int main(int argc,char **argv)
{
PetscErrorCode ierr;
UserCtx user;
DM red,da;
SNES snes;
DM packer;
PetscBool use_monitor = PETSC_FALSE;
ierr = PetscInitialize(&argc,&argv,NULL,help);if (ierr) return ierr;
ierr = PetscOptionsSetFromOptions(NULL);CHKERRQ(ierr);
/* Hardwire several options; can be changed at command line */
ierr = PetscOptionsInsertString(NULL,common_options);CHKERRQ(ierr);
ierr = PetscOptionsInsertString(NULL,matrix_free_options);CHKERRQ(ierr);
ierr = PetscOptionsInsert(NULL,&argc,&argv,NULL);CHKERRQ(ierr);
ierr = PetscOptionsGetBool(NULL,NULL,"-use_monitor",&use_monitor,PETSC_IGNORE);CHKERRQ(ierr);
/* Create a global vector that includes a single redundant array and two da arrays */
ierr = DMCompositeCreate(PETSC_COMM_WORLD,&packer);CHKERRQ(ierr);
ierr = DMRedundantCreate(PETSC_COMM_WORLD,0,1,&red);CHKERRQ(ierr);
ierr = DMSetOptionsPrefix(red,"red_");CHKERRQ(ierr);
ierr = DMCompositeAddDM(packer,red);CHKERRQ(ierr);
ierr = DMDACreate1d(PETSC_COMM_WORLD,DM_BOUNDARY_NONE,-5,2,1,NULL,&da);CHKERRQ(ierr);
ierr = DMSetOptionsPrefix(red,"da_");CHKERRQ(ierr);
ierr = DMCompositeAddDM(packer,(DM)da);CHKERRQ(ierr);
ierr = DMSetApplicationContext(packer,&user);CHKERRQ(ierr);
packer->ops->creatematrix = DMCreateMatrix_MF;
/* create nonlinear multi-level solver */
ierr = SNESCreate(PETSC_COMM_WORLD,&snes);CHKERRQ(ierr);
ierr = SNESSetDM(snes,packer);CHKERRQ(ierr);
ierr = SNESSetFunction(snes,NULL,ComputeFunction,NULL);CHKERRQ(ierr);
ierr = SNESSetJacobian(snes,NULL, NULL,ComputeJacobian_MF,NULL);CHKERRQ(ierr);
ierr = SNESSetFromOptions(snes);CHKERRQ(ierr);
if (use_monitor) {
/* create graphics windows */
ierr = PetscViewerDrawOpen(PETSC_COMM_WORLD,0,"u_lambda - state variables and Lagrange multipliers",-1,-1,-1,-1,&user.u_lambda_viewer);CHKERRQ(ierr);
ierr = PetscViewerDrawOpen(PETSC_COMM_WORLD,0,"fu_lambda - derivate w.r.t. state variables and Lagrange multipliers",-1,-1,-1,-1,&user.fu_lambda_viewer);CHKERRQ(ierr);
ierr = SNESMonitorSet(snes,Monitor,0,0);CHKERRQ(ierr);
}
ierr = SNESSolve(snes,NULL,NULL);CHKERRQ(ierr);
ierr = SNESDestroy(&snes);CHKERRQ(ierr);
ierr = DMDestroy(&red);CHKERRQ(ierr);
ierr = DMDestroy(&da);CHKERRQ(ierr);
ierr = DMDestroy(&packer);CHKERRQ(ierr);
if (use_monitor) {
ierr = PetscViewerDestroy(&user.u_lambda_viewer);CHKERRQ(ierr);
ierr = PetscViewerDestroy(&user.fu_lambda_viewer);CHKERRQ(ierr);
}
ierr = PetscFinalize();
return ierr;
}
/*@C
PetscInitialize - Initializes the PETSc database and MPI.
PetscInitialize() calls MPI_Init() if that has yet to be called,
so this routine should always be called near the beginning of
your program -- usually the very first line!
