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REACTtoc.txt
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1996-11-11
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----------------------------
REACT Real-Time Programmer's Guide
Document Number 007-2499-002
Table Of Contents
This guide contains the following chapters/sections.
ALL FILES INCLUDED HERE ARE COMPRESSED PostScript FILES
-------------------------------------------------------------
* Title Page (2 pages)
* Table of Contents (12 pages)
* List of Examples (2 pages)
* List of Figures (2 pages)
* List of Tables (2 pages)
* About This Guide, (4 pages)
1. Chapter 1 "Real-Time Programs," (8 pages)
describes the important classes of real-time programs, emphasizing
the different kinds of performance requirements they have.
2. Chapter 2, "Basic Features of the CHALLENGE and IRIX Architectures,"
(12 pages)
contains an overview of how IRIX manages the resources of a
Challenge or Onyx system for the benefit of normal, interactive
UNIX applications; and points out how these methods often conflict
with the needs of real-time programs. This chapter also touches on
the operation of a multiprocessor array such as the POWERChallenge
Array.
3. Chapter 3, "How IRIX and REACT/Pro Support Real-Time Programs," (22
pages)
gives an overview of the real-time features of IRIX. From these
survey topics you can jump to the detailed topics that interest
you most.
4. Chapter 4, "Managing Virtual Memory in a Real-Time Program," (12 pages)
covers the management of your virtual address space: locking it to
real memory; mapping devices and files into it; and sharing
segments of it between processes.
5. Chapter 5, "Managing Time and Time Intervals," (12 pages)
covers the use of timers and clocks in the Challenge/Onyx
architecture.
6. Chapter 6, "Controlling CPU Workload," (28 pages)
describes how you can isolate a CPU and dedicate almost all of its
cycles to your program's use.
7. Chapter 7, "Using the Frame Scheduler," (38 pages)
describes the REACT/Pro Frame Scheduler, which gives you a simple,
direct way to structure your real-time program as a group of
cooperating processes, efficiently scheduled on one or more
isolated CPUs.
8. Chapter 8, "Optimizing Disk I/O for a Real-Time Program," (24 pages)
describes how to set up disk I/O to meet real-time constraints,
including the use of asynchronous I/O and guaranteed-rate I/O.
9. Chapter 9, "Managing Device Interactions," (18 pages)
summarizes the software interfaces to external hardware, including
and user-level programming of external interrupts and VME and SCSI
devices.
* Appendix A, "Sample Programs," (58 pages)
The programs in this appendix illustrate the use of some of the
features discussed in the book. The following programs are
included:
+ Mapping and Reading the Cycle Counter
illustrates the use of the cycle-counter.
+ Getting the Time of Day Stamp
illustrates the use of gettimeofday() and shows how to test
its precision.
+ Interprocess Communication
illustrates some uses of arenas, semaphores, and interval
timers.
+ Probing the Address Space
displays the addresses assigned to a process address space,
and illustrates some uses of mmap().
+ Deadline Scheduling Subroutines
illustrates the use of schedctl(2) to set a deadline
scheduling policy.
+ Asynchronous I/O Example
illustrates the use of asynchronous I/O including four
different methods of testing for I/O completion, and also
shows process creation with sproc() and the use of semaphores
and barriers.
+ Guaranteed-Rate Request
demonstrates how to request a guaranteed rate of I/O
transfer.
+ Frame Scheduler Examples
describes the sample programs distributed with the REACT/Pro
Frame Scheduler.
* Glossary, (8 pages)
* Index, (12 pages)
* Tech Pubs Wants To Hear From You, ( pages)
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Copyright ⌐ 1996, Silicon Graphics, Inc.