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Software Pipelining for Stream Programs on Resource Constrained Multicore Architectures

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5 Author(s)
Haitao Wei ; Sch. of Comput. Sci. & Technol., HuaZhong Univ. of Sci. & Technol., Wuhan, China ; Junqing Yu ; Huafei Yu ; Mingkang Qin
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Stream programming model has been productively applied to a number of important application domains. Software pipelining is an important code scheduling technique for stream programs. However, the multicore evolution has presented a new dimension of challenges: that is how to orchestrate the best software pipelining schedule in the face of resource constrained architectures (e.g., number of cores, available memory, and bandwidth)? In this paper, we proposed a new solution methodology to address the problem above. Our main contributions include the following. A unified Integer Linear Programming (ILP) formulation has been proposed that combines the requirement of both rate-optimal software pipelining and the minimization of intercore communication overhead. Next, an extended formulation has been proposed to formulate the schedule under memory size constrained systems. It orchestrates the rate-optimal software pipelining execution for stream programs with strict memory, processor cores, and communication constraints. A solution testbed has been implemented for the proposed problem formulations. This has been realized by extending the Brook programming environment with our software pipelining support-named DFBrook. An experimental study has been conducted to verify the effectiveness of the proposed solutions.

Published in:

Parallel and Distributed Systems, IEEE Transactions on  (Volume:23 ,  Issue: 12 )