Proiectul virtio-nvgpu dezvolta un dispozitiv virtio care permite accesul la GPU NVIDIA din sistemele guest rulandu-se pe hypervisorul KVM, cu pierderi minime de performan\u021b\u0103. Componentele includ un modul de kernel, care se \u00eencarc\u0103 \u00een sistemul guest \u0219i un dispozitiv virtio care ruleaz\u0103 \u00een mediul de host. Codul modulului kernel este scris \u00een C \u0219i distribuit sub licen\u021ba GPLv2, iar codul dispozitivului virtio este scris \u00een Rust \u0219i distribuit sub licen\u021ba Apache 2.0. <\/p>\n
Potrivit estim\u0103rilor dezvoltatorilor, pierderile de performan\u021b\u0103 la accesarea GPU-ului nu dep\u0103\u0219esc 2%. Viteza ridicat\u0103 este ob\u021binut\u0103 prin redirec\u021bionarea apelurilor ioctl c\u0103tre driverul nativ NVIDIA \u0219i func\u021bionarea la nivel ABI al driverului NVIDIA, f\u0103r\u0103 a traduce apelurile la nivel API. \u00cen sistemul guest sunt folosite biblioteci standard \u0219i drivere de \u00eenalt nivel NVIDIA care func\u021bioneaz\u0103 \u00een spa\u021biul utilizatorului. <\/p>\n
\u00cen sistemul de g\u0103zduire, se \u00eencarc\u0103 un modul kernel care furnizeaz\u0103 fi\u0219ierelor de dispozitive \/dev\/nvidiactl, \/dev\/nvidia0\u2026N, \/dev\/nvidia-uvm \u0219i redirec\u021bioneaz\u0103 apelurile ioctl() \u0219i mmap() prin virtqueue c\u0103tre handler-ul din mediu-hoste, care le trimite driver-ului NVIDIA de pe gazd\u0103. Pentru a elimina comut\u0103rile de context \u00eentre sistemul gazd\u0103 \u0219i ma\u0219ina virtual\u0103, buffer-ele de comenzi sunt reflectate (mmap) \u00een memoria partajat\u0103, accesibil\u0103 mediului gazd\u0103 \u0219i GPU-ului. <\/p>\n
Spre deosebire de redirec\u021bionarea exclusiv\u0103 a accesului la GPU (VFIO Passthrough), proiectul virtio-nvgpu ofer\u0103 acces comun la un singur GPU din mai multe ma\u0219ini virtuale<\/a>, \u0219i spre deosebire de virtio-gpu (Venus, VirGL), func\u021bioneaz\u0103 prin redirec\u021bionarea ABI c\u0103tre driverul NVIDIA, nu la nivelul traductiei API-urilor grafice Vulkan \u0219i OpenGL. Dezavantajele virtio-nvgpu includ lipsa unei izol\u0103ri complete bazate pe IOMMU (sistemele guest func\u021bioneaz\u0103 prin driverul host NVIDIA \u0219i sunt limitate doar la filtrarea apelurilor ioctl) \u0219i dependen\u021ba de ABI-urile driverelor NVIDIA (ABI se schimb\u0103 cu fiecare versiune \u0219i necesit\u0103 adaptarea virtio-nvgpu). <\/p>\n Capacit\u0103\u021bile virtio-nvgpu sunt suficiente pentru redare, codare video \u0219i calcule folosind API-urile Vulkan, OpenGL, NVENC \u0219i CUDA. Ca principal domeniu de aplicare se men\u021bioneaz\u0103 crearea de servicii de jocuri \u00een cloud sau locuri de munc\u0103 virtuale, unde jocul sau aplica\u021bia grafic\u0103 este lansat\u0103 \u00een ma\u0219ina virtual\u0103<\/a>, \u00een care se realizeaz\u0103 redarea, codificarea hardware a rezultatului utiliz\u00e2nd NVENC \u0219i transmiterea ie\u0219irii c\u0103tre utilizatorul de la distan\u021b\u0103 sub form\u0103 de flux video comprimat. \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\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 pentru a oferi acces la GPU NVIDIA din ma\u0219inile virtuale KVM | ProHoster","description":"Proiectul virtio-nvgpu dezvolt\u0103 un dispozitiv virtio care permite accesul la GPU NVIDIA din sistemele gazd\u0103, rulate sub un hypervisor KVM, cu o pierdere minim\u0103 de 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Sursa: opennet.ro<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"