nvml-wrapper

A complete, safe, and ergonomic Rust wrapper for the NVIDIA Management Library (NVML), a C-based programmatic interface for monitoring and managing various states within NVIDIA (primarily Tesla) GPUs.

extern crate nvml_wrapper as nvml;
use nvml::NVML;

let nvml = NVML::init()?;
// Get the first `Device` (GPU) in the system
let device = nvml.device_by_index(0)?;

let brand = device.brand()?; // GeForce on my system
let fan_speed = device.fan_speed(0)?; // Currently 17% on my system
let power_limit = device.enforced_power_limit()?; // 275k milliwatts on my system
let encoder_util = device.encoder_utilization()?; // Currently 0 on my system; Not encoding anything
let memory_info = device.memory_info()?; // Currently 1.63/6.37 GB used on my system

// ... and there's a whole lot more you can do. Everything in NVML is wrapped and ready to go

NVML is intended to be a platform for building 3rd-party applications, and is also the underlying library for NVIDIA's nvidia-smi tool.

Compilation

The NVML library comes with the NVIDIA drivers and is essentially present on any system with a functioning NVIDIA graphics card. The compilation steps vary between Windows and Linux, however.

Windows

I have been able to successfully compile and run this wrapper's tests using both the GNU and MSVC toolchains. An import library (nvml.lib) is included for compilation with the MSVC toolchain.

The NVML library dll can be found at %ProgramW6432%\NVIDIA Corporation\NVSMI\ (which is C:\Program Files\NVIDIA Corporation\NVSMI\ on my machine). I had to add this folder to my PATH or place a copy of the dll in the same folder as the executable in order to have everything work properly at runtime with the GNU toolchain. You may need to do the same; I'm not sure if the MSVC toolchain needs this step or not.

Linux

The NVML library can be found at /usr/lib/nvidia-<driver-version>/libnvidia-ml.so; on my system with driver version 375.51 installed, this puts the library at /usr/lib/nvidia-375/libnvidia-ml.so.

The sys crates' build script will automatically add the appropriate directory to the paths searched for the library, so you shouldn't have to do anything manually in theory.

NVML Support

This wrapper is being developed against and currently supports NVML version 10.1. Each new version of NVML is guaranteed to be backwards-compatible according to NVIDIA, so this wrapper should continue to work without issue regardless of NVML version bumps.

Rust Version Support

Currently supports Rust 1.26.0 or greater. The target version is the latest stable version; I do not intend to pin to an older one at any time.

Cargo Features

The serde feature can be toggled on in order to #[derive(Serialize, Deserialize)] for every NVML data structure.

License

Licensed under either of

Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

nvml-wrapper 0.5.0