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   // initialize some local variables
  57   host = SIMIX_host_self();
  58
  59   hdata = xbt_new(s_smpi_host_data_t, 1);
  60   SIMIX_host_set_data(host, hdata);
  61   SIMIX_process_set_data(SIMIX_process_self(),hdata);
  62
  63   for (i = 0; i < smpi_global->host_count && host != smpi_global->hosts[i]; i++);
  64
  65   hdata->index = i;
  66   hdata->mutex = SIMIX_mutex_init();
  67   hdata->cond = SIMIX_cond_init();
  68   hdata->finalize = 0;
  69
  70   hdata->pending_recv_request_queue = xbt_fifo_new();
  71   hdata->pending_send_request_queue = xbt_fifo_new();
  72
  73   hdata->main = SIMIX_process_self();
  74   hdata->sender = SIMIX_process_create("smpi_sender",
  75           smpi_sender, hdata,
  76           SIMIX_host_get_name(SIMIX_host_self()), 0, NULL,
  77           /*props */ NULL);
  78   hdata->receiver = SIMIX_process_create("smpi_receiver",
  79           smpi_receiver, hdata,
  80           SIMIX_host_get_name(SIMIX_host_self()), 0, NULL,
  81           /*props */ NULL);
  82
  83   smpi_global->main_processes[hdata->index] = SIMIX_process_self();
  84   return;
  85 }
  86
  87 void smpi_process_finalize()
  88 {
  89   smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
  90
  91   hdata->finalize = 2; /* Tell sender and receiver to quit */
  92   SIMIX_process_resume(hdata->sender);
  93   SIMIX_process_resume(hdata->receiver);
  94   while (hdata->finalize>0) { /* wait until it's done */
  95           SIMIX_cond_wait(hdata->cond,hdata->mutex);
  96   }
  97
  98   SIMIX_mutex_destroy(hdata->mutex);
  99   SIMIX_cond_destroy(hdata->cond);
 100   xbt_fifo_free(hdata->pending_recv_request_queue);
 101   xbt_fifo_free(hdata->pending_send_request_queue);
 102 }
 103
 104 int smpi_mpi_barrier(smpi_mpi_communicator_t comm)
 105 {
 106
 107   SIMIX_mutex_lock(comm->barrier_mutex);
 108   ++comm->barrier_count;
 109   if (comm->barrier_count > comm->size) {       // only happens on second barrier...
 110     comm->barrier_count = 0;
 111   } else if (comm->barrier_count == comm->size) {
 112     SIMIX_cond_broadcast(comm->barrier_cond);
 113   }
 114   while (comm->barrier_count < comm->size) {
 115     SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
 116   }
 117   SIMIX_mutex_unlock(comm->barrier_mutex);
 118
 119   return MPI_SUCCESS;
 120 }
 121
 122 int smpi_mpi_isend(smpi_mpi_request_t request)
 123 {
 124         smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
 125   int retval = MPI_SUCCESS;
 126
 127   if (NULL == request) {
 128     retval = MPI_ERR_INTERN;
 129   } else {
 130     xbt_fifo_push(hdata->pending_send_request_queue, request);
 131     SIMIX_process_resume(hdata->sender);
 132   }
 133
 134   return retval;
 135 }
 136
 137 int smpi_mpi_irecv(smpi_mpi_request_t request)
 138 {
 139   int retval = MPI_SUCCESS;
 140   smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
 141
 142   if (NULL == request) {
 143     retval = MPI_ERR_INTERN;
 144   } else {
 145     xbt_fifo_push(hdata->pending_recv_request_queue, request);
 146
 147     if (SIMIX_process_is_suspended(hdata->receiver)) {
 148       SIMIX_process_resume(hdata->receiver);
 149     }
 150   }
 151
 152   return retval;
 153 }
 154
 155 int smpi_mpi_wait(smpi_mpi_request_t request, smpi_mpi_status_t * status)
 156 {
 157   int retval = MPI_SUCCESS;
 158
 159   if (NULL == request) {
 160     retval = MPI_ERR_INTERN;
 161   } else {
 162     SIMIX_mutex_lock(request->mutex);
 163     while (!request->completed) {
 164       SIMIX_cond_wait(request->cond, request->mutex);
 165     }
 166     if (NULL != status) {
 167       status->MPI_SOURCE = request->src;
 168       status->MPI_TAG = request->tag;
 169       status->MPI_ERROR = MPI_SUCCESS;
 170     }
 171     SIMIX_mutex_unlock(request->mutex);
 172   }
 173
 174   return retval;
 175 }