xref: /petsc/src/sys/objects/init.c (revision b665b14e20d08dc58a3f47e0addbfcd5129cdb60)
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_UNISTD_H)
11   #include <unistd.h>
12 #endif
13 
14 /* ------------------------Nasty global variables -------------------------------*/
15 /*
16      Indicates if PETSc started up MPI, or it was
17    already started before PETSc was initialized.
18 */
19 PetscBool PetscBeganMPI                 = PETSC_FALSE;
20 PetscBool PetscErrorHandlingInitialized = PETSC_FALSE;
21 PetscBool PetscInitializeCalled         = PETSC_FALSE;
22 PetscBool PetscFinalizeCalled           = PETSC_FALSE;
23 
24 PetscMPIInt PetscGlobalRank = -1;
25 PetscMPIInt PetscGlobalSize = -1;
26 
27 #if defined(PETSC_HAVE_KOKKOS)
28 PetscBool PetscBeganKokkos = PETSC_FALSE;
29 #endif
30 
31 #if defined(PETSC_HAVE_NVSHMEM)
32 PetscBool PetscBeganNvshmem       = PETSC_FALSE;
33 PetscBool PetscNvshmemInitialized = PETSC_FALSE;
34 #endif
35 
36 PetscBool use_gpu_aware_mpi = PetscDefined(HAVE_MPIUNI) ? PETSC_FALSE : PETSC_TRUE;
37 
38 PetscBool PetscPrintFunctionList = PETSC_FALSE;
39 
40 #if defined(PETSC_HAVE_COMPLEX)
41   #if defined(PETSC_COMPLEX_INSTANTIATE)
42 template <>
43 class std::complex<double>; /* instantiate complex template class */
44   #endif
45 
46 /*MC
47    PETSC_i - the imaginary number i
48 
49    Synopsis:
50    #include <petscsys.h>
51    PetscComplex PETSC_i;
52 
53    Level: beginner
54 
55    Note:
56    Complex numbers are automatically available if PETSc located a working complex implementation
57 
58 .seealso: `PetscRealPart()`, `PetscImaginaryPart()`, `PetscRealPartComplex()`, `PetscImaginaryPartComplex()`
59 M*/
60 PetscComplex PETSC_i;
61 MPI_Datatype MPIU___COMPLEX128 = 0;
62 #endif /* PETSC_HAVE_COMPLEX */
63 #if defined(PETSC_HAVE_REAL___FLOAT128)
64 MPI_Datatype MPIU___FLOAT128 = 0;
65 #endif
66 #if defined(PETSC_HAVE_REAL___FP16)
67 MPI_Datatype MPIU___FP16 = 0;
68 #endif
69 MPI_Datatype MPIU_2SCALAR    = 0;
70 MPI_Datatype MPIU_REAL_INT   = 0;
71 MPI_Datatype MPIU_SCALAR_INT = 0;
72 #if defined(PETSC_USE_64BIT_INDICES)
73 MPI_Datatype MPIU_2INT = 0;
74 #endif
75 MPI_Datatype MPI_4INT  = 0;
76 MPI_Datatype MPIU_4INT = 0;
77 MPI_Datatype MPIU_BOOL;
78 MPI_Datatype MPIU_ENUM;
79 MPI_Datatype MPIU_FORTRANADDR;
80 MPI_Datatype MPIU_SIZE_T;
81 
82 /*
83        Function that is called to display all error messages
84 */
85 PetscErrorCode (*PetscErrorPrintf)(const char[], ...)          = PetscErrorPrintfDefault;
86 PetscErrorCode (*PetscHelpPrintf)(MPI_Comm, const char[], ...) = PetscHelpPrintfDefault;
87 PetscErrorCode (*PetscVFPrintf)(FILE *, const char[], va_list) = PetscVFPrintfDefault;
88 
89 /*
90    Optional file where all PETSc output from various prints is saved
91 */
92 PETSC_INTERN FILE *petsc_history;
93 FILE              *petsc_history = NULL;
94 
95 PetscErrorCode PetscOpenHistoryFile(const char filename[], FILE **fd)
96 {
97   PetscMPIInt rank, size;
98   char        pfile[PETSC_MAX_PATH_LEN], pname[PETSC_MAX_PATH_LEN], fname[PETSC_MAX_PATH_LEN], date[64];
99   char        version[256];
100 
101   PetscFunctionBegin;
102   PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank));
