X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/6b0d7da249c3fd6b9ab682bdcdabdf6a26705140..99e8fb90a14e543c1a4b2feaf22a5c0670c2951a:/src/smpi/smpi_mpi.c diff --git a/src/smpi/smpi_mpi.c b/src/smpi/smpi_mpi.c index 79ad9bf43e..c1f52536d6 100644 --- a/src/smpi/smpi_mpi.c +++ b/src/smpi/smpi_mpi.c @@ -1,324 +1,734 @@ + + #include "private.h" +#include "smpi_coll_private.h" -XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_mpi, smpi, "Logging specific to SMPI (mpi)"); +XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_mpi, smpi, + "Logging specific to SMPI (mpi)"); int SMPI_MPI_Init(int *argc, char ***argv) { - smpi_mpi_init(); - smpi_bench_begin(); - return MPI_SUCCESS; + smpi_process_init(argc, argv); + smpi_bench_begin(); + return MPI_SUCCESS; } int SMPI_MPI_Finalize() { - smpi_bench_end(); - smpi_mpi_finalize(); - return MPI_SUCCESS; + smpi_bench_end(); + smpi_process_finalize(); + return MPI_SUCCESS; } // right now this just exits the current node, should send abort signal to all -// hosts in the communicator; +// hosts in the communicator (TODO) int SMPI_MPI_Abort(MPI_Comm comm, int errorcode) { - smpi_exit(errorcode); - return 0; + smpi_exit(errorcode); + return 0; } int SMPI_MPI_Comm_size(MPI_Comm comm, int *size) { - int retval = MPI_SUCCESS; + int retval = MPI_SUCCESS; - smpi_bench_end(); + smpi_bench_end(); - if (NULL == comm) { - retval = MPI_ERR_COMM; - } else if (NULL == size) { - retval = MPI_ERR_ARG; - } else { - *size = comm->size; - } + if (NULL == comm) { + retval = MPI_ERR_COMM; + } else if (NULL == size) { + retval = MPI_ERR_ARG; + } else { + *size = comm->size; + } - smpi_bench_begin(); + smpi_bench_begin(); - return retval; + return retval; } int SMPI_MPI_Comm_rank(MPI_Comm comm, int *rank) { - int retval = MPI_SUCCESS; + int retval = MPI_SUCCESS; - smpi_bench_end(); + smpi_bench_end(); - if (NULL == comm) { - retval = MPI_ERR_COMM; - } else if (NULL == rank) { - retval = MPI_ERR_ARG; - } else { - *rank = smpi_mpi_comm_rank(comm); - } + if (NULL == comm) { + retval = MPI_ERR_COMM; + } else if (NULL == rank) { + retval = MPI_ERR_ARG; + } else { + *rank = smpi_mpi_comm_rank(comm); + } - smpi_bench_begin(); + smpi_bench_begin(); - return retval; + return retval; } -int SMPI_MPI_Type_size(MPI_Datatype datatype, size_t *size) +int SMPI_MPI_Type_size(MPI_Datatype datatype, size_t * size) { - int retval = MPI_SUCCESS; + int retval = MPI_SUCCESS; - smpi_bench_end(); + smpi_bench_end(); - if (NULL == datatype) { - retval = MPI_ERR_TYPE; - } else if (NULL == size) { - retval = MPI_ERR_ARG; - } else { - *size = datatype->size; - } + if (NULL == datatype) { + retval = MPI_ERR_TYPE; + } else if (NULL == size) { + retval = MPI_ERR_ARG; + } else { + *size = datatype->size; + } - smpi_bench_begin(); + smpi_bench_begin(); - return retval; + return retval; } int SMPI_MPI_Barrier(MPI_Comm comm) { - int retval = MPI_SUCCESS; + int retval = MPI_SUCCESS; + int arity=4; + + smpi_bench_end(); - smpi_bench_end(); + if (NULL == comm) { + retval = MPI_ERR_COMM; + } else { - if (NULL == comm) { - retval = MPI_ERR_COMM; - } else { - retval = smpi_mpi_barrier(comm); - } + /* + * original implemantation: + * retval = smpi_mpi_barrier(comm); + * this one is unrealistic: it just cond_waits, means no time. + */ + retval = nary_tree_barrier( comm, arity ); + } - smpi_bench_begin(); + smpi_bench_begin(); - return retval; + return retval; } -int SMPI_MPI_Irecv(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm, MPI_Request *request) +int SMPI_MPI_Irecv(void *buf, int count, MPI_Datatype datatype, int src, + int tag, MPI_Comm comm, MPI_Request * request) { - int retval = MPI_SUCCESS; + int retval = MPI_SUCCESS; - smpi_bench_end(); + smpi_bench_end(); - retval = smpi_create_request(buf, count, datatype, src, 0, tag, comm, request); - if (NULL != *request && MPI_SUCCESS == retval) { - retval = smpi_mpi_irecv(*request); - } + retval = smpi_create_request(buf, count, datatype, src, 0, tag, comm, + request); + if (NULL != *request && MPI_SUCCESS == retval) { + retval = smpi_mpi_irecv(*request); + } - smpi_bench_begin(); + smpi_bench_begin(); - return retval; + return retval; } -int SMPI_MPI_Recv(void *buf, int count, MPI_Datatype datatype, int src, int tag, MPI_Comm comm, MPI_Status *status) +int SMPI_MPI_Recv(void *buf, int count, MPI_Datatype datatype, int src, + int tag, MPI_Comm comm, MPI_Status * status) { - int retval = MPI_SUCCESS; - smpi_mpi_request_t request; + int retval = MPI_SUCCESS; + smpi_mpi_request_t request; - smpi_bench_end(); + smpi_bench_end(); - retval = smpi_create_request(buf, count, datatype, src, 0, tag, comm, &request); - if (NULL != request && MPI_SUCCESS == retval) { - retval = smpi_mpi_irecv(request); - if (MPI_SUCCESS == retval) { - retval = smpi_mpi_wait(request, status); - } - xbt_mallocator_release(smpi_global->request_mallocator, request); - } + retval = smpi_create_request(buf, count, datatype, src, 0, tag, comm, + &request); + if (NULL != request && MPI_SUCCESS == retval) { + retval = smpi_mpi_irecv(request); + if (MPI_SUCCESS == retval) { + retval = smpi_mpi_wait(request, status); + } + xbt_mallocator_release(smpi_global->request_mallocator, request); + } - smpi_bench_begin(); + smpi_bench_begin(); - return retval; + return retval; } -int SMPI_MPI_Isend(void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm, MPI_Request *request) +int SMPI_MPI_Isend(void *buf, int count, MPI_Datatype datatype, int dst, + int tag, MPI_Comm comm, MPI_Request * request) { - int retval = MPI_SUCCESS; + int retval = MPI_SUCCESS; - smpi_bench_end(); + smpi_bench_end(); - retval = smpi_create_request(buf, count, datatype, 0, dst, tag, comm, request); - if (NULL != *request && MPI_SUCCESS == retval) { - retval = smpi_mpi_isend(*request); - } + retval = smpi_create_request(buf, count, datatype, 0, dst, tag, comm, + request); + if (NULL != *request && MPI_SUCCESS == retval) { + retval = smpi_mpi_isend(*request); + } - smpi_bench_begin(); + smpi_bench_begin(); - return retval; + return retval; } -int SMPI_MPI_Send(void *buf, int count, MPI_Datatype datatype, int dst, int tag, MPI_Comm comm) +int SMPI_MPI_Send(void *buf, int count, MPI_Datatype datatype, int dst, + int tag, MPI_Comm comm) { - int retval = MPI_SUCCESS; - smpi_mpi_request_t request; + int retval = MPI_SUCCESS; + smpi_mpi_request_t request; - smpi_bench_end(); + smpi_bench_end(); - retval = smpi_create_request(buf, count, datatype, 0, dst, tag, comm, &request); - if (NULL != request && MPI_SUCCESS == retval) { - retval = smpi_mpi_isend(request); - if (MPI_SUCCESS == retval) { - smpi_mpi_wait(request, MPI_STATUS_IGNORE); - } - xbt_mallocator_release(smpi_global->request_mallocator, request); - } + retval = smpi_create_request(buf, count, datatype, 0, dst, tag, comm, + &request); + if (NULL != request && MPI_SUCCESS == retval) { + retval = smpi_mpi_isend(request); + if (MPI_SUCCESS == retval) { + smpi_mpi_wait(request, MPI_STATUS_IGNORE); + } + xbt_mallocator_release(smpi_global->request_mallocator, request); + } - smpi_bench_begin(); + smpi_bench_begin(); - return