Actual source code: init.c

petsc-master 2017-11-16
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  1: /*

  3:    This file defines part of the initialization of PETSc

  5:   This file uses regular malloc and free because it cannot known
  6:   what malloc is being used until it has already processed the input.
  7: */

  9:  #include <petscsys.h>
 10:  #include <petsc/private/petscimpl.h>
 11:  #include <petscvalgrind.h>
 12:  #include <petscviewer.h>

 14: #if defined(PETSC_HAVE_SYS_SYSINFO_H)
 15: #include <sys/sysinfo.h>
 16: #endif
 17: #if defined(PETSC_HAVE_UNISTD_H)
 18: #include <unistd.h>
 19: #endif
 20: #if defined(PETSC_HAVE_CUDA)
 21: #include <cuda_runtime.h>
 22: #endif

 24: #if defined(PETSC_HAVE_VIENNACL)
 25: PETSC_EXTERN PetscErrorCode PetscViennaCLInit();
 26: #endif

 28: /* ------------------------Nasty global variables -------------------------------*/
 29: /*
 30:      Indicates if PETSc started up MPI, or it was
 31:    already started before PETSc was initialized.
 32: */
 33: PetscBool   PetscBeganMPI         = PETSC_FALSE;
 34: PetscBool   PetscInitializeCalled = PETSC_FALSE;
 35: PetscBool   PetscFinalizeCalled   = PETSC_FALSE;
 36: PetscBool   PetscCUDAInitialized  = PETSC_FALSE;

 38: PetscMPIInt PetscGlobalRank       = -1;
 39: PetscMPIInt PetscGlobalSize       = -1;

 41: #if defined(PETSC_HAVE_COMPLEX)
 42: #if defined(PETSC_COMPLEX_INSTANTIATE)
 43: template <> class std::complex<double>; /* instantiate complex template class */
 44: #endif
 45: #if !defined(PETSC_HAVE_MPI_C_DOUBLE_COMPLEX)
 46: MPI_Datatype MPIU_C_DOUBLE_COMPLEX;
 47: MPI_Datatype MPIU_C_COMPLEX;
 48: #endif

 50: /*MC
 51:    PETSC_i - the imaginary number i

 53:    Synopsis:
 54:    #include <petscsys.h>
 55:    PetscComplex PETSC_i;

 57:    Level: beginner

 59:    Note:
 60:    Complex numbers are automatically available if PETSc located a working complex implementation

 62: .seealso: PetscRealPart(), PetscImaginaryPart(), PetscRealPartComplex(), PetscImaginaryPartComplex()
 63: M*/
 64: PetscComplex PETSC_i;
 65: #endif
 66: #if defined(PETSC_USE_REAL___FLOAT128)
 67: MPI_Datatype MPIU___FLOAT128 = 0;
 68: #if defined(PETSC_HAVE_COMPLEX)
 69: MPI_Datatype MPIU___COMPLEX128 = 0;
 70: #endif
 71: #elif defined(PETSC_USE_REAL___FP16)
 72: MPI_Datatype MPIU___FP16 = 0;
 73: #endif
 74: MPI_Datatype MPIU_2SCALAR = 0;
 75: #if defined(PETSC_USE_64BIT_INDICES) || !defined(MPI_2INT)
 76: MPI_Datatype MPIU_2INT = 0;
 77: #endif
 78: MPI_Datatype MPIU_BOOL;
 79: MPI_Datatype MPIU_ENUM;

 81: /*
 82:        Function that is called to display all error messages
 83: */
 84: PetscErrorCode (*PetscErrorPrintf)(const char [],...)          = PetscErrorPrintfDefault;
 85: PetscErrorCode (*PetscHelpPrintf)(MPI_Comm,const char [],...)  = PetscHelpPrintfDefault;
 86: #if defined(PETSC_HAVE_MATLAB_ENGINE)
 87: PetscErrorCode (*PetscVFPrintf)(FILE*,const char[],va_list)    = PetscVFPrintf_Matlab;
 88: #else
 89: PetscErrorCode (*PetscVFPrintf)(FILE*,const char[],va_list)    = PetscVFPrintfDefault;
 90: #endif
 91: /*
 92:   This is needed to turn on/off GPU synchronization
 93: */
 94: PetscBool PetscCUSPSynchronize = PETSC_FALSE;
 95: PetscBool PetscViennaCLSynchronize = PETSC_FALSE;
 96: PetscBool PetscCUDASynchronize = PETSC_FALSE;

