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Proceedings of the 2003 ACM/IEEE conference on Supercomputing
A 14.6 billion degrees of freedom, 5 teraflops, 2.5 terabyte earthquake simulation on the Earth Simulator
Phoenix, Arizona
November 15November 21
ISBN: 1581136951
ASCII Text  x  
Dimitri Komatitsch, Seiji Tsuboi, Chen Ji, Jeroen Tromp, "A 14.6 billion degrees of freedom, 5 teraflops, 2.5 terabyte earthquake simulation on the Earth Simulator," SC Conference, pp. 4, Proceedings of the 2003 ACM/IEEE conference on Supercomputing, 2003.  
BibTex  x  
@article{ 10.1109/SC.2003.10023, author = {Dimitri Komatitsch and Seiji Tsuboi and Chen Ji and Jeroen Tromp}, title = {A 14.6 billion degrees of freedom, 5 teraflops, 2.5 terabyte earthquake simulation on the Earth Simulator}, journal ={SC Conference}, volume = {0}, year = {2003}, isbn = {1581136951}, pages = {4}, doi = {http://doi.ieeecomputersociety.org/10.1109/SC.2003.10023}, publisher = {IEEE Computer Society}, address = {Los Alamitos, CA, USA}, }  
RefWorks Procite/RefMan/Endnote  x  
TY  CONF JO  SC Conference TI  A 14.6 billion degrees of freedom, 5 teraflops, 2.5 terabyte earthquake simulation on the Earth Simulator SN  1581136951 SP EP A1  Dimitri Komatitsch, A1  Seiji Tsuboi, A1  Chen Ji, A1  Jeroen Tromp, PY  2003 VL  0 JA  SC Conference ER   
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/SC.2003.10023
We use 1944 processors of the Earth Simulator to model seismic wave propagation resulting from large earthquakes. Simulations are conducted based upon the spectralelement method, a highdegree finiteelement technique with an exactly diagonal mass matrix. We use a very large mesh with 5.5 billion grid points (14.6 billion degrees of freedom). We include the full complexity of the Earth, i.e., a threedimensional wavespeed and density structure, a 3D crustal model, ellipticity as well as topography and bathymetry. A total of 2.5 terabytes of memory is needed. Our implementation is purely based upon MPI, with loop vectorization on each processor. We obtain an excellent vectorization ratio of 99.3%, and we reach a performance of 5 teraflops (30% of the peak performance) on 38% of the machine. The very high resolution of the mesh allows us to perform fully threedimensional calculations at seismic periods as low as 5 seconds.
Citation:
Dimitri Komatitsch, Seiji Tsuboi, Chen Ji, Jeroen Tromp, "A 14.6 billion degrees of freedom, 5 teraflops, 2.5 terabyte earthquake simulation on the Earth Simulator," sc, pp.4, Proceedings of the 2003 ACM/IEEE conference on Supercomputing, 2003
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