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zgredek
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Joined: 15 Jun 2005
Posts: 186
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 Posted: Tue Nov 29, 2005 2:55 pm Post subject: cpufreq |
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How can I make cpufreq see HIGHER cpu speeds than _normally_ available?
Just look:
| Code: | analyzing CPU 0:
driver: p4-clockmod
CPUs which need to switch frequency at the same time: 0
hardware limits: 333 MHz - 2.67 GHz
available frequency steps: 333 MHz, 667 MHz, 1000 MHz, 1.33 GHz, 1.67 GHz, 2.00 GHz, 2.33 GHz, 2.67 GHz
available cpufreq governors: powersave, userspace
current policy: frequency should be within 2.67 GHz and 2.67 GHz.
The governor "userspace" may decide which speed to use
within this range.
current CPU frequency is 2.67 GHz (asserted by call to hardware) |
It sais the hardware limits are 333-2,67GHz. What if I wanted the CPU to work at highter speeds when it's needed? |
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Earthwings
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Joined: 14 Apr 2003
Posts: 7753
Location: Germany
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| Posted: Tue Nov 29, 2005 3:03 pm Post subject: |
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Sorry, I'm not really sure what you mean. Does your CPU run faster than 2.67 GHz?
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zgredek
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| Posted: Tue Nov 29, 2005 3:12 pm Post subject: |
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| Exactly, sorry if the previous post wasn't clear enough. |
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Earthwings
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| Posted: Tue Nov 29, 2005 4:18 pm Post subject: |
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What does /proc/cpuinfo report? Does it change when you unload the p4-clockmod driver?
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zgredek
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Posts: 186
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| Posted: Tue Nov 29, 2005 4:26 pm Post subject: |
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| Quote: | processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Pentium(R) 4 CPU 2.66GHz
stepping : 1
cpu MHz : 2247.855
cache size : 1024 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflu
s acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl tm2 cid cx16 xtpr
bogomips : 5914.62 |
I've all the drivers build into the kernel, btw.
In other words, the problem is, if it's possible to use cpufreq to set a non-standard CPU speed, like, let's say: 2,4GHz or 2,5 GHz in my case? Or it's just using those predefined values (where is it getting them from?)... |
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Earthwings
Bodhisattva
Joined: 14 Apr 2003
Posts: 7753
Location: Germany
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| Posted: Tue Nov 29, 2005 4:47 pm Post subject: |
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| zgredek wrote: | | In other words, the problem is, if it's possible to use cpufreq to set a non-standard CPU speed, like, let's say: 2,4GHz or 2,5 GHz in my case? Or it's just using those predefined values (where is it getting them from?)... |
The predefined values are reported by your processor. A pentium 4 supports eight stages of frequencies which allows it to prevent damage in case of heat problems. You cannot change them.
You said your processor would run faster than 2.67 GHz, do you mean it is overclocked?
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zgredek
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| Posted: Tue Nov 29, 2005 4:57 pm Post subject: |
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| 8 stages of frequencies? You're joking right? I suppose it can run faster, but the question is if and how can I change those 8 values? |
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Earthwings
Bodhisattva
Joined: 14 Apr 2003
Posts: 7753
Location: Germany
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| Posted: Tue Nov 29, 2005 5:02 pm Post subject: |
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| zgredek wrote: | | 8 stages of frequencies? You're joking right? I suppose it can run faster, but the question is if and how can I change those 8 values? |
Mhm. Here are the 8 stages: 333 MHz, 667 MHz, 1000 MHz, 1.33 GHz, 1.67 GHz, 2.00 GHz, 2.33 GHz, 2.67 GHz.
Now please tell me if the CPU in your system is a Pentium 4 2.67 GHz or not. As I said, you cannot change the values (maybe you could with some stupid overclocking, but that's silly ricing).
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zgredek
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| Posted: Tue Nov 29, 2005 8:25 pm Post subject: |
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| Earthwings wrote: |
| zgredek wrote: | | 8 stages of frequencies? You're joking right? I suppose it can run faster, but the question is if and how can I change those 8 values? |
Mhm. Here are the 8 stages: 333 MHz, 667 MHz, 1000 MHz, 1.33 GHz, 1.67 GHz, 2.00 GHz, 2.33 GHz, 2.67 GHz.
Now please tell me if the CPU in your system is a Pentium 4 2.67 GHz or not. As I said, you cannot change the values (maybe you could with some stupid overclocking, but that's silly ricing).
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Yes, the CPU is a P4 2.66 (2.67, whatever)... So, to sum up, I cannot change the values are assigned to a particular CPU. In the case /me wants to use a non-cpufreq-defined frequency I must turn off freq scalling, right? I'm not talking about overclocking here and I'm not a fckin ricer  .
Ok... Let's see... I've just started using cpufreq, so I'm not sure I'm doing all the stuff correctly... Could you please explain how would I change minimal and max frequency and how to switch between profiles (that's what it's all about, am I right?). Should I mangle with the /proc and/or /sys interface or there's a better way? Thanks! |
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Earthwings
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Posts: 7753
Location: Germany
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| Posted: Tue Nov 29, 2005 8:37 pm Post subject: |
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I still don't get it. Please enlighten me how you increase the frequency without overclocking. For changing below max frequency, see here. There's a list of programs you can use.
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zgredek
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| Posted: Tue Nov 29, 2005 10:06 pm Post subject: |
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| Earthwings wrote: | | I still don't get it. Please enlighten me how you increase the frequency without overclocking. For changing below max frequency, see here. There's a list of programs you can use. |
Ok, the link explains a lot. Sorry, my posts were, sort of, messy, but even I don't know what I was looking for
Now, I switched to ondemand governor, edited the default config file, restarted cpufreq, and it seems to be working as expected... BTW: Can it be, possibly, cause damage to the CPU if the frequency is changed so many times?
Thanks for your time, Earthwings. |
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