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CPU Monitor pinned at 100%, but top shows nothing
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Mac Elite
Join Date: Feb 2001
Location: Canaduh
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Offline
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Okay, this is a new one.
CPU Monitor (as well as Cee Pee You and CPU Menu Meter) all show my CPU at a steady 100%. Yet, when I open up top in a terminal window, there are no processes taking up 100%. It's the normal 5-15% idle usage.
Is there some hidden process sucking up the CPU or are the CPU monitors somehow being fooled?
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Forum Regular
Join Date: Dec 2002
Status:
Offline
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Are the meters (or top) showing 100% system load or user load? (In MenuMeters to see this you need to turn on the "small text" display in the pref pane). You should see similar statistics near the beginning of top's report (top of top  ).
If its system time then top won't show the offending process because the process consuming all your CPU time is the kernel itself.
As to what might cause this, if you're machine is not paging like crazy then I would guess a driver has started acting up. I recall for a while there were reports that some USB printer drivers could cause the kernel to spin hard like this, but I don't have an immediate reference (sorry). Try a reboot without external devices attached and see if it goes away.
HTH,
Bas
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Mac Elite
Join Date: Feb 2001
Location: Canaduh
Status:
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Bas,
Thanks. The system is using 80%-90%. I have an external Firewire hard drive and a HP Deskjet.
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Junior Member
Join Date: Aug 2001
Location: Melbourne, Australia
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Offline
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you can also type "top -u" to show the tasks in order of CPU usage.
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Forum Regular
Join Date: Dec 2002
Status:
Offline
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I have an external Firewire hard drive and a HP Deskjet.
I can't find a direct reference, but people seem to have problems with the "HP Communications" part of the DeskJet driver. See for example this thread:
http://forums.macnn.com/showthread.p...deskjet+driver
You might hunt around the forums and MacFixIt to see if you can find a description of the problem and a recommended driver version.
Bas
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Fresh-Faced Recruit
Join Date: Aug 2003
Location: Chicago, IL
Status:
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I am having the exact same problem. It started yesterday. I do not have a printer attached to the Mac.
The only differences in my case - when I first sat down at the Mac yesterday the UI was almost completely unresponsive. At that time top reported my load averages as being approx. 25! After a reboot the UI is back, and the load is down to a steady 1.72 (still high), but the CPU is a steady 100%, with 85% of that going to system processes.
Any ideas?
Thanks,
Chris
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Mac Elite
Join Date: Aug 2002
Location: Kyoto, Japan
Status:
Offline
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Try booting up in single user mode and running top from there. Write down the CPU usage levels. Post the results.
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