XBT_LOG_EXTERNAL_CATEGORY(smpi_bench);
XBT_LOG_EXTERNAL_CATEGORY(smpi_kernel);
XBT_LOG_EXTERNAL_CATEGORY(smpi_mpi);
+XBT_LOG_EXTERNAL_CATEGORY(smpi_mpi_dt);
+XBT_LOG_EXTERNAL_CATEGORY(smpi_coll);
XBT_LOG_EXTERNAL_CATEGORY(smpi_receiver);
XBT_LOG_EXTERNAL_CATEGORY(smpi_sender);
XBT_LOG_EXTERNAL_CATEGORY(smpi_util);
-smpi_mpi_global_t smpi_mpi_global = NULL;
-
-void smpi_mpi_land_func(void *a, void *b, int *length,
- MPI_Datatype * datatype);
-
-void smpi_mpi_land_func(void *a, void *b, int *length,
- MPI_Datatype * datatype)
-{
- int i;
- if (*datatype == smpi_mpi_global->mpi_int) {
- int *x = a, *y = b;
- for (i = 0; i < *length; i++) {
- y[i] = x[i] && y[i];
- }
+void smpi_process_init(int* argc, char*** argv) {
+ int index;
+ smpi_process_data_t data;
+ smx_process_t proc;
+
+ proc = SIMIX_process_self();
+ index = atoi((*argv)[1]);
+ data = smpi_process_remote_data(index);
+ SIMIX_process_set_data(proc, data);
+ if (*argc > 2) {
+ free((*argv)[1]);
+ memmove(&(*argv)[1], &(*argv)[2], sizeof(char *) * (*argc - 2));
+ (*argv)[(*argc) - 1] = NULL;
}
+ (*argc)--;
+ DEBUG2("<%d> New process in the game: %p", index, proc);
}
-void smpi_mpi_sum_func(void *a, void *b, int *length,
- MPI_Datatype * datatype);
+void smpi_process_destroy(void) {
+ int index = smpi_process_index();
-void smpi_mpi_sum_func(void *a, void *b, int *length, MPI_Datatype * datatype)
-{
- int i;
- if (*datatype == smpi_mpi_global->mpi_int) {
- int *x = a, *y = b;
- for (i = 0; i < *length; i++) {
- y[i] = x[i] + y[i];
- }
- }
+ DEBUG1("<%d> Process left the game", index);
}
-int smpi_mpi_comm_rank(smpi_mpi_communicator_t comm)
-{
- return comm->index_to_rank_map[smpi_host_index()];
+/* 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;
+
+ 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->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, NULL);
+ return request;
}
-void smpi_process_init()
-{
- smx_host_t host;
- int i;
- smpi_host_data_t hdata;
+MPI_Request smpi_mpi_irecv(void* buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm) {
+ MPI_Request request;
+
+ 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->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_global->running_hosts_count++;
+void smpi_mpi_recv(void* buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm, MPI_Status* status) {
+ MPI_Request request;
- // initialize some local variables
- host = SIMIX_host_self();
+ request = smpi_mpi_irecv(buf, count, datatype, src, tag, comm);
+ smpi_mpi_wait(&request, status);
+}
- hdata = xbt_new(s_smpi_host_data_t, 1);
- SIMIX_host_set_data(host, hdata);
+void smpi_mpi_send(void* buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm) {
+ MPI_Request request;
- for (i = 0; i < smpi_global->host_count && host != smpi_global->hosts[i]; i++);
+ request = smpi_mpi_isend(buf, count, datatype, src, tag, comm);
+ smpi_mpi_wait(&request, MPI_STATUS_IGNORE);
+}
- hdata->index = i;
- hdata->mutex = SIMIX_mutex_init();
- hdata->cond = SIMIX_cond_init();
- hdata->main = SIMIX_process_self();
- hdata->sender = SIMIX_process_create("smpi_sender",
- smpi_sender, hdata,
- SIMIX_host_get_name(SIMIX_host_self()), 0, NULL,
- /*props */ NULL);
- hdata->receiver = SIMIX_process_create("smpi_receiver",
- smpi_receiver, hdata,
- SIMIX_host_get_name(SIMIX_host_self()), 0, NULL,
- /*props */ NULL);
- return;