 98: /* ------------------------------------------------------------------------------*/
 99: /*
100:    Optional file where all PETSc output from various prints is saved
101: */
102: FILE *petsc_history = NULL;

104: PetscErrorCode  PetscOpenHistoryFile(const char filename[],FILE **fd)
105: {
107:   PetscMPIInt    rank,size;
108:   char           pfile[PETSC_MAX_PATH_LEN],pname[PETSC_MAX_PATH_LEN],fname[PETSC_MAX_PATH_LEN],date[64];
109:   char           version[256];

112:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
113:   if (!rank) {
114:     char        arch[10];
115:     int         err;

117:     PetscGetArchType(arch,10);
118:     PetscGetDate(date,64);
119:     PetscGetVersion(version,256);
120:     MPI_Comm_size(PETSC_COMM_WORLD,&size);
121:     if (filename) {
122:       PetscFixFilename(filename,fname);
123:     } else {
124:       PetscGetHomeDirectory(pfile,240);
125:       PetscStrcat(pfile,"/.petschistory");
126:       PetscFixFilename(pfile,fname);
127:     }

129:     *fd = fopen(fname,"a");
130:     if (!fd) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_FILE_OPEN,"Cannot open file: %s",fname);

132:     PetscFPrintf(PETSC_COMM_SELF,*fd,"---------------------------------------------------------\n");
133:     PetscFPrintf(PETSC_COMM_SELF,*fd,"%s %s\n",version,date);
134:     PetscGetProgramName(pname,PETSC_MAX_PATH_LEN);
135:     PetscFPrintf(PETSC_COMM_SELF,*fd,"%s on a %s, %d proc. with options:\n",pname,arch,size);
136:     PetscFPrintf(PETSC_COMM_SELF,*fd,"---------------------------------------------------------\n");

138:     err = fflush(*fd);
139:     if (err) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SYS,"fflush() failed on file");
140:   }
141:   return(0);
142: }

144: PetscErrorCode  PetscCloseHistoryFile(FILE **fd)
145: {
147:   PetscMPIInt    rank;
148:   char           date[64];
149:   int            err;

152:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
153:   if (!rank) {
154:     PetscGetDate(date,64);
155:     PetscFPrintf(PETSC_COMM_SELF,*fd,"---------------------------------------------------------\n");
156:     PetscFPrintf(PETSC_COMM_SELF,*fd,"Finished at %s\n",date);
157:     PetscFPrintf(PETSC_COMM_SELF,*fd,"---------------------------------------------------------\n");
158:     err  = fflush(*fd);
159:     if (err) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SYS,"fflush() failed on file");
160:     err = fclose(*fd);
161:     if (err) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SYS,"fclose() failed on file");
162:   }
163:   return(0);
164: }

166: /* ------------------------------------------------------------------------------*/

168: /*
169:    This is ugly and probably belongs somewhere else, but I want to
170:   be able to put a true MPI abort error handler with command line args.

172:     This is so MPI errors in the debugger will leave all the stack
173:   frames. The default MP_Abort() cleans up and exits thus providing no useful information
174:   in the debugger hence we call abort() instead of MPI_Abort().
175: */

177: void Petsc_MPI_AbortOnError(MPI_Comm *comm,PetscMPIInt *flag)
178: {
180:   (*PetscErrorPrintf)("MPI error %d\n",*flag);
181:   abort();
182: }

184: void Petsc_MPI_DebuggerOnError(MPI_Comm *comm,PetscMPIInt *flag)
185: {

189:   (*PetscErrorPrintf)("MPI error %d\n",*flag);
190:   PetscAttachDebugger();
191:   if (ierr) MPI_Abort(*comm,*flag); /* hopeless so get out */
192: }

194: /*@C
195:    PetscEnd - Calls PetscFinalize() and then ends the program. This is useful if one
196:      wishes a clean exit somewhere deep in the program.

198:    Collective on PETSC_COMM_WORLD

200:    Options Database Keys are the same as for PetscFinalize()

202:    Level: advanced

204:    Note:
205:    See PetscInitialize() for more general runtime options.

