Power savers, How much mAh do you consume in one hour?
 

Its as simple as that,
Please notice that I'm comparing results produced by powersave_bias and I'm using standard settings like 4 bars of brightness and wifi off and 3G.
I'm just testing the kernel power settings.
And my current is 10 mAh per hour on standby.
Can anyone share theirs with 3G on, 4 bars brightness and Wifi off Using the Wifi switcher or any similar app?
Thanks :)

Re: Power savers, How much mAh do you consume in one hour?
 

-_-' powersave bias does nothing for the N900.

Re: Power savers, How much mAh do you consume in one hour?
 

For me, its a significant improvement.
110 with hw acceleration on.. isn't too laggy.. and speed patch and battery patch..
My max freq is 750, Min is 500 and smartreflex is on.
It keeps the frequency to 500 on standby, sometimes on 700,
and 600-700 on useage and only goes to 750 with REALLY needed.
Usually, it goes to 700 alot, with Powersave, It goes to 25-30% of 500, and sometimes 700.
And I dont loose much visual performance or without the need of reducing Brightness.
Most of all, If I'm correct, stand by time should be around 5 days from full charge to 5mAh *when phone turns off* which is quite significant.
I'd be happy if someone tries this for testing results coz I don't get alotta free time these days to test it all out.

# DO NOT EDIT THIS FILE - CREATE A COPY OF IT FOR CUSTOMIZATION
# minimum frequency to use
MINFREQ=500
# maximum frequency to use
MAXFREQ=750
# list of frequency configurations: each "frequency:volt,dsprate"
FREQS="0:30,90 125:30,90 250:33,180 500:38,400 550:40,430 600:42,500 700:45,500 750:47,500 805:50,500 850:52,500 900:60,500 950:60,500 1000:60,500 1100:72,520 1150:72,520"
SMARTREFLEX_VDD1=1
SMARTREFLEX_VDD2=1
GOVERNOR=ondemand
UP_THRESHOLD=85
SAMPLING_RATE=150000
IGNORE_NICE_LOAD=1
POWERSAVE_BIAS=110


^thats my settings for kernel power

Re: Power savers, How much mAh do you consume in one hour?
 

@ a dick...

I too also use the same frequencies and notice a slightly longer battery life but how do i change the powersaave_bias?? Is 110 the optimum range u've tested it in ??

Re: Power savers, How much mAh do you consume in one hour?
 

(Nitpick: "mAh per hour" is a... peculiar unit, just say mA ;-) )

If powersave_bias has any effect at all it would only be when the CPU is being actively used enough to trigger a frequency change. As 10mA is an idle current draw, comparing that to measure powersave_bias effects is useless.

Re: Power savers, How much mAh do you consume in one hour?
 

12 mAh, 2G, BT off, WiFi not connected.
250-600, see sig for voltages. SR1&2 on.

Re: Power savers, How much mAh do you consume in one hour?
 

@adick
i think you find it's the vfs cache pressure that is making the difference i noticed no difference with the powersave bias but changing the vfs made the most improvenments

Re: Power savers, How much mAh do you consume in one hour?
 

Can you test it without VFS settings tweaked? :)

Even on idle, the frequency keeps on changing, with powerbias, in my opinion, the fluctuation should be reduced improving battery life.

110 is optimum in my opinion because, in higher values, i noticed the cpu is not using the maximum frequency most of the times, if not at all.

i tested idle and minor usage, not too significant or everyday usage coz I dont get alotta free time and I jus use the phone for calls.

If someone can test the performance outcomes on idle and on usage and get talk time, usage times, idle times and power consumption per hour or more for each of those, I'd be glad :)

Re: Power savers, How much mAh do you consume in one hour?
 

already did a some weeks ago, after following karam's thread i changed the powerbias setting in my profile noticed no change still draining the same. reset powerbias and changed vfs setting and battery drain was improved a great deal.

i am not using speedpatch because tbh i used it for a couple of months and for no reason at all i removed speedpatch to see what the difference would be with how my device ran once removed i have not installed speedpatch again.

i feel it's like when you take your car into the garage for something minor and non performance enhancing but you drive out and feel the car feels more punchier, responsive (but it's not) that's how i feel about the speedpatch

Re: Power savers, How much mAh do you consume in one hour?
 

