1 /* Copyright (c) 2007-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "smpi_mpi_dt_private.h"
11 #include "src/mc/mc_record.h"
12 #include "xbt/replay.h"
13 #include "surf/surf.h"
14 #include "src/simix/smx_private.h"
15 #include "simgrid/sg_config.h"
16 #include "src/mc/mc_replay.h"
17 #include "src/msg/msg_private.h"
18 #include "src/simix/SynchroComm.hpp"
21 #include <float.h> /* DBL_MAX */
26 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_kernel, smpi, "Logging specific to SMPI (kernel)");
28 typedef struct s_smpi_process_data {
32 smx_mailbox_t mailbox;
33 smx_mailbox_t mailbox_small;
34 xbt_mutex_t mailboxes_mutex;
39 void *data; /* user data */
42 int sampling; /* inside an SMPI_SAMPLE_ block? */
44 int replaying; /* is the process replaying a trace */
45 xbt_bar_t finalization_barrier;
47 } s_smpi_process_data_t;
49 static smpi_process_data_t *process_data = NULL;
50 int process_count = 0;
51 int smpi_universe_size = 0;
52 int* index_to_process_data = NULL;
53 extern double smpi_total_benched_time;
54 xbt_os_timer_t global_timer;
55 MPI_Comm MPI_COMM_WORLD = MPI_COMM_UNINITIALIZED;
56 MPI_Errhandler *MPI_ERRORS_RETURN = NULL;
57 MPI_Errhandler *MPI_ERRORS_ARE_FATAL = NULL;
58 MPI_Errhandler *MPI_ERRHANDLER_NULL = NULL;
60 #define MAILBOX_NAME_MAXLEN (5 + sizeof(int) * 2 + 1)
62 static char *get_mailbox_name(char *str, int index)
64 snprintf(str, MAILBOX_NAME_MAXLEN, "SMPI-%0*x", (int) (sizeof(int) * 2), index);
68 static char *get_mailbox_name_small(char *str, int index)
70 snprintf(str, MAILBOX_NAME_MAXLEN, "small%0*x", (int) (sizeof(int) * 2), index);
74 void smpi_process_init(int *argc, char ***argv)
77 smpi_process_data_t data;
81 proc = SIMIX_process_self();
82 //FIXME: dirty cleanup method to avoid using msg cleanup functions on these processes when using MSG+SMPI
83 SIMIX_process_set_cleanup_function(proc, MSG_process_cleanup_from_SIMIX);
84 char* instance_id = (*argv)[1];
85 int rank = xbt_str_parse_int((*argv)[2], "Invalid rank: %s");
86 index = smpi_process_index_of_smx_process(proc);
88 if(!index_to_process_data){
89 index_to_process_data=(int*)xbt_malloc(SIMIX_process_count()*sizeof(int));
92 if(smpi_privatize_global_variables){
93 /* Now using segment index of the process */
94 index = proc->segment_index;
95 /* Done at the process's creation */
96 SMPI_switch_data_segment(index);
99 MPI_Comm* temp_comm_world;
101 smpi_deployment_register_process(instance_id, rank, index, &temp_comm_world, &temp_bar);
102 data = smpi_process_remote_data(index);
103 data->comm_world = temp_comm_world;
104 if(temp_bar != NULL) data->finalization_barrier = temp_bar;
106 data->instance_id = instance_id;
108 //xbt_free(simcall_process_get_data(proc));
110 simdata_process_t simdata = static_cast<simdata_process_t>(simcall_process_get_data(proc));
111 simdata->data = data;
115 memmove(&(*argv)[0], &(*argv)[2], sizeof(char *) * (*argc - 2));
116 (*argv)[(*argc) - 1] = NULL;
117 (*argv)[(*argc) - 2] = NULL;
122 // set the process attached to the mailbox
123 simcall_mbox_set_receiver(data->mailbox_small, proc);
124 XBT_DEBUG("<%d> New process in the game: %p", index, proc);
126 xbt_assert(smpi_process_data(),
127 "smpi_process_data() returned NULL. You probably gave a NULL parameter to MPI_Init. Although it's required by "
128 "MPI-2, this is currently not supported by SMPI.");
131 void smpi_process_destroy(void)
133 int index = smpi_process_index();
134 if(smpi_privatize_global_variables){
135 smpi_switch_data_segment(index);
137 process_data[index_to_process_data[index]]->state = SMPI_FINALIZED;
138 XBT_DEBUG("<%d> Process left the game", index);
141 /** @brief Prepares the current process for termination. */
