Related
I was thinking about installing SetCPU but I have heard stories of it not working very well on the Captivate. Does anyone use this, and if so what kind of battery life improvement are you seeing? Post config settings too please!
Its working just fine. I have a live background so my battery usage isnt very great so long as the screen is on. I had some trouble with the system being slow to respond every time I turned the screen back on when I had "screen off" profile set to max 200 and min 100. then it dawned on me that it would always just underclock to 100 I set it to max 200 and min 200 when the screen is off and also started using launcher pro and it is no longer sluggish at all.
This has saved me a gratuitous amount of battery life when the phone is idle.
Default profile
Max 1Ghz
Min 800Mhz
scaling Conservative
Charging/full profile
Same as default but scales on performance
Battery <50%
Max 800Mhz
Min 400Mhz
scaling Ondemand
screen off
Max 200
Min 200
Scale powersave
kenjindomini said:
Its working just fine. I have a live background so my battery usage isnt very great so long as the screen is on. I had some trouble with the system being slow to respond every time I turned the screen back on when I had "screen off" profile set to max 200 and min 100. then it dawned on me that it would always just underclock to 100 I set it to max 200 and min 200 when the screen is off and also started using launcher pro and it is no longer sluggish at all.
This has saved me a gratuitous amount of battery life when the phone is idle.
Default profile
Max 1Ghz
Min 800Mhz
scaling Conservative
Charging/full profile
Same as default but scales on performance
Battery <50%
Max 800Mhz
Min 400Mhz
scaling Ondemand
screen off
Max 200
Min 200
Scale powersave
Click to expand...
Click to collapse
Thanks for these, I was looking for a some decent settings. Mine were close to that to start, but I had no idea what I was doing, haha
I had some stability problems with it that I am now fairly certain are related to adjusting the polling frequency in advanced settings. After disabling setting advanced settings on boot, and a reboot, it has not caused the phone to hang once. I am also fairly sure that the phone boots with the conservative governor enabled and min/max frequencies set to 100MHz and 1GHz, even without SetCPU - so the main benefit here is profiles to force lower clocks with screen off, or during overheat or low battery.
CPU throttles itself. Any effects of setCPU is placebo effect
Err if you set the clocks yourself, you can produce a difference depending on what it's catered towards. I'm sure if I set the max clock to 200 (assuming the app works) for all situations there will be a difference.
Does the stock ROM have a perflock like the EVO that we need to disable?
Also, does the stock ROM automatically underclock at times, or???
I've now verified after clearing user data, the stock firmware already sets the conservative governor and allows it the full range of frequencies supported by the CPU. Only benefit from SetCPU should be profiles - reduce max clock when hot or low battery, that sort of thing.
Sent from my Samsung Captivate
I was going to make a screen off profile of 200mhz, to save battery. Should I bother doing this?
Edit: Nevermind, I'm just going to uninstall it. It's locked up my phone twice already
Default Profile: 800 MHz
Profiles:
Temp > 46 C -- 400 Max 100 Min Conservative
Battery < 40 -- 400 Max 100 Min Conservative
Screen Off -- 400 Max 100 Min Conservative
This now gives my phone life of about 2 days with moderate use (1 hour calls, 1 hour browsing and another 30-45 mins of using apps that need screen on like games, etc)
brandonb81 said:
I was going to make a screen off profile of 200mhz, to save battery. Should I bother doing this?
Edit: Nevermind, I'm just going to uninstall it. It's locked up my phone twice already
Click to expand...
Click to collapse
One thing u got to keep in mind, CPU scales up when woken from low speeds (like when u set for 200 n this takes a second or two). After some R&D i realized 400 MHz when sleeping is optimal with hardly noticeable lag.
Unhelpful said:
I had some stability problems with it that I am now fairly certain are related to adjusting the polling frequency in advanced settings. After disabling setting advanced settings on boot, and a reboot, it has not caused the phone to hang once. I am also fairly sure that the phone boots with the conservative governor enabled and min/max frequencies set to 100MHz and 1GHz, even without SetCPU - so the main benefit here is profiles to force lower clocks with screen off, or during overheat or low battery.
Click to expand...
