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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
72   hdata->main = SIMIX_process_self();
73   hdata->sender = SIMIX_process_create("smpi_sender",
74           smpi_sender, hdata,
75           SIMIX_host_get_name(SIMIX_host_self()), 0, NULL,
76           /*props */ NULL);
77   hdata->receiver = SIMIX_process_create("smpi_receiver",
78           smpi_receiver, hdata,
79           SIMIX_host_get_name(SIMIX_host_self()), 0, NULL,
80           /*props */ NULL);
81
82   smpi_global->main_processes[hdata->index] = SIMIX_process_self();
83   return;
84 }
85
86 void smpi_process_finalize()
87 {
88   smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
89
90   hdata->finalize = 2; /* Tell sender and receiver to quit */
91   SIMIX_process_resume(hdata->sender);
92   SIMIX_process_resume(hdata->receiver);
93   while (hdata->finalize>0) { /* wait until it's done */
94           SIMIX_cond_wait(hdata->cond,hdata->mutex);
95   }
96
97   SIMIX_mutex_destroy(hdata->mutex);
98   SIMIX_cond_destroy(hdata->cond);
99   xbt_fifo_free(hdata->pending_recv_request_queue);
100 }
101
102 int smpi_mpi_barrier(smpi_mpi_communicator_t comm)
103 {
104
105   SIMIX_mutex_lock(comm->barrier_mutex);
106   ++comm->barrier_count;
107   if (comm->barrier_count > comm->size) {       // only happens on second barrier...
108     comm->barrier_count = 0;
109   } else if (comm->barrier_count == comm->size) {
110     SIMIX_cond_broadcast(comm->barrier_cond);
111   }
112   while (comm->barrier_count < comm->size) {
113     SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
114   }
115   SIMIX_mutex_unlock(comm->barrier_mutex);
116
117   return MPI_SUCCESS;
118 }
119
120 int smpi_mpi_isend(smpi_mpi_request_t request)
121 {
122         smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
123   int retval = MPI_SUCCESS;
124
125   if (NULL == request) {
126     retval = MPI_ERR_INTERN;
127   } else {
128     xbt_fifo_push(smpi_global->pending_send_request_queues[hdata->index], request);
129
130     if (SIMIX_process_is_suspended(hdata->sender)) {
131       SIMIX_process_resume(hdata->sender);
132     }
133   }
134
135   return retval;
136 }
137
138 int smpi_mpi_irecv(smpi_mpi_request_t request)
139 {
140   int retval = MPI_SUCCESS;
141   smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
142
143   if (NULL == request) {
144     retval = MPI_ERR_INTERN;
145   } else {
146     xbt_fifo_push(hdata->pending_recv_request_queue, request);
147
148     if (SIMIX_process_is_suspended(hdata->receiver)) {
149       SIMIX_process_resume(hdata->receiver);
150     }
151   }
152
153   return retval;
154 }
155
156 int smpi_mpi_wait(smpi_mpi_request_t request, smpi_mpi_status_t * status)
157 {
158   int retval = MPI_SUCCESS;
159
160   if (NULL == request) {
161     retval = MPI_ERR_INTERN;
162   } else {
163     SIMIX_mutex_lock(request->mutex);
164     while (!request->completed) {
165       SIMIX_cond_wait(request->cond, request->mutex);
166     }
167     if (NULL != status) {
168       status->MPI_SOURCE = request->src;
169       status->MPI_TAG = request->tag;
170       status->MPI_ERROR = MPI_SUCCESS;
171     }
172     SIMIX_mutex_unlock(request->mutex);
173   }
174
175   return retval;
176 }