Collective on MPI_COMM_WORLD or PETSC_COMM_WORLD if it has been set
Input Parameters:
+ argc - count of number of command line arguments
. args - the command line arguments
. file - [optional] PETSc database file, also checks ~username/.petscrc and .petscrc use NULL to not check for
code specific file. Use -skip_petscrc in the code specific file to skip the .petscrc files
- help - [optional] Help message to print, use NULL for no message
If you wish PETSc code to run ONLY on a subcommunicator of MPI_COMM_WORLD, create that
communicator first and assign it to PETSC_COMM_WORLD BEFORE calling PetscInitialize(). Thus if you are running a
four process job and two processes will run PETSc and have PetscInitialize() and PetscFinalize() and two process will not,
then do this. If ALL processes in the job are using PetscInitialize() and PetscFinalize() then you don't need to do this, even
if different subcommunicators of the job are doing different things with PETSc.
Options Database Keys:
+ -start_in_debugger [noxterm,dbx,xdb,gdb,...] - Starts program in debugger
. -on_error_attach_debugger [noxterm,dbx,xdb,gdb,...] - Starts debugger when error detected
. -on_error_emacs <machinename> causes emacsclient to jump to error file
. -on_error_abort calls abort() when error detected (no traceback)
. -on_error_mpiabort calls MPI_abort() when error detected
. -error_output_stderr prints error messages to stderr instead of the default stdout
. -error_output_none does not print the error messages (but handles errors in the same way as if this was not called)
. -debugger_nodes [node1,node2,...] - Indicates nodes to start in debugger
. -debugger_pause [sleeptime] (in seconds) - Pauses debugger
. -stop_for_debugger - Print message on how to attach debugger manually to
process and wait (-debugger_pause) seconds for attachment
. -malloc - Indicates use of PETSc error-checking malloc (on by default for debug version of libraries)
. -malloc no - Indicates not to use error-checking malloc
. -malloc_debug - check for memory corruption at EVERY malloc or free
. -malloc_test - like -malloc_dump -malloc_debug, but only active for debugging builds
. -fp_trap - Stops on floating point exceptions (Note that on the
IBM RS6000 this slows code by at least a factor of 10.)
. -no_signal_handler - Indicates not to trap error signals
. -shared_tmp - indicates /tmp directory is shared by all processors
. -not_shared_tmp - each processor has own /tmp
. -tmp - alternative name of /tmp directory
. -get_total_flops - returns total flops done by all processors
. -memory_info - Print memory usage at end of run
- -server <port> - start PETSc webserver (default port is 8080)
Options Database Keys for Profiling:
See the <a href="../../docs/manual.pdf#nameddest=ch_profiling">profiling chapter of the users manual</a> for details.
+ -info <optional filename> - Prints verbose information to the screen
. -info_exclude <null,vec,mat,pc,ksp,snes,ts> - Excludes some of the verbose messages
. -log_sync - Log the synchronization in scatters, inner products and norms
. -log_trace [filename] - Print traces of all PETSc calls to the screen (useful to determine where a program
hangs without running in the debugger). See PetscLogTraceBegin().
. -log_summary [filename] - Prints summary of flop and timing information to screen. If the filename is specified the
summary is written to the file. See PetscLogView().
. -log_summary_python [filename] - Prints data on of flop and timing usage to a file or screen. See PetscLogPrintSViewPython().
. -log_all [filename] - Logs extensive profiling information See PetscLogDump().
. -log [filename] - Logs basic profiline information See PetscLogDump().
- -log_mpe [filename] - Creates a logfile viewable by the utility Jumpshot (in MPICH distribution)
Only one of -log_trace, -log_summary, -log_all, -log, or -log_mpe may be used at a time
Environmental Variables:
+ PETSC_TMP - alternative tmp directory
. PETSC_SHARED_TMP - tmp is shared by all processes
. PETSC_NOT_SHARED_TMP - each process has its own private tmp
. PETSC_VIEWER_SOCKET_PORT - socket number to use for socket viewer
- PETSC_VIEWER_SOCKET_MACHINE - machine to use for socket viewer to connect to
Level: beginner
Notes:
If for some reason you must call MPI_Init() separately, call
it before PetscInitialize().