103   if (rank == 0) {
104     char arch[10];
105 
106     PetscCall(PetscGetArchType(arch, 10));
107     PetscCall(PetscGetDate(date, 64));
108     PetscCall(PetscGetVersion(version, 256));
109     PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size));
110     if (filename) {
111       PetscCall(PetscFixFilename(filename, fname));
112     } else {
113       PetscCall(PetscGetHomeDirectory(pfile, sizeof(pfile)));
114       PetscCall(PetscStrlcat(pfile, "/.petschistory", sizeof(pfile)));
115       PetscCall(PetscFixFilename(pfile, fname));
116     }
117 
118     *fd = fopen(fname, "a");
119     PetscCheck(fd, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Cannot open file: %s", fname);
120 
121     PetscCall(PetscFPrintf(PETSC_COMM_SELF, *fd, "----------------------------------------\n"));
122     PetscCall(PetscFPrintf(PETSC_COMM_SELF, *fd, "%s %s\n", version, date));
123     PetscCall(PetscGetProgramName(pname, sizeof(pname)));
124     PetscCall(PetscFPrintf(PETSC_COMM_SELF, *fd, "%s on a %s, %d proc. with options:\n", pname, arch, size));
125     PetscCall(PetscFPrintf(PETSC_COMM_SELF, *fd, "----------------------------------------\n"));
126 
127     PetscCall(PetscFFlush(*fd));
128   }
129   PetscFunctionReturn(PETSC_SUCCESS);
130 }
131 
132 PETSC_INTERN PetscErrorCode PetscCloseHistoryFile(FILE **fd)
133 {
134   PetscMPIInt rank;
135 
136   PetscFunctionBegin;
137   PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank));
138   if (rank == 0) {
139     char date[64];
140     int  err;
141 
142     PetscCall(PetscGetDate(date, sizeof(date)));
143     PetscCall(PetscFPrintf(PETSC_COMM_SELF, *fd, "----------------------------------------\n"));
144     PetscCall(PetscFPrintf(PETSC_COMM_SELF, *fd, "Finished at %s\n", date));
145     PetscCall(PetscFPrintf(PETSC_COMM_SELF, *fd, "----------------------------------------\n"));
146     PetscCall(PetscFFlush(*fd));
147     err = fclose(*fd);
148     PetscCheck(!err, PETSC_COMM_SELF, PETSC_ERR_SYS, "fclose() failed on file");
149   }
150   PetscFunctionReturn(PETSC_SUCCESS);
151 }
152 
153 /*
154    This is ugly and probably belongs somewhere else, but I want to
155   be able to put a true MPI abort error handler with command line args.
156 
157     This is so MPI errors in the debugger will leave all the stack
158   frames. The default MP_Abort() cleans up and exits thus providing no useful information
159   in the debugger hence we call abort() instead of MPI_Abort().
160 */
161 
162 void Petsc_MPI_AbortOnError(PETSC_UNUSED MPI_Comm *comm, PetscMPIInt *flag, ...)
163 {
164   PetscFunctionBegin;
165   PetscCallContinue((*PetscErrorPrintf)("MPI error %d\n", *flag));
166   abort();
167 }
168 
169 void Petsc_MPI_DebuggerOnError(MPI_Comm *comm, PetscMPIInt *flag, ...)
170 {
171   PetscFunctionBegin;
172   PetscCallContinue((*PetscErrorPrintf)("MPI error %d\n", *flag));
173   if (PetscAttachDebugger()) PETSCABORT(*comm, (PetscErrorCode)*flag); /* hopeless so get out */
174 }
175 
176 /*@C
177   PetscEnd - Calls `PetscFinalize()` and then ends the program. This is useful if one
178   wishes a clean exit somewhere deep in the program.
