Projekt virtio-nvgpu rozv\u00edj\u00ed virtio za\u0159\u00edzen\u00ed, kter\u00e9 umo\u017e\u0148uje p\u0159\u00edstup k GPU NVIDIA z hostitelsk\u00fdch syst\u00e9m\u016f b\u011b\u017e\u00edc\u00edch pod hypervizorem KVM s minim\u00e1ln\u00edm sn\u00ed\u017een\u00edm v\u00fdkonu. Sou\u010d\u00e1st\u00ed je modul j\u00e1dra nahr\u00e1van\u00fd do hostitelsk\u00e9ho syst\u00e9mu a virtio za\u0159\u00edzen\u00ed prov\u00e1d\u011bn\u00e9 na stran\u011b hostitelsk\u00e9ho prost\u0159ed\u00ed. K\u00f3d modulu j\u00e1dra je naps\u00e1n v jazyce C a je distribuov\u00e1n pod licenc\u00ed GPLv2, zat\u00edmco k\u00f3d virtio za\u0159\u00edzen\u00ed je naps\u00e1n v Rustu a je distribuov\u00e1n pod licenc\u00ed Apache 2.0. <\/p>\n
Podle odhad\u016f v\u00fdvoj\u00e1\u0159\u016f ztr\u00e1ta v\u00fdkonu p\u0159i p\u0159\u00edstupu k GPU nep\u0159esahuje 2 %. Vysok\u00e9 rychlosti se dosahuje d\u00edky p\u0159esm\u011brov\u00e1n\u00ed ioctl vol\u00e1n\u00ed na nativn\u00ed ovlada\u010d NVIDIA a pr\u00e1ci na \u00farovni ABI ovlada\u010de NVIDIA, bez p\u0159eklad\u016f po\u017eadavk\u016f na \u00farovni API. Na stran\u011b hostitelsk\u00e9ho syst\u00e9mu se pou\u017e\u00edvaj\u00ed standardn\u00ed knihovny a vysoce \u00farov\u0148ov\u00e9 ovlada\u010de NVIDIA, kter\u00e9 b\u011b\u017e\u00ed v u\u017eivatelsk\u00e9m prostoru. <\/p>\n
V hostitelsk\u00e9m syst\u00e9mu se na\u010d\u00edt\u00e1 j\u00e1drov\u00fd modul, kter\u00fd poskytuje za\u0159\u00edzen\u00ed soubor\u016f \/dev\/nvidiactl, \/dev\/nvidia0\u2026N, \/dev\/nvidia-uvm a p\u0159esm\u011brov\u00e1v\u00e1 vol\u00e1n\u00ed ioctl() a mmap() p\u0159es virtqueue k obslu\u017en\u00e9mu modulu na hostitelsk\u00e9m prost\u0159ed\u00ed, kter\u00fd je p\u0159ed\u00e1v\u00e1 ovlada\u010di NVIDIA na hostiteli. Aby se eliminovaly p\u0159ep\u00edn\u00e1n\u00ed kontextu mezi hostitelsk\u00fdm syst\u00e9mem a virtu\u00e1ln\u00edm strojem, jsou p\u0159\u00edkazy odr\u00e1\u017eeny (mmap) do sd\u00edlen\u00e9 pam\u011bti, kter\u00e1 je dostupn\u00e1 hostitelsk\u00e9mu prost\u0159ed\u00ed a GPU. <\/p>\n
Na rozd\u00edl od exkluzivn\u00edho p\u0159\u00edstupu k GPU (VFIO Passthrough) projekt virtio-nvgpu umo\u017e\u0148uje sd\u00edlen\u00fd p\u0159\u00edstup k jednomu GPU z v\u00edce virtu\u00e1ln\u00edch stroj\u016f<\/a>, a na rozd\u00edl od virtio-gpu (Venus, VirGL) pracuje skrze p\u0159ed\u00e1n\u00ed ABI k ovlada\u010di NVIDIA, ne na \u00farovni p\u0159eklad\u016f grafick\u00fdch API Vulkan a OpenGL. Nev\u00fdhodami virtio-nvgpu jsou nedostatek pln\u00e9 izolace na b\u00e1zi IOMMU (hostitelsk\u00e9 syst\u00e9my pracuj\u00ed skrze hostitelsk\u00fd ovlada\u010d NVIDIA a jsou omezeny pouze na filtrov\u00e1n\u00ed vol\u00e1n\u00ed ioctl) a vazba na ABI ovlada\u010de NVIDIA (ABI se m\u011bn\u00ed v ka\u017ed\u00e9 verzi a vy\u017eaduje adaptaci virtio-nvgpu). <\/p>\n Mo\u017enosti virtio-nvgpu jsou dostate\u010dn\u00e9 pro rendering, k\u00f3dov\u00e1n\u00ed videa a v\u00fdpo\u010dty pomoc\u00ed API Vulkan, OpenGL, NVENC a CUDA. Hlavn\u00ed oblast\u00ed pou\u017eit\u00ed je uvedeno vytv\u00e1\u0159en\u00ed cloudov\u00fdch hern\u00edch slu\u017eeb nebo virtu\u00e1ln\u00edch pracovn\u00edch m\u00edst, ve kter\u00fdch je hra nebo grafick\u00e1 aplikace spu\u0161t\u011bna v virtu\u00e1ln\u00edm stroji<\/a>, ve kter\u00e9 doch\u00e1z\u00ed k renderov\u00e1n\u00ed, hardwarov\u00e9mu k\u00f3dov\u00e1n\u00ed v\u00fdsledku pomoc\u00ed NVENC a p\u0159enosu v\u00fdstupu vzd\u00e1len\u00e9mu u\u017eivateli ve form\u011b 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 pro poskytov\u00e1n\u00ed p\u0159\u00edstupu k GPU NVIDIA z virtu\u00e1ln\u00edch stroj\u016f KVM | ProHoster","description":"Projekt virtio-nvgpu rozv\u00edj\u00ed virtio za\u0159\u00edzen\u00ed, kter\u00e9 umo\u017e\u0148uje p\u0159\u00edstup k GPU NVIDIA z hostitelsk\u00fdch syst\u00e9m\u016f b\u011b\u017e\u00edc\u00edch pod hypervisorem KVM s minim\u00e1ln\u00ed ztr\u00e1tou 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Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"