Versa: A 36-Core Systolic Multiprocessor with Dynamically Reconfigurable Interconnect and Memory

Sung Kim, Morteza Fayazi, Alhad Daftardar, Kuan Yu Chen, Jielun Tan, Subhankar Pal, Tutu Ajayi, Yan Xiong, Trevor Mudge, Chaitali Chakrabarti, David Blaauw, Ronald Dreslinski, Hun Seok Kim

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We present Versa, an energy-efficient 36-core systolic multiprocessor with dynamically reconfigurable interconnects and memory. Versa leverages reconfigurable functional units and systolic-enhanced ARM cores to adapt for different algorithm characteristics, providing optimized bandwidth, access latency, and data reuse. Hardware support for crucial thread-synchronization operations enables a tree-based algorithm with 6.5 times improvement in synchronization latency. Measured on a diverse set of compute kernels, Versa's design features culminate in median energy-efficiency improvements of 37.2 times and 11.6 times over mobile CPU and GPU baselines, respectively.

Original languageEnglish (US)
Pages (from-to)986-998
Number of pages13
JournalIEEE Journal of Solid-State Circuits
Issue number4
StatePublished - Apr 1 2022
Externally publishedYes


  • Accelerators
  • data movement
  • data reuse
  • energy efficiency
  • interconnect
  • multicore architecture
  • on-chip memory
  • programmability
  • reconfiguration
  • systolic arrays

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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