retval; + return retval; } -int SMPI_MPI_Wait(MPI_Request *request, MPI_Status *status) { - return smpi_mpi_wait(*request, status); + +/** + * MPI_Sendrecv internal level + **/ +int smpi_mpi_sendrecv(void *sendbuf, int sendcount, MPI_Datatype sendtype, int dest, int sendtag, + void *recvbuf, int recvcount, MPI_Datatype recvtype, int source, int recvtag, + MPI_Comm comm, MPI_Status *status) +{ +int rank; +int retval = MPI_SUCCESS; +smpi_mpi_request_t srequest; +smpi_mpi_request_t rrequest; + + rank = smpi_mpi_comm_rank(comm); + + /* send */ + retval = smpi_create_request(sendbuf, sendcount, sendtype, + rank,dest,sendtag, + comm, &srequest); + smpi_mpi_isend(srequest); + + /* recv */ + retval = smpi_create_request(recvbuf, recvcount, recvtype, + source, rank,recvtag, + comm, &rrequest); + smpi_mpi_irecv(rrequest); + + smpi_mpi_wait(srequest, MPI_STATUS_IGNORE); + //printf("[%d] isend request src=%d dst=%d tag=%d COMPLETED (retval=%d) \n",rank,rank,dest,sendtag,retval); + smpi_mpi_wait(rrequest, MPI_STATUS_IGNORE); + //printf("[%d] irecv request src=%d -> dst=%d tag=%d COMPLETED (retval=%d)\n",rank,source,rank,recvtag,retval); + + return(retval); } +/** + * MPI_Sendrecv user entry point + **/ +int SMPI_MPI_Sendrecv(void *sendbuf, int sendcount, MPI_Datatype sendtype, int dest, int sendtag, + void *recvbuf, int recvcount, MPI_Datatype recvtype, int source, int recvtag, + MPI_Comm comm, MPI_Status *status) +{ +int retval = MPI_SUCCESS; -int SMPI_MPI_Bcast(void *buf, int count, MPI_Datatype datatype, int root, MPI_Comm comm) { + smpi_bench_end(); + smpi_mpi_sendrecv( sendbuf, sendcount, sendtype, dest, sendtag, + recvbuf, recvcount, recvtype, source, recvtag, + comm, status); + smpi_bench_begin(); - int retval = MPI_SUCCESS; - int rank; - smpi_mpi_request_t request; + return retval; - smpi_bench_end(); + +} - rank = smpi_mpi_comm_rank(comm); +/** + * MPI_Wait and friends + **/ +int SMPI_MPI_Wait(MPI_Request * request, MPI_Status * status) +{ + return smpi_mpi_wait(*request, status); +} - if (rank == root) { - retval = smpi_create_request(buf, count, datatype, root, (root + 1) % comm->size, 0, comm, &request); - request->forward = comm->size - 1; - smpi_mpi_isend(request); - } else { - retval = smpi_create_request(buf, count, datatype, MPI_ANY_SOURCE, rank, 0, comm, &request); - smpi_mpi_irecv(request); - } +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); +} - smpi_mpi_wait(request, MPI_STATUS_IGNORE); - xbt_mallocator_release(smpi_global->request_mallocator, request); +/** + * MPI_Bcast + **/ - smpi_bench_begin(); +/** + * flat bcast + **/ +int flat_tree_bcast(void *buf, int count, MPI_Datatype datatype, int root, MPI_Comm comm); +int flat_tree_bcast(void *buf, int count, MPI_Datatype datatype, int root, + MPI_Comm comm) +{ + int rank; + int retval = MPI_SUCCESS; + smpi_mpi_request_t request; + + rank = smpi_mpi_comm_rank(comm); + if (rank == root) { + retval = smpi_create_request(buf, count, datatype, root, + (root + 1) % comm->size, 0, comm, &request); + request->forward = comm->size - 1; + smpi_mpi_isend(request); + } else { + retval = smpi_create_request(buf, count, datatype, MPI_ANY_SOURCE, rank, + 0, comm, &request); + smpi_mpi_irecv(request); + } + + smpi_mpi_wait(request, MPI_STATUS_IGNORE); + xbt_mallocator_release(smpi_global->request_mallocator, request); + + return(retval); - return retval; +} +/** + * Bcast internal level + **/ +int