xref: /petsc/src/sys/objects/init.c (revision d5b43468fb8780a8feea140ccd6fa3e6a50411cc)
1 /*
2 
3    This file defines part of the initialization of PETSc
4 
5   This file uses regular malloc and free because it cannot be known
6   what malloc is being used until it has already processed the input.
7 */
8 #include <petsc/private/petscimpl.h> /*I  "petscsys.h"   I*/
9 
10 #if defined(PETSC_HAVE_SYS_SYSINFO_H)
11   #include <sys/sysinfo.h>
12 #endif
13 #if defined(PETSC_HAVE_UNISTD_H)
14   #include <unistd.h>
15 #endif
16 
17 /* ------------------------Nasty global variables -------------------------------*/
18 /*
19      Indicates if PETSc started up MPI, or it was
20    already started before PETSc was initialized.
21 */
22 PetscBool PetscBeganMPI                 = PETSC_FALSE;
23 PetscBool PetscErrorHandlingInitialized = PETSC_FALSE;
24 PetscBool PetscInitializeCalled         = PETSC_FALSE;
25 PetscBool PetscFinalizeCalled           = PETSC_FALSE;
26 
27 PetscMPIInt PetscGlobalRank = -1;
28 PetscMPIInt PetscGlobalSize = -1;
29 
30 #if defined(PETSC_HAVE_KOKKOS)
31 PetscBool PetscBeganKokkos = PETSC_FALSE;
32 #endif
33 
34 #if defined(PETSC_HAVE_NVSHMEM)
35 PetscBool PetscBeganNvshmem       = PETSC_FALSE;
36 PetscBool PetscNvshmemInitialized = PETSC_FALSE;
37 #endif
38 
39 PetscBool use_gpu_aware_mpi = PetscDefined(HAVE_MPIUNI) ? PETSC_FALSE : PETSC_TRUE;
40 
41 PetscBool PetscPrintFunctionList = PETSC_FALSE;
42 
43 #if defined(PETSC_HAVE_COMPLEX)
44   #if defined(PETSC_COMPLEX_INSTANTIATE)
45 template <>
46 class std::complex<double>; /* instantiate complex template class */
47   #endif
48 
49 /*MC
50    PETSC_i - the imaginary number i
51 
52    Synopsis:
53    #include <petscsys.h>
54    PetscComplex PETSC_i;
55 
56    Level: beginner
57 
58    Note:
59    Complex numbers are automatically available if PETSc located a working complex implementation
60 
61 .seealso: `PetscRealPart()`, `PetscImaginaryPart()`, `PetscRealPartComplex()`, `PetscImaginaryPartComplex()`
62 M*/
63 PetscComplex PETSC_i;
64 MPI_Datatype MPIU___COMPLEX128 = 0;
65 #endif /* PETSC_HAVE_COMPLEX */
66 #if defined(PETSC_HAVE_REAL___FLOAT128)
67 MPI_Datatype MPIU___FLOAT128 = 0;
68 #endif
69 #if defined(PETSC_HAVE_REAL___FP16)
70 MPI_Datatype MPIU___FP16 = 0;
71 #endif
72 MPI_Datatype MPIU_2SCALAR    = 0;
73 MPI_Datatype MPIU_REAL_INT   = 0;
74 MPI_Datatype MPIU_SCALAR_INT = 0;
75 #if defined(PETSC_USE_64BIT_INDICES)
76 MPI_Datatype MPIU_2INT = 0;
77 #endif
78 MPI_Datatype MPI_4INT  = 0;
79 MPI_Datatype MPIU_4INT = 0;
80 MPI_Datatype MPIU_BOOL;
81 MPI_Datatype MPIU_ENUM;
82 MPI_Datatype MPIU_FORTRANADDR;
83 MPI_Datatype MPIU_SIZE_T;
84 
85 /*
86        Function that is called to display all error messages
87 */
88 PetscErrorCode (*PetscErrorPrintf)(const char[], ...)          = PetscErrorPrintfDefault;
89 PetscErrorCode (*PetscHelpPrintf)(MPI_Comm, const char[], ...) = PetscHelpPrintfDefault;
90 PetscErrorCode (*PetscVFPrintf)(FILE *, const char[], va_list) = PetscVFPrintfDefault;
91 
92 /* ------------------------------------------------------------------------------*/
93 /*
94    Optional file where all PETSc output from various prints is saved
95 */
96 PETSC_INTERN FILE *petsc_history;
97 FILE              *petsc_history = NULL;
98 
99 PetscErrorCode PetscOpenHistoryFile(const char filename[], FILE **fd)
100 {
101   PetscMPIInt rank, size;
102   char        pfile[PETSC_MAX_PATH_LEN], pname[PETSC_MAX_PATH_LEN], fname[PETSC_MAX_PATH_LEN], date[64];
