pmap – Reports the Memory Map of a Process

The pmap command in Linux is used to report the memory map of a process. It is a useful tool for analyzing the memory usage of a process and identifying memory leaks. The memory map shows the virtual memory addresses used by the process and the corresponding physical memory pages.

Overview

The pmap command takes a process ID as an argument and displays the memory map of that process. The output includes the virtual memory addresses, permissions, and the corresponding physical memory pages. The following is the syntax for the pmap command:

pmap [options] [pid]

Here, the pid is the process ID of the process whose memory map you want to view. If no pid is specified, pmap will display the memory map of the current process.

Examples

1. To display the memory map of a process with PID 1234:

$ pmap 1234

2. To display the memory map of the current process:

$ pmap

Use Cases

Some common use cases for the pmap command include:

• Analyzing the memory usage of a process
• Identifying memory leaks in a process
• Debugging memory-related issues in a process

Options

The pmap command has several options that can be used to customize the output. The following table lists the available options:

Troubleshooting Tips

Here are some common issues you may encounter when using the pmap command and how to troubleshoot them:

• Permission denied error: If you get a “permission denied” error when running pmap, make sure you have the necessary permissions to view the memory map of the process. You may need to run pmap as the root user or with sudo.
• No such process error: If you get a “no such process” error when running pmap, make sure the process ID you specified is correct and the process is still running.

Notes

• The pmap command only works on Linux systems.
• The memory map displayed by pmap is not real-time and may not reflect the current state of the process.