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>
14 #include "simgrid/s4u/Mailbox.hpp"
15 #include "smpi/smpi_shared_malloc.hpp"
16 #include "simgrid/sg_config.h"
17 #include "src/kernel/activity/SynchroComm.hpp"
18 #include "src/mc/mc_record.h"
19 #include "src/mc/mc_replay.h"
20 #include "src/msg/msg_private.h"
21 #include "src/simix/smx_private.h"
22 #include "src/surf/surf_interface.hpp"
23 #include "src/smpi/SmpiHost.hpp"
24 #include "surf/surf.h"
25 #include "xbt/replay.hpp"
26 #include <xbt/config.hpp>
27 #include "src/smpi/smpi_process.hpp"
28 #include "src/smpi/smpi_coll.hpp"
29 #include "src/smpi/smpi_info.hpp"
31 #include <float.h> /* DBL_MAX */
43 #include <sys/sendfile.h>
46 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_kernel, smpi, "Logging specific to SMPI (kernel)");
47 #include <boost/tokenizer.hpp>
48 #include <boost/algorithm/string.hpp> /* trim_right / trim_left */
51 /* RTLD_DEEPBIND is a bad idea of GNU ld that obviously does not exist on other platforms
52 * See https://www.akkadia.org/drepper/dsohowto.pdf
53 * and https://lists.freebsd.org/pipermail/freebsd-current/2016-March/060284.html
55 #define RTLD_DEEPBIND 0
58 /* Mac OSX does not have any header file providing that definition so we have to duplicate it here. Bummers. */
59 extern char** environ; /* we use it in posix_spawnp below */
63 const char* papi_default_config_name = "default";
65 struct papi_process_data {
66 papi_counter_t counter_data;
71 std::unordered_map<std::string, double> location2speedup;
73 simgrid::smpi::Process **process_data = nullptr;
74 int process_count = 0;
75 int smpi_universe_size = 0;
76 int* index_to_process_data = nullptr;
77 extern double smpi_total_benched_time;
78 xbt_os_timer_t global_timer;
79 MPI_Comm MPI_COMM_WORLD = MPI_COMM_UNINITIALIZED;
80 MPI_Errhandler *MPI_ERRORS_RETURN = nullptr;
81 MPI_Errhandler *MPI_ERRORS_ARE_FATAL = nullptr;
82 MPI_Errhandler *MPI_ERRHANDLER_NULL = nullptr;
83 static simgrid::config::Flag<double> smpi_wtime_sleep(
84 "smpi/wtime", "Minimum time to inject inside a call to MPI_Wtime", 0.0);
85 static simgrid::config::Flag<double> smpi_init_sleep(
86 "smpi/init", "Time to inject inside a call to MPI_Init", 0.0);
88 void (*smpi_comm_copy_data_callback) (smx_activity_t, void*, size_t) = &smpi_comm_copy_buffer_callback;
92 int smpi_process_count()
97 simgrid::smpi::Process* smpi_process()
99 smx_actor_t me = SIMIX_process_self();
100 if (me == nullptr) // This happens sometimes (eg, when linking against NS3 because it pulls openMPI...)