103   char        version[256];
104 
105   PetscFunctionBegin;
106   PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank));
107   if (rank == 0) {
108     char arch[10];
109     int  err;
110 
111     PetscCall(PetscGetArchType(arch, 10));
112     PetscCall(PetscGetDate(date, 64));
113     PetscCall(PetscGetVersion(version, 256));
114     PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size));
115     if (filename) {
116       PetscCall(PetscFixFilename(filename, fname));
117     } else {
118       PetscCall(PetscGetHomeDirectory(pfile, sizeof(pfile)));
119       PetscCall(PetscStrlcat(pfile, "/.petschistory", sizeof(pfile)));
120       PetscCall(PetscFixFilename(pfile, fname));
121     }
122 
123     *fd = fopen(fname, "a");
124     PetscCheck(fd, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Cannot open file: %s", fname);
125 
126     PetscCall(PetscFPrintf(PETSC_COMM_SELF, *fd, "----------------------------------------\n"));
127     PetscCall(PetscFPrintf(PETSC_COMM_SELF, *fd, "%s %s\n", version, date));
128     PetscCall(PetscGetProgramName(pname, sizeof(pname)));
129     PetscCall(PetscFPrintf(PETSC_COMM_SELF, *fd, "%s on a %s, %d proc. with options:\n", pname, arch, size));
130     PetscCall(PetscFPrintf(PETSC_COMM_SELF, *fd, "----------------------------------------\n"));
131 
132     err = fflush(*fd);
133     PetscCheck(!err, PETSC_COMM_SELF, PETSC_ERR_SYS, "fflush() failed on file");
134   }
135   PetscFunctionReturn(0);
136 }
137 
138 PETSC_INTERN PetscErrorCode PetscCloseHistoryFile(FILE **fd)
139 {
140   PetscMPIInt rank;
141   char        date[64];
142   int         err;
143 
144   PetscFunctionBegin;
145   PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank));
146   if (rank == 0) {
147     PetscCall(PetscGetDate(date, 64));
148     PetscCall(PetscFPrintf(PETSC_COMM_SELF, *fd, "----------------------------------------\n"));
149     PetscCall(PetscFPrintf(PETSC_COMM_SELF, *fd, "Finished at %s\n", date));
150     PetscCall(PetscFPrintf(PETSC_COMM_SELF, *fd, "----------------------------------------\n"));
151     err = fflush(*fd);
152     PetscCheck(!err, PETSC_COMM_SELF, PETSC_ERR_SYS, "fflush() failed on file");
153     err = fclose(*fd);
154     PetscCheck(!err, PETSC_COMM_SELF, PETSC_ERR_SYS, "fclose() failed on file");
155   }
156   PetscFunctionReturn(0);
157 }
158 
159 /* ------------------------------------------------------------------------------*/
160 
161 /*
162    This is ugly and probably belongs somewhere else, but I want to
163   be able to put a true MPI abort error handler with command line args.
164 
165     This is so MPI errors in the debugger will leave all the stack
166   frames. The default MP_Abort() cleans up and exits thus providing no useful information
167   in the debugger hence we call abort() instead of MPI_Abort().
168 */
169 
170 void Petsc_MPI_AbortOnError(MPI_Comm *comm, PetscMPIInt *flag, ...)
171 {
172   PetscFunctionBegin;
173   (*PetscErrorPrintf)("MPI error %d\n", *flag);
174   abort();
175 }
176 
177 void Petsc_MPI_DebuggerOnError(MPI_Comm *comm, PetscMPIInt *flag, ...)
178 {
179   PetscFunctionBegin;
180   (*PetscErrorPrintf)("MPI error %d\n", *flag);
181   if (PetscAttachDebugger()) PETSCABORT(*comm, *flag); /* hopeless so get out */
182 }
183 
184 /*@C
185    PetscEnd - Calls `PetscFinalize()` and then ends the program. This is useful if one
186      wishes a clean exit somewhere deep in the program.
