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Old 11-08-2010, 09:58 PM   #1
dreamtale
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event/0 takes up 97%cpu time


when i used top command: i found the event/0 process took too much cpu time,at the same time ,the si took up 7.8%cpu time:
Tasks: 161 total, 6 running, 155 sleeping, 0 stopped, 0 zombie
Cpu0 : 0.0%us, 90.3%sy, 0.0%ni, 1.9%id, 0.0%wa, 0.0%hi, 7.8%si, 0.0%st
Cpu1 : 11.5%us, 3.8%sy, 0.0%ni, 82.7%id, 0.0%wa, 0.0%hi, 1.9%si, 0.0%st
Cpu2 : 9.5%us, 2.9%sy, 0.0%ni, 84.8%id, 0.0%wa, 0.0%hi, 2.9%si, 0.0%st
Cpu3 : 13.6%us, 1.9%sy, 0.0%ni, 83.5%id, 0.0%wa, 0.0%hi, 1.0%si, 0.0%st
Cpu4 : 13.3%us, 2.9%sy, 0.0%ni, 81.9%id, 0.0%wa, 1.0%hi, 1.0%si, 0.0%st
Cpu5 : 2.9%us, 0.0%sy, 0.0%ni, 95.1%id, 0.0%wa, 0.0%hi, 1.9%si, 0.0%st
Cpu6 : 6.7%us, 1.0%sy, 0.0%ni, 90.4%id, 0.0%wa, 1.0%hi, 1.0%si, 0.0%st
Cpu7 : 16.5%us, 3.9%sy, 0.0%ni, 78.6%id, 0.0%wa, 0.0%hi, 1.0%si, 0.0%st
Cpu8 : 2.0%us, 2.9%sy, 0.0%ni, 95.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu9 : 9.7%us, 1.9%sy, 0.0%ni, 87.4%id, 0.0%wa, 0.0%hi, 1.0%si, 0.0%st
Cpu10 : 3.9%us, 0.0%sy, 0.0%ni, 95.1%id, 0.0%wa, 0.0%hi, 1.0%si, 0.0%st
Cpu11 : 8.7%us, 2.9%sy, 0.0%ni, 88.5%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu12 : 9.5%us, 5.7%sy, 0.0%ni, 83.8%id, 0.0%wa, 0.0%hi, 1.0%si, 0.0%st
Cpu13 : 25.0%us, 0.0%sy, 0.0%ni, 50.0%id, 0.0%wa, 25.0%hi, 0.0%si, 0.0%st
Cpu14 : 7.6%us, 5.7%sy, 0.0%ni, 83.8%id, 0.0%wa, 0.0%hi, 2.9%si, 0.0%st
Cpu15 : 9.6%us, 2.9%sy, 0.0%ni, 86.5%id, 0.0%wa, 0.0%hi, 1.0%si, 0.0%st
Mem: 8272128k total, 1908032k used, 6364096k free, 0k buffers
Swap: 0k total, 0k used, 0k free, 1328896k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
6205 wisg 20 0 1318m 334m 17m S 268 4.1 42:04.22 wisg_parser
35 root 15 -5 0 0 0 R 97 0.0 178:31.89 events/0
3423 root 39 19 0 0 0 S 4 0.0 15:28.67 bsirqd/5
Does anyone have the same problem? Waiting on line
 
Old 11-09-2010, 03:50 PM   #2
MensaWater
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This thread has some good information - it looks like it could be a Wifi or LAN card based on what folks posted there:
http://www.linuxquestions.org/questi...-usage-441837/
 
Old 11-09-2010, 03:51 PM   #3
paulsm4
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Hi -

Quote:
events/0 process usage

In a 2.6 kernel, events/cpu_number is a mechanism (it replaces the old keventd) for handling low-level requests that need to run asynchronously. All sorts of notifications run through there ... it's very ad hoc. So if you're seeing this "pegging the meter," all it's really telling you is that there's a loop somewhere.
The culprit in this particular case was a LAN driver:
Quote:
Finally I have managed to fix the problem. I went into the bios and disabled all of the hardware on my laptop and it worked. I gradually re-enabled things (USB, WLAN, etc) until it happened again...the culprit is my LAN card, which uses the sky2 module.
 
Old 11-09-2010, 03:53 PM   #4
MensaWater
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Quote:
Originally Posted by paulsm4 View Post
Hi -



The culprit in this particular case was a LAN driver:
Hah! Beat you to it.
 
Old 11-09-2010, 06:04 PM   #5
paulsm4
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That's just because I needed to type longer to give a better explanation

ANYWAY...

dreamtale -
One other culprit might be a conflict between ACPI and a driver. So one other alternative might be to disable ACPI ("acpi=off") in your grub startup (e.g. "/boot/grub/menu.lst"):

https://bugs.launchpad.net/ubuntu/+s...nux/+bug/67126

Last edited by paulsm4; 11-09-2010 at 06:06 PM.
 
  


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