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root/group/trunk/OOPSE/libmdtools/DumpWriter.cpp
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Comparing:
branches/mmeineke/OOPSE/libmdtools/DumpWriter.cpp (file contents), Revision 377 by mmeineke, Fri Mar 21 17:42:12 2003 UTC vs.
trunk/OOPSE/libmdtools/DumpWriter.cpp (file contents), Revision 1000 by tim, Fri Jan 30 21:47:22 2004 UTC

# Line 1 | Line 1
1 < #include <cstring>
1 > #define _FILE_OFFSET_BITS 64
2 >
3 > #include <string.h>
4   #include <iostream>
5   #include <fstream>
6 + #include <algorithm>
7 + #include <utility>
8  
9   #ifdef IS_MPI
10   #include <mpi.h>
11   #include "mpiSimulation.hpp"
12 < #define TAKE_THIS_TAG 0
12 >
13 > namespace dWrite{
14 >  void DieDieDie( void );
15 > }
16 >
17 > using namespace dWrite;
18   #endif //is_mpi
19  
20   #include "ReadWrite.hpp"
21   #include "simError.h"
22  
14 –
15 –
16 –
17 –
23   DumpWriter::DumpWriter( SimInfo* the_entry_plug ){
24  
25    entry_plug = the_entry_plug;
# Line 22 | Line 27 | DumpWriter::DumpWriter( SimInfo* the_entry_plug ){
27   #ifdef IS_MPI
28    if(worldRank == 0 ){
29   #endif // is_mpi
30 <    
31 <
32 <    
33 <    strcpy( outName, entry_plug->sampleName );
34 <    
30 <    outFile.open(outName, ios::out | ios::trunc );
31 <    
32 <    if( !outFile ){
33 <      
30 >
31 >    dumpFile.open(entry_plug->sampleName, ios::out | ios::trunc );
32 >
33 >    if( !dumpFile ){
34 >
35        sprintf( painCave.errMsg,
36                 "Could not open \"%s\" for dump output.\n",
37 <               outName);
37 >               entry_plug->sampleName);
38        painCave.isFatal = 1;
39        simError();
40      }
40 –  
41 –    //outFile.setf( ios::scientific );
41  
42   #ifdef IS_MPI
43    }
44  
45 +  //sort the local atoms by global index
46 +  sortByGlobalIndex();
47 +  
48    sprintf( checkPointMsg,
49             "Sucessfully opened output file for dumping.\n");
50    MPIcheckPoint();
# Line 55 | Line 57 | DumpWriter::~DumpWriter( ){
57    if(worldRank == 0 ){
58   #endif // is_mpi
59  
60 <    outFile.close();
60 >    dumpFile.close();
61  
62   #ifdef IS_MPI
63    }
64   #endif // is_mpi
65   }
66  
67 < void DumpWriter::writeDump( double currentTime ){
67 > #ifdef IS_MPI
68 >
69 > /**
70 > * A hook function to load balancing
71 > */
72 >
73 > void DumpWriter::update(){
74 >  sortByGlobalIndex();          
75 > }
76    
77 <  const int BUFFERSIZE = 2000;
78 <  char tempBuffer[BUFFERSIZE];
79 <  char writeLine[BUFFERSIZE];
77 > /**
78 > * Auxiliary sorting function
79 > */
80 >
81 > bool indexSortingCriterion(const pair<int, int>& p1, const pair<int, int>& p2){
82 >  return p1.second < p2.second;
83 > }
84  
85 <  int i;
86 <  double q[4];
87 <  DirectionalAtom* dAtom;
88 <  int nAtoms = entry_plug->n_atoms;
85 > /**
86 > * Sorting the local index by global index
87 > */
88 >
89 > void DumpWriter::sortByGlobalIndex(){
90    Atom** atoms = entry_plug->atoms;
91 <    
91 >  
92 >  indexArray.clear();
93 >  
94 >  for(int i = 0; i < mpiSim->getMyNlocal();i++)
95 >    indexArray.push_back(make_pair(i, atoms[i]->getGlobalIndex()));
96 >  
97 >  sort(indexArray.begin(), indexArray.end(), indexSortingCriterion);    
98 > }
99  
100 < #ifndef IS_MPI
79 <    
80 <  outFile << nAtoms << "\n";
81 <    
82 <  outFile << currentTime << "\t"
83 <          << entry_plug->box_x << "\t"
84 <          << entry_plug->box_y << "\t"
85 <          << entry_plug->box_z << "\n";
86 <    
87 <  for( i=0; i<nAtoms; i++ ){
88 <      
100 > #endif
101  
102 <    sprintf( tempBuffer,
91 <             "%s\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t",
92 <             atoms[i]->getType(),
93 <             atoms[i]->getX(),
94 <             atoms[i]->getY(),
95 <             atoms[i]->getZ(),
96 <             atoms[i]->get_vx(),
97 <             atoms[i]->get_vy(),
98 <             atoms[i]->get_vz());
99 <    strcpy( writeLine, tempBuffer );
102 > void DumpWriter::writeDump(double currentTime){
103  
104 <    if( atoms[i]->isDirectional() ){
105 <        
