Analytic multi-core processor model for fast design-space exploration

Rik Jongerius, Andreea Anghel, Gero Dittmann, Giovanni Mariani, Erik Vermij, Henk Corporaal

Research output: Contribution to journalArticleAcademicpeer-review

19 Citations (Scopus)
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Simulators help computer architects optimize system designs. The limited performance of simulators even of moderate size and detail makes the approach infeasible for design-space exploration of future exascale systems. Analytic models, in contrast, offer very fast turn-around times. In this paper we propose an analytic multi-core processor-performance model that takes as inputs a) a parametric microarchitecture-independent characterization of the target workload, and b) a hardware configuration of the core and the memory hierarchy. The processor-performance model considers instruction-level parallelism (ILP) per type, models single instruction, multiple data (SIMD) features, and considers cache and memory-bandwidth contention between cores. We validate our model by comparing its performance estimates with measurements from hardware performance counters on Intel Xeon and ARM Cortex-A15 systems. We estimate multi-core contention with a maximum error of 11.4 percent. The average single-thread error increases from 25 percent for a state-of-the-art simulator to 59 percent for our model, but the correlation is still 0.8, a high relative accuracy, while we achieve a speedup of several orders of magnitude. With a much higher capacity than simulators and more reliable insights than back-of-the-envelope calculations it makes automated design-space exploration of exascale systems possible, which we show using a real-world case study from radio astronomy.

Original languageEnglish
Pages (from-to)755-770
Number of pages16
JournalIEEE Transactions on Computers
Issue number6
Publication statusPublished - 1 Jun 2018


  • Analytical models
  • Computational modeling
  • Hardware
  • Modeling of computer architecture
  • multi-core processors
  • Multicore processing
  • Program processors
  • SIMD processors
  • Tools


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