optick

Rust API for Optick Profiler

Supported Platforms

How to use

In Cargo.toml add:

[dependencies]
optick = "1.3.4"

Example 1 (generic app, automation, etc.):

fn calc(n: u32) {
	// Profile current scope (automatically extracts current function name)
	// You could also specify a custom name if needed - e.g. optick::scope!("calc");
	optick::event!();

	// Attach custom data tag to the capture (i32, u32, u64, f32, str, vec3)
	optick::tag!("number", n);
	optick::tag!("name", "Bob");
	optick::tag!("position", (10.0f32, -12.0f32, 14.0f32));

	...
}

pub fn main() {
	// Start a new capture
	optick::start_capture();

	calc(42);
	
	// Stop and save current capture to {working_dir}/capture_name(date-time).opt
	optick::stop_capture("capture_name"); 
}

Example 2 (game):

fn update(frame_num: u32) {
    optick::event!();
    optick::tag!("frame", frame_num);
    std::thread::sleep(std::time::Duration::from_millis(33));
}

pub fn main() {
    let mut frame = 0; 
    loop {
        optick::next_frame();
        update(frame);
        frame = frame + 1;
    }
}

GUI

Use Optick GUI to open saved *.opt capture for further analysis: https://github.com/bombomby/optick/releases
After grabbing the latest available Optick_vX.X.X.zip => launch Optick.exe.

Video Tutorial (Features Overview)

Procedural Macros

Optick supports a set of procedural macros for simplifying the process of code markup: https://crates.io/crates/optick-attr

// Instrument current function
#[optick_attr::profile]
fn calc() {
    // Do some stuff
}
//Generate performance capture for function to {working_dir}/capture_name(date-time).opt.
#[optick_attr::capture("capture_name")]
pub fn main() {
    calc();
}

Feature flags

• enable - this flag is used by default and enables Optick instrumentation

Run as Administartor to collect ETW events

Optick uses ETW to collect hardware counters: switch-contexts, auto-sampling, CPU core utilization, etc. Run your app as administrator to enable the collection of ETW events:

Start-Process cargo run -Verb runAs