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Xgc1: Performance on the 8-core and 12-core Cray Xt5 Systems at Ornl

Publication Type
Conference Paper
Publication Date
Conference Name
CUG 2010
Conference Location
Edinburgh, United Kingdom
Conference Sponsor
Cray User Group
Conference Date

The XGC1 code is used to model multiscale tokamak plasma turbulence dynamics in realistic diverted magnetic field geometry. In June 2009, XGC1 demonstrated nearly linear weak and strong scaling out to 150,000 cores on a Cray XT5 with 8-core nodes when solving problems of relevance to running experiments on the ITER tokamak. Here we compare performance, and discuss further performance optimizations, when running XGC1 on an XT5 with 12-core nodes on up to 224,000 cores.