+void smpi_mpi_sendrecv(void* sendbuf, int sendcount, MPI_Datatype sendtype, int dst, int sendtag, void* recvbuf, int recvcount, MPI_Datatype recvtype, int src, int recvtag, MPI_Comm comm, MPI_Status* status) {
+ MPI_Request requests[2];
+ MPI_Status stats[2];
+
+ requests[0] = smpi_mpi_isend(sendbuf, sendcount, sendtype, dst, sendtag, comm);
+ requests[1] = smpi_mpi_irecv(recvbuf, recvcount, recvtype, src, recvtag, comm);
+ smpi_mpi_waitall(2, requests, stats);
+ if(status != MPI_STATUS_IGNORE) {
+ // Copy receive status
+ memcpy(status, &stats[1], sizeof(MPI_Status));
+ }
}
-void smpi_process_finalize()
-{
- int i;
+static void finish_wait(MPI_Request* request, MPI_Status* status) {
+ MPI_Request data = (*request)->data;
- i = --smpi_global->running_hosts_count;
+ 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;
+ }
+ DEBUG3("finishing wait for %p [data = %p, complete = %d]", *request, data, data->complete);
+ // data == *request if sender is first to finish its wait
+ // data != *request if receiver is first to finish its wait
+ if(data->complete == 0) {
+ // first arrives here
+ data->complete = 1;
+ if(data != *request) {
+ // receveiver cleans its part
+ xbt_free(*request);
+ }
+ } else {
+ // second arrives here
+ if(data != *request) {
+ // receiver cleans everything
+ xbt_free(data);
+ }
+ SIMIX_rdv_destroy((*request)->rdv);
+ xbt_free(*request);
+ }
+ *request = MPI_REQUEST_NULL;
+}
- SIMIX_mutex_destroy(smpi_host_mutex());
- SIMIX_cond_destroy(smpi_host_cond());
+int smpi_mpi_test(MPI_Request* request, MPI_Status* status) {
+ MPI_Request data = (*request)->data;
+ int flag = data && data->complete == 1;
- if (0 >= i) {
+ if(flag) {
+ SIMIX_communication_destroy((*request)->pair);
+ finish_wait(request, status);
+ }
+ return flag;
+}
- // wake up senders/receivers
- for (i = 0; i < smpi_global->host_count; i++) {
- if (SIMIX_process_is_suspended(smpi_global->sender_processes[i])) {
- SIMIX_process_resume(smpi_global->sender_processes[i]);
- }
- if (SIMIX_process_is_suspended(smpi_global->receiver_processes[i])) {
- SIMIX_process_resume(smpi_global->receiver_processes[i]);
+int smpi_mpi_testany(int count, MPI_Request requests[], int* index, MPI_Status* status) {
+ MPI_Request data;
+ int i, flag;
+
+ *index = MPI_UNDEFINED;
+ flag = 0;
+ for(i = 0; i < count; i++) {
+ if(requests[i] != MPI_REQUEST_NULL) {
+ 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;
+ break;
}
}
+ }
+ return flag;
+}
- SIMIX_mutex_destroy(smpi_mpi_global->mpi_comm_world->barrier_mutex);
- SIMIX_cond_destroy(smpi_mpi_global->mpi_comm_world->barrier_cond);
- xbt_free(smpi_mpi_global->mpi_comm_world);
+void smpi_mpi_wait(MPI_Request* request, MPI_Status* status) {
+ MPI_Request data = (*request)->data;
- xbt_free(smpi_mpi_global->mpi_byte);
- xbt_free(smpi_mpi_global->mpi_int);
- xbt_free(smpi_mpi_global->mpi_double);
+ 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);
+}
- xbt_free(smpi_mpi_global->mpi_land);
- xbt_free(smpi_mpi_global->mpi_sum);
+int smpi_mpi_waitany(int count, MPI_Request requests[], MPI_Status* status) {
+ xbt_dynar_t comms;
+ MPI_Request data;
+ int i, size, index;
+ int* map;
+
+ index = MPI_UNDEFINED;
+ if(count > 0) {
+ // First check for already completed requests
+ for(i = 0; i < count; i++) {
+ if(requests[i] != MPI_REQUEST_NULL) {
+ 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;
+ }
+ }
+ }
+ if(index == MPI_UNDEFINED) {
