Products/FAQ : 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

• Develop models using the standard programming languages C or C++, thus saving both time and money by not having to learn a new language.
• Create applications that are virtually limitless. CSIM's flexible C or C++ environments provide you with the freedom to devise simple to complex situations for analysis.
• Build models that are compact and efficient. Because of the nature of compiled C and C++ programs and CSIM's dynamic memory allocation and specialized algorithms, you will enjoy good performance and see limited memory use.
• Take advantage of cross platform compatibility. Develop models on a PC and then deliver them for use on the systems required by your customers.

• Computer systems and networks of computer systems
• Software systems, including applications executing on multiprocessor systems
• Communications systems
• Transportation systems
• Satellite control systems

• Most UNIX workstations with both vendor-supplied and GNU compilers
• IBM-compatible PC's with Windows 98/NT/2000/XP (MS Visual C/C++ and Borland compilers), as well as the Linux operating system. The low cost modular design of CSIM allows programmers to acquire only the languages and platforms that are needed without investing excessive capital.

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