99% System load

From: Florian Schanda
Date: Wed Feb 11 2004 - 09:23:11 EST

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Hello,

I have experianced a strage problem with recent 2.6.{0,1,2} kernels:

Sometimes (not allways, thats the problem, otherwise I could just avoid the
offending command) during paralel builds (for instance kde-libs or kde-base)
the build just stops, and I get a 99% system load.

For instance, just now I have (from top):

Tasks: 89 total, 5 running, 84 sleeping, 0 stopped, 0 zombie
Cpu0 : 0.3% us, 99.7% sy, 0.0% ni, 0.0% id, 0.0% wa, 0.0% hi, 0.0% si
Cpu1 : 0.3% us, 99.7% sy, 0.0% ni, 0.0% id, 0.0% wa, 0.0% hi, 0.0% si
Cpu2 : 1.3% us, 98.7% sy, 0.0% ni, 0.0% id, 0.0% wa, 0.0% hi, 0.0% si
Cpu3 : 1.0% us, 99.0% sy, 0.0% ni, 0.0% id, 0.0% wa, 0.0% hi, 0.0% si
Mem: 2071872k total, 1220772k used, 851100k free, 48080k buffers
Swap: 401616k total, 0k used, 401616k free, 892428k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
5197 ma1flfs 25 0 2256 884 2184 R 99.5 0.0 6:29.38 sh
5199 ma1flfs 25 0 2260 888 2184 R 99.5 0.0 6:28.02 sh
5201 ma1flfs 25 0 2260 884 2184 R 98.5 0.0 6:29.99 sh
5208 ma1flfs 25 0 1560 440 1404 R 98.5 0.0 6:32.03 grep
<snip>

I cannot kill -9 those processes. Is there some way to get rid of them without
a reboot?

The strange thing is, resuming the build after the reboot with exactly the
same command (make -j4) will work fine... It's just not reproducible at all,
but it happend often enought to make it annoying.

(BTW, this never happened with non-paralel builds)

I have no idea where to start looking... I have attached a "ps -axfu" in case
that helps.

