Graphics Pipeline Task Repacking for Efficiency
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Solution Overview
Problem
Existing graphics processing systems face inefficiencies due to partially filled tasks in graphics pipelines, leading to reduced efficiency and increased power consumption, particularly in tile-based rendering where tasks are not fully occupied and instances are depleted during execution.
Innovation Solution
A method of repacking tasks in a graphics pipeline by identifying eligible tasks at checkpoints and transferring instances between compatible, non-conflicting tasks to fully occupy tasks and reduce the overall number of tasks, using hardware logic to manage task repacking and scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If tasks are not fully occupied in the graphics pipeline, then the pipeline can handle diverse rendering operations, but the efficiency and power consumption are reduced
Solution Approach 1:
The patent merges instances from multiple partially-filled tasks into a single fully-occupied task. The repacking unit combines data items (instances) from different tasks that target the same pixel addresses, creating a consolidated task that fully occupies the pipeline execution units, thereby improving efficiency while reducing the number of active tasks and power consumption
2Manufacturing precision
If the number of tasks is increased to handle overlapping fragments, then rendering accuracy is improved, but the overall number of tasks executed increases reducing efficiency
Solution Approach 1:
The patent merges multiple tasks that process overlapping fragments into a single repacked task. By combining instances from multiple tasks that operate on the same pixel addresses, the system maintains accurate rendering of overlapping fragments while reducing the total number of tasks from N to 1, thereby improving pipeline efficiency
3Reliability
If instances are depleted during task execution, then correct rendering of transparent fragments is achieved, but task utilization is reduced
Solution Approach 1:
The patent performs preliminary repacking of instances into fully-occupied tasks before execution. By pre-consolidating instances from multiple tasks into a single task that fully utilizes the pipeline, the system ensures correct rendering of transparent fragments through proper instance depletion while maximizing task utilization from the start
Data Source
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AI summary
A method of repacking tasks in a graphics pipeline is described. The method comprises, in response to a task reaching a checkpoint in a program, determining if the task is eligible for repacking. If the task is eligible for repacking, the task is de-scheduled and it is determined whether repacking conditions are satisfied. In the event that the repacking conditions are satisfied, the method looks for a pair of compatible and non-conflicting tasks at the checkpoint. If such a pair of tasks are found, one or more instances are transferred between the pair of tasks.