106 <      dAtom = (DirectionalAtom *)atoms[i];
107 <      dAtom->getQ( q );
108 <        
109 <      sprintf( tempBuffer,
110 <               "%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\n",
111 <               q[0],
112 <               q[1],
113 <               q[2],
114 <               q[3],
115 <               dAtom->getJx(),
116 <               dAtom->getJy(),
114 <               dAtom->getJz());
115 <      strcat( writeLine, tempBuffer );
104 >  ofstream finalOut;
105 >  vector<ofstream*> fileStreams;
106 >
107 > #ifdef IS_MPI
108 >  if(worldRank == 0 ){
109 > #endif    
110 >    finalOut.open( entry_plug->finalName, ios::out | ios::trunc );
111 >    if( !finalOut ){
112 >      sprintf( painCave.errMsg,
113 >               "Could not open \"%s\" for final dump output.\n",
114 >               entry_plug->finalName );
115 >      painCave.isFatal = 1;
116 >      simError();
117      }
118 <    else
118 <      strcat( writeLine, "0.0\t0.0\t0.0\t0.0\t0.0\t0.0\t0.0\n" );
119 <      
120 <    outFile << writeLine;
118 > #ifdef IS_MPI
119    }
120 <  outFile.flush();
120 > #endif // is_mpi
121  
122 < #else // is_mpi
122 >  fileStreams.push_back(&finalOut);
123 >  fileStreams.push_back(&dumpFile);
124  
125 <  int masterIndex;
127 <  int nodeAtomsStart;
128 <  int nodeAtomsEnd;
129 <  int mpiErr;
130 <  int sendError;
131 <  int procIndex;
132 <    
133 <  MPI_Status istatus[MPI_STATUS_SIZE];
125 >  writeFrame(fileStreams, currentTime);
126  
127 <    
128 <  // write out header and node 0's coordinates
127 > #ifdef IS_MPI
128 >  finalOut.close();
129 > #endif
130 >        
131 > }
132  
133 <  if( worldRank == 0 ){
139 <    outFile << mpiSim->getTotAtoms() << "\n";
140 <      
141 <    outFile << currentTime << "\t"
142 <            << entry_plug->box_x << "\t"
143 <            << entry_plug->box_y << "\t"
144 <            << entry_plug->box_z << "\n";
133 > void DumpWriter::writeFinal(double currentTime){
134  
135 <    masterIndex = 0;
136 <    for( i=0; i<nAtoms; i++ ){
148 <      
149 <      sprintf( tempBuffer,
150 <               "%s\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t",
151 <               atoms[i]->getType(),
152 <               atoms[i]->getX(),
153 <               atoms[i]->getY(),
154 <               atoms[i]->getZ(),
155 <               atoms[i]->get_vx(),
156 <               atoms[i]->get_vy(),
157 <               atoms[i]->get_vz());
158 <      strcpy( writeLine, tempBuffer );
159 <        
160 <      if( atoms[i]->isDirectional() ){
161 <          
162 <        dAtom = (DirectionalAtom *)atoms[i];
163 <        dAtom->getQ( q );
164 <          
165 <        sprintf( tempBuffer,
166 <                 "%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\n",
167 <                 q[0],
168 <                 q[1],
169 <                 q[2],
170 <                 q[3],
171 <                 dAtom->getJx(),
172 <                 dAtom->getJy(),
173 <                 dAtom->getJz());
174 <        strcat( writeLine, tempBuffer );
175 <      }
176 <      else
177 <        strcat( writeLine, "0.0\t0.0\t0.0\t0.0\t0.0\t0.0\t0.0\n" );
178 <        
179 <      outFile << writeLine;
180 <      masterIndex++;
181 <    }
182 <    outFile.flush();
183 <  }
135 >  ofstream finalOut;
136 >  vector<ofstream*> fileStreams;
137  
138 <  sprintf( checkPointMsg,
139 <           "Sucessfully wrote node 0's dump configuration.\n");
140 <  MPIcheckPoint();
188 <    
189 <  for (procIndex = 1; procIndex < mpiSim->getNumberProcessors();
190 <       procIndex++){
138 > #ifdef IS_MPI
139 >  if(worldRank == 0 ){
140 > #endif // is_mpi
141  
142 <    if( worldRank == 0 ){
193 <      
194 <      mpiErr = MPI_Recv(&nodeAtomsStart,1,MPI_INT,procIndex,
195 <                        TAKE_THIS_TAG,MPI_COMM_WORLD,istatus);
196 <      
197 <      mpiErr = MPI_Recv(&nodeAtomsEnd,1,MPI_INT,procIndex,
198 <                        TAKE_THIS_TAG,MPI_COMM_WORLD, istatus);
199 <      
200 <      // Make sure where node 0 is writing to, matches where the
201 <      // receiving node expects it to be.
