Virtio-nvgpu-prosjektet utvikler et virtio-enhet som gir tilgang til NVIDIA GPU fra gjestesystemer som kj\u00f8rer under KVM-hypervisoren, med minimal ytelsestap. Det inkluderer en kjernekatalog modul, lastet inn i gjestesystemet, og en virtio-enhet som kj\u00f8rer p\u00e5 vertsiden. Koden til kjernekatalogmodulen er skrevet i C og distribueres under GPLv2-lisensen, mens koden til virtio-enheten er skrevet i Rust og distribueres under Apache 2.0-lisensen. <\/p>\n
If\u00f8lge utviklernes vurdering overstiger ikke ytelsestapet ved tilgang til GPU 2%. H\u00f8y ytelse oppn\u00e5s ved \u00e5 omdirigere ioctl-anrop til den native NVIDIA-driveren og operere p\u00e5 NVIDIA-driverens ABI-niv\u00e5, uten oversettelse av foresp\u00f8rslene p\u00e5 API-niv\u00e5. P\u00e5 gjestesystemets side brukes standardbiblioteker og h\u00f8yniv\u00e5 NVIDIA-drivere, som kj\u00f8rer i brukerrommet. <\/p>\n
I gjestemilj\u00f8et lastes en kjerne-modul som gir enhetsfiler \/dev\/nvidiactl, \/dev\/nvidia0\u2026N, \/dev\/nvidia-uvm, og videresender ioctl() og mmap() foresp\u00f8rslene via virtqueue til en behandler i verts-milj\u00f8et, som sender dem til NVIDIA-driveren p\u00e5 verten. For \u00e5 unng\u00e5 kontekstskift mellom verts-systemet og den virtuelle maskinen, avspeiles kommandobuffere (mmap) i delt minne tilgjengelig for verts-milj\u00f8et og GPU. <\/p>\n
I motsetning til eksklusiv tilgang til GPU (VFIO Passthrough) tilbyr virtio-nvgpu delt tilgang til \u00e9n GPU fra flere gjestesystemer, virtual machines<\/a>mens virtio-gpu (Venus, VirGL) fungerer gjennom videreformidling av ABI til NVIDIA-driveren, og ikke p\u00e5 niv\u00e5et for oversettelse av grafiske API-er som Vulkan og OpenGL. Ulempene med virtio-nvgpu er mangel p\u00e5 full isolasjon basert p\u00e5 IOMMU (gjestesystemer kj\u00f8rer via verts NVIDIA-driveren og er kun begrenset til filtrering av ioctl-anrop) og avhengigheten av NVIDIA-driverens ABI (ABI endres i hver versjon og krever tilpasning av virtio-nvgpu). <\/p>\n Virtio-nvgpu har tilstrekkelige muligheter til \u00e5 utf\u00f8re rendering, videokoding og beregninger ved hjelp av API-er som Vulkan, OpenGL, NVENC og CUDA. Hovedanvendelsen nevnes som opprettelse av skybaserte spilltjenester eller virtuelle arbeidsplasser der spill eller grafiske applikasjoner kj\u00f8rer i en virtuell maskin<\/a>, der det skjer rendering, maskinvarekoding av resultatet ved hjelp av NVENC og overf\u00f8ring av utdata til en ekstern bruker i form av en komprimert videostr\u00f8m. \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 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Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"