View source for IGEP Devices Power Consumption Measurements

== Introduction ==

IGEP boards have been designed using low power consumption technologies. Like other embedded devices, some system parameters like: CPU speed, CPU load, peripherals enabled/disabled, Kernel configurations and other ones, can vary its power consumption.

This article is the result of some analysis implemented to IGEP boards.

== IGEPv2 boards ==

IGEPv2 boards have been tested using:

{| cellspacing="0" cellpadding="1" border="1" style="text-align: left;"
|-
| bgcolor="#BBBBBB" |'''Hardware:''' 
| bgcolor="#BBBBBB" |'''Firmware:''' 
| bgcolor="#BBBBBB" |'''CPU load software:'''
|-
| IGEPv2 xxxxx <br> 5 Vcc power supply <br> Serial debug cable
| Linux kernel 2.6.37-4 <br> Poky-7.0.0 (rootfs) <br> IGEP X-Loader 2.5.0.2 (IGEP Expansion support disabled in igep.ini) 
| stress-1.0.4
|}

=== Results: ===

{| cellspacing="0" cellpadding="1" border="1" style="text-align: center;"
|-
| style="text-align: center;" bgcolor="#CCFFCC"| '''ISEE PRODUCT'''
| colspan="5" style="text-align: center;" bgcolor="#CCFFCC" | '''IGEP v2'''
|-
| style="text-align: left;" bgcolor="#CCFFCC"|'''MODEL''' 
| style="text-align: left;" bgcolor="#CCFFCC"| '''IGEP0020-RC5''' 
| style="text-align: left;" bgcolor="#CCFFCC"| '''IGEP0020-RC5''' 
| style="text-align: left;" bgcolor="#CCFFCC"| '''IGEP0020-RC6''' 
| style="text-align: left;" bgcolor="#CCFFCC"| '''IGEP0020-RC6''' 
|-
| style="text-align: left;" bgcolor="#CCFFCC"|'''Other''' 
| style="text-align: left;" bgcolor="#CCFFCC"| Flash memory boot
| style="text-align: left;" bgcolor="#CCFFCC"| SD Card boot
| style="text-align: left;" bgcolor="#CCFFCC"| Flash memory boot
| style="text-align: left;" bgcolor="#CCFFCC"| SD Card boot
|-
| style="text-align: left;" bgcolor="#CCFFCC"|'''Details''' 
| style="text-align: left;" bgcolor="#CCFFCC"| DM3730 (Numonix) '''(NO WIFI)'''
| style="text-align: left;" bgcolor="#CCFFCC"| DM3730 (Numonix) '''(NO WIFI)'''
| style="text-align: left;" bgcolor="#CCFFCC"| DM3730 (Micron) '''(WIFI)'''
| style="text-align: left;" bgcolor="#CCFFCC"| DM3730 (Micron) '''(WIFI)'''
|-
| style="text-align: left;" bgcolor="#99CCFF"| CPU speed: 1Ghz (1)
| style="text-align: left;" bgcolor="#99CCFF"| 400 mA (IDLE) <br> <span style="color:red">470 mA (CPU 100%) (3)</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 400 mA<br> <span style="color:red">470 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 510 mA<br> <span style="color:red">580 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 510 mA<br> <span style="color:red">570 mA</span> 
|-
| style="text-align: left;" bgcolor="#99CCFF"| CPU speed: 800Mhz (1)
| style="text-align: left;" bgcolor="#99CCFF"| 380 mA<br> <span style="color:red">430 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 380 mA<br> <span style="color:red">430 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 490 mA<br> <span style="color:red">540 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 490 mA<br> <span style="color:red">530 mA</span> 
|-
| style="text-align: left;" bgcolor="#99CCFF"| CPU speed: 600Mhz (1)
| style="text-align: left;" bgcolor="#99CCFF"| 360 mA<br> <span style="color:red">390 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 360 mA<br> <span style="color:red">390 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 470 mA<br> <span style="color:red">500 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 460 mA<br> <span style="color:red">490 mA</span> 
|-
| style="text-align: left;" bgcolor="#99CCFF"| CPU speed: 300Mhz (1)
| style="text-align: left;" bgcolor="#99CCFF"| 330 mA<br> <span style="color:red">350 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 330 mA<br> <span style="color:red">350 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 440 mA<br> <span style="color:red">450 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 430 mA<br> <span style="color:red">450 mA</span> 
|-
| style="text-align: left;" bgcolor="#99CCFF"| CPU speed: 1Ghz <br>(Suspend system) (2)
| style="text-align: left;" bgcolor="#99CCFF"| 110 mA
| style="text-align: left;" bgcolor="#99CCFF"| 110 mA
| style="text-align: left;" bgcolor="#99CCFF"| 200 mA
| style="text-align: left;" bgcolor="#99CCFF"| 200 mA
|-
| style="text-align: left;" bgcolor="#99CCFF"| CPU speed: 300Mhz <br>(Suspend system) (2)
| style="text-align: left;" bgcolor="#99CCFF"| 100 mA
| style="text-align: left;" bgcolor="#99CCFF"| 100 mA
| style="text-align: left;" bgcolor="#99CCFF"| 190 mA
| style="text-align: left;" bgcolor="#99CCFF"| 190 mA
|-
| colspan="6"|
|-
| style="text-align: left;" bgcolor="#BBBBBB"| Ethernet cable connected
| colspan="2" style="text-align: center;" bgcolor="#FFFFFF"| +60 mA
| colspan="2" style="text-align: center;" bgcolor="#FFFFFF"| +60 mA
|-
| style="text-align: left;" bgcolor="#BBBBBB"| Disable Ethernet <br> (Reset Ethernet: gpio64=0) (4)
| colspan="2" style="text-align: center;" bgcolor="#FFFFFF"| -60 mA (-120mA if Ethernet cable is connected)
| colspan="2" style="text-align: center;" bgcolor="#FFFFFF"| -60 mA (-120mA if Ethernet cable is connected)
|-
| style="text-align: left;" bgcolor="#BBBBBB"| Powered down DVI-D <br> (Reset DVI-D: gpio170=0) (4)
| colspan="2" style="text-align: center;" bgcolor="#FFFFFF"| -70 mA
| colspan="2" style="text-align: center;" bgcolor="#FFFFFF"| -70 mA
|-
| style="text-align: left;" bgcolor="#BBBBBB"| Disable Bluetooth <br> (Reset BT. gpio137=0) (4)
| colspan="2" style="text-align: center;" bgcolor="#EEEEEE"| -
| colspan="2" style="text-align: center;" bgcolor="#FFFFFF"| < -10 mA
|-
| style="text-align: left;" bgcolor="#BBBBBB"| Disable WIFI <br> (Reset WIFI. gpio138=0) (4)
| colspan="2" style="text-align: center;" bgcolor="#EEEEEE"| -
| colspan="2" style="text-align: center;" bgcolor="#FFFFFF"| -80 mA
|-
| style="text-align: left;" bgcolor="#BBBBBB"| Disable DSS, USB and Audio (5)
| colspan="2" style="text-align: center;" bgcolor="#FFFFFF"| -60 mA
| colspan="2" style="text-align: center;" bgcolor="#FFFFFF"| -60 mA
|-
| style="text-align: left;" bgcolor="#BBBBBB"| Led consumtion (6)
| colspan="2" style="text-align: center;" bgcolor="#FFFFFF"| 35 mA (x4 LEDs)
| colspan="2" style="text-align: center;" bgcolor="#FFFFFF"| 35 mA (x4 LEDs)
|}

