src/smpi/smpi_base.c

   1 #include "private.h"
   2
   3 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_base, smpi, "Logging specific to SMPI (base)");
   4 XBT_LOG_EXTERNAL_CATEGORY(smpi_base);
   5 XBT_LOG_EXTERNAL_CATEGORY(smpi_bench);
   6 XBT_LOG_EXTERNAL_CATEGORY(smpi_kernel);
   7 XBT_LOG_EXTERNAL_CATEGORY(smpi_mpi);
   8 XBT_LOG_EXTERNAL_CATEGORY(smpi_receiver);
   9 XBT_LOG_EXTERNAL_CATEGORY(smpi_sender);
  10 XBT_LOG_EXTERNAL_CATEGORY(smpi_util);
  11
  12 smpi_mpi_global_t smpi_mpi_global = NULL;
  13
  14 void smpi_mpi_land_func(void *a, void *b, int *length, MPI_Datatype *datatype);
  15
  16 void smpi_mpi_land_func(void *a, void *b, int *length, MPI_Datatype *datatype)
  17 {
  18         int i;
  19         if (*datatype == smpi_mpi_global->mpi_int) {
  20                 int *x = a, *y = b;
  21                 for (i = 0; i < *length; i++) {
  22                         y[i] = x[i] && y[i];
  23                 }
  24         }
  25 }
  26
  27 void smpi_mpi_sum_func(void *a, void *b, int *length, MPI_Datatype *datatype);
  28
  29 void smpi_mpi_sum_func(void *a, void *b, int *length, MPI_Datatype *datatype)
  30 {
  31         int i;
  32         if (*datatype == smpi_mpi_global->mpi_int) {
  33                 int *x = a, *y = b;
  34                 for (i = 0; i < *length; i++) {
  35                         y[i] = x[i] + y[i];
  36                 }
  37         }
  38 }
  39
  40 int smpi_mpi_comm_rank(smpi_mpi_communicator_t comm)
  41 {
  42         return comm->index_to_rank_map[smpi_host_index()];
  43 }
  44
  45 void smpi_mpi_init()
  46 {
  47         smx_host_t host;
  48         smx_host_t *hosts;
  49         int host_count;
  50         int i;
  51         smpi_host_data_t hdata;
  52
  53         SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
  54         smpi_global->running_hosts_count++;
  55         SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
  56
  57         // initialize some local variables
  58         host       = SIMIX_host_self();
  59         hosts      = SIMIX_host_get_table();
  60         host_count = SIMIX_host_get_number();
  61
  62         hdata      = xbt_new(s_smpi_host_data_t, 1);
  63
  64         for (i = 0; i < host_count && host != hosts[i]; i ++);
  65
  66         hdata->index = i;
  67         hdata->mutex = SIMIX_mutex_init();
  68         hdata->cond  = SIMIX_cond_init();
  69
  70         SIMIX_host_set_data(host, hdata);
  71
  72         // node 0 sets the globals
  73         if (0 == i) {
  74
  75                 smpi_global->hosts                              = hosts;
  76                 smpi_global->host_count                         = host_count;
  77
  78                 smpi_mpi_global                                 = xbt_new(s_smpi_mpi_global_t, 1);
  79
  80                 // global communicator
  81                 smpi_mpi_global->mpi_comm_world                 = xbt_new(s_smpi_mpi_communicator_t, 1);
  82                 smpi_mpi_global->mpi_comm_world->size           = host_count;
  83                 smpi_mpi_global->mpi_comm_world->barrier_count  = 0;
  84                 smpi_mpi_global->mpi_comm_world->barrier_mutex  = SIMIX_mutex_init();
  85                 smpi_mpi_global->mpi_comm_world->barrier_cond   = SIMIX_cond_init();
  86                 smpi_mpi_global->mpi_comm_world->rank_to_index_map = xbt_new(int, host_count);
  87                 smpi_mpi_global->mpi_comm_world->index_to_rank_map = xbt_new(int, host_count);
  88                 for (i = 0; i < host_count; i++) {
  89                         smpi_mpi_global->mpi_comm_world->rank_to_index_map[i] = i;
  90                         smpi_mpi_global->mpi_comm_world->index_to_rank_map[i] = i;
  91                 }
  92
  93                 // mpi datatypes
  94                 smpi_mpi_global->mpi_byte                       = xbt_new(s_smpi_mpi_datatype_t, 1);
  95                 smpi_mpi_global->mpi_byte->size                 = (size_t)1;
  96                 smpi_mpi_global->mpi_int                        = xbt_new(s_smpi_mpi_datatype_t, 1);
  97                 smpi_mpi_global->mpi_int->size                  = sizeof(int);
  98                 smpi_mpi_global->mpi_double                     = xbt_new(s_smpi_mpi_datatype_t, 1);
  99                 smpi_mpi_global->mpi_double->size               = sizeof(double);
 100
 101                 // mpi operations
 102                 smpi_mpi_global->mpi_land                       = xbt_new(s_smpi_mpi_op_t, 1);
 103                 smpi_mpi_global->mpi_land->func                 = smpi_mpi_land_func;
 104                 smpi_mpi_global->mpi_sum                        = xbt_new(s_smpi_mpi_op_t, 1);
 105                 smpi_mpi_global->mpi_sum->func                  = smpi_mpi_sum_func;
 106
 107                 // signal all nodes to perform initialization
 108                 SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 109                 smpi_global->root_ready = 1;
 110                 SIMIX_cond_broadcast(smpi_global->start_stop_cond);
 111                 SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 112
 113         } else {
 114
 115                 // make sure root is done before own initialization
 116                 SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 117                 while (!smpi_global->root_ready) {
 118                         SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
 119                 }
 120                 SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 121
