Crate cpuid

Rust bindings for libpcuid CPU detection and feature extraction library.

rust-cpuid provides a high-level interface for getting information about the features of the CPU that runs your code. All the essential work is done by the libcpuid C library and exposed through Rust’s FFI mechanism as a simple and convenient API.

Available features

• CPU vendor, brand and codename detection
• information about number of cores (both physical and logical)
• cache size
• clock frequency

Installation

First - download, and build libcpuid as described in the readme. Install it by running make install (you may want to run ldconfig afterwards).

Add to your Cargo.toml:

[dependencies]
cpuid = "*"

Example

extern crate cpuid;

fn main () {
    match cpuid::identify() {
        Ok(info) => {
            println!("Found: {} CPU, model: {}", info.vendor, info.codename);
            println!("The full brand string is: {}", info.brand);
            println!("Hardware AES support: {}", if info.has_feature(cpuid::CpuFeature::AES) { "yes" } else { "no" });
        },
        Err(err) => println!("cpuid error: {}", err),
    };
    match cpuid::clock_frequency() {
        Some(frequency) => println!("CPU speed: {} MHz", frequency),
        None => println!("Couldn't get CPU speed."),
    };
}

Structs

CpuInfo

A struct holding information about CPU features.

Enums

CpuFeature

CPU feature identifiers.

Functions

clock_frequency

Gets the CPU clock frequency in MHz.

error

Returns last libcpuid error string.

identify

Tries to identify the current CPU and its features.

is_present

Checks if the CPUID instruction is present.

version

Returns libcpuid version string.