yashsingh1/xdaforums huggingface dataset:
[Nexus 7 General] whittikins:
Thanks very much for all your testing! I'm really curious why Franco and M-kernel at 1.3 have such a HUGE advantage in battery life compared to all the others. 1 additional hour is a big difference when total life is under 6 hours (all others). This has convinced me to use M-kernel because battery is most important, followed by performance. 10 more minutes on franco's is within margin of error, and even if 100% accurate, is a small difference to gain some performance AND possibility to overclock :).
[Nexus 7 General] twirtle2:
I have to ask, why do you keep thanking yourself?
[Nexus 7 General] Milamber33:
Ouch! Well spotted! Lol, yeah, that doesn't look good.
[Nexus 7 General] mk13139:
Curious about this too actually.

What should be considered as the best kernel for daily use? Good performance and battery, no reboots. I am doubting between Motley 246 and M-kernel a29, which one is better at the moment? Any other suggestions?

I'm not too crazy about Franco... seems there are problems with r38..

I'm on 4.2.1 stock b.t.w.

Thanks! :o
[Nexus 7 General] Foggy79:
Franco had problems with r37, but r38 fixed those and is top again.
[Nexus 7 General] Milamber33:
Not sure about Franco, but if you look in the M-Kernel thread you'll see that Metallice has tweaked the Ondemand governor to be much more conservative at clocking up the CPUs. People started complaining about lower performance because of it and he released one build with significantly more performance oriented defaults to shut them up. Read through the last few pages and you'll see the talk of how to tweak the governor settings to tradeoff between performance and battery life.
[Nexus 7 General] mk13139:
Ok, reading from the description of a29 it uses performance governor as default, so I assume it's powerhungry.

I don't like kernel tweaking myself, so i'm looking for a nice preconfigured one.

Maybe I should try Franco... I remember you can't just flash it like the others right? You need to wipe the cache first? Or was reverting to another kernel different..?
[Nexus 7 General] slybunda:
franco got best battery life when playing games too i noticed.
[Nexus 7 General] bjcrj:
Franco has a zip to flash for the latest version now. No need to wipe anything.
[Nexus 7 General] Metallice:
No it doesn't say that. Ondemand is still the default.

Sent from my Nexus 7
[Nexus 7 General] dstryrwiz:
I was gonna say...I don't know any developer that would ever default a kernel to performance.
[Nexus 7 General] mk13139:
You're right sorry I misread it.

Today I tested your kernel a29 and it drained the battery fairly quickly in comparision with Faux ES v13, motley 246, Franco r38 and your a28. Also in sleep it consumed noticable battery (7% in 10h).

After testing these kernels on performance and batterylife, I eventually chose motley to be the best balanced kernel, with faux as a close second.
[Nexus 7 General] simms22:
whomever decided that flash isnt working on trinity kernel is wrong, because flash works fine with trinity kernel. id like you to change that in your chart as you now have many believing that trinity kernel doesnt support flash, when it does. these people are avoiding trinity because of it. here is trinity kernel and the rasbean jelly rom, just to show you that it works fine and has always worked fine.

[YOUTUBE]NS5JId610Mg[/YOUTUBE]
[Nexus 7 General] lrefra:
I dont use trinity. I like more M-Kernel and dont have major problem with flash either (Flash videos work like your eg). But i have some glitches in the animations (eg advertising).

Motley and Franko work 100% without glitches in all webpages.

Webpage example:

http://www.oca.com.uy/

Again, I use M-Kernel a29 (i conformed as flash works with glitches and all) and i dont know if Trinity work 100% without glitches like Motley and Franko.

Pd. Sorry my bad english
[Nexus 7 General] simms22:
the only glitches ive noticed are in the full version of youtube in the browser, the controls are visibly garbled, but work as they should.
[Nexus 7 General] bcvictory:
I decided. And I have changed it.
[Nexus 7 General] lrefra:
Well, ask for simms22 for the web page (and video) and test in M-Kernel to :D

I bet it also works...
[Nexus 7 General] simms22:
thank you
[Nexus 7 General] lrefra:
I know. My celular sucks... But try yourself.

https://www.youtube.com/watch?v=UYOUIQcByEU
[Nexus 7 General] Cryingmoose:
For those of you who are anti-benchmark apps, would you consider using frames per sec. on FPSE as a "real world example"?
[Nexus 7 General] bftb0:
On the performance end of things, the most useful benchmark is simply the maximum clock rate (for either cpu or gpu, depending). Period. You don't even need to run a benchmark - just look up Fmax for the kernel(s) in question. Use Fmax for the cpu if the workload is cpu-bound, and use Fmax for the gpu if the workload is gpu-bound. Doing that will account for the lion's share of differences observed in either benchmark or "real world" results.

