computer becomes slow when compiling something

Hi,

I'm running FreeBSD 7.0-CURRENT with SCHED_ULE, INVARIANTS, WITNESS 
enabled kernel.

daemon# uname -an
FreeBSD daemon.micom.mng.net 7.0-CURRENT FreeBSD 7.0-CURRENT #2: Thu Aug 
23 17:59:17 ULAT 2007     
tsgan_at_daemon.micom.mng.net:/usr/obj/usr/src/sys/GDAEMON  i386
daemon#

When compiling something (buildworld or making wine for example) inside 
from X/gnome
my computer becomes very slow.

top shows while compiling wine:

last pid: 38660;  load averages:  3.10,  2.24,  
1.33                                                                                 
up 3+02:07:05  12:11:38
106 processes: 3 running, 102 sleeping, 1 zombie
CPU states: 90.2% user,  0.0% nice,  9.8% system,  0.0% interrupt,  0.0% 
idle
Mem: 704M Active, 63M Inact, 168M Wired, 39M Cache, 111M Buf, 21M Free
Swap: 2048M Total, 195M Used, 1853M Free, 9% Inuse

  PID USERNAME    THR PRI NICE   SIZE    RES STATE    TIME   WCPU COMMAND
  902 tsgan         1  96    0   147M   134M RUN    929:41  3.96% Xorg
38659 root          1  96    0 15556K 12256K RUN      0:00  3.47% cc1
 1206 tsgan         1  44   19   156M 36940K select 178:06  0.00% 
operapluginwrapper
  978 tsgan         1  44    0   212M   173M select 103:26  0.00% opera
  954 tsgan         1  44    0 35236K 18372K select  11:59  0.00% 
wnck-applet
  975 tsgan         7  44    0   198M   159M ucond    8:53  0.00% 
thunderbird-bin
  922 tsgan         1  44    0  4808K  1460K select   4:43  0.00% gam_server
  956 tsgan         1  44    0 35324K 16328K select   4:36  0.00% 
mixer_applet2
  962 tsgan         1  44    0 13736K  5936K select   1:57  0.00% 
gnome-screensaver
 1224 tsgan         1  44    0 70232K 28900K select   1:33  0.00% pidgin
 1591 tsgan         1  44   19  5520K   772K select   1:17  0.00% 
operapluginwrapper
  772 root          1  44    0  4496K   928K select   1:03  0.00% 
hald-addon-storage
  930 tsgan         1  44    0 16204K  8744K select   0:48  0.00% metacity
  441 root          1  44    0  3276K   592K select   0:45  0.00% moused
  765 haldaemon     1  44    0  6164K  2252K select   0:41  0.00% hald
...

Is it due to SCHED_ULE makes a process CPU greedy and that is why my 
computer becomes slow?
Or it is something else? What SCHED_ULE sysctl knobs should I test here?
As I recall correctly I have never experienced such problems until 
recently.
Maybe I'm wrong here.

thanks,

Ganbold


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