{"id":112509,"date":"2023-12-26T15:10:22","date_gmt":"2023-12-26T13:10:22","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dlya-python-predlozhen-jit-kompilyator-ispolzuyushhij-tehniku-copy-and-patch"},"modified":"2023-12-26T15:10:22","modified_gmt":"2023-12-26T13:10:22","slug":"dlya-python-predlozhen-jit-kompilyator-ispolzuyushhij-tehniku-copy-and-patch","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/dlya-python-predlozhen-jit-kompilyator-ispolzuyushhij-tehniku-copy-and-patch","title":{"rendered":"A Pythonhoz egy JIT ford\u00edt\u00f3 ker\u00fclt javaslatra, amely a copy-and-patch technik\u00e1t haszn\u00e1lja.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>A Microsoft k\u00e9pvisel\u0151je, Brandt Bucher, aki a CPython f\u0151 fejleszt\u0151i k\u00f6z\u00e9 tartozik, \u00e9s a CPython \u00e9rtelmez\u0151 teljes\u00edtm\u00e9ny\u00e9nek jav\u00edt\u00e1s\u00e1ra f\u00f3kusz\u00e1l\u00f3 csapatban dolgozik, k\u00f6zz\u00e9tett egy JIT-compiler implement\u00e1ci\u00f3t a Python sz\u00e1m\u00e1ra, amely a Copy-and-Patch technik\u00e1t haszn\u00e1lja. A JIT k\u00f6zz\u00e9t\u00e9tel\u00e9t kar\u00e1csonyhoz id\u0151z\u00edtett\u00e9k, \u00e9s a bejelent\u00e9s verses form\u00e1ban k\u00e9sz\u00fclt el.     <\/p>\n<p>A javasolt JIT kiemelkedik a rendk\u00edv\u00fcl magas k\u00f3dgener\u00e1l\u00e1si sebess\u00e9g\u00e9vel, a karbantart\u00e1s egyszer\u0171s\u00e9g\u00e9vel \u00e9s a teljes integr\u00e1ci\u00f3j\u00e1val az \u00e9rtelmez\u0151vel. A javasolt m\u00f3dszer lehet\u0151v\u00e9 teszi, hogy a C nyelven \u00edrt \u00e9rtelmez\u0151t automatikusan JIT-compilerre alak\u00edtsuk \u00e1t, an\u00e9lk\u00fcl, hogy k\u00fcl\u00f6n k\u00f3dgener\u00e1l\u00f3 logik\u00e1t kellene kialak\u00edtani, vagy manu\u00e1lisan kellene assemblerszint\u0171 megval\u00f3s\u00edt\u00e1sokat l\u00e9trehozni. E megk\u00f6zel\u00edt\u00e9s k\u00f6vetkezt\u00e9ben hibaelh\u00e1r\u00edt\u00e1s az \u00e9rtelmez\u0151ben automatikusan megsz\u00fcnteti a probl\u00e9m\u00e1t a JIT-ben is, mivel k\u00f6z\u00f6s k\u00f3dgener\u00e1tort haszn\u00e1lnak.    <\/p>\n<p>A Copy-and-Patch m\u00f3dszer l\u00e9nyege abban rejlik, hogy a k\u00f3d \u00fajrahordoz\u00e1sa a mem\u00f3ri\u00e1ban az objektumf\u00e1jlok bet\u00f6lt\u00e9sekor \u00e9s a g\u00e9pi utas\u00edt\u00e1sok behelyettes\u00edt\u00e9se a b\u00e1jtcode-ba a JIT-ben hasonl\u00f3 feladatok. A JIT m\u0171k\u00f6d\u00e9s sor\u00e1n, a program v\u00e9grehajt\u00e1sa k\u00f6zben, a k\u00e9sz\u00edtett \u00e9rtelmez\u0151 \u00e1ltal gener\u00e1lt b\u00e1jtcode utas\u00edt\u00e1sokat vizsg\u00e1lja, \u00e9s minden egyes utas\u00edt\u00e1s sz\u00e1m\u00e1ra \u00e1tkonvert\u00e1lt g\u00e9pi k\u00f3dot m\u00e1sol a v\u00e9grehajthat\u00f3 k\u00f3d mem\u00f3riater\u00fclet\u00e9re, valamint fut\u00e1s k\u00f6zben m\u00f3dos\u00edtja az utas\u00edt\u00e1sokat, hogy az \u00e9ppen feldolgozott adatokat helyettes\u00edtse benn\u00fck (a JIT k\u00e9szen \u00e1ll\u00f3, m\u00e1r leford\u00edtott f\u00fcggv\u00e9nyek sablonjait m\u00e1solja, \u00e9s beilleszti a sz\u00fcks\u00e9ges \u00e9rt\u00e9keket, mint p\u00e9ld\u00e1ul argumentumokat \u00e9s konstansokat). Az objektumf\u00e1jlok bet\u00f6lt\u00e9se sor\u00e1n szint\u00e9n g\u00e9pi k\u00f3d m\u00e1sol\u00e1s t\u00f6rt\u00e9nik a mem\u00f3ri\u00e1ba, \u00e9s k\u00fcls\u0151 szimb\u00f3lumok behelyettes\u00edt\u00e9se.    <\/p>\n<p>A Copy-and-Patch JIT seg\u00edts\u00e9g\u00e9vel az LLVM haszn\u00e1lat\u00e1val ELF form\u00e1tum\u00fa objektumf\u00e1jlt \u00e1ll\u00edtanak el\u0151, amely tartalmazza a b\u00e1jtcode utas\u00edt\u00e1sait \u00e9s az adatcser\u00e9re vonatkoz\u00f3 inform\u00e1ci\u00f3kat. A JIT a program fut\u00e1sa sor\u00e1n az interpret\u00e1lt programban gener\u00e1lt b\u00e1jtcode utas\u00edt\u00e1sokat a g\u00e9pi k\u00f3d megfelel\u0151 k\u00e9pvisel\u0151ire cser\u00e9li, mik\u00f6zben behelyettes\u00edti a sz\u00e1m\u00edt\u00e1sokhoz sz\u00fcks\u00e9ges adatokat. A JIT implement\u00e1l\u00e1s\u00e1hoz az LLVM modulra van sz\u00fcks\u00e9g a ford\u00edt\u00e1si f\u00e1zisban, de a fut\u00e1si komponensek nem k\u00f6t\u0151dnek k\u00fcls\u0151 f\u00fcgg\u0151s\u00e9gekhez, \u00e9s k\u00f6r\u00fclbel\u00fcl 300 manu\u00e1lisan \u00edrt C nyelv\u0171 sorb\u00f3l \u00e9s 3000 gener\u00e1lt C k\u00f3dsorb\u00f3l \u00e1llnak.        <\/p>\n<p>A hagyom\u00e1nyos JIT-eszk\u00f6z\u00f6kh\u00f6z (LLVM -O0) k\u00e9pest a javasolt JIT 100-szor gyorsabb k\u00f3dgener\u00e1l\u00e1st \u00e9s 15%-kal gyorsabb eredm\u00e9nyk\u00f3dot biztos\u00edt. Az WebAssembly-be val\u00f3 ford\u00edt\u00e1ssal (Liftoff) \u00f6sszehasonl\u00edtva az \u00faj JIT 5-sz\u00f6r gyorsabban gener\u00e1l k\u00f3dot, a kapott k\u00f3d pedig 50%-kal gyorsabban fut. Ha az \u00faj JIT-et \u00f6sszehasonl\u00edtjuk az optimaliz\u00e1l\u00f3 JIT-tel (LuaJIT), amely manu\u00e1lisan \u00edrt assemblerk\u00f3dot haszn\u00e1l, akkor a javasolt megold\u00e1s 44 teszt k\u00f6z\u00fcl 13-ban gyorsabb volt, m\u00edg \u00e1tlagosan 35%-kal lassabb volt, mindezt jelent\u0151s karbantart\u00e1si egyszer\u0171s\u00edt\u00e9ssel \u00e9s a megval\u00f3s\u00edt\u00e1si komplexit\u00e1s cs\u00f6kkent\u00e9s\u00e9vel elvesz\u00edtve.            <center>  <div class=\"youtube-placeholder\" data-id=\"HxSHIpEQRjs\" onclick=\"loadVideo(this)\">\r\n        <img decoding=\"async\" src=\"https:\/\/img.youtube.com\/vi\/HxSHIpEQRjs\/hqdefault.jpg\" alt=\"Vide\u00f3 lej\u00e1tsz\u00e1sa\" loading=\"lazy\" width=\"480\" height=\"360\" style=\"width:100%;height:auto;\">\r\n        <div class=\"play-button\"><\/div>\r\n    <\/div><\/center><br \/>\n<br \/>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=60352\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0411\u0440\u0430\u043d\u0434\u0442 \u0411\u0443\u043a\u0435\u0440 (Brandt Bucher) \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Microsoft, \u0432\u0445\u043e\u0434\u044f\u0449\u0438\u0439 \u0432 \u0447\u0438\u0441\u043b\u043e core-\u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 CPython \u0438 \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0438\u0439 \u043a\u043e\u043c\u0430\u043d\u0434\u0435, \u0437\u0430\u043d\u0438\u043c\u0430\u044e\u0449\u0435\u0439\u0441\u044f \u0443\u0432\u0435\u043b\u0438\u0447\u0435\u043d\u0438\u0435\u043c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0438\u043d\u0442\u0435\u0440\u043f\u0440\u0435\u0442\u0430\u0442\u043e\u0440\u0430 CPython, \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e JIT-\u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440\u0430 \u0434\u043b\u044f Python, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0443\u044e \u0442\u0435\u0445\u043d\u0438\u043a\u0443 Copy-and-Patch. \u041f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u044f JIT \u043f\u0440\u0438\u0443\u0440\u043e\u0447\u0435\u043d\u0430 \u043a \u0420\u043e\u0436\u0434\u0435\u0441\u0442\u0432\u0443 \u0438 \u0430\u043d\u043e\u043d\u0441 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u0432 \u0441\u0442\u0438\u0445\u0430\u0445. \u041f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u044b\u0439 JIT \u043f\u0440\u0438\u043c\u0435\u0447\u0430\u0442\u0435\u043b\u0435\u043d \u043e\u0447\u0435\u043d\u044c \u0432\u044b\u0441\u043e\u043a\u043e\u0439 \u0441\u043a\u043e\u0440\u043e\u0441\u0442\u044c\u044e \u0433\u0435\u043d\u0435\u0440\u0430\u0446\u0438\u0438 \u043a\u043e\u0434\u0430, \u043f\u0440\u043e\u0441\u0442\u043e\u0442\u043e\u0439 \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u0438 \u043f\u043e\u043b\u043d\u043e\u0439 \u0438\u043d\u0442\u0435\u0433\u0440\u0430\u0446\u0438\u0435\u0439 \u0441 \u0438\u043d\u0442\u0435\u0440\u043f\u0440\u0435\u0442\u0430\u0442\u043e\u0440\u043e\u043c. \u041f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u044b\u0439 \u043c\u0435\u0442\u043e\u0434 [&hellip;]<\/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-112509","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 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