Fortran Version:
In Fortran this routine has the format
$ call PetscInitialize(file,ierr)
+ ierr - error return code
- file - [optional] PETSc database file, also checks ~username/.petscrc and .petscrc use NULL_CHARACTER to not check for
code specific file. Use -skip_petscrc in the code specific file to skip the .petscrc files
Important Fortran Note:
In Fortran, you MUST use NULL_CHARACTER to indicate a
null character string; you CANNOT just use NULL as
in the C version. See the <a href="../../docs/manual.pdf">users manual</a> for details.
If your main program is C but you call Fortran code that also uses PETSc you need to call PetscInitializeFortran() soon after
calling PetscInitialize().
Concepts: initializing PETSc
.seealso: PetscFinalize(), PetscInitializeFortran(), PetscGetArgs(), PetscInitializeNoArguments()
@*/
PetscErrorCode PetscInitialize(int *argc,char ***args,const char file[],const char help[])
{
PetscErrorCode ierr;
PetscMPIInt flag, size;
PetscInt nodesize;
PetscBool flg;
char hostname[256];
PetscFunctionBegin;
if (PetscInitializeCalled) PetscFunctionReturn(0);
/* these must be initialized in a routine, not as a constant declaration*/
PETSC_STDOUT = stdout;
PETSC_STDERR = stderr;
ierr = PetscOptionsCreate();CHKERRQ(ierr);
/*
We initialize the program name here (before MPI_Init()) because MPICH has a bug in
it that it sets args[0] on all processors to be args[0] on the first processor.
*/
if (argc && *argc) {
ierr = PetscSetProgramName(**args);CHKERRQ(ierr);
} else {
ierr = PetscSetProgramName("Unknown Name");CHKERRQ(ierr);
}
ierr = MPI_Initialized(&flag);CHKERRQ(ierr);
if (!flag) {
if (PETSC_COMM_WORLD != MPI_COMM_NULL) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"You cannot set PETSC_COMM_WORLD if you have not initialized MPI first");
#if defined(PETSC_HAVE_MPI_INIT_THREAD)
{
PetscMPIInt provided;
ierr = MPI_Init_thread(argc,args,MPI_THREAD_FUNNELED,&provided);CHKERRQ(ierr);
}
#else
ierr = MPI_Init(argc,args);CHKERRQ(ierr);
#endif
PetscBeganMPI = PETSC_TRUE;
}
if (argc && args) {
PetscGlobalArgc = *argc;
PetscGlobalArgs = *args;
}
PetscFinalizeCalled = PETSC_FALSE;
if (PETSC_COMM_WORLD == MPI_COMM_NULL) PETSC_COMM_WORLD = MPI_COMM_WORLD;
ierr = MPI_Comm_set_errhandler(PETSC_COMM_WORLD,MPI_ERRORS_RETURN);CHKERRQ(ierr);
/* Done after init due to a bug in MPICH-GM? */
ierr = PetscErrorPrintfInitialize();CHKERRQ(ierr);
ierr = MPI_Comm_rank(MPI_COMM_WORLD,&PetscGlobalRank);CHKERRQ(ierr);
ierr = MPI_Comm_size(MPI_COMM_WORLD,&PetscGlobalSize);CHKERRQ(ierr);
MPIU_BOOL = MPI_INT;
MPIU_ENUM = MPI_INT;
/*
Initialized the global complex variable; this is because with
shared libraries the constructors for global variables
are not called; at least on IRIX.
