=\"Nov\u00fd zat\u011b\u017eovac\u00ed balancer CPU od MIT\" src=\"\/wp-content\/uploads\/2019\/04\/c58be6f2603c7ba8fba2f6030bf4c716.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>\/ \u0444\u043e\u0442\u043e <noindex><a rel=\"nofollow\" href=\"https:\/\/www.flickr.com\/photos\/foto_db\/33508397006\/\">Tim Reckmann<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/creativecommons.org\/licenses\/by\/2.0\/\">CC BY<\/a><\/noindex><\/i><\/p>\n<h2>Analogick\u00e9 technologie<\/h2>\n<p>\nMezi dal\u0161\u00edmi syst\u00e9my zat\u00ed\u017een\u00ed na procesorech lze vyzdvihnout Arachne. Ta vypo\u010d\u00edt\u00e1v\u00e1, kolik jader bude aplikaci pot\u0159eba v okam\u017eiku jej\u00edho spu\u0161t\u011bn\u00ed, a podle tohoto parametru rozd\u011bluje procesy. Podle odhad\u016f autor\u016f je maxim\u00e1ln\u00ed zpo\u017ed\u011bn\u00ed pr\u00e1ce aplikace v Arachne kolem 10 tis\u00edc mikrosekund.<\/p>\n<p>Technologie je realizov\u00e1na ve form\u011b knihovny C++ pro Linux a jej\u00ed zdrojov\u00fd k\u00f3d je k dispozici na <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/PlatformLab\/Arachne\">GitHub<\/a><\/noindex>.<\/p>\n<p>Dal\u0161\u00ed vyva\u017eovac\u00ed n\u00e1stroj je ZygOS. Stejn\u011b jako Shenango technologie pou\u017e\u00edv\u00e1 pro p\u0159erozd\u011blen\u00ed proces\u016f metodu work stealing. Podle \u00fadaj\u016f autor\u016f ZygOS je pr\u016fm\u011brn\u00e9 zpo\u017ed\u011bn\u00ed v pr\u00e1ci aplikac\u00ed p\u0159i pou\u017eit\u00ed n\u00e1stroje p\u0159ibli\u017en\u011b 150 mikrosekund, a maxim\u00e1ln\u00ed zpo\u017ed\u011bn\u00ed je kolem 450 mikrosekund. K\u00f3d projektu je tak\u00e9 <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/ix-project\/zygos\">dostupn\u00fd ve\u0159ejnosti<\/a><\/noindex>.<\/p>\n<h2>Z\u00e1v\u011bry<\/h2>\n<p>\nModern\u00ed datov\u00e1 centra pokra\u010duj\u00ed v roz\u0161i\u0159ov\u00e1n\u00ed, zejm\u00e9na trend zv\u00fd\u0161en\u00ed je patrn\u00fd na trhu hyperscale datov\u00fdch center: nyn\u00ed ve sv\u011bt\u011b <noindex>existuje<\/noindex> 430 hypermasivn\u00edch datov\u00fdch center, av\u0161ak v bl\u00edzk\u00e9 budoucnosti se jejich po\u010det m\u016f\u017ee zv\u00fd\u0161it o 30 %. Z tohoto d\u016fvodu budou technologie vyva\u017eov\u00e1n\u00ed z\u00e1t\u011b\u017ee na procesory velmi \u017e\u00e1dan\u00e9. Syst\u00e9my jako Shenango se ji\u017e te\u010f <noindex><a rel=\"nofollow\" href=\"https:\/\/medium.com\/coinmonks\/maximizing-cpu-resource-utilization-on-servers-fcbbb7908e1c\">implementuj\u00ed<\/a><\/noindex> velk\u00e9 korporace, a v budoucnu toto mno\u017estv\u00ed takov\u00fdch n\u00e1stroj\u016f jen poroste.<\/p>\n<p>\nP\u0159\u00edsp\u011bvky z Prvn\u00edho blogu o podnikov\u00e9 IaaS:<\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/iaas-blog.it-grad.ru\/proizvoditelnost\/kak-povysit-energoeffektivnost-data-centra\/\">Jak zv\u00fd\u0161it energetickou efektivitu datov\u00e9ho centra<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/iaas-blog.it-grad.ru\/novosti\/chto-nuzhno-znat-o-pci-dss-obzor-standarta\/\">Co pot\u0159ebujete v\u011bd\u011bt o PCI DSS: p\u0159ehled standardu<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/iaas-blog.it-grad.ru\/tendencii\/mir-do-i-posle-kak-izmenilas-zhizn-s-nastupleniem-dns-flag-day\/\">Sv\u011bt p\u0159ed a po: jak se \u017eivot zm\u011bnil s p\u0159\u00edchodem DNS Flag Day<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/iaas-blog.it-grad.ru\/tendencii\/kak-iaas-pomogaet-razvivat-biznes-tri-zadachi-kotorye-reshit-oblako\/\">Jak IaaS