undefined reference to `amdgpu_device_get_fd'

[CabbageSong]

When building with cargo install --locked --path ., an error launched with

undefined reference to `amdgpu_device_get_fd'

I saw amdgpu_device_get_fd was push to drm 18 months ago, but still not found in my local OS.

ps. I'm running 20.04.6, kernel version 5.15.0-72-generic

[Umio-Yasuno]

Could you try this branch?
https://github.com/Umio-Yasuno/amdgpu_top/tree/fd

[Umio-Yasuno]

amdgpu_device_get_fd was added since libdrm-2.4.109.
https://gitlab.freedesktop.org/mesa/drm/-/commit/f70e8ae83590d2a1fb1972dc7e875dd6a9355b77

libdrm-amdgpu-sys-rs used amdgpu_device_get_fd internally, which is replaced by this commit.
Umio-Yasuno/libdrm-amdgpu-sys-rs@ba36fab

[CabbageSong]

Could you try this branch? https://github.com/Umio-Yasuno/amdgpu_top/tree/fd

Hi @Umio-Yasuno , thanks for your reply. It does work for me!

libdrm-2.4.107 is the latest package for ubuntu 20.04. I guess that's the reason why 'amdgpu_device_get_fd' is lost.

[CabbageSong]

BTW, I'm not sure if it is still the issue of ubuntu version. The data under fdinfo is 0 for all:

In addition, I found that headers are different in fdinfo:

~/amdgpu_top$ cat /proc/4728/fdinfo/7
pos:    0
flags:  02100002
mnt_id: 26
ino:    623
pdev:   0000:04:00.0
pasid:  32774
vram mem:       17196 kB
gtt mem:        6144 kB
cpu mem:        0 kB
gfx0:   70.59%

It seems that data is behind vram mem and the parser is searching with drm-memory

[Umio-Yasuno]

The AMDGPU driver has changed the format of fdinfo to fix the calculation of engine usage.
It now uses the format along "drm-usage-stat.rst".
However, in Linux Kernel 5.15.xxx, the old format is still used.
I am not going to support the old format.

https://lists.freedesktop.org/archives/amd-gfx/2022-May/079291.html
https://docs.kernel.org/gpu/drm-usage-stats.html

[CabbageSong]

Okay. I'll try to install Ubuntu22.