src/smpi/smpi_base.c

   1 #include "private.h"
   2
   3 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_base, smpi,
   4                                 "Logging specific to SMPI (base)");
   5 XBT_LOG_EXTERNAL_CATEGORY(smpi_base);
   6 XBT_LOG_EXTERNAL_CATEGORY(smpi_bench);
   7 XBT_LOG_EXTERNAL_CATEGORY(smpi_kernel);
   8 XBT_LOG_EXTERNAL_CATEGORY(smpi_mpi);
   9 XBT_LOG_EXTERNAL_CATEGORY(smpi_receiver);
  10 XBT_LOG_EXTERNAL_CATEGORY(smpi_sender);
  11 XBT_LOG_EXTERNAL_CATEGORY(smpi_util);
  12
  13 smpi_mpi_global_t smpi_mpi_global = NULL;
  14
  15 void smpi_mpi_land_func(void *a, void *b, int *length,
  16                         MPI_Datatype * datatype);
  17
  18 void smpi_mpi_land_func(void *a, void *b, int *length,
  19                         MPI_Datatype * datatype)
  20 {
  21   int i;
  22   if (*datatype == smpi_mpi_global->mpi_int) {
  23     int *x = a, *y = b;
  24     for (i = 0; i < *length; i++) {
  25       y[i] = x[i] && y[i];
  26     }
  27   }
  28 }
  29
  30 void smpi_mpi_sum_func(void *a, void *b, int *length,
  31                        MPI_Datatype * datatype);
  32
  33 void smpi_mpi_sum_func(void *a, void *b, int *length, MPI_Datatype * datatype)
  34 {
  35   int i;
  36   if (*datatype == smpi_mpi_global->mpi_int) {
  37     int *x = a, *y = b;
  38     for (i = 0; i < *length; i++) {
  39       y[i] = x[i] + y[i];
  40     }
  41   }
  42 }
  43
  44 int smpi_mpi_comm_rank(smpi_mpi_communicator_t comm)
  45 {
  46   return comm->index_to_rank_map[smpi_host_index()];
  47 }
  48
  49 void smpi_init_process()
  50 {
  51   smx_host_t host;
  52   int i;
  53   smpi_host_data_t hdata;
  54
  55   SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
  56   smpi_global->running_hosts_count++;
  57   SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
  58
  59   // initialize some local variables
  60   host = SIMIX_host_self();
  61
  62   hdata = xbt_new(s_smpi_host_data_t, 1);
  63
  64   for (i = 0; i < smpi_global->host_count && host != smpi_global->hosts[i]; i++);
  65
  66   hdata->index = i;
  67   hdata->mutex = SIMIX_mutex_init();
  68   hdata->cond = SIMIX_cond_init();
  69
  70   SIMIX_host_set_data(host, hdata);
  71
  72   // node 0 sets the globals
  73   if (0 == i) {
  74
  75
  76     // signal all nodes to perform initialization
  77     SIMIX_mutex_lock(smpi_global->start_stop_mutex);
  78     smpi_global->root_ready = 1;
  79     SIMIX_cond_broadcast(smpi_global->start_stop_cond);
  80     SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
  81
  82   } else {
  83
  84     // make sure root is done before own initialization
  85     SIMIX_mutex_lock(smpi_global->start_stop_mutex);
  86     while (!smpi_global->root_ready) {
  87       SIMIX_cond_wait(smpi_global->start_stop_cond,
  88                       smpi_global->start_stop_mutex);
  89     }
  90     SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
  91
  92   }
  93
  94   // wait for all nodes to signal initializatin complete
  95   SIMIX_mutex_lock(smpi_global->start_stop_mutex);
  96   smpi_global->ready_process_count++;
  97   if (smpi_global->ready_process_count >= 3 * smpi_global->host_count) {
  98     SIMIX_cond_broadcast(smpi_global->start_stop_cond);
  99   }
 100   while (smpi_global->ready_process_count < 3 * smpi_global->host_count) {
 101     SIMIX_cond_wait(smpi_global->start_stop_cond,
 102                     smpi_global->start_stop_mutex);
 103   }
 104   SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 105
 106   return;
 107 }
 108
 109 void smpi_mpi_finalize()
 110 {
 111   int i;
 112
 113   SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
 114   i = --smpi_global->running_hosts_count;
 115   SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
 116
 117   SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 118   smpi_global->ready_process_count--;
