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@c ******   This comment is here to remind you not to edit the wksheets.t
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@c ******   in any directory but common.
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@c
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@c Figures ...
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@c   RTEMS RAM Workspace Worksheet
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@c   RTEMS Code Space Worksheet
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@c
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@c  COPYRIGHT (c) 1988-2002.
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@c  On-Line Applications Research Corporation (OAR).
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@c  All rights reserved.
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@c
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@c  wksheets.texi,v 1.2 2002/08/02 00:45:38 joel Exp
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@c
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@node Memory Requirements, Memory Requirements Introduction, Processor Dependent Information Table CPU Dependent Information Table, Top
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@chapter Memory Requirements
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@ifinfo
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@menu
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* Memory Requirements Introduction::
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* Memory Requirements Data Space Requirements::
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* Memory Requirements Minimum and Maximum Code Space Requirements::
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* Memory Requirements RTEMS Code Space Worksheet::
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* Memory Requirements RTEMS RAM Workspace Worksheet::
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@end menu
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@end ifinfo
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@node Memory Requirements Introduction, Memory Requirements Data Space Requirements, Memory Requirements, Memory Requirements
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32 
@section Introduction
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34 
Memory is typically a limited resource in real-time
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embedded systems, therefore, RTEMS can be configured  to utilize
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the minimum amount of memory while meeting all of the
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applications requirements.  Worksheets are provided which allow
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the RTEMS application developer to determine the amount of RTEMS
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code and RAM workspace which is required by the particular
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configuration.  Also provided are the minimum code space,
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maximum code space,  and the constant data space required by
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RTEMS.
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45 
@node Memory Requirements Data Space Requirements, Memory Requirements Minimum and Maximum Code Space Requirements, Memory Requirements Introduction, Memory Requirements
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47 
@section Data Space Requirements
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RTEMS requires a small amount of memory for its
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private variables.  This data area must be in RAM and is
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separate from the RTEMS RAM Workspace.  The following
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illustrates the data space required for all configurations of
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RTEMS:
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55 
@itemize @bullet
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@item Data Space: na
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@end itemize
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@node Memory Requirements Minimum and Maximum Code Space Requirements, Memory Requirements RTEMS Code Space Worksheet, Memory Requirements Data Space Requirements, Memory Requirements
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62 
@section Minimum and Maximum Code Space Requirements
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64 
A maximum configuration of RTEMS includes the core
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and all managers, including the multiprocessing manager.
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Conversely, a minimum configuration of RTEMS includes only the
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core and the following managers: initialization, task, interrupt
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and fatal error.  The following illustrates the code space
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required by these configurations of RTEMS:
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@itemize @bullet
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@item Minimum Configuration: na
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@item Maximum Configuration: na
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@end itemize
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77 
@node Memory Requirements RTEMS Code Space Worksheet, Memory Requirements RTEMS RAM Workspace Worksheet, Memory Requirements Minimum and Maximum Code Space Requirements, Memory Requirements
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79 
@section RTEMS Code Space Worksheet
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81 
The RTEMS Code Space Worksheet is a tool provided to
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aid the RTEMS application designer to accurately calculate the
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memory required by the RTEMS run-time environment.  RTEMS allows
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the custom configuration of the executive by optionally
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excluding managers which are not required by a particular
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application.  This worksheet provides the included and excluded
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size of each manager in tabular form allowing for the quick
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calculation of any custom configuration of RTEMS.  The RTEMS
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Code Space Worksheet is below:
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@ifset use-ascii
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@page
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@end ifset
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@ifset use-tex
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@page
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@end ifset
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@page
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@center @b{RTEMS Code Space Worksheet}
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@sp 1
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@ifset use-ascii
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The following is a list of the components of the RTEMS code space.  The first
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number in parentheses is the size when the component is included,
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while the second number indicates its size when not included.  If the second
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number is "NA", then the component must always be included.
