[Q] Lowest power consumption state - Defy Q&A, Help & Troubleshooting

I have read in some forums about the "sweet spot" of cpu frequency (The cpu frequency at which power consumption by the phone is the least possible).
I want to know what's the "sweet spot" of MB526.
Anyone?

300 mHz, because the vsel is lowest at that frequency? Not sure what exactly is meant by sweet spot
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thekguy said:
300 mHz, because the vsel is lowest at that frequency? Not sure what exactly is meant by sweet spot
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Sweet spot is the cpu frequency at which power consumption is the lowest.... Any frequency lower than that will actually increase power consumption...Apparently, for the Galaxy SL, it is 400Mhz....

hotdog125 said:
Sweet spot is the cpu frequency at which power consumption is the lowest.... Any frequency lower than that will actually increase power consumption...Apparently, for the Galaxy SL, it is 400Mhz....
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I think we need experiment for this. I am trying 350 mhz now
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Doesn't power consumed=>vsel logically? So 300mHz
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thekguy said:
Doesn't power consumed=>vsel logically? So 300mHz
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Apparently not. Too low frequencies can make the phone unuseably slow + increase power consumption:cyclops:

I can understand the phone being slower, but why consume more battery at lowest vsel
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thekguy said:
I can understand the phone being slower, but why consume more battery at lowest vsel
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No answer for that. But tests have shown that it's true.

How have you found that out? I have personally had a positive experience with lower vsels
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thekguy said:
How have you found that out? I have personally had a positive experience with lower vsels
Sent from my MB526 using Tapatalk 2
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I think 300Mhz is the sweet spot.

hotdog125 said:
I think 300Mhz is the sweet spot.
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Exactly. As vsel decreases, power consumption decreases and because 300 mHz has lowest vsel, it is the least power consuming state

hotdog125 said:
I think 300Mhz is the sweet spot.
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OK, well...
I also don't understand this relation between low frequency and higher power consumption, but there is no real difference in battery usage between 300 and 600mHz for me at least. Just set Max Freq to 300 or 600 and use ondemand/conservative governor.

Related

-0.25mv / 1500Mhz gives more quadranet vs stock 1400 mhz and stock voltage

-0.25mv / 1500Mhz gives more quadranet vs stock 1400 mhz and stock voltage
how healthy to keep it this way? any risk go up to 1600Mhz?
on last Omega JB rom i went from 4000 to 5130 in quadrant using this OC.
Thanks!
Of course higher clocks gives vigher benchmarks. Uv doesn't affect unless you uv to the point that voltage can't keep cpu stable.
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johku12 said:
Of course higher clocks gives vigher benchmarks. Uv doesn't affect unless you uv to the point that voltage can't keep cpu stable.
Sent from my GT-I9300 using xda app-developers app
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The question: 1500-1600 levels risky to CPU ?
UV lower is good to keep temp lower...
From my experience, undervolting offers no benefits at all. Temperature remains the same and battery seems to be worse when idling.
with no overclocking and with stock 4.1.1 li7 i have 6300 scores in Quadrant..... with overclocking to 1600 mhz i reached 6700... no sense to overclock it
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myname70 said:
with no overclocking and with stock 4.1.1 li7 i have 6300 scores in Quadrant..... with overclocking to 1600 mhz i reached 6700... no sense to overclock it
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Which rom you use ?
+1
Learning time!
-UV provides stability, its not to save battery. Its such a miniscule amount of volatge it wont mess up battery life, but it will help stability of the CPU...
-And when you OC, you need to undertand that it doesnt stay at the max speed on all four cores all the time. It changes to fit the needs of the user.
I think the CPU can reach 2.0GHz easily, i mean my single core Captivate with a Hummingbird 1.0GHz ARM cortex-A8 could reach 1.92GHz and stay stable with -50mV UV.
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I wont oc.. it screwed battery on my galaxy tab...
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Undervolting/overvolting?

