acpi-cpufreq and I5 661 CPU

alexiy · 03-23-2010, 06:43 AM

Hi,

I have an issue with cpufreq. It says that my CPU can run on maximum of 2.79 GHz, when the CPU supports 3.33GHz.

Code:

root@darkstar:/# uname -a

Linux darkstar 2.6.33 #1 SMP Mon Mar 15 09:42:15 CET 2010 x86_64 Intel(R) Core(TM) i5 CPU         661  @ 3.33GHz GenuineIntel GNU/Linux

root@darkstar:/# cpufreq-info

analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 0 1 2 3
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 10.0 us.
  hardware limits: 1.20 GHz - 2.79 GHz
  available frequency steps: 2.79 GHz, 2.66 GHz, 2.53 GHz, 2.39 GHz, 2.26 GHz, 2.13 GHz, 2.00 GHz, 1.86 GHz, 1.73 GHz, 1.60 GHz, 1.46 GHz, 1.33 GHz, 1.20 GHz
  available cpufreq governors: userspace
  current policy: frequency should be within 1.20 GHz and 2.79 GHz.
                  The governor "userspace" may decide which speed to use
                  within this range.

Is it possible to cure it? Or it is BIOS limitation?

onebuck · 03-23-2010, 08:08 AM

Hi,

What does 'cat /proc/cpuinfo' show?

alexiy · 03-24-2010, 05:28 AM

Quote:

Originally Posted by onebuck

Hi,

What does 'cat /proc/cpuinfo' show?

w/o acpi-cpufreq, it shows (I've ommited rest 3 cpus):

Code:

root@darkstar:/# cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 37
model name      : Intel(R) Core(TM) i5 CPU         661  @ 3.33GHz
stepping        : 2
cpu MHz         : 4000.057
cache size      : 4096 KB
physical id     : 0
siblings        : 4
core id         : 0
cpu cores       : 2
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt aes lahf_lm arat tpr_shadow vnmi flexpriority ept vpid
bogomips        : 8000.11
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

and with the module, it shows (under load):

Code:

root@darkstar:/home/alexd# cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 37
model name      : Intel(R) Core(TM) i5 CPU         661  @ 3.33GHz
stepping        : 2
cpu MHz         : 2793.000
cache size      : 4096 KB
physical id     : 0
siblings        : 4
core id         : 0
cpu cores       : 2
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt aes lahf_lm arat tpr_shadow vnmi flexpriority ept vpid
bogomips        : 8000.11
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

"est" is there, any ideas?

Thank you.

kite · 03-24-2010, 07:56 AM

HI i have i3-530 at 2.93ghz and cpufreq-info reported 2.0ghz max also.

alexiy · 03-28-2010, 03:34 AM

Quote:

Originally Posted by kite

HI i have i3-530 at 2.93ghz and cpufreq-info reported 2.0ghz max also.

Hi Kite,

which motherboard do you use? My one is gigabyte, so I think maybe it is this motherboard vendor related probs.

kite · 03-28-2010, 04:00 AM

Yes, my motherboard is Gigabyte H55M-UD2H

This program might be of interest to you:

i7z
A better i7 (and now i3, i5) reporting tool for Linux.
http://code.google.com/p/i7z/

kite · 03-28-2010, 04:27 AM

I was fighting to get HD movies to be played by i3. No luck with vaapi or corevac codecs here. But mplayer with ffmpeg-mt works wonder for me just now. If you are interested in HD playback check this out: http://repo.or.cz/w/mplayer-build.git

use "git clone git://repo.or.cz/mplayer-build.git" to download and compile, do not use the snapshot tar.gz which is not complete for compiling.