Binary patched kernels for Pipo models

[rrileypm]

Binary patched kernels for Pipo models

this is 100% equal to kernel.img in Pipo_M9_Max_RileyROM_2.1

Ok. I'll just add the same kernels from that ROM into the kit.


Randy

[giouncino]

Normally I'm a fan of overclocking as well (especially on PC) - but on the PiPO I'm a bit pessimistic. Do you see here a real gain in applications (handling, feeling) while sacrificing stability for that ~10% increase ?

Yes it is, the overclock has to be made with intelligence: find the fastest stable frequencies, without loosing stability. In this specific case is more difficult because the best result must be achieved without sacrify also battery AND temperatures!

So, my target is to reach the maximum performances leaves voltages untouched or at least reduced. With the RAM of this tablet for example is very easy and the increase in frequency is the "overclocker paradise": from 580Mhz/1.3V you can very easily reach 720Mhz/1.2V. I think that can go over 800Mhz/1.3V (already tested, and stable).

PS: I think to be quite an expert in PC overclocking. I overclock PC from my first one (pentium 133) till now. I've overclocked and also modified processors since 1996...
For the tablets is different... but not so much.
The difference is that now I've less spare time to dedicate to this tablet unfortunately...

[rrileypm]

I just finished two new ROM's for the M8 Pro (3G and wifi versions)

Are you willing to try to patch the kernels? I'll upload them to my Google Drive and send you a link.

[rrileypm]

Here is the link to a zip file containing both kernels:

https://drive.google.com/file/d/0ByxbjJg99RBrNjMwcTZiOFBYR3M/edit?usp=sharing

[Pipo2000]

Yes it is, the overclock has to be made with intelligence: find the fastest stable frequencies, without loosing stability. In this specific case is more difficult because the best result must be achieved without sacrify also battery AND temperatures!

So, my target is to reach the maximum performances leaves voltages untouched or at least reduced. With the RAM of this tablet for example is very easy and the increase in frequency is the "overclocker paradise": from 580Mhz/1.3V you can very easily reach 720Mhz/1.2V. I think that can go over 800Mhz/1.3V (already tested, and stable).

PS: I think to be quite an expert in PC overclocking. I overclock PC from my first one (pentium 133) till now. I've overclocked and also modified processors since 1996...
For the tablets is different... but not so much.
The difference is that now I've less spare time to dedicate to this tablet unfortunately...

Giouncino,

A personal request :
Memory : 720Mhz / 1.3V
CPU : stock table just replace the 1.6Ghz with : 1.7Ghz / 1.375V

A quick thought thow :
Reaching out for maximum frequency's is not always the best method.
Maybe we got to look a bit further and try to find out wich stepping is used and how many wait states are used at certain frequency's.
As u have some overclock experience you know what i'm talking about.
Maybe its not even a bad idea to look inside the tablet first and see wich RAM chips are used.
I saw some tablets on the net with the Sandisk RAM chips.
Mine is def. not Sandisk but i forgot to write down the numbers on the chips so... next time I open my tablet I'll write them down.

Your first kernel with stock CPU/GPU and memory at 720Mhz/1.2V is stable at my M6Pro and defenitly smoother so that is already is a winner !(Antutu 19023)

I think U should be carefull lowering the voltages. There is always something like Vdroop (remember ?) and because the tablets like to throttle a lot with CPU frequency's that might be problem when they throttle to a lower speed.(my personal opinion)

[giouncino]

Giouncino,

A personal request :
Memory : 720Mhz / 1.3V
CPU : stock table just replace the 1.6Ghz with : 1.7Ghz / 1.375V

A quick thought thow :
Reaching out for maximum frequency's is not always the best method.
Maybe we got to look a bit further and try to find out wich stepping is used and how many wait states are used at certain frequency's.
As u have some overclock experience you know what i'm talking about.
Maybe its not even a bad idea to look inside the tablet first and see wich RAM chips are used.
I saw some tablets on the net with the Sandisk RAM chips.
Mine is def. not Sandisk but i forgot to write down the numbers on the chips so... next time I open my tablet I'll write them down.

