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