N900 Hardware Power Consumption - Revision history

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

joerg_rw — Thu, 10 Sep 2020 17:56:41 GMT

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===

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

joerg_rw — Thu, 10 Sep 2020 17:55:31 GMT

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===

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

joerg_rw — Mon, 16 Oct 2017 16:52:11 GMT

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

← Older revision		Revision as of 16:52, 16 October 2017
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	</pre>		</pre>
	(4412 mWh - 4407 mWh ) * 3600 s/h / 180 s = 100mW		(4412 mWh - 4407 mWh ) * 3600 s/h / 180 s = 100mW
		+
		+
		+	most accurate method: get average of NAC over a long period:
		+	<pre>IroN900:~# bq27200.sh 300
		+	LOOPMODE=300 RS=22
		+	mv RSOC CSOC mA NAC CACD CACT TTF TTE TEMP
		+	17:50 4115 96 96 -41 1098 1098 1098 65535 1606 25 NOACT:0 IMIN:0 CI:0 CALIP:0 VDQ:1 EDV1:0 EDVF:0
		+	17:55 4131 96 96 -13 1095 1095 1095 65535 4882 25 NOACT:0 IMIN:0 CI:0 CALIP:0 VDQ:1 EDV1:0 EDVF:0
		+	18:00 4131 96 96 -14 1094 1094 1094 65535 4496 24 NOACT:0 IMIN:0 CI:0 CALIP:0 VDQ:1 EDV1:0 EDVF:0
		+	18:05 4131 96 96 -22 1091 1091 1091 65535 2884 24 NOACT:0 IMIN:0 CI:0 CALIP:0 VDQ:1 EDV1:0 EDVF:0
		+	18:10 4123 95 95 -109 1087 1087 1087 65535 594 25 NOACT:0 IMIN:0 CI:0 CALIP:0 VDQ:1 EDV1:0 EDVF:0
		+	18:15 4118 95 95 -41 1084 1084 1084 65535 1572 25 NOACT:0 IMIN:0 CI:0 CALIP:0 VDQ:1 EDV1:0 EDVF:0
		+	18:20 4118 95 95 -23 1080 1080 1080 65535 1884 25 NOACT:0 IMIN:0 CI:0 CALIP:0 VDQ:1 EDV1:0 EDVF:0
		+	18:25 4110 94 94 -33 1077 1077 1077 65535 1906 24 NOACT:0 IMIN:0 CI:0 CALIP:0 VDQ:1 EDV1:0 EDVF:0
		+	18:30 4118 94 94 -34 1076 1076 1076 65535 1859 24 NOACT:0 IMIN:0 CI:0 CALIP:0 VDQ:1 EDV1:0 EDVF:0
		+	18:35 4107 94 94 -12 1073 1073 1073 65535 5156 24 NOACT:0 IMIN:0 CI:0 CALIP:0 VDQ:1 EDV1:0 EDVF:0
		+	18:40 4113 94 94 -143 1069 1069 1069 65535 447 25 NOACT:0 IMIN:0 CI:0 CALIP:0 VDQ:1 EDV1:0 EDVF:0
		+	</pre>
		+	average delta-NAC per 5 minutes: 3mAh = 36mAh/h
		+
		+	delta-NAC 17:50 4115 96 1098 - 18:20 4118 95 1080 = 18mAh/30min = 36mA
		+
		+	The noise observed in spot reading of "mA" and "TTE" values is from random system activity. It averages out just fine to match the 36mA from long term measure.
		+
		+	Above test been done on a locked/dimmed device on WLAN with working PSM, xchat active

	==Software==		==Software==

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

joerg_rw — Mon, 16 Oct 2017 15:02:15 GMT

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

← Older revision		Revision as of 15:02, 16 October 2017
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	print mean(@pa);		print mean(@pa);
	</pre>		</pre>
		+
		+
		+	chip-based more exact and smarter way:
		+	--[[User:joerg_rw\|joerg_rw]] 15:02, 16 October 2017 (UTC)
		+	<pre>
		+	IroN900:~# bq27k-detail2\|grep -A1 0x23; sleep 60; bq27k-detail2\|grep -A1 0x23
		+	0x23 - 0x22: 3031 SAE Available Energy High - Low Byte 29.2 µV2h (2) R
		+	*29.2 / 20 = 4425 mWh
		+	0x23 - 0x22: 3029 SAE Available Energy High - Low Byte 29.2 µV2h (2) R
		+	*29.2 / 20 = 4422 mWh
		+	</pre>
		+	(4425 mWh - 4422 mWh) / 1/60h = 180mW
		+
		+	<pre>
		+	IroN900:~# bq27k-detail2\|grep -A1 0x23; sleep 180; bq27k-detail2\|grep -A1 0x23
		+	0x23 - 0x22: 3022 SAE Available Energy High - Low Byte 29.2 µV2h (2) R
		+	*29.2 / 20 = 4412 mWh
		+	0x23 - 0x22: 3019 SAE Available Energy High - Low Byte 29.2 µV2h (2) R
		+	*29.2 / 20 = 4407 mWh
		+	</pre>
		+	(4412 mWh - 4407 mWh ) * 3600 s/h / 180 s = 100mW

