Actual source code: petscsf.h

petsc-master 2020-10-23
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  1: /*
  2:    A star forest (SF) describes a communication pattern
  3: */
  4: #if !defined(PETSCSF_H)
  5: #define PETSCSF_H
  6: #include <petscsys.h>
  7: #include <petscis.h>
  8: #include <petscsftypes.h>

 10: PETSC_EXTERN PetscClassId PETSCSF_CLASSID;

 12: /*J
 13:     PetscSFType - String with the name of a PetscSF type

 15:    Level: beginner

 17: .seealso: PetscSFSetType(), PetscSF
 18: J*/
 19: typedef const char *PetscSFType;
 20: #define PETSCSFBASIC      "basic"
 21: #define PETSCSFNEIGHBOR   "neighbor"
 22: #define PETSCSFALLGATHERV "allgatherv"
 23: #define PETSCSFALLGATHER  "allgather"
 24: #define PETSCSFGATHERV    "gatherv"
 25: #define PETSCSFGATHER     "gather"
 26: #define PETSCSFALLTOALL   "alltoall"
 27: #define PETSCSFWINDOW     "window"

 29: /*E
 30:    PetscSFPattern - Pattern of the PetscSF graph

 32: $  PETSCSF_PATTERN_GENERAL   - A general graph. One sets the graph with PetscSFSetGraph() and usually does not use this enum directly.
 33: $  PETSCSF_PATTERN_ALLGATHER - A graph that every rank gathers all roots from all ranks (like MPI_Allgather/v). One sets the graph with PetscSFSetGraphWithPattern().
 34: $  PETSCSF_PATTERN_GATHER    - A graph that rank 0 gathers all roots from all ranks (like MPI_Gather/v with root=0). One sets the graph with PetscSFSetGraphWithPattern().
 35: $  PETSCSF_PATTERN_ALLTOALL  - A graph that every rank gathers different roots from all ranks (like MPI_Alltoall). One sets the graph with PetscSFSetGraphWithPattern().
 36:                                In an ALLTOALL graph, we assume each process has <size> leaves and <size> roots, with each leaf connecting to a remote root. Here <size> is
 37:                                the size of the communicator. This does not mean one can not communicate multiple data items between a pair of processes. One just needs to
 38:                                create a new MPI datatype for the multiple data items, e.g., by MPI_Type_contiguous.
 39:    Level: beginner

 41: .seealso: PetscSFSetGraph(), PetscSFSetGraphWithPattern()
 42: E*/
 43: typedef enum {PETSCSF_PATTERN_GENERAL=0,PETSCSF_PATTERN_ALLGATHER,PETSCSF_PATTERN_GATHER,PETSCSF_PATTERN_ALLTOALL} PetscSFPattern;

 45: /*E
 46:     PetscSFWindowSyncType - Type of synchronization for PETSCSFWINDOW

 48: $  PETSCSF_WINDOW_SYNC_FENCE - simplest model, synchronizing across communicator
 49: $  PETSCSF_WINDOW_SYNC_LOCK - passive model, less synchronous, requires less setup than PETSCSF_WINDOW_SYNC_ACTIVE, but may require more handshakes
 50: $  PETSCSF_WINDOW_SYNC_ACTIVE - active model, provides most information to MPI implementation, needs to construct 2-way process groups (more setup than PETSCSF_WINDOW_SYNC_LOCK)

 52:    Level: advanced

 54: .seealso: PetscSFWindowSetSyncType(), PetscSFWindowGetSyncType()
 55: E*/
 56: typedef enum {PETSCSF_WINDOW_SYNC_FENCE,PETSCSF_WINDOW_SYNC_LOCK,PETSCSF_WINDOW_SYNC_ACTIVE} PetscSFWindowSyncType;
 57: PETSC_EXTERN const char *const PetscSFWindowSyncTypes[];

 59: /*E
 60:     PetscSFWindowFlavorType - Flavor for the creation of MPI windows for PETSCSFWINDOW

 62: $  PETSCSF_WINDOW_FLAVOR_CREATE - Use MPI_Win_create, no reusage
 63: $  PETSCSF_WINDOW_FLAVOR_DYNAMIC - Use MPI_Win_create_dynamic and dynamically attach pointers
 64: $  PETSCSF_WINDOW_FLAVOR_ALLOCATE - Use MPI_Win_allocate
 65: $  PETSCSF_WINDOW_FLAVOR_SHARED - Use MPI_Win_allocate_shared

