Single-ISA heterogeneous multi-core architectures for multithreaded workload performance

Rakesh Kumar, Dean M. Tullsen, Parthasarathy Ranganathan, Norman P. Jouppi, Keith I. Farkas

Research output: Contribution to journalConference articlepeer-review


A single-ISA heterogeneous multi-core architecture is a chip multiprocessor composed of cores of varying size, performance, and complexity. This paper demonstrates that this architecture can provide significantly higher performance in the same area than a conventional chip multiprocessor. It does so by matching the various jobs of a diverse workload to the various cores. This type of architecture covers a spectrum of workloads particularly well, providing high single-thread performance when thread parallelism is low, and high throughput when thread parallelism is high. This paper examines two such architectures in detail, demonstrating dynamic core assignment policies that provide significant performance gains over naive assignment, and even outperform the best static assignment. It examines policies for heterogeneous architectures both with and without multithreading cores. One heterogeneous architecture we examine outperforms the comparable-area homogeneous architecture by up to 63%, and our best core assignment strategy achieves up to 31% speedup over a naive policy.

Original languageEnglish (US)
Pages (from-to)64-75
Number of pages12
JournalConference Proceedings - Annual International Symposium on Computer Architecture, ISCA
StatePublished - 2004
Externally publishedYes
EventProceedings -31st Annual International Symposium on Computer Architecture - Munich, Germany
Duration: Jun 19 2004Jun 23 2004

ASJC Scopus subject areas

  • Hardware and Architecture


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