The difficulty with benchmarks is that measurement of a specific workload may not be a useful predictor of the "performance" of other workloads. So, there's no problem with folks measuring things; the risks come in making assertions that the benchmark used is somehow representative of results that will be observed with different workloads.

If you were only interested in frame rates (let's say you were a gamer), then what you suggest might indeed be predictive for that specific usage case... so long as the game(s) involved used the same libraries, are threaded the same way, and (therefore) roughly use the same percentage of gpu-vs-cpu as the benchmark app; otherwise all bets are off as we have kernels with different cpu-to-gpu clocking ratios even if the cpu Fmax is the same (for a specific paired comparison of kernels).

My point in the post above (at least for the performance end of things, not the battery testing) is that when you take into account the maximum clocking rates of the cpu(s)/gpu(s) for a given kernel, all of them are within spitting distance of each other - a few percentage points different from each other at most.

I'm not sure why that observation should be very surprising.

Want better gaming performance? Go and get yourself an overclocked kernel - and be prepared for the risks that come with that.

cheers
[Nexus 7 General] Milamber33:
Not disagreeing with any of the facts you stated, but if you're looking for 'the best', spitting distance isn't necessarily good enough for some people. This thread is about finding out which one all the others are spitting at. :p
[Nexus 7 General] Cryingmoose:
Is there any consensus on just how safe it is to overclock a Tegra 3?
[Nexus 7 General] Milamber33:
You're not likely to damage it by just overclocking. It's going beyond the stock voltages that's risky. Unfortunately, you generally need to up the voltage to overclock to more than about 1.4GHz.

That being said, the chips do have a decent amount of tolerance built in, so you should be fine using any of the kernels here with their stock settings. If you can't get it to the max frequency in any of them, or it's not stable at that frequency, just step back down one or two. In theory the life of the chip will probably be reduced a bit, but unless doomsday happens and we're all trying to keep things going in a post-apocalyptic world, you'll probably replace the tablet long before you need to worry about the slightly reduced lifespan of the chip. :)
[Nexus 7 General] R3dbeaver:
u need to test M-Kernel a30 by Metallice.

freakin butter.
[Nexus 7 General] EvanA:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

The benchmarks don't change much from a28 to a30. So it would be a mute point.

Sent from my AOSPA 3.+ and m-kernel a30 Nexus 7
[Nexus 7 General] tambourineman86:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

Using Bricked 0.58 with Max speed set to 1.55 ghz. I'd recommend this kernel.
[Nexus 7 General] slybunda:
done test on my nexus 7 16gb, full charge running BS player (hardware acceleration enabled) and stock android 4.2.1 streaming dark knight rises 720p, 6.5gb mkv file over the wifi from my home server, full brightness i looped the video, i get 5 hours battery life, so 2 cycles of the film before battery is down to 10%, not as good as the results posted here. since HW mode should have considerably better battery life, i would have thought id get atleast 9 hours.

may be possible on 0 brightness level.
[Nexus 7 General] VenomTheCat:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

Maybe if you don't stream the video
[Nexus 7 General] sparkerjc:
It's moot. I only say this so you don't use that spelling the rest of your life.
[Nexus 7 General] AZImmortal:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

Actually, it's moo. :p

https://www.youtube.com/watch?v=YIkJ4BUChxI
[Nexus 7 General] S3tArtist:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

Hehehe, good one :D
[Nexus 7 General] Raverbunny:
Poll doesn't have an entry for M-kernel??

