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Old 04-14-09, 09:04 AM   #1
WendelDRenner
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Question loss of graphics performance after some time in new windows

We are having a problem on ubuntu systems with nvidia graphics cards. We have seen this now on our development system with Dapper Drake with an nvidia quadro fx 560, and on Hardy Heron with nvidia quadro fx 570 and nvidia quadro fx 3700. The application was developed a decade ago on SGI IRIX and from 2004 to 2006 on redhat linux. The problem we see is a sudden loss of graphics performance, such as the displaying of an image after some exercise of the program displaying images. Existing windows continue to display as they had before. But in a new window the graphics is real slow. You can watch the system draw the image from the bottom up (using an Open GL call). If we restart the application all new windows continue to draw slowly. We have to reboot the computer to restore the prior graphics performance but once again after a short time the problem reoccurs. It is as if hardware acceleration is turned off or something. I donít know where to begin to figure out what is happening. The program displays medical CT scans.
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Old 04-15-09, 10:04 AM   #2
JaXXoN
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Default Re: loss of graphics performance after some time in new windows

Please provide an "nvidia-bug-report.log": when the system gets into the
"low-speed state", open a terminal window, login as root and type
"nvidia-bug-report.sh" this will generate a whole lot of information that
could be helpful to track down the problem, i.e. if you see any "XID"
messages in the kernel log or "WAIT" messages in the xorg.log, then
there is some sort of hardware issue that you typically can't fix in your
application software, but may be fixable with PC/VGA BIOS updates
and or specific kernel and/or Xorg options.

Does the problem also occur with other nvidia cards (GF) or HW combos?

BTW.: in which "Performance Level" is the card when the problem occurs?
(Execute "nvidia-setting" and check "PowerMizer" underneath "GPU 0")

regards

Bernhard
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Old 04-15-09, 11:20 AM   #3
WendelDRenner
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Default Re: loss of graphics performance after some time in new windows

(1) I don't see anyway to attach a file to a message in this forum.
The log file I have is 139008 bytes long.
(2) I would really like to find a consultant for these kinds of problems.
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Old 04-15-09, 11:23 AM   #4
WendelDRenner
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Default Re: loss of graphics performance after some time in new windows

OK, I found a way to attach the log file.
Attached Files
File Type: log nvidia-bug-report.log (135.8 KB, 79 views)
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Old 04-15-09, 11:44 AM   #5
JaXXoN
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Default Re: loss of graphics performance after some time in new windows

I couldn't see any obvious issues in the bug report log.

Please try out the following things:

1.) Remove the FX3400 and check if the problem still occurs when
there's only the FX3500.

2.) Disable any power saving features in the PC BIOS setup.

3.) Once apon a time, it was necessary to add the following
kernel options to get certain AMD based multi-CPU/multi-GPU
systems working stable: "idle=poll pci=conf1". However, i don't
know if this is still helpful nowerdays, but trying it out won't hurt.

regards

Bernhard
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Old 04-15-09, 11:58 AM   #6
JaXXoN
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Default Re: loss of graphics performance after some time in new windows

BTW.: here's a bunch of other AMD64 specific kernel options you
could play around with:

http://os.cqu.edu.au/docs/kernel-doc...ot-options.txt

In many past cases, one or a combination of the following options have
been helpful with stability issues: notsc noapic nolapic noacpi nosmp.

The basic idea is that if you can figure out under which circumstances
your system works stable, then it is probably easier to find a solution.

