Hi guys!
I have now confirmed through the cpuz app and antutu , that the power saving mode only uses a7 cores (not more than 1200mhz) and leaves the a15 unused no matter what the CPU requirement is.
This experiment was done in the latest MEA firmware for i9500.
I have also figured out that there is some CPU throttling going on with the latest firmware when the temp reaches 50, the a15 cores were not used in the antutu benchmark. This is also why I got an extremely low score of 22000 and then got 17000 in the second test as the CPU was heated. As soon as the CPU cooled down to 40, the cpuz app again showed all cores reaching 1600mhz when running the test in background.
These are my own findings and I apologize if this is known to everyone because I certainly didn't know that.
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plasmastate said:
Hi guys!
I have now confirmed through the cpuz app and antutu , that the power saving mode only uses a7 cores (not more than 1200mhz) and leaves the a15 unused no matter what the CPU requirement is.
This experiment was done in the latest MEA firmware for i9500.
I have also figured out that there is some CPU throttling going on with the latest firmware when the temp reaches 50, the a15 cores were not used in the antutu benchmark. This is also why I got an extremely low score of 22000 and then got 17000 in the second test as the CPU was heated. As soon as the CPU cooled down to 40, the cpuz app again showed all cores reaching 1600mhz when running the test in background.
These are my own findings and I apologize if this is known to everyone because I certainly didn't know that.
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Thanks mate, I didnt know this either! Good find :good:
not just in powersave mode. I have the same results with power save off
Does this mean essentially only the A7 cores are ever used?
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thelestat said:
not just in powersave mode. I have the same results with power save off
Does this mean essentially only the A7 cores are ever used?
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Try running the antutu app test in background and start the cpuz app. Look for change in the CPU clock. Are you sure it doesn't show anything more than 1200mhz?
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thelestat said:
not just in powersave mode. I have the same results with power save off
Does this mean essentially only the A7 cores are ever used?
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No.
A7 is used dominantly because many conventional software tasks do not need the muscle of the A15.
There are other issues as well... just give the ROMs time to improve.
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there are no such throttles at 50 C, but the boost mode is disabled by default it seems i can see antutu topping at 1.4 ghz not more than that..
I got 26764 in antutu using power saving mode. The highest freq used when running antutu is 1400 (check using cpu spy).
After checking whatsapp and xda app, I check freq 1600 is also used. So it is not limited to A7 in power saving mode.
Note: I use perseus 2.1 and MEA.
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bala_gamer said:
there are no such throttles at 50 C, but the boost mode is disabled by default it seems i can see antutu topping at 1.4 ghz not more than that..
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Can you please tell us more about the boost mode?
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it does show more that 1200mhz for a second or two on the first test . The cpu gets instantly throttled though (as the temp rises).
Then subsequent tests show 1200 or less.
To answer my own question, yes this does meant essentially only the A7 cores get used. Because any sort of load on the A15 causes a temp rise, which causes an auto throttle down to the A7.
Even if you fix the minimum cpu speed to be > 1200, the rom disregards youw minimum and drops lower. E. g. I fixed the minimum to 1300, ran antutu (The results were significantly better than the stock cpu settings) however near the end of the test the cpu was auto clocked down to 1000 and stayed there on any subsequent antutu tests.
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plasmastate said:
Can you please tell us more about the boost mode?
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samsung uses boost mode to increase throttle temp limit from 90 c to 100c in order to stay longer at higher clocks for better bench scores, when the boost mode is disabled the clock speeds will start reducing by 200mhz steps when the temp touches 90c.
Bala Gamer you know any program can log the temp while playing or bench?
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Related
I'm having an issue with my phone not being responsive if I set the CPU to 400Mhz. I first found this problem using Juice Defender then I uninstalled that and did it under SetCPU and it still did the same thing. The phone pretty much doesn't wake up after a while. I have to do a reboot in order for it to work again.
Don't get mad at me but IMHO overclocking and messing with a phones core features (what makes it run, processor, ram, etc.) is unsafe and can cause instability. And no I have no scientific research to back this up but it's just my two cents.
