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KCE
n00b
Joined: 04 Jul 2007
Posts: 38
Location: Los Angeles
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 Posted: Sat Jul 14, 2007 2:57 am Post subject: overclocks being reset? |
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I run Intel Xeons "Woodcrest" 5120s. Their stock speeds are 1.86GHz but I've pin modded them to do 2.33Ghz. I have C1 (speedstepping) disable in the BIOS. When I startup my system and do "cat /proc/cpuinfo" it reports the cores running at 1867.000 which shouldn't be. Is power management/cpufrequency changing it? To maintain my overclocks must I remove cpu frequency support from the kernel?
EDIT: Okay I noticed when I do "emerge --sync", it reports the speeds ~2.4Ghz which is correct. ?
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poly_poly-man
Advocate
Joined: 06 Dec 2006
Posts: 2477
Location: RIT, NY, US
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| Posted: Sat Jul 14, 2007 3:27 am Post subject: |
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First of all, the cpuinfo shows stock speed, so that is not accurate.
emerge --sync shows the processor speed of the server you are grabbing from.
Please show output of "cpufreq-info"
hih,
poly-p man
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avatar: new version of logo - see topic 838248. Potentially still a WiP. |
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Genewb
Apprentice
Joined: 09 Jan 2007
Posts: 165
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| Posted: Sun Jul 15, 2007 3:54 am Post subject: |
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May I chip in here? I'm having the same sort of problem, my C2Q gets reported as 900MHz and 600MHz even though it's clocked at 2.7GHz (stock 2.4GHz)
cpufreq-info :
| Code: |
cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to linux@brodo.de, please.
analyzing CPU 0:
driver: acpi-cpufreq
CPUs which need to switch frequency at the same time: 0
hardware limits: 600 MHz - 900 MHz
available frequency steps: 900 MHz, 600 MHz
available cpufreq governors: conservative, ondemand, userspace
current policy: frequency should be within 600 MHz and 900 MHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 600 MHz.
analyzing CPU 1:
driver: acpi-cpufreq
CPUs which need to switch frequency at the same time: 1
hardware limits: 600 MHz - 900 MHz
available frequency steps: 900 MHz, 600 MHz
available cpufreq governors: conservative, ondemand, userspace
current policy: frequency should be within 600 MHz and 900 MHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 600 MHz.
analyzing CPU 2:
driver: acpi-cpufreq
CPUs which need to switch frequency at the same time: 2
hardware limits: 600 MHz - 900 MHz
available frequency steps: 900 MHz, 600 MHz
available cpufreq governors: conservative, ondemand, userspace
current policy: frequency should be within 600 MHz and 900 MHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 600 MHz.
analyzing CPU 3:
driver: acpi-cpufreq
CPUs which need to switch frequency at the same time: 3
hardware limits: 600 MHz - 900 MHz
available frequency steps: 900 MHz, 600 MHz
available cpufreq governors: conservative, ondemand, userspace
current policy: frequency should be within 600 MHz and 900 MHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 600 MHz. |
And yet cpuinfo gives:
| Code: |
cat cpuinfo
processor : 0
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Quad CPU @ 2.40GHz
cpu MHz : 600.000
cache size : 4096 KB
siblings : 4
core id : 0
cpu cores : 4
cpuid level : 10
bogomips : 5403.36
power management:
processor : 1
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Quad CPU @ 2.40GHz
cpu MHz : 600.000
cache size : 4096 KB
siblings : 4
core id : 3
cpu cores : 4
cpuid level : 10
bogomips : 5400.17
power management:
processor : 2
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Quad CPU @ 2.40GHz
cpu MHz : 600.000
cache size : 4096 KB
siblings : 4
core id : 1
cpu cores : 4
cpuid level : 10
bogomips : 5400.20
power management:
processor : 3
model : 15
model name : Intel(R) Core(TM)2 Quad CPU @ 2.40GHz
cpu MHz : 600.000
cache size : 4096 KB
siblings : 4
core id : 2
cpu cores : 4
cpuid level : 10
bogomips : 5400.18
power management:
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(Irrelevant bits snipped)
Note the ~5400 bogomips (of course, 5400/2 = 2700) |
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crazycat
l33t
Joined: 26 Aug 2003
Posts: 838
Location: Hamburg, Germany
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| Posted: Sun Jul 15, 2007 5:01 am Post subject: |
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| I think what cpuinfo is not always right. On my pc, cpuinfo sais my cpu runs at 1.86ghz while in truth i overclocked it to 2,7 or something. I can see my real frequency through "dmesg | grep Hz" or as bogomips/2. The thing with bogomips is that's it's cpu dependant and not all cpus in linux have their frequency as bogomips/2. I've got core2duo e6300. |
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darklegion
Guru
Joined: 14 Nov 2004
Posts: 468
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| Posted: Sun Jul 15, 2007 5:15 am Post subject: |
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| Try "x86info -mhz" |
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Genewb
Apprentice
Joined: 09 Jan 2007
Posts: 165
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| Posted: Sun Jul 15, 2007 3:56 pm Post subject: |
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| darklegion wrote: | | Try "x86info -mhz" |
Ohhh ... nice app 
| Code: |
Found 4 CPUs
--------------------------------------------------------------------------
CPU #1
/dev/cpu/0/cpuid: No such file or directory
Family: 6 Model: 15 Stepping: 7 Type: 0 Brand: 0
CPU Model: Core 2 Duo Original OEM
Feature flags:
fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflsh ds acpi mmx fxsr sse sse2 ss ht tm pbe sse3 monitor ds-cpl vmx est tm2 ssse3 cx16 xTPR
Extended feature flags:
SYSCALL xd em64t lahf_lm
Cache info
L1 Instruction cache: 32KB, 8-way associative. 64 byte line size.