207: .seealso: PetscInitialize(), PetscOptionsView(), PetscMallocDump(), PetscMPIDump(), PetscFinalize()
208: @*/
209: PetscErrorCode  PetscEnd(void)
210: {
212:   PetscFinalize();
213:   exit(0);
214:   return 0;
215: }

217: PetscBool PetscOptionsPublish = PETSC_FALSE;
218: extern PetscErrorCode PetscSetUseTrMalloc_Private(void);
219: extern PetscErrorCode PetscSetUseHBWMalloc_Private(void);
220: extern PetscBool      petscsetmallocvisited;
221: static char           emacsmachinename[256];

223: PetscErrorCode (*PetscExternalVersionFunction)(MPI_Comm) = 0;
224: PetscErrorCode (*PetscExternalHelpFunction)(MPI_Comm)    = 0;

226: /*@C
227:    PetscSetHelpVersionFunctions - Sets functions that print help and version information
228:    before the PETSc help and version information is printed. Must call BEFORE PetscInitialize().
229:    This routine enables a "higher-level" package that uses PETSc to print its messages first.

231:    Input Parameter:
232: +  help - the help function (may be NULL)
233: -  version - the version function (may be NULL)

235:    Level: developer

237:    Concepts: package help message

239: @*/
240: PetscErrorCode  PetscSetHelpVersionFunctions(PetscErrorCode (*help)(MPI_Comm),PetscErrorCode (*version)(MPI_Comm))
241: {
243:   PetscExternalHelpFunction    = help;
244:   PetscExternalVersionFunction = version;
245:   return(0);
246: }

248: #if defined(PETSC_USE_LOG)
249: extern PetscBool   PetscObjectsLog;
250: #endif

252: PetscErrorCode  PetscOptionsCheckInitial_Private(void)
253: {
254:   char              string[64],mname[PETSC_MAX_PATH_LEN],*f;
255:   MPI_Comm          comm = PETSC_COMM_WORLD;
256:   PetscBool         flg1 = PETSC_FALSE,flg2 = PETSC_FALSE,flg3 = PETSC_FALSE,flag;
257:   PetscErrorCode    ierr;
258:   PetscReal         si;
259:   PetscInt          intensity;
260:   int               i;
261:   PetscMPIInt       rank;
262:   char              version[256],helpoptions[256];
263: #if !defined(PETSC_HAVE_THREADSAFETY)
264:   PetscReal         logthreshold;
265: #endif
266: #if defined(PETSC_USE_LOG)
267:   PetscViewerFormat format;
268:   PetscBool         flg4 = PETSC_FALSE;
269: #endif

272:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);

274: #if !defined(PETSC_HAVE_THREADSAFETY)
275:   /*
276:       Setup the memory management; support for tracing malloc() usage
277:   */
278:   PetscOptionsHasName(NULL,NULL,"-malloc_log",&flg3);
279:   logthreshold = 0.0;
280:   PetscOptionsGetReal(NULL,NULL,"-malloc_log_threshold",&logthreshold,&flg1);
281:   if (flg1) flg3 = PETSC_TRUE;
282: #if defined(PETSC_USE_DEBUG)
283:   PetscOptionsGetBool(NULL,NULL,"-malloc",&flg1,&flg2);
284:   if ((!flg2 || flg1) && !petscsetmallocvisited) {
285:     if (flg2 || !(PETSC_RUNNING_ON_VALGRIND)) {
286:       /* turn off default -malloc if valgrind is being used */
287:       PetscSetUseTrMalloc_Private();
288:     }
289:   }
290: #else
291:   PetscOptionsGetBool(NULL,NULL,"-malloc_dump",&flg1,NULL);
292:   PetscOptionsGetBool(NULL,NULL,"-malloc",&flg2,NULL);
293:   if (flg1 || flg2 || flg3) {PetscSetUseTrMalloc_Private();}
294: #endif
295:   if (flg3) {
296:     PetscMallocSetDumpLogThreshold((PetscLogDouble)logthreshold);
297:   }
298:   PetscOptionsGetBool(NULL,NULL,"-malloc_coalesce",&flg1,&flg2);
299:   if (flg2) {PetscMallocSetCoalesce(flg1);}
300:   flg1 = PETSC_FALSE;
301:   PetscOptionsGetBool(NULL,NULL,"-malloc_debug",&flg1,NULL);
302:   if (flg1) {
303:     PetscSetUseTrMalloc_Private();
304:     PetscMallocDebug(PETSC_TRUE);
305:   }
306:   flg1 = PETSC_FALSE;
307:   PetscOptionsGetBool(NULL,NULL,"-malloc_test",&flg1,NULL);
308: #if defined(PETSC_USE_DEBUG)
309:   if (flg1 && !PETSC_RUNNING_ON_VALGRIND) {
310:     PetscSetUseTrMalloc_Private();
311:     PetscMallocSetDumpLog();
312:     PetscMallocDebug(PETSC_TRUE);
313:   }
314: #endif
315:   flg1 = PETSC_FALSE;
316:   PetscOptionsGetBool(NULL,NULL,"-malloc_hbw",&flg1,NULL);
317:   if (flg1) {PetscSetUseHBWMalloc_Private();}