pom\u00e1h\u00e1 rozv\u00edjet podnik\u00e1n\u00ed: t\u0159i \u00fakoly, kter\u00e9 cloud vy\u0159e\u0161\u00ed<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/iaas-blog.it-grad.ru\/proizvoditelnost\/testirovanie-diskovoj-sistemy-v-oblake\/\">Testov\u00e1n\u00ed diskov\u00e9ho syst\u00e9mu v cloudu: z\u00e1klady a tipy<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/iaas-blog.it-grad.ru\/tendencii\/9-poleznyx-sovetov-dlya-plavnogo-perexoda-v-oblako\/\">9 u\u017eite\u010dn\u00fdch tip\u016f pro plynul\u00fd p\u0159echod do cloudu<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/iaas-blog.it-grad.ru\/funkcionalnost\/iaas-pervye-shagi-posle-arendy-oblachnoj-infrastruktury\/\">IaaS: Prvn\u00ed kroky po pron\u00e1jmu cloudov\u00e9 infrastruktury<\/a><\/noindex><\/li>\n<\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/it-grad\/blog\/447058\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u0438\u0441\u0442\u0435\u043c\u0443 Shenango \u043f\u043b\u0430\u043d\u0438\u0440\u0443\u044e\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0432 \u0434\u0430\u0442\u0430-\u0446\u0435\u043d\u0442\u0440\u0430\u0445. \/ \u0444\u043e\u0442\u043e Marco Verch CC BY \u041f\u043e \u0434\u0430\u043d\u043d\u044b\u043c \u043e\u0434\u043d\u043e\u0433\u043e \u0438\u0437 \u043f\u0440\u043e\u0432\u0430\u0439\u0434\u0435\u0440\u043e\u0432, \u0434\u0430\u0442\u0430-\u0446\u0435\u043d\u0442\u0440\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442 \u0432\u0441\u0435\u0433\u043e 20\u201340% \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b\u0445 \u0432\u044b\u0447\u0438\u0441\u043b\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u043c\u043e\u0449\u043d\u043e\u0441\u0442\u0435\u0439. \u041f\u0440\u0438 \u0432\u044b\u0441\u043e\u043a\u0438\u0445 \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0430\u0445 \u044d\u0442\u043e\u0442 \u043f\u043e\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044c \u043c\u043e\u0436\u0435\u0442 \u0434\u043e\u0441\u0442\u0438\u0433\u0430\u0442\u044c 60%. \u041f\u043e\u0434\u043e\u0431\u043d\u043e\u0435 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0435 \u0440\u0435\u0441\u0443\u0440\u0441\u043e\u0432 \u0432\u0435\u0434\u0435\u0442 \u043a \u043f\u043e\u044f\u0432\u043b\u0435\u043d\u0438\u044e \u0442\u0430\u043a \u043d\u0430\u0437\u044b\u0432\u0430\u0435\u043c\u044b\u0445 \u00ab\u0437\u043e\u043c\u0431\u0438-\u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432\u00bb. \u042d\u0442\u043e \u043c\u0430\u0448\u0438\u043d\u044b, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0431\u043e\u043b\u044c\u0448\u0443\u044e \u0447\u0430\u0441\u0442\u044c \u0432\u0440\u0435\u043c\u0435\u043d\u0438 \u043f\u0440\u043e\u0441\u0442\u0430\u0438\u0432\u0430\u044e\u0442, \u0432\u043f\u0443\u0441\u0442\u0443\u044e \u0440\u0430\u0441\u0445\u043e\u0434\u0443\u044f \u044d\u043b\u0435\u043a\u0442\u0440\u043e\u044d\u043d\u0435\u0440\u0433\u0438\u044e. \u0421\u0435\u0433\u043e\u0434\u043d\u044f 30% \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 \u0432 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":23116,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-31148","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0421\u0438\u0441\u0442\u0435\u043c\u0443 Shenango \u043f\u043b\u0430\u043d\u0438\u0440\u0443\u044e\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0432 \u0434\u0430\u0442\u0430-\u0446\u0435\u043d\u0442\u0440\u0430\u0445.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" 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