202 <      
203 <      if (masterIndex != nodeAtomsStart){
204 <        sendError = 1;
205 <        mpiErr = MPI_Send(&sendError,1,MPI_INT,procIndex,TAKE_THIS_TAG,
206 <                          MPI_COMM_WORLD);
207 <        sprintf(painCave.errMsg,
208 <                "DumpWriter error: atoms start index (%d) for "
209 <                "node %d not equal to master index (%d)",
210 <                nodeAtomsStart,procIndex,masterIndex );
211 <        painCave.isFatal = 1;
212 <        simError();
213 <      }
214 <      
215 <      sendError = 0;
216 <      mpiErr = MPI_Send(&sendError,1,MPI_INT,procIndex,TAKE_THIS_TAG,
217 <                        MPI_COMM_WORLD);
218 <      
219 <      // recieve the nodes writeLines
220 <      
221 <      for ( i = nodeAtomsStart; i <= nodeAtomsEnd; i++){
222 <        
223 <        mpiErr = MPI_Recv(writeLine,BUFFERSIZE,MPI_CHAR,procIndex,
224 <                          TAKE_THIS_TAG,MPI_COMM_WORLD,istatus );
225 <        
226 <        outFile << writeLine;
227 <        masterIndex++;
228 <      }
229 <    }
142 >    finalOut.open( entry_plug->finalName, ios::out | ios::trunc );
143  
144 <    else if( worldRank == procIndex ){
145 <
146 <      nodeAtomsStart = mpiSim->getMyAtomStart();
147 <      nodeAtomsEnd = mpiSim->getMyAtomEnd();
148 <
149 <      mpiErr = MPI_Send(&nodeAtomsStart,1,MPI_INT,0,TAKE_THIS_TAG,
237 <                        MPI_COMM_WORLD);
238 <      mpiErr = MPI_Send(&nodeAtomsEnd,1,MPI_INT,0,TAKE_THIS_TAG,
239 <                        MPI_COMM_WORLD);
240 <        
241 <      sendError = -1;
242 <      mpiErr = MPI_Recv(&sendError,1,MPI_INT,0,TAKE_THIS_TAG,
243 <                        MPI_COMM_WORLD, istatus);
244 <
245 <      if (sendError) MPIcheckPoint();
246 <
247 <      // send current node's configuration line by line.
248 <
249 <      for( i=0; i<nAtoms; i++ ){
250 <
251 <        sprintf( tempBuffer,
252 <                 "%s\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t",
253 <                 atoms[i]->getType(),
254 <                 atoms[i]->getX(),
255 <                 atoms[i]->getY(),
256 <                 atoms[i]->getZ(),
257 <                 atoms[i]->get_vx(),
258 <                 atoms[i]->get_vy(),
259 <                 atoms[i]->get_vz()); // check here.
260 <        strcpy( writeLine, tempBuffer );
261 <          
262 <        if( atoms[i]->isDirectional() ){
263 <            
264 <          dAtom = (DirectionalAtom *)atoms[i];
265 <          dAtom->getQ( q );
266 <            
267 <          sprintf( tempBuffer,
268 <                   "%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\n",
269 <                   q[0],
270 <                   q[1],
271 <                   q[2],
272 <                   q[3],
273 <                   dAtom->getJx(),
274 <                   dAtom->getJy(),
275 <                   dAtom->getJz());
276 <          strcat( writeLine, tempBuffer );
277 <        }
278 <        else
279 <          strcat( writeLine, "0.0\t0.0\t0.0\t0.0\t0.0\t0.0\t0.0\n" );
280 <          
281 <        mpiErr = MPI_Send(writeLine,BUFFERSIZE,MPI_CHAR,0,TAKE_THIS_TAG,
282 <                          MPI_COMM_WORLD);
283 <      }
144 >    if( !finalOut ){
145 >      sprintf( painCave.errMsg,
146 >               "Could not open \"%s\" for final dump output.\n",
147 >               entry_plug->finalName );
148 >      painCave.isFatal = 1;
149 >      simError();
150      }
151 <      
152 <    sprintf(checkPointMsg,"Node %d sent dump configuration.",
287 <            procIndex);
288 <    MPIcheckPoint();
151 >
152 > #ifdef IS_MPI
153    }
290 –    
154   #endif // is_mpi
155 +  
156 +  fileStreams.push_back(&finalOut);  
157 +  writeFrame(fileStreams, currentTime);
158 +
159 + #ifdef IS_MPI
160 +  finalOut.close();
161 + #endif
162 +  
163   }
164  
165 + void DumpWriter::writeFrame( vector<ofstream*>& outFile, double currentTime ){
166  
167 +  const int BUFFERSIZE = 2000;
168 +  const int MINIBUFFERSIZE = 100;
169  
170 < void DumpWriter::writeFinal(){
170 >  char tempBuffer[BUFFERSIZE];  
171 >  char writeLine[BUFFERSIZE];
172  
173 +  int i, k;
174  
175 <  const int BUFFERSIZE = 2000;
300 <  char tempBuffer[500];
301 <  char writeLine[BUFFERSIZE];
175 > #ifdef IS_MPI
176    
177 <  char finalName[500];
177 >  /*********************************************************************
178 >   * Documentation?  You want DOCUMENTATION?