142 void smpi_process_finalize(void)
144 // This leads to an explosion of the search graph which cannot be reduced:
145 if(MC_is_active() || MC_record_replay_is_active())
148 int index = smpi_process_index();
149 // wait for all pending asynchronous comms to finish
150 xbt_barrier_wait(process_data[index_to_process_data[index]]->finalization_barrier);
153 /** @brief Check if a process is finalized */
154 int smpi_process_finalized()
156 int index = smpi_process_index();
157 if (index != MPI_UNDEFINED)
158 return (process_data[index_to_process_data[index]]->state == SMPI_FINALIZED);
163 /** @brief Check if a process is initialized */
164 int smpi_process_initialized(void)
166 if (!index_to_process_data){
169 int index = smpi_process_index();
170 return ((index != MPI_UNDEFINED) && (process_data[index_to_process_data[index]]->state == SMPI_INITIALIZED));
174 /** @brief Mark a process as initialized (=MPI_Init called) */
175 void smpi_process_mark_as_initialized(void)
177 int index = smpi_process_index();
178 if ((index != MPI_UNDEFINED) && (process_data[index_to_process_data[index]]->state != SMPI_FINALIZED))
179 process_data[index_to_process_data[index]]->state = SMPI_INITIALIZED;
182 void smpi_process_set_replaying(int value){
183 int index = smpi_process_index();
184 if ((index != MPI_UNDEFINED) && (process_data[index_to_process_data[index]]->state != SMPI_FINALIZED))
185 process_data[index_to_process_data[index]]->replaying = value;
188 int smpi_process_get_replaying(){
189 int index = smpi_process_index();
190 if (index != MPI_UNDEFINED)
191 return process_data[index_to_process_data[index]]->replaying;
192 else return _xbt_replay_is_active();
195 int smpi_global_size(void)
197 char *value = getenv("SMPI_GLOBAL_SIZE");
198 xbt_assert(value,"Please set env var SMPI_GLOBAL_SIZE to the expected number of processes.");
200 return xbt_str_parse_int(value, "SMPI_GLOBAL_SIZE contains a non-numerical value: %s");
203 smpi_process_data_t smpi_process_data(void)
205 simdata_process_t simdata = static_cast<simdata_process_t>(SIMIX_process_self_get_data());
206 return static_cast<smpi_process_data_t>(simdata->data);
209 smpi_process_data_t smpi_process_remote_data(int index)
211 return process_data[index_to_process_data[index]];
214 void smpi_process_set_user_data(void *data)
216 smpi_process_data_t process_data = smpi_process_data();
217 process_data->data = data;
220 void *smpi_process_get_user_data()
222 smpi_process_data_t process_data = smpi_process_data();
223 return process_data->data;
226 int smpi_process_count(void)
228 return process_count;
231 int smpi_process_index(void)
233 smpi_process_data_t data = smpi_process_data();
234 //return -1 if not initialized
235 return data ? data->index : MPI_UNDEFINED;
238 MPI_Comm smpi_process_comm_world(void)
240 smpi_process_data_t data = smpi_process_data();
241 //return MPI_COMM_NULL if not initialized
242 return data ? *data->comm_world : MPI_COMM_NULL;
245 smx_mailbox_t smpi_process_mailbox(void)
247 smpi_process_data_t data = smpi_process_data();
248 return data->mailbox;
251 smx_mailbox_t smpi_process_mailbox_small(void)
253 smpi_process_data_t data = smpi_process_data();
254 return data->mailbox_small;
257 xbt_mutex_t smpi_process_mailboxes_mutex(void)
259 smpi_process_data_t data = smpi_process_data();
260 return data->mailboxes_mutex;
263 smx_mailbox_t smpi_process_remote_mailbox(int index)
265 smpi_process_data_t data = smpi_process_remote_data(index);
266 return data->mailbox;
269 smx_mailbox_t smpi_process_remote_mailbox_small(int index)
271 smpi_process_data_t data = smpi_process_remote_data(index);
272 return data->mailbox_small;
275 xbt_mutex_t smpi_process_remote_mailboxes_mutex(int index)
