What's the deal with 'top' ?

[Marcus White]

Yes, this is a known issue and has been reported in bugzilla, at least
according to earlier posts.


 On Sun, 2003-10-26 at 18:42, Cowles, Steve wrote:
> I'm running a fully patched Fedora system on a single P4/1.7G with 256MB of
> RAM.
> 
> I was using the command "top" to view processes and noticed that it showed
> my CPU was 0.0% idle when I started X (gnome). But yet no process(s) were
> consuming 100% of the CPU (see below). Lot of RAM though, especially the X
> process. The odd part is if I stop X (logout), top shows 99.0% free. 
> 
> Also, if I use the X based 'system monitor' command, it seems to correctly
> display the CPU utilization. Which is like 2% utilization when idle.
> 
> Is anyone else seeing this behavior? Seems unique to the nptl based kernels
> only. I don't see this on my RH-9 system.
> 
> Steve Cowles
> 
> ----------------------------------------------------
> 
> # grep "Linux version" /var/log/messages
> Oct 26 06:51:00 enterprise kernel: Linux version 2.4.22-1.2108.nptl
> 
> # grep CPU: /var/log/messages
> Oct 26 06:51:03 enterprise kernel: CPU: Trace cache: 12K uops, L1 D cache:
> 8K 
> Oct 26 06:51:03 enterprise kernel: CPU: L2 cache: 256K 
> Oct 26 06:51:03 enterprise kernel: CPU: Intel(R) Pentium(R) 4 CPU 1.70GHz
> stepping 03
> 
> # cat top.x (with X running)
>  16:59:46  up 5 min,  5 users,  load average: 0.67, 0.46, 0.20
> 71 processes: 69 sleeping, 2 running, 0 zombie, 0 stopped
> CPU states:  cpu    user    nice  system    irq  softirq  iowait    idle
>            total    0.0%    0.0%    0.0%  33.6%    34.0%   32.3%    0.0%
> Mem:   255500k av,  197528k used,   57972k free,       0k shrd,   11056k
> buff
>         48968k active,             127676k inactive
> Swap:  265064k av,       0k used,  265064k free                   89456k
> cached
>  
>   PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME CPU COMMAND
>  1099 root      15   0  275M  19M  7232 S     0.0  7.7   0:01   0 X
>  1251 scowles   16   0 21076  20M  1980 S     0.0  8.2   0:00   0 gconfd-2
>  1288 scowles   16   0 16804  16M  9924 S     0.0  6.5   0:01   0 nautilus
>  1299 scowles   16   0 10536  10M  8108 S     0.0  4.1   0:00   0
> gnome-panel
>  1308 scowles   15   0 13264  12M  7772 S     0.0  5.1   0:00   0
> gnome-termina
>  1324 scowles   25  10 13500  13M  8884 S N   0.0  5.2   0:00   0
> rhn-applet-gu
> 
> # cat top.no_x (no X running)
>  16:57:11  up 2 min,  1 user,  load average: 0.49, 0.34, 0.13
> 47 processes: 46 sleeping, 1 running, 0 zombie, 0 stopped
> CPU states:  cpu    user    nice  system    irq  softirq  iowait    idle
>            total    0.0%    0.0%    0.9%   0.0%     0.0%    0.0%   99.0%
> Mem:   255500k av,   97752k used,  157748k free,       0k shrd,    7232k
> buff
>         30768k active,              52148k inactive
> Swap:  265064k av,       0k used,  265064k free                   56164k
> cached
>  
>   PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME CPU COMMAND
>  1182 scowles   16   0  1048 1048   888 R     0.9  0.4   0:00   0 top
>     1 root      16   0   424  424   364 S     0.0  0.1   0:04   0 init
>     2 root      15   0     0    0     0 SW    0.0  0.0   0:00   0 keventd
> 
> 
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-- 
Marcus White <1midniterider at comcast.net>