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 "mympi.h" 00023 #include "evaluator.h" 00024 00025 int main() { 00026 char hostname[256]; 00027 const int numBodies = 1000; 00028 IMAGES = 0; 00029 THETA = 1 / sqrtf(4); 00030 Bodies bodies(numBodies); 00031 Evaluator<Laplace> FMM; 00032 MyMPI M; 00033 FMM.initialize(); 00034 FMM.preCalculation(); 00035 gethostname(hostname,sizeof(hostname)); 00036 if( MPIRANK == 0 ) FMM.printNow = true; 00037 00038 FMM.startTimer("Set bodies "); 00039 FMM.sphere(bodies); 00040 FMM.stopTimer("Set bodies ",FMM.printNow); 00041 00042 FMM.startTimer("Set domain "); 00043 FMM.setDomain(bodies); 00044 FMM.stopTimer("Set domain ",FMM.printNow); 00045 00046 FMM.startTimer("Direct GPU "); 00047 FMM.evalP2P(bodies,bodies); 00048 FMM.stopTimer("Direct GPU ",FMM.printNow); 00049 00050 FMM.startTimer("Direct CPU "); 00051 bool onCPU = true; 00052 Bodies bodies2 = bodies; 00053 FMM.initTarget(bodies2); 00054 FMM.evalP2P(bodies2,bodies2,onCPU); 00055 FMM.stopTimer("Direct CPU ",FMM.printNow); 00056 00057 real diff1 = 0, norm1 = 0, diff2 = 0, norm2 = 0; 00058 FMM.evalError(bodies,bodies2,diff1,norm1,diff2,norm2); 00059 00060 for( int irank=0; irank!=MPISIZE; ++irank ) { 00061 MPI_Barrier(MPI_COMM_WORLD); 00062 if( MPIRANK == irank ) { 00063 std::cout << hostname << " @ rank : " << MPIRANK << " / " << MPISIZE; 00064 std::cout << " @ device : " << DEVICE << " / " << GPUS << std::endl; 00065 std::cout << "Error : " << std::sqrt(diff1/norm1) << std::endl; 00066 } 00067 usleep(100); 00068 } 00069 FMM.postCalculation(); 00070 FMM.finalize(); 00071 }