return retval;
}
+/**
+ * MPI_Wait and friends
+ **/
int SMPI_MPI_Wait(MPI_Request * request, MPI_Status * status)
{
return smpi_mpi_wait(*request, status);
}
+int SMPI_MPI_Waitall(int count, MPI_Request requests[], MPI_Status status[]) {
+ return smpi_mpi_waitall(count, requests,status);
+}
+int SMPI_MPI_Waitany(int count, MPI_Request requests[], int *index, MPI_Status status[]) {
+ return smpi_mpi_waitany(count, requests, index,status);
+}
/**
* MPI_Bcast
**/
return retval;
}
+void print_buffer_int( void *buf, int len, const char *msg) ;
+void print_buffer_int( void *buf, int len, const char *msg) {
+ int tmp, *v;
+ printf("**%s: ",msg);
+ for (tmp=0;tmp<len;tmp++) {
+ v = buf;
+ printf("[%d]", v[tmp] );
+ }
+ printf("\n");
+}
+
+
/**
* MPI_Reduce
**/
int size;
int i;
smpi_mpi_request_t *tabrequest;
+ smpi_mpi_request_t request;
+
smpi_bench_end();
rank = smpi_mpi_comm_rank(comm);
size = comm->size;
- tabrequest = xbt_malloc((size)*sizeof(smpi_mpi_request_t));
+ printf("-->rank %d. Entering ....\n",rank);
+ print_buffer_int( sendbuf, count, "sendbuf");
+
+ if (rank != root) { // if i am not ROOT, simply send my buffer to root
+ retval = smpi_create_request(sendbuf, count, datatype, rank, root, 0, comm, &request);
+ smpi_mpi_isend(request);
+ smpi_mpi_wait(request, MPI_STATUS_IGNORE);
+ xbt_mallocator_release(smpi_global->request_mallocator, request);
- if (rank != root) { // if i am not root, simply send my buffer to root
- retval = smpi_create_request(sendbuf, count, datatype,
- rank, root, 0, comm, &(tabrequest[rank]));
- smpi_mpi_isend(tabrequest[rank]);
- smpi_mpi_wait(tabrequest[rank], MPI_STATUS_IGNORE);
- //printf("DEBUG: rank %d sent my sendbuf to root (rank %d)\n",rank,root);
} else {
- // i am the root: wait for all buffers by creating requests
+ // i am the ROOT: wait for all buffers by creating one request by sender
+ tabrequest = xbt_malloc((size-1)*sizeof(smpi_mpi_request_t));
+
+ void *tmprecvbuf = xbt_malloc(count*datatype->size); // to store intermediate receptions
+ memcpy(recvbuf,sendbuf,count*datatype->size*sizeof(char)); // initiliaze recv buf with my own snd buf
+
// i can not use: 'request->forward = size-1;' (which would progagate size-1 receive reqs)
// since we should op values as soon as one receiving request matches.
- for (i=0; i<comm->size; i++) {
- if ( rank != i ) { // except for me
- // reminder: for smpi_create_request() the src is always the process sending.
- retval = smpi_create_request(recvbuf, count, datatype, MPI_ANY_SOURCE, root,
- 0, comm, &(tabrequest[i]));
- if (NULL != tabrequest[i] && MPI_SUCCESS == retval) {
- if (MPI_SUCCESS == retval) {
- smpi_mpi_irecv(tabrequest[i]);
- }
+ for (i=0; i<comm->size-1; i++) {
+ // reminder: for smpi_create_request() the src is always the process sending.
+ retval = smpi_create_request(tmprecvbuf, count, datatype, MPI_ANY_SOURCE, root,
+ 0, comm, &(tabrequest[i]));
+ if (NULL != tabrequest[i] && MPI_SUCCESS == retval) {
+ if (MPI_SUCCESS == retval) {
+ smpi_mpi_irecv(tabrequest[i]);
}
}
}
// now, wait for completion of all irecv's.
- // FIXME: we should implement smpi_wait_all for a more asynchronous behavior
- for (i=0; i<comm->size; i++) {
- if ( rank != i ) { // except for me
- smpi_mpi_wait(tabrequest[i], MPI_STATUS_IGNORE);
-
- // FIXME: the core part is here. To be written ...
-
- fprintf(stderr,"[smpi] %s:%d : MPI_Reduce *Not yet implemented*.\n",__FILE__,__LINE__);
- }
+ for (i=0; i<comm->size-1; i++) {
+ int index = MPI_UNDEFINED;
+ smpi_mpi_waitany(comm->size-1, tabrequest, &index, MPI_STATUS_IGNORE);
+
+ print_buffer_int( recvbuf, count, "rcvbuf");
+ printf("MPI_Waitany() unblocked: root received (completes req[%d]): ",index);
+ print_buffer_int( tmprecvbuf, count, "tmprecvbuf");
+
+ // arg 2 is modified
+ op->func (tmprecvbuf,recvbuf,&count,&datatype);
+ print_buffer_int( recvbuf, count, "recvbuf after func");
+ //fprintf(stderr,"[smpi] %s:%d : MPI_Reduce *Not yet implemented*.\n",__FILE__,__LINE__);
+ xbt_mallocator_release(smpi_global->request_mallocator, tabrequest[i]);
}
-
+ xbt_free(tabrequest);
}
- for (i=0; i<comm->size; i++)
- xbt_mallocator_release(smpi_global->request_mallocator, tabrequest[i]);
smpi_bench_begin();
int smpi_compare_rankkeys(const void *a, const void *b);
int smpi_compare_rankkeys(const void *a, const void *b)
{
- int *x = (int *) a;
- int *y = (int *) b;
+ int *x = (int *) a;
+ int *y = (int *) b;
if (x[1] < y[1])
return -1;