How about standard usage?
i'm not just focusing on idle time but the whole effect of powersave bias coz battery life is a major issue for me, if not the only issue.

Re: Power savers, How much mAh do you consume in one hour?
 

What is ur vfs setting buddy?? From where do u change it?

Re: Power savers, How much mAh do you consume in one hour?
 

standard usage? well standard usage for me is all day everyday connected to wifi answering a few calls forwarding major amounts of texts, making notes, playing music, games occasionally.
so my standard usage is different to someone else's standard usage.

Re: Power savers, How much mAh do you consume in one hour?
 

used swappolube at first mate changed vfs cache pressure to 10, but then used karam's battery script as this changes it from 10 when idle to 100 when you are using so your getting best of both worlds. :D

Re: Power savers, How much mAh do you consume in one hour?
 

If reducing frequency "jitter" is your goal, you should concentrate on tuning the sampling_rate and up_threshold parameters, or even using the conservative governor. Note that this doesn't necessarily equate to longer battery life.

That's the entire point of powersave_bias, you sacrifice peak performance in exchange for (hopefully) reduced energy consumption.

You need to define a specific workload that can be executed non-interactively (for accurate testing), and then compare the total (ie, spontaneous measurements are useless) energy expended for performing that load at various configurations.

Re: Power savers, How much mAh do you consume in one hour?
 

With hw acceleration on, peek performance in basically visual for most of us. No body likes lags even if the process is damn slow.
I'm focusing on using needed frequency and not going to up highest for almost no reason at all. At the same time, Not ignoring the highest frequency but using it only if its completely necessary.
Although conservative governor is a good choice too *i just googled it*

In terms of a phone, Its either we're using it or we're not using it.
In my opinion, even powersave governor would be useful because the processes stop the moment we close the app and phone goes back to idle. In idle, lowest possible frequency is used when powersave_bias is used which would be 500 and wont go higher too often an 250 is disabled and after installing alotta apps, it automatically goes to 500 *thats why 250 is removed from ideal kernel settings*, a constant 500mhz wont consume as much power as fluctuating btwn 500 and 600/700.

I'm looking for something that doesn't reduce the frequency to minimum and lags everything but not too high that its unnecessary and uses alot of power. Its hard to explain. I don't want extremes of either. I want it to be controllable so it saves power and doesn't get too slow. Makes Powersave_bias the best choice.


Powersave governor would cause lags. *the last time i tried it without knowing what it is LOL*
I'm about to switch to conservative gorernor to see the results.

A specific worklod for an hour.. perhaps youtube with wifi on for an hour and see the difference in power consumed. thats high end, Music on for an hour for casual. and idle for no usage. and time difference in 1 hour and difference btwn mAh recorded.

Edit: , I've noticed that on conservative, while calling, the max frew is 750 and on ondemand with powersave, its fluctuating btwn 600 and 700..
plus the effects are faster on ondemand and conservative sticks to one frequency for too long. For example, If I'm using the phone and then close all apps, It take around 10 seconds to come back to 500 and does it slowly step by step eg 750, 700, 600, 550 then 500. and same goes for when you use your phone from idle to start a process.

Re: Power savers, How much mAh do you consume in one hour?
 

On my HTC G1 optimal values were:

POWERSAVE_BIAS=200;
SAMPLING_RATE=1000000;
CPU_UP_THRESHOLD=45;

I'm testing them now on the N900.

Re: Power savers, How much mAh do you consume in one hour?
 

how did it turn out?

Re: Power savers, How much mAh do you consume in one hour?
 

Not bad, lasts about 2 days with standard battery and normal usage pattern.