Multi-GPU Image Rendering via Pose Data Offloading
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Solution Overview
Problem
The existing single dedicated Graphics Processing Unit (GPU) is overwhelmed when performing multiple simultaneous graphics processing tasks, leading to increased context switching time and reduced productivity and efficiency due to resource competition and interference.
Innovation Solution
A system comprising multiple graphics processing units, where a second GPU processes pose-tracking data to generate framebuffer data and sends it to a first GPU for post-processing and display, optimizing resource usage and minimizing context switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single dedicated GPU is employed to generate visual content, then the system structure is simple, but the GPU resources are extremely overburdened and context switching time increases
Solution Approach 1:
The system divides the single GPU into multiple virtual GPUs through virtualization technology. Each virtual GPU can independently execute graphics processing tasks simultaneously, effectively increasing GPU productivity without adding physical hardware complexity. The virtualization layer segments the physical GPU resources into multiple isolated execution contexts.
Solution Approach 2:
The single physical GPU is designed to perform multiple functions by supporting concurrent execution of multiple virtual GPU instances. Each virtual GPU can handle different graphics processing tasks (rendering, compute, video processing) simultaneously, making the single device universally capable of handling diverse workloads without requiring multiple dedicated units.
2Use of energy by moving object
If multiple graphics processing tasks are performed simultaneously on a single GPU, then resource utilization increases, but interference between tasks occurs and context switching time increases
Solution Approach 1:
The system segments the execution context into multiple isolated virtual GPU instances, each capable of independent task execution. This segmentation prevents interference between graphics processing tasks by providing separate execution contexts, memory spaces, and resource allocations for each virtual GPU, thereby eliminating context switching overhead while maintaining high resource utilization through concurrent virtual instance execution.
Solution Approach 2:
A virtualization intermediary layer is introduced between the physical GPU and multiple graphics processing tasks. This intermediary manages resource allocation and task scheduling, allowing multiple tasks to run simultaneously on the single GPU without direct interference. The intermediary handles context isolation and resource arbitration, preventing task interference while maximizing GPU resource utilization.
3Productivity
If GPU resources are shared by two or more graphics processing tasks, then resource efficiency improves, but interference between tasks occurs
Solution Approach 1:
The system segments shared GPU resources into isolated virtual GPU instances, each with dedicated resource allocations within the virtualized environment. This segmentation allows efficient resource sharing at the physical level while maintaining execution stability through virtual isolation boundaries. Each virtual GPU receives guaranteed resource portions, preventing one task from interfering with another's execution stability.
Solution Approach 2:
The virtualization intermediary acts as a mediator between multiple graphics processing tasks sharing the GPU. It implements resource arbitration and isolation mechanisms that ensure each task receives fair resource allocation while preventing interference. The intermediary manages memory spaces, compute resources, and execution contexts separately for each virtual GPU, maintaining task execution stability while achieving high overall resource efficiency.
Data Source
AI summary
A system for producing image frames for display at display device. The system includes graphics processing units including first graphics processing unit and second graphics processing unit that are communicably coupled to each other and pose-tracking means. Second graphics processing unit is configured to: process pose-tracking data, to determine device pose and velocity and/or acceleration with which device pose is changing; execute rendering application(s) to generate framebuffer data corresponding to image frame; and send, to first graphics processing unit, framebuffer data and information indicative of device pose and velocity and/or acceleration. First graphics processing unit is configured to: execute first compositing application to post-process framebuffer data, based at least on said information; and drive light source(s) using post-processed framebuffer data to display image frame.


