Smaller split L-1 data caches for multi-core processing systems

Oluwayomi Adamo*, Afrin Naz, Tommy Janjusic, Krishna Kavi, Chung-Ping Chung

*Corresponding author for this work

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

4 Scopus citations

Abstract

As more cores (processing elements) are included in a single chip, it is likely that the sizes of per core L-1 caches will become smaller while more cores will share L-2 cache resources. It becomes more critical to improve the use of L-1 caches and minimize sharing conflicts for L-2 caches. In our prior work we have shown that using smaller but separate L-1 array data and L-1 scalar data cache, instead of a larger single L-1 data cache, can lead to significant performance improvements. In this paper we will extend our experiments by varying cache design parameters including block size, associativity and number of sets for L-1 array and L-1 scalar caches. We will also present the affect of separate array and scalar caches on the non-uniform accesses to different (L-1) cache sets exhibited while using a single (L-1) data cache. For this purpose we use third and fourth central moments (skewness and kurtosis), which characterize the access patterns. Our experiments show that for several embedded benchmarks (from MiBench) split data caches significantly mitigate the problem of non-uniform accesses to cache sets (leading to more uniform utilization of cache resources, reduction of conflicts to cache sets, and minimizing hot spots in cache). They also show that neither higher set-associativities nor large block sizes are necessary with split cache organizations.

Original languageEnglish
Title of host publicationI-SPAN 2009 - The 10th International Symposium on Pervasive Systems, Algorithms, and Networks
Pages74-79
Number of pages6
DOIs
StatePublished - 1 Dec 2009
Event10th International Symposium on Pervasive Systems, Algorithms, and Networks, I-SPAN 2009 - Kaohsiung, Taiwan
Duration: 14 Dec 200916 Dec 2009

Publication series

NameI-SPAN 2009 - The 10th International Symposium on Pervasive Systems, Algorithms, and Networks

Conference

Conference10th International Symposium on Pervasive Systems, Algorithms, and Networks, I-SPAN 2009
CountryTaiwan
CityKaohsiung
Period14/12/0916/12/09

Keywords

  • Cache memories
  • Split data cache
  • Uniform cache access patterns

Fingerprint Dive into the research topics of 'Smaller split L-1 data caches for multi-core processing systems'. Together they form a unique fingerprint.

  • Cite this

    Adamo, O., Naz, A., Janjusic, T., Kavi, K., & Chung, C-P. (2009). Smaller split L-1 data caches for multi-core processing systems. In I-SPAN 2009 - The 10th International Symposium on Pervasive Systems, Algorithms, and Networks (pp. 74-79). [5381964] (I-SPAN 2009 - The 10th International Symposium on Pervasive Systems, Algorithms, and Networks). https://doi.org/10.1109/I-SPAN.2009.118