OpenVMS Training : OpenVMS INTERNALS FOR NON-SYSTEMS PROGRAMMERS

This course presents an in-depth explanation of OpenVMS internals, from a conceptual (and when possible, practical) view. It is designed to educate system managers and other non-systems programmers in the most frequently used parts of the OpenVMS executive. The course also provides the foundations for effective use of the system dump analyzer (SDA).

OpenVMS Training Prerequisites

Participants are assumed to have a thorough knowledge of OpenVMS system management, and some experience with system parameters.

OpenVMS Training Course duration

This course requires three (3) days, 70 % lecture, and 30 % lab time.

OpenVMS Training Course Objectives

Students completing this course will understand: the effect many SYSGEN parameters have on the layout of the OpenVMS executive areas; the basic flow of the most frequently accessed OpenVMS mechanisms; the naming conventions used in the OpenVMS executive areas; and the use of SDA commands in displaying information on executive area

OpenVMS Training Course outline

Naming conventions used in the VMS executive

System space locations
OpenVMS internal routines
Data structure layouts and offset names

Internals of the process

P0 address space
P1 address space
Process control block
Process header
Hardware process control block
Job information block

Systems components overview

S0 address space
Timer mechanisms
SWAPPER, ERRFMT, OPCOM, JOB_CONTROL
Process creation

System mechanisms

Interrupt priority levels
Interrupt handling
Exception handling
System service dispatching
ASTs (Asynchronous system traps)
Non-paged dynamic memory layout
Mutexes and MWAIT states
Lock manager database

Analyzing system crashes (caused by software)

SDA utility features
Requirements to run SDA
Bugcheck mechanism
Bugcheck parameters
Sample stacks
Sample crash dump analysis

Using the DELTA Debugger

Scheduling

Overview of scheduling states
Scheduling states transitions
MWAIT state
Wait state queues
Computable queues
Loading and saving process hardware contex

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