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_process_init()
  50 {
  51   smx_host_t host;
  52   int i;
  53   smpi_host_data_t hdata;
  54
  55   smpi_global->running_hosts_count++;
  56
  57   // initialize some local variables
  58   host = SIMIX_host_self();
  59
  60   hdata = xbt_new(s_smpi_host_data_t, 1);
  61
  62   for (i = 0; i < smpi_global->host_count && host != smpi_global->hosts[i]; i++);
  63
  64   hdata->index = i;
  65   hdata->mutex = SIMIX_mutex_init();
  66   hdata->cond = SIMIX_cond_init();
  67
  68   SIMIX_host_set_data(host, hdata);
  69
  70   return;
  71 }
  72
  73 void smpi_process_finalize()
  74 {
  75   int i;
  76
  77   i = --smpi_global->running_hosts_count;
  78
  79   SIMIX_mutex_destroy(smpi_host_mutex());
  80   SIMIX_cond_destroy(smpi_host_cond());
  81
  82   if (0 >= i) {
  83
  84     // wake up senders/receivers
  85     for (i = 0; i < smpi_global->host_count; i++) {
  86       if (SIMIX_process_is_suspended(smpi_global->sender_processes[i])) {
  87         SIMIX_process_resume(smpi_global->sender_processes[i]);
  88       }
  89       if (SIMIX_process_is_suspended(smpi_global->receiver_processes[i])) {
  90         SIMIX_process_resume(smpi_global->receiver_processes[i]);
  91       }
  92     }
  93
  94     SIMIX_mutex_destroy(smpi_mpi_global->mpi_comm_world->barrier_mutex);
  95     SIMIX_cond_destroy(smpi_mpi_global->mpi_comm_world->barrier_cond);
  96     xbt_free(smpi_mpi_global->mpi_comm_world);
  97
  98     xbt_free(smpi_mpi_global->mpi_byte);
  99     xbt_free(smpi_mpi_global->mpi_int);
 100     xbt_free(smpi_mpi_global->mpi_double);
 101
 102     xbt_free(smpi_mpi_global->mpi_land);
 103     xbt_free(smpi_mpi_global->mpi_sum);
 104
 105     xbt_free(smpi_mpi_global);
 106
 107   }
 108
 109 }
 110
 111 int smpi_mpi_barrier(smpi_mpi_communicator_t comm)
 112 {
 113
 114   SIMIX_mutex_lock(comm->barrier_mutex);
 115   ++comm->barrier_count;
 116   if (comm->barrier_count > comm->size) {       // only happens on second barrier...
 117     comm->barrier_count = 0;
 118   } else if (comm->barrier_count == comm->size) {
 119     SIMIX_cond_broadcast(comm->barrier_cond);
 120   }
 121   while (comm->barrier_count < comm->size) {
 122     SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
 123   }
 124   SIMIX_mutex_unlock(comm->barrier_mutex);
 125
 126   return MPI_SUCCESS;
 127 }
 128
 129 int smpi_mpi_isend(smpi_mpi_request_t request)
 130 {
 131   int retval = MPI_SUCCESS;
 132   int index = smpi_host_index();
 133
 134   if (NULL == request) {
 135     retval = MPI_ERR_INTERN;
 136   } else {
 137     xbt_fifo_push(smpi_global->pending_send_request_queues[index], request);
 138
 139     if (SIMIX_process_is_suspended(smpi_global->sender_processes[index])) {
 140       SIMIX_process_resume(smpi_global->sender_processes[index]);
 141     }
 142   }
 143
 144   return retval;
 145 }
 146
 147 int smpi_mpi_irecv(smpi_mpi_request_t request)
 148 {
 149   int retval = MPI_SUCCESS;
 150   int index = smpi_host_index();
 151
 152   if (NULL == request) {
 153     retval = MPI_ERR_INTERN;
 154   } else {
 155     xbt_fifo_push(smpi_global->pending_recv_request_queues[index], request);
 156
 157     if (SIMIX_process_is_suspended(smpi_global->receiver_processes[index])) {
 158       SIMIX_process_resume(smpi_global->receiver_processes[index]);
 159     }
 160   }
 161
 162   return retval;
 163 }
 164
 165 int smpi_mpi_wait(smpi_mpi_request_t request, smpi_mpi_status_t * status)
 166 {
 167   int retval = MPI_SUCCESS;
 168
 169   if (NULL == request) {
 170     retval = MPI_ERR_INTERN;
 171   } else {
 172     SIMIX_mutex_lock(request->mutex);
 173     while (!request->completed) {
 174       SIMIX_cond_wait(request->cond, request->mutex);
 175     }
 176     if (NULL != status) {
 177       status->MPI_SOURCE = request->src;
 178       status->MPI_TAG = request->tag;
 179       status->MPI_ERROR = MPI_SUCCESS;
 180     }
 181     SIMIX_mutex_unlock(request->mutex);
 182   }
 183
 184   return retval;
 185 }