Products/FAQ : CSIM 19

What was new in CSIM 19?

1. Queue management — new and unique to CSIM 19! You'll be able to manage queues across all resources (facilities, storages, buffers, events and mailboxes); processes (job, transaction, customer) can switch queues as needed so that you can model systems where processes do this. You can
• examine and manipulate processes enqueued at facilities, storages, buffers, events and mailboxes
• examine and manipulate messages enqueued at mailboxes
• model queueing disciplines that involve reordering queues of processes
• model queueing disciplines that involve moving processes between different resources
• have a process structure, used to access and alter process attributes
• have a process-private structure, so that external processes can access and alter attributes internal to a process; this is an unspecified structure, so that the modeler can implement attributes specific to a model
2. Buffers — a new CSIM resource. A buffer is
• similar to a storage except that a buffer is initially empty
• used to model finite capacity buffers in communications devices
3. Enhanced qtables that can be used to tabulate time-based real-valued variables
4. New probability distribution functions
• zipf
• hypoexponential
• pareto
5. Statistics for events and mailboxes. Using CSIM 19, you can
• selectively "monitor" events and mailboxes
• gather statistics on process queues
• gather statistics on message queues for mailboxes
• develop reports for events and mailboxes
6. CSIM 19 also provides
   • reset methods for individual resources
   • prioritized selection of next process which will occur at exactly the same point in simulated time
   • addition of time_wait_any and timed_queue_any methods for event sets,
   • changed operation of storage so that you can now have discrepancies between the number of allocates and deallocates; also changed statistics and report, to allow the discrepancies
   • a new service discipline for facilities: preempt-restart
   • additional methods for mailboxes:
     • synchronous_send, and
     • timed_synchronous_send
   • a changed reset procedure, to reset all resources in addition to all data collection objects