Running A Program At A Low Pin; Figure 7-1. Processes Running On A Nonstop System - HP NonStop SQL/MP Programming Manual

Program Execution

Running a Program at a Low PIN

The operating system identifies a process (a running program) by a unique process
identification number (PIN). In displays and printouts, a PIN usually appears after the
number of the processor where the process is running. For example, the operating
system identifies a process in processor 4 with PIN 195 as 4,195.
The operating system supports an architectural limit of 65,535 concurrent processes
per processor. The actual number of concurrent processes depends on the available
system resources (for example, virtual memory) and the values specified during
system generation.
A PIN has these divisions:

A low PIN ranges from 0 through 254.

A high PIN ranges from 256 through 65,535 (or the maximum number).

PIN 255 is reserved.
Figure 7-1 shows various processes running in a processor on an HP NonStop system.

Figure 7-1. Processes Running on a NonStop System

Processor (CPU)
Operating
System
High-PIN Processes: PINs - 256
Low-PIN Processes: PINs 0 – 254
Operating
System
HP NonStop SQL/MP Programming Manual for C—429847-008
NonStop
Subsystems
PIN 255 is reserved.
NonStop
Subsystems
Applications
7-4
Running a Program at a Low PIN
User
Applications
User
VST010.vsd