You are required to read and agree to the below before accessing a full-text version of an article in the IDE article repository.

The full-text document you are about to access is subject to national and international copyright laws. In most cases (but not necessarily all) the consequence is that personal use is allowed given that the copyright owner is duly acknowledged and respected. All other use (typically) require an explicit permission (often in writing) by the copyright owner.

For the reports in this repository we specifically note that

  • the use of articles under IEEE copyright is governed by the IEEE copyright policy (available at
  • the use of articles under ACM copyright is governed by the ACM copyright policy (available at
  • technical reports and other articles issued by M‰lardalen University is free for personal use. For other use, the explicit consent of the authors is required
  • in other cases, please contact the copyright owner for detailed information

By accepting I agree to acknowledge and respect the rights of the copyright owner of the document I am about to access.

If you are in doubt, feel free to contact

On-Chip Monitoring of Single- and Multiprocessor Hardware Real-Time Operating Systems


Publication Type:

Conference/Workshop Paper


Proceedings of the 8th International Conference on Real-Time Computing Systems and Applications (RTCSA)


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.


@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 = {}