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Publications of Torsten Hoefler
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T. Hoefler:

 High-Performance Distributed RMA Locks

(Presentation - presented in Austin, TX, Feb. 2017, Seminar at ARM Research )

Abstract

We propose a topology-aware distributed Reader-Writer lock that accelerates irregular workloads for supercomputers and data centers. The core idea behind the lock is a modular design that is an interplay of three distributed data structures: a counter of readers/writers in the critical section, a set of queues for ordering writers waiting for the lock, and a tree that binds all the queues and synchronizes writers with readers. Each structure is associated with a parameter for favoring either readers or writers, enabling adjustable performance that can be viewed as a point in a three dimensional parameter space. We also develop a distributed topology-aware MCS lock that is a building block of the above design and improves state-of-the-art MPI implementations. Both schemes use non-blocking Remote Memory Access (RMA) techniques for highest performance and scalability. We evaluate our schemes on a Cray XC30 and illustrate that they outperform state-of-the-art MPI-3 RMA locking protocols by 81% and 73%, respectively. Finally, we use them to accelerate a distributed hashtable that represents irregular workloads such as key-value stores or graph processing.

Documents

download slides:
 

BibTeX

@misc{hoefler-scalable-rma-locks-arm,
  author={T. Hoefler},
  title={{High-Performance Distributed RMA Locks}},
  year={2017},
  month={Feb.},
  location={Austin, TX},
  note={Seminar at ARM Research},
  source={http://www.unixer.de/~htor/publications/},
}

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