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@itemize @bullet
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@item Core (na, NA)
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@item Initialization (na, NA)
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@item Task (na, NA)
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@item Interrupt (na, NA)
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@item Clock (na, NA)
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@item Timer (na, na)
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@item Semaphore (na, na)
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@item Message (na, na)
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@item Event (na, na)
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@item Signal (na, na)
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@item Partition (na, na)
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@item Region (na, na)
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@item Dual Ported Memory (na, na)
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@item I/O (na, na)
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@item Fatal Error (na, NA)
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@item Rate Monotonic (na, na)
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@item Multiprocessing (na, na)
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@end itemize
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@end ifset
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@ifset use-tex
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@tex
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\line{\hskip 0.50in\vbox{\offinterlineskip\halign{
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\vrule\strut#&
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\hbox to 2.25in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 1.00in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 1.00in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 1.25in{\enskip\hfil#\hfil}&
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\vrule#\cr
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\noalign{\hrule}
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&\bf Component && \bf Included && \bf Not Included && \bf Size &\cr\noalign{\hrule}
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&Core && na && NA && &\cr\noalign{\hrule}
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&Initialization && na && NA && &\cr\noalign{\hrule}
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&Task && na && NA && &\cr\noalign{\hrule}
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&Interrupt && na && NA && &\cr\noalign{\hrule}
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&Clock && na && NA && &\cr\noalign{\hrule}
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&Timer && na && na && &\cr\noalign{\hrule}
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&Semaphore && na && na && &\cr\noalign{\hrule}
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&Message && na && na && &\cr\noalign{\hrule}
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&Event && na && na && &\cr\noalign{\hrule}
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&Signal && na && na && &\cr\noalign{\hrule}
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&Partition && na && na && &\cr\noalign{\hrule}
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&Region && na && na && &\cr\noalign{\hrule}
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&Dual Ported Memory && na && na && &\cr\noalign{\hrule}
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&I/O && na && na && &\cr\noalign{\hrule}
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&Fatal Error && na && NA && &\cr\noalign{\hrule}
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&Rate Monotonic && na && na && &\cr\noalign{\hrule}
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&Multiprocessing && na && na && &\cr\noalign{\hrule}
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&\multispan 5 \bf\hfil Total Code Space Requirements\qquad\hfil&&&\cr\noalign{\hrule}
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}}\hfil}
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@end tex
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@end ifset
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@ifset use-html
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@html
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<CENTER>
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  <TABLE COLS=4 WIDTH="80%" BORDER=2>
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<TR><TD ALIGN=center><STRONG>Component</STRONG></TD>
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    <TD ALIGN=center><STRONG>Included</STRONG></TD>
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    <TD ALIGN=center><STRONG>Not Included</STRONG></TD>
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    <TD ALIGN=center><STRONG>Size</STRONG></TD></TR>
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<TR><TD ALIGN=center>Core</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>NA</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center>Initialization</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>NA</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center>Task</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>NA</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center>Interrupt</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>NA</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center>Clock</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>NA</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center>Timer</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>na</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center>Semaphore</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>na</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center>Message</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>na</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center>Event</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>na</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center>Signal</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>na</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center>Partition</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>na</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center>Region</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>na</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center>Dual Ported Memory</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>na</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center>I/O</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>na</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center>Fatal Error</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>NA</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center>Rate Monotonic</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>na</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center>Multiprocessing</TD>
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    <TD ALIGN=center>na</TD>
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    <TD ALIGN=center>na</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=center COLSPAN=3>
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      <STRONG>Total Code Space Requirements</STRONG></TD>
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     <TD><BR></TD></TR>
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  </TABLE>
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</CENTER>
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@end html
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@end ifset
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@page
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@c ******   Next node is set by a sed script in the document Makefile.
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@c ******   This comment is here to remind you not to edit the wksheets.t
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@c ******   in any directory but common.
