N900 Hardware Power Consumption - Revision history

imported_>joerg_rw: /* 2x bash infinite loops, by frequency */ rypo

2020-09-10T17:56:41Z

2x bash infinite loops, by frequency: rypo

← Older revision		Revision as of 17:56, 10 September 2020
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	</pre>		</pre>

	7mAh / 4min = 7*60mA_min / 4min = ~105mA(h/h); obviously depends a lot on IRC ~~actibity~~ during test period		7mAh / 4min = 7*60mA_min / 4min = ~105mA(h/h); obviously depends a lot on IRC activity during test period

	===A script to monitor the power consumption for a minute using bq27x00_battery===		===A script to monitor the power consumption for a minute using bq27x00_battery===

imported_>joerg_rw: /* 2x bash infinite loops, by frequency */ some more calculations, typo fix

2020-09-10T17:55:31Z

2x bash infinite loops, by frequency: some more calculations, typo fix

← Older revision		Revision as of 17:55, 10 September 2020
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	--[[User:joerg_rw\|joerg_rw]] 12:28, 13 May 2015 (UTC)		--[[User:joerg_rw\|joerg_rw]] 12:28, 13 May 2015 (UTC)

	WLAN PS-mode medium,10 mW, ssh login active, local xterm with bq27200 script loop -9, screen blanked, aggressive custom breathing indicator light: 20 mA		WLAN PS-mode medium,10 mW, ssh login active, local xterm with bq27200 script loop 20, screen blanked, aggressive custom breathing indicator light: 20 mA

	xchat 8 freenode chan, wifi PSM medium, screen locked:		xchat 8 freenode chan, wifi PSM medium, screen locked:
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	18:40 4087 99 99 -64 1180 1180 1180 65535 3403 36 0		18:40 4087 99 99 -64 1180 1180 1180 65535 3403 36 0
	</pre>		</pre>

			7mAh / 4min = 7*60mA_min / 4min = ~105mA(h/h); obviously depends a lot on IRC actibity during test period

	===A script to monitor the power consumption for a minute using bq27x00_battery===		===A script to monitor the power consumption for a minute using bq27x00_battery===

imported_>joerg_rw: /* A script to monitor the power consumption for a minute using bq27x00_battery */ added bq27200.sh example

2017-10-16T16:52:11Z

A script to monitor the power consumption for a minute using bq27x00_battery: added bq27200.sh example

@@ Line 151: / Line 151: @@
 </pre>
 (4412 mWh - 4407 mWh ) * 3600 s/h / 180 s = 100mW
 ==Software==

imported_>joerg_rw: /* A script to monitor the power consumption for a minute using bq27x00_battery */ alternative method

2017-10-16T15:02:15Z

A script to monitor the power consumption for a minute using bq27x00_battery: alternative method

@@ Line 130: / Line 130: @@
 print mean(@pa);
 </pre>
 ==Software==

imported_>joerg_rw: /* A script to monitor the power consumption for a minute using bq27x00_battery */ ++

2017-10-16T14:38:09Z

A script to monitor the power consumption for a minute using bq27x00_battery: ++

← Older revision		Revision as of 14:38, 16 October 2017
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	Go measure it yourself.		Go measure it yourself.
	[[User:l29ah\|l29ah]] 23:40, 14 May 2015 (UTC)		[[User:l29ah\|l29ah]] 23:40, 14 May 2015 (UTC)
	this only would show that the kernel module and/or the perl script are buggy--[[User:joerg_rw\|joerg_rw]] 14:26, 16 October 2017 (UTC)		this only would show that the kernel module and/or the perl script are buggy. Actually the chip is better in doing sum than a script, it has registers for that and works completely transparent without any sw attention--[[User:joerg_rw\|joerg_rw]] 14:26, 16 October 2017 (UTC)
	<pre>apt-get install perl</pre>		<pre>apt-get install perl</pre>
	<pre>		<pre>

imported_>joerg_rw: /* A script to monitor the power consumption for a minute using bq27x00_battery */ buggy approach

2017-10-16T14:26:07Z

A script to monitor the power consumption for a minute using bq27x00_battery: buggy approach

← Older revision		Revision as of 14:26, 16 October 2017
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	Go measure it yourself.		Go measure it yourself.
	[[User:l29ah\|l29ah]] 23:40, 14 May 2015 (UTC)		[[User:l29ah\|l29ah]] 23:40, 14 May 2015 (UTC)
			this only would show that the kernel module and/or the perl script are buggy--[[User:joerg_rw\|joerg_rw]] 14:26, 16 October 2017 (UTC)
	<pre>apt-get install perl</pre>		<pre>apt-get install perl</pre>
	<pre>		<pre>

imported_>joerg_rw: /* Some preliminary numbers using the battery monitor chip. */ states not recommended, used for test purposes only

2017-10-16T14:12:35Z

Some preliminary numbers using the battery monitor chip.: states not recommended, used for test purposes only

