[Bug 108942] idle power consumption of Polaris 20 GPU reported too high in amdgpu_pm_info
https://bugs.freedesktop.org/show_bug.cgi?id=108942
Bug ID: 108942 Summary: idle power consumption of Polaris 20 GPU reported too high in amdgpu_pm_info Product: DRI Version: DRI git Hardware: Other OS: All Status: NEW Severity: normal Priority: medium Component: DRM/AMDgpu Assignee: dri-devel@lists.freedesktop.org Reporter: tempel.julian@gmail.com
Created attachment 142715 --> https://bugs.freedesktop.org/attachment.cgi?id=142715&action=edit xorg log
It looks like this:
/sys/kernel/debug/dri/0/amdgpu_pm_info
Clock Gating Flags Mask: 0x3fbcf Graphics Medium Grain Clock Gating: On Graphics Medium Grain memory Light Sleep: On Graphics Coarse Grain Clock Gating: On Graphics Coarse Grain memory Light Sleep: On Graphics Coarse Grain Tree Shader Clock Gating: Off Graphics Coarse Grain Tree Shader Light Sleep: Off Graphics Command Processor Light Sleep: On Graphics Run List Controller Light Sleep: On Graphics 3D Coarse Grain Clock Gating: Off Graphics 3D Coarse Grain memory Light Sleep: Off Memory Controller Light Sleep: On Memory Controller Medium Grain Clock Gating: On System Direct Memory Access Light Sleep: Off System Direct Memory Access Medium Grain Clock Gating: On Bus Interface Medium Grain Clock Gating: Off Bus Interface Light Sleep: On Unified Video Decoder Medium Grain Clock Gating: On Video Compression Engine Medium Grain Clock Gating: On Host Data Path Light Sleep: On Host Data Path Medium Grain Clock Gating: On Digital Right Management Medium Grain Clock Gating: Off Digital Right Management Light Sleep: Off Rom Medium Grain Clock Gating: On Data Fabric Medium Grain Clock Gating: Off
GFX Clocks and Power: 300 MHz (MCLK) 300 MHz (SCLK) 600 MHz (PSTATE_SCLK) 1000 MHz (PSTATE_MCLK) 750 mV (VDDGFX) 29.159 W (average GPU)
GPU Temperature: 28 C GPU Load: 0 %
But: Physical wattmeter measures 38W for the whole system. So apparently, the reported power usage in amdgpu_pm_info must be wrong for idle.
Power consumption of the whole system is a bit lower on Windows (30W). So probably GPU power saving doesn't work as good as on Windows, but this doesn't explain the unrealistic number reported in amdgpu_pm_info.
I btw. also noticed that power saving of Vega works much better than of Polaris on Linux. With Polaris, the clocks get up real quickly for even the slightest amount of GPU load. Vega saves much more power and doesn't stutter, despite of the higher savings.
I had a RX 560 before the RX 580, and I think its idle power consumption was correctly reported with something like 3W (not 30) or so.
latest 4.21-wip kernel
https://bugs.freedesktop.org/show_bug.cgi?id=108942
--- Comment #1 from tempel.julian@gmail.com --- Created attachment 142716 --> https://bugs.freedesktop.org/attachment.cgi?id=142716&action=edit dmesg log
https://bugs.freedesktop.org/show_bug.cgi?id=108942
--- Comment #2 from Rigo Reddig rigo.reddig@gmail.com --- I can confirm observing the same behavior as Julian reports.
