MPI
int MPI_Init(int* argc, char** argv)
. , MPI , . MPI- MPI_Init.
: - MPI_SUCCESS, - . ( ).
MPI_Init , main:
:
| int main(int argc, char** argv) { MPI_Init(&argc, &argv); } |
MPI
int MPI_Finalize(void)
. MPI-, MPI_Init, . MPI_Finalize .
:
| int main(int argc, char** argv) { MPI_Finalize(); } |
int MPI_Comm_size(MPI_Comm comm, int* size)
comm ( comm MPI_COMM_WORLD - " ", ).
comm -
size - . , .
:
| int size; MPI_Comm_size(MPI_COMM_WORLD, &size); |
int MPI_Comm_rank(MPI_comm comm, int* rank)
comm. ( , rank) 0 size-1.
comm -
rank - comm
:
| int rank; MPI_Comm_rank(MPI_COMM_WORLD, &rank); |
int MPI_Abort(MPI_Comm comm, int errorcode)
. .
errorcode -
comm -
:
| MPI_Abort(MPI_COMM_WORLD,MPI_ERR_OTHER); |
int MPI_Send(void* buf, int count, MPI_Datatype datatype, int dest, int msgtag, MPI_Comm comm)
msgtag, count datatype, dest. buf. count . datatype ( - MPI_INT). . . , .
|
|
|
buf -
count -
datatype -
dest - -
msgtag -
comm -
:
| #define N 10 int rank,buf[N]; MPI_Send(buf,N,MPI_INT,1,10,MPI_COMM_WORLD); |
int MPI_Recv(void* buf, int count, MPI_Datatype datatype, int source, int msgtag, MPI_comm comm, MPI_Status *status)
msgtag source . count.
buf -
count -
datatype -
source - -
msgtag -
comm -
status -
:
| #define N 10 int rank,buf[N]; MPI_Status status; MPI_Recv(buf,N,MPI_INT,1,10,MPI_COMM_WORLD,&status); |
