src/smpi/smpi_base.c

   1 #include "private.h"
   2
   3 SMPI_MPI_Global_t smpi_mpi_global = NULL;
   4
   5 void smpi_mpi_land_func(void *x, void *y, void *z)
   6 {
   7         *(int *)z = *(int *)x && *(int *)y;
   8 }
   9
  10 void smpi_mpi_sum_func(void *x, void *y, void *z)
  11 {
  12         *(int *)z = *(int *)x + *(int *)y;
  13 }
  14
  15 int inline smpi_mpi_comm_size(smpi_mpi_communicator_t comm)
  16 {
  17         return comm->size;
  18 }
  19
  20 // FIXME: smarter algorithm?
  21 int smpi_mpi_comm_rank(smpi_mpi_communicator_t comm, smx_host_t host)
  22 {
  23         int i;
  24
  25         for(i = comm->size - 1; i > 0 && host != comm->hosts[i]; i--);
  26
  27         return i;
  28 }
  29
  30 int inline smpi_mpi_comm_rank_self(smpi_mpi_communicator_t comm)
  31 {
  32         return smpi_mpi_comm_rank(comm, SIMIX_host_self());
  33 }
  34
  35 void smpi_mpi_init()
  36 {
  37         smx_process_t process;
  38         smx_host_t host;
  39         smx_host_t *hosts;
  40         int size;
  41
  42         SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
  43         smpi_global->running_hosts_count++;
  44         SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
  45
  46         // initialize some local variables
  47         process = SIMIX_process_self();
  48         host    = SIMIX_host_self();
  49         hosts   = SIMIX_host_get_table();
  50         size    = SIMIX_host_get_number();
  51
  52         // node 0 sets the globals
  53         if (host == hosts[0]) {
  54
  55                 smpi_mpi_global                                = xbt_new(s_SMPI_MPI_Global_t, 1);
  56
  57                 // global communicator
  58                 smpi_mpi_global->mpi_comm_world                = xbt_new(s_smpi_mpi_communicator_t, 1);
  59                 smpi_mpi_global->mpi_comm_world->size          = size;
  60                 smpi_mpi_global->mpi_comm_world->hosts         = hosts;
  61                 smpi_mpi_global->mpi_comm_world->processes     = xbt_new(smx_process_t, size);
  62                 smpi_mpi_global->mpi_comm_world->processes[0]  = process;
  63                 smpi_mpi_global->mpi_comm_world->barrier_count = 0;
  64                 smpi_mpi_global->mpi_comm_world->barrier_mutex = SIMIX_mutex_init();
  65                 smpi_mpi_global->mpi_comm_world->barrier_cond  = SIMIX_cond_init();
  66
  67                 // mpi datatypes
  68                 smpi_mpi_global->mpi_byte                      = xbt_new(s_smpi_mpi_datatype_t, 1);
  69                 smpi_mpi_global->mpi_byte->size                = (size_t)1;
  70                 smpi_mpi_global->mpi_int                       = xbt_new(s_smpi_mpi_datatype_t, 1);
  71                 smpi_mpi_global->mpi_int->size                 = sizeof(int);
  72                 smpi_mpi_global->mpi_double                    = xbt_new(s_smpi_mpi_datatype_t, 1);
  73                 smpi_mpi_global->mpi_double->size              = sizeof(double);
  74
  75                 // mpi operations
  76                 smpi_mpi_global->mpi_land                      = xbt_new(s_smpi_mpi_op_t, 1);
  77                 smpi_mpi_global->mpi_land->func                = smpi_mpi_land_func;
  78                 smpi_mpi_global->mpi_sum                       = xbt_new(s_smpi_mpi_op_t, 1);
  79                 smpi_mpi_global->mpi_sum->func                 = smpi_mpi_sum_func;
  80
  81                 // signal all nodes to perform initialization
  82                 SIMIX_mutex_lock(smpi_global->start_stop_mutex);
  83                 smpi_global->root_ready = 1;
  84                 SIMIX_cond_broadcast(smpi_global->start_stop_cond);
  85                 SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
  86
  87         } else {
  88
  89                 // make sure root is done before own initialization
  90                 SIMIX_mutex_lock(smpi_global->start_stop_mutex);
  91                 if (!smpi_global->root_ready) {
  92                         SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
  93                 }
  94                 SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
  95
  96                 smpi_mpi_global->mpi_comm_world->processes[smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world)] = process;
  97         }
  98
  99         // wait for all nodes to signal initializatin complete
 100         SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 101         smpi_global->ready_process_count++;
 102         if (smpi_global->ready_process_count < 3 * size) {
 103                 SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
 104         } else {
 105                 SIMIX_cond_broadcast(smpi_global->start_stop_cond);
 106         }
 107         SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 108
 109         return;
 110 }
 111
 112 void smpi_mpi_finalize()
 113 {
 114         int i;
 115         int rank = smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world);
 116
 117         SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
 118         i = --smpi_global->running_hosts_count;
 119         SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
 120
 121         SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 122         smpi_global->ready_process_count--;
 123         SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 124