+ // Otherwise, wait for a request to complete
+ comms = xbt_dynar_new(sizeof(smx_comm_t), NULL);
+ map = xbt_new(int, count);
+ size = 0;
+ DEBUG0("Wait for one of");
+ for(i = 0; i < count; i++) {
+ if(requests[i] != MPI_REQUEST_NULL && requests[i]->complete == 0) {
+ DEBUG4(" request %p [src = %d, dst = %d, tag = %d]",
+ requests[i], requests[i]->src, requests[i]->dst, requests[i]->tag);
+ xbt_dynar_push(comms, &requests[i]->pair);
+ map[size] = i;
+ size++;
+ }
+ }
+ if(size > 0) {
+ index = SIMIX_network_waitany(comms);
+ index = map[index];
+ }
+ xbt_free(map);
+ xbt_dynar_free_container(&comms);
+ }
+ if(index != MPI_UNDEFINED) {
+ finish_wait(&requests[index], status);
+ }
+ }
+ return index;
+}
- xbt_free(smpi_mpi_global);
+void smpi_mpi_waitall(int count, MPI_Request requests[], MPI_Status status[]) {
+ int index;
+ MPI_Status stat;
+ while(count > 0) {
+ index = smpi_mpi_waitany(count, requests, &stat);
+ if(index == MPI_UNDEFINED) {
+ break;
+ }
+ if(status != MPI_STATUS_IGNORE) {
+ memcpy(&status[index], &stat, sizeof(stat));
+ }
+ // Move the last request to the found position
+ requests[index] = requests[count - 1];
+ requests[count - 1] = MPI_REQUEST_NULL;
+ count--;
}
+}
+int smpi_mpi_waitsome(int incount, MPI_Request requests[], int* indices, MPI_Status status[]) {
+ MPI_Request data;
+ int i, count;
+
+ count = 0;
+ for(i = 0; i < incount; i++) {
+ if(requests[i] != MPI_REQUEST_NULL) {
+ 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++;
+ }
+ }
+ }
+ return count;
}
-int smpi_mpi_barrier(smpi_mpi_communicator_t comm)
-{
+void smpi_mpi_bcast(void* buf, int count, MPI_Datatype datatype, int root, MPI_Comm comm) {
+ // arity=2: a binary tree, arity=4 seem to be a good setting (see P2P-MPI))
+ nary_tree_bcast(buf, count, datatype, root, comm, 4);
+}
- SIMIX_mutex_lock(comm->barrier_mutex);
- ++comm->barrier_count;
- if (comm->barrier_count > comm->size) { // only happens on second barrier...
- comm->barrier_count = 0;
- } else if (comm->barrier_count == comm->size) {
- SIMIX_cond_broadcast(comm->barrier_cond);
- }
- while (comm->barrier_count < comm->size) {
- SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
- }
- SIMIX_mutex_unlock(comm->barrier_mutex);
+void smpi_mpi_barrier(MPI_Comm comm) {
+ // arity=2: a binary tree, arity=4 seem to be a good setting (see P2P-MPI))
+ nary_tree_barrier(comm, 4);
+}
- return MPI_SUCCESS;
+void smpi_mpi_gather(void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf, int recvcount, MPI_Datatype recvtype, int root, MPI_Comm comm) {
+ int system_tag = 666;
+ int rank, size, src, index, sendsize, recvsize;
+ MPI_Request* requests;
+
+ rank = smpi_comm_rank(comm);
+ size = smpi_comm_size(comm);
+ if(rank != root) {
+ // Send buffer to root
+ smpi_mpi_send(sendbuf, sendcount, sendtype, root, system_tag, comm);
+ } else {
+ sendsize = smpi_datatype_size(sendtype);
+ recvsize = smpi_datatype_size(recvtype);
+ // Local copy from root
+ memcpy(&((char*)recvbuf)[root * recvcount * recvsize], sendbuf, sendcount * sendsize * sizeof(char));
+ // Receive buffers from senders
+ requests = xbt_new(MPI_Request, size - 1);
+ index = 0;
+ for(src = 0; src < size; src++) {
+ if(src != root) {
+ requests[index] = smpi_mpi_irecv(&((char*)recvbuf)[src * recvcount * recvsize], recvcount, recvtype, src, system_tag, comm);
+ index++;
+ }
+ }
+ // Wait for completion of irecv's.
+ smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE);
+ xbt_free(requests);
+ }
}
-int smpi_mpi_isend(smpi_mpi_request_t request)
-{
- int retval = MPI_SUCCESS;
- int index = smpi_host_index();
+void smpi_mpi_gatherv(void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf, int* recvcounts, int* displs, MPI_Datatype recvtype, int root, MPI_Comm comm) {
+ int system_tag = 666;
+ int rank, size, src, index, sendsize;
+ MPI_Request* requests;
- if (NULL == request) {
- retval = MPI_ERR_INTERN;
+ rank = smpi_comm_rank(comm);
+ size = smpi_comm_size(comm);
+ if(rank != root) {
+ // Send buffer to root
+ smpi_mpi_send(sendbuf, sendcount, sendtype, root, system_tag, comm);
} else {
- xbt_fifo_push(smpi_global->pending_send_request_queues[index], request);
+ sendsize = smpi_datatype_size(sendtype);
+ // Local copy from root
+ memcpy(&((char*)recvbuf)[displs[root]], sendbuf, sendcount * sendsize * sizeof(char));
+ // Receive buffers from senders
+ requests = xbt_new(MPI_Request, size - 1);
+ index = 0;
+ for(src = 0; src < size; src++) {
+ if(src != root) {
+ requests[index] = smpi_mpi_irecv(&((char*)recvbuf)[displs[src]], recvcounts[src], recvtype, src, system_tag, comm);
+ index++;
+ }
+ }
+ // Wait for completion of irecv's.
+ smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE);
+ xbt_free(requests);
+ }
+}
- if (SIMIX_process_is_suspended(smpi_global->sender_processes[index])) {
- SIMIX_process_resume(smpi_global->sender_processes[index]);
+void smpi_mpi_allgather(void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf, int recvcount, MPI_Datatype recvtype, MPI_Comm comm) {
+ int system_tag = 666;
+ int rank, size, other, index, sendsize, recvsize;
+ MPI_Request* requests;
+
+ rank = smpi_comm_rank(comm);
+ size = smpi_comm_size(comm);
+ sendsize = smpi_datatype_size(sendtype);
+ recvsize = smpi_datatype_size(recvtype);
+ // Local copy from self
+ memcpy(&((char*)recvbuf)[rank * recvcount * recvsize], sendbuf, sendcount * sendsize * sizeof(char));
+ // Send/Recv buffers to/from others;
+ requests = xbt_new(MPI_Request, 2 * (size - 1));
+ index = 0;
+ for(other = 0; other < size; other++) {
+ if(other != rank) {
+ requests[index] = smpi_mpi_isend(sendbuf, sendcount, sendtype, other, system_tag, comm);
+ index++;
+ requests[index] = smpi_mpi_irecv(&((char*)recvbuf)[other * recvcount * recvsize], recvcount, recvtype, other, system_tag, comm);
+ index++;
}
}
+ // Wait for completion of all comms.
