1 Introduction

POSE (Parallel Object-oriented Simulation Environment) is a tool for parallel discrete event simulation (PDES) based on Charm++. You should have a background in object-oriented programming (preferably C++) and know the basic principles behind discrete event simulation. Familiarity with simple parallel programming in Charm++ is also a plus.

POSE uses the approach of message-driven execution of Charm++, but adds the element of discrete timestamps to control when, in simulated time, a message is executed.

Users may choose synchronization strategies (conservative or several optimistic variants) on a per class basis, depending on the desired behavior of the object. However, POSE is intended to perform best with a special type of adaptive synchronization strategy which changes it's behavior on a per object basis. Thus, other synchronization strategies may not be properly maintained. There are two significant versions of the adaptive strategy, adapt4, a simple, stable version, and adept, the development version.