regards

Bernhard
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Old 04-15-09, 12:03 PM   #7
WendelDRenner
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Default Re: loss of graphics performance after some time in new windows

there is an nvidia quadro fx 3700 in this computer running under HardyHeron.
So I have no idea what you mean by remove the fx3400 and see what happens
if there is only the fx3500. However, my 2.5 year old DrapperDrake system
with an nvidia quadro fx 560 shows the same problem, and we have seen
the same problem with an nvidia quadro fx 570. This has occurred on every
compute we have loaded the application under ubuntu linux. Before,
developing with redhat linux I never saw this nor before on SGI IRIX for the
same code. So I don't see how it could be the application.
It was only this week
we figured out how to consistently create the problem, and of course
when we now need to ship a computer to a customer with our application.
The program also is compiled and linked to run under Windows with Humminbird's
X server Exceed (and runs fine), but we want to switch to linux. This is stopping us.
I'll check the power savings if I can figure out how.
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Old 04-15-09, 12:15 PM   #8
WendelDRenner
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Default Re: loss of graphics performance after some time in new windows

nvidia-settings

No change in settings
Performance level stays at 1, maximum performance, nv clock 500 mhz,
memory clock 800

Well, then it changed to performance leve 0, still says maximum performance,
but clocks are 300 and 100 respectively.

core temperature bouncing around between 37 and 41 degrees.

However, the older windows still draw really fast, and the newly created draw really
slow. Same exact function displaying some images. But 2d image is slow and 3d shaded
room view becomes slow.

If I back out of the program and restart, all windows draw slow. Only rebooting gets
it back. Isn't there some company or persons I can send this computer to?
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Old 04-15-09, 12:43 PM   #9
JaXXoN
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Default Re: loss of graphics performance after some time in new windows

Quote:
Originally Posted by WendelDRenner View Post
So I have no idea what you mean by remove the fx3400 and see what happens
if there is only the fx3500.
Ooops, my fault: i saved your nvidia-bug-report.log, but there was already one in
my download directory so Seamonkey renamed yours to "nvidia-bug-report-1.log"
and then i was reading the old one :-)

Anyway, couldn't find anything suspicious in the right log, either ...

Bernhard
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Old 04-15-09, 12:56 PM   #10
JaXXoN
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Default Re: loss of graphics performance after some time in new windows

Quote:
Originally Posted by WendelDRenner View Post
If I back out of the program and restart, all windows draw slow. Only rebooting gets
it back.
Can you please check the CPU load once the system is in bad mood?
(i.e. using "top"). Also, it might be worth trying to apply the kernel options
listed above to check if it makes any difference.

Quote:
Originally Posted by WendelDRenner View Post
Isn't there some company or persons I can send this computer to?
In case the typical more or less known fixes (kernel and xorg options, bios and
driver updates, etc.) do not apply then i fear there is little somebody except
nvidia personal could do ...

Maybe it helps if you could publish a feature and time limited binary only demo
version of your application along with instructions on how to reproduce the problem
so that a range of nvidia linux users could try it out and report their results?

If this is not possible, then i suggest filing a detailed bug report to nvidia, offering
to provide an application binary to the nvidia linux driver developers so that they
can try to reproduce the problem, potentially fixing it in the driver code.

regards

Bernhard
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Old 04-15-09, 01:09 PM   #11
JaXXoN
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Default Re: loss of graphics performance after some time in new windows

Quote:
Originally Posted by WendelDRenner View Post
Performance level stays at 1, maximum performance, nv clock 500 mhz,
memory clock 800

Well, then it changed to performance leve 0, still says maximum performance,
but clocks are 300 and 100 respectively.
Do i understand it correctly that the PerfLevel dropped to 0 although
there is some 3D application running?

Maybe it's worth playing around with this xorg.conf option:

Code:
Option "RegistryDwords" "PowerMizerEnable=0x1; PerfLevelSrc=0x2222"
I have also seen these options:

Code:
Option "RegistryDwords" "PowerMizerLevelAC=0x3"
Option "RegistryDwords" "PowerMizerLevel=0x3"
Unfortunately, i couldn't find easily find any documentation concerning
"RegistryDwords" parameters.

regards

Bernhard
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Old 04-15-09, 01:10 PM   #12
WendelDRenner
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Default Re: loss of graphics performance after some time in new windows

One of the computers has an AMD board. The other is not, it is an Intel i7
Prior to that we used something from DELL that was a 32 bit system. Same problem
occurred.
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