179 
180   Collective on `PETSC_COMM_WORLD`
181 
182   Level: advanced
183 
184   Note:
185   See `PetscInitialize()` for more general runtime options.
186 
187 .seealso: `PetscInitialize()`, `PetscOptionsView()`, `PetscMallocDump()`, `PetscMPIDump()`, `PetscFinalize()`
188 @*/
189 PetscErrorCode PetscEnd(void)
190 {
191   PetscFunctionBegin;
192   PetscCall(PetscFinalize());
193   exit(0);
194   return PETSC_SUCCESS;
195 }
196 
197 PetscBool                   PetscOptionsPublish = PETSC_FALSE;
198 PETSC_INTERN PetscErrorCode PetscSetUseHBWMalloc_Private(void);
199 PETSC_INTERN PetscBool      petscsetmallocvisited;
200 static char                 emacsmachinename[256];
201 
202 PetscErrorCode (*PetscExternalVersionFunction)(MPI_Comm) = NULL;
203 PetscErrorCode (*PetscExternalHelpFunction)(MPI_Comm)    = NULL;
204 
205 #include <petscviewer.h>
206 
207 /*@C
208   PetscSetHelpVersionFunctions - Sets functions that print help and version information
209   before the PETSc help and version information is printed.
210 
211   Input Parameters:
212 + help    - the help function (may be `NULL`)
213 - version - the version function (may be `NULL`)
214 
215   Level: developer
216 
217   Notes:
218   Must call BEFORE `PetscInitialize()`.
219 
220   This routine enables a "higher-level" package that uses PETSc to print its messages first and
221   control how the PETSc help messages are printed.
222 
223 .seealso: `PetscInitialize()`
224 @*/
225 PetscErrorCode PetscSetHelpVersionFunctions(PetscErrorCode (*help)(MPI_Comm), PetscErrorCode (*version)(MPI_Comm))
226 {
227   PetscFunctionBegin;
228   PetscExternalHelpFunction    = help;
229   PetscExternalVersionFunction = version;
230   PetscFunctionReturn(PETSC_SUCCESS);
231 }
232 
233 PETSC_INTERN PetscBool PetscObjectsLog;
234 
235 PETSC_INTERN PetscErrorCode PetscOptionsCheckInitial_Private(const char help[])
236 {
237   char        string[64];
238   MPI_Comm    comm = PETSC_COMM_WORLD;
239   PetscBool   flg1 = PETSC_FALSE, flg2 = PETSC_FALSE, flag, hasHelp;
240   PetscBool   checkstack = PETSC_FALSE;
241   PetscReal   si;
242   PetscInt    intensity;
243   int         i;
244   PetscMPIInt rank;
245   char        version[256];
246 
247   PetscFunctionBegin;
248   PetscCallMPI(MPI_Comm_rank(comm, &rank));
249 
250   if (PetscDefined(USE_DEBUG) && !PetscDefined(HAVE_THREADSAFETY)) checkstack = PETSC_TRUE;
251   PetscCall(PetscOptionsGetBool(NULL, NULL, "-checkstack", &checkstack, NULL));
252   PetscCall(PetscStackSetCheck(checkstack));
253 
254   PetscCall(PetscOptionsGetBool(NULL, NULL, "-checkfunctionlist", &PetscPrintFunctionList, NULL));
255 
256 #if !defined(PETSC_HAVE_THREADSAFETY)
257   if (!(PETSC_RUNNING_ON_VALGRIND)) {
258     /*
259       Setup the memory management; support for tracing malloc() usage
260     */
261     PetscBool mdebug = PETSC_FALSE, eachcall = PETSC_FALSE, initializenan = PETSC_FALSE, mlog = PETSC_FALSE;
262     PetscBool flg3 = PETSC_FALSE;
263 
264     if (PetscDefined(USE_DEBUG)) {
265       mdebug        = PETSC_TRUE;
266       initializenan = PETSC_TRUE;
267       PetscCall(PetscOptionsHasName(NULL, NULL, "-malloc_test", &flg1));
268     } else {
269       /* don't warn about unused option */
270       PetscCall(PetscOptionsHasName(NULL, NULL, "-malloc_test", &flg1));
271       flg1 = PETSC_FALSE;
272     }
273     PetscCall(PetscOptionsGetBool(NULL, NULL, "-malloc_debug", &flg2, &flg3));
274     if (flg1 || flg2) {
275       mdebug        = PETSC_TRUE;
276       eachcall      = PETSC_TRUE;
277       initializenan = PETSC_TRUE;