 122         }
 123
 124         // wait for all nodes to signal initializatin complete
 125         SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 126         smpi_global->ready_process_count++;
 127         if (smpi_global->ready_process_count >= 3 * host_count) {
 128                 SIMIX_cond_broadcast(smpi_global->start_stop_cond);
 129         }
 130         while (smpi_global->ready_process_count < 3 * host_count) {
 131                 SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
 132         }
 133         SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 134
 135         return;
 136 }
 137
 138 void smpi_mpi_finalize()
 139 {
 140         int i;
 141
 142         SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
 143         i = --smpi_global->running_hosts_count;
 144         SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
 145
 146         SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 147         smpi_global->ready_process_count--;
 148         SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 149
 150         SIMIX_mutex_destroy(smpi_host_mutex());
 151         SIMIX_cond_destroy(smpi_host_cond());
 152
 153         if (0 >= i) {
 154
 155                 // wake up senders/receivers
 156                 for (i = 0; i < smpi_global->host_count; i++) {
 157                         if (SIMIX_process_is_suspended(smpi_global->sender_processes[i])) {
 158                                 SIMIX_process_resume(smpi_global->sender_processes[i]);
 159                         }
 160                         if (SIMIX_process_is_suspended(smpi_global->receiver_processes[i])) {
 161                                 SIMIX_process_resume(smpi_global->receiver_processes[i]);
 162                         }
 163                 }
 164
 165                 SIMIX_mutex_destroy(smpi_mpi_global->mpi_comm_world->barrier_mutex);
 166                 SIMIX_cond_destroy(smpi_mpi_global->mpi_comm_world->barrier_cond);
 167                 xbt_free(smpi_mpi_global->mpi_comm_world);
 168
 169                 xbt_free(smpi_mpi_global->mpi_byte);
 170                 xbt_free(smpi_mpi_global->mpi_int);
 171                 xbt_free(smpi_mpi_global->mpi_double);
 172
 173                 xbt_free(smpi_mpi_global->mpi_land);
 174                 xbt_free(smpi_mpi_global->mpi_sum);
 175
 176                 xbt_free(smpi_mpi_global);
 177
 178         }
 179
 180 }
 181
 182 int smpi_mpi_barrier(smpi_mpi_communicator_t comm)
 183 {
 184
 185         SIMIX_mutex_lock(comm->barrier_mutex);
 186         ++comm->barrier_count;
 187         if (comm->barrier_count > comm->size) { // only happens on second barrier...
 188                 comm->barrier_count = 0;
 189         } else if (comm->barrier_count == comm->size) {
 190                 SIMIX_cond_broadcast(comm->barrier_cond);
 191         }
 192         while (comm->barrier_count < comm->size) {
 193                 SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
 194         }
 195         SIMIX_mutex_unlock(comm->barrier_mutex);
 196
 197         return MPI_SUCCESS;
 198 }
 199
 200 int smpi_mpi_isend(smpi_mpi_request_t request)
 201 {
 202         int retval = MPI_SUCCESS;
 203         int index  = smpi_host_index();
 204
 205         if (NULL == request) {
 206                 retval = MPI_ERR_INTERN;
 207         } else {
 208                 SIMIX_mutex_lock(smpi_global->pending_send_request_queues_mutexes[index]);
 209                 xbt_fifo_push(smpi_global->pending_send_request_queues[index], request);
 210                 SIMIX_mutex_unlock(smpi_global->pending_send_request_queues_mutexes[index]);
 211
 212                 if (SIMIX_process_is_suspended(smpi_global->sender_processes[index])) {
 213                         SIMIX_process_resume(smpi_global->sender_processes[index]);
 214                 }
 215         }
 216
 217         return retval;
 218 }
 219
 220 int smpi_mpi_irecv(smpi_mpi_request_t request)
 221 {
 222         int retval = MPI_SUCCESS;
 223         int index = smpi_host_index();
 224
 225         if (NULL == request) {
 226                 retval = MPI_ERR_INTERN;
 227         } else {
 228                 SIMIX_mutex_lock(smpi_global->pending_recv_request_queues_mutexes[index]);
 229                 xbt_fifo_push(smpi_global->pending_recv_request_queues[index], request);
 230                 SIMIX_mutex_unlock(smpi_global->pending_recv_request_queues_mutexes[index]);
 231
 232                 if (SIMIX_process_is_suspended(smpi_global->receiver_processes[index])) {
 233                         SIMIX_process_resume(smpi_global->receiver_processes[index]);
 234                 }
 235         }
 236
 237         return retval;
 238 }
 239
 240 int smpi_mpi_wait(smpi_mpi_request_t request, smpi_mpi_status_t *status)
 241 {
 242         int retval = MPI_SUCCESS;
 243
 244         if (NULL == request) {
 245                 retval = MPI_ERR_INTERN;
 246         } else {
 247                 SIMIX_mutex_lock(request->mutex);
 248                 while (!request->completed) {
 249                         SIMIX_cond_wait(request->cond, request->mutex);
 250                 }
 251                 if (NULL != status) {
 252                         status->MPI_SOURCE = request->src;
 253                         status->MPI_TAG    = request->tag;
 254                         status->MPI_ERROR  = MPI_SUCCESS;
 255                 }
 256                 SIMIX_mutex_unlock(request->mutex);
 257         }
 258
 259         return retval;
 260 }