An FPGA approach to quantifying coherence traffic efficiency on multiprocessor systems

Taeweon Suh, Shih Lien Lu, Hsien Hsin S. Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Recently, there is a surge of interests in using FPGAs for computer architecture research including applications from emulating and analyzing a new platform to accelerating microarchitecural simulation speed for design space exploration. This paper proposes and demonstrates a novel usage of FPGAs for measuring the efficiency of coherent traffic of an actual computer system. Our approach employs an FPGA acting as a bus agent, interacting with a real CPU in a dual processor system to measure the intrinsic delay of co-herence traffic. This technique eliminates non-deterministic factors in the measurement, such as the arbitration delay and stall in the pipelined bus. It completely isolates the impact of pure coherence traffic delay on system performance while executing workloads natively. Our experiments show that the overall execution time of the benchmark programs on a system with coherence traffic was actually increased over one without coherent traffic. It indicates that cache-to-cache transfers are less efficient in an Intel-based server system, and there exists room for further improvement such as the inclusion of the O state and cache line buffers in the memory controller.

Original languageEnglish
Title of host publicationProceedings - 2007 International Conference on Field Programmable Logic and Applications, FPL
Pages47-53
Number of pages7
DOIs
Publication statusPublished - 2007 Dec 1
Externally publishedYes
Event2007 International Conference on Field Programmable Logic and Applications, FPL - Amsterdam, Netherlands
Duration: 2007 Aug 272007 Aug 29

Publication series

NameProceedings - 2007 International Conference on Field Programmable Logic and Applications, FPL

Other

Other2007 International Conference on Field Programmable Logic and Applications, FPL
CountryNetherlands
CityAmsterdam
Period07/8/2707/8/29

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ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering

Cite this

Suh, T., Lu, S. L., & Lee, H. H. S. (2007). An FPGA approach to quantifying coherence traffic efficiency on multiprocessor systems. In Proceedings - 2007 International Conference on Field Programmable Logic and Applications, FPL (pp. 47-53). [4380624] (Proceedings - 2007 International Conference on Field Programmable Logic and Applications, FPL). https://doi.org/10.1109/FPL.2007.4380624