Redistribution of generated geometric primitives

摘要

One embodiment of the present invention sets forth a technique for redistributing geometric primitives generated by tessellation and geometry shaders for per-vertex by multiple graphics pipelines. Geometric primitives that are generated in a first processing stage are collected and redistributed more evenly and in smaller batches to the multiple graphics pipelines for vertex processing in a second processing stage. The smaller batches do not exceed the resource limits of a graphics pipeline and the per-vertex processing workloads of the graphics pipelines in the second stage are balanced. Therefore, the performance of the tessellation and geometry shaders is improved.

主权项

1. A method for distributing generated geometric primitives for processing by streaming multiprocessors, the method comprising:
executing a hull shader program by a first set of the streaming multiprocessors to process surface patches and generate tessellation data for each surface patch including tessellation level-of-detail values that define generated geometric primitives for each surface patch; generating tasks for processing the generated geometric primitives based on resource limitations of a streaming multiprocessor configured to execute one of the tasks and the level-of-detail values; and distributing the tasks to a second set of the streaming multiprocessors to process the tasks according to a domain shader program to produce processed vertices of the surface patches, wherein a first streaming multiprocessor included in the first set of the streaming multiprocessors is not also included in the second set of the streaming multiprocessors.