Re: computer becomes slow when compiling something

Kevin Oberman wrote:
>> Date: Mon, 27 Aug 2007 12:25:38 +0800
>> From: Ganbold <ganbold_at_micom.mng.net>
>> Sender: owner-freebsd-current_at_freebsd.org
>>
>> 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.
>>     
>
> I've seen it for a while. You are running out of RAM and I have found
> that once the swap use starts growing, things get VERY slow. I still
> think something is wrong, but memory is cheap and an extra 1/2 Gig can
> make a huge difference. 

At first I thought about that.
But I have 1GB memory and as I remember I hadn't such problems when I 
was running RELENG_6.
Wine compile is still running and top shows:

last pid: 46408;  load averages:  1.90,  2.31,  
2.11                                                                                 
up 3+02:31:42  12:36:15
107 processes: 3 running, 103 sleeping, 1 zombie
CPU states: 94.7% user,  0.0% nice,  5.3% system,  0.0% interrupt,  0.0% 
idle
Mem: 656M Active, 89M Inact, 183M Wired, 37M Cache, 111M Buf, 29M Free
Swap: 2048M Total, 321M Used, 1727M Free, 15% Inuse

  PID USERNAME    THR PRI NICE   SIZE    RES STATE    TIME   WCPU COMMAND
46406 root          1 110    0   122M   120M RUN      0:11 66.26% cc1
  902 tsgan         1  47    0   139M   122M select 931:51  6.40% Xorg
  962 tsgan         1  44    0 13736K  5780K select   1:59  0.59% 
gnome-screensaver
  975 tsgan         8  44    0   186M   141M ucond    9:30  0.29% 
thunderbird-bin
  954 tsgan         1  44    0 35236K 17328K select  12:02  0.10% 
wnck-applet
46408 root          1  44    0  3524K  1500K RUN      0:00  0.10% top
 1206 tsgan         1  44   19   156M  8480K RUN    178:52  0.00% 
operapluginwrapper
  978 tsgan         1  44    0   212M   144M select 104:21  0.00% opera
  922 tsgan         1  44    0  4808K  1340K select   4:45  0.00% gam_server
  956 tsgan         1  44    0 35324K 15128K select   4:38  0.00% 
mixer_applet2
 1224 tsgan         1  44    0 70232K 24344K select   1:34  0.00% pidgin
 1591 tsgan         1  44   19  5520K   740K select   1:17  0.00% 
operapluginwrapper
  772 root          1  44    0  4496K   892K select   1:04  0.00% 
hald-addon-storage
 1119 tsgan         2  -8    0   210M   172M piperd   0:57  0.00% 
gnome-terminal
  930 tsgan         1  44    0 16204K  8376K select   0:51  0.00% metacity
  441 root          1  44    0  3276K   584K select   0:48  0.00% moused
...
> I have not seen any difference between
> schedulers...about the same with 4BSD and ULE.
>   
I see.

thanks.

Ganbold


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