Click to collapse
well, i have tried playing heavy games like asphalt 5, dungeon hunter, assasin's creed... these all games seemed to work with no lag even at 400 MHz when my battery was less than 40. Most apps I have or used or saw were very comfortable even at 400 MHz. But with multiple apps open, sometimes there was lag, so i set the max at 800 MHz, instead of 1 GHz.
Also, I set my connection to EDGE from 3G. This helped reduce phone from getting heated up with long calls.
I tried using this app myself but uninstalled it after a week. While I'm sure there was some underlying cause, it made my phone never wake up from sleep mode when it turned off.
Honestly thou, I know several android phone owners with s lot of phones That didn't see any real change in their battery life as s result. And based on my experiences, I'd say stay away from it.
Just my 2 cents thou
Sent from my SAMSUNG-SGH-I897 using XDA App
748/245
Temp < 50C 245/245 100
Screen Off 245/245 90
Charging/Full 719/245 80
Battery <40% 604/245 70
All ondemand
Temp > 42.1 528/245
Screen Off 528/160
Charging/Full 768/768
Battery <100% 768/245
that's listed by priority
Hungry Man said:
Temp > 42.1 528/245
Screen Off 528/160
Charging/Full 768/768
Battery
Click to expand...
Click to collapse
Screen Off: 245-480
**Stock is 245-245. 160 as a minimum seems to produce a LOT of wait time from when the call is coming in to when the phone lights up. More than 245 seems to whack the battery.
Keep in mind, when you wake up your phone, this Screen Off SetCPU Profile is active for at least a SECOND or two. The problem is that if you have your maximum at 245, you experience BAD lag trying to pull the lock bar down. At 245-480, the maximum is high enough that a) the lock bar pulls down as smoothly as a stock Eris, and b) even if SetCPU takes a couple of seconds to change the profile, at least you're at 480mhz for the first scrolling of the screen left/right (so you don't embarass yourself in front of iphone users). Anything higher than 480mhz is a different voltage. Almost the whole time your phone is 'Screen Off', it will be operating at 245 anyway. So 480 is a good setup for it to jump up when a call comes in (to play the ringtone and show the picture a little faster, and for the lock screen bar to pull down smoothly, and the first second of SenseUI to be smooth enough, until your phone changes the profile to your <100% profile.
Battery <100% 245-806
** Zanfur's take on how this processor clocks up/down its speeds will lend itself to a general wisdom that 768mhz isn't really slower than 806mhz, and that in instances of high variability of clock speed (aka you have some Power Save bias in SetCPU keeping it lower/higher at random, or you're doing very intermittent tasks), the processor rests at 768mhz more quickly, and wastes less time/'effort' changing speeds. Changing to 806 is another 'step' altogether, where 245 to 528 is one 'step', and that to 768 is another 'step'. Going to 806 is absolutely another step yet after that (which means your phone responds a LITTLE slower because it has one more step to 'throttle' up to). BUT, if you're doing a dedicated task, such as running a Linpack benchmark (which is a terrible benchmark anyway) your phone will move faster at 806, or if you're playing a game, or playing a video... generally the processor will stick at one speed (and not have to 'step' up or down), so 806 is faster. I clock friends' phones at 768 to avoid problems, keep it clean, etc etc. Some people put the minimum here at 160mhz, but I feel that this is too low (and another 'step', just like 806 is over 768, 160 is another step down from 245).
Charing (any) 480-806
** I keep the minimum here HIGHER than when the phone is on battery, because I'm less concerned about how much energy it's consuming, and having a minimum of 480 makes the phone very snappy no matter what, from the second you touch it
Overheating > 48C 122-528
** Clock speed here matters a LOT less than just getting your phone out of the heat. This phone doesn't overheat because it's overclocked, it overheats because you run it at an overclocked speed for a long time. MOST overheating instances are from wireless tethering and from broken charging systems (that keep trying to charge the battery and generate a lot of heat). The 'Failsafe' profile here provides a 'notification' option which I HIGHLY recommend.
My ex-gf's Eris actually CAUGHT FIRE, as in it looked like it was a zippo, right above the volume buttons. It used to overheat EVERY NIGHT that it was on the charger, excessively, so hot that you couldn't touch it. For a month or two it did this, actually, and caused no real damage to the phone. Since the night of the Flame (you can actually see the melted plastic and even on the outer case - she has a blue snap shell case on it that is melted as well), the phone has NOT overheated even one time on the charger. (Sorry for the story, it was a waste of time).