Your first kernel with stock CPU/GPU and memory at 720Mhz/1.2V is stable at my M6Pro and defenitly smoother so that is already is a winner !(Antutu 19023)

I think U should be carefull lowering the voltages. There is always something like Vdroop (remember ?) and because the tablets like to throttle a lot with CPU frequency's that might be problem when they throttle to a lower speed.(my personal opinion)

I perfectly understand, but do you have any problem with RAM to 720/1.2V that you are asking me to prepare the new one with 1.3V?
Because CPU 1.7Ghz/1.375V AND RAM 720Mhz/1.3V could drain a lot more battery... and also voltage regulators of the Tablet could be affected...
I know very well the vdrop, but the Wattage here are very low, so I think it is a marginal problem (could become not so marginal lowering too much the voltages).

I'm now testing a new kernel with these values for the CPU:

MHz	mV
312	850
504	875
816	950
1008	1000
1200	1075
1440	1150
1704	1275

It seems working. My CPU seems very lucky! (even if I cannot reach 1.8Ghz/1.3V)
Now tested ONLY with ANTUTU stability test.

[giouncino]

EUREKA!!!

To reach the best performances it is necessary to calculate very well "intermediate" frequencies, for example:

ROM A:
MHz

312

504

816

1008

1200

1608

1704

is definitely slower than ROM B:
MHz

312

504

816

1008

1200

1440

1704

Why?
Because on ROM A there is too much distance in frequency between 1200 and 1608 with respect to rom B where 1440 is more or less on an intermediate frequency between 1200 and 1704.

In fact the antutu scores are as follows:

ROM A: 18890
ROM B: 19169

I'm using this graph to determine voltage/frequencies in a more logical way:
grafico SoC RK3188 Freq-Volt.zip
On this file you can see "stock voltages/frequencies curve" for the CPU and the modified curve I'm now using.
It is clearly visible that my curve is more linear than the stock one. On paper even the power consumption could be less than stock.

For reference it is written on the right table the previous parameters I was using on kernel_cpu1704h_gpu600_ddr720_low_voltage.img (it is not presented in the graph)

[Pipo2000]

I perfectly understand, but do you have any problem with RAM to 720/1.2V that you are asking me to prepare the new one with 1.3V?
Because CPU 1.7Ghz/1.375V AND RAM 720Mhz/1.3V could drain a lot more battery... and also voltage regulators of the Tablet could be affected...
I know very well the vdrop, but the Wattage here are very low, so I think it is a marginal problem (could become not so marginal lowering too much the voltages).
...

Nope, I don't have a problem with the CPU/GPU stock, RAM @ 720/1.2V combo. That worked flaweless for me.
I'm just wondering why the techies at Pipo reached to 1.3V on 580Mhz if there is no problem running at 720/1.2V .
You could be absolutely right on the regulators thow... maybe that will draw too much and kill the regulators in time. So maybe better to disregard my request there.

Can you please post your latest test kernel with 1.7Ghz/1.275V and 720Mhz/1.2V ?
Then I can do some testing too and let you know the results.

[rrileypm]

Did you see my request on post #50?

Thanks

[Pipo2000]

Did you see my request on post #50?

Thanks

Yes, but I have the M6Pro.
Correct if I'm wrong but i cannot use that kernel on my M6Pro no ?

[rrileypm]

Correct...you can't.

I was just thinking you could use the same parameters you did for the other kernels you have been doing.

