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#1 2009-09-01 20:58:03
- johnpatcher
- Member
- Registered: 2009-08-23
- Posts: 70
[SOLVED] Cpu frequency is set to maximum, although there is no load
I have a strange problem using cpufreq-utils.
I've set it up and after a fresh boot it works quite good, scaling the CPU frequency to my needs, but after it runs for a time, it scales the cpu frequency to the available maximum, although there is no load.
Here is the output of "cpufreq-info":
cpufrequtils 005: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
driver: acpi-cpufreq
CPUs which need to switch frequency at the same time: 0
hardware limits: 800 MHz - 2.53 GHz
available frequency steps: 2.53 GHz, 2.53 GHz, 1.60 GHz, 800 MHz
available cpufreq governors: ondemand, performance
current policy: frequency should be within 800 MHz and 2.53 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 2.53 GHz (asserted by call to hardware).
analyzing CPU 1:
driver: acpi-cpufreq
CPUs which need to switch frequency at the same time: 1
hardware limits: 800 MHz - 2.53 GHz
available frequency steps: 2.53 GHz, 2.53 GHz, 1.60 GHz, 800 MHz
available cpufreq governors: ondemand, performance
current policy: frequency should be within 800 MHz and 2.53 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 2.53 GHz (asserted by call to hardware).The following is the output of "top":
top - 22:53:17 up 10 min, 1 user, load average: 0.3, 0.06, 0.01
Tasks: 76 total, 1 running, 75 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.9%us, 4.9%sy, 0.0%ni, 90.8%id, 3.4%wa, 0.1%hi, 0.0%si, 0.0%st
Mem: 4038980k total, 100680k used, 3938300k free, 10600k buffers
Swap: 4104568k total, 0k used, 4104568k free, 34864k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 3796 628 540 S 0 0.0 0:00.59 init
2 root 15 -5 0 0 0 S 0 0.0 0:00.00 kthreadd
3 root RT -5 0 0 0 S 0 0.0 0:00.00 migration/0
4 root 15 -5 0 0 0 S 0 0.0 0:00.00 ksoftirqd/0
5 root RT -5 0 0 0 S 0 0.0 0:00.00 watchdog/0
6 root RT -5 0 0 0 S 0 0.0 0:00.00 migration/1
7 root 15 -5 0 0 0 S 0 0.0 0:00.00 ksoftirqd/1
8 root RT -5 0 0 0 S 0 0.0 0:00.00 watchdog/1
9 root 15 -5 0 0 0 S 0 0.0 0:00.00 events/0
10 root 15 -5 0 0 0 S 0 0.0 0:00.00 events/1
11 root 15 -5 0 0 0 S 0 0.0 0:00.00 khelper
12 root 15 -5 0 0 0 S 0 0.0 0:00.00 async/mgr
13 root 15 -5 0 0 0 S 0 0.0 0:00.00 kblockd/0
14 root 15 -5 0 0 0 S 0 0.0 0:00.00 kblockd/1
15 root 15 -5 0 0 0 S 0 0.0 0:00.00 kacpid
16 root 15 -5 0 0 0 S 0 0.0 0:00.00 kacpi_notify
17 root 15 -5 0 0 0 S 0 0.0 0:00.18 kseriod
18 root 20 0 0 0 0 S 0 0.0 0:00.00 khungtaskd
19 root 20 0 0 0 0 S 0 0.0 0:00.00 pdflush
20 root 20 0 0 0 0 S 0 0.0 0:00.00 pdflush
21 root 15 -5 0 0 0 S 0 0.0 0:00.00 kswapd0
22 root 15 -5 0 0 0 S 0 0.0 0:00.00 aio/0
23 root 15 -5 0 0 0 S 0 0.0 0:00.00 aio/1
24 root 15 -5 0 0 0 S 0 0.0 0:00.00 crypto/0
25 root 15 -5 0 0 0 S 0 0.0 0:00.00 crypto/1
458 root 15 -5 0 0 0 S 0 0.0 0:00.00 ata/0
460 root 15 -5 0 0 0 S 0 0.0 0:00.00 ata/1
461 root 15 -5 0 0 0 S 0 0.0 0:00.00 ata_aux
463 root 15 -5 0 0 0 S 0 0.0 0:00.01 scsi_eh_0
464 root 15 -5 0 0 0 S 0 0.0 0:00.01 scsi_eh_1
465 root 15 -5 0 0 0 S 0 0.0 0:00.00 scsi_eh_2
466 root 15 -5 0 0 0 S 0 0.0 0:00.00 scsi_eh_3
535 root 15 -5 0 0 0 S 0 0.0 0:00.00 kjournald2
560 root 16 -4 6236 844 408 S 0 0.0 0:00.01 udevd
741 root 18 -2 6236 796 372 S 0 0.0 0:00.00 udevd
742 root 18 -2 6236 796 372 S 0 0.0 0:00.00 udevd
803 root 15 -5 0 0 0 S 0 0.0 0:00.00 khpsbpkt
812 root 15 -5 0 0 0 S 0 0.0 0:00.00 ksuspend_usbd
828 root 15 -5 0 0 0 S 0 0.0 0:00.00 khubd
872 root 15 -5 0 0 0 S 0 0.0 0:00.00 knodemgrd_0
873 root 15 -5 0 0 0 S 0 0.0 0:00.00 kpsmoused
874 root 15 -5 0 0 0 S 0 0.0 0:00.00 kmmcd
879 root 15 -5 0 0 0 S 0 0.0 0:00.00 iwlagn
881 root 15 -5 0 0 0 S 0 0.0 0:00.00 phy0
889 root 15 -5 0 0 0 S 0 0.0 0:00.00 kondemand/0
890 root 15 -5 0 0 0 S 0 0.0 0:00.00 kondemand/1
893 root 15 -5 0 0 0 S 0 0.0 0:00.00 hd-audio0
897 root 15 -5 0 0 0 S 0 0.0 0:00.00 scsi_eh_4
898 root 15 -5 0 0 0 S 0 0.0 0:00.01 usb-storage
1073 root 15 -5 0 0 0 S 0 0.0 0:00.00 kjournald2
1091 root 15 -5 0 0 0 S 0 0.0 0:00.00 bluetooth
1096 root 15 -5 0 0 0 S 0 0.0 0:00.00 usbhid_resumer
