Browse Prior Art Database

Reduced Memory System Simulator

IP.com Disclosure Number: IPCOM000122103D
Original Publication Date: 1991-Nov-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Twichell, BC: AUTHOR

Abstract

Disclosed is a program that allows the user to simulate a computer with various sized memories, without having to insert and remove memory cards. Furthermore, the program, hereafter referred to as the Reduced Memory System Simulator, provides a facility to run an application over a range of memory sizes, displaying, for each memory size, performance statistics, such as the response time of the application and the amount of paging that occurred while the application ran. These features make the Reduced Memory System Simulator well-suited for "memory sizing" -- determining how much real memory is needed to run an application with acceptable performance.

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Reduced Memory System Simulator

      Disclosed is a program that allows the user to simulate a
computer with various sized memories, without having to insert and
remove memory cards.  Furthermore, the program, hereafter referred to
as the Reduced Memory System Simulator, provides a facility to run an
application over a range of memory sizes, displaying, for each memory
size, performance statistics, such as the response time of the
application and the amount of paging that occurred while the
application ran.  These features make the Reduced Memory System
Simulator well-suited for "memory sizing" -- determining how much
real memory is needed to run an application with acceptable
performance.

      The Reduced Memory System Simulator has several advantages over
previous memory sizing techniques which relied on inserting and
removing memory cards.  First, the Reduced Memory System Simulator
does not force the user to shut down the computer and insert or
remove memory cards in order to change the memory size.  Instead, the
user only needs to issue a simple command.  Secondly, the Reduced
Memory System Simulator can run as a driver program, which executes a
specified application multiple times over a range of memory sizes,
and displays important statistics that describe the application's
performance at each memory size. This automates the task of memory
sizing.  The figure gives an example of a report that is produced by
the Reduced Memory System Simulator when it...