278     } else if (flg3 && !flg2) {
279       mdebug        = PETSC_FALSE;
280       eachcall      = PETSC_FALSE;
281       initializenan = PETSC_FALSE;
282     }
283 
284     PetscCall(PetscOptionsGetBool(NULL, NULL, "-malloc_requested_size", &flg1, &flg2));
285     if (flg2) PetscCall(PetscMallocLogRequestedSizeSet(flg1));
286 
287     PetscCall(PetscOptionsHasName(NULL, NULL, "-malloc_view", &mlog));
288     if (mlog) mdebug = PETSC_TRUE;
289     /* the next line is deprecated */
290     PetscCall(PetscOptionsGetBool(NULL, NULL, "-malloc_dump", &mdebug, NULL));
291     PetscCall(PetscOptionsGetBool(NULL, NULL, "-log_view_memory", &mdebug, NULL));
292     if (mdebug) PetscCall(PetscMallocSetDebug(eachcall, initializenan));
293     if (mlog) {
294       PetscReal logthreshold = 0;
295       PetscCall(PetscOptionsGetReal(NULL, NULL, "-malloc_view_threshold", &logthreshold, NULL));
296       PetscCall(PetscMallocViewSet(logthreshold));
297     }
298     PetscCall(PetscOptionsGetBool(NULL, NULL, "-log_view_memory", &PetscLogMemory, NULL));
299   }
300 
301   PetscCall(PetscOptionsGetBool(NULL, NULL, "-malloc_coalesce", &flg1, &flg2));
302   if (flg2) PetscCall(PetscMallocSetCoalesce(flg1));
303   flg1 = PETSC_FALSE;
304   PetscCall(PetscOptionsGetBool(NULL, NULL, "-malloc_hbw", &flg1, NULL));
305   /* ignore this option if malloc is already set */
306   if (flg1 && !petscsetmallocvisited) PetscCall(PetscSetUseHBWMalloc_Private());
307 
308   flg1 = PETSC_FALSE;
309   PetscCall(PetscOptionsGetBool(NULL, NULL, "-memory_view", &flg1, NULL));
310   if (flg1) PetscCall(PetscMemorySetGetMaximumUsage());
311 #endif
312 
313   PetscCall(PetscOptionsHasName(NULL, NULL, "-objects_dump", &PetscObjectsLog));
314 
315   /*
316       Set the display variable for graphics
317   */
318   PetscCall(PetscSetDisplay());
319 
320   /*
321      Print main application help message
322   */
323   PetscCall(PetscOptionsHasHelp(NULL, &hasHelp));
324   if (help && hasHelp) {
325     PetscCall(PetscPrintf(comm, "%s", help));
326     PetscCall(PetscPrintf(comm, "----------------------------------------\n"));
327   }
328 
329   /*
330       Print the PETSc version information
331   */
332   PetscCall(PetscOptionsHasName(NULL, NULL, "-version", &flg1));
333   if (flg1 || hasHelp) {
334     /*
335        Print "higher-level" package version message
336     */
337     if (PetscExternalVersionFunction) PetscCall((*PetscExternalVersionFunction)(comm));
338 
339     PetscCall(PetscGetVersion(version, 256));
340     if (!PetscCIEnabledPortableErrorOutput) PetscCall((*PetscHelpPrintf)(comm, "%s\n", version));
341     PetscCall((*PetscHelpPrintf)(comm, "%s", PETSC_AUTHOR_INFO));
342     PetscCall((*PetscHelpPrintf)(comm, "See https://petsc.org/release/changes for recent updates.\n"));
343     PetscCall((*PetscHelpPrintf)(comm, "See https://petsc.org/release/faq for problems.\n"));
344     PetscCall((*PetscHelpPrintf)(comm, "See https://petsc.org/release/manualpages for help. \n"));
345     if (!PetscCIEnabledPortableErrorOutput) PetscCall((*PetscHelpPrintf)(comm, "Libraries linked from %s\n", PETSC_LIB_DIR));
346     PetscCall((*PetscHelpPrintf)(comm, "----------------------------------------\n"));
347   }
348 
349   /*
350        Print "higher-level" package help message
351   */
352   if (hasHelp) {
353     PetscBool hasHelpIntro;
354 
355     if (PetscExternalHelpFunction) PetscCall((*PetscExternalHelpFunction)(comm));
356     PetscCall(PetscOptionsHasHelpIntro_Internal(NULL, &hasHelpIntro));
357     if (hasHelpIntro) {
358       PetscCall(PetscOptionsDestroyDefault());
