This dataset presents measurements that quantify the clock synchronization
time-agreement characteristics among several high performance computers including
the current world's most powerful machine for open science--the U.S. Department
of Energy's Titan machine sited at Oak Ridge National Laboratory. These ultra-fast
machines derive much of their computational capability from extreme node counts (over
18000 nodes in the case of the Titan machine). Time-agreement is commonly utilized by
parallel programming applications and tools, distributed programming application and
tools, and system software. Our time-agreement measurements detail the degree of time
variance between nodes and how that variance changes over time. The dataset includes
empirical measurements and the accompanying spreadsheets.
For more information and an analysis of the measurements, please consult the following paper:
- Terry Jones, George Ostrouchov, Gregory A. Koenig, Oscar H. Mondragon, and Patrick G. Bridges.
Time Gremlins: The Unsatisfying State of Time Agreement on Extreme-Scale Supercomputers.
(submitted)
This data is available to researchers. To access the data, please contact
