commit c682631f888cba13a8de489d2a435fce24578571
parent 26e3c9d598bbefbf8862b0aa135dbed6ed0f2089
Author: Kévin Le Gouguec <kevin.legouguec@gmail.com>
Date: Sun, 2 Feb 2025 18:01:51 +0100
Add a sysfs knob to the pile
Diffstat:
1 file changed, 18 insertions(+), 5 deletions(-)
diff --git a/guides/sysadmin/machines/amdahl30/killing-time.org b/guides/sysadmin/machines/amdahl30/killing-time.org
@@ -291,6 +291,19 @@ not overwork it to death?
/Software/, logging out & back in frees up some VRAM. It also
yields compositing glitches 🤷
- More to the point, /it has no effect on the symptoms in-game/.
+
+- Figured I would ask ValveSoftware/Proton about the logs; filed
+ [[https://github.com/ValveSoftware/Proton/issues/8424][#8424]]; got dup'd into [[https://github.com/ValveSoftware/Proton/issues/7805][#7805]], per the "one report per game" policy.
+ That issue is about a /crash on Alt-Tab/, with an /Nvidia dGPU/;
+ unsure how lumping our two reports together will help. Had to try 🤷
+
+- Found [[https://gitlab.freedesktop.org/drm/amd/-/issues/2516][drm/amd#2516]]; noticed that I have
+ - =/sys/module/gpu_sched/parameters/sched_policy=: 1
+ - =/sys/module/amdgpu/parameters/sched_policy=: 0
+ Changed the kernel command-line to set the former to 0, as suggested
+ in that issue; symptoms persist. No idea what the latter is about,
+ nor how it differs from the former. I can find [[https://docs.kernel.org/gpu/amdgpu/module-parameters.html#sched-policy-int][the docs for amdgpu]]
+ but nor for gpu_sched.
* This is insane
Selected subset of moving parts; "testability" considering ease of
clean reverts:
@@ -309,11 +322,11 @@ clean reverts:
That's looking at software packages as individual blackboxes;
config-wise, worth noting:
-| Part | Testability |
-|-----------------+--------------------|
-| AMD pstate | 😬 UEFI roundtrip |
-| sysfs | OK |
-| Plasma Renderer | OK |
+| Part | Testability |
+|-----------------+---------------------------------------------------|
+| AMD pstate | 😬 UEFI roundtrip |
+| sysfs | OK; worst case: reboot & edit kernel command-line |
+| Plasma Renderer | OK |
Let's throw in:
