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NOOB question: overclocking, Mhz, JIT

hey guys,
looking to make the jump to 2.1 rom (most probably htcclay). but ive been looking at alot of different threads and i'm seeing a lot of comments regarding overclocking, setcpu, 528Mhz, 710Mhz, and JIT.
I'm trying to make sense of it all and want to know how to understand it properly. can anyone help? or point me in the right direction with a link explaining stuff?
im currently using a 32A magic with the old radio =)

Noob tries to help noob:
MHz refers to the frequency of the CPU. This reflects the speed at which operations are executed on an overall level. The original HTC Magic ROM was around 312 MHz if I remember correctly (which was in fact underclocked). Then the threshold was pushed to original frequency (around 512 MHz).
However, the frequenzy is not fix but rather adaptive in a range (speed stepping). If an application requires CPU time, the frequency goes up to those values indicated in the paragraph above. When the processor is idle however, frequency goes done to somewhere around 200MHz to save power (as higher MHz consumes more power).
Therefore 710 MHz reflects the upper limit of the range and is beyond the factory 512 MHz. Thus you gain roughly 30% peak performance.
JIT: Just In Time compilation. Another way to compile the Java code . This methode is introduced by replacing a library in the system and available in ROMs >= Android 1.6 . The performance gain is said around 30% but... I don't now whether this affects only apps or the overall system.
Hope this helps (probably not all numbers given are correct, but the concept should be).
Romwise I stick with Sanpei's Eris port. Not overclocked but smooth and good for everyday live

thanks for that dude! that makes a hell of a lot more sense to me =)
i popped the htcclay 2.1 rom from for 32A on last night and its working a charm. i set the frequency to max 528MHz, and min 245Mhz.
Is there any recommended settings to optimize the battery life so you can use it as an everyday rom? I grown quite fond of android 2.1, and the launcherpro beta is SO fast.
i know the whole idea of SetCPU is to customise whats right for you, but because I'm knew to all this I just need some direction as to what the best general settings are

Yes the non-sense 2.1 ROMs are speed wise amazing. I missed the HTC dialer though. I like to be able to type names on the keypad which is - to my knowledge - not possible on standard dialer. Also the HTC calendar app is a thing I havily rely on and the 2.1 Andorid Calendar is simply crap in comparison. That's why I stick with Sense ROMs.
However, speaking of overclocking. There is now clear rule. To factors affect your choice: your phone usage pattern, the individual quality of your hardware.
Hardware Quality: Processors and boards are guaranteed to operate flawless in a certain frequency range. Most processors can handle more that guaranteed (because there is a safety margin introduced by the factory) . However, how much more the processory can actually handle (before it starts to throw errors and faults) is rather individual.
Usage pattern meaning: if you're a havy gamer and you play ressource hungry games you will put the upper threshold as high as possible (however, you might also consider buying an XBOX which is more fun). Also if you feel that your phone response is sluggish. But, as long as you feel fine with the response of your phone, I would not go up with frequency (not for power reasons, rather stability of the OS). Go up if you feel that you need more processing power.
The lowest threshold is probably 128 MHz. I never tried that because I read of phones which would not wake up after having gone in standby. This is not dangerous (you only have to reboot) but personally I cannot afford to miss a call because of that. So I stick above 200.
Regards,
F

well in regards to my usage pattern, i dont play any games on my phone at all. for the reason being i dont want it to consume battery on the handset.
i dont even use it much for calls. i do a LOT of sms, facebook, youtube, emails, and some widgets which requires data usage. so what would u recommend for something like this? i want the rom to be zippy, not sluggish, but not drain the battery too fast?
and how do i know which operations/apps require CPU time?
no doubt about sense-ui is amazing! im even thinking of getting a htc desire soon, or just seeing what else is coming out soon. which model of phone are u using the sanpei eris port??

