From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 65761] HD 7970M Hybrid - hangs and errors and rmmod causes crash
Date: Sun, 02 Feb 2014 23:58:35 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=65761
--- Comment #30 from Christoph Haag ---
Created attachment 124221
--> https://bugzilla.kernel.org/attachment.cgi?id=124221&action=edit
sysprof with 2 xterm windows and kwin
I still kind of want to try the opposite direction, to find out what X does
that keeps the gpu awake so I'm trying to get a good dynamic call graph. The
first thing that kind of worked is sysprof...
So I started recording this after starting X and two xterms and kwin on the
intel gpu and just clicked a bit between the two because it seems this triggers
whatever happens. The radeon gpu was not even configured as offload slave, just
default X configuration.
If I saw that correctly none of the applications called functions from the
radeon driver which is probably good, but in X you can see this (more detail is
available in the file):
[/usr/bin/X] 0,00% 65,99%
In file [heap] 0,00% 29,73%
ioctl 0,18% 16,17%
- - kernel - - 0,00% 15,99%
system_call_fastpath 0,00% 15,99%
sys_ioctl 0,04% 15,99%
do_vfs_ioctl 0,00% 15,63%
radeon_drm_ioctl 0,11% 15,60%
drm_ioctl 0,43% 14,63%
__pm_runtime_suspend 0,00% 0,57%
__pm_runtime_resume 0,04% 0,14%
copy_user_enhanced_fast_string 0,07% 0,07%
irq_exit 0,00% 0,04%
_copy_from_user 0,04% 0,04%
drm_ioctl 0,04% 0,04%
fget_light 0,25% 0,25%
radeon_drm_ioctl 0,04% 0,04%
fput 0,04% 0,04%
I have only this GPU so I don't have any comparison to one where runpm works
correctly, whether it should be this active... Maybe it's interesting that
stuff like __pm_runtime_suspend and __pm_runtime_resume is called?
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