359       PetscCall(PetscFreeMPIResources());
360       PetscCallMPI(MPI_Finalize());
361       exit(0);
362     }
363   }
364 
365   /*
366       Setup the error handling
367   */
368   flg1 = PETSC_FALSE;
369   PetscCall(PetscOptionsGetBool(NULL, NULL, "-on_error_abort", &flg1, NULL));
370   if (flg1) {
371     PetscCallMPI(MPI_Comm_set_errhandler(comm, MPI_ERRORS_ARE_FATAL));
372     PetscCall(PetscPushErrorHandler(PetscAbortErrorHandler, NULL));
373   }
374   flg1 = PETSC_FALSE;
375   PetscCall(PetscOptionsGetBool(NULL, NULL, "-on_error_mpiabort", &flg1, NULL));
376   if (flg1) PetscCall(PetscPushErrorHandler(PetscMPIAbortErrorHandler, NULL));
377   flg1 = PETSC_FALSE;
378   PetscCall(PetscOptionsGetBool(NULL, NULL, "-mpi_return_on_error", &flg1, NULL));
379   if (flg1) PetscCallMPI(MPI_Comm_set_errhandler(comm, MPI_ERRORS_RETURN));
380   flg1 = PETSC_FALSE;
381   PetscCall(PetscOptionsGetBool(NULL, NULL, "-no_signal_handler", &flg1, NULL));
382   if (!flg1) PetscCall(PetscPushSignalHandler(PetscSignalHandlerDefault, (void *)0));
383 
384   /*
385       Setup debugger information
386   */
387   PetscCall(PetscSetDefaultDebugger());
388   PetscCall(PetscOptionsGetString(NULL, NULL, "-on_error_attach_debugger", string, sizeof(string), &flg1));
389   if (flg1) {
390     MPI_Errhandler err_handler;
391 
392     PetscCall(PetscSetDebuggerFromString(string));
393     PetscCallMPI(MPI_Comm_create_errhandler(Petsc_MPI_DebuggerOnError, &err_handler));
394     PetscCallMPI(MPI_Comm_set_errhandler(comm, err_handler));
395     PetscCall(PetscPushErrorHandler(PetscAttachDebuggerErrorHandler, NULL));
396   }
397   PetscCall(PetscOptionsGetString(NULL, NULL, "-debug_terminal", string, sizeof(string), &flg1));
398   if (flg1) PetscCall(PetscSetDebugTerminal(string));
399   PetscCall(PetscOptionsGetString(NULL, NULL, "-start_in_debugger", string, sizeof(string), &flg1));
400   PetscCall(PetscOptionsGetString(NULL, NULL, "-stop_for_debugger", string, sizeof(string), &flg2));
401   if (flg1 || flg2) {
402     PetscMPIInt    size;
403     PetscInt       lsize, *ranks;
404     MPI_Errhandler err_handler;
405     /*
406        we have to make sure that all processors have opened
407        connections to all other processors, otherwise once the
408        debugger has stated it is likely to receive a SIGUSR1
409        and kill the program.
410     */
411     PetscCallMPI(MPI_Comm_size(comm, &size));
412     if (size > 2) {
413       PetscMPIInt dummy = 0;
414       MPI_Status  status;
415       for (i = 0; i < size; i++) {
416         if (rank != i) PetscCallMPI(MPI_Send(&dummy, 1, MPI_INT, i, 109, comm));
417       }
418       for (i = 0; i < size; i++) {
419         if (rank != i) PetscCallMPI(MPI_Recv(&dummy, 1, MPI_INT, i, 109, comm, &status));
420       }
421     }
422     /* check if this processor node should be in debugger */
423     PetscCall(PetscMalloc1(size, &ranks));
424     lsize = size;
425     /* Deprecated in 3.14 */
426     PetscCall(PetscOptionsGetIntArray(NULL, NULL, "-debugger_nodes", ranks, &lsize, &flag));
427     if (flag) {
428       const char *const quietopt = "-options_suppress_deprecated_warnings";
429       char              msg[4096];
430       PetscBool         quiet = PETSC_FALSE;
431 
432       PetscCall(PetscOptionsGetBool(NULL, NULL, quietopt, &quiet, NULL));
433       if (!quiet) {
434         PetscCall(PetscStrncpy(msg, "** PETSc DEPRECATION WARNING ** : the option ", sizeof(msg)));
435         PetscCall(PetscStrlcat(msg, "-debugger_nodes", sizeof(msg)));