32A, New Radio. Use Radio Switcher from eyegor: Sticky Post. Works like charm but be careful and read the instructions (or you might end up buying a desire sooner than you intended to). I am usind a partitioned SD with EXT 3 System for apps2SD and a cache partition. SD can be formatted this way from Recovery.
I think Sanpei's Eris is the best 2.1 compromise for the time being. However, based on your comments on how you use your phone, probably you even don't need 2.1 and are fine with 1.5. Then try this (this is also for the new Radio: use Radio Switcher)
Cursorsense's 1.5 (Most solid build I know of)
http://forum.xda-developers.com/showthread.php?t=592856
Then before booting flash this:
http://forum.xda-developers.com/showthread.php?t=681378
Boot and fasten your seatbelt. It's not as fast as HTCClay... but its the closest experience you can get with any Sense ROM...
Regards,
F
PS: Probably there is a huge flame coming our way for off topic discussion. I guess we have to stop. Going for cover

LOL! ur help has been awesome my friend =)

LOL! ur help has been awesome my friend =)

I would recommend you use cyanogenmod 5 if you want stability
sense roms cannot compare to AOSP roms for stability because they are a proprietary framework which cannot be updated unless htc releases a new version
and CM 5 is the fastest eclair rom I have tried - faster than even donut roms

i wouldnt go with 1.5....there are to many apps/widgets that wont run...
i would recommend cyan's latest 1.6 rom, 4.2.15.1 .. stable (better than stock roms), fast and has great battery life...
if you must get 2.1 then go for cyan's latest 5.0.7 test6 2.1 rom, or sanpei's if you must really want sense...
i run cyan's latest 2.1 rom and its stable as hell, as fast as his 1.6 rom, rock solid and great battery life..
ultimately its your choice.. i would stay away from JIT though, to unstable...

feicher said:
Yes the non-sense 2.1 ROMs are speed wise amazing. I missed the HTC dialer though. I like to be able to type names on the keypad which is - to my knowledge - not possible on standard dialer.
Click to expand...
Click to collapse
try DialerOne, it has the "keypad-T9" function and is free on the market
the only downside is it's really not as pretty as the sense dialer(feels a little clunky and outdated)
as far as the ROM goes, i'm using alan090's modded CM5 t5 right now, OC'd to 710MHz and with JIT enabled. best rom i've had so far, really snappy and stable. JIT seems to be very stable on my phone, i wasn't even sure i had enabled it correctly at first.. until i ran linpack and got a good 4.5 MFLOPS

I have a somewhat related question:
should i be afraid of a overclocked cpu rom heating wise? sometimes i feel my phone heating a little and i am using a default speed rom.

CPU Tuner - Battery Saver

Guys, look that...it seems to be nice...I installed and im still testing...Some users said this app helps to increase the battery life in almost 25%....I liked the UI also, is very very nice...
Im going to test...
Share your results....
http://www.appbrain.com/app/cpu-tuner-(rooted-phones)/ch.amana.android.cputuner

u know which frequency to set

dennka said:
u know which frequency to set
Click to expand...
Click to collapse
My kernel does not allow me to change the frequency....
Need to change...By the way...I notice the phone become a quiet slow with this app...

same here, I cannot change settings, however, I do not find apps running slower or the whole sys response got worse

There is no way a cpu tweak can save you anywhere near 25% ...
The screen uses about 80-95% of the battery even with a 1.2ghz overclock cpu doesn't make near that much of a difference...
Sent from my SAMSUNG-SGH-I897 using XDA App

It's funny because I thought the screen was a new technology super battery-saver lol and it's clearly not
However, the Wave who have 0.7 smaller screen but the same technology have a battery like 3x times better.
the difference? the os. I'm pretty sure the problem comes from the Android and nothing else.

