基于绘制历史的sort-first集群绘制负载平衡方法

Load balancing method based on render history in cluster rendering

负载平衡对sort-first集群并行绘制系统的性能有很大影响,但静态负载平衡方法适应性较差。而动态方法中,基于几何数据遍历的方法不具备实用性,基于粗粒度几何数据组织的方法在实际中得到应用,但依赖于对几何数据的预处理。为此,提出了一种实用的、基于绘制历史的负载平衡方法:它不依赖于几何数据,用以前帧的绘制时间和负载分布信息作为未来帧绘制负载分配计算的输入。在集群绘制平台上的测试和比较表明,该方法有很好的效果。

Performance of son-first cluster parallel rendering system is gready influenced by load balance. Static load balancing method is poorly adaptive. As to dynamical methods, those based on geometry data traversing are not practical, and those based on coarse geometry data granularity can be put into practice but depend on the pretreatment of geometry data. Therefore, a practical load balancing method based on render history was proposed. This method does not depend on geometry data, but utilizes render time of previous frame and its information of load distribution as the input of load balancing for the next frame＇s rendering. The method is tested on cluster rendering platform and the test results show that it is very effective.