Early Stage Schedulability Analysis Clause Samples
Early Stage Schedulability Analysis. The allocation model of EAST-ADL defines on which ECUs, functions will be executed and on which buses, communication between functions will take place. Based on this information, the following two interesting metrics, relevant from a schedulability point of view, can be considered: Schedulability analysis. Schedulability analysis is applied for the special case of linear chains of activations running on a mono-processor system and when chain rates are harmonic. The task model is generated automatically. This generation is transparent to the user. Once the task model is obtained, a response time will be computed for each end-to-end chain (thread) trough Rate Monotonic Analysis [6].
Early Stage Schedulability Analysis. The allocation model of EAST-ADL defines on which ECUs, functions will be executed and on which buses, communication between functions will take place. Based on this information, the following two interesting metrics, relevant from a schedulability point of view, can be considered: Resource Utilization. Resource utilization is a function of (i) the function’s activation rate and (ii) a time budget representing the time an execution/communication will take. Based on utilization of single resources, other related interesting metrics can also be extracted, as load distribution and function/signals extensibility (function of processors/bus slacks). Interference Time: represents the waiting time to access shared resources (CPU/Bus). This delay is caused by concurrent functions/signals that are allocated to the same execution/communication node. Small interference is desirable to minimize end-to-end latency.