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Lol I'm not mad. I don't really like to over clock. I just figured under clocking would work better. But nooooo lol
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It does that under 800 mhz I forget why but I've read that in a couple places
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underclocking that much is using less than 1/3rd of your true processor power.
your processor simply is not able to draw enough power to perform its background tasks - even when the phone is idle - when you underclock to such an extreme extent. therefore, it freezes trying to complete these processes.
if you're going to underclock, i'd say that 800 MHz is the lowest you can go if you are expecting your phone to do everything it is supposed to do. although it isn't going to save you THAT much battery life anyway, so you might as well just run it at the stock setting of 1200 MHz.
Focustom said:
Lol I'm not mad. I don't really like to over clock. I just figured under clocking would work better. But nooooo lol
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I understand LOL. And he's right underclocking honestly doesn't
Save much battery.
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There's a known issue with setting CPU profiles to less than 800 MHz. A fix exists but some kernels don't have it.
Many of our Gingerbread kernels fix it, Infusion-GB is one of the few that hasn't pulled in the fix yet. (Although version 1.1 may have pulled it in, haven't checked github lately.)
None of the Froyo kernels have an explicit fix, but I'm not sure if the flaw even applies to our Froyo kernels as the clocking architecture is VERY different.
Hi, Rogers stock 2.3.3
It's using up 60% battery over night. Most likely I should turn off Wi-Fi.
I have underclocked to 100, 200, and 400 and it's stable --- minus the delay/lag at 100 and 200 . Sorry to seem like a troll.
I find that by default this phone either runs at 100mhz or 1200 on average, and 200 400 800 under 10%
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ierdna said:
Hi, Rogers stock 2.3.3
It's using up 60% battery over night. Most likely I should turn off Wi-Fi.
I have underclocked to 100, 200, and 400 and it's stable --- minus the delay/lag at 100 and 200 . Sorry to seem like a troll.
I find that by default this phone either runs at 100mhz or 1200 on average, and 200 400 800 under 10%
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Bumping from 100 to 1200 is classic ondemand governor behavior.
Also, some people never had problems even without netarchy's sleep patch running the CPU capped to 400 - but others have. I don't think anyone has had a problem with a patched kernel.
Hi Guys I have a Galaxy S 4G I have noticed that max stable overlclock is 1.508Ghz If I bump up to 1.516Ghz It is stable but at watching videos for a long time it crashes, I have noticed that the normal max temp is below 60 C or 55 C, that's stress testing for long time, normal everyday is 41~43 or, I Think It can go higher but I t would need 1500mV or 1600mV core Voltage also to achieve 1.6, 1.7 or 1.8 even 2.0Ghz It takes 1600mV or 1800mV, temps would be 45~47 normal, and above 60~65 on stress testing. But tegrak doesn't support these volatges, It would need to tweak the code. With proper cooling temps can go down to 33 or 30, lets say using the phone in a cool room.
Do you know when are they gonna support higher core voltages(Tegrak OC)?
Do you really need to oc that high?
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Exodian said:
Do you really need to oc that high?
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At 1.5 is goood but for proper PC like performance it would be a bit higher.
2.0ghz would beat samsung sgs2
I know anything higher than 2.0Ghz the phone would suffer, I don't know if the main board can support 2.5Ghz or 3.0Ghz. The battery doesn't handle that much power not even 3500mah battery
Mine runs stable and quite cool @ 1.62 and I get 4128 quad score, but I have no need to oc the phone with all the tweaks.
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Thanks I'm gonna try out your setup, but that's the highest it can go?
I get a max of 2300+ because I have no tweaks and I am at Stock 2.3.5 UVUKJ3
I really don't see the need for oc other than for playing a REALLY graphical intensive game. For me, I get a better performance boost from the tweaks incorporated into roms than oc. I tried running a 1.5 for a week and I honestly didn't even notice a difference other than less battery life.
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icy56 said:
I really don't see the need for oc other than for playing a REALLY graphical intensive game. For me, I get a better performance boost from the tweaks incorporated into roms than oc. I tried running a 1.5 for a week and I honestly didn't even notice a difference other than less battery life.
