UPDATED NON-ROOT METHOD: Identify the binning of the SoC on your HTC One..

What is your ACPU PVS number #?


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Turbotab

Senior Member
May 2, 2011
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UPDATE - Shox22 +1 has confirmed an easy method that doesn't need ROOT.

METHOD
- Reboot the phone twice

- With a File Explorer (FX File Explorer works well)

- Go to system /proc/last_kmsg

- Search the last_kmsg for a string 'acpu' You're looking for the following

[ 0.359957] c0 1 acpuclk-8064 acpuclk-8064: SPEED BIN: 1
[ 0.359957] c0 1 acpuclk-8064 acpuclk-8064: ACPU PVS: 4



There seems to be a bit of confusion, about the significance of the PVS value. They relate to Process Corners, and in part to threshold voltage, there is a lot more to it than that, but I'll keep it simple.

So far we've seen PVS values of between 0 to 6.

0 seems to indicate a SLOW corner, this means that its leakage current is lower than a 6, but its timings are slower. In theory, this chip should be good for power consumption, but offer less overclocking potential.

So, 6 means a FAST corner, this means that its leakage current is higher than a 0, but its timings are faster. Again, theoretically this chip offers good overclocking potential, at the expense of possibly higher power consumption.

Firstly, don't worry about it, all these chips have to pass Qualcomm's quality assurance, and lastly a higher PVS number is not necessarily the best, it depends on your priorities.

Alternative for ROOTED devices

You need to use a Terminal app, I use the following "Terminal Emulator"
https://play.google.com/store/apps/...idterm&feature=nav_result#?t=W251bGwsMSwyLDNd

Also Busybox must be installed for the 'grep' command
https://play.google.com/store/apps/...t=W251bGwsMSwxLDEsInN0ZXJpY3Nvbi5idXN5Ym94Il0.

1 - Open Terminal Emulator

2 - Type su & enter on keyboard

3 - Reboot phone

3 - Open Terminal Emulator and enter su (this gives the shell root access)

4 - Type the following

dmesg | grep acpuclk

press enter * hopefully profit:)

IF THAT DOESN'T WORK, a failsafe method is

1 - Open Terminal Emulator

2 - Type su & enter on keyboard

3 - Reboot phone

3 - Open Terminal Emulator and enter su (this gives the shell root access)

4 - Type the following

dmesg > /sdcard/dmesg.txt

With a file explorer check the sdcard for a file called dmesg.txt. Open it and search for 'acpuclk'. You're looking for 2 values listed below "SPEED BIN" & "ACPU PVS"


On 8064 (S4 Pro) devices there were 4 classes of SoC, depending on the result the kernel would load a different voltage table.
Slow / Nominal / Fast / Faster

On the HTC One / Snapdragon 600, the PVS is listing numerically, not by name. All S4 Pro that I've seen listed are marked as SPEED BIN 0, whereas all Snapdragon 600s are listed (so far) as SPEED BIN 1.

Thanks to recent HTC One Kernel Source release, I can can confirm that a Snapdragon 600 can have 1 of 7 possible PVS values: A higher PVS value is better.