However I have also noticed power information reporting wrongly at the opposite extreme (Much higher idle power than reported) when two monitors are attached that force excessively high idle clock states.
https://bugs.freedesktop.org/show_bug.cgi?id=108941#c1
https://bugs.freedesktop.org/show_bug.cgi?id=108942
Rigo Reddig rigo.reddig@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Hardware|Other |x86-64 (AMD64) CC| |rigo.reddig@gmail.com
https://bugs.freedesktop.org/show_bug.cgi?id=108942
--- Comment #3 from Rigo Reddig rigo.reddig@gmail.com --- ======================================================================= Dual monitors: (Power is much higher than reported by amdgpu_pm_info) =======================================================================
Clock Gating Flags Mask: 0x3fbcf Graphics Medium Grain Clock Gating: On Graphics Medium Grain memory Light Sleep: On Graphics Coarse Grain Clock Gating: On Graphics Coarse Grain memory Light Sleep: On Graphics Coarse Grain Tree Shader Clock Gating: Off Graphics Coarse Grain Tree Shader Light Sleep: Off Graphics Command Processor Light Sleep: On Graphics Run List Controller Light Sleep: On Graphics 3D Coarse Grain Clock Gating: Off Graphics 3D Coarse Grain memory Light Sleep: Off Memory Controller Light Sleep: On Memory Controller Medium Grain Clock Gating: On System Direct Memory Access Light Sleep: Off System Direct Memory Access Medium Grain Clock Gating: On Bus Interface Medium Grain Clock Gating: Off Bus Interface Light Sleep: On Unified Video Decoder Medium Grain Clock Gating: On Video Compression Engine Medium Grain Clock Gating: On Host Data Path Light Sleep: On Host Data Path Medium Grain Clock Gating: On Digital Right Management Medium Grain Clock Gating: Off Digital Right Management Light Sleep: Off Rom Medium Grain Clock Gating: On Data Fabric Medium Grain Clock Gating: Off
GFX Clocks and Power: 2000 MHz (MCLK) 419 MHz (SCLK) 600 MHz (PSTATE_SCLK) 1000 MHz (PSTATE_MCLK) 950 mV (VDDGFX) 31.252 W (average GPU)
GPU Temperature: 44 C GPU Load: 0 %
UVD: Disabled
VCE: Disabled
======================================================================= Single Monitor: (Power is much lower than reported by amdgpu_pm_info) =======================================================================
Clock Gating Flags Mask: 0x3fbcf Graphics Medium Grain Clock Gating: On Graphics Medium Grain memory Light Sleep: On Graphics Coarse Grain Clock Gating: On Graphics Coarse Grain memory Light Sleep: On Graphics Coarse Grain Tree Shader Clock Gating: Off Graphics Coarse Grain Tree Shader Light Sleep: Off Graphics Command Processor Light Sleep: On Graphics Run List Controller Light Sleep: On Graphics 3D Coarse Grain Clock Gating: Off Graphics 3D Coarse Grain memory Light Sleep: Off Memory Controller Light Sleep: On Memory Controller Medium Grain Clock Gating: On System Direct Memory Access Light Sleep: Off System Direct Memory Access Medium Grain Clock Gating: On Bus Interface Medium Grain Clock Gating: Off Bus Interface Light Sleep: On Unified Video Decoder Medium Grain Clock Gating: On Video Compression Engine Medium Grain Clock Gating: On Host Data Path Light Sleep: On Host Data Path Medium Grain Clock Gating: On Digital Right Management Medium Grain Clock Gating: Off Digital Right Management Light Sleep: Off Rom Medium Grain Clock Gating: On Data Fabric Medium Grain Clock Gating: Off
GFX Clocks and Power: 300 MHz (MCLK) 300 MHz (SCLK) 600 MHz (PSTATE_SCLK) 1000 MHz (PSTATE_MCLK) 750 mV (VDDGFX) 28.102 W (average GPU)
GPU Temperature: 30 C GPU Load: 0 %
UVD: Disabled
VCE: Disabled
https://bugs.freedesktop.org/show_bug.cgi?id=108942
--- Comment #4 from tempel.julian@gmail.com --- I wonder why this is still an issue (linux 5.3.4, showing 30W with lowest clocks and voltages) if it already worked with Polaris 11 some years ago.
https://bugs.freedesktop.org/show_bug.cgi?id=108942
Martin Peres martin.peres@free.fr changed:
What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |MOVED Status|NEW |RESOLVED
--- Comment #5 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/629.
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