[Eug-lug] ubuntu xterm strangeness

[Garl Grigsby]

On Dec 10, 2007 12:14 PM, Mike Cherba <mike.cherba at caviumnetworks.com>
wrote:

> I'm curious if anyone else has run across this issue before.
>
> I noticed this when I was booting a system attached to a USB serial
> device, but eventually localized the issue to xterm itself.  Basically
> when you put a lot of text through an xterm the cpu usage on gutsy goes
> way up.  like 100%.  I've tried the same thing with the generic terminal
> app gnome-terminal and the cpu usage is much lower.  This seems odd.
> I'm wondering if there is something broken or at least terribly
> sub-optimal in one of the libraries used.
>
> I'm running KDE and can reproduce this symptom at will simply by running
> "du -ah /" in the two different terminals. (xterm & gnome-terminal)


Mike,
   Can't say I've run into this before, but I rarely use xterm. I usually
use gnome-term as I like the tabs. I just tested this on my gutsy laptop,
but I'm not running KDE. Here is what I see in top when I do it. High usage
yes, but no max CPU.

Garl

Tasks: 115 total,   5 running, 110 sleeping,   0 stopped,   0 zombie
Cpu(s): 76.5%us, 21.6%sy,  2.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,
0.0%st
Mem:   1295636k total,   769040k used,   526596k free,   156940k buffers
Swap:  2000052k total,        0k used,  2000052k free,   306332k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+
COMMAND
 3955 root      16   0  7948 5312  616 S 35.7  0.4   0:24.38 mount.ntfs

 5586 grigsby   15   0 10300 4164 2484 S 28.8  0.3   0:43.21xterm
 5121 root      25   0  182m  33m  11m R 25.8  2.7   1:14.70Xorg
 6058 root      15   0  4208 2024  580 R  6.9  0.2   0:00.51du
 5630 grigsby   15   0 89148  21m  11m S  2.0  1.7   0:02.80gnome-terminal
 6047 grigsby   37  19 19192  15m  12m R  1.0  1.2   0:01.04apt-check
    1 root      18   0  2952 1856  532 S  0.0  0.1   0:01.40init
    2 root      10  -5     0    0    0 S  0.0  0.0   0:00.00kthreadd
    3 root      RT  -5     0    0    0 S  0.0  0.0   0:00.00migration/0
    4 root      34  19     0    0    0 S  0.0  0.0   0:00.00ksoftirqd/0
    5 root      RT  -5     0    0    0 S  0.0  0.0   0:00.00watchdog/0
    6 root      10  -5     0    0    0 S  0.0  0.0   0:00.01events/0
    7 root      10  -5     0    0    0 S  0.0  0.0   0:00.00khelper
   26 root      10  -5     0    0    0 S  0.0  0.0   0:00.02kblockd/0
   27 root      10  -5     0    0    0 S  0.0  0.0   0:00.00kacpid
   28 root      10  -5     0    0    0 S  0.0  0.0   0:00.00kacpi_notify
  139 root      10  -5     0    0    0 S  0.0  0.0   0:00.02kseriod
root at karma:~#
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