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@node Memory Requirements RTEMS RAM Workspace Worksheet, Timing Specification, Memory Requirements RTEMS Code Space Worksheet, Memory Requirements
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260 
@section RTEMS RAM Workspace Worksheet
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262 
The RTEMS RAM Workspace Worksheet is a tool provided
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to aid the RTEMS application designer to accurately calculate
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the minimum memory block to be reserved for RTEMS use.  This
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worksheet provides equations for calculating the amount of
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memory required based upon the number of objects configured,
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whether for single or multiple processor versions of the
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executive.  This information is presented in tabular form, along
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with the fixed system requirements, allowing for quick
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calculation of any application defined configuration of RTEMS.
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The RTEMS RAM Workspace Worksheet is provided below:
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@ifset use-ascii
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@page
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@end ifset
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@ifset use-tex
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@sp 2
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@end ifset
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@center @b{RTEMS RAM Workspace Worksheet}
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@sp 2
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@ifset use-ascii
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The total RTEMS RAM Workspace required is the sum of the following:
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@itemize @bullet
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@item maximum_tasks * na
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@item maximum_timers * na
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@item maximum_semaphores * na
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@item maximum_message_queues * na
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@item maximum_regions * na
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@item maximum_partitions * na
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@item maximum_ports * na
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@item maximum_periods * na
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@item maximum_extensions * na
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@item Floating Point Tasks * na
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@item Task Stacks
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@item maximum_nodes * na
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@item maximum_global_objects * na
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@item maximum_proxies * na
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@item Fixed System Requirements of na
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@end itemize
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@end ifset
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@ifset use-tex
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@tex
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\line{\hskip 0.75in\vbox{\offinterlineskip\halign{
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\vrule\strut#&
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\hbox to 3.0in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 0.75in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 1.25in{\enskip\hfil#\hfil}&
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\vrule#\cr
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\noalign{\hrule}
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& \bf Description && \bf Equation && \bf Bytes Required &\cr\noalign{\hrule}
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& maximum\_tasks &&  * na = &&&\cr\noalign{\hrule}
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& maximum\_timers &&  * na = &&&\cr\noalign{\hrule}
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& maximum\_semaphores &&  * na = &&&\cr\noalign{\hrule}
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& maximum\_message\_queues &&  * na = &&&\cr\noalign{\hrule}
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& maximum\_regions &&  * na = &&&\cr\noalign{\hrule}
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& maximum\_partitions &&  * na = &&&\cr\noalign{\hrule}
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& maximum\_ports &&  * na = &&&\cr\noalign{\hrule}
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& maximum\_periods &&  * na = &&&\cr\noalign{\hrule}
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& maximum\_extensions &&  * na = &&&\cr\noalign{\hrule}
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& Floating Point Tasks &&  * na = &&&\cr\noalign{\hrule}
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& Task Stacks &&\hskip 2.3em=&&&\cr\noalign{\hrule}
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& Total Single Processor Requirements &&&&&\cr\noalign{\hrule}
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}}\hfil}
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\line{\hskip 0.75in\vbox{\offinterlineskip\halign{
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\vrule\strut#&
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\hbox to 3.0in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 0.75in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 1.25in{\enskip\hfil#\hfil}&
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\vrule#\cr
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\noalign{\hrule}
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& \bf Description && \bf Equation && \bf Bytes Required &\cr\noalign{\hrule}