 67:    Level: advanced

 69: .seealso: PetscSFWindowSetFlavorType(), PetscSFWindowGetFlavorType()
 70: E*/
 71: typedef enum {PETSCSF_WINDOW_FLAVOR_CREATE,PETSCSF_WINDOW_FLAVOR_DYNAMIC,PETSCSF_WINDOW_FLAVOR_ALLOCATE,PETSCSF_WINDOW_FLAVOR_SHARED} PetscSFWindowFlavorType;
 72: PETSC_EXTERN const char *const PetscSFWindowFlavorTypes[];

 74: /*E
 75:     PetscSFDuplicateOption - Aspects to preserve when duplicating a PetscSF

 77: $  PETSCSF_DUPLICATE_CONFONLY - configuration only, user must call PetscSFSetGraph()
 78: $  PETSCSF_DUPLICATE_RANKS - communication ranks preserved, but different graph (allows simpler setup after calling PetscSFSetGraph())
 79: $  PETSCSF_DUPLICATE_GRAPH - entire graph duplicated

 81:    Level: beginner

 83: .seealso: PetscSFDuplicate()
 84: E*/
 85: typedef enum {PETSCSF_DUPLICATE_CONFONLY,PETSCSF_DUPLICATE_RANKS,PETSCSF_DUPLICATE_GRAPH} PetscSFDuplicateOption;
 86: PETSC_EXTERN const char *const PetscSFDuplicateOptions[];

 88: PETSC_EXTERN PetscFunctionList PetscSFList;
 89: PETSC_EXTERN PetscErrorCode PetscSFRegister(const char[],PetscErrorCode (*)(PetscSF));

 91: PETSC_EXTERN PetscErrorCode PetscSFInitializePackage(void);
 92: PETSC_EXTERN PetscErrorCode PetscSFFinalizePackage(void);
 93: PETSC_EXTERN PetscErrorCode PetscSFCreate(MPI_Comm,PetscSF*);
 94: PETSC_EXTERN PetscErrorCode PetscSFDestroy(PetscSF*);
 95: PETSC_EXTERN PetscErrorCode PetscSFSetType(PetscSF,PetscSFType);
 96: PETSC_EXTERN PetscErrorCode PetscSFGetType(PetscSF,PetscSFType*);
 97: PETSC_EXTERN PetscErrorCode PetscSFView(PetscSF,PetscViewer);
 98: PETSC_EXTERN PetscErrorCode PetscSFViewFromOptions(PetscSF,PetscObject,const char[]);
 99: PETSC_EXTERN PetscErrorCode PetscSFSetUp(PetscSF);
100: PETSC_EXTERN PetscErrorCode PetscSFSetFromOptions(PetscSF);
101: PETSC_EXTERN PetscErrorCode PetscSFDuplicate(PetscSF,PetscSFDuplicateOption,PetscSF*);
102: PETSC_EXTERN PetscErrorCode PetscSFWindowSetSyncType(PetscSF,PetscSFWindowSyncType);
103: PETSC_EXTERN PetscErrorCode PetscSFWindowGetSyncType(PetscSF,PetscSFWindowSyncType*);
104: PETSC_EXTERN PetscErrorCode PetscSFWindowSetFlavorType(PetscSF,PetscSFWindowFlavorType);
105: PETSC_EXTERN PetscErrorCode PetscSFWindowGetFlavorType(PetscSF,PetscSFWindowFlavorType*);
106: PETSC_EXTERN PetscErrorCode PetscSFWindowSetInfo(PetscSF,MPI_Info);
107: PETSC_EXTERN PetscErrorCode PetscSFWindowGetInfo(PetscSF,MPI_Info*);
108: PETSC_EXTERN PetscErrorCode PetscSFSetRankOrder(PetscSF,PetscBool);
109: PETSC_EXTERN PetscErrorCode PetscSFSetGraph(PetscSF,PetscInt,PetscInt,const PetscInt*,PetscCopyMode,const PetscSFNode*,PetscCopyMode);
110: PETSC_EXTERN PetscErrorCode PetscSFSetGraphWithPattern(PetscSF,PetscLayout,PetscSFPattern);
111: PETSC_EXTERN PetscErrorCode PetscSFGetGraph(PetscSF,PetscInt*,PetscInt*,const PetscInt**,const PetscSFNode**);
112: PETSC_EXTERN PetscErrorCode PetscSFGetLeafRange(PetscSF,PetscInt*,PetscInt*);
113: PETSC_EXTERN PetscErrorCode PetscSFCreateEmbeddedSF(PetscSF,PetscInt,const PetscInt*,PetscSF*);
114: PETSC_EXTERN PetscErrorCode PetscSFCreateEmbeddedLeafSF(PetscSF,PetscInt,const PetscInt *, PetscSF *);
115: PETSC_EXTERN PetscErrorCode PetscSFReset(PetscSF);
116: PETSC_EXTERN PetscErrorCode PetscSFSetUpRanks(PetscSF,MPI_Group);
117: PETSC_EXTERN PetscErrorCode PetscSFGetRootRanks(PetscSF,PetscInt*,const PetscMPIInt**,const PetscInt**,const PetscInt**,const PetscInt**);
118: PETSC_EXTERN PetscErrorCode PetscSFGetLeafRanks(PetscSF,PetscInt*,const PetscMPIInt**,const PetscInt**,const PetscInt**);
119: PETSC_EXTERN PetscErrorCode PetscSFGetGroups(PetscSF,MPI_Group*,MPI_Group*);
120: PETSC_EXTERN PetscErrorCode PetscSFGetMultiSF(PetscSF,PetscSF*);
121: PETSC_EXTERN PetscErrorCode PetscSFCreateInverseSF(PetscSF,PetscSF*);

