{"id":26485,"date":"2017-05-10T12:35:54","date_gmt":"2017-05-10T12:35:54","guid":{"rendered":"https:\/\/dev.railscarma.com\/achieve-parallelism-ruby-mri-io-bound-threads\/"},"modified":"2021-06-05T08:18:05","modified_gmt":"2021-06-05T08:18:05","slug":"uppna-parallellitet-rubin-mri-io-bundna-tradar","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/sv\/blogg\/ror\/uppna-parallellitet-rubin-mri-io-bundna-tradar\/","title":{"rendered":"Hur man uppn\u00e5r parallellitet med Ruby MRI med I\/O-bundna tr\u00e5dar"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"26485\" class=\"elementor elementor-26485\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-16a66803 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"16a66803\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2492c69\" data-id=\"2492c69\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-73417dc elementor-widget elementor-widget-text-editor\" data-id=\"73417dc\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p align=\"justify\">Spr\u00e5ket anv\u00e4nds inte bara av m\u00e4nniskor utan \u00e4ven webbplatser anv\u00e4nder det. Spr\u00e5ket \u00e4r ett av de st\u00f6rsta problemen som programmerare st\u00e5r inf\u00f6r, s\u00e4rskilt n\u00e4r Ruby&#039;s \u00e4r fr\u00e5gan. Prestandan som Ruby&#039;s ger kan vara en av anledningarna till att programmerare inte skulle vilja anv\u00e4nda spr\u00e5ket. P\u00e5 grund av klagom\u00e5len p\u00e5 prestandan om Ruby&#039;s visar det bara att ramverket kommer efter fr\u00e5n andra ramverk som anv\u00e4nds av programmerare idag. \u00c4ven om dessa problem har intr\u00e4ffat p\u00e5 grund av Ruby&#039;s, \u00e4r det l\u00e4tt att anv\u00e4nda.<\/p>\n\n<h2>Fr\u00e5gan kommer alltid att vara, hur kan man n\u00e5 parallellitet med Rubys MRT?<\/h2>\n<p align=\"justify\">F\u00f6r att svara \u00e4r den b\u00e4sta l\u00f6sningen att ha de 1\/0 bundna tr\u00e5darna. Tr\u00e5darna kan p\u00e5verka den parallellitet som syns i processorerna idag. Ruby MRI \u00e4r k\u00e4nt f\u00f6r att vara en icke-anh\u00e4ngare av parallellism. \u00c4ven om du har m\u00e5nga tr\u00e5dar, med Ruby MRI, kommer bara en tr\u00e5d att k\u00f6ras kontinuerligt och det \u00e4r p\u00e5 grund av GIL.<\/p>\n<p align=\"justify\">Det finns p\u00e5st\u00e5enden att Ruby MRI inte kommer att hj\u00e4lpa till att n\u00e5 parallellitet och det \u00e4r allt p\u00e5 grund av GIL, som \u00e4r ansvarig f\u00f6r att inf\u00f6ra restriktioner f\u00f6r tr\u00e5dar. P\u00e5 grund av detta tror folk att Rubyn \u00e4r v\u00e4rdel\u00f6s och inte \u00e4r en bra hj\u00e4lp f\u00f6r att n\u00e5 parallellism. Dessa p\u00e5st\u00e5enden kan vara tillr\u00e4ckligt sanna om du anv\u00e4nder CPU-bundna operationer. Varf\u00f6r? N\u00e4r du anv\u00e4nder CPU-bundna operationer kommer en bra prestanda aldrig att vara uppenbar och kommer alltid att ha l\u00e5g prestanda och allt beror p\u00e5 att tr\u00e5dschemal\u00e4ggningen hanteras av anv\u00e4ndarutrymmet och GIL spelar en stor roll eftersom det \u00e4r den som begr\u00e4nsar tr\u00e5dar.<\/p>\n<p align=\"justify\">I motsats till dessa p\u00e5st\u00e5enden \u00e4r de I\/O-bundna tr\u00e5darna de som hj\u00e4lper till att l\u00e5ta Ruby MRI n\u00e5 parallellism. De I\/O-bundna tr\u00e5darnas hastighet begr\u00e4nsas av I\/O som finns i datorer. Den som hanterar de I\/O-bundna tr\u00e5darna \u00e4r Ruby-tolken som finns i k\u00e4rnutrymmet. Eftersom Ruby-tolken \u00e4r placerad externt kan de I\/O-bundna tr\u00e5darna k\u00f6ras fritt eftersom begr\u00e4nsningar inte finns och kommer att kunna k\u00f6ras parallellt eftersom GIL inte finns. K\u00e4rnutrymmet \u00e4r det som \u00e4r ansvarigt f\u00f6r att schemal\u00e4gga de I\/O-bundna tr\u00e5darna som l\u00e5ter dem k\u00f6ras kontinuerligt p\u00e5 m\u00e5nga hubbar.<\/p>\n<p align=\"justify\">Om du vill att dina tr\u00e5dar ska l\u00f6pa och n\u00e5 parallellitet utan n\u00e5gra restriktioner, \u00e4r Ruby MRI med I\/O-bundna tr\u00e5dar det b\u00e4sta alternativet. Till skillnad fr\u00e5n att anv\u00e4nda CPU-bundna operationer kan du troligen st\u00f6ta p\u00e5 m\u00e5nga begr\u00e4nsningar i din tr\u00e5d eftersom GIL \u00e4r n\u00e4rvarande. Oavsett hur m\u00e5nga tr\u00e5dar du \u00e4n, om GIL finns, kan bara en tr\u00e5d k\u00f6ras samtidigt. \u00c4nd\u00e5, om du anv\u00e4nder Ruby MRI med I\/O-bundna tr\u00e5dar, kan din prestanda f\u00f6rb\u00e4ttras och kommer definitivt att n\u00e5 parallellism. Dessutom, om du arbetar med en I\/O-bunden uppgift, \u00e4r Ruby MRI med I\/O-bundna tr\u00e5dar n\u00e5got f\u00f6r dig eftersom den kan k\u00f6ras parallellt och kommer inte att hindra dig fr\u00e5n att ha flera tr\u00e5dar. Kom bara ih\u00e5g att dina tr\u00e5dar ska vara s\u00e4kra hela tiden.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-140d9c0b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"140d9c0b\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1a5cbdee\" data-id=\"1a5cbdee\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-68711a4c elementor-widget elementor-widget-heading\" data-id=\"68711a4c\" 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The language is one of the main problems that programmers are facing especially when Ruby\u2019s is the matter. The performance that Ruby\u2019s gives can be one of the reasons why programmers would not want to use the language. 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