IQ80960RM/RN
Evaluation Board Manual 4-7
i960® RM/RN I/O Processor Overview
Figure 4-5 shows a simplified connection of the Application Accelera tor to the i960 RM/RN I/O
Processor Internal Bus.
4.8 Performance Monitor Unit
The Performance Monitoring features aid in measuring and monitoring various system parameters
that contribute to the overall performance of the process or. The monitoring facility is genericall y
referred to as PMON – Performance Monitoring. The facility is model specific, not architectural;
its intended use is to gather p erformance measurements that can be used to retune/ref ine code for
better system level performance.
The PMON facility provided on the i960 RM/RN I/O processor comprises:
One dedicated global Time Stamp counter, and
Fourteen (14) Programmable Event counters
The global time stamp counter is a dedicated, free running 32-bit counter.
The programmable even t cou n t er s ar e 3 2-b i ts w i de . Ea ch counter can be program m e d to ob se rve
an event from a defined set of events. An event consists of a set of parameters which define a start
condition and a stop condition. The monitored eve nts are selected by programming an event select
register (ESR).
Figure 4-5. Application Accelerator Unit
64-bit
Data Queue
Application Accelerator Uni t
Packing/
Unpacking
Unit
80960
Bus Interface Internal Bus
Boolean Unit