179 >   *
180 >   * Why all the potatoes below?  
181 >   *
182 >   * To make a long story short, the original version of DumpWriter
183 >   * worked in the most inefficient way possible.  Node 0 would
184 >   * poke each of the node for an individual atom's formatted data
185 >   * as node 0 worked its way down the global index. This was particularly
186 >   * inefficient since the method blocked all processors at every atom
187 >   * (and did it twice!).
188 >   *
189 >   * An intermediate version of DumpWriter could be described from Node
190 >   * zero's perspective as follows:
191 >   *
192 >   *  1) Have 100 of your friends stand in a circle.
193 >   *  2) When you say go, have all of them start tossing potatoes at
194 >   *     you (one at a time).
195 >   *  3) Catch the potatoes.
196 >   *
197 >   * It was an improvement, but MPI has buffers and caches that could
198 >   * best be described in this analogy as "potato nets", so there's no
199 >   * need to block the processors atom-by-atom.
200 >   *
201 >   * This new and improved DumpWriter works in an even more efficient
202 >   * way:
203 >   *
204 >   *  1) Have 100 of your friend stand in a circle.
205 >   *  2) When you say go, have them start tossing 5-pound bags of
206 >   *     potatoes at you.
207 >   *  3) Once you've caught a friend's bag of potatoes,
208 >   *     toss them a spud to let them know they can toss another bag.
209 >   *
210 >   * How's THAT for documentation?
211 >   *
212 >   *********************************************************************/
213  
214 <  int i;
214 >  int *potatoes;
215 >  int myPotato;
216 >
217 >  int nProc;
218 >  int j, which_node, done, which_atom, local_index, currentIndex;
219 >  double atomData6[6];
220 >  double atomData13[13];
221 >  int isDirectional;
222 >  char* atomTypeString;
223 >  char MPIatomTypeString[MINIBUFFERSIZE];
224 >
225 > #else //is_mpi
226 >  int nAtoms = entry_plug->n_atoms;
227 > #endif //is_mpi
228 >
229    double q[4];
230    DirectionalAtom* dAtom;
308 –  int nAtoms = entry_plug->n_atoms;
231    Atom** atoms = entry_plug->atoms;
232 +  double pos[3], vel[3];
233 +
234 + #ifndef IS_MPI
235    
236 <  ofstream finalOut;
237 <  
238 < #ifdef IS_MPI
239 <  if(worldRank == 0 ){
240 < #endif // is_mpi
241 <    
242 <    strcpy( finalName, entry_plug->finalName );
243 <    
244 <    finalOut.open( finalName, ios::out | ios::trunc );
245 <    if( !finalOut ){
246 <      sprintf( painCave.errMsg,
247 <               "Could not open \"%s\" for final dump output.\n",
248 <               finalName );
249 <      painCave.isFatal = 1;
250 <      simError();
251 <    }
252 <    
253 <    // finalOut.setf( ios::scientific );
329 <    
330 < #ifdef IS_MPI
236 >  for(k = 0; k < outFile.size(); k++){
237 >    *outFile[k] << nAtoms << "\n";
238 >
239 >    *outFile[k] << currentTime << ";\t"
240 >               << entry_plug->Hmat[0][0] << "\t"
241 >                     << entry_plug->Hmat[1][0] << "\t"
242 >                     << entry_plug->Hmat[2][0] << ";\t"
243 >              
244 >               << entry_plug->Hmat[0][1] << "\t"
245 >                     << entry_plug->Hmat[1][1] << "\t"
246 >                     << entry_plug->Hmat[2][1] << ";\t"
247 >
248 >                     << entry_plug->Hmat[0][2] << "\t"
249 >                     << entry_plug->Hmat[1][2] << "\t"
250 >                     << entry_plug->Hmat[2][2] << ";";
251 >
252 >    //write out additional parameters, such as chi and eta
253 >    *outFile[k] << entry_plug->the_integrator->getAdditionalParameters() << endl;
254    }
255    
256 <  sprintf(checkPointMsg,"Opened file for final configuration\n");
334 <  MPIcheckPoint();  
335 <  
336 < #endif //is_mpi
256 >  for( i=0; i<nAtoms; i++ ){
257  
258 <    
258 >    atoms[i]->getPos(pos);
259 >    atoms[i]->getVel(vel);
260  
340 – #ifndef IS_MPI
341 –    
342 –  finalOut << nAtoms << "\n";
343 –    
344 –  finalOut << entry_plug->box_x << "\t"
345 –           << entry_plug->box_y << "\t"
346 –           << entry_plug->box_z << "\n";
347 –    
348 –  for( i=0; i<nAtoms; i++ ){
349 –      
261      sprintf( tempBuffer,
262               "%s\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t",
263               atoms[i]->getType(),
264 <             atoms[i]->getX(),
265 <             atoms[i]->getY(),
266 <             atoms[i]->getZ(),
267 <             atoms[i]->get_vx(),
268 <             atoms[i]->get_vy(),
269 <             atoms[i]->get_vz());
264 >             pos[0],
265 >             pos[1],
266 >             pos[2],
267 >             vel[0],
268 >             vel[1],
269 >             vel[2]);
