External Adjustment of Runtime Parameters in Time Warp Synchronized Parallel Simulators

Several optimizations to the Time Warp synchronization protocol for parallel discrete event simulation have been proposed and studied. Many of these optimizations have included some form of dynamic adjustment(or control) of the operating parametersof the simulation (e.g., checkpoint interval, cancellation strategy). Traditionally dynamic parameter adjustment has been performed at the simulation object level; each simulation object collects measures of its operating behaviors (e.g., rollback frequency, rollback length, etc) and uses them to adjust its operating parameters. The performance data collection functions and parameter adjustment are overhead costs that are incurred in the expectation of higher throughput. This paper presents a method of eliminating some of these overheadsthrough the use of an external object to adjust the control parameters. That is, instead of inserting code for adjusting simulation parametersin the simulation object, an externalcontrol object is defined to...

• Type: Conference
• Year: 1997
• Where: IPPS
• Authors: Radharamanan Radhakrishnan, Lantz Moore, Philip A. Wilsey
• Keywords: Distributed And Parallel Computing, IPPS 1997, Simulation, Simulation Object, Simulation Object Collects