eAnalyzer

eAnalyzer collects usage statistics in the background of your Android phone hardware when mobile apps and services are running on your phone, during both screen-off and screen-on periods. Periodically the logged data is uploaded to our server at Purdue University, where the data are aggregated with other users’ data to study usages patterns during screen-off periods. The logged data is anonymized and contributes to scientific research.

What is in for me?

-- Personal phone analytics of background activities: the app reveals how much hardware usage (and consequently energy drain) happens during screen-off periods compared to screen-on periods.

What eAnalyzer logs from your phone:

Basic Information: the unique device ID (anonymized), the name of the industrial design, network operator name, Android version and CPU core number.

CPU utilization: system CPU time and user CPU time of each application measured in clock ticks

CPU frequency: time in state of each CPU frequency

Network utilization: send bytes and receive bytes of each application

Wi-Fi signal strength: the detected signal level in dBm. At least those are the units used by the TI driver

Mobile network signal strength: the GSM Signal Strength. Valid values are (0-31, 99) as defined in TS 27.007 8.5

Mobile network type: Valid values are EDGE, GPRS, HSDPA, UMTS, HSDPA, HSPA, HSPAP, UMTS, CDMA, LTE

The time notifications generated:the time that an app generates a notification along with the app name.

Screen state: screen on or screen off

Screen brightness: the screen backlight brightness between 0 and 255

GPS state: GPS on or GPS off

GPS satellite number: the number of satellites in the current state of the GPS engine

Recent apps: the foreground apps which are launched most recently

How often eAnalyzer logs:

When screen is off:

Log CPU utilization, CPU frequency and Network utilization of all running apps every 5 minutes

Log the others when the values change except Recent apps

When screen is on:

Log CPU utilization of foreground apps at the transaction of two foreground apps

Log CPU frequency every 5 second

Log Network utilization every 1 second

Log Recent apps every 0.5 second

Log the others when the values change

Overhead of logging:

We have done extensive measurement which showed the total energy consumed by eAnalyzer per day assuming 3 hour screen-on time is 6.5 mAH, which is 0.3% of a fully charged battery (2100mAH).

Contact:

[email protected]