Bug 101749 - sclk scales badly in war thunder
Summary: sclk scales badly in war thunder
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/Gallium/radeonsi (show other bugs)
Version: git
Hardware: Other All
: medium normal
Assignee: Default DRI bug account
QA Contact: Default DRI bug account
Depends on:
Reported: 2017-07-11 01:33 UTC by higuita
Modified: 2019-06-30 13:42 UTC (History)
0 users

See Also:
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Description higuita 2017-07-11 01:33:07 UTC
When playing with war thunder and running radeon-profile on a A10-7850k and a RX480, i notice that the GPU sclk scales from 300MHz to about 320-420MHz ... very far from the max of 1.3GHz.

The GPU load is always low, about 20-30%, but if i manually increase the sclk to the max, i get a performance increase of about 40% and the GPU load is still about the same... i found that the GPU running above about 600-700MHz, i get almost no performance increase... but the 300-400MHz is too low.

So for this game, amdgpu/radeonsi is not scaling as it should, probably the game engine do not help. As far as i know, the game is mostly OpenGL 3.2, to keep compatibility higher with older cards, if it matters.

I'm using kernel 4.12 and mesa-git 4db72852a16fc4a2a559255f9965e1d02e4f2b9c, llvm 4.0.1 , on a slackware 64.

The game is free and have benchmark included, so anyone can test it.
Comment 1 Christoph Haag 2017-07-11 16:00:30 UTC
Possibly the same as bug 100742 which is very visible with SteamVR.
Comment 2 higuita 2017-09-29 00:36:33 UTC
a apitrace link in https://bugs.freedesktop.org/show_bug.cgi?id=101978#c5 may help test this.

talking with other people, looks like amdgpu and war thunder are performing badly in several GPUs, if not all of then
Comment 3 Timothy Arceri 2019-06-25 01:10:30 UTC
Reports from bug 100742 are that this issue has improved with recent kernel updates. Can you confirm is this is still an issue?
Comment 4 higuita 2019-06-30 13:42:30 UTC
war thunder game downgraded the existent opengl4 engine  (used only by linux) to opengl3 (share with macosx), to free resources to develop the vulkan version, so i can't test anymore the same setup...

... but testing with the current oepngl3 version, sclk jumps to the max frequency when the game is running, so i would say that this really improved a lot in recent kernels

i'm using right now kernel 5.1.x kernel and mesa 19.1.1

So this can probably be closed

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