The point is that, the first time it happened, her phone System sound was on Silent, and she DIDN'T hear the notification that her phone was overheating. Apparently it doesn't matter (or she's very lucky her phone isn't damaged in terms of its operation!) how much it overheats for some people, but I like to have it warn me it's getting close to 50C. The notification's the important part there (so u can cool your eris), not the clock speed.
@pkopalek I like your settings you posted with a full description of each. I changed my settings to yours and give it a day or so and will report a status update as to performance quality
I've never lagged at 160mhz =p but that could just be my phones/ roms.
Hungry Man said:
I've never lagged at 160mhz =p but that could just be my phones/ roms.
Click to expand...
Click to collapse
my audio skips and it won't wake up when in a call at 160mhz. I keep mine at 245mhz minimum to keep phone working smoothly.
What does the different prioritys mean? Is that like what one its.focused on more?
Sent from my FroShedYo.V5 using XDA App
How do you guys clock your CPU so high? Whenever I try anything over 729 bad stuff happens. If I put it on 748 it lags and if i try 768 it freezes up. You guys are all using the droid eris right? What ROMs and kernels are you running? I'm on Kaosfroyo
sgbenton said:
How do you guys clock your CPU so high? Whenever I try anything over 729 bad stuff happens. If I put it on 748 it lags and if i try 768 it freezes up. You guys are all using the droid eris right? What ROMs and kernels are you running? I'm on Kaosfroyo
Click to expand...
Click to collapse
When a processor is made at the factory, it will always have flaws in it. The chip is tested to see what frequency it is stable at. So that is the speed that is stamped on the chip and the frequency that it is set at to operate for the consumer and not have any problems. When you overclock a processor, you are bypassing the frequency that the chip as been deemed to be stable at. After that, there is no set speed that your processor can handle, because each one is different according to the flaws it might have.
So in short (what I'm trying to say), the processor in your phone just can't handle those without causing problems. That's why when you overclock it, it's kind of a trial-and-error process to see what speed you can get out of it, but be careful, because too high can cause permanent damage.
Using Interactive governor
Main: 787/710
Temp > 42.1 C: 480/245 Priority: 100
Screen Off: 480/245 Priority: 95
Charging/Full: 480/245 Priority: 90
Most people here probably knows that the higher the CPU clock speed is, the higher voltage the phone needs. Which means higher clock speed results to more battery consumption. This is very simple logic, and sure, in real life practice this theory is proven to be true.
One method that is usually used to gain better performance while not necessarily waste more battery is by overclocking and in the same time undervolting. Because there obviously is a certain level of voltage needed to run a certain clock speed, the normal practice is reducing the voltage level to a bare minimum level where the CPU can still run alright while raising the highest clock speed possible. Reducing the voltage too low usually leads the phone to shut off because there isn't enough voltage for the phone to run.
By following the theories above, we can conclude that to achieve the best performance while still considering battery life, adjusting the proper OC and UV level is needed. This is obviously only talking about hardware affecting tweaks.
We now know that the main factor affecting the overall performance vs battery life turns to be the clock speed itself. Now here comes the ultimate questions.
1) How does the phone handle its clockspeed?
2) Does the voltage level change according to; a) the current clock speed the phone is running at, or b) the highest clock speed set/allowed the CPU to go?
3) Does the highest clock speed set (OC) leads to necessary higher voltage, or does the voltage accostumize itself to the running CPU level?
The most logical answer to number 1 would be that the CPU changes its clock speed according to whatever is happening and needs to be done to achieve the best performance. So the clock speed will go up when there's lots of tasks, and go down again when there's little or nothing to do.
Number 2 and 3 I can't explain, but I hope after someone with enough knowledge explains how voltage level works, we can have an answer to the following case;
IF two same phones clocked differently, one at 1ghz and the other at 1.5ghz run the the same relatively simple task for a long time, will the lower clocked one noticeably save/waste more battery than the other one? Or will they consume the same amount of battery because they would most likely be running at the same clock speed (say, at 200 ~ 600)?
Hopefully we'll have a better insight about overclocking vs undervolting
silentmelodies said:
Now here comes the ultimate questions.