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& maximum\_nodes &&  * na = &&&\cr\noalign{\hrule}
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& maximum\_global\_objects &&  * na = &&&\cr\noalign{\hrule}
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& maximum\_proxies &&  * na = &&&\cr\noalign{\hrule}
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}}\hfil}
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\line{\hskip 0.75in\vbox{\offinterlineskip\halign{
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\vrule\strut#&
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\hbox to 3.0in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 0.75in{\enskip\hfil#\hfil}&
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\vrule#&
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\hbox to 1.25in{\enskip\hfil#\hfil}&
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\vrule#\cr
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\noalign{\hrule}
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& Total Multiprocessing Requirements &&&&&\cr\noalign{\hrule}
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& Fixed System Requirements && na &&&\cr\noalign{\hrule}
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& Total Single Processor Requirements &&&&&\cr\noalign{\hrule}
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& Total Multiprocessing Requirements &&&&&\cr\noalign{\hrule}
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& Minimum Bytes for RTEMS Workspace &&&&&\cr\noalign{\hrule}
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}}\hfil}
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@end tex
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@end ifset
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@ifset use-html
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@html
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<CENTER>
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  <TABLE COLS=3 WIDTH="80%" BORDER=2>
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<TR><TD ALIGN=center><STRONG>Description</STRONG></TD>
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    <TD ALIGN=center><STRONG>Equation</STRONG></TD>
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    <TD ALIGN=center><STRONG>Bytes Required</STRONG></TD></TR>
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<TR><TD ALIGN=left>maximum_tasks</TD>
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    <TD ALIGN=right>* na =</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=left>maximum_timers</TD>
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    <TD ALIGN=right>* na =</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=left>maximum_semaphores</TD>
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    <TD ALIGN=right>* na =</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=left>maximum_message_queues</TD>
381 
    <TD ALIGN=right>* na =</TD>
382 
     <TD><BR></TD></TR>
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<TR><TD ALIGN=left>maximum_regions</TD>
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    <TD ALIGN=right>* na =</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=left>maximum_partitions</TD>
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    <TD ALIGN=right>* na =</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=left>maximum_ports</TD>
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    <TD ALIGN=right>* na =</TD>
391 
     <TD><BR></TD></TR>
392 
<TR><TD ALIGN=left>maximum_periods</TD>
393 
    <TD ALIGN=right>* na =</TD>
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     <TD><BR></TD></TR>
395 
<TR><TD ALIGN=left>maximum_extensions</TD>
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    <TD ALIGN=right>* na =</TD>
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     <TD><BR></TD></TR>
398 
<TR><TD ALIGN=left>Floating Point Tasks</TD>
399 
    <TD ALIGN=right>* na =</TD>
400 
     <TD><BR></TD></TR>
401 
<TR><TD ALIGN=left COLSPAN=2>Task Stacks</TD>
402 
     <TD><BR></TD></TR>
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<TR><TD ALIGN=left COLSPAN=2>
404 
      <STRONG>Total Single Processor Requirements</STRONG></TD>
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     <TD><BR></TD></TR>
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<TR></TR>
407 
<TR><TD ALIGN=center><STRONG>Description</STRONG></TD>
408 
    <TD ALIGN=center><STRONG>Equation</STRONG></TD>
409 
    <TD ALIGN=center><STRONG>Bytes Required</STRONG></TD></TR>
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<TR><TD ALIGN=left>maximum_nodes</TD>
411 
    <TD ALIGN=right>* na =</TD>
412 
     <TD><BR></TD></TR>
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<TR><TD ALIGN=left>maximum_global_objects</TD>
414 
    <TD ALIGN=right>* na =</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=left>maximum_proxies</TD>
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    <TD ALIGN=right>* na =</TD>
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     <TD><BR></TD></TR>
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<TR><TD ALIGN=left COLSPAN=2>
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      <STRONG>Total Multiprocessing Requirements</STRONG></TD>
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     <TD><BR></TD></TR>
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<TR></TR>
423 
<TR><TD ALIGN=left COLSPAN=2>Fixed System Requirements</TD>
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    <TD ALIGN=center>na</TD></TR>
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<TR><TD ALIGN=left COLSPAN=2>Total Single Processor Requirements</TD>
426 
     <TD><BR></TD></TR>
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<TR><TD ALIGN=left COLSPAN=2>Total Multiprocessing Requirements</TD>
428 
     <TD><BR></TD></TR>
429 
<TR><TD ALIGN=left COLSPAN=2>
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      <STRONG>Minimum Bytes for RTEMS Workspace</STRONG></TD>
431 
     <TD><BR></TD></TR>
432 
  </TABLE>
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</CENTER>
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@end html
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@end ifset
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