ExaFMM 1
Fast-multipole Method for exascale systems
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00001 /* 00002 Copyright (C) 2011 by Rio Yokota, Simon Layton, Lorena Barba 00003 00004 Permission is hereby granted, free of charge, to any person obtaining a copy 00005 of this software and associated documentation files (the "Software"), to deal 00006 in the Software without restriction, including without limitation the rights 00007 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 00008 copies of the Software, and to permit persons to whom the Software is 00009 furnished to do so, subject to the following conditions: 00010 00011 The above copyright notice and this permission notice shall be included in 00012 all copies or substantial portions of the Software. 00013 00014 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 00015 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00016 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 00017 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 00018 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 00019 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 00020 THE SOFTWARE. 00021 */ 00022 #include "partition.h" 00023 #ifdef VTK 00024 #include "vtk.h" 00025 #endif 00026 00027 int main() { 00028 const int numBodies = 1000000; 00029 IMAGES = 0; 00030 THETA = 1 / sqrtf(4); 00031 Bodies bodies(numBodies); 00032 Partition<Laplace> FMM; 00033 FMM.initialize(); 00034 if( MPIRANK == 0 ) FMM.printNow = true; 00035 00036 FMM.startTimer("Set bodies "); 00037 FMM.random(bodies,MPIRANK+1); 00038 FMM.stopTimer("Set bodies ",FMM.printNow); 00039 00040 FMM.startTimer("Set domain "); 00041 FMM.setGlobDomain(bodies); 00042 FMM.stopTimer("Set domain ",FMM.printNow); 00043 00044 FMM.setIndex(bodies); 00045 FMM.binBodies(bodies,0); 00046 00047 FMM.buffer.resize(bodies.size()); 00048 FMM.sortBodies(bodies,FMM.buffer); 00049 00050 FMM.startTimer("Nth element "); 00051 bigint nthGlobal = numBodies * MPISIZE / 3; 00052 bigint iSplit = FMM.nth_element(bodies,nthGlobal); 00053 int nthLocal = FMM.splitBodies(bodies,iSplit); 00054 FMM.stopTimer("Nth element ",FMM.printNow); 00055 for( B_iter B=bodies.begin(); B!=bodies.end(); ++B ) { 00056 B->ICELL = B-bodies.begin() > nthLocal; 00057 } 00058 00059 #ifdef VTK 00060 if( MPIRANK == 0 ) { 00061 int Ncell = 0; 00062 vtkPlot vtk; 00063 vtk.setDomain(FMM.getR0(),FMM.getX0()); 00064 vtk.setGroupOfPoints(bodies,Ncell); 00065 vtk.plot(Ncell); 00066 } 00067 #endif 00068 FMM.finalize(); 00069 }