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delta407
Bodhisattva
Bodhisattva


Joined: 23 Apr 2002
Posts: 2876
Location: Chicago, IL

PostPosted: Tue Jul 02, 2002 3:06 am    Post subject: top idle b0rked Reply with quote

I noticed this three times on a fresh install; top reports... erm, interesting idle times occasionally. I was lucky enough to capture it once:


Code:
30 processes: 28 sleeping, 2 running, 0 zombie, 0 stopped
CPU states: 67.2% user, 32.7% system,  0.0% nice, 213786.2% idle
Mem:   255836K av,  252384K used,    3452K free,       0K shrd,   30980K buff
Swap:  530136K av,     152K used,  529984K free                  192816K cached

  PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME COMMAND
28882 root      25   0  4020 4020   364 R    66.1  1.5   0:58 bzip2
28883 root      15   0   804  804   688 S    31.7  0.3   0:06 tar
    4 root      15   0     0    0     0 SW    1.0  0.0   0:04 kswapd
28881 root      15   0   368  368   304 S     0.4  0.1   0:00 cat
28887 root      15   0   972  972   776 R     0.4  0.3   0:00 top
    1 root      15   0   496  496   420 S     0.0  0.1   0:04 init
    2 root      15   0     0    0     0 SW    0.0  0.0   0:00 keventd
    3 root      34  19     0    0     0 SWN   0.0  0.0   0:00 ksoftirqd_CPU0
    5 root      15   0     0    0     0 DW    0.0  0.0   0:00 bdflush
    6 root      15   0     0    0     0 DW    0.0  0.0   0:02 kupdated
    8 root      16   0     0    0     0 SW    0.0  0.0   0:00 khubd
    9 root      15   0     0    0     0 SW    0.0  0.0   0:00 kreiserfsd
   26 root      15   0   716  688   592 S     0.0  0.2   0:00 devfsd
  991 root      15   0   472  460   408 S     0.0  0.1   0:00 dhcpcd
...


All three times it was in six digits; once it was 61----.-% (it went fast, okay?), once 24----.-%, and once 213786.2%, no apparent connection to anything I was doing.
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klieber
Administrator
Administrator


Joined: 17 Apr 2002
Posts: 3657
Location: San Francisco, CA

PostPosted: Tue Jul 02, 2002 1:39 pm    Post subject: Reply with quote

Moving this to general linux since it doesn't appear to be Gentoo-specific.

My guess is it has something to do with the low-latency or pre-empt patch in the kernel. Might find the top web site and see if there's any discussion of it there.

--kurt
_________________
The problem with political jokes is that they get elected
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ste
n00b
n00b


Joined: 19 Jun 2002
Posts: 4
Location: France/Compiegne

PostPosted: Tue Jul 30, 2002 11:21 pm    Post subject: hey, it's true Reply with quote

I have exactly the same bug... (not realy a huge problem, but realy strange when you see it for the first time). And I also use gentoo 2.4.19 with premtive + low latency.

Code:

  1:10am  up  7:00,  4 users,  load average: 1.06, 1.14, 1.30
62 processes: 58 sleeping, 4 running, 0 zombie, 0 stopped
CPU states: 90.6% user,  9.5% system,  0.0% nice, 935722.5% idle
Mem:   255972K av,  251100K used,    4872K free,       0K shrd,    7956K buff
Swap:  248968K av,   36316K used,  212652K free                  121160K cached

  PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME COMMAND
  650 root      25   0 12952  12M  2780 R    89.2  5.0   0:02 cc1
  634 root      15   0   908  908   736 R     8.9  0.3   0:00 top
 8931 root      15   0 96292  23M  3184 S     0.8  9.2   9:19 X
 9010 ste       15   0 77908 9.8M  9568 S     0.4  3.9   0:50 kdeinit
 9038 ste       15   0 78292  10M  9916 R     0.4  4.1   0:25 kdeinit
    1 root      15   0   508  460   440 S     0.0  0.1   0:04 init

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