Anyways, M-kernel + PA (with pro app) = buttery smooth goodness
[Nexus 7 General] azoller1:
leankernl is by far giving me the best battery life, and also intersect raven is doing very well, omeag gives me best performance
[Nexus 7 General] Deivi_Z:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

Could you provide more details?
[Nexus 7 General] Skyfall007:
@bcvictory... can you make a gaming test please? I think my battery is dead( i bought my n7 1 month ago) or n7 gaming time is horrible. Thanks a lot..

ps: test it on your actually kernel if you want to help me! Thanks again!
[Nexus 7 General] geoldr:
Ill have to try some of these out. I was using Bricked & Stock and when I was really busy my device would sit around and die after 10 days of no usage with everything off. I have an older Samsung Galaxy Tab and that thing can sit around for a month and not die
[Nexus 7 General] S3tArtist:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

Running PA with M-kernel a32. -1% of battery drop over night, with everything of, sleeping.

Do the math ;)

Sent from PAranoid Nexus 7 powered by M-kernel a32
[Nexus 7 General] slybunda:
need more battery life from nexus with screen on times. pointless going for standby world records.
[Nexus 7 General] S3tArtist:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

:) I think we all do.

With almost default kernel M-kernel settings and PA more than 6 h in first battery cycle. Not bad, but it can be improved.
[Nexus 7 General] siddesu:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

FWIW:

usage:

I run the stock rom, chips are neither oc-ed, nor uv-ed outside of the default settings. I mostly do browsing (opera), reading (fbreader, ezpdf without effects), note-taking (freenote pro), some GPS track recording (locus pro, runtastic), access some social sites via seesmic.

Screen on times, from full to about 20%, wifi and bt on, switching them off when tablet is sleeping. About 35 services running typically.

motley, ondemand: 5.5 hours

m-kernel a30, ondemand: 5.5 hours

M-kernel a32, touchdemand, 6.5+ hours

franco, stock: ondemand, 4.5 hours.

gave up on franco because I was seeing some badly jagged pen strokes, and I write a lot. not sure if kernel-related, but have not seen the same with any of the other kernels.
[Nexus 7 General] afbengochea:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

I'll just leave this here. Granted I just used it for ereading since was studying for a board. Rascarlo plus Franco kernel
[Nexus 7 General] VenomTheCat:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

Wow was that with everything off and minimum brightness?
[Nexus 7 General] afbengochea:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

Everything off, on autobrightness, the only thing that might have been syncing is gmail
[Nexus 7 General] bcvictory:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

Sorry guys, been at a youth camp for the week. Completely behind on everything. Catching up now.
[Nexus 7 General] Matteom789:
hi guys, a little question..

does the kernel mount the external usb drive?

Because I have a nexus 7 with paranoid android and when i plug in an external drive without stickmount or other, the OS mounts it.

To unmount i have to go to settings-memory.

But if I plug in an NTFS drive I need stickmount!

Changing kernel it might change or it is a kernel issue?
[Nexus 7 General] bsoplinger:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

I doubt your kernel has support for NTFS built into it which is why you need StickMount. If the Nexus doesn't think there's a valid file system on the device it won't mount.
[Nexus 7 General] piupiu piu:
Update this topic please. Also what is buttery tweaks?
[Nexus 7 General] davisac:
http://xdaforums.com/showthread.php?t=1855100
[Nexus 7 General] bcvictory:
Halfway through testing the updates to the kernels. I think the only ones updated since last time are:

Franco r41

M-Kernel a33

LeanKernel 1.2

IntersectRaven

Trinity a4

and Omega r4
[Nexus 7 General] cfmusicman:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

Can you test the omega 3 kernel please
[Nexus 7 General] NoobNeutralizer:
.......

I've tried franco.Kernel and M-Kernel...

I tend to lean a bit towards M-Kernel being my favorite one...
[Nexus 7 General] jamm513:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

This is from my N7 whit latest faux beta (Butter, performance and great battery life):

Sent from my Nexus 7
[Nexus 7 General] tkelly0727:
can i ask what theme is that ?
[Nexus 7 General] bolanrox:
Re: [GUIDE] *NEW* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tests)

I am liking m-kernel, minus the r33 SOD issue back on r32 again.

Sent using tapatalk 2
[Nexus 7 General] bcvictory:
I've updated/added:

M-Kernel a33

Franco r41

Trinity a4

LeanKernel 1.2

Omega 4

Faux 14b3

IntersectRaven 20130120_11XX

Saber Toothed Squirrel 3.7

Phew, I think that's all kernels up to date. I've updated the spreadsheet and the overall results.

