3D Graphics Driver Frame Splitting With Early Command Buffer Flush
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Solution Overview
Problem
The generation of command buffers on a CPU becomes a bottleneck as GPUs increase in size, leading to degraded CPU-bound workloads and GPU performance due to conventional approaches of splitting frames into multiple smaller command buffers.
Innovation Solution
A graphics driver analyzes previous frames to determine optimal points for splitting command buffers, incorporating early flush instructions to reduce wait times and submission costs, thereby enhancing performance by selectively deciding whether to split command buffers based on GPU utilization and write events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the command buffer is split into multiple smaller command buffers, then the CPU bottleneck is alleviated and GPU performance is improved, but the submission cost increases and CPU-bound workloads are degraded
Solution Approach 1:
The command buffer is divided into multiple smaller command buffers based on analysis of previous frames. The graphics driver identifies optimal split points by examining GPU utilization patterns and write events from historical frame data, then divides the current frame's command buffer accordingly. This segmentation allows the GPU to process smaller chunks of work more efficiently while the CPU can prepare subsequent command buffers in parallel, reducing the overall submission cost and improving GPU performance without excessively degrading CPU-bound workloads.
Data Source
AI summary
Methods, systems and apparatuses may provide for technology that marks a graphics resource as a flush candidate during a current frame, conducts an early flush of a command buffer from the graphics resource if a write event is detected with respect to the graphics resource during a subsequent frame, and bypasses the early flush if the write event is not detected with respect to the graphics resource during the subsequent frame. In one example, the graphics resource is marked as the flush candidate in response to a read back operation of the host processor with respect to the graphics resource, wherein the read back operation retrieves a query result and/or maps a staging resource.