Multi-GPU Rendering with Vulkan API

Lars Olav Tolo
Department of Computing, Mathematics and Physics, Western Norway University of Applied Science Department of Informatics, University of Bergen
The University of Bergen, 2018


   title={Multi-GPU Rendering with Vulkan API},

   author={Tolo, Lars Olav},


   school={The University of Bergen}


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Vulkan API provides a low level interface to modern Graphics Processing Units (GPUs). With this thesis, we demonstrate how to use Vulkan to send commands explicitly to separate GPUs for implementing platform- and vendor independent multi-GPU rendering. We describe how to implement the sort-first and sort-last approaches to perform parallel rendering with Vulkan. We introduce an abstraction library which we have made available, and an application for multi-GPU rendering of meshes. The introduced solution is the first publicly available implementation of heterogeneous multi-GPU rendering with Vulkan API. The introduced abstraction library supports creating partial renderers for the sort-first and sort-last approaches to multi-GPU rendering, and takes care of the details of multi-GPU synchronization and compositing. Performance benchmarks have been performed in order to evaluate the implementation. The sort-last implementation has been tested to render geometry with high-resolution textures, which would otherwise not fit in the memory of a single GPU.
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