319:   flg1 = PETSC_FALSE;
320:   PetscOptionsGetBool(NULL,NULL,"-malloc_info",&flg1,NULL);
321:   if (!flg1) {
322:     flg1 = PETSC_FALSE;
323:     PetscOptionsGetBool(NULL,NULL,"-memory_view",&flg1,NULL);
324:   }
325:   if (flg1) {
326:     PetscMemorySetGetMaximumUsage();
327:   }
328: #endif

330: #if defined(PETSC_USE_LOG)
331:   PetscOptionsHasName(NULL,NULL,"-objects_dump",&PetscObjectsLog);
332: #endif

334:   /*
335:       Set the display variable for graphics
336:   */
337:   PetscSetDisplay();

339:   /*
340:       Print the PETSc version information
341:   */
342:   PetscOptionsHasName(NULL,NULL,"-v",&flg1);
343:   PetscOptionsHasName(NULL,NULL,"-version",&flg2);
344:   PetscOptionsHasName(NULL,NULL,"-help",&flg3);
345:   if (flg1 || flg2 || flg3) {

347:     /*
348:        Print "higher-level" package version message
349:     */
350:     if (PetscExternalVersionFunction) {
351:       (*PetscExternalVersionFunction)(comm);
352:     }

354:     PetscGetVersion(version,256);
355:     (*PetscHelpPrintf)(comm,"--------------------------------------------------------------------------\n");
356:     (*PetscHelpPrintf)(comm,"%s\n",version);
357:     (*PetscHelpPrintf)(comm,"%s",PETSC_AUTHOR_INFO);
358:     (*PetscHelpPrintf)(comm,"See docs/changes/index.html for recent updates.\n");
359:     (*PetscHelpPrintf)(comm,"See docs/faq.html for problems.\n");
360:     (*PetscHelpPrintf)(comm,"See docs/manualpages/index.html for help. \n");
361:     (*PetscHelpPrintf)(comm,"Libraries linked from %s\n",PETSC_LIB_DIR);
362:     (*PetscHelpPrintf)(comm,"--------------------------------------------------------------------------\n");
363:   }

365:   /*
366:        Print "higher-level" package help message
367:   */
368:   if (flg3) {
369:     if (PetscExternalHelpFunction) {
370:       (*PetscExternalHelpFunction)(comm);
371:     }
372:   }

374:   PetscOptionsGetString(NULL,NULL,"-help",helpoptions,sizeof(helpoptions),&flg1);
375:   if (flg1) {
376:     PetscStrcmp(helpoptions,"intro",&flg2);
377:     if (flg2) {
378:       PetscOptionsDestroyDefault();
379:       PetscFreeMPIResources();
380:       MPI_Finalize();
381:       exit(0);
382:     }
383:   }