← Older revision		Revision as of 14:12, 16 October 2017
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	These numbers are biased, and represent best cases. Some have had outliers which may be normal and unavoidable current spikes removed. This is under the assumption that the minimal power represents the minimum power achievable, and it should long-term be possible to - possibly with software patches - achieve these. +x indicates the measurement is for that element only. A raw measurement has no + (marked "T"), and is a total consumption of whole device, when operated in that state. Unless otherwise mentioned, numbers are for the idle locked case, with screen off, battery voltage "full" = 4.0 to 4.1V.		These numbers are biased, and represent best cases. Some have had outliers which may be normal and unavoidable current spikes removed. This is under the assumption that the minimal power represents the minimum power achievable, and it should long-term be possible to - possibly with software patches - achieve these. +x indicates the measurement is for that element only. A raw measurement has no + (marked "T"), and is a total consumption of whole device, when operated in that state. Unless otherwise mentioned, numbers are for the idle locked case, with screen off, battery voltage "full" = 4.0 to 4.1V.
	Assume		Assume
	* Suspend (echo mem >/sys/power/state), wifi and GSM off. 2 mA T		* Suspend (echo mem >/sys/power/state), wifi and GSM off. 2 mA T *)
	* Suspend, GSM on, connected to 3G (2 bars) 5 mA T		* Suspend, GSM on, connected to 3G (2 bars) 5 mA T *)
	* Suspend, GSM on, connected to 2G. (2 bars) 3.6 mA T		* Suspend, GSM on, connected to 2G. (2 bars) 3.6 mA T *)
			*): states not recommended, used for test purposes only
	* Idle, no SIM, wlan off 7 mA@4.1 V T		* Idle, no SIM, wlan off 7 mA@4.1 V T
	* Wifi on with maximum powersaving. +~2 mA		* Wifi on with maximum powersaving. +~2 mA

imported_>joerg_rw: /* Some preliminary numbers using the battery monitor chip. */ moved to discussion

2015-05-15T03:40:20Z

Some preliminary numbers using the battery monitor chip.: moved to discussion

@@ Line 29: / Line 29: @@
 * Backlight on max +150 mA, +40mA on 4 of 5 steps in simple brightness applet & low ambient (/sys/class/backlight/acx565akm/brightness = 63)
 * Media player playing MP3, one step above mute. 110 mA T
 * Vibrator at max +120 mA
 * md5sum /dev/zero 250 mA T
@@ Line 54: / Line 37: @@
 * 3G connected, good signal, no data or other activity +8 mA.
 * 2G connected, good signal, no data or other activity +5 mA
 ===2G data, short pings===
@@ Line 94: / Line 66: @@
 G recieving at 200 k/s 275 mA
-===random adds:===
+==random adds:==
 WLAN PS-mode medium,10 mW, ssh login active, local xterm with bq27200 script loop -9, screen blanked, aggressive custom breathing indicator light: 20 mA

imported_>l29ah: /* A script to monitor the power consumption for a minute using bq27x00_battery */

2015-05-14T23:40:23Z

A script to monitor the power consumption for a minute using bq27x00_battery

← Older revision		Revision as of 23:40, 14 May 2015
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	'''CITATION NEEDED! Why should a shell script and i2cget be inferior to a perl script and a deprecated kernel module?		'''CITATION NEEDED! Why should a shell script and i2cget be inferior to a perl script and a deprecated kernel module?
	--[[User:joerg_rw\|joerg_rw]] 12:18, 13 May 2015 (UTC) '''		--[[User:joerg_rw\|joerg_rw]] 12:18, 13 May 2015 (UTC) '''
			Go measure it yourself.
			[[User:l29ah\|l29ah]] 23:40, 14 May 2015 (UTC)
	<pre>apt-get install perl</pre>		<pre>apt-get install perl</pre>
	<pre>		<pre>

imported_>l29ah: /* Some preliminary numbers using the battery monitor chip. */

2015-05-14T23:39:25Z

Some preliminary numbers using the battery monitor chip.

← Older revision		Revision as of 23:39, 14 May 2015
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	those values are moot - for the first 2 it's irrelevant which process is idle since the CPU should zeroclock anyway, alas here it's at fixed clock-freq which is NOT recommended. For the rest the only useful audio source to run those tests is a pink noise at 0dB. See `man sox` for how to create such file. Or to set volume to 1 step above zero, see above - so the whole music content becomes irrelevant. For arbitrary music the amplifier will introduce random "noise" up to 2000mW to the figures. The BQ24150 can't average out that noise. Further there's "GUI on" which means "backlight" and that's very random and even depending on ambient light, see 3 bullets above --[[User:joerg_rw\|joerg_rw]] 12:52, 13 May 2015 (UTC)		those values are moot - for the first 2 it's irrelevant which process is idle since the CPU should zeroclock anyway, alas here it's at fixed clock-freq which is NOT recommended. For the rest the only useful audio source to run those tests is a pink noise at 0dB. See `man sox` for how to create such file. Or to set volume to 1 step above zero, see above - so the whole music content becomes irrelevant. For arbitrary music the amplifier will introduce random "noise" up to 2000mW to the figures. The BQ24150 can't average out that noise. Further there's "GUI on" which means "backlight" and that's very random and even depending on ambient light, see 3 bullets above --[[User:joerg_rw\|joerg_rw]] 12:52, 13 May 2015 (UTC)
	Not fixed, it's ondemand w/ bottom freqs allowed as specified.		Not fixed, it's ondemand w/ bottom freqs allowed as specified.
	I restarted the same track every time, so the comparison should be quite adequate, tho a noise would be better, yep.		I restarted the same track every time, so the comparison should be quite adequate, tho a noise would be better, yep. Also, where did you get the information regarding the bq24150 performance? Such spikes (if there are any) would be smoothed by the capacitors on the power lanes and then detected by bq24150, no? I didn't get any numbers on it from the datasheets tho.
	No backlight ofc.		No backlight ofc.
	[[User:l29ah\|l29ah]] 22:53, 14 May 2015 (UTC)		[[User:l29ah\|l29ah]] 22:53, 14 May 2015 (UTC)