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SCHEDULE: NOV 16-21, 2014
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.
Large-Scale Granular Simulations Using Dynamic Load Balance on a GPU Supercomputer
SESSION: Poster Reception
EVENT TYPE: Posters
TIME: 5:15PM - 7:00PM
AUTHOR(S):Satori Tsuzuki, Takayuki Aoki
ROOM:New Orleans Theater Lobby
ABSTRACT:
Billion particles are required to describe granular phenomena by using particle simulations based on Distinct Element Method (DEM), which computes contact interactions among particles. Multiple GPUs on TSUBAME 2.5 in Tokyo Tech are used to boost the simulation and are assigned to each domain decomposed in space. Since the particle distribution changes in time and space, dynamic domain decomposition is required for large-scale DEM particle simulations. We have introduced a two-dimensional slice-grid method to keep the same number of particles for each domain. Due to particles across the sub-domain boundary, the memory used for living particles is fragmented and the optimum frequency of de-fragmentation on CPU is studied by taking account for data transfer cost through the PCI-Express bus.
Our dynamic load balance works well with good scalability in proportion to the GPU number. We demonstrate several DEM simulations running on TSUBAME 2.5.
Chair/Author Details:
Satori Tsuzuki - Tokyo Institute of Technology
Takayuki Aoki - Tokyo Institute of Technology
Click here to download .ics calendar file