0 / 1 / 2 / 3 / 4 / 5 / 6

So far, we have only see PVS values of # 2 / 3 / 4 / 5 in shipping devices

PVS 2

static struct acpu_level tbl_PVS2_1700MHz[] __initdata = {
{ 1, { 384000, PLL_8, 0, 0x00 }, L2(0), 925000 },
{ 1, { 486000, HFPLL, 2, 0x24 }, L2(5), 925000 },
{ 1, { 594000, HFPLL, 1, 0x16 }, L2(5), 925000 },
{ 1, { 702000, HFPLL, 1, 0x1A }, L2(5), 925000 },
{ 1, { 810000, HFPLL, 1, 0x1E }, L2(5), 937500 },
{ 1, { 918000, HFPLL, 1, 0x22 }, L2(5), 950000 },
{ 1, { 1026000, HFPLL, 1, 0x26 }, L2(5), 975000 },
{ 1, { 1134000, HFPLL, 1, 0x2A }, L2(14), 1000000 },
{ 1, { 1242000, HFPLL, 1, 0x2E }, L2(14), 1012500 },
{ 1, { 1350000, HFPLL, 1, 0x32 }, L2(14), 1037500 },
{ 1, { 1458000, HFPLL, 1, 0x36 }, L2(14), 1075000 },
{ 1, { 1566000, HFPLL, 1, 0x3A }, L2(14), 1100000 },
{ 1, { 1674000, HFPLL, 1, 0x3E }, L2(14), 1137500 },
{ 1, { 1728000, HFPLL, 1, 0x40 }, L2(14), 1162500 },
{ 0, { 0 } }
};

vs

PVS 5

static struct acpu_level tbl_PVS5_1700MHz[] __initdata = {
{ 1, { 384000, PLL_8, 0, 0x00 }, L2(0), 875000 },
{ 1, { 486000, HFPLL, 2, 0x24 }, L2(5), 875000 },
{ 1, { 594000, HFPLL, 1, 0x16 }, L2(5), 875000 },
{ 1, { 702000, HFPLL, 1, 0x1A }, L2(5), 875000 },
{ 1, { 810000, HFPLL, 1, 0x1E }, L2(5), 887500 },
{ 1, { 918000, HFPLL, 1, 0x22 }, L2(5), 900000 },
{ 1, { 1026000, HFPLL, 1, 0x26 }, L2(5), 925000 },
{ 1, { 1134000, HFPLL, 1, 0x2A }, L2(14), 937500 },
{ 1, { 1242000, HFPLL, 1, 0x2E }, L2(14), 950000 },
{ 1, { 1350000, HFPLL, 1, 0x32 }, L2(14), 962500 },
{ 1, { 1458000, HFPLL, 1, 0x36 }, L2(14), 987500 },
{ 1, { 1566000, HFPLL, 1, 0x3A }, L2(14), 1012500 },
{ 1, { 1674000, HFPLL, 1, 0x3E }, L2(14), 1050000 },
{ 1, { 1728000, HFPLL, 1, 0x40 }, L2(14), 1075000 },
{ 0, { 0 } }
};
Anyway, if this works on your HTC One, please share your results.
 
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djbenny1

Senior Member
Apr 9, 2011
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This info comes from other Qualcomm device forums, but it should still apply to the Snapdragon 600 in the HTC One. Your HTC One must be ROOTED.

Each SoC Qualcomm makes is tested (binned), the closer it comes to the ideal the better, these superior chips are described as higher binned. A higher binned chip will requires less voltage, to achieve a certain frequency than a lower performing part.

This means that the 'superior chips can be overclocked further or undervolted more aggressively, so this info is important for overclockers / modders.

You need to use a Terminal app, I use the following "Terminal Emulator"
https://play.google.com/store/apps/...idterm&feature=nav_result#?t=W251bGwsMSwyLDNd

Also Busybox for the 'grep' command
https://play.google.com/store/apps/...t=W251bGwsMSwxLDEsInN0ZXJpY3Nvbi5idXN5Ym94Il0.

1 - Open Terminal Emulator

2 - Type su & enter on keyboard

3 - Reboot phone

3 - Open Terminal Emulator and enter su (this gives the shell root access)

4 - Type the following
dmesg | grep PVS

press enter * hopefully profit:)

On 8064 devices there were 4 classes of SoC, depending on the result the kernel would load a different voltage table.

Slow
Nominal
Fast
Faster

Anyway, if this works on your HTC One, please share your results.
:eek: not all Ones were created equal

but what is the outcome we are looking for from terminal?
 
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Turbotab

Senior Member
May 2, 2011
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:eek: not all Ones were created equal

but what is the outcome we are looking for from terminal?
On 8064 devices (S4 Pro) you would see one of the following Slow / Nominal / Fast / Faster. I'm assuming this works on 8064T (Snapdragon 600) as well, I don't have a HTC One, so I can't be sure.