smpi_mpi_bcast(void *buf, int count, MPI_Datatype datatype, int root, + MPI_Comm comm) +{ + int retval = MPI_SUCCESS; + //retval = flat_tree_bcast(buf, count, datatype, root, comm); + retval = nary_tree_bcast(buf, count, datatype, root, comm, 2 ); + return retval; } -// FIXME: should be in utilities -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; +/** + * Bcast user entry point + **/ +int SMPI_MPI_Bcast(void *buf, int count, MPI_Datatype datatype, int root, + MPI_Comm comm) +{ + int retval = MPI_SUCCESS; - if (x[1] < y[1]) return -1; + smpi_bench_end(); + smpi_mpi_bcast(buf,count,datatype,root,comm); + smpi_bench_begin(); - if (x[1] == y[1]) { - if (x[0] < y[0]) return -1; - if (x[0] == y[0]) return 0; - return 1; - } + return retval; +} - return 1; + + +#ifdef DEBUG_REDUCE +/** + * debugging helper function + **/ +static void print_buffer_int(void *buf, int len, char *msg, int rank) +{ + int tmp, *v; + printf("**[%d] %s: ", rank, msg); + for (tmp = 0; tmp < len; tmp++) { + v = buf; + printf("[%d]", v[tmp]); + } + printf("\n"); + free(msg); +} +static void print_buffer_double(void *buf, int len, char *msg, int rank) +{ + int tmp; + double *v; + printf("**[%d] %s: ", rank, msg); + for (tmp = 0; tmp < len; tmp++) { + v = buf; + printf("[%lf]", v[tmp]); + } + printf("\n"); + free(msg); } -// FIXME: needs to return null in event of MPI_UNDEFINED color... -// FIXME: seriously, this isn't pretty -int SMPI_MPI_Comm_split(MPI_Comm comm, int color, int key, MPI_Comm *comm_out) + +#endif +/** + * MPI_Reduce internal level + **/ +int smpi_mpi_reduce(void *sendbuf, void *recvbuf, int count, + MPI_Datatype datatype, MPI_Op op, int root, MPI_Comm comm) { - int retval = MPI_SUCCESS; - - int index, rank; - smpi_mpi_request_t request; - int colorkey[2]; - smpi_mpi_status_t status; - - smpi_bench_end(); - - // FIXME: need to test parameters - - index = smpi_host_index(); - rank = comm->index_to_rank_map[index]; - - if (0 == rank) { - int colormap[comm->size]; - int keymap[comm->size]; - int rankkeymap[comm->size * 2]; - int i, j; - smpi_mpi_communicator_t tempcomm = NULL; - int colortmp; - int keycount; - int indextmp; - - colormap[0] = color; - keymap[0] = key; - - // FIXME: use scatter/gather or similar instead of individual comms - for (i = 1; i < comm->size; i++) { - retval = smpi_create_request(colorkey, 2, MPI_INT, MPI_ANY_SOURCE, - rank, MPI_ANY_TAG, comm, &request); - smpi_mpi_irecv(request); - smpi_mpi_wait(request, &status); - colormap[status.MPI_SOURCE] = colorkey[0]; - keymap[status.MPI_SOURCE] = colorkey[1]; - xbt_mallocator_release(smpi_global->request_mallocator, request); - } - - for (i = 0; i < comm->size; i++) { - if (-1 == colormap[i]) { - continue; - } - colortmp = colormap[i]; - keycount = 0; - for (j = i; j < comm->size; j++) { - if(colortmp == colormap[j]) { - colormap[j] = -1; - rankkeymap[keycount * 2] = j; - rankkeymap[keycount * 2 + 1] = keymap[j]; - keycount++; - } - } - qsort(rankkeymap, keycount, sizeof(int) * 2, &smpi_compare_rankkeys); - tempcomm = xbt_new(s_smpi_mpi_communicator_t, 1); - tempcomm->barrier_count = 0; - tempcomm->size = keycount; - tempcomm->barrier_mutex = SIMIX_mutex_init(); - tempcomm->barrier_cond = SIMIX_cond_init(); - tempcomm->rank_to_index_map = xbt_new(int, keycount); - tempcomm->index_to_rank_map = xbt_new(int, smpi_global->host_count); - for (j = 0; j < smpi_global->host_count; j++) { - tempcomm->index_to_rank_map[j] = -1; - } - for (j = 0; j < keycount; j++) { - indextmp = comm->rank_to_index_map[rankkeymap[j*2]]; - tempcomm->rank_to_index_map[j] = indextmp; - tempcomm->index_to_rank_map[indextmp] = j; + int retval = MPI_SUCCESS; + int rank; + int size; + int i; + int tag = 0; + smpi_mpi_request_t *requests; + smpi_mpi_request_t request; + + smpi_bench_end(); + + rank = smpi_mpi_comm_rank(comm); + size = comm->size; + + if (rank != root) { // if i am not ROOT, simply send my buffer to root + +#ifdef DEBUG_REDUCE + print_buffer_int(sendbuf, count, xbt_strdup("sndbuf"), rank); +#endif + retval = smpi_create_request(sendbuf, count, datatype, rank, root, tag, comm, + &request); + smpi_mpi_isend(request); + smpi_mpi_wait(request, MPI_STATUS_IGNORE); + xbt_mallocator_release(smpi_global->request_mallocator, request); + + } else { + // i am the ROOT: wait for all buffers by creating one request by sender + int src; + requests = xbt_malloc((size-1) * sizeof(smpi_mpi_request_t)); + + void **tmpbufs = xbt_malloc((size-1) * sizeof(void *)); + for (i = 0; i < size-1; i++) { + // we need 1 buffer per request to store intermediate receptions + tmpbufs[i] = xbt_malloc(count * datatype->size); + } + // root: initiliaze recv buf with my own snd buf + memcpy(recvbuf, sendbuf, count * datatype->size * sizeof(char)); + + // 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 < size-1; i++) { + // reminder: for smpi_create_request() the src is always the process sending. + src = i < root ? i : i + 1; + retval = smpi_create_request(tmpbufs[i], count, datatype, + src, root, tag, comm, &(requests[i])); + if (NULL != requests[i] && MPI_SUCCESS == retval) { + if (MPI_SUCCESS == retval) { + smpi_mpi_irecv(requests[i]); + } + } + } + // now, wait for completion of all irecv's. + for (i = 0; i < size-1; i++) { + int index = MPI_UNDEFINED; + smpi_mpi_waitany( size-1, requests, &index, MPI_STATUS_IGNORE); +#ifdef DEBUG_REDUCE + printf ("MPI_Waitany() unblocked: root received (completes req[index=%d])\n",index); + print_buffer_int(tmpbufs[index], count, bprintf("tmpbufs[index=%d] (value received)", index), + rank); +#endif + + // arg 2 is modified + op->func(tmpbufs[index], recvbuf, &count, &datatype); +#ifdef DEBUG_REDUCE + print_buffer_int(recvbuf, count, xbt_strdup("rcvbuf"), rank); +#endif + xbt_free(tmpbufs[index]); + /* FIXME: with the following line, it generates an + * [xbt_ex/CRITICAL] Conditional list not empty 162518800. + */ + // xbt_mallocator_release(smpi_global->request_mallocator, requests[index]); + } + xbt_free(requests); + xbt_free(tmpbufs); + } + return retval; +} + +/** + * MPI_Reduce user entry point + **/ +int SMPI_MPI_Reduce(void *sendbuf, void *recvbuf, int count, + MPI_Datatype datatype, MPI_Op op, int root, MPI_Comm comm) +{ +int retval = MPI_SUCCESS; + + smpi_bench_end(); + + retval = smpi_mpi_reduce(sendbuf, recvbuf, count, datatype, op, root, comm); + + smpi_bench_begin(); + return retval; +} + + + +/** + * MPI_Allreduce + * + * Same as MPI_REDUCE except that the result appears in the receive buffer of all the group members. + **/ +int SMPI_MPI_Allreduce( void *sendbuf, void *recvbuf, int count, MPI_Datatype datatype, + MPI_Op op, MPI_Comm comm ) +{ +int retval = MPI_SUCCESS; +int root=0; // arbitrary choice + + smpi_bench_end(); + + retval = smpi_mpi_reduce( sendbuf, recvbuf, count, datatype, op, root, comm); + if (MPI_SUCCESS != retval) + return(retval); + + retval = smpi_mpi_bcast( sendbuf, count, datatype, root, comm); + + smpi_bench_end(); + return( retval ); +} + + +/** + * MPI_Scatter user entry point + **/ +int