{"id":74338,"date":"2020-03-16T20:42:15","date_gmt":"2020-03-16T17:42:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-yadre-linux-5-7-budut-uskoreny-slozhnye-sopostavleniya-po-spiskam-v-netfilter"},"modified":"2020-03-16T20:42:15","modified_gmt":"2020-03-16T17:42:15","slug":"v-yadre-linux-5-7-budut-uskoreny-slozhnye-sopostavleniya-po-spiskam-v-netfilter","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/v-yadre-linux-5-7-budut-uskoreny-slozhnye-sopostavleniya-po-spiskam-v-netfilter","title":{"rendered":"V j\u00e1d\u0159e Linux 5.7 budou zrychleny slo\u017eit\u00e9 shody podle seznam\u016f v NetFilter","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V\u00fdvoj\u00e1\u0159i subsyst\u00e9mu filtrov\u00e1n\u00ed a modifikace s\u00ed\u0165ov\u00fdch paket\u016f Netfilter publikovali<\/a><\/noindex> sada patch\u016f, kter\u00e1 v\u00fdrazn\u011b zrychluje zpracov\u00e1n\u00ed velk\u00fdch seznam\u016f shod (nftables set), kde je pot\u0159eba kontrola kombinace pods\u00edt\u00ed, s\u00ed\u0165ov\u00fdch port\u016f, protokolu a MAC adres. Patche byly ji\u017e p\u0159ijaty do v\u011btve nf-next<\/a><\/noindex>, kter\u00e1 bude navr\u017eena k za\u0159azen\u00ed do j\u00e1dra Linuxu 5.7. Nejv\u00fdznamn\u011bj\u0161\u00edho zrychlen\u00ed bylo dosa\u017eeno d\u00edky vyu\u017eit\u00ed<\/a><\/noindex> instrukc\u00ed AVX2 (v budoucnu se pl\u00e1nuje publikovat podobn\u00e9 optimalizace zalo\u017een\u00e9 na instrukc\u00edch NEON pro ARM).<\/p>\n

Optimalizace byly zahrnuty do modulu nft_set_pipapo<\/a><\/noindex> (PIle PAcket POlicies), kter\u00fd se zab\u00fdv\u00e1 \u00falohou porovn\u00e1v\u00e1n\u00ed obsahu paketu s aplikovan\u00fdmi v pravidlech filtrov\u00e1n\u00ed libovoln\u00fdmi rozsahy stavov\u00fdch pol\u00ed, jako jsou rozsahy IP a s\u00ed\u0165ov\u00fdch port\u016f (nft_set_rbtree a nft_set_hash manipuluj\u00ed s porovn\u00e1v\u00e1n\u00edm interval\u016f a p\u0159\u00edm\u00fdm odra\u017een\u00edm hodnot). Vektorizovan\u00e1 pomoc\u00ed 256bitov\u00fdch instrukc\u00ed AVX2 verze pipapo na syst\u00e9mu s procesorem AMD Epyc 7402 vyk\u00e1zala n\u00e1r\u016fst v\u00fdkonu o 420 % p\u0159i anal\u00fdze 30 000 z\u00e1znam\u016f, zahrnuj\u00edc\u00edch p\u00e1ry port-protokol. N\u00e1r\u016fst p\u0159i porovn\u00e1v\u00e1n\u00ed p\u00e1ru ze pods\u00edt\u011b a \u010d\u00edsla portu p\u0159i anal\u00fdze 1000 z\u00e1znam\u016f \u010dinil 87 % pro IPv4 a 128 % pro IPv6.
\n

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

Dal\u0161\u00ed optimalizace, kter\u00e1 umo\u017e\u0148uje pou\u017eit\u00ed 8bitov\u00fdch skupin shody nam\u00edsto 4bitov\u00fdch, tak\u00e9 prok\u00e1zala v\u00fdrazn\u00fd n\u00e1r\u016fst v\u00fdkonu: 66 % p\u0159i anal\u00fdze 30 tis\u00edc z\u00e1znam\u016f port-protokol, 43 % \u2014 pods\u00ed\u0165_IPv4-port a 61 % \u2014 pods\u00ed\u0165_IPv6-port. Celkov\u011b, zohled\u0148uj\u00edc optimalizace AVX2, vzrostl v\u00fdkon pipapo v uveden\u00fdch testech o 766 %, 168 % a 269 % p\u0159\u00edslu\u0161n\u011b. V\u00fdsledn\u00e9 vlastnosti pro slo\u017eit\u00e9 shody p\u0159ekon\u00e1vaj\u00ed kontroly jednotliv\u00fdch pol\u00ed v rbtree<\/a><\/noindex> (s v\u00fdjimkou testu p\u00e1ru port+protokol), ale zat\u00edm zaost\u00e1vaj\u00ed za p\u0159\u00edm\u00fdmi kontrolami pomoc\u00ed hash\u016f<\/a><\/noindex> a drop-zpracovatel\u016f zalo\u017een\u00fdch na netdev.<\/p>\n

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

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

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

\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0444\u0438\u043b\u044c\u0442\u0440\u0430\u0446\u0438\u0438 \u0438 \u043c\u043e\u0434\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u043f\u0430\u043a\u0435\u0442\u043e\u0432 Netfilter \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0438 \u043d\u0430\u0431\u043e\u0440 \u043f\u0430\u0442\u0447\u0435\u0439, \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u0443\u0441\u043a\u043e\u0440\u044f\u044e\u0449\u0438\u0445 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0443 \u0431\u043e\u043b\u044c\u0448\u0438\u0445 \u0441\u043f\u0438\u0441\u043a\u043e\u0432 \u0441\u043e\u043f\u043e\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u044f (nftables set), \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0442\u0440\u0435\u0431\u0443\u0435\u0442\u0441\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0430 \u0441\u043e\u0447\u0435\u0442\u0430\u043d\u0438\u044f \u043f\u043e\u0434\u0441\u0435\u0442\u0435\u0439, \u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u043f\u043e\u0440\u0442\u043e\u0432, \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 \u0438 MAC-\u0430\u0434\u0440\u0435\u0441\u043e\u0432. \u041f\u0430\u0442\u0447\u0438 \u0443\u0436\u0435 \u043f\u0440\u0438\u043d\u044f\u0442\u044b \u0432 \u0432\u0435\u0442\u043a\u0443 nf-next, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0431\u0443\u0434\u0435\u0442 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u0430 \u0434\u043b\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 \u044f\u0434\u0440\u0430 Linux 5.7. \u041d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u0437\u0430\u043c\u0435\u0442\u043d\u043e\u0433\u043e \u0443\u0441\u043a\u043e\u0440\u0435\u043d\u0438\u044f \u0443\u0434\u0430\u043b\u043e\u0441\u044c \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0431\u043b\u0430\u0433\u043e\u0434\u0430\u0440\u044f \u0437\u0430\u0434\u0435\u0439\u0441\u0442\u0432\u043e\u0432\u0430\u043d\u0438\u044e \u0438\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u0439 AVX2 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":74339,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-74338","post","type-post","status-publish","format-standard","has-post-thumbnail","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\udd47V j\u00e1d\u0159e Linuxu 5.7 budou zrychlena slo\u017eit\u00e1 porovn\u00e1n\u00ed podle seznam\u016f v NetFilter | 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