1) How does the phone handle its clockspeed?
2) Does the voltage level change according to; a) the current clock speed the phone is running at, or b) the highest clock speed set/allowed the CPU to go?
3) Does the highest clock speed set (OC) leads to necessary higher voltage, or does the voltage accostumize itself to the running CPU level?
Click to expand...
Click to collapse
I believe one would have to set each speed & undervolt up together if one scales the speed. I just run mine straight up at 1300MHz/1325mV all the time & set up profiles for screen off, charging, etc. I get wonderful speed & battery life.
Example:
1300MHz/1325mV
1200MHz/1275mV
1000MHz/1175mV
/800/MHz/1125mV
etc.
Each phone is different due to the variations in manufacturing.
The only way to really optimise your phone is to try all of the various settings and combinations of voltage/speed.
Set the phone to a given speed, stress test and try decreasing the voltage until you get crashes / errors. Then raise the voltage one level (or 2 if you are a bit paranoid) and that is the stable voltage for that speed.
Rinse and repeat for all other speeds...
Then set profiles in setcpu / pimpmycpu accordingly.
Job done.
---------- Post added at 06:09 PM ---------- Previous post was at 06:08 PM ----------
countrycoyote said:
I believe one would have to set each speed & undervolt up together if one scales the speed. I just run mine straight up at 1300MHz/1325mV all the time & set up profiles for screen off, charging, etc. I get wonderful speed & battery life.
Example:
1300MHz/1325mV
1200MHz/1275mV
1000MHz/1175mV
/800/MHz/1125mV
etc.
Click to expand...
Click to collapse
I think you could lower your voltages quite a bit - eg Mine runs at 1.4GHz at 1.2V
Ok my friend... so... having designed a circuit for a mobile phone myself, I'll try to explain quickly what's the deal (tradeoff) between frequency and voltage.
A CPU/GPU basically is made out of MOSFET's (transistors). Lots of them! They act like capacitors. They have to be turned on and off. At a certain frequency. So, basically they are capacitors being filled and emptied at a certain frequency.
In practice, a capacitor being filled and emptied at a high enough frequency can be seen as a resistor. A variable resistor in fact, as you can see (more or less) here:
http://www.electronics-tutorials.ws/filter/filter_1.html
The thing is, the higher the frequency, the lower the equivalent resistance, because the amount of current keeps getting higher and higher. If the current value gets high enough the very tracks (you can think of them as wires) from the battery to the transistors start having a considerable drop in voltage (the resistance in these wires is supposed to be very low but it's not zero!). And if you have to much voltage drop on the wires the transistors don't get enough voltage to turn on/off.
So there you have it! That's the problem with overclocking. Voltage drop at the tracks (wires) because of increased current. You may also run into heat issues
Now, trying to answer your question, even at the same clock frequency a CPU that is processing stuff will use more energy than one that isn't "doing anything", because transistors aren't really changing state. But a CPU not doing anything at a lower clock frequency will waste less energy than another one not doing anything at a higher clock frequency, because energy is required to drive the clocking circuit itself. So it's very non-linear, you get the picture I hope
LarsPT said:
Now, trying to answer your question, even at the same clock frequency a CPU that is processing stuff will use more energy than one that isn't "doing anything", because transistors aren't really changing state. But a CPU not doing anything at a lower clock frequency will waste less energy than another one not doing anything at a higher clock frequency, because energy is required to drive the clocking circuit itself. So it's very non-linear, you get the picture I hope
Click to expand...
Click to collapse
This. This is the answer I was looking for. Thank you for the detailed explanation!
silentmelodies said:
This. This is the answer I was looking for. Thank you for the detailed explanation!
Click to expand...
Click to collapse
You're welcome!
Also, to complete the answer a bit more, lower voltage also helps with getting less energy consumption, because it takes more charge to "fill" a capacitor to, let's say, 1.3 V than to 1.1 V.
I have this tabled for a long time, but as i rarely used it i didn't bother with it much. From day one back in 2014 the tablet was sluggish and laggy, today is just unbearable even for browsing. So i have decided to take a look of what can i do.
I have installed the latest (10.26.2019) LineageOS-14.1-Deathly with gapps nano.