[Balrog]

Here is the kernel I modified and use now for my Pipo M6 max (CPU 1704MHz / GPU 660 MHz / RAM 720 MHz):


Here are the scalings I used:


CPU
MHz mV
312 900
504 925
816 1000
1008 1075
1416 1250
1608 1300
1704 1375

GPU
MHz mV
133 975
200 1025
266 1025
400 1100
600 1250
660 1300

RAM
MHz mV
720 1250

Edit: Download link removed due to a problem with the kernel.
Edit2: New working version added.

kernel_cpu1704_gpu660_ddr720_new.zip

[giouncino]

Nope, I don't have a problem with the CPU/GPU stock, RAM @ 720/1.2V combo. That worked flaweless for me.
I'm just wondering why the techies at Pipo reached to 1.3V on 580Mhz if there is no problem running at 720/1.2V .
You could be absolutely right on the regulators thow... maybe that will draw too much and kill the regulators in time. So maybe better to disregard my request there.

Can you please post your latest test kernel with 1.7Ghz/1.275V and 720Mhz/1.2V ?
Then I can do some testing too and let you know the results.

here it is:
kernel_cpu1440-1704h_gpu600_ddr720_TARGET.zip

please, be careful with this kernel, because it has low voltages and if you don't have a "lucky" CPU it could be not stable. Let me know your results.
Till now, with this kernel I've use the following app:

Antutu: Benchmark: 19139
Stability test: passed

an app called "Stability test": ALL test passed without errors

web browser

general android usage

All seems working to me so far. I need more time to say that is really stable for my tablet.

RANDY: I can prepare a kernel for you but I need the stock kernel file and the parameters you want into.

I'm now focusing to the M6pro only, because I can test it directly, and of course I'm more interested on unleashing the full potential of this tablet.

[giouncino]

Here is the kernel I modified and use now for my Pipo M6 max (CPU 1704MHz / GPU 660 MHz / RAM 720 MHz):

[ATTACH]3948[/ATTACH]

Here are the scalings I used:


CPU
MHz mV
312 900
504 925
816 1000
1008 1075
1416 1250
1608 1300
1704 1375

GPU
MHz mV
133 975
200 1025
266 1025
400 1100
600 1250
660 1300

RAM
MHz mV
720 1250

which is your antutu result?
What about temperatures?
Why did you use ram Voltage to 1.25V? Is it not stable to you at 1.2V?

[A64]

Yes it is, the overclock has to be made with intelligence: find the fastest stable frequencies, without loosing stability. In this specific case is more difficult because the best result must be achieved without sacrify also battery AND temperatures!

So, my target is to reach the maximum performances leaves voltages untouched or at least reduced. With the RAM of this tablet for example is very easy and the increase in frequency is the "overclocker paradise": from 580Mhz/1.3V you can very easily reach 720Mhz/1.2V. I think that can go over 800Mhz/1.3V (already tested, and stable).

PS: I think to be quite an expert in PC overclocking. I overclock PC from my first one (pentium 133) till now. I've overclocked and also modified processors since 1996...
For the tablets is different... but not so much.
The difference is that now I've less spare time to dedicate to this tablet unfortunately...

Hmm maybe you didn't understand my question - or I questioned the wrong way.
My question was if you can feel the difference. Synthetic benchmark (AnTuTu) and pure numbers don't help me much, scrolling, browsing, playing film, music, responsiveness, whatever.. - I need to know, but HONESTLY .. if you feel the tablet behaving more smooth due to overclocking or don't.

Regarding overclocking I'm not a beginner either, doing it since 486 times, best fun was the DX4-100 @ 120MHz, online switchable with the PC case lock . Same for 5x86-133 (and 160) Then the Pentiums etc..

But I think I'll leave my M9Pro as is. Consumption raises exponentially as we increase voltage and frequencies, so 10% overclock gain will kick your battery's ass by more than 10% consumption. And my stock-clocked tablet with RileyROM 2.0 and Nova Launcher (and lots of apps) already does 18.100-18.500 in AnTuTu.

What would be more interesting is to spare some more power: CPU/GPU untouched but less voltage. Same for RAM-s: stock frequency but then let it have less voltage like 1.1V or so, even 1.0 - who knows.. Have you tried this direction ?

I assume the screen is consuming the most, but for sure lowering voltages on stock clocks would bring couple of extra minutes/hours during everyday use as well.