Hi guys!
I have been reading about CPU Binning and I'm still a bit lost.
What is the difference between processors with different PSV? Does it have to do with quality or speed of the processors?
Or is it how they can handle lower voltages?
What are the advantages of having a PSV of 5 or 6? Any disadvantage?
Any advantage of having a PSV of 0,1 or 2?
Furthermore, is there a big difference at all in battery life and performance?
Cheers!
Hi,
Why not post HERE
This kind of question have a reply in the last page for example: http://forum.xda-developers.com/showpost.php?p=49036498&postcount=441.
What is the difference between processors with different PSV? Does it have to do with quality or speed of the processors? Speed no, quality not really, it depends if a different CPU binning can be called different quality between one or other?.
Or is it how they can handle lower voltages? It's this...
What are the advantages of having a PSV of 5 or 6? Any disadvantage? In theory you should undervolt more since these pvs_bin are the higher (with the 7 one), I see no disadvantage.
Any advantage of having a PSV of 0,1 or 2? Less undervolting, in theory..., advantage/disavdvantage it depends if you undervolt
Furthermore, is there a big difference at all in battery life and performance? Performance not really, even if less voltage produce less heat in high load, also in theory. Same thing about battery life, less voltage, blablabla...
Click to expand...
Click to collapse
I have a pvs_bin 1, I don't undervolt (because I had never see a real and noticeable improvement by undervolting, there is more and better to do for battery life in my opinion and with my tests) and I have no issue in term of battery life with why use nor in term of performance (raw performance, in benchs for example) or heat, etc...
Take a look here for undervolting: Nexus 5 Undervolting thread.
But the best is to try by yourself to see what your CPU can handle or not...
viking37 said:
Hi,
Why not post HERE
This kind of question have a reply in the last page for example: http://forum.xda-developers.com/showpost.php?p=49036498&postcount=441.
I have a pvs_bin 1, I don't undervolt (because I had never see a real and noticeable improvement by undervolting, there is more and better to do for battery life in my opinion and with my tests) and I have no issue in term of battery life with why use nor in term of performance (raw performance, in benchs for example) or heat, etc...
Take a look here for undervolting: Nexus 5 Undervolting thread.
But the best is to try by yourself to see what your CPU can handle or not...
Click to expand...
Click to collapse
Thank you!
In your opinion what is the best way to save battery life?
Related
I read a lot of comments about the processor used by qualcomm being asymmetrical thus one core is doing the heavy lifting most of the time while the other is at a lower clock speed and it affects overall performance but enhances battery life. Now that this is a big factor on why the performance and benchmarks are lower than tegra and exynos because its running on one core most of the time.
NOW.... When we get s-off and are able to mess with the kernel, cpu speeds and such. Can there be the possibility where we can use a tool like setcpu to force both cores to run at the same clock speed always? This might level the playing field and show some drastic performance enhancements imo.
Theoretically... Is there a slightest chance something like this can be done? I suppose so since we can manipulate the cpu so easily with kernel access
Please input
nothing? lol
this might be harder than i thought...
mike21pr said:
nothing? lol
this might be harder than i thought...
Click to expand...
Click to collapse
I don't think gingerbread has the capability even if the kernel was modified.
We can only wait and see
IMHO, with proper kernel, system will manage cores better and there will not be any lag. Asymmetrical core scaling will yield much better battery life then symmetrical one, just need better implementation.
Hello guys
I'm not a new user in kernels or ROMs .
I have a low-decent battery life ,and I'm sure there's a way to get a better battery life with undervolting .
I want to know
what is "undervolting" ?
What is the biggest damage it can cause?
What is PVS?
How do I know ,how much I can UV?
What are the steps to undervolt?
What I gain from UV (despite battery life)?
For your info ,I'm using AOSPAL ROM +FAUX's latest 16u kernel .
Thanks
Sent from my Nexus 5 using XDA Premium 4 mobile app
http://forum.xda-developers.com/showthread.php?t=2537000
Sent from my Nexus 5 using Tapatalk
Hi,
Most of your questions have a reply:
About undervolting: http://forum.xda-developers.com/google-nexus-5/general/nexus-5-undervolting-thread-t2537000.
CPU binning: http://forum.xda-developers.com/google-nexus-5/general/cpu-binning-nexus-5-t2515593.
