{"id":116505,"date":"2024-06-12T18:05:44","date_gmt":"2024-06-12T16:05:44","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-yadre-linux-poyavitsya-vozmozhnost-ispolzovaniya-ebpf-dlya-sozdaniya-planirovshhikov-zadach"},"modified":"2024-06-12T18:05:44","modified_gmt":"2024-06-12T16:05:44","slug":"v-yadre-linux-poyavitsya-vozmozhnost-ispolzovaniya-ebpf-dlya-sozdaniya-planirovshhikov-zadach","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/v-yadre-linux-poyavitsya-vozmozhnost-ispolzovaniya-ebpf-dlya-sozdaniya-planirovshhikov-zadach","title":{"rendered":"A Linux kernelben megjelenik az eBPF haszn\u00e1lat\u00e1nak lehet\u0151s\u00e9ge a feladat\u00fctemez\u0151k l\u00e9trehoz\u00e1s\u00e1ra.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Linus Torvalds kifejezte sz\u00e1nd\u00e9k\u00e1t, hogy a Linux 6.11 kernelbe fogadja a &#171;sched_ext&#187; (SCX) mechanizmusra vonatkoz\u00f3 jav\u00edt\u00e1sokat, amelyek lehet\u0151v\u00e9 teszik az eBPF haszn\u00e1lat\u00e1t CPU tervez\u0151k l\u00e9trehoz\u00e1s\u00e1hoz, amelyek szinte minden aspektus\u00e1t lefedik a feladatok v\u00e9grehajt\u00e1s\u00e1nak \u00e9s a CPU er\u0151forr\u00e1sok eloszt\u00e1s\u00e1nak. Ilyen tervez\u0151k dinamikusan bet\u00f6lthet\u0151k \u00e9s v\u00e9grehajthat\u00f3k a Linux kernelben egy eBPF virtu\u00e1lis g\u00e9pben, ahol a JIT-\u00f6ssze\u00e1ll\u00edt\u00e1s alkalmaz\u00e1s\u00e1nak k\u00f6sz\u00f6nhet\u0151en a b\u00e1jt k\u00f3dot g\u00e9pi utas\u00edt\u00e1sokk\u00e1 ford\u00edtj\u00e1k, \u00e9s a leford\u00edtott k\u00f3d teljes\u00edtm\u00e9ny\u00e9vel hajtj\u00e1k v\u00e9gre.<\/p>\n<p>A javasolt jav\u00edt\u00f3csomagok egy \u00faj \u00fctemez\u00e9si oszt\u00e1lyt, a SCHED_EXT-et vezetik be, amelynek priorit\u00e1s\u00e1t a kernel az SCHED_IDLE \u00e9s SCHED_NORMAL oszt\u00e1lyok k\u00f6z\u00f6tt \u00e1ll\u00edtja be, ez nem teszi lehet\u0151v\u00e9, hogy a SCHED_EXT-hez k\u00f6t\u00f6tt BPF-kezel\u0151k befoly\u00e1solj\u00e1k azokat a feladatokat, amelyek m\u00e1r a norm\u00e1l \u00fctemez\u0151h\u00f6z (SCHED_NORMAL) tartoznak, de lehet\u0151s\u00e9get ad egyes feladatok SCHED_EXT-hez t\u00f6rt\u00e9n\u0151 csatol\u00e1s\u00e1ra vagy az \u00f6sszes, val\u00f3s idej\u0171 \u00fczemeltet\u00e9s alatt \u00e1ll\u00f3 folyamat SCHED_EXT-hez val\u00f3 \u00e1thelyez\u00e9s\u00e9re. Ha a SCHED_EXT-hez nincsenek k\u00f6tve BPF-kezel\u0151k, akkor minden, a SCHED_EXT oszt\u00e1lyba \u00e1thelyezett folyamat a SCHED_NORMAL \u00fctemez\u0151 seg\u00edts\u00e9g\u00e9vel lesz kezelve. A BPF-kezel\u0151k m\u0171k\u00f6d\u00e9se a CPU-n v\u00e9grehajt\u00e1sra v\u00e1r\u00f3 feladatok sorainak elemz\u00e9s\u00e9re (egy glob\u00e1lis sor \u00e9s egy sor a CPU magonk\u00e9nt) \u00e9s annak a feladatnak a kiv\u00e1laszt\u00e1s\u00e1ra vonatkozik, amelynek CPU er\u0151forr\u00e1sokat kell biztos\u00edtani, amikor a megfelel\u0151 CPU mag felszabadul.