187 
188    Collective on `PETSC_COMM_WORLD`
189 
190    Options Database Keys are the same as for `PetscFinalize()`
191 
192    Level: advanced
193 
194    Note:
195    See `PetscInitialize()` for more general runtime options.
196 
197 .seealso: `PetscInitialize()`, `PetscOptionsView()`, `PetscMallocDump()`, `PetscMPIDump()`, `PetscFinalize()`
198 @*/
199 PetscErrorCode PetscEnd(void)
200 {
201   PetscFunctionBegin;
202   PetscFinalize();
203   exit(0);
204   return 0;
205 }
206 
207 PetscBool                   PetscOptionsPublish = PETSC_FALSE;
208 PETSC_INTERN PetscErrorCode PetscSetUseHBWMalloc_Private(void);
209 PETSC_INTERN PetscBool      petscsetmallocvisited;
210 static char                 emacsmachinename[256];
211 
212 PetscErrorCode (*PetscExternalVersionFunction)(MPI_Comm) = NULL;
213 PetscErrorCode (*PetscExternalHelpFunction)(MPI_Comm)    = NULL;
214 
215 #if PetscDefined(USE_LOG)
216   #include <petscviewer.h>
217 #endif
218 
219 /*@C
220    PetscSetHelpVersionFunctions - Sets functions that print help and version information
221    before the PETSc help and version information is printed. Must call BEFORE `PetscInitialize()`.
222    This routine enables a "higher-level" package that uses PETSc to print its messages first.
223 
224    Input Parameters:
225 +  help - the help function (may be NULL)
226 -  version - the version function (may be NULL)
227 
228    Level: developer
229 
230 @*/
231 PetscErrorCode PetscSetHelpVersionFunctions(PetscErrorCode (*help)(MPI_Comm), PetscErrorCode (*version)(MPI_Comm))
232 {
233   PetscFunctionBegin;
234   PetscExternalHelpFunction    = help;
235   PetscExternalVersionFunction = version;
236   PetscFunctionReturn(0);
237 }
238 
239 #if defined(PETSC_USE_LOG)
240 PETSC_INTERN PetscBool PetscObjectsLog;
241 #endif
242 
243 PETSC_INTERN PetscErrorCode PetscOptionsCheckInitial_Private(const char help[])
244 {
245   char        string[64];
246   MPI_Comm    comm = PETSC_COMM_WORLD;
247   PetscBool   flg1 = PETSC_FALSE, flg2 = PETSC_FALSE, flg3 = PETSC_FALSE, flag, hasHelp;
248   PetscReal   si;
249   PetscInt    intensity;
250   int         i;
251   PetscMPIInt rank;
252   char        version[256];
253 #if defined(PETSC_USE_LOG)
254   char              mname[PETSC_MAX_PATH_LEN];
255   PetscViewerFormat format;
256   PetscBool         flg4 = PETSC_FALSE;
257 #endif
258 
259   PetscFunctionBegin;
260   PetscCallMPI(MPI_Comm_rank(comm, &rank));
261 
262   if (PetscDefined(USE_DEBUG) && !PetscDefined(HAVE_THREADSAFETY)) PetscCall(PetscStackSetCheck(PETSC_TRUE));
263   PetscCall(PetscOptionsGetBool(NULL, NULL, "-checkfunctionlist", &PetscPrintFunctionList, NULL));
264 
265 #if !defined(PETSC_HAVE_THREADSAFETY)
266   if (!(PETSC_RUNNING_ON_VALGRIND)) {
267     /*
268       Setup the memory management; support for tracing malloc() usage
269     */
270     PetscBool mdebug = PETSC_FALSE, eachcall = PETSC_FALSE, initializenan = PETSC_FALSE, mlog = PETSC_FALSE;
271 
272     if (PetscDefined(USE_DEBUG)) {
273       mdebug        = PETSC_TRUE;
274       initializenan = PETSC_TRUE;
275       PetscCall(PetscOptionsHasName(NULL, NULL, "-malloc_test", &flg1));
276     } else {
277       /* don't warn about unused option */
