Hardware Reference
In-Depth Information
Table 6.6 Descr iption of system monitor window
Title
Description
CPU0
CPU1
CPU2
CPU3
CPU loads of CPU #0, CPU #1, CPU #2, and CPU #3 are shown in the
percentage. US/NI/SY/ID/WA/INT/OFF mean the following:
US: CPU user time
NI: CPU nice time
SY: CPU system time
ID: CPU idle time
WA: CPU wait time
INT: CPU interrupt time + software interrupt time
OFF: CPU power cutoff time
BTRY
The battery life remaining is shown by the percentage of battery capacity. AC/
BATTERY mean the following:
AC: an AC adapter is in use
BATTERY: a battery is in use
THER
The thermal sampling data measured around the board are shown in degrees
Celsius
POLI
The management policy of the power control manager daemon is shown.
POWERSAVE/PERFORMANCE/OPTIMIZATION/USER/
IMMEDIATE mean the following:
POWERSAVE: power-saving policy
PERFORMANCE: performance pursuing policy
OPTIMIZATION: idle reduction policy
USER: user customized policy
IMMEDIATE: application-speci fi ed power setting
These are identified by the color
FREQ
The sum of frequencies (MHz) of CPU #0, CPU #1, CPU #2, and CPU #3.
The frequency of each CPU is identified by a specific color. The maximum
value is 600 MHz × 4 = 2,400 MHz
WATT
The power consumption is shown by the wattage (mW). The maximum value is
4,500 mW
The purpose of the third application program is to create an application in real-
world computing that processes images. SUSAN [ 14 ] is an image recognition pack-
age adopted in the MiBench [ 15 ] benchmark suite. SUSAN implements the Smallest
Univalue Segment Assimilating Nucleus (SUSAN) Principle that was developed to
perform edge and corner detection and structure preserving noise reduction or
smoothing. SUSAN is employed for real-world computing such as magnetic reso-
nance imaging of the brain, vision-based quality assurance application, and so on.
6.3.3.2
Design and Implementation
The source code of the SUSAN benchmark package is available in the MiBench
benchmark suite, which is a set of commercially representative embedded applica-
tions. The package includes three visual effect algorithms. They find corners, find
edges, and smooth shapes in the images. The three algorithms are independent.
The original SUSAN application performs only one choice of the three visual
 
Search WWH ::




Custom Search