436         PetscCall(PetscStrlcat(msg, " is deprecated as of version ", sizeof(msg)));
437         PetscCall(PetscStrlcat(msg, "3.14", sizeof(msg)));
438         PetscCall(PetscStrlcat(msg, " and will be removed in a future release.", sizeof(msg)));
439         PetscCall(PetscStrlcat(msg, " Please use the option ", sizeof(msg)));
440         PetscCall(PetscStrlcat(msg, "-debugger_ranks", sizeof(msg)));
441         PetscCall(PetscStrlcat(msg, " instead.", sizeof(msg)));
442         PetscCall(PetscStrlcat(msg, " (Silence this warning with ", sizeof(msg)));
443         PetscCall(PetscStrlcat(msg, quietopt, sizeof(msg)));
444         PetscCall(PetscStrlcat(msg, ")\n", sizeof(msg)));
445         PetscCall(PetscPrintf(comm, "%s", msg));
446       }
447     } else {
448       lsize = size;
449       PetscCall(PetscOptionsGetIntArray(NULL, NULL, "-debugger_ranks", ranks, &lsize, &flag));
450     }
451     if (flag) {
452       for (i = 0; i < lsize; i++) {
453         if (ranks[i] == rank) {
454           flag = PETSC_FALSE;
455           break;
456         }
457       }
458     }
459     if (!flag) {
460       PetscCall(PetscSetDebuggerFromString(string));
461       PetscCall(PetscPushErrorHandler(PetscAbortErrorHandler, NULL));
462       if (flg1) {
463         PetscCall(PetscAttachDebugger());
464       } else {
465         PetscCall(PetscStopForDebugger());
466       }
467       PetscCallMPI(MPI_Comm_create_errhandler(Petsc_MPI_AbortOnError, &err_handler));
468       PetscCallMPI(MPI_Comm_set_errhandler(comm, err_handler));
469     } else {
470       PetscCall(PetscWaitOnError());
471     }
472     PetscCall(PetscFree(ranks));
473   }
474 
475   PetscCall(PetscOptionsGetString(NULL, NULL, "-on_error_emacs", emacsmachinename, sizeof(emacsmachinename), &flg1));
476   if (flg1 && rank == 0) PetscCall(PetscPushErrorHandler(PetscEmacsClientErrorHandler, emacsmachinename));
477 
478   /*
479         Setup profiling and logging
480   */
481   if (PetscDefined(USE_LOG)) { PetscCall(PetscInfoSetFromOptions(NULL)); }
482   PetscCall(PetscDetermineInitialFPTrap());
483   flg1 = PETSC_FALSE;
484   PetscCall(PetscOptionsGetBool(NULL, NULL, "-fp_trap", &flg1, &flag));
485   if (flag) PetscCall(PetscSetFPTrap(flg1 ? PETSC_FP_TRAP_ON : PETSC_FP_TRAP_OFF));
486   PetscCall(PetscOptionsGetInt(NULL, NULL, "-check_pointer_intensity", &intensity, &flag));
487   if (flag) PetscCall(PetscCheckPointerSetIntensity(intensity));
488   if (PetscDefined(USE_LOG)) {
489     char              mname[PETSC_MAX_PATH_LEN];
490     PetscViewerFormat format;
491     PetscBool         flg4 = PETSC_FALSE;
492 
493     mname[0] = 0;
494     PetscCall(PetscOptionsGetString(NULL, NULL, "-history", mname, sizeof(mname), &flg1));
495     if (flg1) {
496       if (mname[0]) {
497         PetscCall(PetscOpenHistoryFile(mname, &petsc_history));
498       } else {
499         PetscCall(PetscOpenHistoryFile(NULL, &petsc_history));
500       }
501     }
502 
503     PetscCall(PetscOptionsGetBool(NULL, NULL, "-log_sync", &PetscLogSyncOn, NULL));
504 
505     if (PetscDefined(HAVE_MPE)) {
506       flg1 = PETSC_FALSE;
507       PetscCall(PetscOptionsHasName(NULL, NULL, "-log_mpe", &flg1));
508       if (flg1) PetscCall(PetscLogMPEBegin());
509     }
510     if (PetscDefined(HAVE_TAU_PERFSTUBS)) {
511       flg1 = PETSC_FALSE;
512       PetscCall(PetscOptionsHasName(NULL, NULL, "-log_perfstubs", &flg1));
513       if (flg1) PetscCall(PetscLogPerfstubsBegin());
514     }
515     flg1 = PETSC_FALSE;
516     PetscCall(PetscOptionsGetBool(NULL, NULL, "-log_all", &flg1, NULL));