278       PetscCall(PetscOptionsHasName(NULL, NULL, "-malloc_test", &flg1));
279       flg1 = PETSC_FALSE;
280     }
281     PetscCall(PetscOptionsGetBool(NULL, NULL, "-malloc_debug", &flg2, &flg3));
282     if (flg1 || flg2) {
283       mdebug        = PETSC_TRUE;
284       eachcall      = PETSC_TRUE;
285       initializenan = PETSC_TRUE;
286     } else if (flg3 && !flg2) {
287       mdebug        = PETSC_FALSE;
288       eachcall      = PETSC_FALSE;
289       initializenan = PETSC_FALSE;
290     }
291 
292     PetscCall(PetscOptionsGetBool(NULL, NULL, "-malloc_requested_size", &flg1, &flg2));
293     if (flg2) PetscCall(PetscMallocLogRequestedSizeSet(flg1));
294 
295     PetscCall(PetscOptionsHasName(NULL, NULL, "-malloc_view", &mlog));
296     if (mlog) mdebug = PETSC_TRUE;
297     /* the next line is deprecated */
298     PetscCall(PetscOptionsGetBool(NULL, NULL, "-malloc", &mdebug, NULL));
299     PetscCall(PetscOptionsGetBool(NULL, NULL, "-malloc_dump", &mdebug, NULL));
300     PetscCall(PetscOptionsGetBool(NULL, NULL, "-log_view_memory", &mdebug, NULL));
301     if (mdebug) PetscCall(PetscMallocSetDebug(eachcall, initializenan));
302     if (mlog) {
303       PetscReal logthreshold = 0;
304       PetscCall(PetscOptionsGetReal(NULL, NULL, "-malloc_view_threshold", &logthreshold, NULL));
305       PetscCall(PetscMallocViewSet(logthreshold));
306     }
307   #if defined(PETSC_USE_LOG)
308     PetscCall(PetscOptionsGetBool(NULL, NULL, "-log_view_memory", &PetscLogMemory, NULL));
309   #endif
310   }
311 
312   PetscCall(PetscOptionsGetBool(NULL, NULL, "-malloc_coalesce", &flg1, &flg2));
313   if (flg2) PetscCall(PetscMallocSetCoalesce(flg1));
314   flg1 = PETSC_FALSE;
315   PetscCall(PetscOptionsGetBool(NULL, NULL, "-malloc_hbw", &flg1, NULL));
316   /* ignore this option if malloc is already set */
317   if (flg1 && !petscsetmallocvisited) PetscCall(PetscSetUseHBWMalloc_Private());
318 
319   flg1 = PETSC_FALSE;
320   PetscCall(PetscOptionsGetBool(NULL, NULL, "-malloc_info", &flg1, NULL));
321   if (!flg1) {
322     flg1 = PETSC_FALSE;
323     PetscCall(PetscOptionsGetBool(NULL, NULL, "-memory_view", &flg1, NULL));
324   }
325   if (flg1) PetscCall(PetscMemorySetGetMaximumUsage());
326 #endif
327 
328 #if defined(PETSC_USE_LOG)
329   PetscCall(PetscOptionsHasName(NULL, NULL, "-objects_dump", &PetscObjectsLog));
330 #endif
331 
332   /*
333       Set the display variable for graphics
334   */
335   PetscCall(PetscSetDisplay());
336 
337   /*
338      Print main application help message
339   */
340   PetscCall(PetscOptionsHasHelp(NULL, &hasHelp));
341   if (help && hasHelp) {
342     PetscCall(PetscPrintf(comm, "%s", help));
343     PetscCall(PetscPrintf(comm, "----------------------------------------\n"));
344   }
345 
346   /*
347       Print the PETSc version information
348   */
349   PetscCall(PetscOptionsHasName(NULL, NULL, "-version", &flg1));
350   if (flg1 || hasHelp) {
351     /*
352        Print "higher-level" package version message
353     */
354     if (PetscExternalVersionFunction) PetscCall((*PetscExternalVersionFunction)(comm));
355 
356     PetscCall(PetscGetVersion(version, 256));
357     PetscCall((*PetscHelpPrintf)(comm, "%s\n", version));
358     PetscCall((*PetscHelpPrintf)(comm, "%s", PETSC_AUTHOR_INFO));
