i was working on a v-GPU POC using PVE Since Broadcom Screwed us with the Vsphere licensing costs (New post incoming about this adventure)
anyway i needed to find the PCI-E Slot used for the A4000 GPU on the host to disable it for troubleshooting
Guide
First we need to find the occupied slots and the Bus address for each slot
sudo dmidecode -t slot | grep -E "Designation|Usage|Bus Address"
Output will show the Slot ID, Usage and then the Bus Address
Designation: CPU SLOT1 PCI-E 4.0 X16
Current Usage: Available
Bus Address: 0000:ff:00.0
Designation: CPU SLOT2 PCI-E 4.0 X8
Current Usage: In Use
Bus Address: 0000:41:00.0
Designation: CPU SLOT3 PCI-E 4.0 X16
Current Usage: In Use
Bus Address: 0000:c1:00.0
Designation: CPU SLOT4 PCI-E 4.0 X8
Current Usage: Available
Bus Address: 0000:ff:00.0
Designation: CPU SLOT5 PCI-E 4.0 X16
Current Usage: In Use
Bus Address: 0000:c2:00.0
Designation: CPU SLOT6 PCI-E 4.0 X16
Current Usage: Available
Bus Address: 0000:ff:00.0
Designation: CPU SLOT7 PCI-E 4.0 X16
Current Usage: In Use
Bus Address: 0000:81:00.0
Designation: PCI-E M.2-M1
Current Usage: Available
Bus Address: 0000:ff:00.0
Designation: PCI-E M.2-M2
Current Usage: Available
Bus Address: 0000:ff:00.0
We can use lspci -s #BusAddress# to locate whats installed on each slot
lspci -s 0000:c2:00.0
c2:00.0 3D controller: NVIDIA Corporation GA102GL [RTX A5000] (rev a1)
lspci -s 0000:81:00.0
81:00.0 VGA compatible controller: NVIDIA Corporation GA104GL [RTX A4000] (rev a1)
Im sure there is a much more elegant way to do this, but this worked as a quick ish way to find what i needed. if you know a better way please share in the comments
Until next time!!!
Reference –
https://stackoverflow.com/questions/25908782/in-linux-is-there-a-way-to-find-out-which-pci-card-is-plugged-into-which-pci-sl
