Bug 428801

Summary:	Heavy GPU Load
Product:	[Applications] plasma-systemmonitor	Reporter:	Richard Llom <richard.llom>
Component:	general	Assignee:	KSysGuard Developers <ksysguard-bugs>
Status:	RESOLVED NOT A BUG
Severity:	normal	CC:	ahiemstra, justin.zobel, plasma-bugs-null
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	radeontop radeontop with auto performance

Description Richard Llom 2020-11-07 20:24:40 UTC

When I run plasma-systemmonitor with 3 line charts I have really *heavy* GPU load.

See bug 428798 for screenshot of the configuration and the temperature rise of my GPU.


Full system specs:
System:    Kernel: 5.8.18-1-MANJARO x86_64 bits: 64 Desktop: KDE Plasma 5.20.2 Distro: Manjaro Linux 
Machine:   Type: Desktop System: Micro-Star product: MS-7B89 v: 2.0 
           UEFI: American Megatrends v: A.C0 date: 01/06/2020 
CPU:       Info: 6-Core model: AMD Ryzen 5 2600X bits: 64 type: MT MCP L2 cache: 3072 KiB 
           Speed: 2402 MHz min/max: 2200/3600 MHz
Graphics:  Device-1: Advanced Micro Devices [AMD/ATI] Fiji [Radeon R9 NANO] driver: amdgpu v: kernel 
           Display: x11 server: X.Org 1.20.9 driver: amdgpu unloaded: modesetting resolution: 2560x1440~144Hz 
           OpenGL: renderer: AMD Radeon R9 Fury Series (FIJI DRM 3.38.0 5.8.18-1-MANJARO LLVM 10.0.1) v: 4.6 Mesa 20.2.1

Comment 1 Justin Zobel 2020-11-07 23:23:23 UTC

I just looked at that ticket and there was only CPU graphs showing. Can you please upload a GPU one to this bug so we can investigate, thanks.

Comment 2 2wxsy58236r3 2020-11-08 11:20:23 UTC

In attachment 133117 [details], there is a temperature graph with GPU marked in Red in the middle panel. In the bottom panel there is also a fan RPM graph (again, GPU is marked in Red).

Comment 3 Arjen Hiemstra 2020-11-08 13:26:42 UTC

The charts are rendered by the GPU, so it is expected that they increase the GPU usage. It shouldn't max out something like a R9 Fury though. However, GPU temperature/fan speed doesn't really tell how much actual usage is going on. Please check with something like radeon-top to see if your GPU is actually busy or there's just some bad thermal management going on.

Comment 4 Richard Llom 2020-11-08 14:03:19 UTC

Created attachment 133145 [details]
radeontop

Comment 5 Richard Llom 2020-11-08 14:04:09 UTC

Attached is a screenshot of radeontop over systemmonitor, showing 99% graphics pipe usage.

Comment 6 Richard Llom 2020-11-08 14:18:40 UTC

Created attachment 133147 [details]
radeontop with auto performance

Screw my previous statement, those were captured with GPU performance set to 'low'.
When I set to 'auto' performance, graphics pipe usage is "just" 30%. Power usage is however increasing from around 15 W to 75 W (not shown).

Comment 7 Bug Janitor Service 2020-11-23 04:34:11 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

Comment 8 Richard Llom 2020-11-23 09:28:39 UTC

See comment #6

Comment 9 Arjen Hiemstra 2021-02-09 13:45:39 UTC

Since everything here seems to be working as intended I am closing this.