VMU Profiler

Real-Time Visual Memory Unit Profiler for KallistiOS-Based Sega Dreamcast Applications

Background

The VMU Profiler was created as a profiling tool for the Grand Theft Auto 3 port to the Sega Dreamcast as a way to gather real-time scene and resource statistics on actual hardware, rather than relying on emulators. Modified with extensibility for the Doom 64 port to the Sega Dreamcast.

Statistics

- WHATEVER YOU WANT

Features

- Runs in a background thread, no blocking on Maple
- Configurable polling interval, sleeps in between updates
- Configurable background thread priority
- Configurable VMU port to display on
- Configurable frames to average for smooth FPS counting
- User-defined/configurable statistics

Usage

extern int xform_verts;
void update_transformed_verts(vmu_profiler_measurement_t *m)
{
	m->ustorage = (size_t)xform_verts;
}


void setup_measures(struct vmu_profiler *p) {
	vmu_profiler_measurement_t *xv_msr = init_measurement("TVRT", use_unsigned, update_transformed_verts);
	vmu_profiler_add_measure(p, xv_msr);
}


int main(int argc, char* argv[]) {
	// initialize video
	// initialize audio

	vmu_profiler_start(<optional configuration>, setup_measures);

	// Start the game loop
	while(!done) {
		// Update every frame
		vmu_profiler_update();
	}

	vmu_profiler_stop();

	return 0;
}

Building

Idk, drop them in your program source folder :-)

Acknowledgements

100% inspired by the badass FPS monitor in Bloom, the incredible PS1 emulator for Sega Dreamcast by Paul Cercuei.