RTTM: real-time transactional memory

  • Authors:
  • Martin Schoeberl;Florian Brandner;Jan Vitek

  • Affiliations:
  • Vienna University of Technology, Austria;Vienna University of Technology, Austria;Purdue University

  • Venue:
  • Proceedings of the 2010 ACM Symposium on Applied Computing
  • Year:
  • 2010

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Abstract

Hardware transactional memory is a promising synchronization technology for chip-multiprocessors. It simplifies programming of concurrent applications and allows for higher concurrency than lock based synchronization. Standard transactional memory is optimized for average case throughput, but for real-time systems we are interested in worst-case execution times. We propose real-time transactional memory (RTTM) as a time-predictable synchronization solution for chip-multiprocessors in real-time systems. We define the hardware for time-predictable transactions and provide a bound for the maximum transaction retries. The proposed RTTM is evaluated with a simulation of a Java chip-multiprocessor.