* [Bug 52345] New: KMS Power Management have no effect
@ 2012-07-21 16:30 bugzilla-daemon
2012-07-21 16:43 ` [Bug 52345] " bugzilla-daemon
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From: bugzilla-daemon @ 2012-07-21 16:30 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=52345
Bug #: 52345
Summary: KMS Power Management have no effect
Classification: Unclassified
Product: DRI
Version: XOrg CVS
Platform: Other
OS/Version: All
Status: NEW
Severity: normal
Priority: medium
Component: DRM/Radeon
AssignedTo: dri-devel@lists.freedesktop.org
ReportedBy: d2xdt2@gmail.com
Using
OpenGL vendor string: X.Org
OpenGL renderer string: Gallium 0.4 on AMD SUMO2
OpenGL version string: 2.1 Mesa 8.0.3
OpenGL shading language version string: 1.20
AMD A4-3400 APU with Radeon(tm) HD Graphics
Fedora 17 64bit
Linux amd 3.4.5-2.fc17.x86_64 #1 SMP Mon Jul 16 20:52:08 UTC 2012 x86_64 x86_64
x86_64 GNU/Linux
According to
http://wiki.x.org/wiki/RadeonFeature
should
echo profile > /sys/class/drm/card0/device/power_method
echo high > /sys/class/drm/card0/device/power_profile
put the GPU in high performance mode and
echo profile > /sys/class/drm/card0/device/power_method
echo low > /sys/class/drm/card0/device/power_profile
in low performance mode.
glxgears gives 60 FPS in both cases, which leads me to beleive that power
management does work.
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* [Bug 52345] KMS Power Management have no effect
2012-07-21 16:30 [Bug 52345] New: KMS Power Management have no effect bugzilla-daemon
@ 2012-07-21 16:43 ` bugzilla-daemon
2012-07-21 23:54 ` bugzilla-daemon
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From: bugzilla-daemon @ 2012-07-21 16:43 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=52345
--- Comment #1 from Matt Turner <mattst88@gmail.com> 2012-07-21 16:43:06 UTC ---
(In reply to comment #0)
> glxgears gives 60 FPS in both cases, which leads me to beleive that power
> management does work.
Does your glxgears print this?
> Running synchronized to the vertical refresh. The framerate should be
> approximately the same as the monitor refresh rate.
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* [Bug 52345] KMS Power Management have no effect
2012-07-21 16:30 [Bug 52345] New: KMS Power Management have no effect bugzilla-daemon
2012-07-21 16:43 ` [Bug 52345] " bugzilla-daemon
@ 2012-07-21 23:54 ` bugzilla-daemon
2012-07-22 0:39 ` bugzilla-daemon
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From: bugzilla-daemon @ 2012-07-21 23:54 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=52345
--- Comment #2 from Martin <d2xdt2@gmail.com> 2012-07-21 16:54:21 PDT ---
Yes it does.
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* [Bug 52345] KMS Power Management have no effect
2012-07-21 16:30 [Bug 52345] New: KMS Power Management have no effect bugzilla-daemon
2012-07-21 16:43 ` [Bug 52345] " bugzilla-daemon
2012-07-21 23:54 ` bugzilla-daemon
@ 2012-07-22 0:39 ` bugzilla-daemon
2012-07-22 2:13 ` bugzilla-daemon
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From: bugzilla-daemon @ 2012-07-22 0:39 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=52345
--- Comment #3 from Matt Turner <mattst88@gmail.com> 2012-07-21 17:39:50 PDT ---
(In reply to comment #2)
> Yes it does.
So... vsync is making glxgears run at 60 FPS no matter what..
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* [Bug 52345] KMS Power Management have no effect
2012-07-21 16:30 [Bug 52345] New: KMS Power Management have no effect bugzilla-daemon
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From: bugzilla-daemon @ 2012-07-22 2:13 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=52345
--- Comment #4 from Amadeus <sha256sum@gmail.com> 2012-07-21 19:13:08 PDT ---
I see.
If I do
glxgears -geometry 1600x1024+0+0
then I get 40 FPS in both cases instead of 60fps. It takes ~3% CPU.
If I start a 3D game in Wine, it feels the same (very slow).
