Omnia vincit amor
Home -> Publications
all years
    edited volumes
  Full CV [pdf]


  Past Events

Publications of Torsten Hoefler
Copyright Notice:

The documents distributed by this server have been provided by the contributing authors as a means to ensure timely dissemination of scholarly and technical work on a noncommercial basis. Copyright and all rights therein are maintained by the authors or by other copyright holders, notwithstanding that they have offered their works here electronically. It is understood that all persons copying this information will adhere to the terms and constraints invoked by each author's copyright. These works may not be reposted without the explicit permission of the copyright holder.

T. Schulthess, P. Bauer, O. Fuhrer, T. Hoefler, C. Schaer, N. Wedi:

 Reflecting on the goal and baseline for exascale computing: a roadmap based on weather and climate simulations

(Computing in Science and Engineering (CiSE). Vol 21, Nr. 1, IEEE Computer Society, ISSN: 1521-9615, Jan. 2019)

Publisher Reference


We present a roadmap towards exascale computing based on true application performance goals. It is based on two state-of-the art European numerical weather prediction models (IFS from ECMWF and COSMO from MeteoSwiss) and their current performance when run at very high spatial resolution on present-day supercomputers. We conclude that these models execute about 100-250 times too slow for operational throughput rates at a horizontal resolution of 1 km, even when executed on a full petascale system with nearly 5,000 state-of-the-art hybrid GPU-CPU nodes. Our analysis of the performance in terms of a metric that assesses the efficiency of memory use shows a path to improve the performance of hardware and software in order to meet operational requirements early next decade.


download article:


  author={T. Schulthess and P. Bauer and O. Fuhrer and T. Hoefler and C. Schaer and N. Wedi},
  title={{Reflecting on the goal and baseline for exascale computing: a roadmap based on weather and climate simulations}},
  journal={Computing in Science and Engineering (CiSE)},
  publisher={IEEE Computer Society},

serving:© Torsten Hoefler