=== Notes: ===

'''(1):''' Cpu speed has been set using:
<pre>cpufreq-set -f <frequency></pre>

'''(2):''' Suspend system using:
<pre>echo 'mem' > /sys/power/state</pre>

'''(3):''' [https://people.seas.harvard.edu/~apw/stress/ Download], compile and execute stress program:
<pre>./stress --cpu 1 --timeout 5s</pre>

'''(4):''' Use echo command to change gpios values:
<pre> echo 0 > /sys/class/gpio/gpio<number>/value</pre>

'''(5):''' Download Kernel sources and use menuconfig tool to disable the following device drivers:
*USB support
*Graphics support
*Multimedia support
*Sound card support

Save changes and compile this custom kernel.

'''(6):''' Shutdown leds using the following commands:
<pre>echo 0 > /sys/devices/platform/leds-gpio/leds/d240\:green/brightness
echo 0 > /sys/devices/platform/leds-gpio/leds/d240\:red/brightness
echo 0 > /sys/devices/platform/leds-gpio/leds/d440\:green/brightness
echo 0 > /sys/devices/platform/leds-gpio/leds/d440\:red/brightness </pre>

== IGEP COM boards==
IGEP COM boards have been tested using: 

{| cellspacing="0" cellpadding="1" border="1" style="text-align: left;"
|-
| bgcolor="#BBBBBB" |'''Hardware:''' 
| bgcolor="#BBBBBB" |'''Firmware:''' 
| bgcolor="#BBBBBB" |'''CPU load software:'''
|-
| IGEP COM xxxxx <br> IGEP NEW YORK <br> 5Vcc power supply <br> Serial debug cable
| Linux kernel 2.6.37-4 <br> Poky-7.0.0 (rootfs) <br> IGEP X-Loader 2.5.0.2 (IGEP Expansion support disabled in igep.ini) 
| stress-1.0.4
|}

===Results:===
{| cellspacing="0" cellpadding="1" border="1" style="text-align: center;"
|-
| style="text-align: center;" bgcolor="#CCFFCC"| '''ISEE PRODUCT'''
| colspan="2" style="text-align: center;" bgcolor="#CCFFCC" | '''IGEP COM ELECTRON'''
| colspan="3" style="text-align: center;" bgcolor="#CCFFCC" | '''IGEP COM MODULE'''
|-
| style="text-align: left;" bgcolor="#CCFFCC"|'''MODEL''' 
| style="text-align: left;" bgcolor="#CCFFCC"| '''IGEP0030-RE80''' 
| style="text-align: left;" bgcolor="#CCFFCC"| '''IGEP0030-RE80''' 
| style="text-align: left;" bgcolor="#CCFFCC"| '''IGEP0030-RE7''' 
| style="text-align: left;" bgcolor="#CCFFCC"| '''IGEP0030-RE6''' 
| style="text-align: left;" bgcolor="#CCFFCC"| '''IGEP0030-RE6'''
|-
| style="text-align: left;" bgcolor="#CCFFCC"|'''Other''' 
| style="text-align: left;" bgcolor="#CCFFCC"| Flash memory boot
| style="text-align: left;" bgcolor="#CCFFCC"| SD Card boot
| style="text-align: left;" bgcolor="#CCFFCC"| Flash memory boot
| style="text-align: left;" bgcolor="#CCFFCC"| Flash memory boot
| style="text-align: left;" bgcolor="#CCFFCC"| SD Card boot
|-
| style="text-align: left;" bgcolor="#CCFFCC"|'''Details''' 
| style="text-align: left;" bgcolor="#CCFFCC"| AM3703 (Hynix) '''(NO WIFI)'''
| style="text-align: left;" bgcolor="#CCFFCC"| AM3703 (Hynix) '''(NO WIFI)'''
| style="text-align: left;" bgcolor="#CCFFCC"| DM3730 (Micron) '''(NO WIFI)'''
| style="text-align: left;" bgcolor="#CCFFCC"| DM3730 (Numonix) '''(WIFI)'''
| style="text-align: left;" bgcolor="#CCFFCC"| DM3730 (Numonix) '''(WIFI)'''
|-
| style="text-align: left;" bgcolor="#99CCFF"| CPU speed: 1Ghz (1)
| style="text-align: left;" bgcolor="#99CCFF"| 200 mA (IDLE) <br> <span style="color:red">270 mA (CPU 100%) (3)</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 190 mA<br> <span style="color:red">250 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 210 mA<br> <span style="color:red">280 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 370 mA<br> <span style="color:red">440 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 370 mA<br> <span style="color:red">440 mA</span> 
