[Bug 106303] amdgpu on RX 560: memory and core clocks not lowered on idle

[Bug 106303] amdgpu on RX 560: memory and core clocks not lowered on idle

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106303

            Bug ID: 106303
           Summary: amdgpu on RX 560: memory and core clocks not lowered
                    on idle
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: bugs.freedesktop.org@pm.port0.org

Created attachment 139206
  --> https://bugs.freedesktop.org/attachment.cgi?id=139206&action=edit
amdgpu_pm_info with 4.15 kernel

There is a problem with amdgpu power management.
With kernels 4.15.X MCLK is always stays at max value.
With kernels 4.16.X MCLK/SCLK both stays at max.

At idle desktop GPU draws about 4W more, according to
/sys/kernel/debug/dri/0/amdgpu_pm_info

Kernels from Ubuntu PPA
http://kernel.ubuntu.com/~kernel-ppa/mainline/

DRM/Mesa libs from Oibaf PPA
https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers

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[Bug 106303] amdgpu on RX 560: memory and core clocks not lowered on idle

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https://bugs.freedesktop.org/show_bug.cgi?id=106303

--- Comment #1 from Mike <bugs.freedesktop.org@pm.port0.org> ---
Created attachment 139207
  --> https://bugs.freedesktop.org/attachment.cgi?id=139207&action=edit
amdgpu_pm_info with 4.16 kernel

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[Bug 106303] amdgpu on RX 560: memory and core clocks not lowered on idle

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106303

--- Comment #2 from Mike <bugs.freedesktop.org@pm.port0.org> ---
Created attachment 139208
  --> https://bugs.freedesktop.org/attachment.cgi?id=139208&action=edit
syslog (non0\-kernel stuff removed)

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[Bug 106303] amdgpu on RX 560: memory and core clocks not lowered on idle

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106303

--- Comment #3 from Mike <bugs.freedesktop.org@pm.port0.org> ---
Also noted, that
/sys/class/drm/card0/device/pp_num_states is limited to:
states: 2
0 boot
1 performance

And power_dpm_state is always 'performance' regarless of values echoed to
power_dpm_force_performance_level (tried 'low', 'auto', 'balanced' and 'boot').

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[Bug 106303] amdgpu on RX 560: memory and core clocks not lowered on idle

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106303

--- Comment #4 from Alex Deucher <alexdeucher@gmail.com> ---
Can you bisect?  Are you using multiple monitors?

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[Bug 106303] amdgpu on RX 560: memory and core clocks not lowered on idle

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https://bugs.freedesktop.org/show_bug.cgi?id=106303

--- Comment #5 from Mike <bugs.freedesktop.org@pm.port0.org> ---
>Can you bisect?
No, I'm using pre-compiled kernels.
However, it's clearly happens in-between 4.15.8 and 4.16.{0 .. 2}.
Reproduces stably.

>Are you using multiple monitors?
No, single monitor via DisplayPort (2560x1440x144).

PS. I'm also use amdgpu.dc=1

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[Bug 106303] amdgpu on RX 560: memory and core clocks not lowered on idle

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https://bugs.freedesktop.org/show_bug.cgi?id=106303

--- Comment #6 from Julian <jsbansen@gmail.com> ---
Can confirm. I'm using a Rx 560 on kernel 4.16 and my clock rate is stuck on
1230MHz permanently.

I'm also using a single 2560x1440x144 monitor

This is directly related to DC. If I run with amdgpu.dc=0 the issue disappears.
If I run with amdgpu.dc=1 it shows up. I can't say if it also happened on 4.15
or earlier.

I did notice that dmesg shows about a dozen powerplay errors:

[   94.582083] amdgpu: [powerplay] 
                failed to send message 146 ret is 255 
[   94.582091] amdgpu: [powerplay] 
                failed to send pre message 147 ret is 255 
[   95.895976] amdgpu: [powerplay] 
                failed to send message 145 ret is 255

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[Bug 106303] amdgpu on RX 560: memory and core clocks not lowered on idle

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https://bugs.freedesktop.org/show_bug.cgi?id=106303

--- Comment #7 from Mike <bugs.freedesktop.org@pm.port0.org> ---
Power usage partially improved with kernel 4.17.2
Both MCLK and SCLK now lowered to full idle - when monitor is turned OFF.

Also MCLK seems to go idle (300MHz) periodically under low load (2D and
browsing).
However, SCLK is still run at top values when monitor is ON, regardless of GPU
load (it is about 1-2% according to radeontop utility).

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[Bug 106303] amdgpu on RX 560: memory and core clocks not lowered on idle

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https://bugs.freedesktop.org/show_bug.cgi?id=106303

--- Comment #8 from Julian <jsbansen@gmail.com> ---
This appears to be fixed for me on 4.18.16. My 570's shader clock now properly
goes down to 300MHz on idle, like it does using amdgpu.dc=0.

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[Bug 106303] amdgpu on RX 560: memory and core clocks not lowered on idle

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https://bugs.freedesktop.org/show_bug.cgi?id=106303

Martin Peres <martin.peres@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |MOVED

--- Comment #9 from Martin Peres <martin.peres@free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/367.

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