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Well I notice a difference but anything above 2.0 GHz it is nearly impposible, even if it is gotten above that it would not match new dual and quad Core CPU because they have a different architecture but the battery is the first thing that you notice but the things that I do on the phone require much more processing power than stock. Well the highest is 1.6ish that I think the phone has been able to handle. But definitely overclocking the phone will get you up to speed work new games coming out
tichs said:
Hi Guys I have a Galaxy S 4G I have noticed that max stable overlclock is 1.508Ghz If I bump up to 1.516Ghz It is stable but at watching videos for a long time it crashes, I have noticed that the normal max temp is below 60 C or 55 C, that's stress testing for long time, normal everyday is 41~43 or, I Think It can go higher but I t would need 1500mV or 1600mV core Voltage also to achieve 1.6, 1.7 or 1.8 even 2.0Ghz It takes 1600mV or 1800mV, temps would be 45~47 normal, and above 60~65 on stress testing. But tegrak doesn't support these volatges, It would need to tweak the code. With proper cooling temps can go down to 33 or 30, lets say using the phone in a cool room.
Do you know when are they gonna support higher core voltages(Tegrak OC)?
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When we get source for GB or ics then I can write scripts to tweak the voltages higher for a higher oc, I have been waiting for that lol
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shotchacokov said:
Mine runs stable and quite cool @ 1.62 and I get 4128 quad score, but I have no need to oc the phone with all the tweaks.
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Your phone runs quite cool?? Mine gets warm to the touch around the speaker after playing angry birds for 20mins
Like many parts of the world, here in Australia it can get very hot. I would like to have my Galaxy Note automatically slow down when its too hot. I'm thinking this might mean a CPU governor that checks temp as well as CPU load.
If something like this already exists then does someone know where I can find it?
Otherwise I wonder if its not too hard to modify an existing governor to include temperature based throttling.
Currently I use CPU Master Pro to enable an overheat profile when it hits 49°c but you can get days here where the air is that hot! It needs to keep slowing down if it keeps heating up more. Even CPU Master Pro can't do that.
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Use setcpu profile.
Make a profile in setcpu, set the rule to if over 40 degrees limited cpu from 200 mhz to 1000 mhz. Its very easy
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darkinners said:
Use setcpu profile.
Make a profile in setcpu, set the rule to if over 40 degrees limited cpu from 200 mhz to 1000 mhz. Its very
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I already have that with CPU Master Pro. But i want something more versatile.
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So I've been playing with some kernels and have been deciding between stock and checkm8. One thing that I noticed tho is that you can force all cores at 2.3ghz, but after about 50% load it automatically drops to 2ghz. And at 100% cpu load it drops again at 1.5ghz. is there anyway to stop this so it runs at 2.3 even at 100% load until a certain temp?
I noticed this on both stock and checkm8
What game are you trying to run that would need all cores at 100% so it doesn't lag?
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richii0207 said:
What game are you trying to run that would need all cores at 100% so it doesn't lag?
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Benches and such... Like I just don't want the cpu and gpu to throttle to a lower frequency just because of high load. I only want that to happen because of temps.
So do our snapdragons only go up to 1.6ghz or are the kernel apps reporting wrong? I've tried a couple and they only show 1.6ghz as max speed. The 820 can go up to 2.2ghz.
Kerenel Apps
Hi, I have been using CPUZ and having no issues with it reporting the correct CPU speed as far as kernel apps I am not sure what app your using but it might be worth it to check it with CPUZ its a free download from the play store.
using Kernel Aduitor it reports max at 1.6Ghz
fatapia said:
using Kernel Aduitor it reports max at 1.6Ghz
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using same app i get 1.6ghz as max also. could it be that lg underclocked this version of the 820?
freebee269 said:
using same app i get 1.6ghz as max also. could it be that lg underclocked this version of the 820?
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possibly, although I'm not too sure why they would... heating issues? doubt it but idk enough to edit in new frequencies..
The 820 has 2 cores with max speed of 2.2 and 2 maxed at 1.6
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