102 simgrid::MsgActorExt* msgExt = static_cast<simgrid::MsgActorExt*>(me->data);
103 return static_cast<simgrid::smpi::Process*>(msgExt->data);
106 simgrid::smpi::Process* smpi_process_remote(int index)
108 return process_data[index_to_process_data[index]];
111 MPI_Comm smpi_process_comm_self(){
112 return smpi_process()->comm_self();
115 void smpi_process_init(int *argc, char ***argv){
116 simgrid::smpi::Process::init(argc, argv);
119 int smpi_process_index(){
120 return smpi_process()->index();
123 void * smpi_process_get_user_data(){
124 return smpi_process()->get_user_data();
127 void smpi_process_set_user_data(void *data){
128 return smpi_process()->set_user_data(data);
132 int smpi_global_size()
134 char *value = getenv("SMPI_GLOBAL_SIZE");
135 xbt_assert(value,"Please set env var SMPI_GLOBAL_SIZE to the expected number of processes.");
137 return xbt_str_parse_int(value, "SMPI_GLOBAL_SIZE contains a non-numerical value: %s");
140 void smpi_comm_set_copy_data_callback(void (*callback) (smx_activity_t, void*, size_t))
142 smpi_comm_copy_data_callback = callback;
145 static void print(std::vector<std::pair<size_t, size_t>> vec) {
146 std::fprintf(stderr, "{");
147 for (auto elt : vec) {
148 std::fprintf(stderr, "(0x%zx, 0x%zx),", elt.first, elt.second);
150 std::fprintf(stderr, "}\n");
152 static void memcpy_private(void* dest, const void* src, std::vector<std::pair<size_t, size_t>>& private_blocks)
154 for(auto block : private_blocks) {
155 memcpy((uint8_t*)dest+block.first, (uint8_t*)src+block.first, block.second-block.first);
159 static void check_blocks(std::vector<std::pair<size_t, size_t>> &private_blocks, size_t buff_size) {
160 for(auto block : private_blocks) {
161 xbt_assert(block.first <= block.second && block.second <= buff_size, "Oops, bug in shared malloc.");
165 void smpi_comm_copy_buffer_callback(smx_activity_t synchro, void *buff, size_t buff_size)
167 simgrid::kernel::activity::Comm *comm = dynamic_cast<simgrid::kernel::activity::Comm*>(synchro);
170 size_t src_offset = 0;
171 size_t dst_offset = 0;
172 std::vector<std::pair<size_t, size_t>> src_private_blocks;
173 std::vector<std::pair<size_t, size_t>> dst_private_blocks;
174 XBT_DEBUG("Copy the data over");
175 if((src_shared=smpi_is_shared(buff, src_private_blocks, &src_offset))) {
176 XBT_DEBUG("Sender %p is shared. Let's ignore it.", buff);
177 src_private_blocks = shift_and_frame_private_blocks(src_private_blocks, src_offset, buff_size);
180 src_private_blocks.clear();
181 src_private_blocks.push_back(std::make_pair(0, buff_size));
183 if((dst_shared=smpi_is_shared((char*)comm->dst_buff, dst_private_blocks, &dst_offset))) {
184 XBT_DEBUG("Receiver %p is shared. Let's ignore it.", (char*)comm->dst_buff);
185 dst_private_blocks = shift_and_frame_private_blocks(dst_private_blocks, dst_offset, buff_size);
188 dst_private_blocks.clear();
189 dst_private_blocks.push_back(std::make_pair(0, buff_size));
191 check_blocks(src_private_blocks, buff_size);
192 check_blocks(dst_private_blocks, buff_size);
193 auto private_blocks = merge_private_blocks(src_private_blocks, dst_private_blocks);
194 check_blocks(private_blocks, buff_size);
196 if((smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP) && (static_cast<char*>(buff) >= smpi_start_data_exe)
197 && (static_cast<char*>(buff) < smpi_start_data_exe + smpi_size_data_exe )
199 XBT_DEBUG("Privatization : We are copying from a zone inside global memory... Saving data to temp buffer !");
201 smpi_switch_data_segment(
202 (static_cast<simgrid::smpi::Process*>((static_cast<simgrid::MsgActorExt*>(comm->src_proc->data)->data))->index()));
203 tmpbuff = static_cast<void*>(xbt_malloc(buff_size));
204 memcpy_private(tmpbuff, buff, private_blocks);
207 if((smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP) && ((char*)comm->dst_buff >= smpi_start_data_exe)
208 && ((char*)comm->dst_buff < smpi_start_data_exe + smpi_size_data_exe )){
209 XBT_DEBUG("Privatization : We are copying to a zone inside global memory - Switch data segment");
210 smpi_switch_data_segment(
211 (static_cast<simgrid::smpi::Process*>((static_cast<simgrid::MsgActorExt*>(comm->dst_proc->data)->data))->index()));
213 XBT_DEBUG("Copying %zu bytes from %p to %p", buff_size, tmpbuff,comm->dst_buff);
214 memcpy_private(comm->dst_buff, tmpbuff, private_blocks);
216 if (comm->detached) {
217 // if this is a detached send, the source buffer was duplicated by SMPI
218 // sender to make the original buffer available to the application ASAP
220 //It seems that the request is used after the call there this should be free somewhere else but where???
