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Old 03-23-09, 03:27 AM   #61
niczar
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Default Re: Huge slowdown after 2 min in 3D games with >3GB RAM and Memory Remap Enabled

Not just on 8800, I have it happen on a 8600GT (PCIe)
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Old 03-23-09, 02:15 PM   #62
sadtherobot
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Default Re: Huge slowdown after 2 min in 3D games with >3GB RAM and Memory Remap Enabled

As Dragoran stated, the problem seems to be on any GPU that is G80 or newer. I've also had this problem on every driver I've tried, on several types of cards and platforms.
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Old 03-25-09, 01:58 PM   #63
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Default Re: Huge slowdown after 2 min in 3D games with >3GB RAM and Memory Remap Enabled

For comparison I add a nvidia bug report log from a 32bit fedora 10 linux kernel with pae support and more than 4GB ram. Here the glxgears (32bit) run without any problems (at least 15min). It is exactly the same machine as in comment http://www.nvnews.net/vbulletin/show...6&postcount=52 , only the OS installation (i386 vs x86_64) and driver version differ. But I could confirm the problem is still there on 64bit with driver 185.13.

Attachment 1: the nvidia bug report after the run of 32bit glxgears on a 32bit pae kernel and without triggering the bug.
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Old 03-25-09, 02:01 PM   #64
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Default Re: Huge slowdown after 2 min in 3D games with >3GB RAM and Memory Remap Enabled

Attachment to previous comment.
Attached Files
File Type: bz2 nvidia-bug-report.log.bz2 (31.0 KB, 99 views)
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Old 03-25-09, 04:24 PM   #65
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Default Re: Huge slowdown after 2 min in 3D games with >3GB RAM and Memory Remap Enabled

Same problem here on half a dozen games and 3D applications I tested.

I think it might be a Wine and >3GB RAM type of issue since the problems occur only with games that run through Wine. Benchmarks like 3DMark 2001 and 2003 randomly slow down after 30 to 60 seconds. Fps count will go from 600-700 to 100-150 in seconds and then down to 1-2 fps and then it pretty much stops. (process freezes and I have to terminate it.)

I have 64bit OS (linux of course), 6GB of RAM, i7 CPU on a X58 platform. Also, I got two GTX 280 video cards running in SLI.

Problem summary: pretty much any game or 3D app running via "Wine" is not usable for more than a minute.
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Old 03-25-09, 09:27 PM   #66
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Default Re: Huge slowdown after 2 min in 3D games with >3GB RAM and Memory Remap Enabled

Quote:
Originally Posted by AssaultDrone View Post
Same problem here on half a dozen games and 3D applications I tested.

I think it might be a Wine and >3GB RAM type of issue since the problems occur only with games that run through Wine. Benchmarks like 3DMark 2001 and 2003 randomly slow down after 30 to 60 seconds. Fps count will go from 600-700 to 100-150 in seconds and then down to 1-2 fps and then it pretty much stops. (process freezes and I have to terminate it.)

I have 64bit OS (linux of course), 6GB of RAM, i7 CPU on a X58 platform. Also, I got two GTX 280 video cards running in SLI.

Problem summary: pretty much any game or 3D app running via "Wine" is not usable for more than a minute.
It can't be a wine specific issue because it's also reproducible with a 32bit glxgears as well as 32bit games not run through wine (such as enemy territory). If it's only happening in wine for you, consider yourself half lucky, and half pooched ;D
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Old 03-26-09, 02:09 PM   #67
AssaultDrone
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Default Re: Huge slowdown after 2 min in 3D games with >3GB RAM and Memory Remap Enabled

I've tried the "nopat" kernel flag and it didn't do anything for the slow down issue. Also, I tried the the NVreg_UsePageAttributeTable=0 setting for nVidia drivers and that didn't help either.

Is it a kernel issue, a wine issue, a nVidia driver issue, or some combination of all three of them? Or none of them? At first I thought it was a KDE 4.2 issue but even with plasma and desktop composition disabled the slow downs continue.

This definitely feels like a memory leak or a memory mis-management of some sort due to how the problem manifests itself. Completely random yet sudden and show-stopping performance hit.
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Old 03-30-09, 06:16 PM   #68
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Default Re: Huge slowdown after 2 min in 3D games with >3GB RAM and Memory Remap Enabled

It seems like the slowdown is fixed for me in 180.44. I had to pass MEM=3G to the kernel boot parameters to successfully play WoW, otherwise the game would slow down after 5-10 min and eventually crash.

How about for others?

x86_64, 2.6.28.9, Ubuntu
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Old 03-30-09, 09:14 PM   #69
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Default Re: Huge slowdown after 2 min in 3D games with >3GB RAM and Memory Remap Enabled

Not only is the memory leak gone for me (after extensive testing to confirm), but I've noticed that my 3d performance has just about doubled. Whatever was broken, 180.44 seems to have done the trick.
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Old 03-31-09, 11:00 AM   #70
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Default Re: Huge slowdown after 2 min in 3D games with >3GB RAM and Memory Remap Enabled

180.44 fixes the problem for me too. Good job! The crashs I experienced with World of Warcraft + wine after some time seem to be gone too.
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Old 03-31-09, 12:01 PM   #71
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Default Re: Huge slowdown after 2 min in 3D games with >3GB RAM and Memory Remap Enabled

Now please apply the fix to the 185.* branch to make sure it wont come back in future releases
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Old 04-03-09, 11:27 AM   #72
AssaultDrone
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Default Re: Huge slowdown after 2 min in 3D games with >3GB RAM and Memory Remap Enabled

I can confirm this. With 180.44 drivers the stuttering issues seems to be gone. In addition in single GPU situations the fps has increased by anywhere from 20% to 30%.
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