277 smpi_process_data_t data = smpi_process_remote_data(index);
278 return data->mailboxes_mutex;
281 xbt_os_timer_t smpi_process_timer(void)
283 smpi_process_data_t data = smpi_process_data();
287 void smpi_process_simulated_start(void)
289 smpi_process_data_t data = smpi_process_data();
290 data->simulated = SIMIX_get_clock();
293 double smpi_process_simulated_elapsed(void)
295 smpi_process_data_t data = smpi_process_data();
296 return SIMIX_get_clock() - data->simulated;
299 MPI_Comm smpi_process_comm_self(void)
301 smpi_process_data_t data = smpi_process_data();
302 if(data->comm_self==MPI_COMM_NULL){
303 MPI_Group group = smpi_group_new(1);
304 data->comm_self = smpi_comm_new(group, NULL);
305 smpi_group_set_mapping(group, smpi_process_index(), 0);
308 return data->comm_self;
311 MPI_Comm smpi_process_get_comm_intra(void)
313 smpi_process_data_t data = smpi_process_data();
314 return data->comm_intra;
317 void smpi_process_set_comm_intra(MPI_Comm comm)
319 smpi_process_data_t data = smpi_process_data();
320 data->comm_intra = comm;
323 void smpi_process_set_sampling(int s)
325 smpi_process_data_t data = smpi_process_data();
329 int smpi_process_get_sampling(void)
331 smpi_process_data_t data = smpi_process_data();
332 return data->sampling;
335 void print_request(const char *message, MPI_Request request)
337 XBT_VERB("%s request %p [buf = %p, size = %zu, src = %d, dst = %d, tag = %d, flags = %x]",
338 message, request, request->buf, request->size, request->src, request->dst, request->tag, request->flags);
341 void smpi_comm_copy_buffer_callback(smx_synchro_t synchro, void *buff, size_t buff_size)
343 XBT_DEBUG("Copy the data over");
345 simgrid::simix::Comm *comm = dynamic_cast<simgrid::simix::Comm*>(synchro);
347 if((smpi_privatize_global_variables) && ((char*)buff >= smpi_start_data_exe)
348 && ((char*)buff < smpi_start_data_exe + smpi_size_data_exe )
350 XBT_DEBUG("Privatization : We are copying from a zone inside global memory... Saving data to temp buffer !");
353 smpi_switch_data_segment(((smpi_process_data_t)(((simdata_process_t)SIMIX_process_get_data(comm->src_proc))->data))->index);
354 tmpbuff = (void*)xbt_malloc(buff_size);
355 memcpy(tmpbuff, buff, buff_size);
358 if((smpi_privatize_global_variables) && ((char*)comm->dst_buff >= smpi_start_data_exe)
359 && ((char*)comm->dst_buff < smpi_start_data_exe + smpi_size_data_exe )){
360 XBT_DEBUG("Privatization : We are copying to a zone inside global memory - Switch data segment");
361 smpi_switch_data_segment(((smpi_process_data_t)(((simdata_process_t)SIMIX_process_get_data(comm->dst_proc))->data))->index);
364 memcpy(comm->dst_buff, tmpbuff, buff_size);
365 if (comm->detached) {
366 // if this is a detached send, the source buffer was duplicated by SMPI
367 // sender to make the original buffer available to the application ASAP
369 //It seems that the request is used after the call there this should be free somewhere else but where???
370 //xbt_free(comm->comm.src_data);// inside SMPI the request is kept inside the user data and should be free
371 comm->src_buff = NULL;
374 if(tmpbuff!=buff)xbt_free(tmpbuff);
377 void smpi_comm_null_copy_buffer_callback(smx_synchro_t comm, void *buff, size_t buff_size)
382 static void smpi_check_options(){
383 //check correctness of MPI parameters
385 xbt_assert(xbt_cfg_get_int("smpi/async-small-thresh") <= xbt_cfg_get_int("smpi/send-is-detached-thresh"));
387 if (xbt_cfg_is_default_value("smpi/running-power")) {
388 XBT_INFO("You did not set the power of the host running the simulation. "
389 "The timings will certainly not be accurate. "
390 "Use the option \"--cfg=smpi/running-power:<flops>\" to set its value."