<\/p>\n<p>A sched_ext mechanizmus egyszer\u0171s\u00edti a meghat\u00e1rozott feladatokra jellemz\u0151 \u00fctemez\u0151k l\u00e9trehoz\u00e1s\u00e1t, lehet\u0151s\u00e9get ad a k\u00fcl\u00f6nb\u00f6z\u0151 technik\u00e1k \u00e9s \u00fctemez\u00e9si strat\u00e9gi\u00e1k k\u00eds\u00e9rletez\u00e9s\u00e9re, valamint lehet\u0151v\u00e9 teszi a gyors munkamodellek l\u00e9trehoz\u00e1s\u00e1t \u00e9s az \u00fctemez\u0151k azonnali cser\u00e9j\u00e9t a m\u0171k\u00f6d\u0151 infrastrukt\u00far\u00e1kban. P\u00e9ld\u00e1ul a sched_ext seg\u00edts\u00e9g\u00e9vel l\u00e9trehozhat\u00f3 egy olyan \u00fctemez\u0151, amely figyelembe veszi egy bizonyos alkalmaz\u00e1s saj\u00e1toss\u00e1gait \u00e9s dinamikusan m\u00f3dos\u00edtja annak v\u00e9grehajt\u00e1s\u00e1nak \u00fctemez\u00e9si strat\u00e9gi\u00e1j\u00e1t a rendszer \u00e1llapota \u00e9s egy\u00e9b t\u00e9nyez\u0151k f\u00fcggv\u00e9ny\u00e9ben. <\/p>\n<p>Jelenleg k\u00f6r\u00fclbel\u00fcl tucatnyi \u00fctemez\u0151 fejl\u0151dik a sched_ext alapjain, amelyek feladat\u00fctemez\u00e9si logik\u00e1ja a felhaszn\u00e1l\u00f3i t\u00e9rben van meghat\u00e1rozva \u00e9s BPF-programok form\u00e1j\u00e1ban ker\u00fcl bet\u00f6lt\u00e9sre a kernelbe:<\/p>\n<ul>\n<li class=\"l\">  scx_layered &#8212; hibrid feladat\u00fctemez\u0151, amely a feladatokat r\u00e9tegekre osztja, mindegyikhez saj\u00e1t tervez\u00e9si strat\u00e9gi\u00e1t alkalmazva. P\u00e9ld\u00e1ul az scx_layered lehet\u0151v\u00e9 teszi bizonyos feladatok k\u00fcl\u00f6n r\u00e9tegbe val\u00f3 kiemel\u00e9s\u00e9t, amelyekhez garant\u00e1lt CPU er\u0151forr\u00e1sok biztos\u00edtottak, vagy egyes alkalmaz\u00e1sok priorit\u00e1s\u00e1nak n\u00f6vel\u00e9s\u00e9t. A tervez\u0151t a Meta fejleszti. A felhaszn\u00e1l\u00f3i t\u00e9rben m\u0171k\u00f6d\u0151 BPF gener\u00e1l\u00f3 logika Rust nyelven \u00edr\u00f3dott.\n<li class=\"l\"> scx_rustland &#8212; tervez\u0151, amely optimaliz\u00e1lva van az interakt\u00edv feladatok priorit\u00e1s\u00e1nak n\u00f6vel\u00e9s\u00e9re a CPU-t intenz\u00edven terhel\u0151 feladatok h\u00e1tter\u00e9ben. P\u00e9ld\u00e1ul a Terraria j\u00e1t\u00e9kelind\u00edt\u00e1si tesztj\u00e9ben, amikor a kernel \u00f6ssze\u00e1ll\u00edt\u00e1sa is folyamatban volt, az scx_rustland tervez\u0151 lehet\u0151v\u00e9 tette, hogy a j\u00e1t\u00e9kban magasabb FPS-t \u00e9rj\u00fcnk el, mint az alap\u00e9rtelmezett EEVDF tervez\u0151 haszn\u00e1latakor. A projekt a Canonical munkat\u00e1rs\u00e1nak fejleszt\u00e9se. A felhaszn\u00e1l\u00f3i t\u00e9rben m\u0171k\u00f6d\u0151 BPF gener\u00e1l\u00f3 logika Rust nyelven \u00edr\u00f3dott.