Alright, I just updated to Windows 8 and noticed my battery has taken a decent hit with my Zenbook UX31A. I went to every power setting and changed some settings to help with the processor management, but my minimum processor speed keeps resetting to 100% for some reason...
Any ideas on how to get it to stick?
Are you using the high performance power plan? Also what cpu and gpu do you have?
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Nope, whichever plan I use the minimum clock cpu speed always resets to 100%. I actually saw another post of this happening when searching through Google, but that guy didn't get much help. It has an Intel 3rd gen core i7 and an HD 4000 gpu
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ive just looked at a phone tester app thing, and found out my A500 is only running at 480mhz, how come? tried couple other apps to check and not moved, it should be an 1ghz?
help lol
Like virtually all modern processors, the CPU in the Acer scales its speed to the current required load; running @ 1GHz full time would generate additional heat (and system wear) as well as reduce the battery life.
My tab tends to spend about 2/3 of its time @ 456MHz and underMHz, and about 11% @ 1GHz, the rest being spent in between (with very few stops in the 760/816/912MHz stages.)
If you have SetCPU (requires Root) you can fire up a reasonably complex game for a couple of minutes and check the Time in State info again.
Now, if this isn't the case, what specific "phone tester" app did you try?
Yeah you would not want your tablet running Max CPU speeds all day.
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i understand about not running full all the time, but its a constant 430.39, it hasnt moved, even using a high end game or anything?
What's a high end game for you?
Because my tabled does go to 1GHz while playing Galaxy on Fire 2.
Get systempanel from the market and test.
If you are rooted, you can use the script i wrote to log clock speed and usage % of both cpu cores while you are doing something. I OC to 1.5 GHz and it is easy to crank both cores to to the max while watching a movie or even just browsing the web.
http://forum.xda-developers.com/showthread.php?t=1144665
I don't know if it is normal for my CPU speed to be so low, I know that it lowers to save battery but it is always so low and I can see the effects it has. Anyone else get something like this. (quadrant standard edition)
yes it's underclocking to use lower battery when not needed ,it's perfectly normal.
don't worry , it'll fire full throttle (1400 MHZ) when you run a game or something demanding.
Use cpuspy with it you can check the times that CPU spends on each frequency.
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Thanks. I was a bit worried because on other devices I tested the processor was always at maximum.
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Did you at least readed it?
It says Minimum 200Mhz and Max 1400Mhz.
Its how note works. From 200Mhz to 1400Mhz. It scales the CPU speed from 200 to 1400Mhz when you need power.
It also can disable one of the two cores (CPU1 always) to save battery.
It also says that on the galaxy s 2 but that did not go below 1200MHz when i tested it so I was not sure.
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ZacDerbyshire said:
It also says that on the galaxy s 2 but that did not go below 1200MHz when i tested it so I was not sure.
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Something was wrong with your GS2.
It says 500MHz because that's the current frequency it used when you took that screenshot. If it had said 1400MHz, then it would mean that it used all the power to take a screenshot, which wouldn't be normal.
The CPU isn't working at 1.4GHz 24/7. If it had done that, your battery would have lasted for 1 hour. It uses as much as it needs to, and if an app doesn't require much power, it won't use much power. Simple.
LordManhattan said:
It says 500MHz because that's the current frequency it used when you took that screenshot. If it had said 1400MHz, then it would mean that it used all the power to take a screenshot, which wouldn't be normal.
The CPU isn't working at 1.4GHz 24/7. If it had done that, your battery would have lasted for 1 hour. It uses as much as it needs to, and if an app doesn't require much power, it won't use much power. Simple.
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use the force choke on him
Heya All. So far Im running a Milestone 1 (Single Core, 600Mhz) - so Im used to my phone being kinda slow.
My question would be if you could simply switch of 1 - 3 cores on the nexus or simply tell the OS to not utilize them.
In my theory the phone should still be fast enough to handle most of the tasks, but saving battery.
Question 1: Do you think that's possible?
Question 2: Do you think that would save battery?
I guess it would save battery, although the last working core would have to do more work.
Any answers / ideas are welcome =)
Android does that by him self.
Also every (4) cores runs on 15-20% eats less power than one core to maxs.
Sent from my LT26i
Yeah, but don't you think that 1 core at 100% is better in terms of efficiency than 4 cores at 25% ?
Titan2189 said:
Yeah, but don't you think that 1 core at 100% is better in terms of efficiency than 4 cores at 25% ?
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No, the opposite is true. It is more efficient to power 4 cores at 25% than one at 100%.
Of course efficiency depends on the SoC used, in this case the S4 is highly efficient.
Titan2189 said:
Yeah, but don't you think that 1 core at 100% is better in terms of efficiency than 4 cores at 25% ?
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Basically CPU can process only one task at time. If you have four CPUs (4 cores) you can process 4 task at the same time.
