The frameīuffer used by the hypervisor is not available for vGPUs on the physical GPU. Some of the physical GPU's frame buffer is used by the hypervisor on behalf of the VMįor allocations that the guest OS would otherwise have made in its own frame buffer. Jun 26 08:01:25 srvxen06f vgpu-3: error: vmiop_log: (0x0): VGPU message 6 failed, result code: 0x1a Jun 26 08:01:25 srvxen06f vgpu-3: error: vmiop_log: (0x0): Guest attempted to allocate channel above its max channel limit 0xfb
When the channels allocated to a vGPU are exhausted and the guest VM fails to allocate aĬhannel, the following errors are reported on the hypervisor host or in an NVIDIA bug Proportional to the maximum number of vGPUs allowed on the physical GPU. Number of channels and the number of channels allocated to each vGPU is inversely The vGPU is assigned fails to allocate a channel to the vGPU. Issues occur when the channels allocated to a vGPU are exhausted and the guest VM to which For example, if you are assigning four GPUs to a VM thatĮach use a total of 128 GiB of BAR1 memory, the amount of MMIO space pciPassthru.64bitMMIOSizeGB = " mmio-space-in-gb" mmio-space-in-gb The required amount of MMIO space in GiB that you calculated Allocate the required amount of MMIO space to the VM.Under the VM settings, choose VM Options.
MMIO space that is required for all the GPUs is 4⨯128 GiB, which equals That you are assigning in pass-through mode to the VM.įor example, if you are assigning four GPUs to a VM, the amount of Multiply the total BAR1 memory usage for each GPU by the number of GPUs.In this example, the total BAR1 memory usage for each GPU is 128 On the hypervisor host, get the total BAR1 memory usage for each.Want to assign in pass-through mode to the VM. Calculate the amount of MMIO space that is required for all the GPUs that you.If you are assigning multiple GPUs in pass-through mode to a single VM,Įnsure that you allocate enough MMIO space to the VM for all the GPUs.
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