src/smpi/smpi_base.c

   1 #include "private.h"
   2 #include "xbt/time.h"
   3
   4 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_base, smpi,
   5                                 "Logging specific to SMPI (base)");
   6 XBT_LOG_EXTERNAL_CATEGORY(smpi_base);
   7 XBT_LOG_EXTERNAL_CATEGORY(smpi_bench);
   8 XBT_LOG_EXTERNAL_CATEGORY(smpi_kernel);
   9 XBT_LOG_EXTERNAL_CATEGORY(smpi_mpi);
  10 XBT_LOG_EXTERNAL_CATEGORY(smpi_receiver);
  11 XBT_LOG_EXTERNAL_CATEGORY(smpi_sender);
  12 XBT_LOG_EXTERNAL_CATEGORY(smpi_util);
  13
  14 smpi_mpi_global_t smpi_mpi_global = NULL;
  15
  16 void smpi_mpi_land_func(void *a, void *b, int *length,
  17                         MPI_Datatype * datatype);
  18
  19 void smpi_mpi_land_func(void *a, void *b, int *length,
  20                         MPI_Datatype * datatype)
  21 {
  22   int i;
  23   if (*datatype == smpi_mpi_global->mpi_int) {
  24     int *x = a, *y = b;
  25     for (i = 0; i < *length; i++) {
  26       y[i] = x[i] && y[i];
  27     }
  28   }
  29 }
  30
  31 void smpi_mpi_sum_func(void *a, void *b, int *length,
  32                        MPI_Datatype * datatype);
  33
  34 void smpi_mpi_sum_func(void *a, void *b, int *length, MPI_Datatype * datatype)
  35 {
  36   int i;
  37   if (*datatype == smpi_mpi_global->mpi_int) {
  38     int *x = a, *y = b;
  39     for (i = 0; i < *length; i++) {
  40       y[i] = x[i] + y[i];
  41     }
  42   }
  43 }
  44
  45 int smpi_mpi_comm_rank(smpi_mpi_communicator_t comm)
  46 {
  47   return comm->index_to_rank_map[smpi_host_index()];
  48 }
  49
  50 void smpi_process_init()
  51 {
  52   smx_host_t host;
  53   int i;
  54   smpi_host_data_t hdata;
  55
  56   smpi_global->running_hosts_count++;
  57
  58   // initialize some local variables
  59   host = SIMIX_host_self();
  60
  61   hdata = xbt_new(s_smpi_host_data_t, 1);
  62   SIMIX_host_set_data(host, hdata);
  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   hdata->pending_recv_request_queue = xbt_fifo_new();
  71
  72   hdata->main = SIMIX_process_self();
  73   hdata->sender = SIMIX_process_create("smpi_sender",
  74           smpi_sender, hdata,
  75           SIMIX_host_get_name(SIMIX_host_self()), 0, NULL,
  76           /*props */ NULL);
  77   hdata->receiver = SIMIX_process_create("smpi_receiver",
  78           smpi_receiver, hdata,
  79           SIMIX_host_get_name(SIMIX_host_self()), 0, NULL,
  80           /*props */ NULL);
  81   return;
  82 }
  83
  84 void smpi_process_finalize()
  85 {
  86   int i;
  87   smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
  88
  89   i = --smpi_global->running_hosts_count;
  90
  91   SIMIX_mutex_destroy(smpi_host_mutex());
  92   SIMIX_cond_destroy(smpi_host_cond());
  93   xbt_fifo_free(hdata->pending_recv_request_queue);
  94
  95   if (0 >= i) {
  96
  97     // wake up senders/receivers
  98     for (i = 0; i < smpi_global->host_count; i++) {
  99       if (SIMIX_process_is_suspended(smpi_global->sender_processes[i])) {
 100         SIMIX_process_resume(smpi_global->sender_processes[i]);
 101       }
 102       if (SIMIX_process_is_suspended(smpi_global->receiver_processes[i])) {
 103         SIMIX_process_resume(smpi_global->receiver_processes[i]);
 104       }
 105     }
 106
 107     SIMIX_mutex_destroy(smpi_mpi_global->mpi_comm_world->barrier_mutex);
 108     SIMIX_cond_destroy(smpi_mpi_global->mpi_comm_world->barrier_cond);
 109     xbt_free(smpi_mpi_global->mpi_comm_world);
 110
 111     xbt_free(smpi_mpi_global->mpi_byte);
 112     xbt_free(smpi_mpi_global->mpi_int);
 113     xbt_free(smpi_mpi_global->mpi_double);
 114
 115     xbt_free(smpi_mpi_global->mpi_land);
 116     xbt_free(smpi_mpi_global->mpi_sum);
 117
 118     xbt_free(smpi_mpi_global);
 119
 120   }
 121
 122 }
 123
 124 int smpi_mpi_barrier(smpi_mpi_communicator_t comm)
 125 {
 126
 127   SIMIX_mutex_lock(comm->barrier_mutex);
 128   ++comm->barrier_count;
 129   if (comm->barrier_count > comm->size) {       // only happens on second barrier...
 130     comm->barrier_count = 0;
 131   } else if (comm->barrier_count == comm->size) {
 132     SIMIX_cond_broadcast(comm->barrier_cond);
 133   }
 134   while (comm->barrier_count < comm->size) {
 135     SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
 136   }
 137   SIMIX_mutex_unlock(comm->barrier_mutex);
 138
 139   return MPI_SUCCESS;
 140 }
 141
 142 int smpi_mpi_isend(smpi_mpi_request_t request)
 143 {
 144   int retval = MPI_SUCCESS;
 145   int index = smpi_host_index();
 146
 147   if (NULL == request) {
 148     retval = MPI_ERR_INTERN;
 149   } else {
 150     xbt_fifo_push(smpi_global->pending_send_request_queues[index], request);
 151
 152     if (SIMIX_process_is_suspended(smpi_global->sender_processes[index])) {
 153       SIMIX_process_resume(smpi_global->sender_processes[index]);
 154     }
 155   }
 156
 157   return retval;
 158 }
 159
 160 int smpi_mpi_irecv(smpi_mpi_request_t request)
 161 {
 162   int retval = MPI_SUCCESS;
 163   smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
 164
 165   if (NULL == request) {
 166     retval = MPI_ERR_INTERN;
 167   } else {
 168     xbt_fifo_push(hdata->pending_recv_request_queue, request);
 169
 170     if (SIMIX_process_is_suspended(smpi_global->receiver_processes[hdata->index])) {
 171       SIMIX_process_resume(smpi_global->receiver_processes[hdata->index]);
 172     }
 173   }
 174
 175   return retval;
 176 }
 177
 178 int smpi_mpi_wait(smpi_mpi_request_t request, smpi_mpi_status_t * status)
 179 {
 180   int retval = MPI_SUCCESS;
 181
 182   if (NULL == request) {
 183     retval = MPI_ERR_INTERN;
 184   } else {
 185     SIMIX_mutex_lock(request->mutex);
 186     while (!request->completed) {
 187       SIMIX_cond_wait(request->cond, request->mutex);
 188     }
 189     if (NULL != status) {
 190       status->MPI_SOURCE = request->src;
 191       status->MPI_TAG = request->tag;
 192       status->MPI_ERROR = MPI_SUCCESS;
 193     }
 194     SIMIX_mutex_unlock(request->mutex);
 195   }
 196
 197   return retval;
 198 }