{"id":79056,"date":"2020-04-24T01:42:07","date_gmt":"2020-04-23T23:42:07","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/facebook-predlozhil-novyj-mehanizm-upravleniya-pamyatyu-slab-dlya-yadra-linux"},"modified":"2020-04-24T01:42:07","modified_gmt":"2020-04-23T23:42:07","slug":"facebook-predlozhil-novyj-mehanizm-upravleniya-pamyatyu-slab-dlya-yadra-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/news\/facebook-predlozhil-novyj-mehanizm-upravleniya-pamyatyu-slab-dlya-yadra-linux","title":{"rendered":"Facebook ofroi nj\u00eb mekaniz\u00ebm t\u00eb ri p\u00ebr menaxhimin e memories slab p\u00ebr b\u00ebrtham\u00ebn Linux","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Roman Gushchin (Roman Gushchin<\/a><\/noindex>) from Facebook publikoi<\/a><\/noindex> in the mailing list of Linux kernel developers a set of patches has been proposed for a new memory distribution controller slab<\/a><\/noindex> (slab memory controller). The new controller is notable for transferring the slab accounting from the page level to the kernel object level, allowing slab pages to be shared across cgroups, rather than allocating separate slab caches for each cgroup. <\/p>\n

The proposed approach allows for a more efficient use of slab, reducing the size of slab memory used by 30-45% and significantly lowering the total memory consumption by the kernel. By reducing the number of pinned slabs, there is also a positive effect on reducing memory fragmentation. The new memory controller greatly simplifies slab accounting code and does not require complicated dynamic algorithms for creating and deleting slab caches for each cgroup. All memory cgroups in the new implementation use a common set of slab caches, and the lifetime of the slab caches is no longer tied to the lifetime established through the cgroup kufizimeve<\/a><\/noindex> for memory usage.<\/p>\n

Pjesa e re e kontrolluesit slab ofron nj\u00eb ndjekje m\u00eb t\u00eb sakt\u00eb t\u00eb burimeve dhe teoretikisht duhet t\u00eb ngarkoj\u00eb m\u00eb shum\u00eb CPU, por n\u00eb praktik\u00eb dallimet rezultuan t\u00eb jen\u00eb t\u00eb par\u00ebnd\u00ebsishme. Konkretisht, kontrolluesi i ri slab \u00ebsht\u00eb p\u00ebrdorur p\u00ebr disa muaj n\u00eb serverat e pun\u00ebs t\u00eb Facebook, t\u00eb cil\u00ebt p\u00ebrpunojn\u00eb lloje t\u00eb ndryshme ngarkesash, dhe deri tani nuk jan\u00eb identifikuar regresione t\u00eb dukshme. P\u00ebr m\u00eb tep\u00ebr, \u00ebsht\u00eb v\u00ebrejtur nj\u00eb reduktim t\u00eb konsideruesh\u00ebm t\u00eb shpenzimeve t\u00eb memories \u2014 n\u00eb disa host-e arriti t\u00eb kursej\u00eb deri n\u00eb 1 GB memorie, por ky tregues varet shum\u00eb nga natyra e ngarkes\u00ebs, madh\u00ebsia totale e RAM-it, numri i CPU-ve dhe karakteristikat e pun\u00ebs me memorjen. Testet e kryera m\u00eb par\u00eb treguan<\/a><\/noindex> showed a memory consumption reduction of 650-700 MB (42% of slab memory) on the web frontend, 750-800 MB (35%) on a database cache server, and 700 MB (36%) on a DNS server.<\/p>\n

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

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

\u0420\u043e\u043c\u0430\u043d \u0413\u0443\u0449\u0438\u043d (Roman Gushchin) \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Facebook \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u0432 \u0441\u043f\u0438\u0441\u043a\u0435 \u0440\u0430\u0441\u0441\u044b\u043b\u043a\u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u044f\u0434\u0440\u0430 Linux \u043d\u0430\u0431\u043e\u0440 \u043f\u0430\u0442\u0447\u0435\u0439 \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u043d\u043e\u0432\u043e\u0433\u043e \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\u0430 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u043f\u0430\u043c\u044f\u0442\u0438 slab (slab memory controller). \u041d\u043e\u0432\u044b\u0439 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440 \u043f\u0440\u0438\u043c\u0435\u0447\u0430\u0442\u0435\u043b\u0435\u043d \u043f\u0435\u0440\u0435\u043d\u043e\u0441\u043e\u043c \u0443\u0447\u0451\u0442\u0430 slab \u0441 \u0443\u0440\u043e\u0432\u043d\u044f \u0441\u0442\u0440\u0430\u043d\u0438\u0446 \u043f\u0430\u043c\u044f\u0442\u0438 \u043d\u0430 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u0431\u044a\u0435\u043a\u0442\u043e\u0432 \u044f\u0434\u0440\u0430, \u0447\u0442\u043e \u0434\u0430\u0451\u0442 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c slab-\u0441\u0442\u0440\u0430\u043d\u0438\u0446\u044b \u0432 \u0440\u0430\u0437\u043d\u044b\u0445 cgroup, \u0432\u043c\u0435\u0441\u0442\u043e \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0445 \u043a\u044d\u0448\u0435\u0439 slab \u0434\u043b\u044f […]<\/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-79056","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\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\udd47 Facebook proposed a new slab memory management mechanism for the Linux kernel | ProHoster","description":"Roman Gushchin (Roman Gushchin) from 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