Linux Tablet Pc Learning From MobileMark

 

While MobileMark is not available for Linux, it illustrates some of the best industry practices for real use power analysis that Linux measurements should also employ.

Multiple Workloads

Mobile systems are subject to different user 1 and usage models, 2 each with its own battery life ,no matter Dell Vostro 1510 Battery or Dell Inspiron 6000 Battery  considerations. To independently measure different usage models, MobileMark 2005 provides  4 workloads:

Office productivity 2002SE

This workload is the second edition of Mobile- Mark 2002 Office productivity. Various office productivity tools are used to open and modify office documents. Think time is injected between various operations to reflect that real users need to look at the screen and react before issuing additional input. The response time of selected operations is recorded (not including delays) to be able to qualify the battery life results and differentiate the performance level available while attaining

that battery(Dell Vostro 1310 Battery) life.

2.Reader 2002SE

This workload is a second edition of Mobile- Mark 2002 Reader. Here, a web browser reads a book from local files, opening a new page every 2 minutes. This workload is almost completely idle time, and can be considered an upper bound, which no "realistic" activity can possibly exceed.

3.DVD Playback

InterVideo R WinDVD R plays a reference DVD movie repeatedly until the battery, Dell XPS M1330 Battery dies. WinDVD monitors that the standard frame rate, so that the harness can abort the test if the work level is not sustained. In practice, modern machines have ample capacity to play DVDs, and frames are rarely dropped.

4. Wireless browsing 2005

Here the system under test loads a web page every 15 seconds until the battery dies. The web pages are an average of 150 KB. This workload is not specific to wireless networks, however, and in theory could be run over wired connections.

Condition the Battery

In line with manufacturer's recommendations, BAPCo documentation recommends conditioning the battery before measurement. This entails simply running the battery from full charge until full discharge at least once. For popular laptop batteries today, conditioning tends to minimize memory effects, extend the battery life, and increase the consistency of measurements. MobileMark recommends conditioning the battery (Dell Latitude E6400 Battery) before taking measurements.

Run the Battery until fully Discharged

Although conditioning tends to improve the accuracy of the internal battery capacity instrumentation, this information is not universally accurate or reliable before or after conditioning. MobileMark does not trust the battery instrumentation, and disables the battery lowcapacity warnings. It measures battery life by running on battery power until the battery is fully discharged and the system crashes.

Qualify Battery Life with Performance

In addition to the battery life (in minutes) MobileMark Office productivity results always report response time. This makes it easy to tell the difference between a battery ,Dell XPS M1530 Battery life result for a low performance system and a similar result for a high performance system that employs superior power management. There is no performance component reported for the other workloads, however, as the user experience for those workloads is relatively insensitive to performance.