359     PetscCall((*PetscHelpPrintf)(comm, "See docs/changes/index.html for recent updates.\n"));
360     PetscCall((*PetscHelpPrintf)(comm, "See docs/faq.html for problems.\n"));
361     PetscCall((*PetscHelpPrintf)(comm, "See docs/manualpages/index.html for help. \n"));
362     PetscCall((*PetscHelpPrintf)(comm, "Libraries linked from %s\n", PETSC_LIB_DIR));
363     PetscCall((*PetscHelpPrintf)(comm, "----------------------------------------\n"));
364   }
365 
366   /*
367        Print "higher-level" package help message
368   */
369   if (hasHelp) {
370     PetscBool hasHelpIntro;
371 
372     if (PetscExternalHelpFunction) PetscCall((*PetscExternalHelpFunction)(comm));
373     PetscCall(PetscOptionsHasHelpIntro_Internal(NULL, &hasHelpIntro));
374     if (hasHelpIntro) {
375       PetscCall(PetscOptionsDestroyDefault());
376       PetscCall(PetscFreeMPIResources());
377       PetscCallMPI(MPI_Finalize());
378       exit(0);
379     }
380   }
381 
382   /*
383       Setup the error handling
384   */
385   flg1 = PETSC_FALSE;
386   PetscCall(PetscOptionsGetBool(NULL, NULL, "-on_error_abort", &flg1, NULL));
387   if (flg1) {
388     PetscCallMPI(MPI_Comm_set_errhandler(comm, MPI_ERRORS_ARE_FATAL));
389     PetscCall(PetscPushErrorHandler(PetscAbortErrorHandler, NULL));
390   }
391   flg1 = PETSC_FALSE;
392   PetscCall(PetscOptionsGetBool(NULL, NULL, "-on_error_mpiabort", &flg1, NULL));
393   if (flg1) PetscCall(PetscPushErrorHandler(PetscMPIAbortErrorHandler, NULL));
394   flg1 = PETSC_FALSE;
395   PetscCall(PetscOptionsGetBool(NULL, NULL, "-mpi_return_on_error", &flg1, NULL));
396   if (flg1) PetscCallMPI(MPI_Comm_set_errhandler(comm, MPI_ERRORS_RETURN));
397   flg1 = PETSC_FALSE;
398   PetscCall(PetscOptionsGetBool(NULL, NULL, "-no_signal_handler", &flg1, NULL));
399   if (!flg1) PetscCall(PetscPushSignalHandler(PetscSignalHandlerDefault, (void *)0));
400 
401   /*
402       Setup debugger information
403   */
404   PetscCall(PetscSetDefaultDebugger());
405   PetscCall(PetscOptionsGetString(NULL, NULL, "-on_error_attach_debugger", string, sizeof(string), &flg1));
406   if (flg1) {
407     MPI_Errhandler err_handler;
408 
409     PetscCall(PetscSetDebuggerFromString(string));
410     PetscCallMPI(MPI_Comm_create_errhandler(Petsc_MPI_DebuggerOnError, &err_handler));
411     PetscCallMPI(MPI_Comm_set_errhandler(comm, err_handler));
412     PetscCall(PetscPushErrorHandler(PetscAttachDebuggerErrorHandler, NULL));
413   }
414   PetscCall(PetscOptionsGetString(NULL, NULL, "-debug_terminal", string, sizeof(string), &flg1));
415   if (flg1) PetscCall(PetscSetDebugTerminal(string));
416   PetscCall(PetscOptionsGetString(NULL, NULL, "-start_in_debugger", string, sizeof(string), &flg1));
417   PetscCall(PetscOptionsGetString(NULL, NULL, "-stop_for_debugger", string, sizeof(string), &flg2));
418   if (flg1 || flg2) {
419     PetscMPIInt    size;
420     PetscInt       lsize, *ranks;
421     MPI_Errhandler err_handler;
422     /*
423        we have to make sure that all processors have opened
424        connections to all other processors, otherwise once the
425        debugger has stated it is likely to receive a SIGUSR1
426        and kill the program.
