{"id":35585,"date":"2019-10-31T22:05:11","date_gmt":"2019-10-31T19:05:11","guid":{"rendered":"https:\/\/prohoster.info\/blog\/misrosoft-otkryl-kod-sistemy-raspredeleniya-pamyati-mimalloc\/"},"modified":"2019-10-31T22:05:11","modified_gmt":"2019-10-31T19:05:11","slug":"misrosoft-otkryl-kod-sistemy-raspredeleniya-pamyati-mimalloc","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/news\/misrosoft-otkryl-kod-sistemy-raspredeleniya-pamyati-mimalloc","title":{"rendered":"Microsoft har \u00f6ppnat koden f\u00f6r systemet f\u00f6r minnesf\u00f6rdelning mimalloc","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Microsoft har lanserat ett bibliotek under MIT-licensen mimalloc<\/a><\/noindex> med implementationer av ett minnesdistributionssystem, ursprungligen skapat f\u00f6r runtime-komponenter i spr\u00e5k Koka<\/a><\/noindex> och Lean<\/a><\/noindex>. Mimalloc \u00e4r anpassad f\u00f6r anv\u00e4ndning i typiska applikationer utan att deras kod beh\u00f6ver \u00e4ndras och kan fungera som en transparent ers\u00e4ttning f\u00f6r malloc-funktionen. Den st\u00f6der anv\u00e4ndning i Windows, macOS, Linux, BSD och andra Unix-liknande system.<\/p>\n

En nyckelfunktion hos mimalloc \u00e4r kompaktheten i implementationen (mindre \u00e4n 3500 kodrader) och den mycket h\u00f6ga prestandan. I genomf\u00f6rda tester<\/a><\/noindex> har mimalloc \u00f6vertr\u00e4ffat alla konkurrerande minnesdistributionsbibliotek vad g\u00e4ller prestanda, inklusive jemalloc<\/a><\/noindex>, tcmalloc<\/a><\/noindex>, snmalloc<\/a><\/noindex>, rpmalloc<\/a><\/noindex> och Hoard<\/a><\/noindex>. <\/p>\n

F\u00f6r att bed\u00f6ma prestandan har en upps\u00e4ttning redan existerande typiska tester<\/a><\/noindex> I vissa tester \u00f6vertr\u00e4ffar mimalloc andra system med stor marginal, till exempel i testet f\u00f6r migration av objekt mellan olika tr\u00e5dar visade sig mimalloc vara mer \u00e4n 2,5 g\u00e5nger snabbare \u00e4n tcmalloc och jemalloc. Samtidigt observeras i de flesta tester \u00e4ven en l\u00e4gre minnesf\u00f6rbrukning, i vissa situationer kan minnesanv\u00e4ndningen minskas med upp till 25%.<\/p>\n

\"Microsoft<\/center><\/p>\n

Den h\u00f6ga prestandan uppn\u00e5s fr\u00e4mst genom anv\u00e4ndning av segmentering av listan med fria block (free list sharding). Ist\u00e4llet f\u00f6r en stor lista anv\u00e4nder mimalloc en uppdelning i en serie mindre listor, var och en kopplad till en minnessida. Denna metod minskar fragmenteringen och \u00f6kar lokaliseringen av data i minnet. En minnessida definieras som en gruppering av block som \u00e4r lika i storlek. P\u00e5 64-bitars system \u00e4r storleken p\u00e5 en sida vanligtvis 64 KB. Om det inte finns n\u00e5gra anv\u00e4nda block kvar p\u00e5 sidan, frig\u00f6rs den helt och meddelar operativsystemet att minnet har \u00e5tervunnits, vilket minskar minneskostnaderna och fragmenteringen i l\u00e5ngvariga program.<\/p>\n

Biblioteket kan kopplas in under l\u00e4nkning eller lastas in i ett redan sammanst\u00e4llt program («LD_PRELOAD=\\\/usr\\\/bin\\\/libmimalloc.so myprogram»). Biblioteket erbjuder ocks\u00e5 API<\/a><\/noindex> integrering av funktionalitet i runtime och finjustering av beteende, till exempel f\u00f6r att koppla in hanterare f\u00f6r f\u00f6rdr\u00f6jd minnesfrig\u00f6relse och monoton \u00f6kning av referensr\u00e4knare. Det finns m\u00f6jligheter till skapande och anv\u00e4ndning av flera «h\u00f6gar» (heap) i applikationen f\u00f6r f\u00f6rdelning \u00f6ver olika minnesomr\u00e5den. Dessutom \u00e4r det m\u00f6jligt att frig\u00f6ra hela h\u00f6gen utan att g\u00e5 igenom och frig\u00f6ra individuella objekt.<\/p>\n