|-
| style="text-align: left;" bgcolor="#99CCFF"| CPU speed: 800Mhz (1)
| style="text-align: left;" bgcolor="#99CCFF"| 180 mA<br> <span style="color:red">230 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 170 mA<br> <span style="color:red">210 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 190 mA<br> <span style="color:red">240 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 350 mA<br> <span style="color:red">400 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 350 mA<br> <span style="color:red">400 mA</span> 
|-
| style="text-align: left;" bgcolor="#99CCFF"| CPU speed: 600Mhz (1)
| style="text-align: left;" bgcolor="#99CCFF"| 160 mA<br> <span style="color:red">180 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 140 mA<br> <span style="color:red">170 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 170 mA<br> <span style="color:red">190 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 330 mA<br> <span style="color:red">360 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 330 mA<br> <span style="color:red">360 mA</span> 
|-
| style="text-align: left;" bgcolor="#99CCFF"| CPU speed: 300Mhz (1)
| style="text-align: left;" bgcolor="#99CCFF"| 130 mA<br> <span style="color:red">140 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 110 mA<br> <span style="color:red">130 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 140 mA<br> <span style="color:red">150 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 300 mA<br> <span style="color:red">310 mA</span> 
| style="text-align: left;" bgcolor="#99CCFF"| 300 mA<br> <span style="color:red">310 mA</span> 
|-
| style="text-align: left;" bgcolor="#99CCFF"| CPU speed: 1Ghz <br>(Suspend system) (2)
| style="text-align: left;" bgcolor="#99CCFF"| 60 mA
| style="text-align: left;" bgcolor="#99CCFF"| 60 mA
| style="text-align: left;" bgcolor="#99CCFF"| 70 mA
| style="text-align: left;" bgcolor="#99CCFF"| 250 mA
| style="text-align: left;" bgcolor="#99CCFF"| 250 mA
|-
| style="text-align: left;" bgcolor="#99CCFF"| CPU speed: 300Mhz <br>(Suspend system) (2)
| style="text-align: left;" bgcolor="#99CCFF"| 50 mA
| style="text-align: left;" bgcolor="#99CCFF"| 50 mA
| style="text-align: left;" bgcolor="#99CCFF"| 60 mA
| style="text-align: left;" bgcolor="#99CCFF"| 240 mA
| style="text-align: left;" bgcolor="#99CCFF"| 240 mA
|-
| colspan="6"|
|-
| style="text-align: left;" bgcolor="#BBBBBB"| Disable Bluetooth <br> (Reset BT. gpio137=0) (4)
| colspan="2" style="text-align: center;" bgcolor="#EEEEEE"| -
| style="text-align: center;" bgcolor="#EEEEEE"| -
| colspan="2" style="text-align: center;" bgcolor="#FFFFFF"| < -10 mA
|-
| style="text-align: left;" bgcolor="#BBBBBB"| Disable WIFI <br> (Reset WIFI. gpio139=0) (4)
| colspan="2" style="text-align: center;" bgcolor="#EEEEEE"| -
| style="text-align: center;" bgcolor="#EEEEEE"| -
| colspan="2" style="text-align: center;" bgcolor="#FFFFFF"| -170 mA
|-
| style="text-align: left;" bgcolor="#BBBBBB"| Disable DSS, USB and Audio (5)
| colspan="2" style="text-align: center;" bgcolor="#FFFFFF"| -20 mA
| colspan="3" style="text-align: center;" bgcolor="#FFFFFF"| -20 mA
|-
| style="text-align: left;" bgcolor="#BBBBBB"| Led consumtion (6)
| colspan="2" style="text-align: center;" bgcolor="#FFFFFF"| 10 mA (x2 LEDs)
| colspan="3" style="text-align: center;" bgcolor="#FFFFFF"| 10 mA (x4 LEDs)
|}

