SCHEDULE: NOV 10-16, 2012
When viewing the Technical Program schedule, on the far righthand side is a column labeled "PLANNER." Use this planner to build your own schedule. Once you select an event and want to add it to your personal schedule, just click on the calendar icon of your choice (outlook calendar, ical calendar or google calendar) and that event will be stored there. As you select events in this manner, you will have your own schedule to guide you through the week.
A Divide and Conquer Strategy for Scaling Weather Simulations with Multiple Regions of Interest
SESSION: Weather and Seismic Simulations
EVENT TYPE: Papers, Best Student Paper Finalists
TIME: 3:30PM - 4:00PM
SESSION CHAIR: Amik St-Cyr
AUTHOR(S):Preeti Malakar, Thomas George, Sameer Kumar, Rashmi Mittal, Vijay Natarajan, Yogish Sabharwal, Vaibhav Saxena, Sathish S. Vadhiyar
ROOM:355-EF
ABSTRACT:
Accurate and timely prediction of weather phenomena, such as hurricanes and flash floods, require high-fidelity compute intensive simulations of multiple finer regions of interest within a coarse simulation domain. Current weather applications execute these nested simulations sequentially using all the available processors, which is sub-optimal due to their sublinear scalability. In this work, we present a strategy for parallel execution of multiple nested domain simulations based on partitioning the 2-D processor grid into disjoint rectangular regions associated with each domain. We propose a novel combination of performance prediction, processor allocation methods and topology-aware mapping of the regions on torus interconnects. Experiments on IBM Blue Gene systems using WRF show that the proposed strategies result in performance improvement of up to 33% with topology-oblivious mapping and up to additional 7% with topology-aware mapping over the default sequential strategy.
Chair/Author Details:
Amik St-Cyr (Chair) - Royal Dutch Shell
Preeti Malakar - Indian Institute of Science
Thomas George - IBM India
Sameer Kumar - IBM T.J. Watson Research Center
Rashmi Mittal - IBM India
Vijay Natarajan - Indian Institute of Science
Yogish Sabharwal - IBM India
Vaibhav Saxena - IBM India
Sathish S. Vadhiyar - Indian Institute of Science
Click here to download .ics calendar file
Click here to download .vcs calendar file
Click here to add event to your Google Calendar
A Divide and Conquer Strategy for Scaling Weather Simulations with Multiple Regions of Interest
SESSION: Weather and Seismic Simulations
EVENT TYPE: , Best Student Paper Finalists
TIME: 3:30PM - 4:00PM
SESSION CHAIR: Amik St-Cyr
AUTHOR(S):Preeti Malakar, Thomas George, Sameer Kumar, Rashmi Mittal, Vijay Natarajan, Yogish Sabharwal, Vaibhav Saxena, Sathish S. Vadhiyar
ROOM:355-EF
ABSTRACT:
Accurate and timely prediction of weather phenomena, such as hurricanes and flash floods, require high-fidelity compute intensive simulations of multiple finer regions of interest within a coarse simulation domain. Current weather applications execute these nested simulations sequentially using all the available processors, which is sub-optimal due to their sublinear scalability. In this work, we present a strategy for parallel execution of multiple nested domain simulations based on partitioning the 2-D processor grid into disjoint rectangular regions associated with each domain. We propose a novel combination of performance prediction, processor allocation methods and topology-aware mapping of the regions on torus interconnects. Experiments on IBM Blue Gene systems using WRF show that the proposed strategies result in performance improvement of up to 33% with topology-oblivious mapping and up to additional 7% with topology-aware mapping over the default sequential strategy.
Chair/Author Details:
Amik St-Cyr (Chair) - Royal Dutch Shell
Preeti Malakar - Indian Institute of Science
Thomas George - IBM India
Sameer Kumar - IBM T.J. Watson Research Center
Rashmi Mittal - IBM India
Vijay Natarajan - Indian Institute of Science
Yogish Sabharwal - IBM India
Vaibhav Saxena - IBM India
Sathish S. Vadhiyar - Indian Institute of Science
Click here to download .ics calendar file