Messages in this thread | | | Date | Thu, 7 Sep 2006 17:53:23 -0700 | From | Andrew Morton <> | Subject | Re: top displaying 50% si time and 50% idle on idle machine |
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On Thu, 7 Sep 2006 20:08:53 +0200 "Metathronius Galabant" <m.galabant@googlemail.com> wrote:
> Hi, > > Kernel 2.6.17.11 with tg3 network driver, NAPI enabled (Distro CentOS 4.4). > top shows strangely 50% idle even if the machine is _completely_ idle. > > top - 01:04:30 up 4 days, 12:05, 2 users, load average: 0.00, 0.00, 0.00 > Tasks: 34 total, 2 running, 32 sleeping, 0 stopped, 0 zombie > Cpu(s): 0.0% us, 0.0% sy, 0.0% ni, 50.0% id, 0.0% wa, 0.0% hi, 50.0% si > Mem: 3634452k total, 313284k used, 3321168k free, 71308k buffers > Swap: 505896k total, 0k used, 505896k free, 220272k cached > > I find this pretty alarming - can somebody please enlighten me? > Please include me on CC.
Do `ps aux', look for a process stuck in D state.
Do
echo t > /proc/sysrq-trigger dmesg -s 1000000 > foo
then edit foo, search for the process in D state (look for " D ") and send that process's backtrace record.
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