385:   /*
386:       Setup the error handling
387:   */
388:   flg1 = PETSC_FALSE;
389:   PetscOptionsGetBool(NULL,NULL,"-on_error_abort",&flg1,NULL);
390:   if (flg1) {
391:     MPI_Comm_set_errhandler(PETSC_COMM_WORLD,MPI_ERRORS_ARE_FATAL);
392:     PetscPushErrorHandler(PetscAbortErrorHandler,0);
393:   }
394:   flg1 = PETSC_FALSE;
395:   PetscOptionsGetBool(NULL,NULL,"-on_error_mpiabort",&flg1,NULL);
396:   if (flg1) { PetscPushErrorHandler(PetscMPIAbortErrorHandler,0);}
397:   flg1 = PETSC_FALSE;
398:   PetscOptionsGetBool(NULL,NULL,"-mpi_return_on_error",&flg1,NULL);
399:   if (flg1) {
400:     MPI_Comm_set_errhandler(comm,MPI_ERRORS_RETURN);
401:   }
402:   flg1 = PETSC_FALSE;
403:   PetscOptionsGetBool(NULL,NULL,"-no_signal_handler",&flg1,NULL);
404:   if (!flg1) {PetscPushSignalHandler(PetscSignalHandlerDefault,(void*)0);}
405:   flg1 = PETSC_FALSE;
406:   PetscOptionsGetBool(NULL,NULL,"-fp_trap",&flg1,NULL);
407:   if (flg1) {PetscSetFPTrap(PETSC_FP_TRAP_ON);}
408:   PetscOptionsGetInt(NULL,NULL,"-check_pointer_intensity",&intensity,&flag);

411:   /*
412:       Setup debugger information
413:   */
414:   PetscSetDefaultDebugger();
415:   PetscOptionsGetString(NULL,NULL,"-on_error_attach_debugger",string,64,&flg1);
416:   if (flg1) {
417:     MPI_Errhandler err_handler;

419:     PetscSetDebuggerFromString(string);
420:     MPI_Comm_create_errhandler((MPI_Handler_function*)Petsc_MPI_DebuggerOnError,&err_handler);
421:     MPI_Comm_set_errhandler(comm,err_handler);
422:     PetscPushErrorHandler(PetscAttachDebuggerErrorHandler,0);
423:   }
424:   PetscOptionsGetString(NULL,NULL,"-debug_terminal",string,64,&flg1);
425:   if (flg1) { PetscSetDebugTerminal(string); }
426:   PetscOptionsGetString(NULL,NULL,"-start_in_debugger",string,64,&flg1);
427:   PetscOptionsGetString(NULL,NULL,"-stop_for_debugger",string,64,&flg2);
428:   if (flg1 || flg2) {
429:     PetscMPIInt    size;
430:     PetscInt       lsize,*nodes;
431:     MPI_Errhandler err_handler;
432:     /*
433:        we have to make sure that all processors have opened
434:        connections to all other processors, otherwise once the
435:        debugger has stated it is likely to receive a SIGUSR1
436:        and kill the program.
437:     */
438:     MPI_Comm_size(PETSC_COMM_WORLD,&size);
439:     if (size > 2) {
440:       PetscMPIInt dummy = 0;
441:       MPI_Status  status;
442:       for (i=0; i<size; i++) {
443:         if (rank != i) {
444:           MPI_Send(&dummy,1,MPI_INT,i,109,PETSC_COMM_WORLD);
445:         }
446:       }
447:       for (i=0; i<size; i++) {
448:         if (rank != i) {
449:           MPI_Recv(&dummy,1,MPI_INT,i,109,PETSC_COMM_WORLD,&status);
450:         }
451:       }
452:     }
453:     /* check if this processor node should be in debugger */
454:     PetscMalloc1(size,&nodes);
455:     lsize = size;
456:     PetscOptionsGetIntArray(NULL,NULL,"-debugger_nodes",nodes,&lsize,&flag);
457:     if (flag) {
458:       for (i=0; i<lsize; i++) {
459:         if (nodes[i] == rank) { flag = PETSC_FALSE; break; }
460:       }
461:     }
462:     if (!flag) {
463:       PetscSetDebuggerFromString(string);
464:       PetscPushErrorHandler(PetscAbortErrorHandler,0);
465:       if (flg1) {
466:         PetscAttachDebugger();
467:       } else {
468:         PetscStopForDebugger();
469:       }
470:       MPI_Comm_create_errhandler((MPI_Handler_function*)Petsc_MPI_AbortOnError,&err_handler);
471:       MPI_Comm_set_errhandler(comm,err_handler);
472:     }
473:     PetscFree(nodes);
474:   }

476:   PetscOptionsGetString(NULL,NULL,"-on_error_emacs",emacsmachinename,128,&flg1);
477:   if (flg1 && !rank) {PetscPushErrorHandler(PetscEmacsClientErrorHandler,emacsmachinename);}