\n<li class=\"l\"> scx_lavd &#8212; a LAVD (Latency-criticality Aware Virtual Deadline) feladat\u00fctemez\u00e9si algoritmus megval\u00f3s\u00edt\u00e1sa, amely figyelembe veszi a k\u00e9s\u00e9sek cs\u00f6kkent\u00e9s\u00e9nek fontoss\u00e1g\u00e1t egyes feladatok sz\u00e1m\u00e1ra, \u00e9s a CPU er\u0151forr\u00e1sok eloszt\u00e1s\u00e1r\u00f3l val\u00f3 d\u00f6nt\u00e9s sor\u00e1n figyelembe veszi a folyamatok v\u00e9grehajt\u00e1s\u00e1nak el\u0151rehalad\u00e1s\u00e1t. A tervez\u0151t az Igalia \u00e9s a Valve c\u00e9gek fejlesztik, hogy cs\u00f6kkents\u00e9k a k\u00e9s\u00e9seket sz\u00e1m\u00edt\u00f3g\u00e9pes j\u00e1t\u00e9kokban \u00e9s interakt\u00edv feladatokban. A felhaszn\u00e1l\u00f3i t\u00e9rben m\u0171k\u00f6d\u0151 BPF gener\u00e1l\u00f3 logika Rust nyelven \u00edr\u00f3dott.\n<li class=\"l\"> scx_rusty, scx_rlfifo, scx_mitosis &#8212; a Rust nyelven \u00edr\u00f3dott felhaszn\u00e1l\u00f3i t\u00e9rbeni komponensekkel rendelkez\u0151 tervez\u0151k p\u00e9ld\u00e1i, amelyek a feladatcsoportok k\u00f6z\u00f6tti terhel\u00e9s alapj\u00e1n v\u00e9gzik a kiegyens\u00falyoz\u00e1st, egy egyszer\u0171 FIFO tervez\u0151t \u00e9s egy tervez\u0151t a feladatcsoportok CPU magokra val\u00f3 k\u00f6t\u00e9s\u00e9re.\n<li class=\"l\"> scx_central, scx_flatcg, scx_nest, scx_pair, scx_qmap, scx_simple, scx_userland \u2014 p\u00e9ld\u00e1k a felhaszn\u00e1l\u00f3i t\u00e9rbeli komponensek C nyelvben \u00edrt \u00fctemez\u0151ire, amelyek a sched-ext k\u00fcl\u00f6nb\u00f6z\u0151 lehet\u0151s\u00e9geit illusztr\u00e1lj\u00e1k.\n<\/ul>\n<p>A sched_ext mechanizmust 2022-ben ker\u00fclt kezdem\u00e9nyez\u00e9sre a Linux kernel fejleszt\u0151i \u00e1ltal, ezt k\u00f6vet\u0151en hat patch verzi\u00f3t tettek k\u00f6zz\u00e9. B\u00e1r a kernel alapverzi\u00f3j\u00e1ban nincs t\u00e1mogat\u00e1s, az Ubuntu, Arch Linux, Fedora \u00e9s NixOS disztrib\u00faci\u00f3k sz\u00e1m\u00e1ra el\u00e9rhet\u0151 a sched_ext telep\u00edt\u00e9se kieg\u00e9sz\u00edt\u0151 csomagokon kereszt\u00fcl. A Canonical fontol\u00f3ra veszi a sched-ext komponensek be\u00e9p\u00edt\u00e9s\u00e9t az Ubuntu 24.10-be, m\u00edg a Valve a sched_ext Steam Deck-be val\u00f3 integr\u00e1l\u00e1s\u00e1n dolgozik. A Meta m\u00e1r alkalmazza a sched_ext alap\u00fa \u00fctemez\u0151t a munkainfrastrukt\u00far\u00e1j\u00e1ban. <\/p>\n<p>A Google saj\u00e1t ghOSt keretrendszer\u00e9nek haszn\u00e1lat\u00e1val k\u00eds\u00e9rletezik, amely lehet\u0151v\u00e9 teszi az \u00fctemez\u0151 d\u00f6nt\u00e9seinek befoly\u00e1sol\u00e1s\u00e1t BPF programok seg\u00edts\u00e9g\u00e9vel. Jelenleg a ghOSt sched_ext-re val\u00f3 portol\u00e1s\u00e1n dolgoznak. A Google emellett a sched_ext ChromeOS verzi\u00f3j\u00e1t is fejleszti, azt tervezve, hogy ezt a hibrid \u00fctemez\u0151 scx_layered aktiv\u00e1l\u00e1s\u00e1hoz haszn\u00e1lja, cs\u00f6kkentve ezzel a k\u00e9sleltet\u00e9seket an\u00e9lk\u00fcl, hogy kiterjeszt\u00e9seket kellene haszn\u00e1lniuk a val\u00f3s idej\u0171 m\u0171k\u00f6d\u00e9shez. Az Oculus a sched_ext Androidra val\u00f3 portol\u00e1s\u00e1n dolgozik.