We present a bandwidth- and energy-efficient, hybrid ray tracing and rasterizer architecture for tile-based mobile GPU. In order to successfully commercialize mobile System on Chip (SoC), including ray tracing hardware solution, effective integration with rasterizer based on OpenGLjES is indispensable for the performance and compatibility reason. Thus, recently, the traditional rasterizer-ray tracing hybrid approach is revisited to achieve this goal. The key factor for hybrid rendering is to reflect the fundamental principle of tile-based rendering on integrating the ray tracing hardware and mobile GPUs. Consequently, we propose a new architecture for hybrid rendering by combining new three features such as extended tile binning unit, tile prefetch, and per-tile power control. Simulation results show that our architecture is a potentially versatile solution for future mobile GPUs in low-energy devices because it provides as much as 31.7% better G-buffer bandwidth utilization and is up to 2.18 times better performance per unit energy compared to the ray tracing hardware-only solution.

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Presenter(s)

Won Jong Lee , Samsung Advanced Institute of Technology (SAIT)

Seok Joong Hwang , Samsung Advanced Institute of Technology (SAIT)

Youngsam Shin , Samsung Advanced Institute of Technology (SAIT)

Jeong-Joon Yoo , Samsung Advanced Institute of Technology (SAIT)

Soojung Ryu , Samsung Advanced Institute of Technology (SAIT)