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Proceedings of the 40th Annual International Symposium on Computer Architecture
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Proceedings of the 40th Annual International Symposium on Computer Architecture
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In this paper, we propose Database Processing Units, or DPUs, a class of domain-specific database processors that can efficiently handle database applications. As a proof of concept, we present the instruction set architecture, microarchitecture, and hardware implementation of one DPU, called Q100. The Q100 has a collection of heterogeneous ASIC tiles that process relational tables and columns quickly and energy-efficiently. The architecture uses coarse grained in- structions that manipulate streams of data, thereby maximizing pipeline and data parallelism, and minimizing the need to time multiplex the accelerator tiles and spill inter- mediate results to memory. This work explores a Q100 de- sign space of 150 configurations, selecting three for further analysis: a small, power-conscious implementation, a high- performance implementation, and a balanced design that maximizes performance per Watt. We then demonstrate that the power-conscious Q100 handles the TPC-H queries with three orders of magnitude less energy than a state of the art software DBMS, while the performance-oriented design out- performs the same DBMS by 70X.