479:   /*
480:         Setup profiling and logging
481:   */
482: #if defined(PETSC_USE_INFO)
483:   {
484:     char logname[PETSC_MAX_PATH_LEN]; logname[0] = 0;
485:     PetscOptionsGetString(NULL,NULL,"-info",logname,250,&flg1);
486:     if (flg1 && logname[0]) {
487:       PetscInfoAllow(PETSC_TRUE,logname);
488:     } else if (flg1) {
489:       PetscInfoAllow(PETSC_TRUE,NULL);
490:     }
491:   }
492: #endif
493: #if defined(PETSC_USE_LOG)
494:   mname[0] = 0;
495:   PetscOptionsGetString(NULL,NULL,"-history",mname,PETSC_MAX_PATH_LEN,&flg1);
496:   if (flg1) {
497:     if (mname[0]) {
498:       PetscOpenHistoryFile(mname,&petsc_history);
499:     } else {
500:       PetscOpenHistoryFile(NULL,&petsc_history);
501:     }
502:   }
503: #if defined(PETSC_HAVE_MPE)
504:   flg1 = PETSC_FALSE;
505:   PetscOptionsHasName(NULL,NULL,"-log_mpe",&flg1);
506:   if (flg1) {PetscLogMPEBegin();}
507: #endif
508:   flg1 = PETSC_FALSE;
509:   flg3 = PETSC_FALSE;
510:   PetscOptionsGetBool(NULL,NULL,"-log_all",&flg1,NULL);
511:   PetscOptionsHasName(NULL,NULL,"-log_summary",&flg3);
512:   if (flg1)                      { PetscLogAllBegin(); }
513:   else if (flg3)                 { PetscLogDefaultBegin();}

515:   PetscOptionsGetString(NULL,NULL,"-log_trace",mname,250,&flg1);
516:   if (flg1) {
517:     char name[PETSC_MAX_PATH_LEN],fname[PETSC_MAX_PATH_LEN];
518:     FILE *file;
519:     if (mname[0]) {
520:       sprintf(name,"%s.%d",mname,rank);
521:       PetscFixFilename(name,fname);
522:       file = fopen(fname,"w");
523:       if (!file) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_FILE_OPEN,"Unable to open trace file: %s",fname);
524:     } else file = PETSC_STDOUT;
525:     PetscLogTraceBegin(file);
526:   }

528:   PetscOptionsGetViewer(PETSC_COMM_WORLD,NULL,"-log_view",NULL,&format,&flg4);
529:   if (flg4) {
530:     if (format == PETSC_VIEWER_ASCII_XML){
531:       PetscLogNestedBegin();
532:     } else {
533:       PetscLogDefaultBegin();
534:     }
535:   }
536: #endif

538:   PetscOptionsGetBool(NULL,NULL,"-saws_options",&PetscOptionsPublish,NULL);

540: #if defined(PETSC_HAVE_CUDA)
541:   PetscOptionsHasName(NULL,NULL,"-cuda_show_devices",&flg1);
542:   if (flg1) {
543:     struct cudaDeviceProp prop;
544:     int                   devCount;
545:     PetscInt              device;
546:     cudaError_t           err = cudaSuccess;

548:     err = cudaGetDeviceCount(&devCount);
549:     if (err != cudaSuccess) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SYS,"error in cudaGetDeviceCount %s",cudaGetErrorString(err));
550:     for (device = 0; device < devCount; ++device) {
551:       err = cudaGetDeviceProperties(&prop, (int)device);
552:       if (err != cudaSuccess) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SYS,"error in cudaGetDeviceProperties %s",cudaGetErrorString(err));
553:       PetscPrintf(PETSC_COMM_WORLD, "CUDA device %D: %s\n", device, prop.name);
554:     }
555:   }
556:   if (!PetscCUDAInitialized) {
557:     PetscMPIInt size;
558:     MPI_Comm_size(PETSC_COMM_WORLD,&size);
559:     if (size>1) {
560:       int         devCount;
561:       PetscInt    device;
562:       PetscMPIInt rank;
563:       cudaError_t err = cudaSuccess;

565:       /* check to see if we force multiple ranks to hit the same GPU */
566:       PetscOptionsGetInt(NULL,NULL,"-cuda_set_device", &device, &flg1);
567:       if (flg1) {
568:         err = cudaSetDevice((int)device);
569:         if (err != cudaSuccess) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SYS,"error in cudaSetDevice %s",cudaGetErrorString(err));
570:       } else {
571:         /* we're not using the same GPU on multiple MPI threads. So try to allocated different   GPUs to different processes */

