NDLI: Synthesis of Heterogeneous Distributed Architectures for Memory-Intensive Applications

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Synthesis of Heterogeneous Distributed Architectures for Memory-Intensive Applications

Content Provider	ACM Digital Library
Author	Raghunathan, Anand Jha, Niraj K. Huang, Chao Ravi, Srivaths
Abstract	Memory-intensive applications present unique challenges to an ASICdesigner in terms of the choice of memory organization, memory size requirements,bandwidth and access latencies, etc. The high potential of single-chip distributed logic-memory architectures in addressing many of these issues has been recognized ingeneral-purpose computing, and more recently in ASIC design. However, such architectureswill be adopted widely by designers only when general techniques and toolsfor efficient high-level synthesis (HLS) of multi-partitioned ASICs become available.The techniques presented in this paper are motivated by the fact that many memory-intensiveapplications exhibit irregular array data access patterns (due to conditionalsin loop nests, etc.). Synthesis should, therefore, be capable of determining a partitionedarchitecture, wherein array data and computations may have to be heterogeneouslydistributed for achieving the best performance speedup. Furthermore, the synthesismethodology should not be restricted by the nature of array index functions (affine orotherwise) in a behavior. Therefore, our methodology employs simulation to provideinformation about the access patterns of array data references in a behavior, which isused by the rest of our analysis. We use a combination of clustering and min-cut stylepartitioning techniques to partition the behavior into sub-behaviors while consideringvarious factors including data access locality, balanced workloads, inter-partitioncommunication, etc. Finally, we also employ an iterative improvement strategy to determinethe best way of distributing array data into physical memory in each partition.Our experiments with several benchmark applications show that the proposed techniquescan yield partitioned architectures that can achieve upto 2.2X performancespeed-up over conventional HLS solutions, while achieving upto 1.6X performancespeedup over the best homogeneous partitioning solution feasible.
File Format	PDF
ISBN	1581137621
ISSN	10923152
DOI	10.1109/ICCAD.2003.134
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2003-11-09
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Software Computer Science Applications

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