Fujitsu FR81S Manuel D’Utilisation
CHAPTER 37: BUS PERFORMANCE COUNTERS
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER
: BUS PERFORMANCE COUNTERS
FUJITSU SEMICONDUCTOR CONFIDENTIAL
20
Analyze the measurement results using a debugger host program, such as Softune Workbench. Visualize the
analysis results by displaying them in a graph so that they can be understood intuitively (pie graph, bar graph,
line graph, etc.), and provide information that is beneficial for user program tuning (bus performance analysis
function). The following is an analysis example.
Analysis example:
1. Bus master access proportion
Ex. Proportion of DMA access vs. CPU access, specific bus master access that occupies the total
access, etc.
2. Occurred event proportion
Ex. Proportion of write access vs. read access, proportion of total cycles made up of wait cycles, etc.
3. Target accessed proportion
Ex. Proportion of MCH vs. ICH, proportion of total accesses made up of accesses to a specific target,
etc.
4. Proportion of specific accesses from a specific bus master to a specific target
Ex. Proportion of total access made up of read accesses from CPU to MCH, etc.
5. Proportion of wait cycles occurring in specific target
Ex. Proportion of total cycles made up of wait cycles during MCH access
6. Analyze operation of each bus between two specific points in a program
Ex. Proportion of total cycles between two specific points in the program consisting of read, write,
wait cycles, etc.
7. Analyze operation of each bus during progress of each specific time
Ex. Time course of proportion of all accesses consisting of accesses to specific bus masters and
specific targets, etc.
MB91520 Series
MN705-00010-1v0-E
1269