1 /* Copyright (c) 2007-2017. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
10 #include <sys/types.h>
15 #include "private.hpp"
16 #include "simgrid/s4u/Mailbox.hpp"
17 #include "smpi/smpi_shared_malloc.hpp"
18 #include "simgrid/sg_config.h"
19 #include "src/kernel/activity/SynchroComm.hpp"
20 #include "src/mc/mc_record.h"
21 #include "src/mc/mc_replay.h"
22 #include "src/msg/msg_private.h"
23 #include "src/simix/smx_private.h"
24 #include "src/surf/surf_interface.hpp"
25 #include "src/smpi/SmpiHost.hpp"
26 #include "surf/surf.h"
27 #include "xbt/replay.hpp"
28 #include <xbt/config.hpp>
30 #include <float.h> /* DBL_MAX */
42 #include <sys/sendfile.h>
45 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_kernel, smpi, "Logging specific to SMPI (kernel)");
46 #include <boost/tokenizer.hpp>
47 #include <boost/algorithm/string.hpp> /* trim_right / trim_left */
50 /* RTLD_DEEPBIND is a bad idea of GNU ld that obviously does not exist on other platforms
51 * See https://www.akkadia.org/drepper/dsohowto.pdf
52 * and https://lists.freebsd.org/pipermail/freebsd-current/2016-March/060284.html
54 #define RTLD_DEEPBIND 0
57 /* Mac OSX does not have any header file providing that definition so we have to duplicate it here. Bummers. */
58 extern char** environ; /* we use it in posix_spawnp below */
62 const char* papi_default_config_name = "default";
64 struct papi_process_data {
65 papi_counter_t counter_data;
70 std::unordered_map<std::string, double> location2speedup;
72 simgrid::smpi::Process **process_data = nullptr;
73 int process_count = 0;
74 int smpi_universe_size = 0;
75 int* index_to_process_data = nullptr;
76 extern double smpi_total_benched_time;
77 xbt_os_timer_t global_timer;
78 MPI_Comm MPI_COMM_WORLD = MPI_COMM_UNINITIALIZED;
79 MPI_Errhandler *MPI_ERRORS_RETURN = nullptr;
80 MPI_Errhandler *MPI_ERRORS_ARE_FATAL = nullptr;
81 MPI_Errhandler *MPI_ERRHANDLER_NULL = nullptr;
82 static simgrid::config::Flag<double> smpi_wtime_sleep(
83 "smpi/wtime", "Minimum time to inject inside a call to MPI_Wtime", 0.0);
84 static simgrid::config::Flag<double> smpi_init_sleep(
85 "smpi/init", "Time to inject inside a call to MPI_Init", 0.0);
87 void (*smpi_comm_copy_data_callback) (smx_activity_t, void*, size_t) = &smpi_comm_copy_buffer_callback;
91 int smpi_process_count()
96 simgrid::smpi::Process* smpi_process()
98 smx_actor_t me = SIMIX_process_self();
99 if (me == nullptr) // This happens sometimes (eg, when linking against NS3 because it pulls openMPI...)
101 simgrid::MsgActorExt* msgExt = static_cast<simgrid::MsgActorExt*>(me->data);
102 return static_cast<simgrid::smpi::Process*>(msgExt->data);
105 simgrid::smpi::Process* smpi_process_remote(int index)
107 return process_data[index_to_process_data[index]];
110 MPI_Comm smpi_process_comm_self(){
111 return smpi_process()->comm_self();
114 void smpi_process_init(int *argc, char ***argv){
115 simgrid::smpi::Process::init(argc, argv);
118 int smpi_process_index(){
119 return smpi_process()->index();
123 int smpi_global_size()
125 char *value = getenv("SMPI_GLOBAL_SIZE");
126 xbt_assert(value,"Please set env var SMPI_GLOBAL_SIZE to the expected number of processes.");
128 return xbt_str_parse_int(value, "SMPI_GLOBAL_SIZE contains a non-numerical value: %s");
131 void smpi_comm_set_copy_data_callback(void (*callback) (smx_activity_t, void*, size_t))
133 smpi_comm_copy_data_callback = callback;
136 static void print(std::vector<std::pair<size_t, size_t>> vec) {
137 std::fprintf(stderr, "{");
138 for (auto elt : vec) {
139 std::fprintf(stderr, "(0x%zx, 0x%zx),", elt.first, elt.second);
141 std::fprintf(stderr, "}\n");
143 static void memcpy_private(void* dest, const void* src, std::vector<std::pair<size_t, size_t>>& private_blocks)
145 for(auto block : private_blocks) {
146 memcpy((uint8_t*)dest+block.first, (uint8_t*)src+block.first, block.second-block.first);