I have installed CPU Throttling Test from the play store and start testing to see what's going on. I saw that the CPU Throttle instantly (like in 10-15 sec max) from 1900mhz to 600mhz, and this is where the sluggishness comes from, the CPU is constantly throttled no matter that you are just looking at a simple web page.
I started playing with the Deathly Adiutor and under-voltage the cpu, set the max to 1400mhz and this is where it is stable as it is. At 1400mhz constant 100% CPU stress the CPU temps are around 90c (at 95 the cpu starts throttling). Anything above 1400mhz even with under voltages CPU results in throttling within 1-2 min, but even like that at 1400mhz and GPU set to be always used and at minimum of 480mhz (with setting in dev options to always use gpu for 2d composition) the performance was really much much better then the stock settings.
I have continued to play with it and noticed that if i apply pressure with my fingers on the back panel just below the camera where is the most hottest, the temps are dropping 10-15C, so i have opened it and i saw the issue.
The issue is that the metal shield radiators does not make a good contact with the thermal pad on the back panel, and thus can't dissipate the heat well. This may variety from user to user as some back panels will make better or worse contact, but its far from ideal.
Its good that i have some spare thermal pads around and i have applied them, and the result is perfect, drop in 12-17Cfrom stock setup under continues stress.
As a final result i have managed to bump the CPU from 1400mhz to 1600mhz with 1087mV voltage and at max 84C (down from around 90 at 1400mhz) at constant 100% CPU stress. The performance gains are around 100 to 150% (At around 42-47k GIPS up from 20-25k GIPS stock in CPU Throttling test). Additionally i have to say, its extremely easy to open the back cover panel.
Furthermore, i made an video to see how it runs and the settings i use.
https://youtu.be/_UJdjPDQB00
I'm attaching before and after the mod photos.
Quick followup, i have run 3D Mark benchmark and PCmark, see the screenshots below. Managed to achieve the world fastest Tab S, enjoy
Awesome.. I followed ur recommendations and set 1087mv at 1600mhz and its fasttttt
rihui said:
Awesome.. I followed ur recommendations and set 1087mv at 1600mhz and its fasttttt
Click to expand...
Click to collapse
Thanks mate. I'm glad it helps According to 3DMark, the performance now is slightly better then Galaxy Tab A 2019, it really bring new life to this tablet and its ready to rock another couple of years
how's your battery life with minimum CPU speed at 1600
Screen on & Standby time?
rihui said:
how's your battery life with minimum CPU speed at 1600
Screen on & Standby time?
Click to expand...
Click to collapse
Its not the minimum CPU frequency that gives you the performance boost, its the maximum frequency limit at 1600mhz down from 1900mhz, as i explained, to gain the performance, you need to avoid CPU from overheating and throttle down itself to the ground. That's why the max frequency with the thermal pads and improved thermals is 300mhz below the stock 1900mhz, and without the pads my max stable frequency were 1400mhz (500mhz below stock).
The minimum frequency will only smooth out initial animations and things like that, but don't have much of an impact on the overall performance. With that said, increasing the minimum frequency ofc will eat more battery and you don't need it, you can safely set it to 650mhz (as low as it allows) and depending on your kernel governor policy should have the same or better battery life. As i said, the main gainer is preventing the CPU from overheating at 1900mhz and throttle down to 650mhz where it sits most of the time with stock settings.
In fact if you limit your max frequency to 1400 or 1600mhz depending on your stable thermal results, and set minimum to 650mhz, you will see the performance gain AND significantly increased battery life due to that CPU does not go to 1900mhz and does not eat that much power and voltage. You really need to fine tune it depending on your needs, but at stock CPU throttling down to 650mhz and staying there is an manufacturer (Samsung) failure, and if i were discovered this when i bought it, i would wanted refund, as they advertise 1900mhz CPU which almost never works at that frequency.
I tested this method on other tablets and phones, and while it happens on other devices to throttle down after 5-7 mins (not after 15 sec), i have never seen to throttle more then down to 80% of the advertised frequency, but the Tab S goes almost immediately down to 35% where it stays and cripple the device. Its really really bad engineering from Samsung.
Going to try this.
Thanks
A lot better .
