src/smpi/smpi_base.c

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