150 static void check_blocks(std::vector<std::pair<size_t, size_t>> &private_blocks, size_t buff_size) {
151 for(auto block : private_blocks) {
152 xbt_assert(block.first <= block.second && block.second <= buff_size, "Oops, bug in shared malloc.");
156 void smpi_comm_copy_buffer_callback(smx_activity_t synchro, void *buff, size_t buff_size)
158 simgrid::kernel::activity::Comm *comm = dynamic_cast<simgrid::kernel::activity::Comm*>(synchro);
161 size_t src_offset = 0;
162 size_t dst_offset = 0;
163 std::vector<std::pair<size_t, size_t>> src_private_blocks;
164 std::vector<std::pair<size_t, size_t>> dst_private_blocks;
165 XBT_DEBUG("Copy the data over");
166 if((src_shared=smpi_is_shared(buff, src_private_blocks, &src_offset))) {
167 XBT_DEBUG("Sender %p is shared. Let's ignore it.", buff);
168 src_private_blocks = shift_and_frame_private_blocks(src_private_blocks, src_offset, buff_size);
171 src_private_blocks.clear();
172 src_private_blocks.push_back(std::make_pair(0, buff_size));
174 if((dst_shared=smpi_is_shared((char*)comm->dst_buff, dst_private_blocks, &dst_offset))) {
175 XBT_DEBUG("Receiver %p is shared. Let's ignore it.", (char*)comm->dst_buff);
176 dst_private_blocks = shift_and_frame_private_blocks(dst_private_blocks, dst_offset, buff_size);
179 dst_private_blocks.clear();
180 dst_private_blocks.push_back(std::make_pair(0, buff_size));
182 check_blocks(src_private_blocks, buff_size);
183 check_blocks(dst_private_blocks, buff_size);
184 auto private_blocks = merge_private_blocks(src_private_blocks, dst_private_blocks);
185 check_blocks(private_blocks, buff_size);
187 if((smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP) && (static_cast<char*>(buff) >= smpi_start_data_exe)
188 && (static_cast<char*>(buff) < smpi_start_data_exe + smpi_size_data_exe )
190 XBT_DEBUG("Privatization : We are copying from a zone inside global memory... Saving data to temp buffer !");
192 smpi_switch_data_segment(
193 (static_cast<simgrid::smpi::Process*>((static_cast<simgrid::MsgActorExt*>(comm->src_proc->data)->data))->index()));
194 tmpbuff = static_cast<void*>(xbt_malloc(buff_size));
195 memcpy_private(tmpbuff, buff, private_blocks);
198 if((smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP) && ((char*)comm->dst_buff >= smpi_start_data_exe)
199 && ((char*)comm->dst_buff < smpi_start_data_exe + smpi_size_data_exe )){
200 XBT_DEBUG("Privatization : We are copying to a zone inside global memory - Switch data segment");
201 smpi_switch_data_segment(
202 (static_cast<simgrid::smpi::Process*>((static_cast<simgrid::MsgActorExt*>(comm->dst_proc->data)->data))->index()));
204 XBT_DEBUG("Copying %zu bytes from %p to %p", buff_size, tmpbuff,comm->dst_buff);
205 memcpy_private(comm->dst_buff, tmpbuff, private_blocks);
207 if (comm->detached) {
208 // if this is a detached send, the source buffer was duplicated by SMPI
209 // sender to make the original buffer available to the application ASAP
211 //It seems that the request is used after the call there this should be free somewhere else but where???
212 //xbt_free(comm->comm.src_data);// inside SMPI the request is kept inside the user data and should be free
213 comm->src_buff = nullptr;
215 if(tmpbuff!=buff)xbt_free(tmpbuff);
219 void smpi_comm_null_copy_buffer_callback(smx_activity_t comm, void *buff, size_t buff_size)
221 /* nothing done in this version */
224 static void smpi_check_options(){
225 //check correctness of MPI parameters
227 xbt_assert(xbt_cfg_get_int("smpi/async-small-thresh") <= xbt_cfg_get_int("smpi/send-is-detached-thresh"));
229 if (xbt_cfg_is_default_value("smpi/host-speed")) {
230 XBT_INFO("You did not set the power of the host running the simulation. "
231 "The timings will certainly not be accurate. "
232 "Use the option \"--cfg=smpi/host-speed:<flops>\" to set its value."
