Powered by OpenAIRE graph
Found an issue? Give us feedback
addClaim

Vector processor customization for FFT

Authors: Bogdan Spinean; Georgi Kuzmanov; Georgi Gaydadjiev;

Vector processor customization for FFT

Abstract

Processors and memory systems suffer from a growing performance gap between them. Each technology generation increases the on-chip performance capabilities however, memory bandwidth increases at a much slower pace. Therefore, overall performance improvements are constrained by the available memory bandwidth. In this paper, we address the memory bandwidth problem of vector processors by introducing hardware customizations which drastically reduce the memory transfers required by the FFT computation. We show that an FFT transform of length equal to the machine size Z can be performed using only O(Z) memory accesses, hence we reduce the memory bandwidth requirement by an order of O(log(Z)) compared to a conventional vector machine. We achieve bandwidth reduction by extending a classic IBM S/370 vector architecture for better register re-use. Our hardware extension completely eliminates the input bit reversal phase of the Cooley-Tukey FFT algorithm. Synthesis results suggest that our extension does not impact the machine cycle time and has a small hardware area overhead of the vector register file of under 4.5% while potentially improving vector performance by a factor of 7.5 for Z = 256.

Related Organizations
  • BIP!
    Impact byBIP!
    selected citations
    These citations are derived from selected sources.
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    3
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
Powered by OpenAIRE graph
Found an issue? Give us feedback
selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
3
Average
Average
Average
Upload OA version
Are you the author of this publication? Upload your Open Access version to Zenodo!
It’s fast and easy, just two clicks!