This paper addresses the problem of measuring time in object-oriented event-driven real-timesystems. Several possible implementations of the timing subsystem are considered. Some important consequences that an implem...
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(纸本)3540643591
This paper addresses the problem of measuring time in object-oriented event-driven real-timesystems. Several possible implementations of the timing subsystem are considered. Some important consequences that an implementation can have on the overall time overhead are discussed. The paper proposes a modified multiple-rate policy of updating software timers. Timing ticks are distributed through a tree structure in a way that tends to minimize the overall overhead, while retaining a small variation of the overhead in different clock cycles. The paper presents the results of a comparative analysis of the described models. The analysis considers different exploitation conditions, in respect to the number of software timers and their resolutions.
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