*/
#if defined(PETSC_HAVE_COMPLEX)
{
#if defined(PETSC_CLANGUAGE_CXX)
PetscComplex ic(0.0,1.0);
PETSC_i = ic;
#elif defined(PETSC_CLANGUAGE_C)
PETSC_i = _Complex_I;
#endif
}
#if !defined(PETSC_HAVE_MPI_C_DOUBLE_COMPLEX)
ierr = MPI_Type_contiguous(2,MPI_DOUBLE,&MPIU_C_DOUBLE_COMPLEX);CHKERRQ(ierr);
ierr = MPI_Type_commit(&MPIU_C_DOUBLE_COMPLEX);CHKERRQ(ierr);
ierr = MPI_Type_contiguous(2,MPI_FLOAT,&MPIU_C_COMPLEX);CHKERRQ(ierr);
ierr = MPI_Type_commit(&MPIU_C_COMPLEX);CHKERRQ(ierr);
#endif
#endif /* PETSC_HAVE_COMPLEX */
/*
Create the PETSc MPI reduction operator that sums of the first
half of the entries and maxes the second half.
*/
ierr = MPI_Op_create(PetscMaxSum_Local,1,&PetscMaxSum_Op);CHKERRQ(ierr);
#if defined(PETSC_USE_REAL___FLOAT128)
ierr = MPI_Type_contiguous(2,MPI_DOUBLE,&MPIU___FLOAT128);CHKERRQ(ierr);
ierr = MPI_Type_commit(&MPIU___FLOAT128);CHKERRQ(ierr);
#if defined(PETSC_HAVE_COMPLEX)
ierr = MPI_Type_contiguous(4,MPI_DOUBLE,&MPIU___COMPLEX128);CHKERRQ(ierr);
ierr = MPI_Type_commit(&MPIU___COMPLEX128);CHKERRQ(ierr);
#endif
ierr = MPI_Op_create(PetscMax_Local,1,&MPIU_MAX);CHKERRQ(ierr);
ierr = MPI_Op_create(PetscMin_Local,1,&MPIU_MIN);CHKERRQ(ierr);
#endif
#if (defined(PETSC_HAVE_COMPLEX) && !defined(PETSC_HAVE_MPI_C_DOUBLE_COMPLEX)) || defined(PETSC_USE_REAL___FLOAT128)
ierr = MPI_Op_create(PetscSum_Local,1,&MPIU_SUM);CHKERRQ(ierr);
#endif
ierr = MPI_Type_contiguous(2,MPIU_SCALAR,&MPIU_2SCALAR);CHKERRQ(ierr);
ierr = MPI_Type_commit(&MPIU_2SCALAR);CHKERRQ(ierr);
ierr = MPI_Op_create(PetscADMax_Local,1,&PetscADMax_Op);CHKERRQ(ierr);
ierr = MPI_Op_create(PetscADMin_Local,1,&PetscADMin_Op);CHKERRQ(ierr);
#if defined(PETSC_USE_64BIT_INDICES) || !defined(MPI_2INT)
ierr = MPI_Type_contiguous(2,MPIU_INT,&MPIU_2INT);CHKERRQ(ierr);
ierr = MPI_Type_commit(&MPIU_2INT);CHKERRQ(ierr);
#endif
/*
Attributes to be set on PETSc communicators
*/
ierr = MPI_Keyval_create(MPI_NULL_COPY_FN,Petsc_DelCounter,&Petsc_Counter_keyval,(void*)0);CHKERRQ(ierr);
ierr = MPI_Keyval_create(MPI_NULL_COPY_FN,Petsc_DelComm_Outer,&Petsc_InnerComm_keyval,(void*)0);CHKERRQ(ierr);
ierr = MPI_Keyval_create(MPI_NULL_COPY_FN,Petsc_DelComm_Inner,&Petsc_OuterComm_keyval,(void*)0);CHKERRQ(ierr);
/*
Build the options database
*/
ierr = PetscOptionsInsert(argc,args,file);CHKERRQ(ierr);
/*
Print main application help message
*/
ierr = PetscOptionsHasName(NULL,"-help",&flg);CHKERRQ(ierr);
if (help && flg) {
ierr = PetscPrintf(PETSC_COMM_WORLD,help);CHKERRQ(ierr);
}
ierr = PetscOptionsCheckInitial_Private();CHKERRQ(ierr);
/* SHOULD PUT IN GUARDS: Make sure logging is initialized, even if we do not print it out */
#if defined(PETSC_USE_LOG)
ierr = PetscLogBegin_Private();CHKERRQ(ierr);
#endif
/*
Load the dynamic libraries (on machines that support them), this registers all