233 "Check http://simgrid.org/simgrid/latest/doc/options.html#options_smpi_bench for more information.");
236 xbt_assert(xbt_cfg_get_double("smpi/cpu-threshold") >=0,
237 "The 'smpi/cpu-threshold' option cannot have negative values [anymore]. If you want to discard "
238 "the simulation of any computation, please use 'smpi/simulate-computation:no' instead.");
242 return process_data != nullptr;
245 void smpi_global_init()
249 if (!MC_is_active()) {
250 global_timer = xbt_os_timer_new();
251 xbt_os_walltimer_start(global_timer);
254 if (xbt_cfg_get_string("smpi/comp-adjustment-file")[0] != '\0') {
255 std::string filename {xbt_cfg_get_string("smpi/comp-adjustment-file")};
256 std::ifstream fstream(filename);
257 if (!fstream.is_open()) {
258 xbt_die("Could not open file %s. Does it exist?", filename.c_str());
262 typedef boost::tokenizer< boost::escaped_list_separator<char>> Tokenizer;
263 std::getline(fstream, line); // Skip the header line
264 while (std::getline(fstream, line)) {
266 Tokenizer::iterator it = tok.begin();
267 Tokenizer::iterator end = std::next(tok.begin());
269 std::string location = *it;
270 boost::trim(location);
271 location2speedup.insert(std::pair<std::string, double>(location, std::stod(*end)));
276 // This map holds for each computation unit (such as "default" or "process1" etc.)
277 // the configuration as given by the user (counter data as a pair of (counter_name, counter_counter))
278 // and the (computed) event_set.
279 std::map</* computation unit name */ std::string, papi_process_data> units2papi_setup;
281 if (xbt_cfg_get_string("smpi/papi-events")[0] != '\0') {
282 if (PAPI_library_init(PAPI_VER_CURRENT) != PAPI_VER_CURRENT)
283 XBT_ERROR("Could not initialize PAPI library; is it correctly installed and linked?"
284 " Expected version is %i",
287 typedef boost::tokenizer<boost::char_separator<char>> Tokenizer;
288 boost::char_separator<char> separator_units(";");
289 std::string str = std::string(xbt_cfg_get_string("smpi/papi-events"));
290 Tokenizer tokens(str, separator_units);
292 // Iterate over all the computational units. This could be
293 // processes, hosts, threads, ranks... You name it. I'm not exactly
294 // sure what we will support eventually, so I'll leave it at the
295 // general term "units".
296 for (auto& unit_it : tokens) {
297 boost::char_separator<char> separator_events(":");
298 Tokenizer event_tokens(unit_it, separator_events);
300 int event_set = PAPI_NULL;
301 if (PAPI_create_eventset(&event_set) != PAPI_OK) {
302 // TODO: Should this let the whole simulation die?
303 XBT_CRITICAL("Could not create PAPI event set during init.");
306 // NOTE: We cannot use a map here, as we must obey the order of the counters
307 // This is important for PAPI: We need to map the values of counters back
308 // to the event_names (so, when PAPI_read() has finished)!
309 papi_counter_t counters2values;
311 // Iterate over all counters that were specified for this specific
313 // Note that we need to remove the name of the unit
314 // (that could also be the "default" value), which always comes first.
315 // Hence, we start at ++(events.begin())!