270      strcpy( writeLine, tempBuffer );
271  
272      if( atoms[i]->isDirectional() ){
273 <        
273 >
274        dAtom = (DirectionalAtom *)atoms[i];
275        dAtom->getQ( q );
276 <        
276 >
277        sprintf( tempBuffer,
278                 "%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\n",
279                 q[0],
# Line 376 | Line 287 | void DumpWriter::writeFinal(){
287      }
288      else
289        strcat( writeLine, "0.0\t0.0\t0.0\t0.0\t0.0\t0.0\t0.0\n" );
290 <      
291 <    finalOut << writeLine;
290 >
291 >    for(k = 0; k < outFile.size(); k++)
292 >      *outFile[k] << writeLine;
293    }
382 –  finalOut.flush();
294  
295   #else // is_mpi
296  
297 <  int masterIndex;
298 <  int nodeAtomsStart;
299 <  int nodeAtomsEnd;
300 <  int mpiErr;
301 <  int sendError;
302 <  int procIndex;
303 <    
304 <  MPI_Status istatus[MPI_STATUS_SIZE];
297 >  /* code to find maximum tag value */
298 >  
299 >  int *tagub, flag, MAXTAG;
300 >  MPI_Attr_get(MPI_COMM_WORLD, MPI_TAG_UB, &tagub, &flag);
301 >  if (flag) {
302 >    MAXTAG = *tagub;
303 >  } else {
304 >    MAXTAG = 32767;
305 >  }  
306  
307 <    
307 >  int haveError;
308 >
309 >  MPI_Status istatus;
310 >  int *AtomToProcMap = mpiSim->getAtomToProcMap();
311 >
312    // write out header and node 0's coordinates
313  
314    if( worldRank == 0 ){
315 <    finalOut << mpiSim->getTotAtoms() << "\n";
316 <      
317 <    finalOut << entry_plug->box_x << "\t"
318 <             << entry_plug->box_y << "\t"
319 <             << entry_plug->box_z << "\n";
315 >
316 >    // Node 0 needs a list of the magic potatoes for each processor;
317 >
318 >    nProc = mpiSim->getNumberProcessors();
319 >    potatoes = new int[nProc];
320 >
321 >    //write out the comment lines
322 >    for (i = 0; i < nProc; i++)
323 >      potatoes[i] = 0;
324      
325 <    masterIndex = 0;
326 <    
327 <    for( i=0; i<nAtoms; i++ ){
325 >      for(k = 0; k < outFile.size(); k++){
326 >        *outFile[k] << mpiSim->getTotAtoms() << "\n";
327 >
328 >        *outFile[k] << currentTime << ";\t"
329 >                         << entry_plug->Hmat[0][0] << "\t"
330 >                         << entry_plug->Hmat[1][0] << "\t"
331 >                         << entry_plug->Hmat[2][0] << ";\t"
332 >
333 >                         << entry_plug->Hmat[0][1] << "\t"
334 >                         << entry_plug->Hmat[1][1] << "\t"
335 >                         << entry_plug->Hmat[2][1] << ";\t"
336 >
337 >                         << entry_plug->Hmat[0][2] << "\t"
338 >                         << entry_plug->Hmat[1][2] << "\t"
339 >                         << entry_plug->Hmat[2][2] << ";";
340 >  
341 >        *outFile[k] << entry_plug->the_integrator->getAdditionalParameters() << endl;
342 >    }
343 >
344 >    currentIndex = 0;
345 >
346 >    for (i = 0 ; i < mpiSim->getTotAtoms(); i++ ) {
347        
348 <      sprintf( tempBuffer,
349 <               "%s\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t",
350 <               atoms[i]->getType(),
351 <               atoms[i]->getX(),
352 <               atoms[i]->getY(),
353 <               atoms[i]->getZ(),
354 <               atoms[i]->get_vx(),
355 <               atoms[i]->get_vy(),
356 <               atoms[i]->get_vz());
357 <      strcpy( writeLine, tempBuffer );
348 >      // Get the Node number which has this atom;
349 >      
350 >      which_node = AtomToProcMap[i];
351 >      
352 >      if (which_node != 0) {
353 >
354 >        if (potatoes[which_node] + 3 >= MAXTAG) {
355 >          // The potato was going to exceed the maximum value,
356 >          // so wrap this processor potato back to 0:        
357 >
358 >          potatoes[which_node] = 0;          
359 >          MPI_Send(0, 1, MPI_INT, which_node, 0, MPI_COMM_WORLD);
360 >          
361 >        }
362 >
363 >        myPotato = potatoes[which_node];        
364 >        
365 >        MPI_Recv(MPIatomTypeString, MINIBUFFERSIZE, MPI_CHAR, which_node,
366 >                 myPotato, MPI_COMM_WORLD, &istatus);
367 >        
368 >        atomTypeString = MPIatomTypeString;
369          
370 <      if( atoms[i]->isDirectional() ){
370 >        myPotato++;
371 >
372 >        MPI_Recv(&isDirectional, 1, MPI_INT, which_node,
373 >                 myPotato, MPI_COMM_WORLD, &istatus);
374 >              
375 >        myPotato++;
376 >
377 >        if (isDirectional) {          
378 >          MPI_Recv(atomData13, 13, MPI_DOUBLE, which_node,
379 >                   myPotato, MPI_COMM_WORLD, &istatus);
380 >        } else {
381 >          MPI_Recv(atomData6, 6, MPI_DOUBLE, which_node,
382 >                   myPotato, MPI_COMM_WORLD, &istatus);          
