Perf is a Linux performance monitoring tool used to measure CPU, memory and other hardware and software performance metrics. It provides insight into performance bottlenecks, allowing users to identify and correct issues. Perf is designed to be extensible and customizable, allowing users to create custom metrics and reports. 

Here at Fixwebnode, we shall look into using Perf command.

How to use Perf Command ?

The Perf command is used to measure CPU, memory and other hardware and software performance metrics. It provides insight into performance bottlenecks, allowing users to identify and correct issues. To use Perf command, users must first install the Perf package from their Linux distribution's package manager. 

Once installed, users can access the Perf command by typing “perf” in the terminal. This will display the list of available options and arguments. The most commonly used options are:

• * stat – This option is used to collect performance metrics such as CPU and memory usage
• * record – This option is used to record performance data over a specified period of time
• * report – This option is used to generate a report from the collected performance data

Perf Command Syntax

The syntax for the Perf command is as follows:

$ perf [OPTIONS] [COMMAND]

Where OPTIONS are the options chosen from the list above and COMMAND is the command to be executed.

For example, to record performance data for the "ls" command, the syntax would be:

$ perf record ls

Examples of using Perf Command ?

Let's look at some examples of how to use the Perf command.

1. To collect performance data for the "ls" command, use the following syntax:

$ perf stat ls

2. To collect performance data over a specified period of time, use the following syntax:

$ perf record -e cycles -a -g -- sleep 10

This will collect performance data for 10 seconds.

3. To generate a report from the collected performance data, use the following syntax:

$ perf report

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