The "risks" are instability like hard reboot, SOD, etc.... To find a "safe" value you will need to test by yourself to find what undervolting your CPU can handle, not all CPU's are equals.
Undervolt by steps like - 25mV, don't set your new values at boot unless your are sure it's stable (or you could encounter bootloop), test for a few days under different conditions (as your use).
The gain apart battery life (but you will not gain that much as people tend to think) is a little less heat, but again nothing huge..., better is to test by yourself and see what you will gain... or not.
Battery life depends mainly of your use, apps, signal quality and settings like, screen brightness, synchro, CPU governor, etc... In my opinion check first what could be the cause of your low battery life (and what is low battery life for you???) before play with undervolting.
As said above, undervolting will get you very minor battery life increases.
More than likely you have an issue, or its just your setup and usage giving you the battery life you are seeing.
Undervolting will not change any of this.... You'll gain only minutes of battery time.
Try some troubleshooting in the below thread to see if you have an issue, or how to setup for better battery life. Read through it a bit, from the last page and work back a bit. You can post meaningful screenshots there too. From gsam or BBS.... not the stock battery screen, it has no real useful info for finding issues. Good luck!!
http://forum.xda-developers.com/showthread.php?t=2509132
Nexus 5 Battery Results
I've been undervolting many systems for many years, primarily Linux desktops and some servers, and the primary benefit is that you get less heat output which means when running cpu-intensive tasks the temperature climbs slower so the throttling of the clockspeed kicks in later, so your phone will be faster in certain situations. If you take a phone which has been idle for a while and run a benchmark, and then immediately run that benchmark again, the 2nd time gets a lower result as the phone is still hot from the 1st. This makes drawing conclusions about settings really dificult but it illustrate that throttling from heat is affecting speed.
For most users their perception will be the phone runs cooler.
You do undervolt at each step in the processor's frequency, and each step is a trial+error activity, the throttling I mention means finding a stable under-volt at the higher frequency which is labour-intensive,i.e take the max clock, and undervolt it a little, run a benchmark which forces it to run at high clockspeed, and if it passes that test then run it again at the next step down in frequency. Once you've got the most stable top clockspeed, then do it progressively for all the other voltages on the way down.
In some platforms in Linux and Windoze, we wrote scripts which save the stable voltages and then undervolts a little and runs a stress-testing benchmark and if the system hung it wouldn't save the current voltages so the previous higher voltages were safer, stick that script in a startup script area and leave the compute to do many self resets, and you've calculated your device's voltage range. I wonder if someone has that done for Android??? For a laptop the FAN would run slower saving battery time and for laptops that would lead to say 20% better battery life but on a phone it won't make much saving as no fan.
Your phone will run most of its time (like 95%) at its lowest frequency, so for effort/benefit just focusing on dropping its voltage will gain the most in the phone running cooler.
Battery life improvement is marginal, if you look at your battery stats its down to your application settings and screen brightness, i.e. how you use and what you do with your phone. So if your battery life is bad, use your phone less!
I carry a slim USB battery, it is the $/effort/benefit the best thing you can do, $20 doubles your battery life, if you get one with a 1.5A-2A output in just a few minutes when the phone doesn't mind a battery attached, will dwarth every possible tweak and hack anyone can form in benefit.
Why does the M8 get much better battery life than the Nexus 5? Its battery is only 300 mAh larger and if anything, the Boomsound speakers, higher CPU clock speed and Sense 6 should sap some battery out of it. There must be something in the kernel that allows it to have such great battery life.
niral7 said:
Why does the M8 get much better battery life than the Nexus 5? Its battery is only 300 mAh larger and if anything, the Boomsound speakers, higher CPU clock speed and Sense 6 should sap some battery out of it. There must be something in the kernel that allows it to have such great battery life.
Click to expand...
Click to collapse
HTC uses tweaks, tricks and etc to make the battery more efficient
Nexus 5 has NOTHING for improvment
SO That's why :highfive:
Ehhhh I ain't buying that Story @t-shock. Sorry mate.
Magic is my guess.
But yes, the M8 far exceeds the N5 in battery. My M8 is setup the exact same (obviously keeping the M8's Dt2W feature enabled ) and it's average screen on time beats the N5 by 2 and a half hours.
But yes the battery is a bit bigger.... And yes, they must have made some things more cpu/battery efficient.