I would second android being the culprit....considering most of us are running leaked 2.2 battery management has not been fully implemented. I had great battery life on jh3 and jh7...... but I would never go back to eclair to get better battery life. The epic is starting to get.official froyo and I read that Canada should start seeing froyo this week......all we need is for att to get on the ball and Samsung to release their source code
Sent from my SAMSUNG-GT-I9000 using XDA App

hey guys,
does anyone have an older version of this app. It used to work great for me, but with the latest updates it has not performed as well.
thanks.

Actually the 1.0.1 version is really good. Here is a guide how to use it:
linux-tipps.blogspot.com/2010/12/make-your-android-power-efficient-in.html

*** Adrian *** said:
My kernel does not allow me to change the frequency....
Need to change...By the way...I notice the phone become a quiet slow with this app...
Click to expand...
Click to collapse
change the settings(current governor: conservative into PERFORMANCE
Sent from my SAMSUNG-SGH-I897 using XDA App

I haven't tried it yet. But if I understand what it is by the name I don't think it will help that much. Android OS already changes frequency based upon usage. You can see these percentages in the Android System Information app. For example, mine reads as follows:
1000.0 MHz 3.19%
800.0 MHz 6.49%
400.0 MHz 5.5%
200.0 MHz 9.58%
100.0 MHz 75.13%

[Request] The overclock text file required by SetCPU

I need it to overclock my phone, but I would rather not mess it up myself. Many thanks
Sent from my HTC Sensation Z710e using XDA App

Have U not been reading the Dec thread. Don't overclock. Set CPU limits the 2nd CPU to 1 ghz and only overclocks one core
Sent from my HTC Sensation Z710e using XDA App

Knucklessg1 said:
I need it to overclock my phone, but I would rather not mess it up myself. Many thanks
Sent from my HTC Sensation Z710e using XDA App
Click to expand...
Click to collapse
you do not need that text file. If the kernel supports overclocking, you're good.

nugzo said:
you do not need that text file. If the kernel supports overclocking, you're good.
Click to expand...
Click to collapse
I'm sorry if i was not clear. I meant i wanted to overclock my phone with SetCPU, but it requires a text file because it hasn't been added to the presets yet.

nugzo said:
you do not need that text file. If the kernel supports overclocking, you're good.
Click to expand...
Click to collapse
maybe i wasnt clear. you do not need that text file. If the kernel supports overclocking, you're good. If it doesnt not support overclocking, the text file wont help.

No point, dual-core overclocking has JUST come onto the development scene for the sensation, and it has lol-bugs and is definitely inconsistent for everyone. Until all that can get hammered out, there is no point to overclocking, unless you are one of those nightly guys (I am )
The first thing is that only 1 core gets overclocked, beyond that, only 1 core is active for the majority of the time on the Sensation.
Benchmarks aren't even accurate because benchmarks like Quadrant don't even activate the second core.
However, if you want dual-core active all the time, I recommend flashing ARHD 3.0.3 with the dual-core script. It does work.
Faux Kernel 0.0.8 has come out which offers dual-core overclocking, but it does come with it's own handful of problems. Many are reporting boot-loop issues (IMO it's due to the kernel being somewhat unstable as well as setting too high of an overclock for initial settings) You need to flash the kernel as well as the dual-core script and then manually edit the script in system/etc/dual-core/main_script to set your clock speeds.
I'm going to also repeat what the other said.
SETCPU AUTOMATICALLY DISABLES ONE CORE AND DOES NOT OVERCLOCK IT NONE of the overclocking apps are dual-core ready. Heck, Android OS isn't even ready for dual-core. There have been lots of workarounds to get dual-core supported on these devices from the "factory" itself.

[Q] How to overclock Desire s?

Hi,
I'm quite new to Android and forum, but within 15minutes I S-offed and rooted my phone. I still don't know how to overclock the desire s. I used "search" but I found nothing. Could anyone help me and either write me an intruction what to do step-by-step or provide me with appropriate topic? I'll be greatful!

