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 "serialfmm.h" 00023 #ifdef VTK 00024 #include "vtk.h" 00025 #endif 00026 00027 int main() { 00028 const int numBodies = 10000; 00029 const int numTarget = 100; 00030 IMAGES = 0; 00031 THETA = 1 / sqrtf(4); 00032 Bodies bodies(numBodies); 00033 Bodies bodies2; 00034 Bodies jbodies; 00035 Cells cells, jcells; 00036 SerialFMM<Laplace> FMM; 00037 FMM.initialize(); 00038 FMM.printNow = true; 00039 00040 FMM.startTimer("Set bodies "); 00041 FMM.random(bodies,1,1); 00042 bodies2 = bodies; 00043 FMM.stopTimer("Set bodies ",FMM.printNow); 00044 00045 if( IMAGES != 0 ) { 00046 FMM.startTimer("Set periodic "); 00047 jbodies = FMM.periodicBodies(bodies2); 00048 FMM.stopTimer("Set periodic ",FMM.printNow); 00049 } else { 00050 jbodies = bodies2; 00051 } 00052 00053 FMM.startTimer("Direct sum "); 00054 bodies2.resize(numTarget); 00055 FMM.evalP2P(bodies2,jbodies); 00056 FMM.stopTimer("Direct sum ",FMM.printNow); 00057 FMM.eraseTimer("Direct sum "); 00058 00059 FMM.startTimer("Set domain "); 00060 FMM.initTarget(bodies); 00061 FMM.setDomain(bodies); 00062 FMM.stopTimer("Set domain ",FMM.printNow); 00063 00064 #ifdef TOPDOWN 00065 FMM.topdown(bodies,cells); 00066 #else 00067 FMM.bottomup(bodies,cells); 00068 #endif 00069 00070 jcells = cells; 00071 FMM.startTimer("Downward "); 00072 FMM.downward(cells,jcells); 00073 FMM.stopTimer("Downward ",FMM.printNow); 00074 00075 FMM.startTimer("Unsort bodies"); 00076 std::sort(bodies.begin(),bodies.end()); 00077 FMM.stopTimer("Unsort bodies",FMM.printNow); 00078 FMM.writeTime(); 00079 FMM.writeTime(); 00080 00081 real diff1 = 0, norm1 = 0, diff2 = 0, norm2 = 0; 00082 bodies.resize(numTarget); 00083 FMM.evalError(bodies,bodies2,diff1,norm1,diff2,norm2); 00084 FMM.printError(diff1,norm1,diff2,norm2); 00085 FMM.finalize(); 00086 }