Longshot: Dramatic CPU usage after installing XCode 2.3?
Longshot: Dramatic CPU usage after installing XCode 2.3?
- Subject: Longshot: Dramatic CPU usage after installing XCode 2.3?
- From: Rick Mann <email@hidden>
- Date: Fri, 2 Jun 2006 13:35:25 -0700
Yesterday afternoon my 2.0 GHz MacBookPro began exhibiting an
interesting behavior. Something starts using significant CPU
resources. At first I thought it was something triggered by XCode
2.3, because that was the only change I made to my system.
However, I've now seen it happen without ever launching XCode, so
it's not the app that's directly to blame. It might be the CHUD tools
(which I had installed previously, and again from the XCode 2.3
distro), although I haven't actually used them yet.
Here's the symptom: the computer reports about 60% CPU use, the
temperature goes up, and the fans slowly ramp up (one of them, at
least). However, neither top nor Activity Monitor shows any
particular process using more than a few % of the CPU. Most of them
are 0%, and one or two are at 1-3%. The core monitors show the top
CPU (in the horizontal chart) at about 10%, and the bottom CPU at
about 50%. Mostly user process.
Once the problem got worse: both CPUs pegged out at close to 100%,
and BOTH fans ramped up to full. It was fairly disconcerting to hear.
Significantly, the kernel_task in this situation reported 40% CPU use
(via ActivityMonitor). CoreDuoTemp reports 81 C when it gets bad
(usually it's in the mid-50s).
I've tried experimenting to see what app triggers this behavior, and
have been able to detect no discernible pattern. The apps I typically
run are: Finder, AdiumX, Mail, Safari, XCode, Terminal, Hardware
Growler, Activity Monitor, CoreDuoTemp, X Resource Graph, Retrospect.
I have trimmed this list down to various subsets, and nothing stands
out as the obvious culprit. My gut is pointing to Mail (I think it's
one app that's always been around when the behavior manifests), but
there's no load reported for it by top or AM.
Even more noteworthy is that logging out is insufficient to stop the
load. I have to restart to get it to stop. Sometimes it starts a few
minutes after reboot, sometimes not for hours. It does seem
inevitable, however.
There is no corresponding I/O spike.
Again, I bring it up on this list because the only change I made
(save actually catching a--gasp!--virus) was to install XCode 2.3.
If anyone can speculate, or think of things to try, I'd appreciate
it. Thanks!
--
Rick
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