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(int *argc, char***argv)
  51 {
  52   smx_host_t host;
  53   smpi_host_data_t hdata;
  54
  55   // initialize some local variables
  56   host = SIMIX_host_self();
  57
  58   hdata = xbt_new(s_smpi_host_data_t, 1);
  59   SIMIX_host_set_data(host, hdata);
  60   SIMIX_process_set_data(SIMIX_process_self(),hdata);
  61
  62   /* get rank from command line, and remove it from argv */
  63   hdata->index = atoi( (*argv)[1] );
  64   if (*argc>2) {
  65           memmove((*argv)[1],(*argv)[2], sizeof(char*)* (*argc-2));
  66           (*argv)[ (*argc)-1] = NULL;
  67   }
  68   (*argc)--;
  69
  70   hdata->mutex = SIMIX_mutex_init();
  71   hdata->cond = SIMIX_cond_init();
  72   hdata->finalize = 0;
  73
  74   hdata->pending_recv_request_queue = xbt_fifo_new();
  75   hdata->pending_send_request_queue = xbt_fifo_new();
  76   hdata->received_message_queue = xbt_fifo_new();
  77
  78   hdata->main = SIMIX_process_self();
  79   hdata->sender = SIMIX_process_create("smpi_sender",
  80           smpi_sender, hdata,
  81           SIMIX_host_get_name(SIMIX_host_self()), 0, NULL,
  82           /*props */ NULL);
  83   hdata->receiver = SIMIX_process_create("smpi_receiver",
  84           smpi_receiver, hdata,
  85           SIMIX_host_get_name(SIMIX_host_self()), 0, NULL,
  86           /*props */ NULL);
  87
  88   smpi_global->main_processes[hdata->index] = SIMIX_process_self();
  89   return;
  90 }
  91
  92 void smpi_process_finalize()
  93 {
  94   smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
  95
  96   hdata->finalize = 2; /* Tell sender and receiver to quit */
  97   SIMIX_process_resume(hdata->sender);
  98   SIMIX_process_resume(hdata->receiver);
  99   while (hdata->finalize>0) { /* wait until it's done */
 100           SIMIX_cond_wait(hdata->cond,hdata->mutex);
 101   }
 102
 103   SIMIX_mutex_destroy(hdata->mutex);
 104   SIMIX_cond_destroy(hdata->cond);
 105   xbt_fifo_free(hdata->pending_recv_request_queue);
 106   xbt_fifo_free(hdata->pending_send_request_queue);
 107   xbt_fifo_free(hdata->received_message_queue);
 108 }
 109
 110 int smpi_mpi_barrier(smpi_mpi_communicator_t comm)
 111 {
 112
 113   SIMIX_mutex_lock(comm->barrier_mutex);
 114   ++comm->barrier_count;
 115   if (comm->barrier_count > comm->size) {       // only happens on second barrier...
 116     comm->barrier_count = 0;
 117   } else if (comm->barrier_count == comm->size) {
 118     SIMIX_cond_broadcast(comm->barrier_cond);
 119   }
 120   while (comm->barrier_count < comm->size) {
 121     SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
 122   }
 123   SIMIX_mutex_unlock(comm->barrier_mutex);
 124
 125   return MPI_SUCCESS;
 126 }
 127
 128 int smpi_mpi_isend(smpi_mpi_request_t request)
 129 {
 130         smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
 131   int retval = MPI_SUCCESS;
 132
 133   if (NULL == request) {
 134     retval = MPI_ERR_INTERN;
 135   } else {
 136     xbt_fifo_push(hdata->pending_send_request_queue, request);
 137     SIMIX_process_resume(hdata->sender);
 138   }
 139
 140   return retval;
 141 }
 142
 143 int smpi_mpi_irecv(smpi_mpi_request_t request)
 144 {
 145   int retval = MPI_SUCCESS;
 146   smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
 147
 148   if (NULL == request) {
 149     retval = MPI_ERR_INTERN;
 150   } else {
 151     xbt_fifo_push(hdata->pending_recv_request_queue, request);
 152
 153     if (SIMIX_process_is_suspended(hdata->receiver)) {
 154       SIMIX_process_resume(hdata->receiver);
 155     }
 156   }
 157
 158   return retval;
 159 }
 160
 161 int smpi_mpi_wait(smpi_mpi_request_t request, smpi_mpi_status_t * status)
 162 {
 163   int retval = MPI_SUCCESS;
 164
 165   if (NULL == request) {
 166     retval = MPI_ERR_INTERN;
 167   } else {
 168     SIMIX_mutex_lock(request->mutex);
 169     while (!request->completed) {
 170       SIMIX_cond_wait(request->cond, request->mutex);
 171     }
 172     if (NULL != status) {
 173       status->MPI_SOURCE = request->src;
 174       status->MPI_TAG = request->tag;
 175       status->MPI_ERROR = MPI_SUCCESS;
 176     }
 177     SIMIX_mutex_unlock(request->mutex);
 178   }
 179
 180   return retval;
 181 }