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   SIMIX_process_set_data(SIMIX_process_self(),hdata);
  64
  65   for (i = 0; i < smpi_global->host_count && host != smpi_global->hosts[i]; i++);
  66
  67   hdata->index = i;
  68   hdata->mutex = SIMIX_mutex_init();
  69   hdata->cond = SIMIX_cond_init();
  70   hdata->finalize = 0;
  71
  72   hdata->pending_recv_request_queue = xbt_fifo_new();
  73
  74   hdata->main = SIMIX_process_self();
  75   hdata->sender = SIMIX_process_create("smpi_sender",
  76           smpi_sender, hdata,
  77           SIMIX_host_get_name(SIMIX_host_self()), 0, NULL,
  78           /*props */ NULL);
  79   hdata->receiver = SIMIX_process_create("smpi_receiver",
  80           smpi_receiver, hdata,
  81           SIMIX_host_get_name(SIMIX_host_self()), 0, NULL,
  82           /*props */ NULL);
  83
  84   smpi_global->main_processes[hdata->index] = SIMIX_process_self();
  85   return;
  86 }
  87
  88 void smpi_process_finalize()
  89 {
  90   int i;
  91   smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
  92
  93   i = --smpi_global->running_hosts_count;
  94
  95   hdata->finalize = 2; /* Tell sender and receiver to quit */
  96   SIMIX_process_resume(hdata->sender);
  97   SIMIX_process_resume(hdata->receiver);
  98   while (hdata->finalize>0) { /* wait until it's done */
  99           SIMIX_cond_wait(hdata->cond,hdata->mutex);
 100   }
 101
 102   SIMIX_mutex_destroy(hdata->mutex);
 103   SIMIX_cond_destroy(hdata->cond);
 104   xbt_fifo_free(hdata->pending_recv_request_queue);
 105
 106
 107   if (0 >= i) {
 108
 109     // wake up senders/receivers
 110           /* MQ: (FIXME) Don't do so: it breaks since some hosts are already gone
 111     for (i = 0; i < smpi_global->host_count; i++) {
 112       smpi_host_data_t remote_hdata =  SIMIX_process_get_data(smpi_global->main_processes[i]);
 113
 114       if (SIMIX_process_is_suspended(remote_hdata->sender))
 115         SIMIX_process_resume(remote_hdata->sender);
 116
 117       if (SIMIX_process_is_suspended(remote_hdata->receiver))
 118         SIMIX_process_resume(remote_hdata->receiver);
 119     }*/
 120
 121     SIMIX_mutex_destroy(smpi_mpi_global->mpi_comm_world->barrier_mutex);
 122     SIMIX_cond_destroy(smpi_mpi_global->mpi_comm_world->barrier_cond);
 123     xbt_free(smpi_mpi_global->mpi_comm_world);
 124
 125     xbt_free(smpi_mpi_global->mpi_byte);
 126     xbt_free(smpi_mpi_global->mpi_int);
 127     xbt_free(smpi_mpi_global->mpi_double);
 128
 129     xbt_free(smpi_mpi_global->mpi_land);
 130     xbt_free(smpi_mpi_global->mpi_sum);
 131
 132     xbt_free(smpi_mpi_global);
 133   }
 134 }
 135
 136 int smpi_mpi_barrier(smpi_mpi_communicator_t comm)
 137 {
 138
 139   SIMIX_mutex_lock(comm->barrier_mutex);
 140   ++comm->barrier_count;
 141   if (comm->barrier_count > comm->size) {       // only happens on second barrier...
 142     comm->barrier_count = 0;
 143   } else if (comm->barrier_count == comm->size) {
 144     SIMIX_cond_broadcast(comm->barrier_cond);
 145   }
 146   while (comm->barrier_count < comm->size) {
 147     SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
 148   }
 149   SIMIX_mutex_unlock(comm->barrier_mutex);
 150
 151   return MPI_SUCCESS;
 152 }
 153
 154 int smpi_mpi_isend(smpi_mpi_request_t request)
 155 {
 156         smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
 157   int retval = MPI_SUCCESS;
 158
 159   if (NULL == request) {
 160     retval = MPI_ERR_INTERN;
 161   } else {
 162     xbt_fifo_push(smpi_global->pending_send_request_queues[hdata->index], request);
 163
 164     if (SIMIX_process_is_suspended(hdata->sender)) {
 165       SIMIX_process_resume(hdata->sender);
 166     }
 167   }
 168
 169   return retval;
 170 }
 171
 172 int smpi_mpi_irecv(smpi_mpi_request_t request)
 173 {
 174   int retval = MPI_SUCCESS;
 175   smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
 176
 177   if (NULL == request) {
 178     retval = MPI_ERR_INTERN;
 179   } else {
 180     xbt_fifo_push(hdata->pending_recv_request_queue, request);
 181
 182     if (SIMIX_process_is_suspended(hdata->receiver)) {
 183       SIMIX_process_resume(hdata->receiver);
 184     }
 185   }
 186
 187   return retval;
 188 }
 189
 190 int smpi_mpi_wait(smpi_mpi_request_t request, smpi_mpi_status_t * status)
 191 {
 192   int retval = MPI_SUCCESS;
 193
 194   if (NULL == request) {
 195     retval = MPI_ERR_INTERN;
 196   } else {
 197     SIMIX_mutex_lock(request->mutex);
 198     while (!request->completed) {
 199       SIMIX_cond_wait(request->cond, request->mutex);
 200     }
 201     if (NULL != status) {
 202       status->MPI_SOURCE = request->src;
 203       status->MPI_TAG = request->tag;
 204       status->MPI_ERROR = MPI_SUCCESS;
 205     }
 206     SIMIX_mutex_unlock(request->mutex);
 207   }
 208
 209   return retval;
 210 }