How to measure power consumption - Revision history

Dag-: Added Dstat command-line to track power usage

2010-06-15T07:03:11Z

Added Dstat command-line to track power usage

SLXViper at 15:50, 1 June 2007

2007-06-01T15:50:08Z

Thinker at 12:58, 8 October 2006

2006-10-08T12:58:09Z

Matt garman at 18:02, 15 August 2006

2006-08-15T18:02:15Z

Thinker: use force_discharge

2006-07-22T00:38:57Z

use force_discharge

Thinker: tp_smapi

2006-05-11T00:30:51Z

tp_smapi

Thinker: wikilink

2005-11-17T10:28:33Z

wikilink

Thinker at 10:27, 17 November 2005

2005-11-17T10:27:24Z

New page

To monitor the laptop's power consumption while it is running, unplug the AC power and run:
# watch -n1 'cat /proc/acpi/battery/BAT0/*'

This requires ACPI to be enabled. Note that running on battery power may activate power-saving mechanisms, so unless you take care to deactivate them this does not reflect power consumption under AC power.

To measure power consumption while the laptop is suspended, use the [[ACPI sleep power drain test script]].

← Older revision		Revision as of 07:03, 15 June 2010
Line 13:		Line 13:

	Note that running on battery power may activate power-saving mechanisms, so unless you take care to deactivate them this does not reflect power consumption under AC power.		Note that running on battery power may activate power-saving mechanisms, so unless you take care to deactivate them this does not reflect power consumption under AC power.
		+
		+	Dstat is another way to track your laptop's power consumption, run the following with AC power unplugged to relate power usage (in Watts) and battery information:
		+
		+	[dag@moria ~]$ dstat --time --power --battery --battery-remain 10
		+	----system---- power batt remai
		+	time \|usage\|bat0\| bat0
		+	15-06 08:53:55\|0.000\| 94\| 4h29
		+	15-06 08:54:05\|15.74\| 94\| 4h30
		+	15-06 08:54:15\|15.56\| 94\| 4h30
		+	15-06 08:54:25\|15.52\| 94\| 4h30
		+	15-06 08:54:35\|15.60\| 93\| 4h29

	==Measurement script==		==Measurement script==

@@ Line 22: / Line 22: @@
 ==Measurement during suspend==
 To measure power consumption while the laptop is suspended, use the [[ACPI sleep power drain test script]].
 ==See also==
 For reducing power consumption, see [[How to reduce power consumption]].

@@ Line 1: / Line 1: @@
 To monitor the laptop's power consumption while it is running, unplug the AC power and run:
 :{{cmdroot|watch -n1 'cat /proc/acpi/battery/BAT0/*'}}
@@ Line 13: / Line 14: @@
 Note that running on battery power may activate power-saving mechanisms, so unless you take care to deactivate them this does not reflect power consumption under AC power.
 To measure power consumption while the laptop is suspended, use the [[ACPI sleep power drain test script]].
-For reducing power consumption, see [[How to reduce power consumption]] and [[Script_for_monitoring_power_consumption]].
+==See also==

← Older revision		Revision as of 18:02, 15 August 2006
Line 15:		Line 15:
	To measure power consumption while the laptop is suspended, use the [[ACPI sleep power drain test script]].		To measure power consumption while the laptop is suspended, use the [[ACPI sleep power drain test script]].

−	For reducing power consumption, see [[How to reduce power consumption]].	+	For reducing power consumption, see [[How to reduce power consumption]] and [[Script_for_monitoring_power_consumption]].

@@ Line 9: / Line 9: @@
 :{{cmdroot|watch -n1 'cat /sys/devices/platform/smapi/BAT0/power_avg'}}
-The former provides the instantaneous power draw, and the latter is (roughly) an average over the last minute.
+The former provides the instantaneous power draw, and the latter is (roughly) an average over the last minute. It's OK to use  [[tp_smapi]]'s <tt>force_discharge</tt> function instead of physically disconnecting AC power.
 Note that running on battery power may activate power-saving mechanisms, so unless you take care to deactivate them this does not reflect power consumption under AC power.

← Older revision		Revision as of 10:28, 17 November 2005
Line 5:		Line 5:

	To measure power consumption while the laptop is suspended, use the [[ACPI sleep power drain test script]].		To measure power consumption while the laptop is suspended, use the [[ACPI sleep power drain test script]].
		+
		+	For reducing power consumption, see [[How to reduce power consumption]].