NDLI: Achieving efficient packet-based memory system by exploiting correlation of memory requests

Content Provider	IEEE Xplore Digital Library
Author	Tianyue Lu Licheng Chen Mingyu Chen
Copyright Year	2014
Description	Author affiliation: State Key Lab. of Comput. Archit., Inst. of Comput. Technol., Beijing, China (Tianyue Lu; Licheng Chen; Mingyu Chen)
Abstract	Packet-based interface is a trend for future memory system to alleviate memory capacity and bandwidth bottlenecks. On the other hand fine-grained memory access has been proven to efficiently reduce memory power. However leveraging both these two technologies will result in high packet overhead, because previous implementations of packet-based interface all adopt a simple design that a single packet is dedicated to a single request (SPSR). In this paper, we propose three optimizations to overcome the problem by exploiting correlations of memory requests. First, we propose a novel single packet multiple requests (SPMR) interface that encapsulates multiple requests into a packet to share packet header and tail. Second, we propose an adaptive address compression mechanism within a packet by adopting a base-difference algorithm. Third, we propose a mechanism to merge multiple memory requests with continuous access addresses into a single request before packing. By this way, the granularity constraint of cache line size is broken to enable efficiently row buffer scheduling. The experimental results show that, for certain memory-intensive workloads, the optimizations can effectively reduce packet overhead by about 53.9% and improve system performance by about 63.6% in average.
Starting Page	1
Ending Page	6
File Size	191031
Page Count	6
File Format	PDF
ISBN	9783981537024
DOI	10.7873/DATE.2014.090
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-03-24
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	European Design Automation Association (EDAA)
Subject Keyword	Random access memory Bandwidth Payloads System-on-chip Layout Market research Optimization
Content Type	Text
Resource Type	Article

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