1351 root 20 0 29732 620 288 S 0 0.0 0:00.00 syslog-ng
1352 root 20 0 32092 2060 1448 S 0 0.1 0:00.02 syslog-ng
1363 root 20 0 3788 580 480 S 0 0.0 0:00.00 acpid
1385 dbus 20 0 8388 760 552 S 0 0.0 0:00.01 dbus-daemon
1395 hal 20 0 27444 4380 3004 S 0 0.1 0:00.30 hald
1398 root 20 0 96204 2248 1452 S 0 0.1 0:00.00 console-kit-dae
1399 root 20 0 15664 1216 992 S 0 0.0 0:00.00 hald-runner
1490 root 20 0 17780 1152 992 S 0 0.0 0:00.02 hald-addon-inpu
1501 root 20 0 17772 1108 968 S 0 0.0 0:00.00 hald-addon-rfki
1515 root 20 0 17772 1084 952 S 0 0.0 0:00.00 hald-addon-gene
1528 root 20 0 17780 1136 984 S 0 0.0 0:00.00 hald-addon-stor
1529 root 20 0 17788 1100 956 S 0 0.0 0:00.00 hald-addon-cpuf
1530 hal 20 0 15372 1012 876 S 0 0.0 0:00.00 hald-addon-acpi
1545 root 20 0 12392 644 456 S 0 0.0 0:00.00 rpcbind
1578 root 20 0 5876 608 516 S 0 0.0 0:00.00 crond
1594 root 20 0 43416 1228 968 S 0 0.0 0:00.09 login
1595 root 20 0 3792 588 504 S 0 0.0 0:00.00 agetty
1596 root 20 0 3792 588 504 S 0 0.0 0:00.00 agetty
1597 root 20 0 3792 588 504 S 0 0.0 0:00.00 agetty
1598 root 20 0 3792 584 504 S 0 0.0 0:00.00 agetty
1599 root 20 0 3792 584 504 S 0 0.0 0:00.00 agetty
1608 root 20 0 17780 1124 976 S 0 0.0 0:00.00 hald-addon-stor
1613 root 20 0 20024 3188 1608 S 0 0.1 0:01.04 bash
1661 root 20 0 10660 1024 788 R 0 0.0 0:00.00 topI really don't understand why it doesn't throttle the cpu, are there any options for that?
Best regards
johnpatcher
Last edited by johnpatcher (2009-09-06 03:01:01)
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#2 2009-09-01 23:03:29
- apollokk
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- From: Please delete me!
- Registered: 2009-03-23
- Posts: 157
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Re: [SOLVED] Cpu frequency is set to maximum, although there is no load
/me wants you to detele this account... please delete it.
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#3 2009-09-02 12:50:10
- johnpatcher
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- Registered: 2009-08-23
- Posts: 70
Re: [SOLVED] Cpu frequency is set to maximum, although there is no load
What excactly am I intended to do? Haven't read anything new?
Last edited by johnpatcher (2009-09-02 12:51:48)
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#4 2009-09-02 13:13:23
- blasse
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- From: Poland
- Registered: 2008-04-24
- Posts: 303
Re: [SOLVED] Cpu frequency is set to maximum, although there is no load
I would suggest trying userspace governor and trying if changing CPU speed will work if set "by hand" 
Proud ex-maintainer of firefox-pgo
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#5 2009-09-03 16:43:59
- uwinkelvos
- Member
- Registered: 2009-06-07
- Posts: 129
Re: [SOLVED] Cpu frequency is set to maximum, although there is no load
Did i get this right: after a fresh restart cpufreq-info tells you, that the current frequency is 800 Mhz and some time later without starting any other apps, the cur freq rises to 2.53 Ghz?
you might try something like this:
(while true; do echo $(date); sudo cat /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq; sleep 10; done) > freq.logLast edited by uwinkelvos (2009-09-03 17:01:02)
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#6 2009-09-06 03:00:47
- johnpatcher
- Member
- Registered: 2009-08-23
- Posts: 70
Re: [SOLVED] Cpu frequency is set to maximum, although there is no load
Did i get this right: after a fresh restart cpufreq-info tells you, that the current frequency is 800 Mhz and some time later without starting any other apps, the cur freq rises to 2.53 Ghz?
you might try something like this:
(while true; do echo $(date); sudo cat /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq; sleep 10; done) > freq.log
Yeah, you got it right. I think that it is the framebuffer, I have increased it (to 1280x800, 24 bit), because the cpu-frequency is "just" set to maximum when my screen is full, if I clear it, then it stucks at 800 MHz. With the X server loaded I have 800 MHz also.
My conclusion is that the (big) framebuffer causes that much cpu load.
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