391 "Check http://simgrid.org/simgrid/latest/doc/options.html#options_smpi_bench for more information.");
395 int smpi_enabled(void) {
396 return process_data != NULL;
399 void smpi_global_init(void)
403 char name[MAILBOX_NAME_MAXLEN];
406 if (!MC_is_active()) {
407 global_timer = xbt_os_timer_new();
408 xbt_os_walltimer_start(global_timer);
410 if (process_count == 0){
411 process_count = SIMIX_process_count();
414 smpi_universe_size = process_count;
415 process_data = xbt_new0(smpi_process_data_t, process_count);
416 for (i = 0; i < process_count; i++) {
417 process_data[i] = xbt_new(s_smpi_process_data_t, 1);
418 //process_data[i]->index = i;
419 process_data[i]->argc = NULL;
420 process_data[i]->argv = NULL;
421 process_data[i]->mailbox = simcall_mbox_create(get_mailbox_name(name, i));
422 process_data[i]->mailbox_small = simcall_mbox_create(get_mailbox_name_small(name, i));
423 process_data[i]->mailboxes_mutex = xbt_mutex_init();
424 process_data[i]->timer = xbt_os_timer_new();
426 MC_ignore_heap(process_data[i]->timer, xbt_os_timer_size());
427 process_data[i]->comm_self = MPI_COMM_NULL;
428 process_data[i]->comm_intra = MPI_COMM_NULL;
429 process_data[i]->comm_world = NULL;
430 process_data[i]->state = SMPI_UNINITIALIZED;
431 process_data[i]->sampling = 0;
432 process_data[i]->finalization_barrier = NULL;
433 process_data[i]->return_value = 0;
435 //if the process was launched through smpirun script we generate a global mpi_comm_world
436 //if not, we let MPI_COMM_NULL, and the comm world will be private to each mpi instance
438 group = smpi_group_new(process_count);
439 MPI_COMM_WORLD = smpi_comm_new(group, NULL);
440 MPI_Attr_put(MPI_COMM_WORLD, MPI_UNIVERSE_SIZE, (void *)(MPI_Aint)process_count);
441 xbt_bar_t bar=xbt_barrier_init(process_count);
443 for (i = 0; i < process_count; i++) {
444 smpi_group_set_mapping(group, i, i);
445 process_data[i]->finalization_barrier = bar;
450 void smpi_global_destroy(void)
452 int count = smpi_process_count();
455 smpi_bench_destroy();
456 if (MPI_COMM_WORLD != MPI_COMM_UNINITIALIZED){
457 while (smpi_group_unuse(smpi_comm_group(MPI_COMM_WORLD)) > 0);
458 xbt_barrier_destroy(process_data[0]->finalization_barrier);
460 smpi_deployment_cleanup_instances();
462 for (i = 0; i < count; i++) {
463 if(process_data[i]->comm_self!=MPI_COMM_NULL){
464 smpi_comm_destroy(process_data[i]->comm_self);
466 if(process_data[i]->comm_intra!=MPI_COMM_NULL){
467 smpi_comm_destroy(process_data[i]->comm_intra);
469 xbt_os_timer_free(process_data[i]->timer);
470 xbt_mutex_destroy(process_data[i]->mailboxes_mutex);
471 xbt_free(process_data[i]);
473 xbt_free(process_data);
476 if (MPI_COMM_WORLD != MPI_COMM_UNINITIALIZED){
477 smpi_comm_cleanup_smp(MPI_COMM_WORLD);
478 smpi_comm_cleanup_attributes(MPI_COMM_WORLD);
479 if(smpi_coll_cleanup_callback!=NULL)
480 smpi_coll_cleanup_callback();
481 xbt_free(MPI_COMM_WORLD);
484 MPI_COMM_WORLD = MPI_COMM_NULL;
486 if (!MC_is_active()) {
487 xbt_os_timer_free(global_timer);
490 xbt_free(index_to_process_data);
491 if(smpi_privatize_global_variables)
492 smpi_destroy_global_memory_segments();
498 void __attribute__ ((weak)) user_main_()
500 xbt_die("Should not be in this smpi_simulated_main");
504 int __attribute__ ((weak)) smpi_simulated_main_(int argc, char **argv)
506 smpi_process_init(&argc, &argv);
511 inline static int smpi_main_wrapper(int argc, char **argv){
