ExaFMM 1
Fast-multipole Method for exascale systems
|
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 int numBodies = 10000; 00029 int numTarget = 100; 00030 IMAGES = 0; 00031 THETA = 1 / sqrtf(4); 00032 Bodies bodies, jbodies; 00033 Cells cells, jcells; 00034 SerialFMM<Laplace> FMM; 00035 FMM.initialize(); 00036 00037 for( int it=0; it!=25; ++it ) { 00038 numBodies = int(pow(10,(it+24)/8.0)); 00039 std::cout << "N : " << numBodies << std::endl; 00040 bodies.resize(numBodies); 00041 FMM.random(bodies,1,1); 00042 FMM.startTimer("FMM "); 00043 FMM.setDomain(bodies); 00044 cells.clear(); 00045 #ifdef TOPDOWN 00046 FMM.topdown(bodies,cells); 00047 #else 00048 FMM.bottomup(bodies,cells); 00049 #endif 00050 jcells = cells; 00051 FMM.downward(cells,jcells); 00052 FMM.stopTimer("FMM ",true); 00053 FMM.eraseTimer("FMM "); 00054 00055 FMM.startTimer("Direct sum "); 00056 FMM.buffer = bodies; 00057 #if 1 00058 FMM.initTarget(FMM.buffer); 00059 if( IMAGES != 0 ) { 00060 jbodies = FMM.periodicBodies(FMM.buffer); 00061 } else { 00062 jbodies = FMM.buffer; 00063 } 00064 FMM.buffer.resize(numTarget); 00065 FMM.evalP2P(FMM.buffer,jbodies); 00066 FMM.writeTarget(FMM.buffer); 00067 #else 00068 FMM.readTarget(FMM.buffer); 00069 #endif 00070 FMM.stopTimer("Direct sum ",true); 00071 FMM.eraseTimer("Direct sum "); 00072 FMM.writeTime(); 00073 FMM.resetTimer(); 00074 00075 real diff1 = 0, norm1 = 0, diff2 = 0, norm2 = 0; 00076 bodies.resize(numTarget); 00077 FMM.evalError(bodies,FMM.buffer,diff1,norm1,diff2,norm2); 00078 FMM.printError(diff1,norm1,diff2,norm2); 00079 } 00080 FMM.finalize(); 00081 }