What thickness of thermal pad should I buy? Probably will buy from Amazon unless I need to make a trip to Microcenter. Thanks for this suggestion @nauvho
osutx427 said:
What thickness of thermal pad should I buy? Probably will buy from Amazon unless I need to make a trip to Microcenter. Thanks for this suggestion @nauvho
Click to expand...
Click to collapse
Well as you can see on the picture, the CPU bed already has one black pad by Samsung by default which is around 0.2/0.3mm i think, but it does not make contact, so i put on the CPU radiator 1mm pad and on the other radiators i put 0.5mm to equalize in case my pad is too thick. Your guide should be how easy is to close the back-plate, if you need too much force you may need thinner. So i guess you can take 0.3, 0.5 and 1mm pads.
effing A
Wow
Applied the same settings that you show in the video and WOW! It's like a new tablet. I didn't even put thermal pads.
joelcool69 said:
Applied the same settings that you show in the video and WOW! It's like a new tablet. I didn't even put thermal pads.
Click to expand...
Click to collapse
nice
just rooted t800 with MM + trw + SU.
added some thermal pads like in the pics.
installed Deathly Adiutor ....which said that doesn't like the kernel..and doesn't let to change the cpu max speed, and the voltage page doesn't even exist
installed Kernel Adiutor from playstore with which I can lower the freq, and for 1600 it works 1-2min at 27-28000GIPS then starts to throttle
louis_alphons said:
just rooted t800 with MM + trw + SU.
added some thermal pads like in the pics.
installed Deathly Adiutor ....which said that doesn't like the kernel..and doesn't let to change the cpu max speed, and the voltage page doesn't even exist
installed Kernel Adiutor from playstore with which I can lower the freq, and for 1600 it works 1-2min at 27-28000GIPS then starts to throttle
Click to expand...
Click to collapse
Why are you using MM? Also, did you noticed that center pad is thicker and side ones are tinnier? what are your CPU temps? Also probably due to MM, but I'm getting around 42gpis (average) at 1.6, but you should really check your pads placement, thickness and temps, put the CPU under load note the temps before throttling down.
nauvho said:
Why are you using MM? Also, did you noticed that center pad is thicker and side ones are tinnier? what are your CPU temps? Also probably due to MM, but I'm getting around 42gpis (average) at 1.6, but you should really check your pads placement, thickness and temps, put the CPU under load note the temps before throttling down.
Click to expand...
Click to collapse
I'm using MM since I don't know if it worth to upgrade; does this LineageOS work well...all features (cam, scanner, soud etc) works with it?
used 1mm pad over the cpu... 0.5 otherwise (china made); also removed the small factory pad and placed another pad patch there; the back cover heats well and I assume that the heat doesn't have where to go.
since it's not throttling at 1600MHZ (almost 100%, take a look at the pic)...from where to get more than 28GIPS?
louis_alphons said:
I'm using MM since I don't know if it worth to upgrade; does this LineageOS work well...all features (cam, scanner, soud etc) works with it?
used 1mm pad over the cpu... 0.5 otherwise (china made); also removed the small factory pad and placed another pad patch there; the back cover heats well and I assume that the heat doesn't have where to go.
since it's not throttling at 1600MHZ (almost 100%, take a look at the pic)...from where to get more than 28GIPS?
Click to expand...
Click to collapse
I don't think removing the stock black pad were a good idea, I did not removed mine, my pad is next to it. Also CPU throttle app is not reliable to monitor cpu temp (at least for me) , you should do it by starting the throttle test and then switch to deathly auditor and monitor the temp and clock there or other app like CPUz or Aida. Look at the video how I monitored the temp. The CPU will start throttle at 93-95c so your temp of 81 cannot be accurate if it throttle. Didn't you said that you throttle at 1.6 in your previous post?
Regarding the performance I think it might be eigher app difference between mm and 7.1 or due to MM itself. And yes everything is working perfectly for me with lineage, camera, fingerprint, everything is fine and it is mile better then MM imo.
installed 7.1
pcmark 4330 with your mods.
so the thermal pads doesn't matter on MM.
from my testings on 7.1 the boost in pcmark comes form setting max freq 1600 + undervoltage (3000->3500), and another boost...by setting the lower freq to 1600 (3500->4300)
louis_alphons said:
installed 7.1
pcmark 4330 with your mods.
so the thermal pads doesn't matter on MM.
from my testings on 7.1 the boost in pcmark comes form setting max freq 1600 + undervoltage (3000->3500), and another boost...by setting the lower freq to 1600 (3500->4300)
Click to expand...