 119   SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 120
 121   SIMIX_mutex_destroy(smpi_host_mutex());
 122   SIMIX_cond_destroy(smpi_host_cond());
 123
 124   if (0 >= i) {
 125
 126     // wake up senders/receivers
 127     for (i = 0; i < smpi_global->host_count; i++) {
 128       if (SIMIX_process_is_suspended(smpi_global->sender_processes[i])) {
 129         SIMIX_process_resume(smpi_global->sender_processes[i]);
 130       }
 131       if (SIMIX_process_is_suspended(smpi_global->receiver_processes[i])) {
 132         SIMIX_process_resume(smpi_global->receiver_processes[i]);
 133       }
 134     }
 135
 136     SIMIX_mutex_destroy(smpi_mpi_global->mpi_comm_world->barrier_mutex);
 137     SIMIX_cond_destroy(smpi_mpi_global->mpi_comm_world->barrier_cond);
 138     xbt_free(smpi_mpi_global->mpi_comm_world);
 139
 140     xbt_free(smpi_mpi_global->mpi_byte);
 141     xbt_free(smpi_mpi_global->mpi_int);
 142     xbt_free(smpi_mpi_global->mpi_double);
 143
 144     xbt_free(smpi_mpi_global->mpi_land);
 145     xbt_free(smpi_mpi_global->mpi_sum);
 146
 147     xbt_free(smpi_mpi_global);
 148
 149   }
 150
 151 }
 152
 153 int smpi_mpi_barrier(smpi_mpi_communicator_t comm)
 154 {
 155
 156   SIMIX_mutex_lock(comm->barrier_mutex);
 157   ++comm->barrier_count;
 158   if (comm->barrier_count > comm->size) {       // only happens on second barrier...
 159     comm->barrier_count = 0;
 160   } else if (comm->barrier_count == comm->size) {
 161     SIMIX_cond_broadcast(comm->barrier_cond);
 162   }
 163   while (comm->barrier_count < comm->size) {
 164     SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
 165   }
 166   SIMIX_mutex_unlock(comm->barrier_mutex);
 167
 168   return MPI_SUCCESS;
 169 }
 170
 171 int smpi_mpi_isend(smpi_mpi_request_t request)
 172 {
 173   int retval = MPI_SUCCESS;
 174   int index = smpi_host_index();
 175
 176   if (NULL == request) {
 177     retval = MPI_ERR_INTERN;
 178   } else {
 179     SIMIX_mutex_lock(smpi_global->pending_send_request_queues_mutexes[index]);
 180     xbt_fifo_push(smpi_global->pending_send_request_queues[index], request);
 181     SIMIX_mutex_unlock(smpi_global->pending_send_request_queues_mutexes
 182                        [index]);
 183
 184     if (SIMIX_process_is_suspended(smpi_global->sender_processes[index])) {
 185       SIMIX_process_resume(smpi_global->sender_processes[index]);
 186     }
 187   }
 188
 189   return retval;
 190 }
 191
 192 int smpi_mpi_irecv(smpi_mpi_request_t request)
 193 {
 194   int retval = MPI_SUCCESS;
 195   int index = smpi_host_index();
 196
 197   if (NULL == request) {
 198     retval = MPI_ERR_INTERN;
 199   } else {
 200     SIMIX_mutex_lock(smpi_global->pending_recv_request_queues_mutexes[index]);
 201     xbt_fifo_push(smpi_global->pending_recv_request_queues[index], request);
 202     SIMIX_mutex_unlock(smpi_global->pending_recv_request_queues_mutexes
 203                        [index]);
 204
 205     if (SIMIX_process_is_suspended(smpi_global->receiver_processes[index])) {
 206       SIMIX_process_resume(smpi_global->receiver_processes[index]);
 207     }
 208   }
 209
 210   return retval;
 211 }
 212
 213 int smpi_mpi_wait(smpi_mpi_request_t request, smpi_mpi_status_t * status)
 214 {
 215   int retval = MPI_SUCCESS;
 216
 217   if (NULL == request) {
 218     retval = MPI_ERR_INTERN;
 219   } else {
 220     SIMIX_mutex_lock(request->mutex);
 221     while (!request->completed) {
 222       SIMIX_cond_wait(request->cond, request->mutex);
 223     }
 224     if (NULL != status) {
 225       status->MPI_SOURCE = request->src;
 226       status->MPI_TAG = request->tag;
 227       status->MPI_ERROR = MPI_SUCCESS;
 228     }
 229     SIMIX_mutex_unlock(request->mutex);
 230   }
 231
 232   return retval;
 233 }