Abstract
Techniques are proposed for computing a global virtual time (GVT), which is the minimum local virtual time of processes in Time Warp. The algorithm computes a conservative estimate of GVT using an approach which is considerably simpler than previous algorithms for computing GVT. This algorithm does not require a global synchronization of processors. An inherent problem is GVT computation relates to handling messages in transit. Several alternatives are proposed for solving the transient message problem. The algorithm is suitable for distributed shared memory machines such as the BBN Butterfly and message passing machines with a variety of interconnection networks. >
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