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On-Chip Monitoring of Single- and Multiprocessor Hardware Real-Time Operating Systems
Publication Type:
Conference/Workshop Paper
Venue:
Proceedings of the 8th International Conference on Real-Time Computing Systems and Applications (RTCSA)
Abstract
The paper presents a novel hardware monitoring system that gives
non-intrusive observability into the execution of hardware-accelerated
Real-Time Operating Systems.Monitoring is a necessity for testing, debugging and performance
evaluations of real-time computer systems. Most research into
monitoring of real-time systems have been devoted to minimising the
execution interference imposed by the monitor. One approach to this
has been the use of hardware support to extract software execution
traces by probing the external processor (or system) busses.However, the use of cache memories on various levels, and the
increased integration of system components on-chip (SoCs) in addition
to limited chip-package pins, severely obstructs traditional hardware
monitors from probing processor signals and busses. For real-time
systems built on these premises there is a need to access execution
information residing on-chip, as well as to avoid interference with
the systems execution behaviour.In this paper we present an integrated solution to on-chip
monitoring of system-level events in a real-time system. The monitor,
called Multiprocess Application Monitor (MAMon), probes a
hardware-based Real-Time Kernel using a Probe Unit integrated as an
IP-block. This component detects and collects events regarding
process execution, communication, synchronisation, and I/O interrupt
activities. Collected events are timestamped and transferred to a
separate computer system hosting an event database and a set of
monitoring application tools. We describe the monitor architecture,
the implementation of a prototype, and an evaluation of its use.
Bibtex
@inproceedings{El Shobaki281,
author = {Mohammed El Shobaki},
title = {On-Chip Monitoring of Single- and Multiprocessor Hardware Real-Time Operating Systems},
month = {March},
year = {2002},
booktitle = {Proceedings of the 8th International Conference on Real-Time Computing Systems and Applications (RTCSA)},
url = {http://www.es.mdu.se/publications/281-}
}