the solvers etc. (On non-dynamic machines this initializes the PetscDraw and PetscViewer classes)
*/
ierr = PetscInitialize_DynamicLibraries();CHKERRQ(ierr);
ierr = MPI_Comm_size(PETSC_COMM_WORLD,&size);CHKERRQ(ierr);
ierr = PetscInfo1(0,"PETSc successfully started: number of processors = %d\n",size);CHKERRQ(ierr);
ierr = PetscGetHostName(hostname,256);CHKERRQ(ierr);
ierr = PetscInfo1(0,"Running on machine: %s\n",hostname);CHKERRQ(ierr);
ierr = PetscOptionsCheckInitial_Components();CHKERRQ(ierr);
/* Check the options database for options related to the options database itself */
ierr = PetscOptionsSetFromOptions();CHKERRQ(ierr);
#if defined(PETSC_USE_PETSC_MPI_EXTERNAL32)
/*
Tell MPI about our own data representation converter, this would/should be used if extern32 is not supported by the MPI
Currently not used because it is not supported by MPICH.
*/
#if !defined(PETSC_WORDS_BIGENDIAN)
ierr = MPI_Register_datarep((char*)"petsc",PetscDataRep_read_conv_fn,PetscDataRep_write_conv_fn,PetscDataRep_extent_fn,NULL);CHKERRQ(ierr);
#endif
#endif
ierr = PetscOptionsGetInt(NULL,"-hmpi_spawn_size",&nodesize,&flg);CHKERRQ(ierr);
if (flg) {
#if defined(PETSC_HAVE_MPI_COMM_SPAWN)
ierr = PetscHMPISpawn((PetscMPIInt) nodesize);CHKERRQ(ierr); /* worker nodes never return from here; they go directly to PetscEnd() */
#else
SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"PETSc built without MPI 2 (MPI_Comm_spawn) support, use -hmpi_merge_size instead");
#endif
} else {
ierr = PetscOptionsGetInt(NULL,"-hmpi_merge_size",&nodesize,&flg);CHKERRQ(ierr);
if (flg) {
ierr = PetscHMPIMerge((PetscMPIInt) nodesize,NULL,NULL);CHKERRQ(ierr);
if (PetscHMPIWorker) { /* if worker then never enter user code */
PetscInitializeCalled = PETSC_TRUE;
PetscEnd();
}
}
}
#if defined(PETSC_HAVE_CUDA)
{
PetscMPIInt p;
for (p = 0; p < PetscGlobalSize; ++p) {
if (p == PetscGlobalRank) cublasInit();
ierr = MPI_Barrier(PETSC_COMM_WORLD);CHKERRQ(ierr);
}
}
#endif
ierr = PetscOptionsHasName(NULL,"-python",&flg);CHKERRQ(ierr);
if (flg) {
PetscInitializeCalled = PETSC_TRUE;
ierr = PetscPythonInitialize(NULL,NULL);CHKERRQ(ierr);
}
ierr = PetscThreadCommInitializePackage();CHKERRQ(ierr);
/*
Setup building of stack frames for all function calls
*/
#if defined(PETSC_USE_DEBUG)
PetscThreadLocalRegister((PetscThreadKey*)&petscstack); /* Creates petscstack_key if needed */
ierr = PetscStackCreate();CHKERRQ(ierr);
#endif
#if defined(PETSC_SERIALIZE_FUNCTIONS)
ierr = PetscFPTCreate(10000);CHKERRQ(ierr);
#endif
/*
Once we are completedly initialized then we can set this variables
*/
PetscInitializeCalled = PETSC_TRUE;
PetscFunctionReturn(0);
}
PETSC_EXTERN void PETSC_STDCALL petscoptionssetfromoptions_(int *__ierr ) {
*__ierr = PetscOptionsSetFromOptions();
}