512 int ret = smpi_simulated_main_(argc,argv);
514 XBT_WARN("SMPI process did not return 0. Return value : %d", ret);
515 smpi_process_data()->return_value=ret;
520 int __attribute__ ((weak)) main(int argc, char **argv)
522 return smpi_main(smpi_main_wrapper, argc, argv);
528 static void smpi_init_logs(){
530 /* Connect log categories. See xbt/log.c */
532 XBT_LOG_CONNECT(smpi); /* Keep this line as soon as possible in this function: xbt_log_appender_file.c depends on it
533 DO NOT connect this in XBT or so, or it will be useless to xbt_log_appender_file.c */
534 XBT_LOG_CONNECT(instr_smpi);
535 XBT_LOG_CONNECT(smpi_base);
536 XBT_LOG_CONNECT(smpi_bench);
537 XBT_LOG_CONNECT(smpi_coll);
538 XBT_LOG_CONNECT(smpi_colls);
539 XBT_LOG_CONNECT(smpi_comm);
540 XBT_LOG_CONNECT(smpi_dvfs);
541 XBT_LOG_CONNECT(smpi_group);
542 XBT_LOG_CONNECT(smpi_kernel);
543 XBT_LOG_CONNECT(smpi_mpi);
544 XBT_LOG_CONNECT(smpi_mpi_dt);
545 XBT_LOG_CONNECT(smpi_pmpi);
546 XBT_LOG_CONNECT(smpi_replay);
547 XBT_LOG_CONNECT(smpi_rma);
551 static void smpi_init_options(){
552 int gather_id = find_coll_description(mpi_coll_gather_description, xbt_cfg_get_string("smpi/gather"),"gather");
553 mpi_coll_gather_fun = (int (*)(void *, int, MPI_Datatype, void *, int, MPI_Datatype, int, MPI_Comm))
554 mpi_coll_gather_description[gather_id].coll;
556 int allgather_id = find_coll_description(mpi_coll_allgather_description,
557 xbt_cfg_get_string("smpi/allgather"),"allgather");
558 mpi_coll_allgather_fun = (int (*)(void *, int, MPI_Datatype, void *, int, MPI_Datatype, MPI_Comm))
559 mpi_coll_allgather_description[allgather_id].coll;
561 int allgatherv_id = find_coll_description(mpi_coll_allgatherv_description,
562 xbt_cfg_get_string("smpi/allgatherv"),"allgatherv");
563 mpi_coll_allgatherv_fun = (int (*)(void *, int, MPI_Datatype, void *, int *, int *, MPI_Datatype, MPI_Comm))
564 mpi_coll_allgatherv_description[allgatherv_id].coll;
566 int allreduce_id = find_coll_description(mpi_coll_allreduce_description,
567 xbt_cfg_get_string("smpi/allreduce"),"allreduce");
568 mpi_coll_allreduce_fun = (int (*)(void *sbuf, void *rbuf, int rcount, MPI_Datatype dtype, MPI_Op op, MPI_Comm comm))
569 mpi_coll_allreduce_description[allreduce_id].coll;
571 int alltoall_id = find_coll_description(mpi_coll_alltoall_description,
572 xbt_cfg_get_string("smpi/alltoall"),"alltoall");
573 mpi_coll_alltoall_fun = (int (*)(void *, int, MPI_Datatype, void *, int, MPI_Datatype, MPI_Comm))
574 mpi_coll_alltoall_description[alltoall_id].coll;
576 int alltoallv_id = find_coll_description(mpi_coll_alltoallv_description,
577 xbt_cfg_get_string("smpi/alltoallv"),"alltoallv");
578 mpi_coll_alltoallv_fun = (int (*)(void *, int *, int *, MPI_Datatype, void *, int *, int *, MPI_Datatype, MPI_Comm))
579 mpi_coll_alltoallv_description[alltoallv_id].coll;
581 int bcast_id = find_coll_description(mpi_coll_bcast_description, xbt_cfg_get_string("smpi/bcast"),"bcast");
582 mpi_coll_bcast_fun = (int (*)(void *buf, int count, MPI_Datatype datatype, int root, MPI_Comm com))
583 mpi_coll_bcast_description[bcast_id].coll;
585 int reduce_id = find_coll_description(mpi_coll_reduce_description, xbt_cfg_get_string("smpi/reduce"),"reduce");
586 mpi_coll_reduce_fun = (int (*)(void *buf, void *rbuf, int count, MPI_Datatype datatype, MPI_Op op, int root,
587 MPI_Comm comm)) mpi_coll_reduce_description[reduce_id].coll;