SMPI_MPI_Scatter(void *sendbuf, int sendcount, MPI_Datatype datatype, + void *recvbuf, int recvcount, MPI_Datatype recvtype, + int root, MPI_Comm comm) +{ + int retval = MPI_SUCCESS; + int i; + int cnt=0; + int rank; + int tag=0; + char *cptr; // to manipulate the void * buffers + smpi_mpi_request_t *requests; + smpi_mpi_request_t request; + smpi_mpi_status_t status; + + + smpi_bench_end(); + + rank = smpi_mpi_comm_rank(comm); + + requests = xbt_malloc((comm->size-1) * sizeof(smpi_mpi_request_t)); + if (rank == root) { + // i am the root: distribute my sendbuf + //print_buffer_int(sendbuf, comm->size, xbt_strdup("rcvbuf"), rank); + cptr = sendbuf; + for (i=0; i < comm->size; i++) { + if ( i!=root ) { // send to processes ... + + retval = smpi_create_request((void *)cptr, sendcount, + datatype, root, i, tag, comm, &(requests[cnt])); + if (NULL != requests[cnt] && MPI_SUCCESS == retval) { + if (MPI_SUCCESS == retval) { + smpi_mpi_isend(requests[cnt]); + } + } + cnt++; + } + else { // ... except if it's me. + memcpy(recvbuf, (void *)cptr, recvcount*recvtype->size*sizeof(char)); } - for (j = 0; j < keycount; j++) { - if (rankkeymap[j*2]) { - retval = smpi_create_request(&j, 1, MPI_INT, 0, - rankkeymap[j*2], 0, comm, &request); - request->data = tempcomm; - smpi_mpi_isend(request); - smpi_mpi_wait(request, &status); - xbt_mallocator_release(smpi_global->request_mallocator, request); - } else { - *comm_out = tempcomm; - } + cptr += sendcount*datatype->size; + } + for(i=0; irequest_mallocator, requests[i]); + + } + } + else { // i am a non-root process: wait data from the root + retval = smpi_create_request(recvbuf,recvcount, + recvtype, root, rank, tag, comm, &request); + if (NULL != request && MPI_SUCCESS == retval) { + if (MPI_SUCCESS == retval) { + smpi_mpi_irecv(request); } - } - } else { - colorkey[0] = color; - colorkey[1] = key; - retval = smpi_create_request(colorkey, 2, MPI_INT, rank, 0, 0, comm, &request); - smpi_mpi_isend(request); - smpi_mpi_wait(request, &status); - xbt_mallocator_release(smpi_global->request_mallocator, request); - retval = smpi_create_request(colorkey, 1, MPI_INT, 0, rank, 0, comm, &request); - smpi_mpi_irecv(request); - smpi_mpi_wait(request, &status); - *comm_out = request->data; - } - - smpi_bench_begin(); - - return retval; + } + smpi_mpi_wait(request, &status); + xbt_mallocator_release(smpi_global->request_mallocator, request); + } + xbt_free(requests); + + smpi_bench_begin(); + + return retval; } + + +/** + * MPI_Alltoall user entry point + * + * Uses the logic of OpenMPI (upto 1.2.7 or greater) for the optimizations + * ompi/mca/coll/tuned/coll_tuned_module.c + **/ +int SMPI_MPI_Alltoall(void *sendbuf, int sendcount, MPI_Datatype datatype, + void *recvbuf, int recvcount, MPI_Datatype recvtype, + MPI_Comm comm) +{ + int retval = MPI_SUCCESS; + int block_dsize; + int rank; + + smpi_bench_end(); + + rank = smpi_mpi_comm_rank(comm); + block_dsize = datatype->size * sendcount; + + if ((block_dsize < 200) && (comm->size > 12)) { + retval = smpi_coll_tuned_alltoall_bruck(sendbuf, sendcount, datatype, + recvbuf, recvcount, recvtype, comm); + + } else if (block_dsize < 3000) { +/* use this one !! retval = smpi_coll_tuned_alltoall_basic_linear(sendbuf, sendcount, datatype, + recvbuf, recvcount, recvtype, comm); + */ + retval = smpi_coll_tuned_alltoall_pairwise(sendbuf, sendcount, datatype, + recvbuf, recvcount, recvtype, comm); + } else { + + retval = smpi_coll_tuned_alltoall_pairwise(sendbuf, sendcount, datatype, + recvbuf, recvcount, recvtype, comm); + } + + smpi_bench_begin(); + + return retval; +} + + + + +// used by comm_split to sort ranks based on key values +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; + + if (x[1] < y[1]) + return -1; + + if (x[1] == y[1]) { + if (x[0] < y[0]) + return -1; + if (x[0] == y[0]) + return 0; + return 1; + } + + return 1; +} + +int SMPI_MPI_Comm_split(MPI_Comm comm, int color, int key, + MPI_Comm * comm_out) +{ + int retval = MPI_SUCCESS; + + int index, rank; + smpi_mpi_request_t request; + int colorkey[2]; + smpi_mpi_status_t status; + + smpi_bench_end(); + + // FIXME: need to test parameters + + index = smpi_process_index(); + rank = comm->index_to_rank_map[index]; + + // default output + comm_out = NULL; + + // root node does most of the real work + if (0 == rank) { + int colormap[comm->size]; + int keymap[comm->size]; + int rankkeymap[comm->size * 2]; + int i, j; + smpi_mpi_communicator_t tempcomm = NULL; + int count; + int indextmp; + + colormap[0] = color; + keymap[0] = key; + + // FIXME: use scatter/gather or similar instead of individual comms + for (i = 1; i < comm->size; i++) { + retval = smpi_create_request(colorkey, 2, MPI_INT, MPI_ANY_SOURCE, + rank, MPI_ANY_TAG, comm, &request); + smpi_mpi_irecv(request); + smpi_mpi_wait(request, &status); + colormap[status.MPI_SOURCE] = colorkey[0]; + keymap[status.MPI_SOURCE] = colorkey[1]; + xbt_mallocator_release(smpi_global->request_mallocator, request); + } + + for (i = 0; i < comm->size; i++) { + if (MPI_UNDEFINED == colormap[i]) { + continue; + } + // make a list of nodes with current color and sort by keys + count = 0; + for (j = i; j < comm->size; j++) { + if (colormap[i] == colormap[j]) { + colormap[j] = MPI_UNDEFINED; + rankkeymap[count * 2] = j; + rankkeymap[count * 2 + 1] = keymap[j]; + count++; + } + } + qsort(rankkeymap, count, sizeof(int) * 2, &smpi_compare_rankkeys); + + // new communicator + tempcomm = xbt_new(s_smpi_mpi_communicator_t, 1); + tempcomm->barrier_count = 0; + tempcomm->size = count; + tempcomm->barrier_mutex = SIMIX_mutex_init(); + tempcomm->barrier_cond = SIMIX_cond_init(); + tempcomm->rank_to_index_map = xbt_new(int, count); + tempcomm->index_to_rank_map = xbt_new(int, smpi_global->process_count); + for (j = 0; j < smpi_global->process_count; j++) { + tempcomm->index_to_rank_map[j] = -1; + } + for (j = 0; j < count; j++) { + indextmp = comm->rank_to_index_map[rankkeymap[j * 2]]; + tempcomm->rank_to_index_map[j] = indextmp; + tempcomm->index_to_rank_map[indextmp] = j; + } + for (j = 0; j < count; j++) { + if (rankkeymap[j * 2]) { + retval = smpi_create_request(&j, 1, MPI_INT, 0, + rankkeymap[j * 2], 0, comm, &request); + request->data = tempcomm; + smpi_mpi_isend(request); + smpi_mpi_wait(request, &status); + xbt_mallocator_release(smpi_global->request_mallocator, request); + } else { + *comm_out = tempcomm; + } + } + } + } else { + colorkey[0] = color; + colorkey[1] = key; + retval = smpi_create_request(colorkey, 2, MPI_INT, rank, 0, 0, comm, + &request); + smpi_mpi_isend(request); + smpi_mpi_wait(request, &status); + xbt_mallocator_release(smpi_global->request_mallocator, request); + if (MPI_UNDEFINED != color) { + retval = smpi_create_request(colorkey, 1, MPI_INT, 0, rank, 0, comm, + &request); + smpi_mpi_irecv(request); + smpi_mpi_wait(request, &status); + *comm_out = request->data; + } + } + + smpi_bench_begin(); + + return retval; +} + +double SMPI_MPI_Wtime(void) +{ + return (SIMIX_get_clock()); +} + +