Its not because of tweaks OEMs tend to want things to be more stable and it to have better battery life but google doesn't really care google is more release it and create more bugs than they fix and if it weren't for our great custom ROM and kernel developers we would be stuck with google screwed up Roms
Thought this would be obvious. More efficient SoC. /thread
Clock speed being higher 0.1% of the time wouldn't be much of an added drain.
bblzd said:
Thought this would be obvious. More efficient SoC. /thread
Clock speed being higher 0.1% wouldn't be much of an added drain.
Click to expand...
Click to collapse
Then overclocking the Nexus 5 to 2.5 should help. Anandtech states that because tasks complete quicker, the CPU can drop to lower speeds quicker and save battery life. A dev should look into what optimizations HTC might have implemented into the M8. I would love to but I don't have any experience in that area.
Hai I'm wondering what's the best kernel for battery life is and if they're about the same which would be the best one
ninja85a said:
Hai I'm wondering what's the best kernel for battery life is and if they're about the same which would be the best one
Click to expand...
Click to collapse
There is no "best" kernel as each one will behave differently depending on your usage. Battery life is about trading performance for longer usage... If you don't like to tweak the kernel, leave it stock... the stock kernel and ROM are quite well optimized. Other wise if you don't mind tweaking, try any kernel, maybe start with Squid, and a conservative governor (like lionfish, conservative, or powersave), set the CPU minimum to 200Mhz, and the CPU Max Frequency 1094Mhz, even take a core or two off line if you want to get real crazy. Remember that to make a significant difference in battery you need to make a noticeable change in performance.
acejavelin said:
There is no "best" kernel as each one will behave differently depending on your usage. Battery life is about trading performance for longer usage... If you don't like to tweak the kernel, leave it stock... the stock kernel and ROM are quite well optimized. Other wise if you don't mind tweaking, try any kernel, maybe start with Squid, and a conservative governor (like lionfish, conservative, or powersave), set the CPU minimum to 200Mhz, and the CPU Max Frequency 1094Mhz, even take a core or two off line if you want to get real crazy. Remember that to make a significant difference in battery you need to make a noticeable change in performance.
Click to expand...
Click to collapse
Ah cheers
I've been using a V20 for several months now and I'm really enjoying the many features and flagship-grade hardware it offers. However, it has a lot of problems in terms of design. The V20 runs REALLY hot, and all that heat comes with an enormous power consumption (most figures for stock SOT, including my own, are around four hours.)
I've had a few ideas of my own for correcting LG's mistakes, and I'm wondering what all of your experiences are.
Underclocking the processor: The 820 is a fast, yet power-hungry and hot, processor. Underclocking it would trade off performance in favor of cooler phone and more battery life. Has anyone tried modifying the stock CPU governor or in any way messing with the clocks? I've experimented with LKT but didn't really notice any significant improvement.
Undervolting the processor: I'm not sure about how feasible this is on Android devices. Undervolting the processor would increase battery life and cool the phone at the expense of stability. Anyone find that the CPU is running at an necessarily high voltage?
Reducing Screen Resolution/Framerate: The V20 uses a 1440p display. With its screen size, most of the time this isn't necessary. Are there any tools to automatically reduce resolution when not playing back fullscreen 1440p content? Has anyone tried one, and what are the effects?
Aftermarket batteries: I've been using a 10500mAh extended battery. While it brings SOT up to usable levels, it's very heavy (and has over the course of a month or two decayed to only around 7Ah.) What's the general opinion on these?
Thermal pasting: Repasting or using at thermal pad has been a very common procedure for this device. For those who have done this, what kind of objective analysis of its effects can you providef?
waterlubber said:
I've been using a V20 for several months now and I'm really enjoying the many features and flagship-grade hardware it offers. However, it has a lot of problems in terms of design. The V20 runs REALLY hot, and all that heat comes with an enormous power consumption (most figures for stock SOT, including my own, are around four hours.)
I've had a few ideas of my own for correcting LG's mistakes, and I'm wondering what all of your experiences are.
Underclocking the processor: The 820 is a fast, yet power-hungry and hot, processor. Underclocking it would trade off performance in favor of cooler phone and more battery life. Has anyone tried modifying the stock CPU governor or in any way messing with the clocks? I've experimented with LKT but didn't really notice any significant improvement.
Undervolting the processor: I'm not sure about how feasible this is on Android devices. Undervolting the processor would increase battery life and cool the phone at the expense of stability. Anyone find that the CPU is running at an necessarily high voltage?