589 int reduce_scatter_id =
590 find_coll_description(mpi_coll_reduce_scatter_description,
591 xbt_cfg_get_string("smpi/reduce-scatter"),"reduce_scatter");
592 mpi_coll_reduce_scatter_fun = (int (*)(void *sbuf, void *rbuf, int *rcounts,MPI_Datatype dtype, MPI_Op op,
593 MPI_Comm comm)) mpi_coll_reduce_scatter_description[reduce_scatter_id].coll;
595 int scatter_id = find_coll_description(mpi_coll_scatter_description, xbt_cfg_get_string("smpi/scatter"),"scatter");
596 mpi_coll_scatter_fun = (int (*)(void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recvbuf,
597 int recvcount, MPI_Datatype recvtype, int root, MPI_Comm comm))
598 mpi_coll_scatter_description[scatter_id].coll;
600 int barrier_id = find_coll_description(mpi_coll_barrier_description, xbt_cfg_get_string("smpi/barrier"),"barrier");
601 mpi_coll_barrier_fun = (int (*)(MPI_Comm comm)) mpi_coll_barrier_description[barrier_id].coll;
603 smpi_coll_cleanup_callback=NULL;
604 smpi_cpu_threshold = xbt_cfg_get_double("smpi/cpu-threshold");
605 smpi_running_power = xbt_cfg_get_double("smpi/running-power");
606 smpi_privatize_global_variables = xbt_cfg_get_boolean("smpi/privatize-global-variables");
607 if (smpi_cpu_threshold < 0)
608 smpi_cpu_threshold = DBL_MAX;
611 int smpi_main(int (*realmain) (int argc, char *argv[]), int argc, char *argv[])
613 srand(SMPI_RAND_SEED);
615 if (getenv("SMPI_PRETEND_CC") != NULL) {
616 /* Hack to ensure that smpicc can pretend to be a simple compiler. Particularly handy to pass it to the
617 * configuration tools */
622 TRACE_global_init(&argc, argv);
623 TRACE_add_start_function(TRACE_smpi_alloc);
624 TRACE_add_end_function(TRACE_smpi_release);
626 SIMIX_global_init(&argc, argv);
627 MSG_init(&argc,argv);
629 SMPI_switch_data_segment = smpi_switch_data_segment;
633 // parse the platform file: get the host list
634 SIMIX_create_environment(argv[1]);
635 SIMIX_comm_set_copy_data_callback(&smpi_comm_copy_buffer_callback);
636 SIMIX_function_register_default(realmain);
637 SIMIX_launch_application(argv[2]);
641 smpi_check_options();
643 if(smpi_privatize_global_variables)
644 smpi_initialize_global_memory_segments();
646 /* Clean IO before the run */
650 if (MC_is_active()) {
656 xbt_os_walltimer_stop(global_timer);
657 if (xbt_cfg_get_boolean("smpi/display-timing")){
658 double global_time = xbt_os_timer_elapsed(global_timer);
659 XBT_INFO("Simulated time: %g seconds. \n\n"
660 "The simulation took %g seconds (after parsing and platform setup)\n"
661 "%g seconds were actual computation of the application",
662 SIMIX_get_clock(), global_time , smpi_total_benched_time);
664 if (smpi_total_benched_time/global_time>=0.75)
665 XBT_INFO("More than 75%% of the time was spent inside the application code.\n"
666 "You may want to use sampling functions or trace replay to reduce this.");
669 int count = smpi_process_count();
671 for (i = 0; i < count; i++) {
672 if(process_data[i]->return_value!=0){
673 ret=process_data[i]->return_value;//return first non 0 value
677 smpi_global_destroy();
684 // This function can be called from extern file, to initialize logs, options, and processes of smpi
685 // without the need of smpirun
690 smpi_check_options();
691 if (TRACE_is_enabled() && TRACE_is_configured())
693 if(smpi_privatize_global_variables)
694 smpi_initialize_global_memory_segments();
697 void SMPI_finalize(){
698 smpi_global_destroy();