TheLittleNick said:
Hi,
I'm quite new to Android and forum, but within 15minutes I S-offed and rooted my phone. I still don't know how to overclock the desire s. I used "search" but I found nothing. Could anyone help me and either write me an intruction what to do step-by-step or provide me with appropriate topic? I'll be greatful!
Click to expand...
Click to collapse
You'll need a combination of a custom KERNEL (that supports O/C) and a custom ROM (some come with an O/C daemon built in)
time for some reading.

Ok, so one more question just in case. May I use any ROM with any kernel or I have to match ROM to kernel (or opposite)?

Generally I would say custom roms come with the most suitable kernel.
The easiest way to overclock is to simply download an app from the market that will o/c your cpu.
Peace
Sent from my HTC Desire S

If your new to all this are you really sure you want to start overclocking?
Sent from my HTC Pyramid using XDA App

ben_pyett said:
You'll need a combination of a custom KERNEL (that supports O/C) and a custom ROM (some come with an O/C daemon built in)
time for some reading.
Click to expand...
Click to collapse
Although I'd also as that unless you'r e intending on playing games then the desire s should be fast enough without over clocking as ultimately that will reduce battery life.even the sense 3 rooms when configured and optimised correctly don't lag at normal operating speeds
Swyped from HTC Desire S using XDA Premium

You're still on stock ROM right?
If so, install this kernel from recovery and SetCPU once done. OC away.

If i want to overclock my desire s, does it effect my phone?

nartz said:
If i want to overclock my desire s, does it effect my phone?
Click to expand...
Click to collapse
Yes, it would go a little faster
Seriously tho, it might run a little hotter, for a shorter length of time, and be slightly less stable - all depending on how much you overclock it, what settings you use, etc.
Try downloading an app from the market that will overclock your cpu and see what happens.
Sent from my HTC Desire S

And NEVER max the oc setting. Some kernels allow up to 1.7ghz but your phone would be fried in a week and be incredibly unstable. Can't recommend going past 1.2ghz if you want your phone to last til your next upgrade date. For the most part though, oc is unnecessary on this phone.
Sent from my HTC Desire S using xda premium

wnp_79 said:
For the most part though, oc is unnecessary on this phone.
Click to expand...
Click to collapse
Gotta agree there. Stock CPU settings are more than adequate for any use.
Sent from my HTC Desire S

chris5s said:
Yes, it would go a little faster
Seriously tho, it might run a little hotter, for a shorter length of time, and be slightly less stable - all depending on how much you overclock it, what settings you use, etc.
Try downloading an app from the market that will overclock your cpu and see what happens.
Sent from my HTC Desire S
Click to expand...
Click to collapse
I just read somewhere in other forum, if I overclock my phone, I will have problem on my phone.
Maybe because of the cpu overheat or what?

Basically, yes.
Why not use the phone as it is, and see how you like it? If you do decide to overclock, do it in small increments. Honestly, I find it fast enough at normal speeds, playing games, browsing, etc.
Peace
Sent from my HTC Desire S

chris5s said:
Basically, yes.
Why not use the phone as it is, and see how you like it? If you do decide to overclock, do it in small increments. Honestly, I find it fast enough at normal speeds, playing games, browsing, etc.
Peace
Sent from my HTC Desire S
Click to expand...
Click to collapse
+1 to you. 1Ghz already fast enough. No lagging at all like some other phone.
v(^_^)

I was quite interested in this overclocking buisness. I overcloked my phne to 1.7ghz, used it for a while and it froze twice, requiring a reboot.
There was definitely a speed incresas, but 1ghz on lbc mod is already plenty smooth!
Now I've set up setcpu profiles to have myphone only overclocked at 1.2ghz when its chargingand I'm using it. But also a profile to limit the temp at 41degrees to 825-245mhz.
But when its unplugged, u have left it on default at 1024-245mhz on demand. Great battery life compromised with great speed.
Sent from my HTC Desire S using XDA Premium App

Maybe you'll need a voltage bump at 1.7GHz. But even if it's stable, it will definitely be hotter. Not good for long term.
1.1-1.2GHz should be stable for daily use.