123: PETSC_EXTERN PetscErrorCode PetscSFSetGraphLayout(PetscSF,PetscLayout,PetscInt,const PetscInt*,PetscCopyMode,const PetscInt*);
124: PETSC_EXTERN PetscErrorCode PetscSFSetGraphSection(PetscSF,PetscSection,PetscSection);
125: PETSC_EXTERN PetscErrorCode PetscSFCreateRemoteOffsets(PetscSF, PetscSection, PetscSection, PetscInt **);
126: PETSC_EXTERN PetscErrorCode PetscSFDistributeSection(PetscSF, PetscSection, PetscInt **, PetscSection);
127: PETSC_EXTERN PetscErrorCode PetscSFCreateSectionSF(PetscSF, PetscSection, PetscInt [], PetscSection, PetscSF *);

129: /* Reduce rootdata to leafdata using provided operation */
130: PETSC_EXTERN PetscErrorCode PetscSFBcastAndOpBegin(PetscSF,MPI_Datatype,const void*,void*,MPI_Op)
131:   PetscAttrMPIPointerWithType(3,2) PetscAttrMPIPointerWithType(4,2);
132: PETSC_EXTERN PetscErrorCode PetscSFBcastAndOpEnd(PetscSF,MPI_Datatype,const void*,void*,MPI_Op)
133:   PetscAttrMPIPointerWithType(3,2) PetscAttrMPIPointerWithType(4,2);
134: PETSC_EXTERN PetscErrorCode PetscSFBcastAndOpWithMemTypeBegin(PetscSF,MPI_Datatype,PetscMemType,const void*,PetscMemType,void*,MPI_Op)
135:   PetscAttrMPIPointerWithType(4,2) PetscAttrMPIPointerWithType(6,2);

137: /* Reduce leafdata into rootdata using provided operation */
138: PETSC_EXTERN PetscErrorCode PetscSFReduceBegin(PetscSF,MPI_Datatype,const void*,void *,MPI_Op)
139:   PetscAttrMPIPointerWithType(3,2) PetscAttrMPIPointerWithType(4,2);
140: PETSC_EXTERN PetscErrorCode PetscSFReduceEnd(PetscSF,MPI_Datatype,const void*,void*,MPI_Op)
141:   PetscAttrMPIPointerWithType(3,2) PetscAttrMPIPointerWithType(4,2);
142: PETSC_EXTERN PetscErrorCode PetscSFReduceWithMemTypeBegin(PetscSF,MPI_Datatype,PetscMemType,const void*,PetscMemType,void *,MPI_Op)
143:   PetscAttrMPIPointerWithType(4,2) PetscAttrMPIPointerWithType(6,2);
144: /* Atomically modifies (using provided operation) rootdata using leafdata from each leaf, value at root at time of modification is returned in leafupdate. */
145: PETSC_EXTERN PetscErrorCode PetscSFFetchAndOpBegin(PetscSF,MPI_Datatype,void*,const void*,void*,MPI_Op)
146:   PetscAttrMPIPointerWithType(3,2) PetscAttrMPIPointerWithType(4,2) PetscAttrMPIPointerWithType(5,2);
147: PETSC_EXTERN PetscErrorCode PetscSFFetchAndOpEnd(PetscSF,MPI_Datatype,void*,const void*,void*,MPI_Op)
148:   PetscAttrMPIPointerWithType(3,2) PetscAttrMPIPointerWithType(4,2) PetscAttrMPIPointerWithType(5,2);
149: /* Compute the degree of every root vertex (number of leaves in its star) */
150: PETSC_EXTERN PetscErrorCode PetscSFComputeDegreeBegin(PetscSF,const PetscInt**);
151: PETSC_EXTERN PetscErrorCode PetscSFComputeDegreeEnd(PetscSF,const PetscInt**);
152: PETSC_EXTERN PetscErrorCode PetscSFComputeMultiRootOriginalNumbering(PetscSF,const PetscInt[],PetscInt*,PetscInt*[]);
153: /* Concatenate data from all leaves into roots */
154: PETSC_EXTERN PetscErrorCode PetscSFGatherBegin(PetscSF,MPI_Datatype,const void*,void*)
155:   PetscAttrMPIPointerWithType(3,2) PetscAttrMPIPointerWithType(4,2);
156: PETSC_EXTERN PetscErrorCode PetscSFGatherEnd(PetscSF,MPI_Datatype,const void*,void*)
157:   PetscAttrMPIPointerWithType(3,2) PetscAttrMPIPointerWithType(4,2);
158: /* Distribute distinct values to each leaf from roots */
159: PETSC_EXTERN PetscErrorCode PetscSFScatterBegin(PetscSF,MPI_Datatype,const void*,void*)
160:   PetscAttrMPIPointerWithType(3,2) PetscAttrMPIPointerWithType(4,2);
161: PETSC_EXTERN PetscErrorCode PetscSFScatterEnd(PetscSF,MPI_Datatype,const void*,void*)
162:   PetscAttrMPIPointerWithType(3,2) PetscAttrMPIPointerWithType(4,2);