573:         /* First get the device count */
574:         err   = cudaGetDeviceCount(&devCount);
575:         if (err != cudaSuccess) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SYS,"error in cudaGetDeviceCount %s",cudaGetErrorString(err));

577:         /* next determine the rank and then set the device via a mod */
578:         MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
579:         device = rank % devCount;
580:         err    = cudaSetDevice((int)device);
581:         if (err != cudaSuccess) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SYS,"error in cudaSetDevice %s",cudaGetErrorString(err));
582:       }

584:       /* set the device flags so that it can map host memory ... do NOT throw exception on err!=cudaSuccess
585:        multiple devices may try to set the flags on the same device. So long as one of them succeeds, things
586:        are ok. */
587:       err = cudaSetDeviceFlags(cudaDeviceMapHost);
588:       if (err != cudaSuccess) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SYS,"error in cudaSetDeviceFlags %s",cudaGetErrorString(err));
589:     } else {
590:       PetscInt    device;
591:       cudaError_t err = cudaSuccess;

593:       /* the code below works for serial GPU simulations */
594:       PetscOptionsGetInt(NULL,NULL,"-cuda_set_device", &device, &flg1);
595:       if (flg1) {
596:         err = cudaSetDevice((int)device);
597:         if (err != cudaSuccess) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SYS,"error in cudaSetDevice %s",cudaGetErrorString(err));
598:       }

600:       /* set the device flags so that it can map host memory ... here, we error check. */
601:       err = cudaSetDeviceFlags(cudaDeviceMapHost);
602:       if (err != cudaSuccess) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SYS,"error in cudaSetDeviceFlags %s",cudaGetErrorString(err));
603:     }

605:     PetscCUDAInitialized = PETSC_TRUE;
606:   }
607: #endif


610:   /*
611:        Print basic help message
612:   */
613:   PetscOptionsHasName(NULL,NULL,"-help",&flg1);
614:   if (flg1) {
615:     (*PetscHelpPrintf)(comm,"Options for all PETSc programs:\n");
616:     (*PetscHelpPrintf)(comm," -help: prints help method for each option\n");
617:     (*PetscHelpPrintf)(comm," -on_error_abort: cause an abort when an error is detected. Useful \n ");
618:     (*PetscHelpPrintf)(comm,"       only when run in the debugger\n");
619:     (*PetscHelpPrintf)(comm," -on_error_attach_debugger [gdb,dbx,xxgdb,ups,noxterm]\n");
620:     (*PetscHelpPrintf)(comm,"       start the debugger in new xterm\n");
621:     (*PetscHelpPrintf)(comm,"       unless noxterm is given\n");
622:     (*PetscHelpPrintf)(comm," -start_in_debugger [gdb,dbx,xxgdb,ups,noxterm]\n");
623:     (*PetscHelpPrintf)(comm,"       start all processes in the debugger\n");
624:     (*PetscHelpPrintf)(comm," -on_error_emacs <machinename>\n");
625:     (*PetscHelpPrintf)(comm,"    emacs jumps to error file\n");
626:     (*PetscHelpPrintf)(comm," -debugger_nodes [n1,n2,..] Nodes to start in debugger\n");
627:     (*PetscHelpPrintf)(comm," -debugger_pause [m] : delay (in seconds) to attach debugger\n");
628:     (*PetscHelpPrintf)(comm," -stop_for_debugger : prints message on how to attach debugger manually\n");
629:     (*PetscHelpPrintf)(comm,"                      waits the delay for you to attach\n");
630:     (*PetscHelpPrintf)(comm," -display display: Location where X window graphics and debuggers are displayed\n");
631:     (*PetscHelpPrintf)(comm," -no_signal_handler: do not trap error signals\n");
632:     (*PetscHelpPrintf)(comm," -mpi_return_on_error: MPI returns error code, rather than abort on internal error\n");
633:     (*PetscHelpPrintf)(comm," -fp_trap: stop on floating point exceptions\n");
634:     (*PetscHelpPrintf)(comm,"           note on IBM RS6000 this slows run greatly\n");
635:     (*PetscHelpPrintf)(comm," -malloc_dump <optional filename>: dump list of unfreed memory at conclusion\n");
636:     (*PetscHelpPrintf)(comm," -malloc: use our error checking malloc\n");
637:     (*PetscHelpPrintf)(comm," -malloc no: don't use error checking malloc\n");
638:     (*PetscHelpPrintf)(comm," -malloc_info: prints total memory usage\n");
639:     (*PetscHelpPrintf)(comm," -malloc_log: keeps log of all memory allocations\n");
640:     (*PetscHelpPrintf)(comm," -malloc_debug: enables extended checking for memory corruption\n");
641:     (*PetscHelpPrintf)(comm," -options_table: dump list of options inputted\n");
642:     (*PetscHelpPrintf)(comm," -options_left: dump list of unused options\n");
643:     (*PetscHelpPrintf)(comm," -options_left no: don't dump list of unused options\n");
644:     (*PetscHelpPrintf)(comm," -tmp tmpdir: alternative /tmp directory\n");
645:     (*PetscHelpPrintf)(comm," -shared_tmp: tmp directory is shared by all processors\n");
646:     (*PetscHelpPrintf)(comm," -not_shared_tmp: each processor has separate tmp directory\n");
647:     (*PetscHelpPrintf)(comm," -memory_view: print memory usage at end of run\n");
648: #if defined(PETSC_USE_LOG)
649:     (*PetscHelpPrintf)(comm," -get_total_flops: total flops over all processors\n");
650:     (*PetscHelpPrintf)(comm," -log[_summary _summary_python]: logging objects and events\n");
651:     (*PetscHelpPrintf)(comm," -log_trace [filename]: prints trace of all PETSc calls\n");
652: #if defined(PETSC_HAVE_MPE)
653:     (*PetscHelpPrintf)(comm," -log_mpe: Also create logfile viewable through Jumpshot\n");
654: #endif
655:     (*PetscHelpPrintf)(comm," -info <optional filename>: print informative messages about the calculations\n");
656: #endif
657:     (*PetscHelpPrintf)(comm," -v: prints PETSc version number and release date\n");
658:     (*PetscHelpPrintf)(comm," -options_file <file>: reads options from file\n");
659:     (*PetscHelpPrintf)(comm," -petsc_sleep n: sleeps n seconds before running program\n");
660:     (*PetscHelpPrintf)(comm,"-----------------------------------------------\n");
661:   }

