XBT_LOG_EXTERNAL_CATEGORY(smpi_sender);
XBT_LOG_EXTERNAL_CATEGORY(smpi_util);
+#define EAGER_LIMIT 65536
+#define RDV_TAG (-10)
+
void smpi_process_init(int* argc, char*** argv) {
int index;
smpi_process_data_t data;
/* MPI Low level calls */
MPI_Request smpi_mpi_isend(void* buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm) {
MPI_Request request;
-
+ MPI_Request rdv[2];
+ size_t size = smpi_datatype_size(datatype) * count;
+
+ if (size > EAGER_LIMIT) {
+ /* Warning: this (zero-length synchronous) call will come back here with size == 0 */
+ DEBUG1("RDV send to %d", dst);
+ rdv[0] = smpi_mpi_isend(NULL, 0, MPI_BYTE, dst, RDV_TAG, comm);
+ rdv[1] = smpi_mpi_irecv(NULL, 0, MPI_BYTE, dst, RDV_TAG, comm);
+ smpi_mpi_waitall(2, rdv, MPI_STATUS_IGNORE);
+ }
request = xbt_new(s_smpi_mpi_request_t, 1);
request->comm = comm;
request->src = smpi_comm_rank(comm);
request->dst = dst;
request->tag = tag;
- request->size = smpi_datatype_size(datatype) * count;
+ request->size = size;
request->complete = 0;
+ request->data = request;
smpi_process_post_send(comm, request);
- request->pair = SIMIX_network_isend(request->rdv, request->size, -1.0, buf, request->size, request);
+ request->pair = SIMIX_network_isend(request->rdv, request->size, -1.0, buf, request->size, NULL);
return request;
}
MPI_Request smpi_mpi_irecv(void* buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm) {
MPI_Request request;
-
+ MPI_Request rdv[2];
+ size_t size = smpi_datatype_size(datatype) * count;
+
+ if (size > EAGER_LIMIT) {
+ /* Warning: this (zero-length synchronous) call will come back here with size == 0 */
+ DEBUG1("RDV recv from %d", src);
+ rdv[0] = smpi_mpi_irecv(NULL, 0, MPI_BYTE, src, RDV_TAG, comm);
+ rdv[1] = smpi_mpi_isend(NULL, 0, MPI_BYTE, src, RDV_TAG, comm);
+ smpi_mpi_waitall(2, rdv, MPI_STATUS_IGNORE);
+ }
request = xbt_new(s_smpi_mpi_request_t, 1);
request->comm = comm;
request->src = src;
request->dst = smpi_comm_rank(comm);
request->tag = tag;
- request->size = smpi_datatype_size(datatype) * count;
+ request->size = size;
request->complete = 0;
+ request->data = MPI_REQUEST_NULL;
smpi_process_post_recv(request);
request->pair = SIMIX_network_irecv(request->rdv, buf, &request->size);
return request;
smpi_mpi_wait(&request, status);
}
-void smpi_mpi_send(void* buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm) {
+void smpi_mpi_send(void* buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm) {
MPI_Request request;
- request = smpi_mpi_isend(buf, count, datatype, src, tag, comm);
+ request = smpi_mpi_isend(buf, count, datatype, dst, tag, comm);
smpi_mpi_wait(&request, MPI_STATUS_IGNORE);
}
}
static void finish_wait(MPI_Request* request, MPI_Status* status) {
- MPI_Request data = (MPI_Request)SIMIX_communication_get_data((*request)->pair);
+ MPI_Request data = (*request)->data;
xbt_assert0(data != MPI_REQUEST_NULL, "Erroneous situation");
if(status != MPI_STATUS_IGNORE) {
status->MPI_SOURCE = (*request)->src;
status->MPI_TAG = (*request)->tag;
status->MPI_ERROR = MPI_SUCCESS;
+ status->_count = (*request)->size; // size in bytes
+ status->_cancelled = 0; // FIXME: cancellation of requests not handled yet
}
DEBUG3("finishing wait for %p [data = %p, complete = %d]", *request, data, data->complete);
// data == *request if sender is first to finish its wait
// receiver cleans everything
xbt_free(data);
}
+ SIMIX_rdv_destroy((*request)->rdv);
xbt_free(*request);
}
*request = MPI_REQUEST_NULL;
}
int smpi_mpi_test(MPI_Request* request, MPI_Status* status) {
- MPI_Request data = (MPI_Request)SIMIX_communication_get_data((*request)->pair);
+ MPI_Request data = (*request)->data;
int flag = data && data->complete == 1;
if(flag) {
+ SIMIX_communication_destroy((*request)->pair);
finish_wait(request, status);
}
return flag;
flag = 0;
for(i = 0; i < count; i++) {
if(requests[i] != MPI_REQUEST_NULL) {
- data = (MPI_Request)SIMIX_communication_get_data(requests[i]->pair);
+ data = requests[i]->data;
if(data != MPI_REQUEST_NULL && data->complete == 1) {
+ SIMIX_communication_destroy(requests[i]->pair);