164: PETSC_EXTERN PetscErrorCode PetscSFCompose(PetscSF,PetscSF,PetscSF*);
165: PETSC_EXTERN PetscErrorCode PetscSFComposeInverse(PetscSF,PetscSF,PetscSF*);

167: #if defined(MPI_REPLACE)
168: #  define MPIU_REPLACE MPI_REPLACE
169: #else
170: /* When using an old MPI such that MPI_REPLACE is not defined, we do not pass MPI_REPLACE to MPI at all.  Instead, we
171:  * use it as a flag for our own reducer in the PETSCSFBASIC implementation.  This could be any unique value unlikely to
172:  * collide with another MPI_Op so we'll just use the value that has been used by every version of MPICH since
173:  * MPICH2-1.0.6. */
174: #  define MPIU_REPLACE (MPI_Op)(0x5800000d)
175: #endif

177: PETSC_DEPRECATED_FUNCTION("Use PetscSFGetRootRanks (since v3.12)")
178: PETSC_STATIC_INLINE PetscErrorCode PetscSFGetRanks(PetscSF sf,PetscInt *nranks,const PetscMPIInt **ranks,const PetscInt **roffset,const PetscInt **rmine,const PetscInt **rremote) {
179:   return PetscSFGetRootRanks(sf,nranks,ranks,roffset,rmine,rremote);
180: }

182: /*@C
183:    PetscSFBcastBegin - begin pointwise broadcast to be concluded with call to PetscSFBcastEnd()

185:    Collective on PetscSF

187:    Input Arguments:
188: +  sf - star forest on which to communicate
189: .  unit - data type associated with each node
190: -  rootdata - buffer to broadcast

192:    Output Arguments:
193: .  leafdata - buffer to update with values from each leaf's respective root

195:    Level: intermediate

197: .seealso: PetscSFCreate(), PetscSFSetGraph(), PetscSFView(), PetscSFBcastEnd(), PetscSFReduceBegin(), PetscSFBcastAndOpBegin()
198: @*/
199: PETSC_STATIC_INLINE PetscErrorCode PetscSFBcastBegin(PetscSF sf,MPI_Datatype unit,const void* rootdata,void* leafdata) {
200:   return PetscSFBcastAndOpBegin(sf,unit,rootdata,leafdata,MPIU_REPLACE);
201: }

203: PETSC_STATIC_INLINE PetscErrorCode PetscSFBcastWithMemTypeBegin(PetscSF sf,MPI_Datatype unit,PetscMemType rootmtype,const void* rootdata,PetscMemType leafmtype,void* leafdata) {
204:   return PetscSFBcastAndOpWithMemTypeBegin(sf,unit,rootmtype,rootdata,leafmtype,leafdata,MPIU_REPLACE);
205: }

207: /*@C
208:    PetscSFBcastEnd - end a broadcast operation started with PetscSFBcastBegin()

210:    Collective

212:    Input Arguments:
213: +  sf - star forest
214: .  unit - data type
215: -  rootdata - buffer to broadcast

217:    Output Arguments:
218: .  leafdata - buffer to update with values from each leaf's respective root

220:    Level: intermediate

222: .seealso: PetscSFSetGraph(), PetscSFReduceEnd()
223: @*/
224: PETSC_STATIC_INLINE PetscErrorCode PetscSFBcastEnd(PetscSF sf,MPI_Datatype unit,const void* rootdata,void* leafdata) {
225:   return PetscSFBcastAndOpEnd(sf,unit,rootdata,leafdata,MPIU_REPLACE);
226: }

228: #endif