I also had an idea to take the 'best' kernels for battery and performance and try to 'make them better' with changing some governor numbers or other ways like Pimp My Rom or something like that. Ideas would be great!

Also I have been thinking about doing a 'best' rom or comparison chart or testing them somehow.

Just an idea. If you like what I do, hit the thanks button. If you want to of course. :)
[Nexus 7 General] Trewyy:
Sweet, thanks!

Here's an idea for your chart, though.

Currently your chart "total" column factors in both the overclocked and regular speeds/battery. I think it'd make more sense to have two "total" column's, one that is a total of the regular 1.3GHz battery + speed, and a 2nd column that is a total of the overclocked kernel battery + speed. After all, people are either using a kernel overclocked, or stock, I don't know to many people that switch in between too often.

I say this because I don't overclock, so I couldn't care less about a kernel's overclocked speeds (the stock speeds doing everything buttery anyways). For me, the kernel of choice would be Franco, M-Kernel, or Omega (I'll have to give Omega a spin after these new results). For those who overclock, on the other hand, and want "maximum" performance, would be in M-Kernel's base (decisively after these new results, actually).

This round of results isn't a great one for me to use an example, mostly because M-Kernel dominates overclocked and stock speed (good work, Metallice!).

Thanks for your hard work!

Rob
[Nexus 7 General] bcvictory:
Good idea! I'll add it in now.

Omega has really surprised me.

For it to be that good after only 4 versions is pretty impressive. It's really buttery too!

It's only got a little bit of catching up to do (to M-Kernel & Franco)
[Nexus 7 General] Trewyy:
Awesome, again, thanks for your hard work!

I have one last suggestion, and that has to do with how kernels are ranked. For example, in the 1.3 stock performance section, we can see that Trinity, Faux, and Franco all pull almost identical scores (13996, 13972, 13954 respectively). The score difference between Trinity and Franco is only 42. That's only a 0.3% improvement in performance between the kernels, and that's in a test that fluctuates significantly (take the test multiple times on the same kernel and you sometimes find score differences can vary in the hundreds each time, as you well know). What I'm getting at is that these three kernels essentially tie each other for first, M-Kernel and S-T Squirrel (maybe even Omega) would take second, and so on.

I'm just worried that something like a 0.3% difference is over represented on your chart, where 1 point could make it or break it for a kernel in the standings.

Let me know what you think :) and, again, I cannot over emphasis how grateful I am for your work :)

Rob
[Nexus 7 General] bcvictory:
Suggestions are great. I could try that. And I do take the test 3 times and average it.

P.S I added your last suggestion in. Very interesting.

It seems the best kernels for 1.3GHz & under are: M-Kernel & Franco

And the 'best' for 1.6GHz is Omega.

But your new suggestion might change that.
[Nexus 7 General] VenomTheCat:
Re: [GUIDE] *27/1 UPDATE* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tes

I don't think I like the idea of the enhanced battery life because having the clock speed at 51 min and 110 max you can also reduce the max cores to 1 and under clock the **** out of the GPU while the screen is on minimum brightness but the problem is that there is no way to really know if this is practical with out being subjective!

But if its just for laughs then by all mean go ahead but I think you run the risk of diminishing the credibility of the thread
[Nexus 7 General] RootTheMachine:
Re: [GUIDE] *27/1 UPDATE* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tes

I kind of agree. I think it makes the most sense for these tests to show what you get with each kernel right out of the box. Whatever settings you tweak beyond that are totally up to the user and what they want specifically from the kernel.

Although there may be some validity to these tests, for example, many users might want to see how much better battery (and loss in performance) you can get by limiting it to 2 cores. Only certain kernels allow this, giving them a potential advantage there.
[Nexus 7 General] NicoGa:
Tegra 3 incorporate a fifth core (LP core) which is said to be more efficient than the other four cores. However, not all kernel developers believe in that. While most kernels depends on the usual 4+1 approach, some kernel such as Franco kernel do not use the fifth core at all (while having an excellent battery life in benchmark such as yours and in real life - on par with M-Kernel).

So, in order to compare the LP core, it would be very interesting to achieve a similar test, but using only 1 core and limiting the frequency to the standard maximum value used by the LP core (ie 475 MHz I think) such as only the LP core is triggered in kernels that use it (both can be done with the app Trickster Mod).