Click to collapse
Nice.
About the pads, they matter only if the CPU temp under load drops when you apply pressure with fingers on the back cover as i explained in my first post, but idk if this apply to all tablets or just mine. The boost comes from not throttling the CPU down and being stable at maximum possible frequency. The CPU can go up to 1900mhz and beyond (2.1 by spec), but the cooling is not enough for that frequencies.
I think that adding an 0.5-1mm copper heat pipe thru radiators or copper heat pads similar to flagship phones might push it to 1.9, will order some someday and try it.
now it will be interesting ?% it's the termal mod in this boost, which means, performing the test in PCMARK only with steps 1+2:
1. LineageOS-14.1-Deathly
2. Deathly Adiutor (which requires step 1) + CPU max freq 1600 + undervoltage at that freq + CPU min freq 1600
3. Thermal pads added inside the box.
Since I started with thermal pads...I can say that in MM it doesn't matter.
-after upgrade to 7.1 as I said..PC...MArk around 3000 (thermal pads mounted)
-after setting max freq 1600 + undervoltage I got a boost in PCMark to 3600
-in addition, with min freq 1600...got another boost..to 4300; in this turbo state..the battery drains quickly, but the interface it's fast like the wind.
PCMark doesn't use CPU at 100%, it counts also how fast cand do certain short tasks...and this matters because if CPU it's in it's low power states..it loose time to rise its freq and do the calc at full power.
louis_alphons said:
now it will be interesting ?% it's the termal mod in this boost, which means, performing the test in PCMARK only with steps 1+2:
1. LineageOS-14.1-Deathly
2. Deathly Adiutor (which requires step 1) + CPU max freq 1600 + undervoltage at that freq + CPU min freq 1600
3. Thermal pads added inside the box.
Since I started with thermal pads...I can say that in MM it doesn't matter.
-after upgrade to 7.1 as I said..PC...MArk around 3000 (thermal pads mounted)
-after setting max freq 1600 + undervoltage I got a boost in PCMark to 3600
-in addition, with min freq 1600...got another boost..to 4300; in this turbo state..the battery drains quickly, but the interface it's fast like the wind.
PCMark doesn't use CPU at 100%, it counts also how fast cand do certain short tasks...and this matters because if CPU it's in it's low power states..it loose time to rise its freq and do the calc at full power.
Click to expand...
Click to collapse
Thermal mode does matter alot, CPU thermals is everything, the lower temps are, the higher frequency you can push the CPU, more frequency = more performance. As i said, without the thermal pads i could not get 1.6ghz to be stable, only 1.4 were stable-ish.
In stock rom, CPU governor and states are set according to the temps with the stock cooling. But if you don't change settings it wont change much. However Samsung engineers did a terrible job with those default settings, so as i explained in my first post only doing the software changes had dramatic impact on the performance because you get the CPU stable even at 1.4, but the thermal mod push it further to 1.6
The true performance benchmark is the 3DMARK (my screenshots 3 and 4 for score "ice storm unlimited" test and "Sling Shot" test) this will push your CPU and GPU to the max, PCMark is more about daily use performance and also can be used to measure battery performance between different settings.
Yes leaving CPU with minimum of 1.6 will drain battery more quickly naturally, is using more power, i leave mine at 1.2 as minimum, but minimum speed should not matter much in benchmarks if you are using the same as mine CPU governor. CPU governor basically tells the CPU how to behave, like how quickly to rise the frequency, for how long and etc.
Most of your know about this problem. People complaining about phone heating, phone shuts down in the middle of gaming, heating while gaming with 90hz in all forums. But no one come up with the solution and Some even told us to send the phone to get serviced [yeah, but even then the service center will say that it is motherboard fault, which is the costliest replacement of all around 25k INR]
[NOTE: I want this to be heard by ASUS to release software update. If you are a moderator of any Asus forum or who could contact ASUS dev, share this thread with them]
First and foremost we have to understand what is causing the problem. And everyone who is facing the problem knows Its the Temperature causing the shutdown. But ASUS never implemented any Warnings to to the UI, instead they give active cooler to 256+ GB version, while leaving 128 GB owners stranded. I faced the shut down problem when updating to A10 around a year back.