383 >        }
384 >        
385 >        myPotato++;
386 >        potatoes[which_node] = myPotato;
387 >
388 >      } else {
389 >        
390 >        haveError = 0;
391 >        which_atom = i;
392 >        
393 >          local_index = indexArray[currentIndex].first;        
394 >          
395 >          if (which_atom == indexArray[currentIndex].second) {
396 >            
397 >            atomTypeString = atoms[local_index]->getType();
398 >            
399 >          atoms[local_index]->getPos(pos);
400 >          atoms[local_index]->getVel(vel);          
401            
402 <        dAtom = (DirectionalAtom *)atoms[i];
403 <        dAtom->getQ( q );
404 <          
405 <        sprintf( tempBuffer,
406 <                 "%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\n",
407 <                 q[0],
408 <                 q[1],
409 <                 q[2],
410 <                 q[3],
411 <                 dAtom->getJx(),
412 <                 dAtom->getJy(),
413 <                 dAtom->getJz());
414 <        strcat( writeLine, tempBuffer );
402 >          atomData6[0] = pos[0];
403 >          atomData6[1] = pos[1];
404 >          atomData6[2] = pos[2];
405 >
406 >          atomData6[3] = vel[0];
407 >          atomData6[4] = vel[1];
408 >          atomData6[5] = vel[2];
409 >          
410 >          isDirectional = 0;
411 >
412 >          if( atoms[local_index]->isDirectional() ){
413 >
414 >            isDirectional = 1;
415 >            
416 >            dAtom = (DirectionalAtom *)atoms[local_index];
417 >            dAtom->getQ( q );
418 >
419 >            for (int j = 0; j < 6 ; j++)
420 >              atomData13[j] = atomData6[j];            
421 >            
422 >            atomData13[6] = q[0];
423 >            atomData13[7] = q[1];
424 >            atomData13[8] = q[2];
425 >            atomData13[9] = q[3];
426 >            
427 >            atomData13[10] = dAtom->getJx();
428 >            atomData13[11] = dAtom->getJy();
429 >            atomData13[12] = dAtom->getJz();
430 >          }
431 >          
432 >        } else {
433 >          sprintf(painCave.errMsg,
434 >                  "Atom %d not found on processor %d, currentIndex = %d, local_index = %d\n",
435 >                  which_atom, worldRank, currentIndex, local_index );
436 >          haveError= 1;
437 >          simError();
438 >        }
439 >        
440 >        if(haveError) DieDieDie();
441 >        
442 >        currentIndex++;
443        }
444 <      else
444 >      // If we've survived to here, format the line:
445 >      
446 >      if (!isDirectional) {
447 >        
448 >        sprintf( writeLine,
449 >                 "%s\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t",
450 >                 atomTypeString,
451 >                 atomData6[0],
452 >                 atomData6[1],
453 >                 atomData6[2],
454 >                 atomData6[3],
455 >                 atomData6[4],
456 >                 atomData6[5]);
457 >        
458          strcat( writeLine, "0.0\t0.0\t0.0\t0.0\t0.0\t0.0\t0.0\n" );
459          
460 <      finalOut << writeLine;
461 <      masterIndex++;
460 >      } else {
461 >        
462 >        sprintf( writeLine,
463 >                 "%s\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\n",
464 >                 atomTypeString,
465 >                 atomData13[0],
466 >                 atomData13[1],
467 >                 atomData13[2],
468 >                 atomData13[3],
469 >                 atomData13[4],
470 >                 atomData13[5],
471 >                 atomData13[6],
472 >                 atomData13[7],
473 >                 atomData13[8],
474 >                 atomData13[9],
475 >                 atomData13[10],
476 >                 atomData13[11],
477 >                 atomData13[12]);
478 >        
479 >      }
480 >      
481 >      for(k = 0; k < outFile.size(); k++)
482 >        *outFile[k] << writeLine;
483      }
442 –    finalOut.flush();
443 –  }
484      
485 <  for (procIndex = 1; procIndex < mpiSim->getNumberProcessors();
486 <       procIndex++){
485 >    for(k = 0; k < outFile.size(); k++)
486 >      outFile[k]->flush();
487 >    
488 >    sprintf( checkPointMsg,
489 >             "Sucessfully took a dump.\n");
490 >    
491 >    MPIcheckPoint();        
492 >    
493 >    delete[] potatoes;
494 >    
495 >  } else {
496  
497 <    if( worldRank == 0 ){
449 <        
450 <      mpiErr = MPI_Recv(&nodeAtomsStart,1,MPI_INT,procIndex,
451 <                        TAKE_THIS_TAG,MPI_COMM_WORLD,istatus);
497 >    // worldRank != 0, so I'm a remote node.  
