Graphics Processor Task Issuing for Concurrent Rendering and Post-Processing
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Solution Overview
Problem
Existing graphics processing methods suffer from high latency and inefficient hardware utilization due to a strict processing barrier between rendering and post-processing passes, particularly in resource-constrained devices like mobile devices, which can lead to user discomfort in extended reality applications.
Innovation Solution
Concurrently issue post-processing tasks without waiting for all rendering tasks to complete, allowing for interleaved processing of rendering and post-processing tasks, including neural network processing, to reduce latency and improve hardware utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If post-processing tasks are issued only after all rendering tasks complete, then data dependency is satisfied, but processing latency increases and hardware utilization decreases
Solution Approach 1:
The system performs preliminary actions by issuing post-processing tasks before all rendering tasks complete, using prediction mechanisms to anticipate which rendering tasks will finish first. This allows post-processing to start early on available data rather than waiting for complete rendering output.
Solution Approach 2:
The system dynamically adjusts task issuance based on real-time rendering task completion status. The graphics processor monitors which rendering tasks have completed and dynamically issues post-processing tasks accordingly, rather than following a fixed sequential pattern.
2Productivity
If post-processing tasks are issued before all rendering tasks complete, then processing latency is reduced and hardware utilization improves, but risk of processing incomplete data increases
Solution Approach 1:
The system performs preliminary actions by issuing post-processing tasks before all rendering tasks complete, using prediction mechanisms to anticipate which rendering tasks will finish first. This allows post-processing to start early on available data rather than waiting for complete rendering output.
Solution Approach 2:
The system implements feedback mechanisms where the graphics processor continuously monitors rendering task completion status and uses this information to dynamically control post-processing task issuance. This feedback loop ensures that post-processing tasks are issued at optimal moments when data is available and reliable.
3Reliability
If strict sequential processing is used between rendering and post-processing, then data dependency is maintained, but memory bandwidth consumption increases
Solution Approach 1:
The system merges rendering and post-processing operations by allowing them to execute concurrently in an interleaved manner. Instead of completing all rendering tasks before starting post-processing, the system combines these operations so they can overlap in time, reducing the need for intermediate data storage and memory bandwidth consumption.
Solution Approach 2:
The system maintains continuity of useful action by eliminating idle periods between rendering and post-processing. While traditional sequential processing creates gaps where hardware sits idle waiting for data, this system keeps the graphics processor continuously productive by issuing post-processing tasks as soon as their dependent rendering tasks complete.
Data Source
AI summary
A graphics processor and method of operating a graphics processor to perform rendering followed by post-processing, in which post-processing tasks are permitted to be issued to processing cores of the graphics processor without waiting for all of the rendering tasks to have completed their processing, such that post-processing tasks are processed concurrently with rendering tasks.