Memory Stats

A cross-platform memory profiler for Rust, supporting Windows, Linux, and MacOS. This crate provides two metrics:

"Physical" Memory, which corresponds to the Resident Set Size on Linux and MacOS and the Working Set on Windows.
"Virtual" Memory, which corresponds to the Virtual Size on Linux and MacOS and the Pagefile Usage on Windows.

Usage

Add memory-stats as a dependency to your Cargo.toml:

[dependencies]
memory-stats = "1.2.0"

Optional Features

serde: Enables serialization and deserialization of the MemoryStats struct.

Example

Here's an example that prints out the current memory usage:

use memory_stats::memory_stats;

fn main() {
    if let Some(usage) = memory_stats() {
        println!("Current physical memory usage: {}", usage.physical_mem);
        println!("Current virtual memory usage: {}", usage.virtual_mem);
    } else {
        println!("Couldn't get the current memory usage :(");
    }
}

Caveats

Getting accurate memory usage on Linux is fairly expensive and not always possible. This crate always attempts to use the statistics from /proc/self/smaps if avaliable. However, since support for /proc/self/smaps might not be compiled in on all kernels, this crate will also use the faster but less accurate statistics from /proc/self/statm as a fallback.

If speed is needed over accuracy, the always_use_statm feature can be enabled to always use the /proc/self/statm statistics.

License

This crate is dual-licensed under either:

the Apache License, Version 2.0
the MIT license

at your option.