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
  82   smpi_global->main_processes[hdata->index] = SIMIX_process_self();
  83   return;
  84 }
  85
  86 void smpi_process_finalize()
  87 {
  88   int i;
  89   smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
  90
  91   i = --smpi_global->running_hosts_count;
  92
  93   SIMIX_mutex_destroy(smpi_host_mutex());
  94   SIMIX_cond_destroy(smpi_host_cond());
  95   xbt_fifo_free(hdata->pending_recv_request_queue);
  96
  97   if (0 >= i) {
  98
  99     // wake up senders/receivers
 100     for (i = 0; i < smpi_global->host_count; i++) {
 101       if (SIMIX_process_is_suspended(smpi_global->sender_processes[i])) {
 102         SIMIX_process_resume(smpi_global->sender_processes[i]);
 103       }
 104       if (SIMIX_process_is_suspended(smpi_global->receiver_processes[i])) {
 105         SIMIX_process_resume(smpi_global->receiver_processes[i]);
 106       }
 107     }
 108
 109     SIMIX_mutex_destroy(smpi_mpi_global->mpi_comm_world->barrier_mutex);
 110     SIMIX_cond_destroy(smpi_mpi_global->mpi_comm_world->barrier_cond);
 111     xbt_free(smpi_mpi_global->mpi_comm_world);
 112
 113     xbt_free(smpi_mpi_global->mpi_byte);
 114     xbt_free(smpi_mpi_global->mpi_int);
 115     xbt_free(smpi_mpi_global->mpi_double);
 116
 117     xbt_free(smpi_mpi_global->mpi_land);
 118     xbt_free(smpi_mpi_global->mpi_sum);
 119
 120     xbt_free(smpi_mpi_global);
 121
 122   }
 123
 124 }
 125
 126 int smpi_mpi_barrier(smpi_mpi_communicator_t comm)
 127 {
 128
 129   SIMIX_mutex_lock(comm->barrier_mutex);
 130   ++comm->barrier_count;
 131   if (comm->barrier_count > comm->size) {       // only happens on second barrier...
 132     comm->barrier_count = 0;
 133   } else if (comm->barrier_count == comm->size) {
 134     SIMIX_cond_broadcast(comm->barrier_cond);
 135   }
 136   while (comm->barrier_count < comm->size) {
 137     SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
 138   }
 139   SIMIX_mutex_unlock(comm->barrier_mutex);
 140
 141   return MPI_SUCCESS;
 142 }
 143
 144 int smpi_mpi_isend(smpi_mpi_request_t request)
 145 {
 146   int retval = MPI_SUCCESS;
 147   int index = smpi_host_index();
 148
 149   if (NULL == request) {
 150     retval = MPI_ERR_INTERN;
 151   } else {
 152     xbt_fifo_push(smpi_global->pending_send_request_queues[index], request);
 153
 154     if (SIMIX_process_is_suspended(smpi_global->sender_processes[index])) {
 155       SIMIX_process_resume(smpi_global->sender_processes[index]);
 156     }
 157   }
 158
 159   return retval;
 160 }
 161
 162 int smpi_mpi_irecv(smpi_mpi_request_t request)
 163 {
 164   int retval = MPI_SUCCESS;
 165   smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
 166
 167   if (NULL == request) {
 168     retval = MPI_ERR_INTERN;
 169   } else {
 170     xbt_fifo_push(hdata->pending_recv_request_queue, request);
 171
 172     if (SIMIX_process_is_suspended(smpi_global->receiver_processes[hdata->index])) {
 173       SIMIX_process_resume(smpi_global->receiver_processes[hdata->index]);
 174     }
 175   }
 176
 177   return retval;
 178 }
 179
 180 int smpi_mpi_wait(smpi_mpi_request_t request, smpi_mpi_status_t * status)
 181 {
 182   int retval = MPI_SUCCESS;
 183
 184   if (NULL == request) {
 185     retval = MPI_ERR_INTERN;
 186   } else {
 187     SIMIX_mutex_lock(request->mutex);
 188     while (!request->completed) {
 189       SIMIX_cond_wait(request->cond, request->mutex);
 190     }
 191     if (NULL != status) {
 192       status->MPI_SOURCE = request->src;
 193       status->MPI_TAG = request->tag;
 194       status->MPI_ERROR = MPI_SUCCESS;
 195     }
 196     SIMIX_mutex_unlock(request->mutex);
 197   }
 198
 199   return retval;
 200 }