Det finns m\u00f6jlighet att kompilera biblioteket i s\u00e4kerhetsl\u00e4ge, d\u00e4r det vid blockgr\u00e4nser s\u00e4tts in speciella kontrollsidor f\u00f6r minnet (guard-page), och d\u00e4r dessutom blockf\u00f6rdelningen randomiseras och listorna f\u00f6r frigjorda block krypteras. Dessa \u00e5tg\u00e4rder blockerar de flesta typiska metoderna f\u00f6r att utnyttja buffert\u00f6verskridningar i h\u00f6gar. Vid aktivering av s\u00e4kerhetsl\u00e4ge minskar prestandan med cirka 3%.<\/p>\n

Bland s\u00e4rskildheterna hos mimalloc finns ocks\u00e5 att den inte p\u00e5verkas av problem med uppsvullnad vid h\u00f6g fragmentering. I det s\u00e4msta scenariot \u00f6kar minnesanv\u00e4ndningen med 0,2% f\u00f6r metadata och kan n\u00e5 upp till 16,7% f\u00f6r det f\u00f6rdelade minnet. F\u00f6r att undvika konflikter vid \u00e5tkomst till resurser anv\u00e4nder mimalloc enbart atom\u00e4ra operationer.<\/p>\n

<\/a><\/noindex><\/p>\n

K\u00e4lla: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Mi\u0441rosoft \u043e\u0442\u043a\u0440\u044b\u043b\u0430 \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 MIT \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0443 mimalloc \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u043f\u0430\u043c\u044f\u0442\u0438, \u0438\u0437\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u043e \u0441\u043e\u0437\u0434\u0430\u043d\u043d\u043e\u0439 \u0434\u043b\u044f runtime-\u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043e\u0432 \u044f\u0437\u044b\u043a\u043e\u0432 Koka \u0438 Lean. Mimalloc \u0430\u0434\u0430\u043f\u0442\u0438\u0440\u043e\u0432\u0430\u043d \u0434\u043b\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0432 \u0442\u0438\u043f\u043e\u0432\u044b\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f\u0445 \u0431\u0435\u0437 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0438\u0445 \u043a\u043e\u0434\u0430 \u0438 \u043c\u043e\u0436\u0435\u0442 \u0432\u044b\u0441\u0442\u0443\u043f\u0430\u0442\u044c \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u043f\u0440\u043e\u0437\u0440\u0430\u0447\u043d\u043e\u0439 \u0437\u0430\u043c\u0435\u043d\u044b \u0444\u0443\u043d\u043a\u0446\u0438\u0438 malloc. \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u0440\u0430\u0431\u043e\u0442\u0430 \u0432 Windows, macOS, Linux, BSD \u0438 \u0434\u0440\u0443\u0433\u0438\u0445 Unix-\u043f\u043e\u0434\u043e\u0431\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445. \u041a\u043b\u044e\u0447\u0435\u0432\u043e\u0439 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u044c\u044e mimalloc […]<\/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-35585","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Microsoft har \u00f6ppnat koden f\u00f6r minnesf\u00f6rdelningssystemet mimalloc | ProHoster","description":"Microsoft har sl\u00e4ppt biblioteket mimalloc under MIT-licens, som inneh\u00e5ller en implementation av minnesf\u00f6rdelningssystemet som ursprungligen skapades.","canonical_url":"https:\/\/prohoster.info\/sv\/blog\/news\/misrosoft-otkryl-kod-sistemy-raspredeleniya-pamyati-mimalloc","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sv_SE","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\udd47Mi\u0441rosoft \u043e\u0442\u043a\u0440\u044b\u043b \u043a\u043e\u0434 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u043f\u0430\u043c\u044f\u0442\u0438 mimalloc | ProHoster","og:description":"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Mi\u0441rosoft \u043e\u0442\u043a\u0440\u044b\u043b\u0430 \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 MIT \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0443 mimalloc \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u043f\u0430\u043c\u044f\u0442\u0438, \u0438\u0437\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u043e \u0441\u043e\u0437\u0434\u0430\u043d\u043d\u043e\u0439.","og:url":"https:\/\/prohoster.info\/sv\/blog\/news\/misrosoft-otkryl-kod-sistemy-raspredeleniya-pamyati-mimalloc","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2019-10-31T19:05:11+00:00","article:modified_time":"2019-10-31T19:05:11+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"35585","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":"2026-01-21 23:52:19","breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-03-01 01:59:36","updated":"2026-01-21 23:52:19","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/posts\/35585","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/comments?post=35585"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/posts\/35585\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/media?parent=35585"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/categories?post=35585"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/tags?post=35585"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}