Ubuntu 11.04 - kworker processes?

M

musky

[H]ard|DCer of the Year 2012
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Dec 14, 2009
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I am sure others are seeing this as well - anyone figured out how to stop these kworker processes from spawning? This is the 2.6.38-8-generic-ck kernel. I think it is a kernel issue, so you will probably upgrade into the problem if you are running 11.04, if you haven't already.

Code: 
 1215 dave       1  13 2760m 1.4g 3116 S 2375 23.5  25522:46 thekraken-FahCo
    5 root       1   0     0    0    0 R    3  0.0  16:23.89 kworker/u:0
   10 root       1   0     0    0    0 S    2  0.0   6:27.03 kworker/0:1
   38 root       1   0     0    0    0 S    1  0.0   5:39.12 kworker/9:1
   67 root       1   0     0    0    0 S    1  0.0   5:28.70 kworker/18:1
  310 root       1   0     0    0    0 S    1  0.0   5:31.60 kworker/20:1
  311 root       1   0     0    0    0 S    1  0.0   5:31.04 kworker/11:1
  315 root       1   0     0    0    0 S    1  0.0   5:55.77 kworker/2:1
  355 root       1   0     0    0    0 S    1  0.0   5:47.67 kworker/4:1
  410 root       1   0     0    0    0 S    1  0.0   5:41.03 kworker/22:1
  411 root       1   0     0    0    0 S    1  0.0   5:50.21 kworker/16:1
  508 root       1   0     0    0    0 S    1  0.0   5:32.42 kworker/23:1
  518 root       1   0     0    0    0 S    1  0.0   5:42.49 kworker/14:1
  519 root       1   0     0    0    0 S    1  0.0   5:46.57 kworker/15:1
  520 root       1   0     0    0    0 S    1  0.0   5:36.51 kworker/17:1
  521 root       1   0     0    0    0 S    1  0.0   5:45.91 kworker/13:1
  523 root       1   0     0    0    0 S    1  0.0   5:34.39 kworker/21:1
 
My SR-2 locked because of this. I just rebooted and it came up with 20+ kworkers. Seems to be something about ACPI Interupts. I am going to try 2.6.39 kernel seems to have helped a person on the Ubuntu forum. Source

I first noticed a problem when I was not able to do anything once I SSH'd into the box.
 
ouch. Very glad I decided to skip upgrading to 11.04. Thanks for the warning.
 
I guess we will be waiting for the 2.6.39 kernel with BFS, though. I just updated kernels a couple days ago and get the 2.6.38-8 kernel with BFS support.

FYI, 10.04 also doesn't work. It may be something with the implementation of BFS in the 2.6.30 kernel, but FAH would hang the system almost immediately. Upgrading to 10.10 with the 2.6.32 kernel seemed to fix that much. I still have that stupid pciehpd deamon running, but it is not taking up that many resources for now. My frame times are at least close to where they should be now,
 
Well with 2.6.39 I still have all the kworkers, but I can still SSH into the box and FAH is running fine. Yesterday the system was so slow I couldn't even SSH into it.

Code: 
[19:47:23] Completed 125000 out of 250000 steps  (50%)
[19:59:02] Completed 127500 out of 250000 steps  (51%)
[20:10:42] Completed 130000 out of 250000 steps  (52%)
[20:22:21] Completed 132500 out of 250000 steps  (53%)

~11:40min TPF on a 6901 with kraken 24cores @ 3.5GHz
 
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