[TAG] using smp kernel, get 100% cpu usage one one cpu without any real load on the system
leisner at rochester.rr.com
Tue Oct 9 08:26:59 MSD 2007
jim ruxton <cinetron at passport.ca> writes on Mon, 08 Oct 2007 14:21:21 EDT
> Hi I'm on a P4 running an smp kernel ie.
> uname -a :
> Linux jims-laptop 2.6.20-16-386 #2 Sun Sep 23 19:47:10 UTC 2007 i686
> For some reason occasionaly one of my cpu's runs away and starts showing
> 100% cpu usage, however top only shows the program using the most cpu at
> 7% or less. Where is that 93% going? This is driving me crazy. I have to
> reboot the machine to get it back to normal. I've tried Fedora and
> Kubuntu. Though Kubuntu appeared more stable it still happened. Played
> around with changing max_cstate without success.I've just downgraded to
> a 386 kernel to see if that helps. This isn't a real solution however.
> Do you have any suggestions? I've asked around on forums and irc
> channels without luck. Thanks.
> output of cat /proc/cpuinfo :
top also reports kernel, idle, user and a few others...
Are you 100% user? Is the system sluggish?
What type of load average are you seeing?
Also, if you're SMP there's an option in top to display each CPU (in recent procps tops, type 1).
[tops a lovely program -- there's been so many flavors since Bill Lefebvre version -- all slightly different...
Have you also run other load monitors as a sanity check?
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