Every time when I game outdoor on warm condition (around 30 degrees) and After few months of updates, it started to shut down very frequently. So I switched back and forth to custom ROMs and even to stock A9s.
Faced the worst embarrassment "Gaming phone shuts down in front of cousins who were playing in budget phone"
Finally my Gaming phone become a phone which cant game anymore.
Finding the real Problem:
After researching about android thermals and I even tried to stop the shutdown from happening to my device. But I failed and my device successfully shuts down when there is a chance.
I switched to custom rom and installed GCAM. On taking few photos, my phone died. After restarting and enabling the CPU overlay which shown the temperature and clock speed of CPU. Opened GCAM and took some photos the temperature rose from 40-65 degrees in an instant and it died and I noted all the CPU cores are ran at max clockspeed.
So, I switched back to stock rom, used Armoury crate to limit and limited the CPU clock speed of GCAM, Again same result phone died (like the custom rom Armoury crate displayed the max clock speed of 2.96 Ghz, though the app was being set to use lower clock of 1.92 Ghz)
After using and failing to limit CPU clock using kernels, It was conclusive that the temperature is not causing the issue, "NO_THROTTLING" of CPU does.
During heavy load on CPU like gaming or benchmarking, all CPU cores will run at high clock speed, which increases the temperature of CPU. To counterfeit this, the system applies slightly lower max clock speed to all its cores, makes the CPU to run at slightly lower clock speed. As the temperature increases the max clock speed will get reduced till it can no longer produces heat (auto cooldown) on doing work. Same applies for GPU. This is called throttling.
What will happen, when throttling doesn't happen? All CPU and GPU cores run at max speed which increase the temperature, when there is nothing to stop the rising temperature. The temperature rises further [A10's thermal management kicks in] and shuts the device.
During charging, the CPU temperature will be higher due to battery dissipating the heat, so when there is even slight load on CPU (background activities like downloading) rapid rise in temperature even for few milliseconds kills device.
Maybe none of the testing devices have this problem & none of the developer devices have this problem, but this problem does exist and I'm asking ASUS to release the patch for devices which lacks controlling CPU clock speed via Armoury create, and fix the device which doesn't throttle (thermal engine)
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Temporary Solution: Manually down clock the CPU and GPU
After so many failed attempt to apply lower clock to CPU, I found the location where the max clock speed file was located.
[I modified the file and put together in tasker (paid app to automate things) found my CPU finally throttled again]
I shared the values taken from asus thermal management applied those values and uploaded it.
Be careful, This might brick your device if used improperly, if that happens you might need to flash raw image so backup anything important. Don't point me the finger afterwards. If you are okay with that lets proceed.
We Need root access and root browser. If you have root access open any root browser and Extract the attached zip file
It has two folders and some files. CPU Reading folder has all the CPU max clock speed you can use to apply lower clock.
the folder contains 9 digit number like 295241178
First 3 number denotes max clock speed of Prime core i.e., 2.96Ghz
Next 3 numbers denotes max clock speed of Big core i.e., 2.4Ghz
Last 3 number denotes max clock speed of little core i.e., 1.78Ghz
for GPU First 3 number is the MHz of max clock (6750 is 675 MHz)
Select the clock speed you need
(lower number = lower clock speed = low performance = less heating
Higher number = high clock speed = better performance = more heating)
CPU has 9 different clock speed littleBigPrime combos
Gpu has 5 different combos
Applying clock speed
Replace the CPU file cpu_max_freq to the folder /sys/module/msm_performance/parameters
Replace the Gpu file max_gpuclk value to the folder /sys/devices/platform/soc/2c00000.qcom,kgsl-3d0/kgsl/kgsl-3d0
Replace those files and see if your device shuts down on gaming, if it does choose the lower value and repeat the process.
Everything should work properly now. It might not be great solution but it will prevent shutdown.
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Im creating an app to solve this, which is in progress. Will update once everything is done.
por favor, preciso deste aplicatirvo!
venkatesh321 said:
Im creating an app to solve this, which is in progress. Will update once everything is done.
Click to expand...
Click to collapse
Are you done making the app, cuz i really need it rn
its power ic related issue. throttling app is reducing the performance