Florian Schanda
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USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 1484 492 ? S 12:03 0:04 init [5]
root 2 0.0 0.0 0 0 ? SW 12:03 0:00 [migration/0]
root 3 0.0 0.0 0 0 ? SWN 12:03 0:00 [ksoftirqd/0]
root 4 0.0 0.0 0 0 ? SW 12:03 0:00 [migration/1]
root 5 0.0 0.0 0 0 ? SWN 12:03 0:00 [ksoftirqd/1]
root 6 0.0 0.0 0 0 ? SW 12:03 0:00 [migration/2]
root 7 0.0 0.0 0 0 ? SWN 12:03 0:00 [ksoftirqd/2]
root 8 0.0 0.0 0 0 ? SW 12:03 0:00 [migration/3]
root 9 0.0 0.0 0 0 ? SWN 12:03 0:00 [ksoftirqd/3]
root 10 0.0 0.0 0 0 ? SW< 12:03 0:00 [events/0]
root 11 0.0 0.0 0 0 ? SW< 12:03 0:00 [events/1]
root 12 0.0 0.0 0 0 ? SW< 12:03 0:00 [events/2]
root 13 0.0 0.0 0 0 ? SW< 12:03 0:00 [events/3]
root 14 0.0 0.0 0 0 ? SW< 12:03 0:00 [kblockd/0]
root 15 0.0 0.0 0 0 ? SW< 12:03 0:00 [kblockd/1]
root 16 0.0 0.0 0 0 ? SW< 12:03 0:00 [kblockd/2]
root 17 0.0 0.0 0 0 ? SW< 12:03 0:00 [kblockd/3]
root 18 0.0 0.0 0 0 ? SW 12:03 0:00 [khubd]
root 22 0.0 0.0 0 0 ? SW 12:03 0:00 [kswapd0]
root 21 0.0 0.0 0 0 ? SW 12:03 0:00 [pdflush]
root 19 0.0 0.0 0 0 ? SW 12:03 0:00 [kirqd]
root 20 0.0 0.0 0 0 ? SW 12:03 0:02 [pdflush]
root 23 0.0 0.0 0 0 ? SW< 12:03 0:00 [aio/0]
root 24 0.0 0.0 0 0 ? SW< 12:03 0:00 [aio/1]
root 25 0.0 0.0 0 0 ? SW< 12:03 0:00 [aio/2]
root 26 0.0 0.0 0 0 ? SW< 12:03 0:00 [aio/3]
root 27 0.0 0.0 0 0 ? SW< 12:03 0:01 [xfslogd/0]
root 28 0.0 0.0 0 0 ? SW< 12:03 0:00 [xfslogd/1]
root 29 0.0 0.0 0 0 ? SW< 12:03 0:00 [xfslogd/2]
root 30 0.0 0.0 0 0 ? SW< 12:03 0:00 [xfslogd/3]
root 31 0.0 0.0 0 0 ? SW< 12:03 0:00 [xfsdatad/0]
root 32 0.0 0.0 0 0 ? SW< 12:03 0:00 [xfsdatad/1]
root 33 0.0 0.0 0 0 ? SW< 12:03 0:00 [xfsdatad/2]
root 34 0.0 0.0 0 0 ? SW< 12:03 0:00 [xfsdatad/3]
root 35 0.0 0.0 0 0 ? SW 12:03 0:00 [pagebufd]
root 36 0.0 0.0 0 0 ? SW 12:03 0:00 [scsi_eh_0]
root 37 0.0 0.0 0 0 ? SW 12:03 0:00 [ahc_dv_0]
root 38 0.0 0.0 0 0 ? SW 12:03 0:00 [kseriod]
root 39 0.0 0.0 0 0 ? SW 12:03 0:00 [xfs_syncd]
root 85 0.0 0.0 0 0 ? SW 12:03 0:00 [xfs_syncd]
root 140 0.0 0.0 1536 596 ? S 12:03 0:00 syslogd -m 0
root 143 0.0 0.0 2252 1344 ? S 12:03 0:00 klogd
#1 166 0.0 0.0 1600 432 ? S 12:03 0:00 /sbin/portmap
nobody 172 0.0 0.0 1660 716 ? S 12:03 0:00 rpc.statd
root 178 0.0 0.0 0 0 ? SW 12:03 0:00 [rpciod]
root 179 0.0 0.0 0 0 ? SW 12:03 0:00 [lockd]
root 185 0.0 0.0 3116 1344 ? S 12:03 0:00 /usr/sbin/sshd -p 50000
root 198 0.0 0.0 2808 736 ? S 12:03 0:00 /opt/kde3/bin/kdm
root 206 1.4 0.8 281556 18176 ? SL 12:03 1:59 \_ /usr/X11R6/bin/X vt7 -auth /var/run/xauth/A:0-AoIuu1