498  
499 <      mpiErr = MPI_Recv(&nodeAtomsEnd,1,MPI_INT,procIndex,
454 <                        TAKE_THIS_TAG,MPI_COMM_WORLD, istatus);
455 <        
456 <      // Make sure where node 0 is writing to, matches where the
457 <      // receiving node expects it to be.
458 <        
459 <      if (masterIndex != nodeAtomsStart){
460 <        sendError = 1;
461 <        mpiErr = MPI_Send(&sendError,1,MPI_INT,procIndex,TAKE_THIS_TAG,
462 <                          MPI_COMM_WORLD);
463 <        sprintf(painCave.errMsg,
464 <                "DumpWriter error: atoms start index (%d) for "
465 <                "node %d not equal to master index (%d)",
466 <                nodeAtomsStart,procIndex,masterIndex );
467 <        painCave.isFatal = 1;
468 <        simError();
469 <      }
470 <        
471 <      sendError = 0;
472 <      mpiErr = MPI_Send(&sendError,1,MPI_INT,procIndex,TAKE_THIS_TAG,
473 <                        MPI_COMM_WORLD);
499 >    // Set my magic potato to 0:
500  
501 <      // recieve the nodes writeLines
501 >    myPotato = 0;
502 >    currentIndex = 0;
503 >    
504 >    for (i = 0 ; i < mpiSim->getTotAtoms(); i++ ) {
505 >      
506 >      // Am I the node which has this atom?
507 >      
508 >      if (AtomToProcMap[i] == worldRank) {
509  
510 <      for ( i = nodeAtomsStart; i <= nodeAtomsEnd; i++){
510 >        if (myPotato + 3 >= MAXTAG) {
511            
512 <        mpiErr = MPI_Recv(writeLine,BUFFERSIZE,MPI_CHAR,procIndex,
513 <                          TAKE_THIS_TAG,MPI_COMM_WORLD,istatus );
512 >          // The potato was going to exceed the maximum value,
513 >          // so wrap this processor potato back to 0 (and block until
514 >          // node 0 says we can go:
515 >          
516 >          MPI_Recv(&myPotato, 1, MPI_INT, 0, 0, MPI_COMM_WORLD, &istatus);
517 >          
518 >        }
519 >        which_atom = i;
520  
521 <        finalOut << writeLine;
522 <        masterIndex++;
523 <      }
521 >        local_index = indexArray[currentIndex].first;        
522 >                
523 >        if (which_atom == indexArray[currentIndex].second) {
524 >        
525 >          atomTypeString = atoms[local_index]->getType();
526 >          
527 >          atoms[local_index]->getPos(pos);
528 >          atoms[local_index]->getVel(vel);
529 >          
530 >          atomData6[0] = pos[0];
531 >          atomData6[1] = pos[1];
532 >          atomData6[2] = pos[2];
533  
534 <      finalOut.flush();
535 <    }
534 >          atomData6[3] = vel[0];
535 >          atomData6[4] = vel[1];
536 >          atomData6[5] = vel[2];
537 >          
538 >          isDirectional = 0;
539  
540 <    else if( worldRank == procIndex ){
540 >          if( atoms[local_index]->isDirectional() ){
541  
542 <      nodeAtomsStart = mpiSim->getMyAtomStart();
543 <      nodeAtomsEnd = mpiSim->getMyAtomEnd();
542 >            isDirectional = 1;
543 >            
544 >            dAtom = (DirectionalAtom *)atoms[local_index];
545 >            dAtom->getQ( q );
546 >            
547 >            for (int j = 0; j < 6 ; j++)
548 >              atomData13[j] = atomData6[j];
549 >            
550 >            atomData13[6] = q[0];
551 >            atomData13[7] = q[1];
552 >            atomData13[8] = q[2];
553 >            atomData13[9] = q[3];
554 >  
555 >            atomData13[10] = dAtom->getJx();
556 >            atomData13[11] = dAtom->getJy();
557 >            atomData13[12] = dAtom->getJz();
558 >          }
559 >
560 >        } else {
561 >          sprintf(painCave.errMsg,
562 >                  "Atom %d not found on processor %d, currentIndex = %d, local_index = %d\n",
