{"id":121307,"date":"2025-01-11T09:46:03","date_gmt":"2025-01-11T07:46:03","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-fedora-42-planiruyut-postavlyat-optimizirovannye-varianty-ispolnyaemyh-fajlov"},"modified":"2025-01-11T09:46:03","modified_gmt":"2025-01-11T07:46:03","slug":"v-fedora-42-planiruyut-postavlyat-optimizirovannye-varianty-ispolnyaemyh-fajlov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/v-fedora-42-planiruyut-postavlyat-optimizirovannye-varianty-ispolnyaemyh-fajlov","title":{"rendered":"In Fedora 42 si prevede di fornire versioni ottimizzate dei file eseguibili","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Nell'uscita di Fedora 42, prevista per la fine di aprile, \u00e8 stato proposto di consentire agli sviluppatori di includere nei pacchetti ulteriori varianti di file eseguibili, compilati con ottimizzazioni per le microarchitetture x86-64-v2, x86-64-v3 e x86-64-v4. Si sottolinea che Fedora continuer\u00e0 a compilare pacchetti per l'architettura x86-64-v1, mentre CentOS utilizza per la compilazione l'architettura x86-64-v2, e RHEL 10 - x86-64-v3. Nella maggior parte dei casi, il guadagno di prestazioni per la compilazione su queste architetture non supera il 10%, ma in alcune situazioni pu\u00f2 portare a un notevole aumento delle prestazioni (fino al 120%). La proposta non \u00e8 ancora stata approvata dal comitato FESCo (Fedora Engineering Steering Committee), responsabile della parte tecnica dello sviluppo della distribuzione Fedora.    <\/p>\n<p>In Fedora \u00e8 gi\u00e0 consentita la fornitura di librerie aggiuntive, ottimizzate per le versioni avanzate dell'architettura x86_64, e questa possibilit\u00e0 si prevede di estendere ora ai file eseguibili. Il caricamento delle implementazioni ottimizzate delle librerie avviene tramite il linker dinamico (dynamic linker), che verifica la presenza di versioni aggiuntive nelle sotto-cartelle glibc-hwcaps, collocate nelle aree del FS, esaminate durante la ricerca delle librerie (ad esempio, \/usr\/lib64\/glibc-hwcaps\/x86-64-v2).    <\/p>\n<p>Per i file eseguibili, si propone di utilizzare un livello hwcaps-loader, che selezioner\u00e0 e avvier\u00e0 la versione del file eseguibile corrispondente alle capacit\u00e0 del sistema attuale. Per i pacchetti che forniscono pi\u00f9 versioni di file eseguibili, si propone di comunicare questo livello tramite un collegamento simbolico. La decisione di aggiungere file eseguibili ottimizzati sar\u00e0 presa dai manutentori, in base ai risultati dei test di prestazioni di specifici pacchetti.    <\/p>\n<p>Le versioni x86-64-v* definiscono un modo non ufficiale per identificare i tagli dello stato della microarchitettura, coprendo determinate set di estensioni:  <\/p>\n<ul>\n<li class=\"l\"> x86-64-v2 copre le estensioni SSE3, SSE4_2, SSSE3, POPCNT, LAHF-SAHF e CMPXCHG16B.\n<li class=\"l\"> x86-64-v3 - AVX, AVX2, BMI2, FMA, LZCNT, MOVBE e SXSAVE.\n<li class=\"l\"> x86-64-v4 - AVX512F, AVX512BW, AVX512CD, AVX512DQ e AVX512VL.   <\/ul>\n<p>In aggiunta, si pu\u00f2 notare la proposta di unificare l'aggiornamento dei bootloader grub e shim nelle versioni atomiche e tradizionali di Fedora. Invece di aggiornare il contenuto delle directory \/boot e \/boot\/efi tramite la chiamata a uno script durante l'installazione del pacchetto rpm, si propone di utilizzare lo strumento bootupd per l'aggiornamento del bootloader, che \u00e8 gi\u00e0 in uso nelle versioni aggiornabili in modo atomico di Fedora. Nei pacchetti rpm contenenti i bootloader, il contenuto \u00e8 proposto per essere installato non direttamente nelle directory \/boot e \/boot\/efi, ma in una directory separata all'interno della partizione \/usr, dopo di che il contenuto di \/boot e \/boot\/efi viene sincronizzato con esso. Questo approccio consente di implementare un'opzione di avvio secondaria, che pu\u00f2 essere utilizzata per tornare a una configurazione precedente in caso di problemi dopo l'aggiornamento del bootloader.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=62543\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u0432\u044b\u043f\u0443\u0441\u043a\u0435 Fedora 42, \u043d\u0430\u043c\u0435\u0447\u0435\u043d\u043d\u044b\u0439 \u043d\u0430 \u043a\u043e\u043d\u0435\u0446 \u0430\u043f\u0440\u0435\u043b\u044f, \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043e \u0440\u0430\u0437\u0440\u0435\u0448\u0438\u0442\u044c \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0430\u044e\u0449\u0438\u043c \u0432\u043a\u043b\u044e\u0447\u0430\u0442\u044c \u0432 \u043f\u0430\u043a\u0435\u0442\u044b \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u044b \u0438\u0441\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u044b\u0445 \u0444\u0430\u0439\u043b\u043e\u0432, \u0441\u043e\u0431\u0440\u0430\u043d\u043d\u044b\u0435 \u0441 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435\u043c \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0439 \u0434\u043b\u044f \u043c\u0438\u043a\u0440\u043e\u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440 x86-64-v2, x86-64-v3 \u0438 x86-64-v4. \u041e\u0442\u043c\u0435\u0447\u0430\u0435\u0442\u0441\u044f, \u0447\u0442\u043e Fedora \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0435\u0442 \u0441\u043e\u0431\u0438\u0440\u0430\u0442\u044c \u043f\u0430\u043a\u0435\u0442\u044b \u0434\u043b\u044f \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b x86-64-v1, \u0432 \u0442\u043e \u0432\u0440\u0435\u043c\u044f \u043a\u0430\u043a CentOS \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442 \u043f\u0440\u0438 \u0441\u0431\u043e\u0440\u043a\u0435 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u0443 x86-64-v2, \u0430 RHEL 10 &#8212; x86-64-v3. \u0412 \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u0435 \u0441\u043b\u0443\u0447\u0430\u0435\u0432 [&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-121307","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u0432\u044b\u043f\u0443\u0441\u043a\u0435 Fedora 42, \u043d\u0430\u043c\u0435\u0447\u0435\u043d\u043d\u044b\u0439 \u043d\u0430 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