root 207 0.0 0.0 2972 1080 ? S 12:03 0:00 \_ -:0
ma1flfs 219 0.0 0.0 2280 1052 ? S 12:04 0:00 \_ /bin/sh /opt/kde3/bin/startkde
ma1flfs 286 0.0 0.0 1480 328 ? S 12:04 0:00 \_ kwrapper ksmserver
root 200 0.0 0.0 1476 416 tty1 S 12:03 0:00 /sbin/agetty vc/1 9600
root 201 0.0 0.0 1480 420 tty2 S 12:03 0:00 /sbin/agetty vc/2 9600
root 202 0.0 0.0 1480 420 tty3 S 12:03 0:00 /sbin/agetty vc/3 9600
root 203 0.0 0.0 1480 420 tty4 S 12:03 0:00 /sbin/agetty vc/4 9600
root 204 0.0 0.0 1480 420 tty5 S 12:03 0:00 /sbin/agetty vc/5 9600
root 205 0.0 0.0 1480 420 tty6 S 12:03 0:00 /sbin/agetty vc/6 9600
ma1flfs 240 0.0 0.4 21804 9836 ? S 12:04 0:00 kdeinit: Running...
ma1flfs 245 0.0 0.5 23148 11280 ? S 12:04 0:00 \_ kdeinit: klauncher
ma1flfs 280 1.3 0.5 40528 11536 ? S 12:04 1:46 \_ /opt/kde3/bin/artsd -F 10 -S 4096 -a alsa -b 16 -s 60 -m artsmessage -c drkonqi -l 3 -f
ma1flfs 289 0.0 0.7 24656 14552 ? S 12:04 0:07 \_ kdeinit: kwin
ma1flfs 330 0.0 0.5 24624 12124 ? S 12:06 0:01 \_ kdeinit: kio_pop3 pop3s /tmp/ksocket-ma1flfs/klauncherFD5c2b.slave-socket /tmp/ksocket-ma1flfs/kmailzuxKna.slave-socket
ma1flfs 5211 0.0 0.5 22744 10364 ? S 14:03 0:00 \_ kdeinit: kio_file file /tmp/ksocket-ma1flfs/klauncherFD5c2b.slave-socket /tmp/ksocket-ma1flfs/kateCddIFa.slave-socket
ma1flfs 5249 0.1 0.7 26540 15656 ? S 14:09 0:00 \_ kdeinit: konsole
ma1flfs 5250 0.0 0.0 2412 1356 pts/1 R 14:09 0:00 | \_ /bin/bash
ma1flfs 5263 0.0 0.0 2316 764 pts/1 R 14:17 0:00 | \_ ps axfu
ma1flfs 5261 0.0 0.5 22752 10432 ? S 14:17 0:00 \_ kdeinit: kio_file file /tmp/ksocket-ma1flfs/klauncherFD5c2b.slave-socket /tmp/ksocket-ma1flfs/kateYyJMVa.slave-socket
ma1flfs 243 0.0 0.4 21580 9900 ? S 12:04 0:01 kdeinit: dcopserver --nosid
ma1flfs 248 0.0 0.7 26956 15800 ? S 12:04 0:02 kdeinit: kded
ma1flfs 255 0.0 0.6 24316 14040 ? S 12:04 0:00 kdeinit: kxkb
ma1flfs 282 0.0 0.8 29380 17656 ? S 12:04 0:00 kdeinit: knotify
ma1flfs 288 0.0 0.6 23164 12720 ? S 12:04 0:00 kdeinit: ksmserver
ma1flfs 291 0.0 0.7 25612 16160 ? S 12:04 0:03 kdeinit: kdesktop
ma1flfs 293 0.4 0.8 26796 17404 ? S 12:04 0:32 kdeinit: kicker
ma1flfs 296 0.0 0.0 1688 728 ? S 12:04 0:00 \_ ksysguardd
ma1flfs 300 0.0 0.6 24184 13216 ? S 12:04 0:00 kalarmd --login
ma1flfs 301 0.0 0.7 26320 15656 ? S 12:04 0:00 kgpg
ma1flfs 302 0.0 0.7 26976 16044 ? S 12:04 0:00 kalarm --tray
ma1flfs 311 0.0 0.6 24888 14460 ? S 12:05 0:00 kdeinit: kio_uiserver
ma1flfs 315 0.0 0.6 23488 13744 ? S 12:05 0:00 kwalletmanager
ma1flfs 321 0.6 1.1 34464 23852 ? S 12:05 0:48 juk -caption JuK -icon juk.png -miniicon juk.png