563 >                  which_atom, worldRank, currentIndex, local_index );
564 >          haveError= 1;
565 >          simError();
566 >        }
567          
568 <      mpiErr = MPI_Send(&nodeAtomsStart,1,MPI_INT,0,TAKE_THIS_TAG,
495 <                        MPI_COMM_WORLD);
496 <      mpiErr = MPI_Send(&nodeAtomsEnd,1,MPI_INT,0,TAKE_THIS_TAG,
497 <                        MPI_COMM_WORLD);
498 <        
499 <      mpiErr = MPI_Recv(&sendError,1,MPI_INT,0,TAKE_THIS_TAG,
500 <                        MPI_COMM_WORLD, istatus);
501 <      if (sendError) MPIcheckPoint();
568 >        strncpy(MPIatomTypeString, atomTypeString, MINIBUFFERSIZE);
569  
570 <      // send current node's configuration line by line.
570 >        // null terminate the string before sending (just in case):
571 >        MPIatomTypeString[MINIBUFFERSIZE-1] = '\0';
572  
573 <      for( i=0; i<nAtoms; i++ ){
574 <          
575 <        sprintf( tempBuffer,
576 <                 "%s\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t",
577 <                 atoms[i]->getType(),
578 <                 atoms[i]->getX(),
579 <                 atoms[i]->getY(),
580 <                 atoms[i]->getZ(),
581 <                 atoms[i]->get_vx(),
582 <                 atoms[i]->get_vy(),
583 <                 atoms[i]->get_vz());
584 <        strcpy( writeLine, tempBuffer );
585 <          
586 <        if( atoms[i]->isDirectional() ){
587 <            
588 <          dAtom = (DirectionalAtom *)atoms[i];
589 <          dAtom->getQ( q );
590 <            
591 <          sprintf( tempBuffer,
592 <                   "%lf\t%lf\t%lf\t%lf\t%lf\t%lf\t%lf\n",
593 <                   q[0],
594 <                   q[1],
595 <                   q[2],
528 <                   q[3],
529 <                   dAtom->getJx(),
530 <                   dAtom->getJy(),
531 <                   dAtom->getJz());
532 <          strcat( writeLine, tempBuffer );
533 <        }
534 <        else
535 <          strcat( writeLine, "0.0\t0.0\t0.0\t0.0\t0.0\t0.0\t0.0\n" );
536 <          
537 <        mpiErr = MPI_Send(writeLine,BUFFERSIZE,MPI_CHAR,0,TAKE_THIS_TAG,
538 <                          MPI_COMM_WORLD);
573 >        MPI_Send(MPIatomTypeString, MINIBUFFERSIZE, MPI_CHAR, 0,
574 >                             myPotato, MPI_COMM_WORLD);
575 >        
576 >        myPotato++;
577 >
578 >        MPI_Send(&isDirectional, 1, MPI_INT, 0,
579 >                             myPotato, MPI_COMM_WORLD);
580 >        
581 >        myPotato++;
582 >        
583 >        if (isDirectional) {
584 >
585 >          MPI_Send(atomData13, 13, MPI_DOUBLE, 0,
586 >                   myPotato, MPI_COMM_WORLD);
587 >          
588 >        } else {
589 >
590 >          MPI_Send(atomData6, 6, MPI_DOUBLE, 0,
591 >                   myPotato, MPI_COMM_WORLD);
592 >        }
593 >
594 >        myPotato++;  
595 >        currentIndex++;    
596        }
597      }
541 –      
542 –    sprintf(checkPointMsg,"Node %d sent dump configuration.",
543 –            procIndex);
544 –    MPIcheckPoint();
545 –  }
598  
599 <  if( worldRank == 0 ) finalOut.close();
600 <
599 >    sprintf( checkPointMsg,
600 >             "Sucessfully took a dump.\n");
601 >    MPIcheckPoint();        
602      
603 +  }
604 +  
605   #endif // is_mpi
606   }
607 +
608 + #ifdef IS_MPI
609 +
610 + // a couple of functions to let us escape the write loop
611 +
612 + void dWrite::DieDieDie( void ){
613 +
614 +  MPI_Finalize();
615 +  exit (0);
616 + }
617 +
618 + #endif //is_mpi

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