To go further, the advantage of overclocking the LP core, such as in M-Kernel, could also be evaluated by staying on 1 core but increasing the frequency at for example 620MHz.

This would allow to better appreciate the efficiency of the LP core, which I think would be very very helpful for everybody.
[Nexus 7 General] bsoplinger:
Re: [GUIDE] *27/1 UPDATE* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tes

Forgive if this is considered too far off topic for the thread but I have a few questions…

The kernel is actually just 1 file on the phone isn't it? I ask because I can always do a nandroid backup before I try any of these kernels but that seems extreme if it really is just 1 file, even if it is a special file. Is there a better way to backup the existing kernel so it can be restored other than a nandroid backup?
[Nexus 7 General] piupiu piu:
pure gaming and browsing with no screen/off and wi-fi/on

M-Kernel

pa/pie 3

1.3 ghz
[Nexus 7 General] VenomTheCat:
Re: [GUIDE] *27/1 UPDATE* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tes

Unless you waant to keep an easy way is getting back to the stock kernel there is no need to make a nandroid backup before flashing the kernel if you want to change of go back to another you just flash on top of it. It takes less than 30 seconds
[Nexus 7 General] bsoplinger:
Re: [GUIDE] *27/1 UPDATE* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tes

Actually it was the stock kernel I had in mind since that's what's I'm currently running. Figure if I'm underwhelmed with the custom choices I'd go back to stock. Perhaps I'd be better off asking for a flashable 4.2.1 stock kernel instead of a backup method.
[Nexus 7 General] VenomTheCat:
Re: [GUIDE] *27/1 UPDATE* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tes

If you find the flashable stock kernel let me know where!

Also I really doubt that you will want to go back to the stock kernel since more options better performance and better battery life all in one is really hard to pass

Stability is also nothing to worry about because issues are solved quickly and you can always go back to another kernel or a previous version

I had the same worries and even wanted to go back when I first changed over but that quickly went away
[Nexus 7 General] aaronpoweruser:
Re: [GUIDE] *27/1 UPDATE* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tes

Back up your boot partition that is where the kernel is stored.
[Nexus 7 General] ynksbsbll2:
kernel wakelocks

This is a great comprehensive look at the different kernels, I'm really glad I stumbled onto this thread. I've had few complaints with my N7, however I've noticed a ton of "wlax_rx_wake" kernel wakelocks in BetterBatteryStats. I've searched all over the place and tried all the supposed remedies without much luck, so I was hoping someone here might be able to glean some insight into how to resolve this.

I get the sense that I shouldn't be draining 1% an hour while I'm at work and my tablet is at home. Maybe this is normal, but I'm certain I recall people claiming fractional amounts of drain over a similar 10 hour period or so. Obviously I could just turn wifi off and that would probably fix it, but doesn't really solve the root of my issue. Anyways, if anybody has found the right fix I'd appreciate the help. Thanks again.
[Nexus 7 General] bcvictory:
Re: [GUIDE] *27/1 UPDATE* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tes

http://forums.androidcentral.com/verizon-droid-dna/245376-msm_hisc_host-wlan_rx_wake-wakelocks.html

That might help you. I think it's something to do with an I.P address.
[Nexus 7 General] ynksbsbll2:
Thanks for the quick reply. That's actually my test for tonight. I gave my phone a DHCP reservation on the router side and set the IP as static on the phone side. We'll see how it works out.
[Nexus 7 General] piupiu piu:
Why when I taste my n7 at antutu i get 2434 and next nuber is 2200 l mean wtf?! Where my 200 points disappear?
[Nexus 7 General] Inforc3r:
Thats totally normal. One time u get more points and the next test run you get lower or more. Thats why Benchmarks not make much sense in my eyes.
[Nexus 7 General] jamm513:
Aventador :highfive:
[Nexus 7 General] bcvictory:
Re: [GUIDE] *27/1 UPDATE* 4.2.1 RESULTS! N7 'Best' Kernel? (Performance & Battery Tes

Thanks for the loooonnngg post, just woke up so the TLDR version was good. I just read the full thing again. So basically, you want me to use stock as a base and do a percentage of how much better the other kernels are?
[Nexus 7 General] bftb0:
:D

Only if it makes sense to you to do so - you are the OP after all ;)