IEEE Transactions on Parallel and Distributed Systems

IEEE Transactions on Parallel and Distributed Systems (TPDS) is a scholarly archival journal published monthly. Parallelism and distributed computing are foundational research and technology to rapidly advance computer systems and their applications. Read the full scope of TPDS

IEEE Transactions on Parallel and Distributed Systems (TPDS) has moved to the OnlinePlus publication model.

From the February 2015 Issue

On-Chip Active Messages for Speed, Scalability, and Efficiency

By R. Harting, William Dally

Free Featured ArticleThis paper describes and quantifies the benefits of adding low-overhead active messages to many-core, cache-coherent chip-multiprocessors. The active messages we analyze are user defined and trigger the atomic execution of a custom software handler at the destination. Programmers can use these active messages to both move data with less overhead than cache coherency and, more importantly, explicitly send computation to data. Doing so greatly improves (11$\times$ speed, 4.8 $\times$ energy) communication idioms such as shared object modification, reductions, data walks, point-to-point communication, and all-to-all communication. Active messages enhance program scalability: applications using them run 63 percent faster with 11 percent less energy on 256 cores. The relative benefits of active messages grow with larger numbers of cores.

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Editorials and Announcements


  • EICs Undergoing Reappointment for 2016-2017 Terms: IEEE Computer Society publications have editors in chief who are currently standing for reap­pointment to a second two-year term. The Publications Board invites comments upon the tenures of the individual editors. Please click here for more details.

  • According to Thomson Reuters' 2013 Journal Citation Report, TPDS has an impact factor of 2.173.

  • TPDS celebrates its 25th Anniversary. Editor-in-Chief David A. Bader says, "Congratulations to TPDS on its Silver Jubilee! For 25 years, TPDS has been the parallel and distributed computing community's flagship journal for research breakthroughs!"

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