517     PetscCall(PetscOptionsGetBool(NULL, NULL, "-log", &flg2, NULL));
518     if (flg1 || flg2) PetscCall(PetscLogDefaultBegin());
519 
520     PetscCall(PetscOptionsGetString(NULL, NULL, "-log_trace", mname, sizeof(mname), &flg1));
521     if (flg1) {
522       char  name[PETSC_MAX_PATH_LEN], fname[PETSC_MAX_PATH_LEN];
523       FILE *file;
524       if (mname[0]) {
525         PetscCall(PetscSNPrintf(name, PETSC_MAX_PATH_LEN, "%s.%d", mname, rank));
526         PetscCall(PetscFixFilename(name, fname));
527         file = fopen(fname, "w");
528         PetscCheck(file, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to open trace file: %s", fname);
529       } else file = PETSC_STDOUT;
530       PetscCall(PetscLogTraceBegin(file));
531     }
532 
533     PetscCall(PetscOptionsGetViewer(comm, NULL, NULL, "-log_view", NULL, &format, &flg4));
534     if (flg4) {
535       if (format == PETSC_VIEWER_ASCII_XML || format == PETSC_VIEWER_ASCII_FLAMEGRAPH) {
536         PetscCall(PetscLogNestedBegin());
537       } else {
538         PetscCall(PetscLogDefaultBegin());
539       }
540     }
541     if (flg4 && (format == PETSC_VIEWER_ASCII_XML || format == PETSC_VIEWER_ASCII_FLAMEGRAPH)) {
542       PetscReal threshold = PetscRealConstant(0.01);
543       PetscCall(PetscOptionsGetReal(NULL, NULL, "-log_threshold", &threshold, &flg1));
544       if (flg1) PetscCall(PetscLogSetThreshold((PetscLogDouble)threshold, NULL));
545     }
546   }
547 
548   PetscCall(PetscOptionsGetBool(NULL, NULL, "-saws_options", &PetscOptionsPublish, NULL));
549   PetscCall(PetscOptionsGetBool(NULL, NULL, "-use_gpu_aware_mpi", &use_gpu_aware_mpi, &flg1));
550   if (!flg1) PetscCall(PetscOptionsGetBool(NULL, NULL, "-sf_use_gpu_aware_mpi", &use_gpu_aware_mpi, &flg1)); // an alias option
551 
552   /*
553        Print basic help message
554   */
555   if (hasHelp) {
556     PetscCall((*PetscHelpPrintf)(comm, "Options for all PETSc programs:\n"));
557     PetscCall((*PetscHelpPrintf)(comm, " -version: prints PETSc version\n"));
558     PetscCall((*PetscHelpPrintf)(comm, " -help intro: prints example description and PETSc version, and exits\n"));
559     PetscCall((*PetscHelpPrintf)(comm, " -help: prints example description, PETSc version, and available options for used routines\n"));
560     PetscCall((*PetscHelpPrintf)(comm, " -on_error_abort: cause an abort when an error is detected. Useful \n "));
561     PetscCall((*PetscHelpPrintf)(comm, "       only when run in the debugger\n"));
562     PetscCall((*PetscHelpPrintf)(comm, " -on_error_attach_debugger [gdb,dbx,xxgdb,ups,noxterm]\n"));
563     PetscCall((*PetscHelpPrintf)(comm, "       start the debugger in new xterm\n"));
564     PetscCall((*PetscHelpPrintf)(comm, "       unless noxterm is given\n"));
565     PetscCall((*PetscHelpPrintf)(comm, " -start_in_debugger [gdb,dbx,xxgdb,ups,noxterm]\n"));
566     PetscCall((*PetscHelpPrintf)(comm, "       start all processes in the debugger\n"));
567     PetscCall((*PetscHelpPrintf)(comm, " -on_error_emacs <machinename>\n"));
568     PetscCall((*PetscHelpPrintf)(comm, "    emacs jumps to error file\n"));
569     PetscCall((*PetscHelpPrintf)(comm, " -debugger_ranks [n1,n2,..] Ranks to start in debugger\n"));
570     PetscCall((*PetscHelpPrintf)(comm, " -debugger_pause [m] : delay (in seconds) to attach debugger\n"));
571     PetscCall((*PetscHelpPrintf)(comm, " -stop_for_debugger : prints message on how to attach debugger manually\n"));
572     PetscCall((*PetscHelpPrintf)(comm, "                      waits the delay for you to attach\n"));
