function::cpuid - Linux

Overview

cpuid is a Linux utility that displays detailed information about the host’s CPU. It provides low-level details about the processor, its features, capabilities, and performance. It is widely used in system profiling, hardware analysis, and for debugging purposes.

Syntax

cpuid [options]

Options/Flags

-x or -ex: Print extended information, including vendor-specific registers.
-f or -full: Print all available information, including cache details and performance counters.
-o: Output in JSON format.
-l: Print only a summary of CPU features.
-h or –help: Display help message and exit.

Examples

Simple Usage:

cpuid

Extended Information:

cpuid -ex

JSON Output:

cpuid -o

Summary of Features:

cpuid -l

Common Issues

Permission Denied: sudo privileges may be needed to run cpuid with extended options.
No Output: Check if /proc/cpuinfo is accessible. If not, try running the command with sudo.

Integration

With grep:

cpuid -l | grep AVX

With less:

cpuid -f | less