Example
<6>[ 0.426339] c0 1 [ACPU] get_pvs: ACPU PVS: Faster
 
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djbenny1

Senior Member
Apr 9, 2011
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On 8064 devices (S4 Pro) you would see one of the following Slow / Nominal / Fast / Faster. I'm assuming this works on 8064T (Snapdragon 600) as well, I don't have a HTC One, so I can't be sure.

Example
<6>[ 0.426339] c0 1 [ACPU] get_pvs: ACPU PVS: Faster
ah ok - i was going to root just now but then backed out as i cant be bothered replacing all my files again. looking forward to seeing what others turn up though
 

shox22

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May 12, 2010
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in the doc you posted i can see that u wrote: "dmesg \ grep pvs" in the console. Shouldnt that be : "dmesg | grep pvs"? Is their any difference if you use the "straight line" instead of the backslash?
 

djbenny1

Senior Member
Apr 9, 2011
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Just a couple of checks, you've got busybox installed and ran the command after a reboot?

There was no text similar to my example? e.g.
<6>[ 0.426339] c0 1 [ACPU] get_pvs: ACPU PVS: Faster
yea i have busybox installed.

no it didnt say that - i uploaded the file for you to look at

i also tried using ¦ just now instead of \ but it didnt work
 

Turbotab

Senior Member
May 2, 2011
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yea i have busybox installed.

no it didnt say that - i uploaded the file for you to look at

i also tried using ¦ just now instead of \ but it didnt work
OK cheers for trying, it may well be that Qualcomm have made more changes to the 8064T than we imagine, once people start looking into the kernel, we'll see if they still use multiple voltage tables.
 

Turbotab

Senior Member
May 2, 2011
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friend of mine:

Acpu pvs: 5
Speed bin 1

with "my" method
Excellent lets keep the data coming. Shox you are non-rooted, correct? If so. would you mind sharing your method, using ADB I imagine?

OK, I have looked at the Cyanogen Kernel commits for the Snapdragon 600's brother, the S4 Pro (8064). It list PVS number from 0 to 6, the voltage required for a set frequency, in this case 1.89 GHz reduces the larger the PVS number.

https://github.com/CyanogenMod/andr...mmit/0a11e25b66ce6d621288c524e070cb3ab98280d7

PVS 0 - would use 1.3 volts at 1.89 GHz

PVS 5 - would use 1.125 volts at the same 1.89 GHz, no guessing which is the better candidate for overclocking:)

Assuming that Qualcomm maintains the same coding logic, the higher the PVS number, the lower the voltage.

All S4 Pro that I've seen listed are marked as SPEED BIN 0, whereas all Snapdragon 600s are listed (so far) as SPEED BIN 1. I wonder if Snapdragon 600, are really just better binned S4 Pros??, maybe but I doubt it.

This will only confirmed when we can dive into the kernel sources or input from a dev with better information.
 
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shox22

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May 12, 2010
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Excellent lets keep the data coming. Shox you are non-rooted, correct? If so. would you mind sharing your method, using ADB I imagine?
Yep, i´m unrooted.

I did 2 restarts, then installed fx filemanager (just an example). Then i went in the proc folder and searched for the last_ksmg file. And there it was. Without root :good:

Update: Opened a thread in a german forum to get more data:
SPEED BIN: 1 | 1 | 1
ACPU PVS: 2 | 3 | 5
 
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goulies

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Apr 8, 2012
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Shox22 method unrooted :)
SPEED BIN: 1
ACPU PVS: 3


Opened file system/proc/last_ksmg with edit option with fx file manager and used search function "acpu"
 
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shox22

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So i think the Speed bin will be 1 on every device?

Here is an summary of the results we got yet:

pvs: 4, 5, 3, 3, 2, 3, 5, 2, 3, 5, 5, 2

13 results:
0: -
1: -
2: 3
3: 5
4: 1
5: 4
6: -
 
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