316 for (Tokenizer::iterator events_it = ++(event_tokens.begin()); events_it != event_tokens.end(); events_it++) {
318 int event_code = PAPI_NULL;
319 char* event_name = const_cast<char*>((*events_it).c_str());
320 if (PAPI_event_name_to_code(event_name, &event_code) == PAPI_OK) {
321 if (PAPI_add_event(event_set, event_code) != PAPI_OK) {
322 XBT_ERROR("Could not add PAPI event '%s'. Skipping.", event_name);
325 XBT_DEBUG("Successfully added PAPI event '%s' to the event set.", event_name);
328 XBT_CRITICAL("Could not find PAPI event '%s'. Skipping.", event_name);
332 counters2values.push_back(
333 // We cannot just pass *events_it, as this is of type const basic_string
334 std::make_pair<std::string, long long>(std::string(*events_it), 0));
337 std::string unit_name = *(event_tokens.begin());
338 papi_process_data config = {.counter_data = std::move(counters2values), .event_set = event_set};
340 units2papi_setup.insert(std::make_pair(unit_name, std::move(config)));
346 msg_bar_t finalization_barrier = nullptr;
347 if (process_count == 0){
348 process_count = SIMIX_process_count();
350 finalization_barrier = MSG_barrier_init(process_count);
352 smpi_universe_size = process_count;
353 process_data = new simgrid::smpi::Process*[process_count];
354 for (int i = 0; i < process_count; i++) {
355 process_data[i] = new simgrid::smpi::Process(i, finalization_barrier);
357 //if the process was launched through smpirun script we generate a global mpi_comm_world
358 //if not, we let MPI_COMM_NULL, and the comm world will be private to each mpi instance
360 group = new simgrid::smpi::Group(process_count);
361 MPI_COMM_WORLD = new simgrid::smpi::Comm(group, nullptr);
362 MPI_Attr_put(MPI_COMM_WORLD, MPI_UNIVERSE_SIZE, reinterpret_cast<void *>(process_count));
364 for (int i = 0; i < process_count; i++)
365 group->set_mapping(i, i);
369 void smpi_global_destroy()
371 int count = smpi_process_count();
373 smpi_bench_destroy();
374 smpi_shared_destroy();
375 if (MPI_COMM_WORLD != MPI_COMM_UNINITIALIZED){
376 delete MPI_COMM_WORLD->group();
377 MSG_barrier_destroy(process_data[0]->finalization_barrier());
379 smpi_deployment_cleanup_instances();
381 for (int i = 0; i < count; i++) {
382 if(process_data[i]->comm_self()!=MPI_COMM_NULL){
383 simgrid::smpi::Comm::destroy(process_data[i]->comm_self());
385 if(process_data[i]->comm_intra()!=MPI_COMM_NULL){
386 simgrid::smpi::Comm::destroy(process_data[i]->comm_intra());
388 xbt_os_timer_free(process_data[i]->timer());
389 xbt_mutex_destroy(process_data[i]->mailboxes_mutex());
390 delete process_data[i];
392 delete[] process_data;
393 process_data = nullptr;
395 if (MPI_COMM_WORLD != MPI_COMM_UNINITIALIZED){
396 MPI_COMM_WORLD->cleanup_smp();
397 MPI_COMM_WORLD->cleanup_attr<simgrid::smpi::Comm>();
398 if(simgrid::smpi::Colls::smpi_coll_cleanup_callback!=nullptr)
399 simgrid::smpi::Colls::smpi_coll_cleanup_callback();
400 delete MPI_COMM_WORLD;
403 MPI_COMM_WORLD = MPI_COMM_NULL;
405 if (!MC_is_active()) {
406 xbt_os_timer_free(global_timer);
409 xbt_free(index_to_process_data);
410 if(smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP)
411 smpi_destroy_global_memory_segments();
417 static void smpi_init_logs(){
419 /* Connect log categories. See xbt/log.c */
421 XBT_LOG_CONNECT(smpi); /* Keep this line as soon as possible in this function: xbt_log_appender_file.c depends on it
422 DO NOT connect this in XBT or so, or it will be useless to xbt_log_appender_file.c */
423 XBT_LOG_CONNECT(instr_smpi);
424 XBT_LOG_CONNECT(smpi_bench);
425 XBT_LOG_CONNECT(smpi_coll);
426 XBT_LOG_CONNECT(smpi_colls);
427 XBT_LOG_CONNECT(smpi_comm);
428 XBT_LOG_CONNECT(smpi_datatype);
429 XBT_LOG_CONNECT(smpi_dvfs);
430 XBT_LOG_CONNECT(smpi_group);
431 XBT_LOG_CONNECT(smpi_kernel);
432 XBT_LOG_CONNECT(smpi_mpi);
433 XBT_LOG_CONNECT(smpi_memory);
434 XBT_LOG_CONNECT(smpi_op);
435 XBT_LOG_CONNECT(smpi_pmpi);
436 XBT_LOG_CONNECT(smpi_request);
