GitHub user tdtmusic2 closed a discussion: GPU in passthrough mode on KVM
Hi all. Did anyone manage to get a gpu to be usable in ACS in passthrough mode
on a KVM host? For me, it seems that the host is not added to the
host_gpu_groups table in the database, because I get the error bellow when
trying to deploy a vm with a gpu-enabled offering:
`Unable to orchestrate start VM instance
{"id":2284,"instanceName":"i-2-2284-VM","type":"User","uuid":"10bf3221-bb21-4879-8691-f3dc6cb5f920"}
due to [DB Exception on: com.mysql.cj.jdbc.ClientPreparedStatement: SELECT
host_gpu_groups.id, host_gpu_groups.group_name, host_gpu_groups.host_id FROM
host_gpu_groups INNER JOIN vgpu_types groupId ON
host_gpu_groups.id=groupId.gpu_group_id WHERE host_gpu_groups.host_id = 176 AND
host_gpu_groups.group_name =
x'47726f7570206f66204e766964696120436f72706f726174696f6e205455313034474c205b5465736c612054345d2047505573'
AND (groupId.vgpu_type = x'706173737468726f756768' AND
groupId.remaining_capacity > 0 ) ORDER BY vgpu_types.remaining_capacity DESC ].`
I have this in the agent.properties:
```
enable.pci.passthrough=true
pci.devices.in.vm=nvidia,10de,1eb8
pci.device.mode=nvidia-tesla-t4
nvidia.gpu.enable=true
```
If I try to
add`libvirt.vif.driver=com.cloud.hypervisor.kvm.resource.LibvirtVifDriver` to
it the agent service does not start anymore, so I left it out. A virsh dumpxml
command on the gpu's pci id seems to report ok:
```
<device>
<name>pci_0000_61_00_0</name>
<path>/sys/devices/pci0000:60/0000:60:03.1/0000:61:00.0</path>
<parent>pci_0000_60_03_1</parent>
<driver>
<name>vfio-pci</name>
</driver>
<capability type='pci'>
<class>0x030200</class>
<domain>0</domain>
<bus>97</bus>
<slot>0</slot>
<function>0</function>
<product id='0x1eb8'>TU104GL [Tesla T4]</product>
<vendor id='0x10de'>NVIDIA Corporation</vendor>
<capability type='virt_functions' maxCount='16'/>
<iommuGroup number='65'>
<address domain='0x0000' bus='0x61' slot='0x00' function='0x0'/>
</iommuGroup>
<numa node='3'/>
<pci-express>
<link validity='cap' port='0' speed='8' width='16'/>
<link validity='sta' speed='8' width='8'/>
</pci-express>
</capability>
</device>
```
GitHub link: https://github.com/apache/cloudstack/discussions/10112
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