* [Bug 33512] New: radeon: lots of time spent in atombios_crtc_disable
@ 2011-04-17 20:41 bugzilla-daemon
2011-04-17 20:45 ` [Bug 33512] " bugzilla-daemon
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: bugzilla-daemon @ 2011-04-17 20:41 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=33512
Summary: radeon: lots of time spent in atombios_crtc_disable
Product: Drivers
Version: 2.5
Kernel Version: 2.6.39-rc3
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Video(DRI - non Intel)
AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
ReportedBy: edwintorok@gmail.com
Regression: No
Created an attachment (id=54532)
--> (https://bugzilla.kernel.org/attachment.cgi?id=54532)
dmesg
On a mostly idle system this is what I see with perf top (after exiting a
game):
---------------------------------------------------------------------------
PerfTop: 386 irqs/sec kernel:72.8% exact: 0.0% [1000Hz cycles],
(all, 6 CPUs)
---------------------------------------------------------------------------
samples pcnt function DSO
_______ _____ ______________________________
171.00 18.0% atombios_crtc_disable
/lib/modules/2.6.39-rc3-phenom-00117-ge38f5b7/kernel/drivers/gpu/drm/radeon/radeon.ko
47.00 4.9% find_next_bit [kernel.kallsyms]
31.00 3.3% format_decode [kernel.kallsyms]
When playing a game that function is still on top, albeit with a lower
percentage (7.5%).
If the function does what its name says then it should be called at most once,
when switching modes, entering standby, etc. I don't see why it is being called
during normal operation, and why is it called so many times that it makes it
the top function using the CPU...
The graphics in games is quite laggy too, maybe because of this...
My dmesg is attached.
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^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug 33512] radeon: lots of time spent in atombios_crtc_disable
2011-04-17 20:41 [Bug 33512] New: radeon: lots of time spent in atombios_crtc_disable bugzilla-daemon
@ 2011-04-17 20:45 ` bugzilla-daemon
2011-08-05 7:25 ` bugzilla-daemon
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2011-04-17 20:45 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=33512
--- Comment #1 from Török Edwin <edwintorok@gmail.com> 2011-04-17 20:45:53 ---
Created an attachment (id=54542)
--> (https://bugzilla.kernel.org/attachment.cgi?id=54542)
Xorg.0.log
Xorg log attached too
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^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug 33512] radeon: lots of time spent in atombios_crtc_disable
2011-04-17 20:41 [Bug 33512] New: radeon: lots of time spent in atombios_crtc_disable bugzilla-daemon
2011-04-17 20:45 ` [Bug 33512] " bugzilla-daemon
@ 2011-08-05 7:25 ` bugzilla-daemon
2011-08-05 13:52 ` bugzilla-daemon
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2011-08-05 7:25 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=33512
--- Comment #2 from Michel Dänzer <michel@daenzer.net> 2011-08-05 07:25:50 ---
My best guess is that it's page flipping related, but it would be good to
confirm that, e.g. by somehow triggering a backtrace from
atombios_crtc_disable.
It might also be interesting to add some debugging output to
atombios_crtc_disable to narrow down where it's spending so much time. But if
my assumption turns out to be true that it keeps getting called on page flips,
we might just need to somehow no-op repeated calls.
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^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug 33512] radeon: lots of time spent in atombios_crtc_disable
2011-04-17 20:41 [Bug 33512] New: radeon: lots of time spent in atombios_crtc_disable bugzilla-daemon
2011-04-17 20:45 ` [Bug 33512] " bugzilla-daemon
2011-08-05 7:25 ` bugzilla-daemon
@ 2011-08-05 13:52 ` bugzilla-daemon
2011-08-05 13:58 ` bugzilla-daemon
2012-08-20 15:50 ` bugzilla-daemon
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2011-08-05 13:52 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=33512
--- Comment #3 from Alex Deucher <alexdeucher@gmail.com> 2011-08-05 13:52:21 ---
The only places atombios_crtc_disable() called are from
drm_crtc_helper_set_config() and drm_helper_resume_force_mode(). I suspect
what is happening is that certain games cause GPU resets which call
radeon_gpu_reset() which in turn calls drm_helper_resume_force_mode(). I don't
think this is a kernel bug at all. I'd suggest trying a newer mesa if you are
using an older version. Try 7.11. Do you see GPU reset messages in your dmesg
output after running a problematic game?
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^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug 33512] radeon: lots of time spent in atombios_crtc_disable
2011-04-17 20:41 [Bug 33512] New: radeon: lots of time spent in atombios_crtc_disable bugzilla-daemon
` (2 preceding siblings ...)
2011-08-05 13:52 ` bugzilla-daemon
@ 2011-08-05 13:58 ` bugzilla-daemon
2012-08-20 15:50 ` bugzilla-daemon
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2011-08-05 13:58 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=33512
--- Comment #4 from Török Edwin <edwintorok@gmail.com> 2011-08-05 13:58:50 ---
(In reply to comment #3)
> The only places atombios_crtc_disable() called are from
> drm_crtc_helper_set_config() and drm_helper_resume_force_mode(). I suspect
> what is happening is that certain games cause GPU resets which call
> radeon_gpu_reset() which in turn calls drm_helper_resume_force_mode(). I don't
> think this is a kernel bug at all. I'd suggest trying a newer mesa if you are
> using an older version. Try 7.11.
I'm using git master now, and it works far better than 7.10 or 7.11.
> Do you see GPU reset messages in your dmesg
> output after running a problematic game?
I didn't look much at perf output lately, will have to try and see if this is
still an issue with latest mesa, and report back.
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^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug 33512] radeon: lots of time spent in atombios_crtc_disable
2011-04-17 20:41 [Bug 33512] New: radeon: lots of time spent in atombios_crtc_disable bugzilla-daemon
` (3 preceding siblings ...)
2011-08-05 13:58 ` bugzilla-daemon
@ 2012-08-20 15:50 ` bugzilla-daemon
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2012-08-20 15:50 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=33512
Alan <alan@lxorguk.ukuu.org.uk> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |alan@lxorguk.ukuu.org.uk
Resolution| |OBSOLETE
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2011-04-17 20:41 [Bug 33512] New: radeon: lots of time spent in atombios_crtc_disable bugzilla-daemon
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2011-08-05 7:25 ` bugzilla-daemon
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