437 XBT_LOG_CONNECT(smpi_replay);
438 XBT_LOG_CONNECT(smpi_rma);
439 XBT_LOG_CONNECT(smpi_shared);
440 XBT_LOG_CONNECT(smpi_utils);
444 static void smpi_init_options(){
445 //return if already called
446 if (smpi_cpu_threshold > -1)
448 simgrid::smpi::Colls::set_collectives();
449 simgrid::smpi::Colls::smpi_coll_cleanup_callback=nullptr;
450 smpi_cpu_threshold = xbt_cfg_get_double("smpi/cpu-threshold");
451 smpi_host_speed = xbt_cfg_get_double("smpi/host-speed");
452 const char* smpi_privatize_option = xbt_cfg_get_string("smpi/privatization");
453 if (std::strcmp(smpi_privatize_option, "no") == 0)
454 smpi_privatize_global_variables = SMPI_PRIVATIZE_NONE;
455 else if (std::strcmp(smpi_privatize_option, "yes") == 0)
456 smpi_privatize_global_variables = SMPI_PRIVATIZE_DEFAULT;
457 else if (std::strcmp(smpi_privatize_option, "mmap") == 0)
458 smpi_privatize_global_variables = SMPI_PRIVATIZE_MMAP;
459 else if (std::strcmp(smpi_privatize_option, "dlopen") == 0)
460 smpi_privatize_global_variables = SMPI_PRIVATIZE_DLOPEN;
462 // Some compatibility stuff:
463 else if (std::strcmp(smpi_privatize_option, "1") == 0)
464 smpi_privatize_global_variables = SMPI_PRIVATIZE_DEFAULT;
465 else if (std::strcmp(smpi_privatize_option, "0") == 0)
466 smpi_privatize_global_variables = SMPI_PRIVATIZE_NONE;
469 xbt_die("Invalid value for smpi/privatization: '%s'", smpi_privatize_option);
471 if (smpi_cpu_threshold < 0)
472 smpi_cpu_threshold = DBL_MAX;
474 char* val = xbt_cfg_get_string("smpi/shared-malloc");
475 if (!strcasecmp(val, "yes") || !strcmp(val, "1") || !strcasecmp(val, "on") || !strcasecmp(val, "global")) {
476 smpi_cfg_shared_malloc = shmalloc_global;
477 } else if (!strcasecmp(val, "local")) {
478 smpi_cfg_shared_malloc = shmalloc_local;
479 } else if (!strcasecmp(val, "no") || !strcmp(val, "0") || !strcasecmp(val, "off")) {
480 smpi_cfg_shared_malloc = shmalloc_none;
482 xbt_die("Invalid value '%s' for option smpi/shared-malloc. Possible values: 'on' or 'global', 'local', 'off'",
487 typedef std::function<int(int argc, char *argv[])> smpi_entry_point_type;
488 typedef int (* smpi_c_entry_point_type)(int argc, char **argv);
489 typedef void (*smpi_fortran_entry_point_type)();
491 static int smpi_run_entry_point(smpi_entry_point_type entry_point, std::vector<std::string> args)
493 const int argc = args.size();
494 std::unique_ptr<char*[]> argv(new char*[argc + 1]);
495 for (int i = 0; i != argc; ++i)
496 argv[i] = args[i].empty() ? const_cast<char*>(""): &args[i].front();
497 argv[argc] = nullptr;
499 int res = entry_point(argc, argv.get());
501 XBT_WARN("SMPI process did not return 0. Return value : %d", res);
502 smpi_process()->set_return_value(res);
507 // TODO, remove the number of functions involved here
508 static smpi_entry_point_type smpi_resolve_function(void* handle)
510 smpi_fortran_entry_point_type entry_point_fortran = (smpi_fortran_entry_point_type)dlsym(handle, "user_main_");
511 if (entry_point_fortran != nullptr) {
512 return [entry_point_fortran](int argc, char** argv) {
513 smpi_process_init(&argc, &argv);
514 entry_point_fortran();
519 smpi_c_entry_point_type entry_point = (smpi_c_entry_point_type)dlsym(handle, "main");
520 if (entry_point != nullptr) {
524 return smpi_entry_point_type();
527 int smpi_main(const char* executable, int argc, char *argv[])
529 srand(SMPI_RAND_SEED);
531 if (getenv("SMPI_PRETEND_CC") != nullptr) {
532 /* Hack to ensure that smpicc can pretend to be a simple compiler. Particularly handy to pass it to the
533 * configuration tools */
537 TRACE_global_init(&argc, argv);
539 SIMIX_global_init(&argc, argv);
540 MSG_init(&argc,argv);
542 SMPI_switch_data_segment = &smpi_switch_data_segment;
544 simgrid::s4u::Host::onCreation.connect([](simgrid::s4u::Host& host) {
545 host.extension_set(new simgrid::smpi::SmpiHost(&host));
548 // parse the platform file: get the host list
549 SIMIX_create_environment(argv[1]);