573     PetscCall((*PetscHelpPrintf)(comm, " -display display: Location where X window graphics and debuggers are displayed\n"));
574     PetscCall((*PetscHelpPrintf)(comm, " -no_signal_handler: do not trap error signals\n"));
575     PetscCall((*PetscHelpPrintf)(comm, " -mpi_return_on_error: MPI returns error code, rather than abort on internal error\n"));
576     PetscCall((*PetscHelpPrintf)(comm, " -fp_trap: stop on floating point exceptions\n"));
577     PetscCall((*PetscHelpPrintf)(comm, "           note on IBM RS6000 this slows run greatly\n"));
578     PetscCall((*PetscHelpPrintf)(comm, " -malloc_dump <optional filename>: dump list of unfreed memory at conclusion\n"));
579     PetscCall((*PetscHelpPrintf)(comm, " -malloc_view <optional filename>: keeps log of all memory allocations, displays in PetscFinalize()\n"));
580     PetscCall((*PetscHelpPrintf)(comm, " -malloc_debug <true or false>: enables or disables extended checking for memory corruption\n"));
581     PetscCall((*PetscHelpPrintf)(comm, " -options_view: dump list of options inputted\n"));
582     PetscCall((*PetscHelpPrintf)(comm, " -options_left: dump list of unused options\n"));
583     PetscCall((*PetscHelpPrintf)(comm, " -options_left no: don't dump list of unused options\n"));
584     PetscCall((*PetscHelpPrintf)(comm, " -tmp tmpdir: alternative /tmp directory\n"));
585     PetscCall((*PetscHelpPrintf)(comm, " -shared_tmp: tmp directory is shared by all processors\n"));
586     PetscCall((*PetscHelpPrintf)(comm, " -not_shared_tmp: each processor has separate tmp directory\n"));
587     PetscCall((*PetscHelpPrintf)(comm, " -memory_view: print memory usage at end of run\n"));
588 #if defined(PETSC_USE_LOG)
589     PetscCall((*PetscHelpPrintf)(comm, " -get_total_flops: total flops over all processors\n"));
590     PetscCall((*PetscHelpPrintf)(comm, " -log_view [:filename:[format]]: logging objects and events\n"));
591     PetscCall((*PetscHelpPrintf)(comm, " -log_trace [filename]: prints trace of all PETSc calls\n"));
592     PetscCall((*PetscHelpPrintf)(comm, " -log_exclude <list,of,classnames>: exclude given classes from logging\n"));
593   #if defined(PETSC_HAVE_DEVICE)
594     PetscCall((*PetscHelpPrintf)(comm, " -log_view_gpu_time: log the GPU time for each and event\n"));
595   #endif
596   #if defined(PETSC_HAVE_MPE)
597     PetscCall((*PetscHelpPrintf)(comm, " -log_mpe: Also create logfile viewable through Jumpshot\n"));
598   #endif
599 #endif
600 #if defined(PETSC_USE_INFO)
601     PetscCall((*PetscHelpPrintf)(comm, " -info [filename][:[~]<list,of,classnames>[:[~]self]]: print verbose information\n"));
602 #endif
603     PetscCall((*PetscHelpPrintf)(comm, " -options_file <file>: reads options from file\n"));
604     PetscCall((*PetscHelpPrintf)(comm, " -options_monitor: monitor options to standard output, including that set previously e.g. in option files\n"));
605     PetscCall((*PetscHelpPrintf)(comm, " -options_monitor_cancel: cancels all hardwired option monitors\n"));
606     PetscCall((*PetscHelpPrintf)(comm, " -petsc_sleep n: sleeps n seconds before running program\n"));
607   }
608 
609 #if defined(PETSC_HAVE_POPEN)
610   {
611     char machine[128];
612     PetscCall(PetscOptionsGetString(NULL, NULL, "-popen_machine", machine, sizeof(machine), &flg1));
613     if (flg1) PetscCall(PetscPOpenSetMachine(machine));
614   }
615 #endif
616 
617   PetscCall(PetscOptionsGetReal(NULL, NULL, "-petsc_sleep", &si, &flg1));
618   if (flg1) PetscCall(PetscSleep(si));
619   PetscFunctionReturn(PETSC_SUCCESS);
620 }
621