Understanding Processes And Threads - Cisco CRS-1 - Carrier Routing System Router Getting Started Manual

Understanding Processes and Threads

Displaying Debugging Status
Enter the show debug command to display debugging features enabled for your terminal session. For
example:
RP/0/RP0/CPU0:router# show debug
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aaa all flag is ON
ipv4 io icmp flag is ON
RP/0/RP0/CPU0:router# no debug aaa all
RP/0/RP0/CPU0:router# show debug
####
ipv4 io icmp flag is ON
Enter the show debug condition command to display the conditional debugging status. For example:
RP/0/RP0/CPU0:router# show debug conditions
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interface
Understanding Processes and Threads
To achieve high availability and performance, the Cisco IOS XR software is built on a modular system
of processes. Each process provides specific functionality for the system, and runs in a protected
memory space to ensure problems with one process cannot impact the entire system.
Multiple instances of a process can run on a single node, and multiple threads of execution can run on
each process instance.
Cisco IOS XR software.
Table 9-2 Process and Thread Syntax and Descriptions
Term CLI Syntax
Process Process name
•
executable-name
•
Process instance JID
•
job-ID
•
Thread TID
•
thread-ID
•
Cisco CRS-1 Series Carrier Routing System Getting Started Guide
9-6
debug flags set from tty 'con0_RP1_CPU0'
debug flags set from tty 'con0_RP1_CPU0'
debug conditions set from tty 'con0_RP1_CPU0'
condition is ON for interface 'POS0/2/0/1'
Table 9-2
Description
A "process" is a group of threads that share a protected memory space. Processes
run independently of other processes, and can be individually started, restarted, or
stopped.
In the command-line interface (CLI) syntax, the process name (or
executable-name) identifies all instances of a process on a node.
Usage example: To change the core dumping options for all instances of a process,
specify the executable-name of the process.
Multiple instances of a process can run simultaneously on a node.
In the CLI, the process instance is shown as the job ID.
Usage example: To change the core dumping options for only a single instance of
a process, specify the job-ID of the process instance.
A "thread" is a unit of execution within a process.
Multiple threads can run inside each instance of a process (known as
"multithreading"). Each thread is assigned a thread ID number.
Chapter 9
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provides a summary of terms for processes and threads in the
Troubleshooting the Cisco IOS XR Software
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