[Q] Galaxy s2 stable overclock to 1.6 ghz?

Hello,
I just installed the ressurection remix 1.5 rom, in combination with Thoravukk kernel, and i set my cpu to 1.6 ghz.
Set it at boot, and rebooted the device.
I'm really impressed about the boot speed, and overall smooth scrolling etcetera.
My question is, is there something else i need to do to keep it stable, or change other settings, like voltage, gpu, ram or anything else?
Because i'm really happy with the changes it's given me, but i don't want problems in a while.
Batterylife is not an issue, i don't expect it to last as long as it did on 1.2 ghz
Looking forward to information.
If i don't need to do anything else, i would like to know as well.
Thank you

Lost in space xD
Can any one help me with some info on where can I download the Thoravukk kernel. I've entered around 3 or 4 (including the official team blockbuster) sites and I don't see any download links

Why do you have it overclocked to 1.6? is there even a difference in performance? The phone's so powerful already lol, you could UV for better battery life, increase gpu for performance (in games) I don't think you need more Ram, I have the OG epic 4g and I have plenty lol
As far as stable, pushing your processor may create problems that you won't necessarily see at stock frequency, you get what ask for.
Sent from my SPH-D700 using xda premium

Fire n mage said:
Why do you have it overclocked to 1.6? is there even a difference in performance? The phone's so powerful already lol, you could UV for better battery life, increase gpu for performance (in games) I don't think you need more Ram, I have the OG epic 4g and I have plenty lol
As far as stable, pushing your processor may create problems that you won't necessarily see at stock frequency, you get what ask for.
Sent from my SPH-D700 using xda premium
Click to expand...
Click to collapse
Exactly what I had in mind
The Note is plenty powerful even amongst the current crop of droids. And no app requires a dual-core 1.6Gghz. The stock frequencies were chosen for a reason, I'm guessing it's quality. All chips burn out in time, they have a lifespan. But you overclock your device and you burn your chip faster.
So what I'm saying is stay with the original frequencies. Port an optimized ROM and that should suffice.

Thanks for your answers, but i really notice the differenct, especially with a reboot, it normally takes 30-40 seconds, and now in less then 10 secs i'm at my home screen, and ready to go.
Also it is smoother with scrolling, and apps launch even faster.
so the diff is hugh to me.
Battery life is not an issue, i said, even if it goes to crap, i replace it for €20,- (Just about $25,-)
And the performance is nice, but my question was if i have to set other things.
And i use lulzactiv governor, it uses only what it needs, it's not always the full 1.6 ghz. Only when speed is preferred.
@Kenepo112x40 this is where i found it, i use it now, so it works:
http://forum.xda-developers.com/showthread.php?t=1574672
Edit: There's a zip in attachment, that's the one, install in cwm recovery

SGS2-1989 said:
Thanks for your answers, but i really notice the differenct, especially with a reboot, it normally takes 30-40 seconds, and now in less then 10 secs i'm at my home screen, and ready to go.
Also it is smoother with scrolling, and apps launch even faster.
so the diff is hugh to me.
Battery life is not an issue, i said, even if it goes to crap, i replace it for €20,- (Just about $25,-)
And the performance is nice, but my question was if i have to set other things.
And i use lulzactiv governor, it uses only what it needs, it's not always the full 1.6 ghz. Only when speed is preferred.
@Kenepo112x40 this is where i found it, i use it now, so it works:
http://forum.xda-developers.com/showthread.php?t=1574672
Edit: There's a zip in attachment, that's the one, install in cwm recovery
Click to expand...
Click to collapse
I had to go and look for the 2.30 on another post cuz the 2.41 doesn't allows me to have data on the phone. Thanks anyway man, the problem was that they hadn't uploaded the link yet on the official site but they did yesterday.

To OP, I suggest u increase voltage at over locked 1.6 to keep it stable