<br \/>\n<br \/>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=61354\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041b\u0438\u043d\u0443\u0441 \u0422\u043e\u0440\u0432\u0430\u043b\u044c\u0434\u0441 \u0432\u044b\u0440\u0430\u0437\u0438\u043b \u0433\u043e\u0442\u043e\u0432\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u0438\u043d\u044f\u0442\u044c \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 \u044f\u0434\u0440\u0430 Linux 6.11, \u0440\u0435\u043b\u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u043e\u0436\u0438\u0434\u0430\u0435\u0442\u0441\u044f \u0432 \u043a\u043e\u043d\u0446\u0435 \u0441\u0435\u043d\u0442\u044f\u0431\u0440\u044f, \u043f\u0430\u0442\u0447\u0435\u0439 \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 &#171;sched_ext&#187; (SCX), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c eBPF \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u043f\u043b\u0430\u043d\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u043e\u0432 CPU, \u043e\u0445\u0432\u0430\u0442\u044b\u0432\u0430\u044e\u0449\u0438\u0445 \u043f\u0440\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u0432\u0441\u0435 \u0430\u0441\u043f\u0435\u043a\u0442\u044b \u043f\u043b\u0430\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0437\u0430\u0434\u0430\u0447 \u0438 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u0440\u0435\u0441\u0443\u0440\u0441\u043e\u0432 CPU. \u041f\u043e\u0434\u043e\u0431\u043d\u044b\u0435 \u043f\u043b\u0430\u043d\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0438 \u043c\u043e\u0433\u0443\u0442 \u0437\u0430\u0433\u0440\u0443\u0436\u0430\u0442\u044c\u0441\u044f \u0434\u0438\u043d\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u0438 \u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0442\u044c\u0441\u044f \u0432\u043d\u0443\u0442\u0440\u0438 \u044f\u0434\u0440\u0430 Linux \u0432 \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0439 \u043c\u0430\u0448\u0438\u043d\u0435 eBPF, \u0432 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-116505","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041b\u0438\u043d\u0443\u0441 \u0422\u043e\u0440\u0432\u0430\u043b\u044c\u0434\u0441 \u0432\u044b\u0440\u0430\u0437\u0438\u043b \u0433\u043e\u0442\u043e\u0432\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u0438\u043d\u044f\u0442\u044c \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 \u044f\u0434\u0440\u0430 Linux 6.11, \u0440\u0435\u043b\u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u043e\u0436\u0438\u0434\u0430\u0435\u0442\u0441\u044f \u0432 \u043a\u043e\u043d\u0446\u0435 \u0441\u0435\u043d\u0442\u044f\u0431\u0440\u044f, \u043f\u0430\u0442\u0447\u0435\u0439 \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 &quot;sched_ext&quot; 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