Document revision date: 30 March 2001

## OpenVMS Alpha Partitioning and Galaxy Guide

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Chapter 16
16 | Shared Memory Programming Interfaces
16.1 | Using Shared Memory
16.2 | System Services
16.2.1 | Enhanced Services
16.2.2 | New Section Flag SEC$M_READ_ONLY_SHPT
16.3 | Galaxywide Global Sections
Chapter 17
17 | OpenVMS Galaxy Device Drivers
17.1 | Direct-Mapped DMA Window Changes
17.2 | How PCI Direct-Mapped DMA Works Prior to OpenVMS Version 7.2
17.3 | How PCI Direct-Mapped DMA Works in Current Versions of OpenVMS
17.4 | IOC$NODE_DATA Changes to Support Nonzero Direct-Mapped DMA Windows
Appendix A
Appendix A | OpenVMS Galaxy CPU Load Balancer Program
A.1 | CPU Load Balancer Overview
A.1.1 | Required Privileges
A.1.2 | Build and Copy Instructions
A.1.3 | Startup Options
A.1.4 | Starting the Load Balancer from the GCU
A.1.5 | Shutdown Warning
A.2 | Example Program
Appendix B
Appendix B | Common Values for Environment Variables
Index
| Index
Figures
2-1 | OpenVMS Galaxy Architecture Diagram
2-2 | Another Galaxy Architecture Diagram
2-3 | Shared-Nothing Computing Model
2-4 | Shared-Partial Computing Model
2-5 | Shared-Everything Computing Model
5-1 | Attaching Ribbon Cables
5-2 | Connectors
17-1 | PCI-Based DMA
17-2 | OpenVMS DMA
Tables
2-1 | Galaxy System Services for Lock Programming
2-2 | Galaxy System Services for Events Programming
2-3 | Definitions of Bits in DUMPSTYLE
13-1 | Galaxy System Services for CPU Management
B-1 | Common Values for Environment Variables

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