=== Notes: ===

'''(1):''' Cpu speed has been set using:
<pre>cpufreq-set -f <frequency></pre>

'''(2):''' Suspend system using:
<pre>echo 'mem' > /sys/power/state</pre>

'''(3):''' [http://weather.ou.edu/~apw/projects/stress/ Download], compile and execute stress program:
<pre>./stress --cpu 1 --timeout 5s</pre>

'''(4):''' Use echo command to change gpios values:
<pre> echo 0 > /sys/class/gpio/gpio<number>/value</pre>

'''(5):''' Download Kernel sources and use menuconfig tool to disable the following device drivers:
*USB support
*Graphics support
*Multimedia support
*Sound card support

Save changes and compile this custom kernel.

'''(6):''' 
*Shutdown IGEP COM MODULE leds using the following commands:
<pre>echo 0 > /sys/devices/platform/leds-gpio/leds/d210\:green/brightness
echo 0 > /sys/devices/platform/leds-gpio/leds/d210\:red/brightness
echo 0 > /sys/devices/platform/leds-gpio/leds/d440\:green/brightness
echo 0 > /sys/devices/platform/leds-gpio/leds/d440\:red/brightness </pre>
*Shutdown IGEP COM ELECTRON leds using the following commands:
<pre>echo 0 > /sys/devices/platform/leds-gpio/leds/d210\:green/brightness
echo 0 > /sys/devices/platform/leds-gpio/leds/d210\:red/brightness</pre>