L1 Data cache: 32KB, 8-way associative. 64 byte line size.
L3 unified cache: 4MB, 16-way associative. 64 byte line size.
TLB info
Instruction TLB: 4x 4MB page entries, or 8x 2MB pages entries, 4-way associative
Instruction TLB: 4K pages, 4-way associative, 128 entries.
Data TLB: 4MB pages, 4-way associative, 32 entries
L0 Data TLB: 4MB pages, 4-way set associative, 16 entries
L0 Data TLB: 4MB pages, 4-way set associative, 16 entries
Data TLB: 4K pages, 4-way associative, 256 entries.
64 byte prefetching.
The physical package supports 4 logical processors
2.70GHz processor (estimate).
--------------------------------------------------------------------------
CPU #2
Family: 6 Model: 15 Stepping: 7 Type: 0 Brand: 0
CPU Model: Core 2 Duo Original OEM
Feature flags:
fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflsh ds acpi mmx fxsr sse sse2 ss ht tm pbe sse3 monitor ds-cpl vmx est tm2 ssse3 cx16 xTPR
Extended feature flags:
SYSCALL xd em64t lahf_lm
Cache info
L1 Instruction cache: 32KB, 8-way associative. 64 byte line size.
L1 Data cache: 32KB, 8-way associative. 64 byte line size.
L3 unified cache: 4MB, 16-way associative. 64 byte line size.
TLB info
Instruction TLB: 4x 4MB page entries, or 8x 2MB pages entries, 4-way associative
Instruction TLB: 4K pages, 4-way associative, 128 entries.
Data TLB: 4MB pages, 4-way associative, 32 entries
L0 Data TLB: 4MB pages, 4-way set associative, 16 entries
L0 Data TLB: 4MB pages, 4-way set associative, 16 entries
Data TLB: 4K pages, 4-way associative, 256 entries.
64 byte prefetching.
The physical package supports 4 logical processors
2.70GHz processor (estimate).
--------------------------------------------------------------------------
CPU #3
Family: 6 Model: 15 Stepping: 7 Type: 0 Brand: 0
CPU Model: Core 2 Duo Original OEM
Feature flags:
fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflsh ds acpi mmx fxsr sse sse2 ss ht tm pbe sse3 monitor ds-cpl vmx est tm2 ssse3 cx16 xTPR
Extended feature flags:
SYSCALL xd em64t lahf_lm
Cache info
L1 Instruction cache: 32KB, 8-way associative. 64 byte line size.
L1 Data cache: 32KB, 8-way associative. 64 byte line size.
L3 unified cache: 4MB, 16-way associative. 64 byte line size.
TLB info
Instruction TLB: 4x 4MB page entries, or 8x 2MB pages entries, 4-way associative
Instruction TLB: 4K pages, 4-way associative, 128 entries.
Data TLB: 4MB pages, 4-way associative, 32 entries
L0 Data TLB: 4MB pages, 4-way set associative, 16 entries
L0 Data TLB: 4MB pages, 4-way set associative, 16 entries
Data TLB: 4K pages, 4-way associative, 256 entries.
64 byte prefetching.
The physical package supports 4 logical processors
2.70GHz processor (estimate).
--------------------------------------------------------------------------
CPU #4
Family: 6 Model: 15 Stepping: 7 Type: 0 Brand: 0
CPU Model: Core 2 Duo Original OEM
Feature flags:
fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflsh ds acpi mmx fxsr sse sse2 ss ht tm pbe sse3 monitor ds-cpl vmx est tm2 ssse3 cx16 xTPR
Extended feature flags:
SYSCALL xd em64t lahf_lm
Cache info
L1 Instruction cache: 32KB, 8-way associative. 64 byte line size.
L1 Data cache: 32KB, 8-way associative. 64 byte line size.
L3 unified cache: 4MB, 16-way associative. 64 byte line size.
TLB info
Instruction TLB: 4x 4MB page entries, or 8x 2MB pages entries, 4-way associative
Instruction TLB: 4K pages, 4-way associative, 128 entries.
Data TLB: 4MB pages, 4-way associative, 32 entries
L0 Data TLB: 4MB pages, 4-way set associative, 16 entries
L0 Data TLB: 4MB pages, 4-way set associative, 16 entries
Data TLB: 4K pages, 4-way associative, 256 entries.
64 byte prefetching.
The physical package supports 4 logical processors
2.70GHz processor (estimate).
--------------------------------------------------------------------------
WARNING: Detected SMP, but unable to access cpuid driver.
Used Uniprocessor CPU routines. Results inaccurate.
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The fact that the governor doesn't see it like that annoys me ... |
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crazycat
l33t
Joined: 26 Aug 2003
Posts: 838
Location: Hamburg, Germany
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| Posted: Sun Jul 15, 2007 6:06 pm Post subject: |
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| My older athlon64 tells the real frequency with cpuinfo even if I overclock it. Cpuinfo reports what cpuid instruction sais and not the real thing or what the kernel uses internally. I think it's a bios issue. |
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