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* [Bug 52345] KMS Power Management have no effect
2012-07-21 16:30 [Bug 52345] New: KMS Power Management have no effect bugzilla-daemon
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From: bugzilla-daemon @ 2012-07-22 22:06 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=52345
--- Comment #9 from Amadeus <sha256sum@gmail.com> 2012-07-22 22:06:18 UTC ---
Created attachment 64513
--> https://bugs.freedesktop.org/attachment.cgi?id=64513
xorg log with drm.debug=6
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* [Bug 52345] KMS Power Management have no effect
2012-07-21 16:30 [Bug 52345] New: KMS Power Management have no effect bugzilla-daemon
` (4 preceding siblings ...)
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From: bugzilla-daemon @ 2012-07-22 22:18 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=52345
--- Comment #11 from Grigori Goronzy <greg@chown.ath.cx> 2012-07-22 22:18:02 UTC ---
Not much, actually, the table looks very similar to AMD PALM / Radeon 6320 on
my netbook. The GPU part of Zacate and Llano is probably very similar, except
for clocks and number of shader cores. And that means you suffer from the same
issues.
IMHO the sanity check that limits the clock should be removed altogether, as it
doesn't make much sense. If you fancy recompiling the kernel, just comment this
out from radeon_pm.c:
189 if (sclk > rdev->pm.default_sclk)
190 sclk = rdev->pm.default_sclk;
This should get clock switching going.
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* [Bug 52345] KMS Power Management have no effect
2012-07-21 16:30 [Bug 52345] New: KMS Power Management have no effect bugzilla-daemon
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2012-07-22 22:18 ` bugzilla-daemon
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From: bugzilla-daemon @ 2012-07-23 3:26 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=52345
Sven Arvidsson <sa@whiz.se> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sa@whiz.se
--- Comment #5 from Sven Arvidsson <sa@whiz.se> 2012-07-22 20:26:38 PDT ---
There should be a way to check the engine clock to see if it's running at full
speed:
# cat /sys/kernel/debug/dri/0/radeon_pm_info
You'll need debugfs mounted first.
There was some talk on Phoronix about another APU running with very low clocks,
could be something similar here perhaps?
http://phoronix.com/forums/showthread.php?72046-E-450-graphics-performance-issues
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* [Bug 52345] KMS Power Management have no effect
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From: bugzilla-daemon @ 2012-07-23 4:13 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=52345
--- Comment #6 from Amadeus <sha256sum@gmail.com> 2012-07-22 21:13:23 PDT ---
Very interesting thread. It seams to be the same problem I have.
Regardless of the power settings I never get a higher engine clock than ~75kHz.
[root@amd ~]# cat /sys/kernel/debug/dri/0/radeon_pm_info
default engine clock: 200000 kHz
current engine clock: 73950 kHz
default memory clock: 533000 kHz
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* [Bug 52345] KMS Power Management have no effect
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From: bugzilla-daemon @ 2012-07-23 4:46 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=52345
--- Comment #7 from Grigori Goronzy <greg@chown.ath.cx> 2012-07-22 21:46:19 PDT ---
You might have the same problem as me, see
http://lists.freedesktop.org/archives/dri-devel/2012-July/025159.html
First, the engine clock readout seems to be completely bogus on APUs, disregard
it.
Second, the power management functions limit the maximum engine clock to the
default engine clock. On most standalone GPUs, the default clock seems to be
equivalent to the maximum p-state's clock, so that is fine. Not so much on the
APUs!
I'm interested in what the AtomBIOS PowerPlay table looks like on your device.
Can you boot with drm.debug=6 in the kernel command line and tell me what it
says in the log?
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* [Bug 52345] KMS Power Management have no effect
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From: bugzilla-daemon @ 2012-07-23 5:05 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=52345
--- Comment #8 from Amadeus <sha256sum@gmail.com> 2012-07-22 22:05:25 PDT ---
Created attachment 64512
--> https://bugs.freedesktop.org/attachment.cgi?id=64512
dmesg with drm.debug=6
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* [Bug 52345] KMS Power Management have no effect
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From: bugzilla-daemon @ 2012-07-23 5:08 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=52345
--- Comment #10 from Amadeus <sha256sum@gmail.com> 2012-07-22 22:08:06 PDT ---
Very interesting!
What can you gather from the attached logs where I have booted with drm.debug=6
?
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[-- Attachment #1.1: Type: text/plain, Size: 805 bytes --]
https://bugs.freedesktop.org/show_bug.cgi?id=52345
Martin Peres <martin.peres@free.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |MOVED
Status|NEW |RESOLVED
--- Comment #12 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
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You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/284.
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