my-cpu

A utility to detect the current CPU and select a matching binary to run from the result.

Overview

my-cpu is a tool that helps you run CPU-specific binaries by detecting the host CPU architecture and matching it against provided patterns. This is useful for running optimized binaries based on the CPU capabilities of the host system.

Features

• Automatic CPU detection using LLVM
• Regular expression based matching for CPU selection
• Fallback binary support
• Command passthrough to selected binary

Installation

From Source

cargo build --release

Using Docker

docker build -t my-cpu .

Usage

my-cpu --fallback /path/to/fallback/binary -t /path/to/binary:regex [command args...]

Arguments

• --fallback <PATH>: Path to the fallback binary to be used if the CPU cannot be detected or there are no matches
• -t, --target <PATH:REGEX>: One or more target pairs specified as path to binary and a regex pattern to match against the CPU name
• [command...]: The command arguments to pass to the selected binary

Example

my-cpu --fallback /usr/bin/app-generic \
       -t /usr/bin/app-x64-v4:x86-64-v4 \
       -t /usr/bin/app-avx512:".*avx512.*" \
       -- --some-arg value

This will:

1. Detect the current CPU
2. Try to match it against the provided patterns
3. Run the matching binary (or fallback) with the provided arguments

Building

Requirements

• Rust 1.85.0 or later
• LLVM 19 or later
• C++ compiler