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ARCHIVES - 64bit Environments Running an AMD64 or Xeon system? Of course Linux is ready for it - but if you have any questions feel free to ask in here!

 
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  #1 (permalink)  
Old 23-Sep-2007, 21:31
linpagla
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Unhappy

Hi Friends,
My processor is recognized as 1999MHz under windows but only 1000MHz in my openSUSE 10.2 x86_64 system.
I've kernel 2.6.22.3-ccj53-default installed.

This is what cpuinfo shows:
Quote:
----- /proc/cpuinfo -----
processor : 0
vendor_id : AuthenticAMD
cpu family : 15
model : 44
model name : AMD Athlon™ 64 Processor 3000+
stepping : 2
cpu MHz : 1000.000
cache size : 512 KB
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt lm 3dnowext 3dnow up pni lahf_lm
bogomips : 2002.83
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc[/b]
Any idea what could be wrong here?
  #2 (permalink)  
Old 23-Sep-2007, 23:20
lxuser
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Default

Are you sure Dynamic throttling (power management) is not enable?
  #3 (permalink)  
Old 24-Sep-2007, 01:24
linpagla
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Angry

Quote:
Are you sure Dynamic throttling (power management) is not enable?
[/b]
Well, Power management is sure enabled, but is it Dynamic throttling?
I'm not sure!

How can I find it out? And how does that have an effect on the processor being slower?

One more question: Is the processor really running that slow, or is it just how Linux is showing it?
  #4 (permalink)  
Old 24-Sep-2007, 01:36
geoffro
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Default

Quote:
Well, Power management is sure enabled, but is it Dynamic throttling?
I'm not sure!

How can I find it out?........
[/b]
Yast > System > Power Management

/Geoff
  #5 (permalink)  
Old 24-Sep-2007, 07:20
microchip
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Default

Quote:
Well, Power management is sure enabled, but is it Dynamic throttling?
I'm not sure!

How can I find it out? And how does that have an effect on the processor being slower?

One more question: Is the processor really running that slow, or is it just how Linux is showing it?
[/b]
I have a AMD Athlon 64 4000+ (2.4 GHz) and it runs all the time at 1 GHz. Only when I do processor intensive stuff like encoding a movie or running BOINC, it jumps to it's full speed. If your power management is enabled, then it drops to the lowest possible speed when you're not doing CPU intensive stuff.

the powernow_k8 module is responsible for this. If you remove this module at runtime, your processor will go back to its full speed

you can completely disable power saving in YaST -> System -> System Services (Runlevel). Look for the powersaved service there and disable it
  #6 (permalink)  
Old 24-Sep-2007, 23:28
linpagla
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Posts: n/a
Red face

Quote:
I have a AMD Athlon 64 4000+ (2.4 GHz) and it runs all the time at 1 GHz. Only when I do processor intensive stuff like encoding a movie or running BOINC, it jumps to it's full speed. If your power management is enabled, then it drops to the lowest possible speed when you're not doing CPU intensive stuff.

the powernow_k8 module is responsible for this. If you remove this module at runtime, your processor will go back to its full speed

you can completely disable power saving in YaST -> System -> System Services (Runlevel). Look for the powersaved service there and disable it
[/b]
OK, that's seems cool. If the processor speed is controlled dynamically, ie. whenever reqd, it'll perform at its full capacity, then I guess its really good feature!

What do you suggest? Should it have any adverse affect on the system/processor?
Is it recommended to keep this powersaved service enabled or should it be disabled? :unsure:
  #7 (permalink)  
Old 25-Sep-2007, 00:22
Jop
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No adverse effect. Don't worry.
Processors are made to behave that way, so it is normal.
  #8 (permalink)  
Old 25-Sep-2007, 01:18
linpagla
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Posts: n/a
Talking

Quote:
No adverse effect. Don't worry.
Processors are made to behave that way, so it is normal.
[/b]
Cool, then! B)

Thanks a lot for the great info guys!
  #9 (permalink)  
Old 25-Sep-2007, 06:11
microchip
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Default

Quote:
OK, that's seems cool. If the processor speed is controlled dynamically, ie. whenever reqd, it'll perform at its full capacity, then I guess its really good feature!

What do you suggest? Should it have any adverse affect on the system/processor?
Is it recommended to keep this powersaved service enabled or should it be disabled? :unsure:
[/b]
actually you shouldn't disable power saving, even on a desktop system. That way the processor will drop its voltage and speed whenever it's doing nothing (reduces power consumption a bit) and will also generate less heat and make your system a bit more quiet as the processor's fan will also reduce its speed.
  #10 (permalink)  
Old 25-Sep-2007, 06:33
Jop
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And probably increase the cpu lifespan.
 
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