 125         if (0 >= i) {
 126
 127                 // wake up senders/receivers
 128                 for (i = 0; i < smpi_mpi_global->mpi_comm_world->size; i++) {
 129                         if (SIMIX_process_is_suspended(smpi_global->sender_processes[i])) {
 130                                 SIMIX_process_resume(smpi_global->sender_processes[i]);
 131                         }
 132                         if (SIMIX_process_is_suspended(smpi_global->receiver_processes[i])) {
 133                                 SIMIX_process_resume(smpi_global->receiver_processes[i]);
 134                         }
 135                 }
 136
 137                 SIMIX_mutex_destroy(smpi_mpi_global->mpi_comm_world->barrier_mutex);
 138                 SIMIX_cond_destroy(smpi_mpi_global->mpi_comm_world->barrier_cond);
 139                 xbt_free(smpi_mpi_global->mpi_comm_world->processes);
 140                 xbt_free(smpi_mpi_global->mpi_comm_world);
 141
 142                 xbt_free(smpi_mpi_global->mpi_byte);
 143                 xbt_free(smpi_mpi_global->mpi_int);
 144                 xbt_free(smpi_mpi_global->mpi_double);
 145
 146                 xbt_free(smpi_mpi_global->mpi_land);
 147                 xbt_free(smpi_mpi_global->mpi_sum);
 148
 149                 xbt_free(smpi_mpi_global);
 150
 151         }
 152
 153 }
 154
 155 void smpi_barrier(smpi_mpi_communicator_t comm)
 156 {
 157
 158         SIMIX_mutex_lock(comm->barrier_mutex);
 159         if(++comm->barrier_count < comm->size) {
 160                 SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
 161         } else {
 162                 comm->barrier_count = 0;
 163                 SIMIX_cond_broadcast(comm->barrier_cond);
 164         }
 165         SIMIX_mutex_unlock(comm->barrier_mutex);
 166
 167         return;
 168 }
 169
 170 int smpi_create_request(void *buf, int count, smpi_mpi_datatype_t datatype,
 171         int src, int dst, int tag, smpi_mpi_communicator_t comm, smpi_mpi_request_t *request)
 172 {
 173         int retval = MPI_SUCCESS;
 174
 175         *request = NULL;
 176
 177         if (0 > count) {
 178                 retval = MPI_ERR_COUNT;
 179         } else if (NULL == buf) {
 180                 retval = MPI_ERR_INTERN;
 181         } else if (NULL == datatype) {
 182                 retval = MPI_ERR_TYPE;
 183         } else if (NULL == comm) {
 184                 retval = MPI_ERR_COMM;
 185         } else if (MPI_ANY_SOURCE != src && (0 > src || comm->size <= src)) {
 186                 retval = MPI_ERR_RANK;
 187         } else if (0 > dst || comm->size <= dst) {
 188                 retval = MPI_ERR_RANK;
 189         } else if (0 > tag) {
 190                 retval = MPI_ERR_TAG;
 191         } else {
 192                 *request               = xbt_mallocator_get(smpi_global->request_mallocator);
 193                 (*request)->comm       = comm;
 194                 (*request)->src        = src;
 195                 (*request)->dst        = dst;
 196                 (*request)->tag        = tag;
 197                 (*request)->buf        = buf;
 198                 (*request)->count      = count;
 199                 (*request)->datatype   = datatype;
 200         }
 201         return retval;
 202 }
 203
 204 int smpi_isend(smpi_mpi_request_t request)
 205 {
 206         int retval = MPI_SUCCESS;
 207         int rank   = smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world);
 208
 209         if (NULL != request) {
 210                 SIMIX_mutex_lock(smpi_global->pending_send_request_queues_mutexes[rank]);
 211                 xbt_fifo_push(smpi_global->pending_send_request_queues[rank], request);
 212                 SIMIX_mutex_unlock(smpi_global->pending_send_request_queues_mutexes[rank]);
 213         }
 214
 215         if (SIMIX_process_is_suspended(smpi_global->sender_processes[rank])) {
 216                 SIMIX_process_resume(smpi_global->sender_processes[rank]);
 217         }
 218
 219         return retval;
 220 }
 221
 222 int smpi_irecv(smpi_mpi_request_t request)
 223 {
 224         int retval = MPI_SUCCESS;
 225         int rank = smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world);
 226
 227         if (NULL != request) {
 228                 SIMIX_mutex_lock(smpi_global->pending_recv_request_queues_mutexes[rank]);
 229                 xbt_fifo_push(smpi_global->pending_recv_request_queues[rank], request);
 230                 SIMIX_mutex_unlock(smpi_global->pending_recv_request_queues_mutexes[rank]);
 231         }
 232
 233         if (SIMIX_process_is_suspended(smpi_global->receiver_processes[rank])) {
 234                 SIMIX_process_resume(smpi_global->receiver_processes[rank]);
 235         }
 236
 237         return retval;
 238 }
 239
 240 int smpi_wait(smpi_mpi_request_t request, smpi_mpi_status_t *status)
 241 {
 242         if (NULL != request) {
 243                 SIMIX_mutex_lock(request->mutex);
 244                 if (!request->completed) {
 245                         SIMIX_cond_wait(request->cond, request->mutex);
 246                 }
 247                 if (NULL != status) {
 248                         status->MPI_SOURCE = request->src;
 249                 }
 250                 SIMIX_mutex_unlock(request->mutex);
 251         }
 252
 253         return MPI_SUCCESS;
 254 }