Titan2189 said:
Heya All. So far Im running a Milestone 1 (Single Core, 600Mhz) - so Im used to my phone being kinda slow.
My question would be if you could simply switch of 1 - 3 cores on the nexus or simply tell the OS to not utilize them.
In my theory the phone should still be fast enough to handle most of the tasks, but saving battery.
Question 1: Do you think that's possible?
Question 2: Do you think that would save battery?
I guess it would save battery, although the last working core would have to do more work.
Any answers / ideas are welcome =)
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1. Yes, technically speaking it's possible - but you won't be able to do it with stock ROM.
2. No. I doubt that. If you use one core and the core gets overheaded due to high load, then it's the opposite of energy saving. Don't bother tinker to much with core scheduling, since such tasks are buried deep in the US kernel. There've been tons of research putting into how to utilize multicore systems effectively, and as a user I would advise against tinkering with such low-level management. My point is, are you sure you can do it better than hundreds (or thousands) engineering hours spending on the kernel?
Epic
This is exactly what I'm gonna do.
I can live with a wee bit of slowness as long as the battery live is long enough.
So I'll undervolt and underclock as much as possibe... 800 mhz are sufficient for me.
And the ability to clock up whenever I need to...
I was planning to underclock too - probably to around 1Ghz.
Underclocking is different from core scheduling. Under locking definitely saves battery , though it comes with performance trade off. However, disabling cores randomly WILL NOT save battery and probably do the opposite.
I guess some people can tinker the kennel to try optimize the scheduling. But that's the job of developers, I'm against users venturing into such areas
Sent from my Galaxy Nexus using Tapatalk 2
You have to be careful though with underclocking...
Although your CPU is slower, it also takes more clock cycles to complete! So don't go throwing it into 200Mhz range lol.
In the overclocking world though, you can OC a LOT higher on one core, but that's about all you get from disabling other CPU's
Does anyone remember Eco Mode on the Optimus G? As far as I know, when it's activated, the APQ8064 (4xKrait 200 + Adreno 320) runs like a MSM8960T (2xKrait 200 + Adreno 320), shutting off two cores. People said that it made a large impact on battery life but performance was more or less unaffected (probably offloads more rendering to the GPU).
I saw in this thread that the OP managed to add Eco Mode to the ATT stock ROM but it says "WIP - doesn't show UP" of which I have no clue what it's supposed to mean.
the changelog says WIP for v1 alpha but for v2 and v3 it doesn't make any mention of it. Has anyone tried out the mod?
Interesting. The battery saver I this phone is useless, this world be great.
Typically unless am added feature it's mentioned as being reduced it should still be there.
I'm going to think that while it's chimed into the system.ui there's no switch to activate it. Possible a needed app.
ECO Mode on the OG did not turn off 2 cores. It just significantly throttled the way the cpu ramped up to higher frequency.
Elisha said:
ECO Mode on the OG did not turn off 2 cores. It just significantly throttled the way the cpu ramped up to higher frequency.
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Really? I heard reports of it either shutting 2 cores or changer governor to conservative or something
I run ECO mode quite often. Governor stays the same. It just spends more time at 594mhz as its intermediary frequency than 1134mhz. It also hits max frequency sparingly.
You can see the difference in cpuspy or even using CPU-Z real time core frequencies. Shows you what each core is running at.
Hi all,
I have cpu z installed and I'm not rooted. It generally uses all 8 cores but when I accidentally opened it I saw that it was only using 4 cores. I decided to restart and it is still using 4 cores. Is this normal because my g5 plus always uses all 8 cores.
Your in low power or battery saver mode... look at the battery symbol.. I can't remember if it kicks in at 5% or 15% battery automatically, then turns off when you connect the charger... It sometimes takes a few minutes for everything to kick back in. I would bet after getting a decent charge it was back to normal?
There is also a issue with Nougat at newer reporting CPU usage incorrectly even in rooted devices... been talked about a lot, something in the stock Moto firmware (or maybe that was a different Moto, I get them confused sometimes).
Ok thanks. Apparently cpu z was wrong.
the cores are reduced to 4 when u are on battery saver.
On thanks. The weird part was I didn't turn the battery saver.
DarthMaul14 said:
On thanks. The weird part was I didn't turn the battery saver.
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It's automatic at a certain battery level by default.
Oh ok. Does the same thing apply for quad cores and hexacores.
DarthMaul14 said:
Oh ok. Does the same thing apply for quad cores and hexacores.
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It will throttle them, although the exact implementation varies somewhat depending on the actual processor. littleBIG architecture tends to be that the BIG cores get shutdown, on more standard architecture like the SD625 they will get throttled to 50-75% of maximum speed, and others may just get a couple random cores disabled, it depends on the CPU and how Qualcomm/MediaTek/whoever engineered it.
Ok thanks!