550 SIMIX_comm_set_copy_data_callback(smpi_comm_copy_buffer_callback);
552 static std::size_t rank = 0;
556 if (smpi_privatize_global_variables == SMPI_PRIVATIZE_DLOPEN) {
558 std::string executable_copy = executable;
560 // Prepare the copy of the binary (get its size)
561 struct stat fdin_stat;
562 stat(executable_copy.c_str(), &fdin_stat);
563 off_t fdin_size = fdin_stat.st_size;
565 simix_global->default_function = [executable_copy, fdin_size](std::vector<std::string> args) {
566 return std::function<void()>([executable_copy, fdin_size, args] {
568 // Copy the dynamic library:
569 std::string target_executable = executable_copy
570 + "_" + std::to_string(getpid())
571 + "_" + std::to_string(rank++) + ".so";
573 int fdin = open(executable_copy.c_str(), O_RDONLY);
574 xbt_assert(fdin >= 0, "Cannot read from %s", executable_copy.c_str());
575 int fdout = open(target_executable.c_str(), O_CREAT | O_RDWR, S_IRWXU);
576 xbt_assert(fdout >= 0, "Cannot write into %s", target_executable.c_str());
579 ssize_t sent_size = sendfile(fdout, fdin, NULL, fdin_size);
580 xbt_assert(sent_size == fdin_size,
581 "Error while copying %s: only %zd bytes copied instead of %ld (errno: %d -- %s)",
582 target_executable.c_str(), sent_size, fdin_size, errno, strerror(errno));
584 XBT_VERB("Copy %d bytes into %s", static_cast<int>(fdin_size), target_executable.c_str());
585 const int bufsize = 1024 * 1024 * 4;
587 while (int got = read(fdin, buf, bufsize)) {
589 xbt_assert(errno == EINTR, "Cannot read from %s", executable_copy.c_str());
593 while (int done = write(fdout, p, todo)) {
595 xbt_assert(errno == EINTR, "Cannot write into %s", target_executable.c_str());
607 // Load the copy and resolve the entry point:
608 void* handle = dlopen(target_executable.c_str(), RTLD_LAZY | RTLD_LOCAL | RTLD_DEEPBIND);
609 if (xbt_cfg_get_boolean("smpi/keep-temps") == false)
610 unlink(target_executable.c_str());
611 if (handle == nullptr)
612 xbt_die("dlopen failed: %s (errno: %d -- %s)", dlerror(), errno, strerror(errno));
613 smpi_entry_point_type entry_point = smpi_resolve_function(handle);
615 xbt_die("Could not resolve entry point");
617 smpi_run_entry_point(entry_point, args);
624 // Load the dynamic library and resolve the entry point:
625 void* handle = dlopen(executable, RTLD_LAZY | RTLD_LOCAL | RTLD_DEEPBIND);
626 if (handle == nullptr)
627 xbt_die("dlopen failed for %s: %s (errno: %d -- %s)", executable, dlerror(), errno, strerror(errno));
628 smpi_entry_point_type entry_point = smpi_resolve_function(handle);
630 xbt_die("main not found in %s", executable);
631 // TODO, register the executable for SMPI privatization
633 // Execute the same entry point for each simulated process:
634 simix_global->default_function = [entry_point](std::vector<std::string> args) {
635 return std::function<void()>([entry_point, args] {
636 smpi_run_entry_point(entry_point, args);
642 SIMIX_launch_application(argv[2]);
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 // Called either directly from the user code, or from the code called by smpirun
689 smpi_check_options();
691 simgrid::surf::surfExitCallbacks.connect(TRACE_smpi_release);
692 if(smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP)
693 smpi_initialize_global_memory_segments();
696 void SMPI_finalize(){
697 smpi_global_destroy();
700 void smpi_mpi_init() {
701 if(smpi_init_sleep > 0)
702 simcall_process_sleep(smpi_init_sleep);
705 double smpi_mpi_wtime(){
707 if (smpi_process()->initialized() != 0 && smpi_process()->finalized() == 0 && smpi_process()->sampling() == 0) {
709 time = SIMIX_get_clock();
710 // to avoid deadlocks if used as a break condition, such as
711 // while (MPI_Wtime(...) < time_limit) {
714 // because the time will not normally advance when only calls to MPI_Wtime
715 // are made -> deadlock (MPI_Wtime never reaches the time limit)
716 if(smpi_wtime_sleep > 0)
717 simcall_process_sleep(smpi_wtime_sleep);
720 time = SIMIX_get_clock();