finish_wait(&requests[i], status);
*index = i;
flag = 1;
return flag;
}
+
+void smpi_mpi_get_count(MPI_Status *status, MPI_Datatype datatype, int *count) {
+ int size = smpi_datatype_size(datatype);
+ *count = (int)(status->_count / size);
+ if ( (int)((*count) * size) != status->_count )
+ *count = MPI_UNDEFINED;
+}
+
+
void smpi_mpi_wait(MPI_Request* request, MPI_Status* status) {
- MPI_Request data = (MPI_Request)SIMIX_communication_get_data((*request)->pair);
+ MPI_Request data = (*request)->data;
DEBUG6("wait for request %p (%p: %p) [src = %d, dst = %d, tag = %d]",
*request, (*request)->pair, data, (*request)->src, (*request)->dst, (*request)->tag);
// data is null if receiver waits before sender enters the rdv
if(data == MPI_REQUEST_NULL || data->complete == 0) {
SIMIX_network_wait((*request)->pair, -1.0);
+ } else {
+ SIMIX_communication_destroy((*request)->pair);
}
finish_wait(request, status);
}
// First check for already completed requests
for(i = 0; i < count; i++) {
if(requests[i] != MPI_REQUEST_NULL) {
- data = (MPI_Request)SIMIX_communication_get_data(requests[i]->pair);
+ data = requests[i]->data;
if(data != MPI_REQUEST_NULL && data->complete == 1) {
index = i;
+ SIMIX_communication_destroy(requests[index]->pair); // always succeeds (but cleans the simix layer)
break;
}
}
int i, count;
count = 0;
- for(i = 0; i < count; i++) {
+ for(i = 0; i < incount; i++) {
if(requests[i] != MPI_REQUEST_NULL) {
- data = (MPI_Request)SIMIX_communication_get_data(requests[i]->pair);
+ data = requests[i]->data;
if(data != MPI_REQUEST_NULL && data->complete == 1) {
+ SIMIX_communication_destroy(requests[i]->pair);
finish_wait(&requests[i], status != MPI_STATUS_IGNORE ? &status[i] : MPI_STATUS_IGNORE);
indices[count] = i;
count++;
int rank, size, src, index, datasize;
MPI_Request* requests;
void** tmpbufs;
-
+
rank = smpi_comm_rank(comm);
size = smpi_comm_size(comm);
if(rank != root) {
} else {
datasize = smpi_datatype_size(datatype);
// Local copy from root
- memcpy(recvbuf, sendbuf, count * datasize * sizeof(char));
+ memcpy(recvbuf, sendbuf, count * datasize * sizeof(char));
// Receive buffers from senders
//TODO: make a MPI_barrier here ?
requests = xbt_new(MPI_Request, size - 1);
int rank, size, other, index, datasize;
MPI_Request* requests;
void** tmpbufs;
-
+
rank = smpi_comm_rank(comm);
size = smpi_comm_size(comm);
datasize = smpi_datatype_size(datatype);
// Local copy from self
- memcpy(recvbuf, sendbuf, count * datasize * sizeof(char));
+ memcpy(recvbuf, sendbuf, count * datasize * sizeof(char));
// Send/Recv buffers to/from others;
//TODO: make a MPI_barrier here ?
requests = xbt_new(MPI_Request, 2 * (size - 1));
xbt_free(requests);
*/
}
+
+void smpi_mpi_scan(void* sendbuf, void* recvbuf, int count, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm) {
+ int system_tag = 666;
+ int rank, size, other, index, datasize;
+ int total;
+ MPI_Request* requests;
+ void** tmpbufs;
+
+ rank = smpi_comm_rank(comm);
+ size = smpi_comm_size(comm);
+ datasize = smpi_datatype_size(datatype);
+ // Local copy from self
+ memcpy(recvbuf, sendbuf, count * datasize * sizeof(char));
+ // Send/Recv buffers to/from others;
+ total = rank + (size - (rank + 1));
+ requests = xbt_new(MPI_Request, total);
+ tmpbufs = xbt_new(void*, rank);
+ index = 0;
+ for(other = 0; other < rank; other++) {
+ tmpbufs[index] = xbt_malloc(count * datasize);
+ requests[index] = smpi_mpi_irecv(tmpbufs[index], count, datatype, other, system_tag, comm);
+ index++;
+ }
+ for(other = rank + 1; other < size; other++) {
+ requests[index] = smpi_mpi_isend(sendbuf, count, datatype, other, system_tag, comm);
+ index++;
+ }
+ // Wait for completion of all comms.
+ for(other = 0; other < total; other++) {
+ index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE);
+ if(index == MPI_UNDEFINED) {
+ break;
+ }
+ if(index < rank) {
+ // #Request is below rank: it's a irecv
+ smpi_op_apply(op, tmpbufs[index], recvbuf, &count, &datatype);
+ }
+ }
+ for(index = 0; index < size - 1; index++) {
+ xbt_free(tmpbufs[index]);
+ }
+ xbt_free(tmpbufs);
+ xbt_free(requests);
+}
