{"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\/et\/blog\/novosti-interneta\/misrosoft-otkryl-kod-sistemy-raspredeleniya-pamyati-mimalloc","title":{"rendered":"Microsoft avalikustas m\u00e4lu jaotuss\u00fcsteemi mimalloc allika.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Microsoft avas MIT-litsentsi all v\u00e4lja raamteegi mimalloc<\/a><\/noindex> m\u00e4luhalduss\u00fcsteemi implementatsioonidest, mis loodi algselt programmeerimiskeelte runtime-komponentide jaoks Koka<\/a><\/noindex> ja Lean<\/a><\/noindex>. Mimalloc on kohandatud kasutamiseks tavap\u00e4rastes rakendustes ilma nende koodi muutmata ja v\u00f5ib toimida l\u00e4bipaistva asendusena malloc-funktsioonile. Toetatakse Windowsi, macOS-i, Linuxi, BSD-d ja muid Unixilaadseid s\u00fcsteeme.<\/p>\n

Mimalloci peamine omadus on rakenduse kompaktsus (alla 3500 koodi rea) ja v\u00e4ga k\u00f5rge j\u00f5udlus. testides,<\/a><\/noindex> mimalloc \u00fcletas j\u00f5udluses k\u00f5ik konkurentsi m\u00e4luhaldusraamatukogud, sealhulgas jemalloc<\/a><\/noindex>, tcmalloc<\/a><\/noindex>, snmalloc<\/a><\/noindex>, rpmalloc<\/a><\/noindex> ja Hoard<\/a><\/noindex>. <\/p>\n

J\u00f5udluse hindamiseks kasutati olemasolevate standardsete testide<\/a><\/noindex> M\u00f5nedes testides \u00fcletas mimalloc teisi s\u00fcsteeme mitu korda, n\u00e4iteks objektide migreerimise testis erinevate l\u00f5imede vahel osutus mimalloc tcmallocist ja jemallocist \u00fcle 2,5 korra kiiremaks. Samuti on enamikus testides t\u00e4heldatud madalamat m\u00e4lutarbimist, m\u00f5nel juhul suudeti m\u00e4lukulu v\u00e4hendada 25%.<\/p>\n

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

K\u00f5rge j\u00f5udluse saavutamine p\u00f5hineb peamiselt vaba blokksarja (free list sharding) segmentatsiooni rakendamisel. Selle asemel, et kasutada \u00fchte suurt loendit, jagab mimalloc selle v\u00e4iksemateks loenditeks, millest iga\u00fcks on seotud m\u00e4lu lehega. Selline l\u00e4henemine v\u00e4hendab fragmenteerimist ja parandab andmete lokaliseerimist m\u00e4lus. M\u00e4lu leht on r\u00fchmitatud sarnastes suurustes blokki. 64-bitistes s\u00fcsteemides on lehe suurus tavaliselt 64 kB. Kui lehes ei j\u00e4\u00e4 enam kasutada mingeid blokke, vabastatakse see t\u00e4ielikult, tagastades m\u00e4lu operatsioonis\u00fcsteemile, mis aitab v\u00e4hendada m\u00e4lu kulu ja fragmenteerimist pikalt t\u00f6\u00f6tavates programmide puhul.<\/p>\n

Raamatukogu saab siduda sidumise etapis v\u00f5i laadida juba compileeritud programmi jaoks («LD_PRELOAD=\/usr\/bin\/libmimalloc.so myprogram»). Raamatukogus on samuti saadaval API<\/a><\/noindex> funktsionaalsuse integreerimiseks ajakasutuses ja peeneks k\u00e4itumise juhtimiseks, n\u00e4iteks viivitusega m\u00e4lu vabastamise t\u00f6\u00f6tlejate ja monotoniseeritud viidete loendite \u00fchendamiseks. Rakenduses on v\u00f5imalik luua ja kasutada mitmeid «hunnikuid» (heap) erinevates m\u00e4lu piirkondades. Samuti on v\u00f5imalik hunnik t\u00e4ielikult vabastada, ilma et peaksite eraldi vabastama seal asuvaid objekte.<\/p>\n

Pakutakse v\u00f5imalust teeki koguda turvare\u017eiimis, kus plokkide piiridel kasutatakse spetsiaalseid m\u00e4lukontrolli lehti (guard-page), samuti kasutatakse plokkide jaotamise randomiseerimist ja vabastatud plokkide loendite kr\u00fcptimist. Taolised meetmed v\u00f5imaldavad blokeerida enamik tavap\u00e4raseid tehnikaid, millega h\u00e4kkida k\u00fchvlite \u00fclet\u00e4itumist. Turvare\u017eiimi sissel\u00fclitamisel v\u00e4heneb j\u00f5udlus ligikaudu 3%.<\/p>\n

mimalloci omadustest tuleks m\u00e4rkida ka, et see ei ole vastuv\u00f5tlik suure fraktsioonimisega seotud probleeme. Halvimal juhul suureneb m\u00e4lu kasutamine 0,2% metainformatsiooni jaoks ja v\u00f5ib ulatuda 16,7%-ni d\u00fcnaamilisest m\u00e4lu jaotamisest. Ressursside juurdep\u00e4\u00e4su konfliktide v\u00e4listamiseks rakendatakse mimallocis ainult aatomoperatsioone.<\/p>\n

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

Allikas: 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-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\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\n","aioseo_head_json":{"title":"\ud83e\udd47Microsoft avas m\u00e4luhalduse s\u00fcsteemi mimalloci koodi | ProHoster","description":"Ettev\u00f5te Microsoft on avanud MIT litsentsi alusel mimalloci raamatukogu, mis sisaldab m\u00e4luhalduse s\u00fcsteemi rakendust, mis loodi algselt Koka ja Lean keelte runtime-komponentide jaoks. Mimalloc on kohandatud kasutamiseks t\u00fc\u00fcpilistes rakendustes ilma nende koodi muutmata ja v\u00f5ib toimida l\u00e4bipaistva asendajana malloc funktsioonile. Tugi \u00fchtlustatud t\u00f6\u00f6 jaoks Windowsis, macOS-is, Linuxis, BSD-s ja teistes Unix-laadsetes s\u00fcsteemides. mimalloci peamine omadus","canonical_url":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/misrosoft-otkryl-kod-sistemy-raspredeleniya-pamyati-mimalloc","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"et_EE","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 \u0434\u043b\u044f runtime-\u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043e\u0432 \u044f\u0437\u044b\u043a\u043e\u0432 Koka \u0438 Lean. 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