Ingo Molnar, a well-known Linux kernel developer and author of the Completely Fair Scheduler (CFS), proposed a series of patches for discussion on the Linux kernel developers' mailing list. These patches affect more than half of all files in the kernel source code and provide a speed increase of 50-80% for complete kernel rebuilds, depending on the configurations. The implemented optimization is remarkable as it includes the largest set of changes in the history of kernel development\u20142,297 patches affecting over 25,000 files (10,000 header files in the 'include\/' and 'arch\/*\/include\/' directories and 15,000 source files). <\/p>\n
A teljes\u00edtm\u00e9nyn\u00f6veked\u00e9s a fejl\u00e9ces f\u00e1jlok feldolgoz\u00e1si m\u00f3dszer\u00e9nek megv\u00e1ltoztat\u00e1s\u00e1val \u00e9rhet\u0151 el. Megjegyzik, hogy a kernel fejleszt\u00e9se sor\u00e1n harminc \u00e9v alatt a fejl\u00e9ces f\u00e1jlok \u00e1llapota sz\u00e1mos keresztf\u00fcgg\u0151s\u00e9g miatt aggaszt\u00f3v\u00e1 v\u00e1lt. A fejl\u00e9cek \u00e1talak\u00edt\u00e1s\u00e1n v\u00e9gzett munka t\u00f6bb mint egy \u00e9vet vett ig\u00e9nybe, \u00e9s jelent\u0151s \u00e1tdolgoz\u00e1st ig\u00e9nyelt a hierarchi\u00e1k \u00e9s a f\u00fcgg\u0151s\u00e9gek ter\u00e9n. Az \u00e1talak\u00edt\u00e1s sor\u00e1n a t\u00edpusok \u00e9s API-k defini\u00e1l\u00e1sainak sz\u00e9tv\u00e1laszt\u00e1s\u00e1n is dolgoztak a kernel k\u00fcl\u00f6nb\u00f6z\u0151 alrendszerei sz\u00e1m\u00e1ra. <\/p>\n
Among the changes made are: the separation of high-level header files from one another, excluding inline function linking header files, distinguishing header files for types and APIs, ensuring the isolated build of header files (about 80 files contained obstructive indirect dependencies set through other header files), the automatic addition of dependencies to '.h' and '.c' files, step-by-step optimization of header files, the use of 'CONFIG_KALLSYMS_FAST=y' mode, and selective consolidation of C files into build blocks to reduce the number of object files. <\/p>\n
As a result, the work carried out allowed for a reduction in the size of header files processed at the post-preprocessing stage by 1-2 orders of magnitude. For example, before optimization, using the header file 'linux\/gfp.h' added 13,543 lines of code and brought in 303 dependent header files, but after optimization, the size was reduced to 181 lines and 26 dependent files. Another example: preprocessing the 'kernel\/pid.c' file without the patch involves 94,000 lines of code, most of which are not used in pid.c. The separation of header files enabled a threefold reduction in the amount of code processed, cutting the number of processed lines down to 36,000. <\/p>\n
A teljes kernel \u00e1t\u00e9p\u00edt\u00e9se a «make -j96 vmlinux» parancs haszn\u00e1lat\u00e1val a teszt rendszerben a foltok alkalmaz\u00e1s\u00e1val cs\u00f6kkentette a v5.16-rc7 \u00e1g \u00e9p\u00edt\u00e9si idej\u00e9t 231,34 m\u00e1sodpercr\u0151l 129,97 m\u00e1sodpercre (15,5-t\u0151l 27,7 \u00e9p\u00edt\u00e9s\/\u00f3ra), \u00e9s jav\u00edtotta a CPU magok kihaszn\u00e1lts\u00e1g\u00e1t az \u00e9p\u00edt\u00e9s sor\u00e1n. Az inkrement\u00e1lis \u00e9p\u00edt\u00e9sn\u00e9l az optimaliz\u00e1l\u00e1s hat\u00e1sa m\u00e9g szembet\u0171n\u0151bb \u2013 a kernel \u00fajra\u00e9p\u00edt\u00e9si ideje a fejl\u00e9c f\u00e1jlok m\u00f3dos\u00edt\u00e1sa ut\u00e1n t\u00f6bbsz\u00f6r\u00f6s\u00e9re cs\u00f6kkent (112%-t\u00f3l 173%-ig a m\u00f3dos\u00edtott fejl\u00e9c f\u00e1jlt\u00f3l f\u00fcgg\u0151en). Az optimaliz\u00e1l\u00e1sok egyel\u0151re csak az ARM64, MIPS, Sparc \u00e9s x86 (32- \u00e9s 64-bites) architekt\u00far\u00e1k sz\u00e1m\u00e1ra \u00e9rhet\u0151k el. \u0418\u043d\u0433\u043e \u041c\u043e\u043b\u043d\u0430\u0440 (Ingo Molnar), \u0438\u0437\u0432\u0435\u0441\u0442\u043d\u044b\u0439 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a Linux \u044f\u0434\u0440\u0430 \u0438 \u0430\u0432\u0442\u043e\u0440 \u043f\u043b\u0430\u043d\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0430 \u0437\u0430\u0434\u0430\u0447 CFS (Completely Fair Scheduler), \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u043b \u0434\u043b\u044f \u043e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u044f \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 \u0441\u0435\u0440\u0438\u044e \u043f\u0430\u0442\u0447\u0435\u0439, \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u044e\u0449\u0438\u0445 \u0431\u043e\u043b\u0435\u0435 \u043f\u043e\u043b\u043e\u0432\u0438\u043d\u044b \u0432\u0441\u0435\u0445 \u0444\u0430\u0439\u043b\u043e\u0432 \u0432 \u0438\u0441\u0445\u043e\u0434\u043d\u044b\u0445 \u0442\u0435\u043a\u0441\u0442\u0430\u0445 \u044f\u0434\u0440\u0430 \u0438 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u044e\u0449\u0438\u0445 \u0443\u0432\u0435\u043b\u0438\u0447\u0435\u043d\u0438\u0435 \u0441\u043a\u043e\u0440\u043e\u0441\u0442\u0438 \u043f\u043e\u043b\u043d\u043e\u0439 \u043f\u0435\u0440\u0435\u0441\u0431\u043e\u0440\u043a\u0438 \u044f\u0434\u0440\u0430 \u043d\u0430 50-80% \u0432 \u0437\u0430\u0432\u0438\u0441\u0438\u043c\u043e\u0441\u0442\u0438 \u043e\u0442 \u043d\u0430\u0441\u0442\u0440\u043e\u0435\u043a. \u0420\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u0430\u044f \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u044f \u043f\u0440\u0438\u043c\u0435\u0447\u0430\u0442\u0435\u043b\u044c\u043d\u0430 \u0442\u0435\u043c, \u0447\u0442\u043e \u043e\u043d\u0430 […]<\/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-102845","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\udd47Megjelent a Linux kernel buildel\u00e9s\u00e9t 50-80%-kal felgyors\u00edt\u00f3 jav\u00edt\u00e1ssorozat | ProHoster","description":"Ingo Molnar, a Linux kernel neves fejleszt\u0151je \u00e9s a Completely Fair Scheduler (CFS) \u00fctemez\u0151 szerz\u0151je, sorozat jav\u00edt\u00e1st 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Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"