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[KERNEL][UV][Linux 3.4.48] Harsh Kernel build June-10

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16th December 2012, 06:04 AM   |  #11  
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what exactly is faster pvs anyways and how can one check if its in use?
16th December 2012, 06:16 AM   |  #12  
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Quote:
Originally Posted by MiG123

what exactly is faster pvs anyways and how can one check if its in use?

dmesg > /sdcard/dmesg.txt in terminal or adb shell dmesg | grep acpuclk or adb shell dmesg | grep PVS

Should say Nominal, Slow, Fast, or Faster

Faster = higher binned and theoretically can uv lower
Last edited by UZ7; 16th December 2012 at 06:19 AM.
16th December 2012, 09:33 AM   |  #13  
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Hm, as far as I can see it, PVS= processor voltage settings. And for what I found this seems to be kind of preconfigured voltage settings not more and not less.
So faster IMHO has nothing to do with UV but OCing...

But never less this hole thing is irritating because if kernel don't supports UV and no OC what would bring PVS anyway ????

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Last edited by Martin_Ro; 16th December 2012 at 09:35 AM.
16th December 2012, 09:45 AM   |  #14  
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Quote:
Originally Posted by Martin_Ro

Hm, as far as I can see it, PVS= processor voltage settings. And for what I found this seems to be kind of preconfigured voltage settings not more and not less.
So faster IMHO has nothing to do with UV but OCing...

But never less this hole thing is irritating because if kernel don't supports UV and no OC what would bring PVS anyway ????

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Well, our cpu are made at some quality standards. We have 4 different quality of cpu for apq8064 from Qualcomm. so depending on which one is on your phone it selects frequency table.

Google kernel source have same frequency table for fast and faster. So those with faster are not getting their extra advantage

And faster has lot to do with UV, when you look as frequency table of faster, it is already preconfigured to have lower voltages than fast, and lot lower than slow binned.

Phones with faster binned should have better battery than slower binned phone out of box without any other configuration.

And for uv I will add later on. Hardcoded in kernel itself, but end results is faster binned cpu = run on lower voltages.

Sent from my Nexus 4
Last edited by Harsh; 16th December 2012 at 09:48 AM.
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16th December 2012, 11:54 AM   |  #15  
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Thx for your detailed answer I really appreciate this. Now it makes way more sense to me. Maybe you can add this background information to OP ?

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16th December 2012, 12:58 PM   |  #16  
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Quote:
Originally Posted by Martin_Ro

Thx for your detailed answer I really appreciate this. Now it makes way more sense to me. Maybe you can add this background information to OP ?

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Thanks for suggestion. Its now added in OP .
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16th December 2012, 02:33 PM   |  #17  
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Added build 1612.

Changelog:
Added UV for all 4 frequency table slow, nominal, fast and faster
UV added accordingly to maintain stability for all.
As I have NOMINAL CPU, its tested on that only

http://d-h.st/qtL
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16th December 2012, 06:12 PM   |  #18  
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How much is it undervolted for faster ?

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16th December 2012, 08:34 PM   |  #19  
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Quote:
Originally Posted by Imppy

How much is it undervolted for faster ?

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Undervolt in my kernel is not same at all frequencies. I adjusted as dynamic as table was created.

I can just say in short, my FASTER would be -100 mV at 384 MHz than fast frequency in Google stock and -125 mV at 1512 MHz.

So FASTER table starts at min 750 mV and ends at max 1025 mV.

And for FAST table starts at also 750 but ends bit higher at 1050'

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16th December 2012, 09:38 PM   |  #20  
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hi harsh, nice to see you here again. following you in the P990 forum for a long time. so anything from you must be great that i shouldn't miss.
although i have read through your posts, dont really get it..so my noob question:

this kernel should bring me more power or more juice ?

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