cpu_info

A lightweight, cross-platform Rust library that retrieves detailed CPU information with zero unsafe FFI dependencies and without relying on system locale or external commands.

This crate is designed to work reliably on Linux and Windows (more platforms coming soon). It parses standardized kernel interfaces (/sys, /proc) and CPUID instructions when available, delivering:

• CPU vendor (Intel, AMD, ARM implementers, or custom vendor string)

• CPU architecture (x86, x86-64, ARM, ARM64)

• CPU model name (via CPUID on x86 or procfs on ARM)

• Total logical cores

• Total physical cores

• Core grouping and distribution analysis

  • Linear CPUs (all cores identical)
  • Hybrid CPUs (e.g., Intel P-cores + E-cores)
  • Custom configurations (multiple clock groups)

This crate is pure Rust and does not use any C libraries or bindings.

✨ Features

✔ Accurate vendor detection

• On x86/x86-64: via CPUID vendor string
• On ARM: via implementer ID from /proc/cpuinfo

✔ Architecture detection

Based on Rust’s built-in compile-time constants (always correct).

✔ Physical and logical core counting

Uses /sys/devices/system/cpu for reliable detection across all Linux distributions.

✔ Hybrid CPU detection

Detects P-cores and E-cores by analyzing clock frequency groups or core_type when available.

✔ No locale issues

Does not rely on text labels like “model name”, which vary by language.

✔ No external commands

No calls to lscpu, nproc, dmidecode, etc.

🔭 Upcoming features (work in progress)

The crate will soon include runtime CPU feature detection, such as:

• SSE, SSE2, SSE3, SSSE3
• AVX, AVX2
• BMI1, BMI2
• FMA
• POPCNT
• RDTSCP
• AES-NI
• And many other CPUID-based feature bits

This will allow applications and game engines to adapt dynamically to available instruction sets without relying on compile-time feature flags.

(Windows + Linux support planned; macOS may be added later.)

🚀 Example

use cpu_info::CpuInfo;

fn main() {
    let info = CpuInfo::new();
    println!("{:#?}", info);
}