Reducing Screen Resolution/Framerate: The V20 uses a 1440p display. With its screen size, most of the time this isn't necessary. Are there any tools to automatically reduce resolution when not playing back fullscreen 1440p content? Has anyone tried one, and what are the effects?
Aftermarket batteries: I've been using a 10500mAh extended battery. While it brings SOT up to usable levels, it's very heavy (and has over the course of a month or two decayed to only around 7Ah.) What's the general opinion on these?
Thermal pasting: Repasting or using at thermal pad has been a very common procedure for this device. For those who have done this, what kind of objective analysis of its effects can you providef?
Click to expand...
Click to collapse
You did not mention what variant, most of the issues you mentioned can be rectified by flashing a custom rom and kernel
Sent from my LG-H910 using XDA Labs
There is also the almighty...AKT (Advanced Kernel Tweaks Mod you can flash. Use the 820 selection.
Also thermal mods as well
Mysticblaze347 said:
There is also the almighty...AKT (Advanced Kernel Tweaks Mod you can flash. Use the 820 selection.
Also thermal mods as well
Click to expand...
Click to collapse
Although LKT and AKT do have some advantages, they didn't give me much more Screen On Time - so I removed them. Have you gotten a significant more amount of SOT? If so, what settings?
baldybill said:
Although LKT and AKT do have some advantages, they didn't give me much more Screen On Time - so I removed them. Have you gotten a significant more amount of SOT? If so, what settings?
Click to expand...
Click to collapse
I can get around 10hrs sot (depending) using Xana extreme battery. That's the one I'm currently on.
Have a 4200 mAh battery (reg size)
---------- Post added at 06:13 PM ---------- Previous post was at 06:12 PM ----------
It is hard to tell. Alot of placebo mods out there. I also put zram at zero and knocked my entropy to 2048 for write. I'm still learning and tweaking tho.
Going along with this, which is better: AKT or NFS-Injector?
I would propose that most custom ROMs are probably placebo when it comes to battery life. Very few mention changing anything related to CPU governor, resolution, etc. all of which are the main factors in power consumption (running in Doze 5% more of the time isn't going to affect SOT, for example, which is the only metric that really matters.)
It doesn't help that LG's display technology leaves much to be desired.
Guys, order a Perfine 4100mah battery in Ali....ess and be happy. Better than that 10000mah ugly fat battery cases. SoT about 7 hours. And if that's not enough for one whole day you are facing other problems lol..
Okay, most admit. Only wifi the whole day cause it's been a rainy day.
Jogg3r said:
Guys, order a Perfine 4100mah battery in Ali....ess and be happy. Better than that 10000mah ugly fat battery cases. SoT about 7 hours. And if that's not enough for one whole day you are facing other problems lol..
Click to expand...
Click to collapse
Can you please share link of Battery in Ali Express
hemal_4404 said:
Can you please share link of Battery in Ali Express
Click to expand...
Click to collapse
https://m.de.aliexpress.com/item/32...d=8252amp-7eN9wah34-yQOJzgwQJScw1558254753245
Advanced Interactive Governor guide for LG V20?
I have seen the "Advanced Interactive Governor" tweaks elsewhere on here for other phones, but it looks like some of it may be able to be used on the LG V20.
(Links to a few of them will be at the bottom for reference.)
I have calculated the frequencies for both CPU's on the T-Mobile variant, the H918, for both maximal efficient load, and minimal efficient load, according to the math in those articles. If anyone would like to try this on an LG V20 with me and help me work out specifics for this phone, it would probably speed up the process quite a bit, and I could share what I have so far.
https://forum.xda-developers.com/android/general/guide-advanced-interactive-governor-t3518881
https://forum.xda-developers.com/mate-10/how-to/guide-advanced-interactive-governor-t3718123
https://forum.xda-developers.com/nexus-5x/general/guide-advanced-interactive-governor-t3269557
https://forum.xda-developers.com/showthread.php?t=2769899
Jogg3r said:
Guys, order a Perfine 4100mah battery in Ali....ess and be happy. Better than that 10000mah ugly fat battery cases. SoT about 7 hours. And if that's not enough for one whole day you are facing other problems lol..
Click to expand...
Click to collapse
In that case: I am facing other problems.
For some reason this is currently getting me only about 2 hours SOT on a used V20 I just bought. Battery capacity seems good according to accubattery.