Linux 2.6.6 CPU Issue - Uses 50-55% of CPU when doing nothing.

From: Justin Piszcz
Date: Sat May 15 2004 - 04:12:13 EST

Top reports my CPU is 52% in use but top does not show any process using up
a lot of CPU, and the temperature confirms it is running at 50%.

top - 05:10:09 up 1:08, 41 users, load average: 1.03, 1.15, 1.63
Tasks: 240 total, 3 running, 236 sleeping, 0 stopped, 1 zombie
Cpu0 : 61.1% us, 10.5% sy, 0.1% ni, 21.7% id, 1.4% wa, 0.3% hi, 4.8%
si
Cpu1 : 59.4% us, 11.1% sy, 0.1% ni, 27.4% id, 2.1% wa, 0.0% hi, 0.0%
si
Mem: 2076188k total, 1260044k used, 816144k free, 36720k buffers
Swap: 4194272k total, 0k used, 4194272k free, 744056k cached

This only began happening when I compiled the kernel w/SMP support for my
P4 w/HT to take advantage of HT.

Does anyone know what to do in this case?

I was trying out a few apps xrn (python news reader before it started
doing this), I noticed it was having a lot of issues so I control-c'd it
and then the kernel is in some kind of CPU-hogging loop, anyhow, if I do
not get an e-mail back soon I will probably reboot, constantly 50% cpu
sucks, is there anything I can do to find out what the kernel is doing and
report back?

Is it a regular occurrence with Linux+SMP? If so is there any way to fix
it?


top - 05:06:33 up 1:05, 40 users, load average: 1.34, 1.31, 1.81
Tasks: 239 total, 2 running, 236 sleeping, 0 stopped, 1 zombie
Cpu0 : 46.9% us, 8.3% sy, 0.0% ni, 41.3% id, 0.0% wa, 0.3% hi, 3.3%
si
Cpu1 : 44.4% us, 7.9% sy, 0.0% ni, 47.7% id, 0.0% wa, 0.0% hi, 0.0%
si
Mem: 2076188k total, 1252868k used, 823320k free, 36684k buffers
Swap: 4194272k total, 0k used, 4194272k free, 738312k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
93 root 15 0 364m 104m 273m S 7.0 5.2 5:39.86 X
20245 war 16 0 15108 8632 12m S 2.0 0.4 0:07.75 gkrellm
73 root 16 0 1428 592 1384 S 0.7 0.0 0:15.39 inetd
327 war 16 0 7688 3632 6260 S 0.7 0.2 0:07.91 sawfish
616 war 15 0 11836 5720 10m S 0.7 0.3 0:04.77 panel
1060 war 15 0 10712 4640 9904 S 0.7 0.2 0:05.27
deskguide_apple
16028 war 16 0 2032 1132 1784 R 0.7 0.1 0:03.47 top
27095 war 17 0 2032 1132 1784 S 0.7 0.1 0:00.75 top
30169 root 18 0 5680 2924 4580 R 0.7 0.1 0:00.02 nmbd
765 root 15 0 7356 3748 5648 S 0.3 0.2 0:01.18 xterm
923 root 16 0 10300 2480 5648 S 0.3 0.1 0:00.13 xterm
2304 war 15 0 22196 12m 15m S 0.3 0.6 0:05.09 xchato
2690 root 16 0 7336 2436 5648 S 0.3 0.1 0:00.10 xterm
2830 war 15 0 21792 12m 15m S 0.3 0.6 0:04.94 xchats
1 root 16 0 488 240 464 S 0.0 0.0 0:06.72 init
2 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0


war@war:~$ sensors
eeprom-i2c-0-53
Adapter: SMBus I801 adapter at 0500
Memory type: DDR SDRAM DIMM
Memory size (MB): 512

eeprom-i2c-0-52
Adapter: SMBus I801 adapter at 0500
Memory type: DDR SDRAM DIMM
Memory size (MB): 512

eeprom-i2c-0-51
Adapter: SMBus I801 adapter at 0500
Memory type: DDR SDRAM DIMM
Memory size (MB): 512

eeprom-i2c-0-50
Adapter: SMBus I801 adapter at 0500
Memory type: DDR SDRAM DIMM
Memory size (MB): 512

w83627hf-isa-0290
Adapter: ISA adapter
VCore 1: +1.50 V (min = +0.00 V, max = +4.08 V)
VCore 2: +2.50 V (min = +0.00 V, max = +4.08 V)
+3.3V: +3.20 V (min = +2.82 V, max = +3.79 V)
+5V: +4.92 V (min = +0.00 V, max = +0.00 V)
+12V: +11.86 V (min = +0.00 V, max = +0.00 V)
-12V: -8.50 V (min = -14.91 V, max = -14.91 V)
-5V: -2.89 V (min = -7.26 V, max = -7.71 V)
V5SB: +5.56 V (min = +0.00 V, max = +0.00 V)
VBat: +3.33 V (min = +0.06 V, max = +0.00 V)
fan1: 3013 RPM (min = 166 RPM, div = 32)
fan2: 5273 RPM (min = 166 RPM, div = 32)
fan3: 1622 RPM (min = 332 RPM, div = 16)
temp1: +34C (high = +0C, hyst = +2C) sensor = thermistor
temp2: +61.5C (high = +85C, hyst = +80C) sensor = PII/Celeron
diode
temp3: +50.0C (high = +85C, hyst = +80C) sensor = thermistor
vid: +0.000 V
alarms:
beep_enable:
Sound alarm disabled



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