663: #if defined(PETSC_HAVE_POPEN)
664:   {
665:   char machine[128];
666:   PetscOptionsGetString(NULL,NULL,"-popen_machine",machine,128,&flg1);
667:   if (flg1) {
668:     PetscPOpenSetMachine(machine);
669:   }
670:   }
671: #endif

673:   PetscOptionsGetReal(NULL,NULL,"-petsc_sleep",&si,&flg1);
674:   if (flg1) {
675:     PetscSleep(si);
676:   }

678:   PetscOptionsGetString(NULL,NULL,"-info_exclude",mname,PETSC_MAX_PATH_LEN,&flg1);
679:   if (flg1) {
680:     PetscStrstr(mname,"null",&f);
681:     if (f) {
682:       PetscInfoDeactivateClass(0);
683:     }
684:   }

686: #if defined(PETSC_HAVE_CUSP) || defined(PETSC_HAVE_VIENNACL) || defined(PETSC_HAVE_VECCUDA)
687:   PetscOptionsHasName(NULL,NULL,"-log_summary",&flg3);
688:   if (!flg3) {
689:   PetscOptionsHasName(NULL,NULL,"-log_view",&flg3);
690:   }
691: #endif
692: #if defined(PETSC_HAVE_CUSP)
693:   PetscOptionsGetBool(NULL,NULL,"-cusp_synchronize",&flg3,NULL);
694:   PetscCUSPSynchronize = flg3;
695: #elif defined(PETSC_HAVE_VIENNACL)
696:   PetscOptionsGetBool(NULL,NULL,"-viennacl_synchronize",&flg3,NULL);
697:   PetscViennaCLSynchronize = flg3;
698: #elif defined(PETSC_HAVE_VECCUDA)
699:   PetscOptionsGetBool(NULL,NULL,"-cuda_synchronize",&flg3,NULL);
700:   PetscCUDASynchronize = flg3;
701: #endif

703: #if defined(PETSC_HAVE_VIENNACL)
704:   PetscViennaCLInit();
705: #endif

707:   return(0);
708: }