Comments (6)
possible duplicate of: #138 (comment)
https://gitlab.freedesktop.org/drm/amd/-/issues/1967
from nvtop.
❯ cat /sys/bus/pci/devices/0000:03:00.0/pp_dpm_pcie
0: 2.5GT/s, x1 78Mhz
1: 5.0GT/s, x4 156Mhz
2: 16.0GT/s, x16 623Mhz
Hmm... What means absence of asterisk symbol?
from nvtop.
❯ cat /sys/bus/pci/devices/0000:03:00.0/pp_dpm_pcie 0: 2.5GT/s, x1 78Mhz 1: 5.0GT/s, x4 156Mhz 2: 16.0GT/s, x16 623Mhz
Hmm... What means absence of asterisk symbol?
Oh, the same problem occurred on RX 6600.
Probably it is an AMDGPU driver issue, I will report it to drm/amd.
from nvtop.
Reported: https://gitlab.freedesktop.org/drm/amd/-/issues/1447#note_2101382
from nvtop.
Hello,
Nvtop extracts the PCIe bus from the device using libudev and does not rely on pp_dpm_pcie (code). The code walks the PCIe bus from the device up to the root and takes the smallest value for speed and width it sees on the path.
The link speed is translated similar to your table here.
It can be that the reporting is wrong somewhere through the PCIe path. Also recent GPUs have internal PCIe switches that dynamically lower/increase the PCIe speed to reduce power consumption. Do you see the same value while running heavy GPU workloads (games, AI)?
from nvtop.
Do you see the same value while running heavy GPU workloads (games, AI)?
Yes
from nvtop.
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