Instead, a modeler can direct parallel execution at the DML model specification level. This is a concise DML description of four copies of a network called campus24 whose gateway routers are connected in a ring topology, with "alignment" attributes specifying four-processor parallel execution: Alignments may also be specified for Net attributes, in which case all hosts, routers, and links within the Net get that alignment by default. The distribution includes source code for: New SOS release 1.
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This includes modeling scalability with number of nodes, traffic flows, bandwidth, system heterogeneity, as well as performance scalability with number of processors.
Here is a list of people who were involved in the creation of the first SSFNet release - Net DML schema reference manual.
Below is a DML fragment showing the use of the "alignment" attributes.
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DML is simple and easy to read and write directly by modelers, is used in graphical network design and validation tools, and serves as a machine-independent model exchange format suitable for storage in databases.
As always, esfnet have been many more people who contributed code improvements and bugfixes. OS provides significant performance optimizations by implementing zero-copy message processing and protocol method call chaining.
Management of parallel random number streams, employing a suite of sssfnet random number generators and statistics from the CERN Colt package. DML specifies a hierarchy of attributes, with inline attribute substitution and multiple inheritance.
OS in x-kernel style. Net for modeling network connectivity, creating node and link configurations. Other platforms may support parallelism as well. The idea of SSF.
The values associated with that attribute are resolved globally, so that any two Hosts, Nets etc. Net will systematically instantiate and configure all simulation objects Hosts, Routers, protocols, and network links. Class Host is actually derived from SSF. BGP4 has new functionality, including route flap damping. The distribution includes source code for: How it actually happens depends on the simulator kernel implementation, on the Java platform, and on the operating system.
Nicol designed, implemented and analyzed a number of very efficient techniques for parallel discrete event simulators. SSF is then responsible for transparently mapping this directive onto available machine resources.
DML included in the library raceway.
SSFNet: The Scalable Simulation Framework Network - ExtremeTech
Instead, a modeler can direct parallel execution at the DML model specification level. OS is simpler, and it differs from the x-kernel in many ways.
Animation of SSFNet models. Supports extensibility, inheritance and substitution of attributes.
ProtocolGraph provides methods for establishing proper dependence relations among the installed protocols. It ssfneh contains the class dmlConfig that can read and parse the DML files and produce the corresponding runtime searchable Configuration objects. Send email to webmaster ssfnet. OS for modeling of the host and operating system components, especially protocols and SSF. The principal classes of package SSF.
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Net have been implemented by Jim Cowie, improving the early design used by Ogielski and his students. How to run SSFNet models. New SOS release 1. The latest SSFNet distribution: Contact us to add new SSFNet tools. Since too much design freedom may be counterproductive in designing models within a restricted application domain such as IP internetworksin our approach all models in a given application domain are composed using domain-specific, configurable derived frameworks.