Does any ROM for our old GT540 support undervolting/overvolting?
Thanks!
noobovski said:
Does any ROM for our old GT540 support undervolting/overvolting?
Thanks!
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Over and under clocking?
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andyabc said:
Over and under clocking?
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no -volting.
its something different and for saving some battery juice or extra power.
many other (newer) phones/kernels support it.
andreas__ said:
no -volting.
its something different and for saving some battery juice or extra power.
many other (newer) phones/kernels support it.
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Oh lol, its just i never heard of such thing
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if you know how overclockers clock their pc-s , then you should know about volt-mods/overvolting (vdimm,vdroop and etc.)
hani93 said:
if you know how overclockers clock their pc-s , then you should know about volt-mods/overvolting (vdimm,vdroop and etc.)
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Oh yeah.
Sent from my Sony Tablet S using xda premium
i think the only "undervolting" our phone can do is change the stock frecuency from 245 to 122 lower is unstable....up is 806 some people a little more or a little less...thast regarding the cpu frecuency in terms of Voltage i think is more than imposible due to inestability.
here is full overview of overvolting and so. : link
but shortly:
overvolting gives more voltage to hardware (cpu in this case) .
more voltage=more overclock , but also alot more heat.
undervolting decreases voltage of cpu, to save battery juice for longer time, but instability occurs @ same clock.
(need to lower cpu clock for more stability).
and also cpu is cooler.

[Q] CPU Clock speed

So I was trying to mess around with CPU profiles and I noticed that the low end of the CPU is clocked at 1GHz. If I lower it with Rom Toolbox, it just goes right back up after I leave the menu. the profiles won't stick, governors don't make a difference, and I'm a little confused.
Can someone shed some light on this for me?
I thought the lowest speed was 384 MHz? Install CPU Spy and check what it says.
It is 384MHz. The lower frequency change because of project butter that make the cpu run at a higher frequency when you touch the screen.
Sent from my Nexus 4 using xda app-developers app
Dont you need a custom kernal in order to change the clock speeds?
sent via xda premium with nexus 7
No, we can already change it but it won't stick since it has its own frequency management.
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Is this somewhat similar to perflocker in HTC devices? It had to be disabled to change any cpu settings AT ALL with the stock kernel.
hervelo said:
No, we can already change it but it won't stick since it has its own frequency management.
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That is why..
sent via xda premium with nexus 7
ed10000 said:
I thought the lowest speed was 384 MHz? Install CPU Spy and check what it says.
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You're right. I guess it just has its own profile to set at 1GHz when the screen is on, because the CPU Spy showed it in Deep Sleep/384Mhz for the majority of the night.
test1

Cpu

Hey,
Cpu spy and setCPU show that my N4 only uses the minimum freq and highest possible.
Does this happens to all?
Settings can be found on my signature
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Theres a bit usage on the other freq, but nothing compared to min and max
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calanizzle said:
Hey,
Cpu spy and setCPU show that my N4 only uses the minimum freq and highest possible.
Does this happens to all?
Settings can be found on my signature
Sent from my Nexus 4 using xda premium
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Yes, it's because of the Franco kernel. looks good!
Yes that is normal. Min and max are used the most.
danielvc said:
Yes, it's because of the Franco kernel. looks good!
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KyraOfFire said:
Yes that is normal. Min and max are used the most.
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Ok great, thanks! :good:

Undervolting

Anyone who undervolted his g2 ?
How low can we go ?
Sent from my LG-D802 using xda app-developers app
Very good question.
I hope some guys will reply who have already undervolted.
My max cpu frequency is 1190 MHz.
I don't think you need more speed on 4.2.2 (actually i'm on stock rom).
Gonna depend on soc binning for your device
Sent from my VS980 4G using Tapatalk
My soc binning is 4 and I'm able to maintain stable undervolt by 50 mv (2.26 ghz @ 975 mv I think)
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-62.5 here, I'm sure I can do -75 ( done it before) but it get micro lag, so I go to -62.5 works fine, nice and cool.
-100
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Which app?
Trickstermod
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I'd like to hear more about this! At stock settings my phone overheats and throttles badly. Been testing different voltages and at the moment I'm down five -12,5mV steps @ 962,5mV. Better temperatures and better performance due to less throttling.
I wish I had a rooted phone to do that
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Makrilli said:
My soc binning is 4 and I'm able to maintain stable undervolt by 50 mv (2.26 ghz @ 975 mv I think)
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Where can you find the SOC binning value?
Edit: Hey looks like I found it
You can see the binning of your SoC in the last_kmsg located in /proc/last_kmsg.
You can also found it in /sys/devices/system/soc0 and search for pvs_bin and speed_bin or /d/acpuclk.
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