427     */
428     PetscCallMPI(MPI_Comm_size(comm, &size));
429     if (size > 2) {
430       PetscMPIInt dummy = 0;
431       MPI_Status  status;
432       for (i = 0; i < size; i++) {
433         if (rank != i) PetscCallMPI(MPI_Send(&dummy, 1, MPI_INT, i, 109, comm));
434       }
435       for (i = 0; i < size; i++) {
436         if (rank != i) PetscCallMPI(MPI_Recv(&dummy, 1, MPI_INT, i, 109, comm, &status));
437       }
438     }
439     /* check if this processor node should be in debugger */
440     PetscCall(PetscMalloc1(size, &ranks));
441     lsize = size;
442     /* Deprecated in 3.14 */
443     PetscCall(PetscOptionsGetIntArray(NULL, NULL, "-debugger_nodes", ranks, &lsize, &flag));
444     if (flag) {
445       const char *const quietopt = "-options_suppress_deprecated_warnings";
446       char              msg[4096];
447       PetscBool         quiet = PETSC_FALSE;
448 
449       PetscCall(PetscOptionsGetBool(NULL, NULL, quietopt, &quiet, NULL));
450       if (!quiet) {
451         PetscCall(PetscStrcpy(msg, "** PETSc DEPRECATION WARNING ** : the option "));
452         PetscCall(PetscStrcat(msg, "-debugger_nodes"));
453         PetscCall(PetscStrcat(msg, " is deprecated as of version "));
454         PetscCall(PetscStrcat(msg, "3.14"));
455         PetscCall(PetscStrcat(msg, " and will be removed in a future release."));
456         PetscCall(PetscStrcat(msg, " Please use the option "));
457         PetscCall(PetscStrcat(msg, "-debugger_ranks"));
458         PetscCall(PetscStrcat(msg, " instead."));
459         PetscCall(PetscStrcat(msg, " (Silence this warning with "));
460         PetscCall(PetscStrcat(msg, quietopt));
461         PetscCall(PetscStrcat(msg, ")\n"));
462         PetscCall(PetscPrintf(comm, "%s", msg));
463       }
464     } else {
465       lsize = size;
466       PetscCall(PetscOptionsGetIntArray(NULL, NULL, "-debugger_ranks", ranks, &lsize, &flag));
467     }
468     if (flag) {
469       for (i = 0; i < lsize; i++) {
470         if (ranks[i] == rank) {
471           flag = PETSC_FALSE;
472           break;
473         }
474       }
475     }
476     if (!flag) {
477       PetscCall(PetscSetDebuggerFromString(string));
478       PetscCall(PetscPushErrorHandler(PetscAbortErrorHandler, NULL));
479       if (flg1) {
480         PetscCall(PetscAttachDebugger());
481       } else {
482         PetscCall(PetscStopForDebugger());
483       }
484       PetscCallMPI(MPI_Comm_create_errhandler(Petsc_MPI_AbortOnError, &err_handler));
485       PetscCallMPI(MPI_Comm_set_errhandler(comm, err_handler));
486     } else {
487       PetscCall(PetscWaitOnError());
488     }
489     PetscCall(PetscFree(ranks));
490   }
491 
492   PetscCall(PetscOptionsGetString(NULL, NULL, "-on_error_emacs", emacsmachinename, sizeof(emacsmachinename), &flg1));
493   if (flg1 && rank == 0) PetscCall(PetscPushErrorHandler(PetscEmacsClientErrorHandler, emacsmachinename));
494 
495     /*
496         Setup profiling and logging
497   */
498 #if defined(PETSC_USE_INFO)
499   {
500     PetscCall(PetscInfoSetFromOptions(NULL));
501   }
502 #endif
503   PetscCall(PetscDetermineInitialFPTrap());
504   flg1 = PETSC_FALSE;
505   PetscCall(PetscOptionsGetBool(NULL, NULL, "-fp_trap", &flg1, &flag));
506   if (flag) PetscCall(PetscSetFPTrap(flg1 ? PETSC_FP_TRAP_ON : PETSC_FP_TRAP_OFF));
507   PetscCall(PetscOptionsGetInt(NULL, NULL, "-check_pointer_intensity", &intensity, &flag));
508   if (flag) PetscCall(PetscCheckPointerSetIntensity(intensity));
509 #if defined(PETSC_USE_LOG)
510   mname[0] = 0;
511   PetscCall(PetscOptionsGetString(NULL, NULL, "-history", mname, sizeof(mname), &flg1));
512   if (flg1) {
513     if (mname[0]) {
514       PetscCall(PetscOpenHistoryFile(mname, &petsc_history));
515     } else {
516       PetscCall(PetscOpenHistoryFile(NULL, &petsc_history));
517     }
518   }
519 
