Analysis and Improvement of Task Schedulability in Hardwareesoftware Codesign Analysis and Improvement O F T Ask Schedulability in Hardwareesoftware Codesign

Many real-time systems have timing requirements that are diicult to fulll if the system is implemented b y software running on a microprocessor. One way to remedy this problem is to implement the most time-critical parts in application-speciic integrated circuits instead. Hardwareesoftware codesign aims at providing support for the designer of such a heterogeneously implemented system, and especially at nding ways to determine what parts should be implemented in what technology. In this report, we discuss an approach to codesign which has the objective of implementing a real-time system so that it meets its deadlines. The main result presented is a schedulability evaluation method, and we describe how it can be used to guide the partitioning of the system behaviour onto the diierent components of a system hardware architecture. Abstract. Many real-time systems have timing requirements that are diicult to fulll if the system is implemented by software running on a microprocessor. One way to remedy this problem is to implement the most time-critical parts in application-specic integrated circuits instead. Hardwareesoftware codesign aims at providing support for the designer of such a heterogeneously implemented system, and especially at nding ways to determine what parts should be implemented in what technology. In this report, we discuss an approach to codesign which has the objective of implementing a real-time system so that it meets its deadlines. The main result presented is a schedulability e v aluation method, and we describe how it can be used to guide the partitioning of the system behaviour onto the diierent components of a system hardware architecture.