RT-kNNS Unbound: Using RT Cores to Accelerate Unrestricted Neighbor Search
RT-kNNS Unbound: Using RT Cores to Accelerate Unrestricted Neighbor Search
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RT-kNNS Unbound:使用 RT 内核加速无限制邻居搜索
DOI:
10.1145/3577193.3593738
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Kulkarni, Milind
中科院分区:
文献类型:
--
作者:
Nagarajan, Vani;Mandarapu, Durga;Kulkarni, Milind
The problem of identifying the k-Nearest Neighbors (kNNS) of a point has proven to be very useful both as a standalone application and as a subroutine in larger applications. Given its far-reaching applicability in areas such as machine learning and point clouds, extensive research has gone into leveraging GPU acceleration to solve this problem. Recent work has shown that using Ray Tracing cores in recent GPUs to accelerate kNNS is much more efficient compared to traditional acceleration using shader cores. However, the existing translation of kNNS to a ray tracing problem imposes a constraint on the search space for neighbors. Due to this, we can only use RT cores to acceleratefixed-radiuskNNS, which requires the user to set a search radiusa prioriand hence can miss neighbors. In this work, we propose TrueKNN, the firstunboundedRT-accelerated neighbor search. TrueKNN adopts an iterative approach where we incrementally grow the search space until all points have found theirkneighbors. We show that our approach is orders of magnitude faster than existing approaches and can even be used to accelerate fixed-radius neighbor searches.
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