520   PetscCall(PetscOptionsGetBool(NULL, NULL, "-log_sync", &PetscLogSyncOn, NULL));
521 
522   #if defined(PETSC_HAVE_MPE)
523   flg1 = PETSC_FALSE;
524   PetscCall(PetscOptionsHasName(NULL, NULL, "-log_mpe", &flg1));
525   if (flg1) PetscCall(PetscLogMPEBegin());
526   #endif
527   flg1 = PETSC_FALSE;
528   flg3 = PETSC_FALSE;
529   PetscCall(PetscOptionsGetBool(NULL, NULL, "-log_all", &flg1, NULL));
530   PetscCall(PetscOptionsHasName(NULL, NULL, "-log_summary", &flg3));
531   if (flg1) PetscCall(PetscLogAllBegin());
532   else if (flg3) PetscCall(PetscLogDefaultBegin());
533 
534   PetscCall(PetscOptionsGetString(NULL, NULL, "-log_trace", mname, sizeof(mname), &flg1));
535   if (flg1) {
536     char  name[PETSC_MAX_PATH_LEN], fname[PETSC_MAX_PATH_LEN];
537     FILE *file;
538     if (mname[0]) {
539       PetscSNPrintf(name, PETSC_MAX_PATH_LEN, "%s.%d", mname, rank);
540       PetscCall(PetscFixFilename(name, fname));
541       file = fopen(fname, "w");
542       PetscCheck(file, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to open trace file: %s", fname);
543     } else file = PETSC_STDOUT;
544     PetscCall(PetscLogTraceBegin(file));
545   }
546 
547   PetscCall(PetscOptionsGetViewer(comm, NULL, NULL, "-log_view", NULL, &format, &flg4));
548   if (flg4) {
549     if (format == PETSC_VIEWER_ASCII_XML || format == PETSC_VIEWER_ASCII_FLAMEGRAPH) {
550       PetscCall(PetscLogNestedBegin());
551     } else {
552       PetscCall(PetscLogDefaultBegin());
553     }
554   }
555   if (flg4 && (format == PETSC_VIEWER_ASCII_XML || format == PETSC_VIEWER_ASCII_FLAMEGRAPH)) {
556     PetscReal threshold = PetscRealConstant(0.01);
557     PetscCall(PetscOptionsGetReal(NULL, NULL, "-log_threshold", &threshold, &flg1));
558     if (flg1) PetscCall(PetscLogSetThreshold((PetscLogDouble)threshold, NULL));
559   }
560 #endif
561 
562   PetscCall(PetscOptionsGetBool(NULL, NULL, "-saws_options", &PetscOptionsPublish, NULL));
563   PetscCall(PetscOptionsGetBool(NULL, NULL, "-use_gpu_aware_mpi", &use_gpu_aware_mpi, NULL));
564 
565   /*
566        Print basic help message
567   */
568   if (hasHelp) {
569     PetscCall((*PetscHelpPrintf)(comm, "Options for all PETSc programs:\n"));
570     PetscCall((*PetscHelpPrintf)(comm, " -version: prints PETSc version\n"));
571     PetscCall((*PetscHelpPrintf)(comm, " -help intro: prints example description and PETSc version, and exits\n"));
572     PetscCall((*PetscHelpPrintf)(comm, " -help: prints example description, PETSc version, and available options for used routines\n"));
573     PetscCall((*PetscHelpPrintf)(comm, " -on_error_abort: cause an abort when an error is detected. Useful \n "));
574     PetscCall((*PetscHelpPrintf)(comm, "       only when run in the debugger\n"));
575     PetscCall((*PetscHelpPrintf)(comm, " -on_error_attach_debugger [gdb,dbx,xxgdb,ups,noxterm]\n"));
576     PetscCall((*PetscHelpPrintf)(comm, "       start the debugger in new xterm\n"));
577     PetscCall((*PetscHelpPrintf)(comm, "       unless noxterm is given\n"));
578     PetscCall((*PetscHelpPrintf)(comm, " -start_in_debugger [gdb,dbx,xxgdb,ups,noxterm]\n"));
579     PetscCall((*PetscHelpPrintf)(comm, "       start all processes in the debugger\n"));
580     PetscCall((*PetscHelpPrintf)(comm, " -on_error_emacs <machinename>\n"));
581     PetscCall((*PetscHelpPrintf)(comm, "    emacs jumps to error file\n"));
582     PetscCall((*PetscHelpPrintf)(comm, " -debugger_ranks [n1,n2,..] Ranks to start in debugger\n"));
583     PetscCall((*PetscHelpPrintf)(comm, " -debugger_pause [m] : delay (in seconds) to attach debugger\n"));
584     PetscCall((*PetscHelpPrintf)(comm, " -stop_for_debugger : prints message on how to attach debugger manually\n"));
585     PetscCall((*PetscHelpPrintf)(comm, "                      waits the delay for you to attach\n"));