+ smpi_mpi_waitall(2 * (size - 1), requests, MPI_STATUS_IGNORE);
+ xbt_free(requests);
+}
- return retval;
+void smpi_mpi_allgatherv(void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf, int* recvcounts, int* displs, MPI_Datatype recvtype, MPI_Comm comm) {
+ int system_tag = 666;
+ int rank, size, other, index, sendsize, recvsize;
+ MPI_Request* requests;
+
+ rank = smpi_comm_rank(comm);
+ size = smpi_comm_size(comm);
+ sendsize = smpi_datatype_size(sendtype);
+ recvsize = smpi_datatype_size(recvtype);
+ // Local copy from self
+ memcpy(&((char*)recvbuf)[displs[rank]], sendbuf, sendcount * sendsize * sizeof(char));
+ // Send buffers to others;
+ requests = xbt_new(MPI_Request, 2 * (size - 1));
+ index = 0;
+ for(other = 0; other < size; other++) {
+ if(other != rank) {
+ requests[index] = smpi_mpi_isend(sendbuf, sendcount, sendtype, other, system_tag, comm);
+ index++;
+ requests[index] = smpi_mpi_irecv(&((char*)recvbuf)[displs[other]], recvcounts[other], recvtype, other, system_tag, comm);
+ index++;
+ }
+ }
+ // Wait for completion of all comms.
+ smpi_mpi_waitall(2 * (size - 1), requests, MPI_STATUS_IGNORE);
+ xbt_free(requests);
}
-int smpi_mpi_irecv(smpi_mpi_request_t request)
-{
- int retval = MPI_SUCCESS;
- int index = smpi_host_index();
+void smpi_mpi_scatter(void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf, int recvcount, MPI_Datatype recvtype, int root, MPI_Comm comm) {
+ int system_tag = 666;
+ int rank, size, dst, index, sendsize, recvsize;
+ MPI_Request* requests;
- if (NULL == request) {
- retval = MPI_ERR_INTERN;
+ rank = smpi_comm_rank(comm);
+ size = smpi_comm_size(comm);
+ if(rank != root) {
+ // Recv buffer from root
+ smpi_mpi_recv(recvbuf, recvcount, recvtype, root, system_tag, comm, MPI_STATUS_IGNORE);
} else {
- xbt_fifo_push(smpi_global->pending_recv_request_queues[index], request);
-
- if (SIMIX_process_is_suspended(smpi_global->receiver_processes[index])) {
- SIMIX_process_resume(smpi_global->receiver_processes[index]);
+ sendsize = smpi_datatype_size(sendtype);
+ recvsize = smpi_datatype_size(recvtype);
+ // Local copy from root
+ memcpy(recvbuf, &((char*)sendbuf)[root * sendcount * sendsize], recvcount * recvsize * sizeof(char));
+ // Send buffers to receivers
+ requests = xbt_new(MPI_Request, size - 1);
+ index = 0;
+ for(dst = 0; dst < size; dst++) {
+ if(dst != root) {
+ requests[index] = smpi_mpi_isend(&((char*)sendbuf)[dst * sendcount * sendsize], sendcount, sendtype, dst, system_tag, comm);
+ index++;
+ }
}
+ // Wait for completion of isend's.
+ smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE);
+ xbt_free(requests);
}
-
- return retval;
}
-int smpi_mpi_wait(smpi_mpi_request_t request, smpi_mpi_status_t * status)
-{
- int retval = MPI_SUCCESS;
+void smpi_mpi_scatterv(void* sendbuf, int* sendcounts, int* displs, MPI_Datatype sendtype, void* recvbuf, int recvcount, MPI_Datatype recvtype, int root, MPI_Comm comm) {
+ int system_tag = 666;
+ int rank, size, dst, index, sendsize, recvsize;
+ MPI_Request* requests;
- if (NULL == request) {
- retval = MPI_ERR_INTERN;
+ rank = smpi_comm_rank(comm);
+ size = smpi_comm_size(comm);
+ if(rank != root) {
+ // Recv buffer from root
+ smpi_mpi_recv(recvbuf, recvcount, recvtype, root, system_tag, comm, MPI_STATUS_IGNORE);
} else {
- SIMIX_mutex_lock(request->mutex);
- while (!request->completed) {
- SIMIX_cond_wait(request->cond, request->mutex);
+ sendsize = smpi_datatype_size(sendtype);
+ recvsize = smpi_datatype_size(recvtype);
+ // Local copy from root
+ memcpy(recvbuf, &((char*)sendbuf)[displs[root]], recvcount * recvsize * sizeof(char));
+ // Send buffers to receivers
+ requests = xbt_new(MPI_Request, size - 1);
+ index = 0;
+ for(dst = 0; dst < size; dst++) {
+ if(dst != root) {
+ requests[index] = smpi_mpi_isend(&((char*)sendbuf)[displs[dst]], sendcounts[dst], sendtype, dst, system_tag, comm);
+ index++;
+ }
+ }
+ // Wait for completion of isend's.
+ smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE);
+ xbt_free(requests);
+ }
+}
+
+void smpi_mpi_reduce(void* sendbuf, void* recvbuf, int count, MPI_Datatype datatype, MPI_Op op, int root, MPI_Comm comm) {
+ int system_tag = 666;
+ int rank, size, src, index, datasize;
+ MPI_Request* requests;
+ void** tmpbufs;
+
+ rank = smpi_comm_rank(comm);
+ size = smpi_comm_size(comm);
+ if(rank != root) {
+ // Send buffer to root
+ smpi_mpi_send(sendbuf, count, datatype, root, system_tag, comm);
+ } else {
+ datasize = smpi_datatype_size(datatype);
+ // Local copy from root
+ memcpy(recvbuf, sendbuf, count * datasize * sizeof(char));
+ // Receive buffers from senders
+ //TODO: make a MPI_barrier here ?
+ requests = xbt_new(MPI_Request, size - 1);
+ tmpbufs = xbt_new(void*, size - 1);
+ index = 0;
+ for(src = 0; src < size; src++) {
+ if(src != root) {
+ tmpbufs[index] = xbt_malloc(count * datasize);
+ requests[index] = smpi_mpi_irecv(tmpbufs[index], count, datatype, src, system_tag, comm);
+ index++;
+ }
}
- if (NULL != status) {
- status->MPI_SOURCE = request->src;
- status->MPI_TAG = request->tag;
- status->MPI_ERROR = MPI_SUCCESS;
+ // Wait for completion of irecv's.
+ for(src = 0; src < size - 1; src++) {
+ index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE);
+ if(index == MPI_UNDEFINED) {
+ break;
+ }
+ smpi_op_apply(op, tmpbufs[index], recvbuf, &count, &datatype);
+ }
+ for(index = 0; index < size - 1; index++) {
+ xbt_free(tmpbufs[index]);
}
- SIMIX_mutex_unlock(request->mutex);
+ xbt_free(tmpbufs);
+ xbt_free(requests);
}
+}
- return retval;
+void smpi_mpi_allreduce(void* sendbuf, void* recvbuf, int count, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm) {
+ smpi_mpi_reduce(sendbuf, recvbuf, count, datatype, op, 0, comm);
+ smpi_mpi_bcast(recvbuf, count, datatype, 0, comm);
+
+/*
+FIXME: buggy implementation
+
+ int system_tag = 666;
+ 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));
+ // Send/Recv buffers to/from others;
+ //TODO: make a MPI_barrier here ?
+ requests = xbt_new(MPI_Request, 2 * (size - 1));
+ tmpbufs = xbt_new(void*, size - 1);
+ index = 0;
+ for(other = 0; other < size; other++) {
+ if(other != rank) {
+ tmpbufs[index / 2] = xbt_malloc(count * datasize);
+ requests[index] = smpi_mpi_isend(sendbuf, count, datatype, other, system_tag, comm);
+ requests[index + 1] = smpi_mpi_irecv(tmpbufs[index / 2], count, datatype, other, system_tag, comm);
+ index += 2;
+ }
+ }
+ // Wait for completion of all comms.
+ for(other = 0; other < 2 * (size - 1); other++) {
+ index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE);
+ if(index == MPI_UNDEFINED) {
+ break;
+ }
+ if((index & 1) == 1) {
+ // Request is odd: it's a irecv
+ smpi_op_apply(op, tmpbufs[index / 2], recvbuf, &count, &datatype);
+ }
+ }
+ for(index = 0; index < size - 1; index++) {
+ xbt_free(tmpbufs[index]);
+ }
+ xbt_free(tmpbufs);
+ xbt_free(requests);
+*/
}