ma1flfs 5197 98.5 0.0 2256 884 ? R 14:03 14:36 /bin/sh ../../libtool --silent --mode=compile --tag=CXX g++ -DHAVE_CONFIG_H -I. -I. -I../.. -I/opt/kde3/include -I/opt/qt/include -I/usr/X11R6/include -DQT_THREAD_SUPPORT -D_REENTRANT -Wnon-virtual-dtor -Wno-long-long -Wundef -Wall -W -Wpointer-arith -Wwrite-strings -ansi -D_XOPEN_SOURCE=500 -D_BSD_SOURCE -Wcast-align -Wconversion -Wchar-subscripts -DNDEBUG -DNO_DEBUG -O2 -O3 -march=pentium4 -mcpu=pentium4 -Wformat-security -Wmissing-format-attribute -fno-exceptions -fno-check-new -fno-common -DQT_CLEAN_NAMESPACE -DQT_NO_ASCII_CAST -DQT_NO_STL -DQT_NO_COMPAT -DQT_NO_TRANSLATION -D_GNU_SOURCE -MT kcmlocale.lo -MD -MP -MF .deps/kcmlocale.Tpo -c -o kcmlocale.lo kcmlocale.cpp
ma1flfs 5199 97.8 0.0 2260 888 ? R 14:03 14:30 /bin/sh ../../libtool --silent --mode=compile --tag=CXX g++ -DHAVE_CONFIG_H -I. -I. -I../.. -I/opt/kde3/include -I/opt/qt/include -I/usr/X11R6/include -DQT_THREAD_SUPPORT -D_REENTRANT -Wnon-virtual-dtor -Wno-long-long -Wundef -Wall -W -Wpointer-arith -Wwrite-strings -ansi -D_XOPEN_SOURCE=500 -D_BSD_SOURCE -Wcast-align -Wconversion -Wchar-subscripts -DNDEBUG -DNO_DEBUG -O2 -O3 -march=pentium4 -mcpu=pentium4 -Wformat-security -Wmissing-format-attribute -fno-exceptions -fno-check-new -fno-common -DQT_CLEAN_NAMESPACE -DQT_NO_ASCII_CAST -DQT_NO_STL -DQT_NO_COMPAT -DQT_NO_TRANSLATION -D_GNU_SOURCE -MT toplevel.lo -MD -MP -MF .deps/toplevel.Tpo -c -o toplevel.lo toplevel.cpp
ma1flfs 5201 97.9 0.0 2260 884 ? R 14:03 14:31 /bin/sh ../../libtool --silent --mode=compile --tag=CXX g++ -DHAVE_CONFIG_H -I. -I. -I../.. -I/opt/kde3/include -I/opt/qt/include -I/usr/X11R6/include -DQT_THREAD_SUPPORT -D_REENTRANT -Wnon-virtual-dtor -Wno-long-long -Wundef -Wall -W -Wpointer-arith -Wwrite-strings -ansi -D_XOPEN_SOURCE=500 -D_BSD_SOURCE -Wcast-align -Wconversion -Wchar-subscripts -DNDEBUG -DNO_DEBUG -O2 -O3 -march=pentium4 -mcpu=pentium4 -Wformat-security -Wmissing-format-attribute -fno-exceptions -fno-check-new -fno-common -DQT_CLEAN_NAMESPACE -DQT_NO_ASCII_CAST -DQT_NO_STL -DQT_NO_COMPAT -DQT_NO_TRANSLATION -D_GNU_SOURCE -MT klanguagebutton.lo -MD -MP -MF .deps/klanguagebutton.Tpo -c -o klanguagebutton.lo klanguagebutton.cpp
ma1flfs 5208 98.2 0.0 1560 440 ? R 14:03 14:33 grep ^# ### BEGIN LIBTOOL TAG CONFIG: CXX$
ma1flfs 5246 1.8 4.0 97124 84304 ? S 14:08 0:09 kmail -caption KMail -icon kmail -miniicon kmail
ma1flfs 5260 3.3 1.0 30200 20724 pts/1 S 14:17 0:01 kate proclist

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