586     PetscCall((*PetscHelpPrintf)(comm, " -display display: Location where X window graphics and debuggers are displayed\n"));
587     PetscCall((*PetscHelpPrintf)(comm, " -no_signal_handler: do not trap error signals\n"));
588     PetscCall((*PetscHelpPrintf)(comm, " -mpi_return_on_error: MPI returns error code, rather than abort on internal error\n"));
589     PetscCall((*PetscHelpPrintf)(comm, " -fp_trap: stop on floating point exceptions\n"));
590     PetscCall((*PetscHelpPrintf)(comm, "           note on IBM RS6000 this slows run greatly\n"));
591     PetscCall((*PetscHelpPrintf)(comm, " -malloc_dump <optional filename>: dump list of unfreed memory at conclusion\n"));
592     PetscCall((*PetscHelpPrintf)(comm, " -malloc: use PETSc error checking malloc (deprecated, use -malloc_debug)\n"));
593     PetscCall((*PetscHelpPrintf)(comm, " -malloc no: don't use PETSc error checking malloc (deprecated, use -malloc_debug no)\n"));
594     PetscCall((*PetscHelpPrintf)(comm, " -malloc_info: prints total memory usage\n"));
595     PetscCall((*PetscHelpPrintf)(comm, " -malloc_view <optional filename>: keeps log of all memory allocations, displays in PetscFinalize()\n"));
596     PetscCall((*PetscHelpPrintf)(comm, " -malloc_debug <true or false>: enables or disables extended checking for memory corruption\n"));
597     PetscCall((*PetscHelpPrintf)(comm, " -options_view: dump list of options inputted\n"));
598     PetscCall((*PetscHelpPrintf)(comm, " -options_left: dump list of unused options\n"));
599     PetscCall((*PetscHelpPrintf)(comm, " -options_left no: don't dump list of unused options\n"));
600     PetscCall((*PetscHelpPrintf)(comm, " -tmp tmpdir: alternative /tmp directory\n"));
601     PetscCall((*PetscHelpPrintf)(comm, " -shared_tmp: tmp directory is shared by all processors\n"));
602     PetscCall((*PetscHelpPrintf)(comm, " -not_shared_tmp: each processor has separate tmp directory\n"));
603     PetscCall((*PetscHelpPrintf)(comm, " -memory_view: print memory usage at end of run\n"));
604 #if defined(PETSC_USE_LOG)
605     PetscCall((*PetscHelpPrintf)(comm, " -get_total_flops: total flops over all processors\n"));
606     PetscCall((*PetscHelpPrintf)(comm, " -log_view [:filename:[format]]: logging objects and events\n"));
607     PetscCall((*PetscHelpPrintf)(comm, " -log_trace [filename]: prints trace of all PETSc calls\n"));
608     PetscCall((*PetscHelpPrintf)(comm, " -log_exclude <list,of,classnames>: exclude given classes from logging\n"));
609   #if defined(PETSC_HAVE_DEVICE)
610     PetscCall((*PetscHelpPrintf)(comm, " -log_view_gpu_time: log the GPU time for each and event\n"));
611   #endif
612   #if defined(PETSC_HAVE_MPE)
613     PetscCall((*PetscHelpPrintf)(comm, " -log_mpe: Also create logfile viewable through Jumpshot\n"));
614   #endif
615 #endif
616 #if defined(PETSC_USE_INFO)
617     PetscCall((*PetscHelpPrintf)(comm, " -info [filename][:[~]<list,of,classnames>[:[~]self]]: print verbose information\n"));
618 #endif
619     PetscCall((*PetscHelpPrintf)(comm, " -options_file <file>: reads options from file\n"));
620     PetscCall((*PetscHelpPrintf)(comm, " -options_monitor: monitor options to standard output, including that set previously e.g. in option files\n"));
621     PetscCall((*PetscHelpPrintf)(comm, " -options_monitor_cancel: cancels all hardwired option monitors\n"));
622     PetscCall((*PetscHelpPrintf)(comm, " -petsc_sleep n: sleeps n seconds before running program\n"));
623   }
624 
625 #if defined(PETSC_HAVE_POPEN)
626   {
627     char machine[128];
628     PetscCall(PetscOptionsGetString(NULL, NULL, "-popen_machine", machine, sizeof(machine), &flg1));
629     if (flg1) PetscCall(PetscPOpenSetMachine(machine));
630   }
631 #endif
632 
633   PetscCall(PetscOptionsGetReal(NULL, NULL, "-petsc_sleep", &si, &flg1));
634   if (flg1) PetscCall(PetscSleep(si));
635   PetscFunctionReturn(0);
636 }
637