Linux System Performance

Power entry could be found at /proc/acpi and running process and dameon in my system are:

root        15  0.0  0.0      0     0 ?        S    Nov26   0:00 [pm]
root        23  0.0  0.0      0     0 ?        S    Nov26   0:00 [kacpid]
root        24  0.0  0.0      0     0 ?        S    Nov26   0:00 [kacpi_notify]
root        25  0.0  0.0      0     0 ?        S    Nov26   0:00 [kacpi_hotplug]
root      1105  0.0  0.0   2108   596 ?        Ss   Nov26   0:00 acpid -c /etc/acpi/events -s /var/run/acpid.socket


Power manager manages and keeps entry of class of power source used : Battery, UPS, AC, DC

power consumption by each running apps:
adb shell dumpsys cpuinfo
adb shell dumpsys batteryinfo


System performance measurement:

• Sourcery analyzer: C application software  http://www.mentor.com/embedded-software/sourcery-tools/sourcery-analyzer/?cmpid=7770
• Sourcery probe: Tools for debugging and performance measurement http://www.mentor.com/embedded-software/sourcery-tools/sourcery-probe#features
• Utilities: top, htop, iftop.

Power measurement:

• Linaro ARM energy probe: http://www.cnx-software.com/2012/11/29/soc-power-measurement-with-arm-energy-probes-and-linux-eap-tools/ Used in Linux based system
• Less Watts: https://lesswatts.org/projects/ Collection of good tools to measure power at various level in Intel machine.
• powertop
• $sudo add-apt-repository ppa:colin-king/powermanagement 

$sudo apt-get update

$sudo apt-get install powerstat