136x multiplier? O_O

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darkbasic
Posts: 14
Joined: Sat 27. Feb 2010, 00:06

136x multiplier? O_O

Post by darkbasic » Wed 3. Mar 2010, 02:30

:o
Have a look at:
laptop ~ # cat /sys/devices/system/cpu/cpu0/cpufreq/phc_controls
8:31 7:22 6:15 136:13

What is this? :?

The cpu is a Intel(R) Core(TM)2 Duo CPU U9400 @ 1.40GHz

Gillian00
Posts: 19
Joined: Sat 13. Feb 2010, 01:56

Re: 136x multiplier? O_O

Post by Gillian00 » Wed 3. Mar 2010, 13:03

it's the second number you have to change, not the first :-)

136 show you that this is the SLFM mode or Super Lower Frequence Mode ;-)

no worry

darkbasic
Posts: 14
Joined: Sat 27. Feb 2010, 00:06

Re: 136x multiplier? O_O

Post by darkbasic » Wed 3. Mar 2010, 13:43

Gillian00 wrote:it's the second number you have to change, not the first :-)
I know it, but I thinked it should be the lower one, not 136 :D

Also, is the first the "overclock" mode? How can I check when and if it use it?
How can I check the frequency it uses?
Does the conservative governor uses it?

Code: Select all

cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009
Per favore, comunicare errori e malfunzionamenti a cpufreq@vger.kernel.org.
analisi della CPU 0:
  modulo acpi-cpufreq
  CPU che operano alla stessa frequenza hardware: 0 1
  CPU che è necessario siano coordinate dal software: 0
  latenza massima durante la transizione: 10.0 us.
  limiti hardware: 800 MHz - 1.40 GHz
  frequenze disponibili: 1.40 GHz, 1.40 GHz, 1.20 GHz, 800 MHz
  gestori disponibili: conservative, userspace, powersave, ondemand, performance
  gestore attuale: la frequenza deve mantenersi tra 800 MHz e 1.40 GHz.
                   Il gestore "performance" può decidere quale velocità usare
                  in questo intervallo.
  la frequenza attuale della CPU è 1.40 GHz.
analisi della CPU 1:
  modulo acpi-cpufreq
  CPU che operano alla stessa frequenza hardware: 0 1
  CPU che è necessario siano coordinate dal software: 1
  latenza massima durante la transizione: 10.0 us.
  limiti hardware: 800 MHz - 1.40 GHz
  frequenze disponibili: 1.40 GHz, 1.40 GHz, 1.20 GHz, 800 MHz
  gestori disponibili: conservative, userspace, powersave, ondemand, performance
  gestore attuale: la frequenza deve mantenersi tra 800 MHz e 1.40 GHz.
                   Il gestore "performance" può decidere quale velocità usare
                  in questo intervallo.
  la frequenza attuale della CPU è 1.40 GHz.

darkbasic
Posts: 14
Joined: Sat 27. Feb 2010, 00:06

Re: 136x multiplier? O_O

Post by darkbasic » Wed 3. Mar 2010, 16:41

darkbasic wrote:I thinked it should be the lower one, not 136 :D
At least for this I found an answer:
At the meantime we found out about those "strange" FIDs.

The 0.3.x - patches does not interpref the Byte where the FID is stored correctly.

Your first FID ( 74 ) is FID 10 with another Bit set that enables Non-Integer Bus-Ratio (it adds "0.5" to the FID set.) So the real FID is 10.5 and marks an OP-Point known as "IDA".

The IDA OP-Point is not supposed to be set and used manually.

The other strange FID ( 134 ) is in real FID "6" but with a Bit set that enables "SLFM".

SLFM does nothing else but telling the CPU to only use each second clock tick. So internally the CPU is halving the BUS frequency.


The next Version of PHC ( 0.4 ) will support all these things. It will be released soon.

Edit:
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
1401000 1400000 1200000 800000

Gillian00
Posts: 19
Joined: Sat 13. Feb 2010, 01:56

Re: 136x multiplier? O_O

Post by Gillian00 » Wed 3. Mar 2010, 23:20

The next Version of PHC ( 0.4 ) will support all these things. It will be released soon.
can't waaaaaaaiit !!!! :D

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