Projekt virtio-nvgpu vyv\u00edja virtio-zariadenie, ktor\u00e9 umo\u017e\u0148uje pr\u00edstup k GPU NVIDIA z hos\u0165ovsk\u00fdch syst\u00e9mov be\u017eiacich pod hyperv\u00edzorom KVM s minim\u00e1lnou stratou v\u00fdkonu. Obsahuje modul jadra, ktor\u00fd je na\u010d\u00edtan\u00fd do hos\u0165ovsk\u00e9ho syst\u00e9mu a virtio-zariadenie, ktor\u00e9 funguje na strane hostite\u013esk\u00e9ho prostredia. K\u00f3d modulu jadra je nap\u00edsan\u00fd v jazyku C a je distribuovan\u00fd pod licenciou GPLv2, zatia\u013e \u010do k\u00f3d virtio-zariadenia je nap\u00edsan\u00fd v Ruste a je distribuovan\u00fd pod licenciou Apache 2.0. <\/p>\n
Pod\u013ea odhadov v\u00fdvoj\u00e1rov strata v\u00fdkonu pri pr\u00edstupe k GPU nepresahuje 2%. Vysok\u00e1 r\u00fdchlos\u0165 je dosiahnut\u00e1 v\u010faka presmerovaniu ioctl-volan\u00ed na nat\u00edvny ovl\u00e1da\u010d NVIDIA a pr\u00e1ci na \u00farovni ABI ovl\u00e1da\u010da NVIDIA, bez prekladu po\u017eiadaviek na \u00farovni API. Na strane hos\u0165ovsk\u00e9ho syst\u00e9mu sa pou\u017e\u00edvaj\u00fa \u0161tandardn\u00e9 kni\u017enice a vysokolevelov\u00e9 ovl\u00e1da\u010de NVIDIA, ktor\u00e9 funguj\u00fa v pou\u017e\u00edvate\u013eskom priestore. <\/p>\n
V hostite\u013eskom syst\u00e9me sa na\u010d\u00edta modul jadra, ktor\u00fd poskytuje s\u00fabory zariaden\u00ed \/dev\/nvidiactl, \/dev\/nvidia0\u2026N, \/dev\/nvidia-uvm a pren\u00e1\u0161a volania ioctl() a mmap() prostredn\u00edctvom virtqueue k obslu\u017en\u00e9mu programu na strane hostite\u013esk\u00e9ho prostredia, ktor\u00fd ich odovzd\u00e1va hostite\u013esk\u00e9mu ovl\u00e1da\u010du NVIDIA. Aby sa eliminovali prep\u00ednania kontextu medzi hostite\u013esk\u00fdm syst\u00e9mom a virtu\u00e1lnym strojom, pr\u00edkazov\u00e9 buffery sa zrkadlia (mmap) do zdie\u013eanej pam\u00e4te, pr\u00edstupnej hostite\u013esk\u00e9mu prostrediu a GPU. <\/p>\n
Na rozdiel od exkluz\u00edvneho presmerovania pr\u00edstupu k GPU (VFIO Passthrough) projekt virtio-nvgpu zabezpe\u010duje zdie\u013ean\u00fd pr\u00edstup k jedn\u00e9mu GPU z viacer\u00fdch virtu\u00e1ln\u00edch stroj\u016f<\/a>, a na rozdiel od virtio-gpu (Venus, VirGL) pracuje cez presmerovanie ABI na ovl\u00e1da\u010d NVIDIA, a nie na \u00farovni prekladu grafick\u00fdch API Vulkan a OpenGL. Nev\u00fdhodami virtio-nvgpu s\u00fa nedostatok plnohodnotnej izol\u00e1cie na b\u00e1ze IOMMU (hos\u0165ovsk\u00e9 syst\u00e9my pracuj\u00fa cez hostite\u013esk\u00fd ovl\u00e1da\u010d NVIDIA a s\u00fa obmedzen\u00e9 len na filtrovanie volan\u00ed ioctl) a vazba na ABI ovl\u00e1da\u010dov NVIDIA (ABI sa men\u00ed v ka\u017edej verzii a vy\u017eaduje adapt\u00e1ciu virtio-nvgpu). <\/p>\n Mo\u017enosti virtio-nvgpu s\u00fa dostato\u010dn\u00e9 na renderovanie, k\u00f3dovanie videa a v\u00fdpo\u010dty pomocou API Vulkan, OpenGL, NVENC a CUDA. Ako hlavn\u00e1 oblas\u0165 aplik\u00e1cie je spom\u00ednan\u00e9 vytv\u00e1ranie cloudov\u00fdch hern\u00fdch slu\u017eieb alebo virtu\u00e1lnych pracovn\u00fdch miest, kde sa hra alebo grafick\u00e1 aplik\u00e1cia sp\u00fa\u0161\u0165a v virtu\u00e1lnom stroji<\/a>, ktor\u00e1 zabezpe\u010duje rendrovanie, hardv\u00e9rov\u00e9 k\u00f3dovanie v\u00fdsledku pomocou NVENC a prenos v\u00fdstupu vzdialen\u00e9mu u\u017e\u00edvate\u013eovi vo forme komprimovan\u00e9ho video streamu. \u041f\u0440\u043e\u0435\u043a\u0442 virtio-nvgpu \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u0442 virtio-\u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u043e, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0435 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u043a GPU NVIDIA \u0438\u0437 \u0433\u043e\u0441\u0442\u0435\u0432\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c, \u0437\u0430\u043f\u0443\u0449\u0435\u043d\u043d\u044b\u0445 \u043f\u043e\u0434 \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435\u043c \u0433\u0438\u043f\u0435\u0440\u0432\u0438\u0437\u043e\u0440\u0430 KVM, \u0441 \u043c\u0438\u043d\u0438\u043c\u0430\u043b\u044c\u043d\u043e\u0439 \u043f\u043e\u0442\u0435\u0440\u0435\u0439 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438. \u0412 \u0441\u043e\u0441\u0442\u0430\u0432 \u0432\u0445\u043e\u0434\u0438\u0442 \u043c\u043e\u0434\u0443\u043b\u044c \u044f\u0434\u0440\u0430, \u0437\u0430\u0433\u0440\u0443\u0436\u0430\u0435\u043c\u044b\u0439 \u0432 \u0433\u043e\u0441\u0442\u0435\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0438 virtio-\u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u043e, \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u043e\u0435 \u043d\u0430 \u0441\u0442\u043e\u0440\u043e\u043d\u0435 \u0445\u043e\u0441\u0442-\u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f. \u041a\u043e\u0434 \u043c\u043e\u0434\u0443\u043b\u044f \u044f\u0434\u0440\u0430 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421\u0438 \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 GPLv2, \u0430 \u043a\u043e\u0434 virtio-\u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 Rust […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-183477","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\n","aioseo_head_json":{"title":"\ud83e\udd47virtio-nvgpu \u2014 modul na poskytovanie pr\u00edstupu k GPU NVIDIA z virtu\u00e1lnych strojov KVM | ProHoster","description":"Projekt virtio-nvgpu rozv\u00edja virtio zariadenie, ktor\u00e9 umo\u017e\u0148uje pr\u00edstup k GPU NVIDIA z hos\u0165uj\u00facich syst\u00e9mov be\u017eiacich pod hyperv\u00edzorom KVM, s minim\u00e1lnym poklesom 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Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"