	==Software==		==Software==

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

joerg_rw — Mon, 16 Oct 2017 14:38:09 GMT

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>

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

joerg_rw — Mon, 16 Oct 2017 14:26:07 GMT

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
Line 110:		Line 110:
	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>

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

joerg_rw — Mon, 16 Oct 2017 14:12:35 GMT

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

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

joerg_rw — Fri, 15 May 2015 03:40:20 GMT

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

← Older revision		Revision as of 03:40, 15 May 2015
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	* Backlight on max +150 mA, +40mA on 4 of 5 steps in simple brightness applet & low ambient (/sys/class/backlight/acx565akm/brightness = 63)		* 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		* Media player playing MP3, one step above mute. 110 mA T
-	* More media player measurements (ssh over wifi, gsm off, same file)
-	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.~~
-	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.~~
-	~~[[User:l29ah\|l29ah]] 22:53, 14 May 2015 (UTC)~~
-	** idle @125MHz: 45mW T
-	** idle @250MHz: 76mW T
-	** mediaplayer mp3 playback, max volume, speakers: 415mW T
-	** mediaplayer mp3 playback, max volume, headphones: 262mW T
-	** openmediaplayer mp3 playback, max volume, headphones: 230mW T
-	** mediabox mp3 playback, max volume, speakers: 463mW T
-	** mediabox mp3 playback, max volume, headphones: 324mW T
-	** oscp mp3 playback, 99% volume, gui on, speakers: 434mW T
-	** oscp mp3 playback, 99% volume, gui on, headphones: 301mW T
-	** oscp mp3 playback, 99% volume, gui off, headphones: 273mW T
-	** oscp mp3 playback, ALSA, PA's mixer setup, 99% softvol, gui off, headphones: 195mW T
	* Vibrator at max +120 mA		* Vibrator at max +120 mA
	* md5sum /dev/zero 250 mA T		* md5sum /dev/zero 250 mA T
Line 54:		Line 37:
	* 3G connected, good signal, no data or other activity +8 mA.		* 3G connected, good signal, no data or other activity +8 mA.
	* 2G connected, good signal, no data or other activity +5 mA		* 2G connected, good signal, no data or other activity +5 mA
-
-	~~===2x bash infinite loops, by frequency===~~
-	* 250MHz 278mW T
-	* 500MHz 524mW T
-	* 805MHz 903mW T
-	* 900MHz 1064mW T
-
-	~~So it seems like the power saving cpufreq hacks are largely irrelevant and one would always use ondemand for maximum CPU peak throughput. Needs further testing with irregular I/O-dependent load tho.~~
-
-	~~'''NOTE: everything >500MHz WILL destroy your CPU long term, due to overheating and EM''' This is as evident as the rule "You shall not operate 12V incandescent Lamp at 15V or 20V"~~
-	~~--[[User:joerg_rw\|joerg_rw]] 12:28, 13 May 2015 (UTC)~~

	===2G data, short pings===		===2G data, short pings===
Line 94:		Line 66:
	3G recieving at 200 k/s 275 mA		3G recieving at 200 k/s 275 mA

-	===random adds:===	+	==random adds:==
		+
		+	===2x bash infinite loops, by frequency===
		+	* 250MHz 278mW T
		+	* 500MHz 524mW T
		+	* 805MHz 903mW T
		+	* 900MHz 1064mW T
		+
		+	So it seems like the power saving cpufreq hacks are largely irrelevant and one would always use ondemand for maximum CPU peak throughput. Needs further testing with irregular I/O-dependent load tho.
		+
		+	'''NOTE: everything >500MHz WILL destroy your CPU long term, due to overheating and EM''' This is as evident as the rule "You shall not operate 12V incandescent Lamp at 15V or 20V"
		+	--[[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 -9, screen blanked, aggressive custom breathing indicator light: 20 mA

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

l29ah — Thu, 14 May 2015 23:40:23 GMT

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>

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

l29ah — Thu, 14 May 2015 23:39:25 GMT

Some preliminary numbers using the battery monitor chip.

← Older revision		Revision as of 23:39, 14 May 2015
Line 32:		Line 32:
	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)