221 //xbt_free(comm->comm.src_data);// inside SMPI the request is kept inside the user data and should be free
222 comm->src_buff = nullptr;
224 if(tmpbuff!=buff)xbt_free(tmpbuff);
228 void smpi_comm_null_copy_buffer_callback(smx_activity_t comm, void *buff, size_t buff_size)
230 /* nothing done in this version */
233 static void smpi_check_options(){
234 //check correctness of MPI parameters
236 xbt_assert(xbt_cfg_get_int("smpi/async-small-thresh") <= xbt_cfg_get_int("smpi/send-is-detached-thresh"));
238 if (xbt_cfg_is_default_value("smpi/host-speed")) {
239 XBT_INFO("You did not set the power of the host running the simulation. "
240 "The timings will certainly not be accurate. "
241 "Use the option \"--cfg=smpi/host-speed:<flops>\" to set its value."
242 "Check http://simgrid.org/simgrid/latest/doc/options.html#options_smpi_bench for more information.");
245 xbt_assert(xbt_cfg_get_double("smpi/cpu-threshold") >=0,
246 "The 'smpi/cpu-threshold' option cannot have negative values [anymore]. If you want to discard "
247 "the simulation of any computation, please use 'smpi/simulate-computation:no' instead.");
251 return process_data != nullptr;
254 void smpi_global_init()
258 if (!MC_is_active()) {
259 global_timer = xbt_os_timer_new();
260 xbt_os_walltimer_start(global_timer);
263 if (xbt_cfg_get_string("smpi/comp-adjustment-file")[0] != '\0') {
264 std::string filename {xbt_cfg_get_string("smpi/comp-adjustment-file")};
265 std::ifstream fstream(filename);
266 if (!fstream.is_open()) {
267 xbt_die("Could not open file %s. Does it exist?", filename.c_str());
271 typedef boost::tokenizer< boost::escaped_list_separator<char>> Tokenizer;
272 std::getline(fstream, line); // Skip the header line
273 while (std::getline(fstream, line)) {
275 Tokenizer::iterator it = tok.begin();
276 Tokenizer::iterator end = std::next(tok.begin());
278 std::string location = *it;
279 boost::trim(location);
280 location2speedup.insert(std::pair<std::string, double>(location, std::stod(*end)));
285 // This map holds for each computation unit (such as "default" or "process1" etc.)
286 // the configuration as given by the user (counter data as a pair of (counter_name, counter_counter))
287 // and the (computed) event_set.
288 std::map</* computation unit name */ std::string, papi_process_data> units2papi_setup;
290 if (xbt_cfg_get_string("smpi/papi-events")[0] != '\0') {
291 if (PAPI_library_init(PAPI_VER_CURRENT) != PAPI_VER_CURRENT)
292 XBT_ERROR("Could not initialize PAPI library; is it correctly installed and linked?"
293 " Expected version is %i",
296 typedef boost::tokenizer<boost::char_separator<char>> Tokenizer;
297 boost::char_separator<char> separator_units(";");
298 std::string str = std::string(xbt_cfg_get_string("smpi/papi-events"));
299 Tokenizer tokens(str, separator_units);
301 // Iterate over all the computational units. This could be
302 // processes, hosts, threads, ranks... You name it. I'm not exactly
303 // sure what we will support eventually, so I'll leave it at the
304 // general term "units".
305 for (auto& unit_it : tokens) {
306 boost::char_separator<char> separator_events(":");
307 Tokenizer event_tokens(unit_it, separator_events);
309 int event_set = PAPI_NULL;
310 if (PAPI_create_eventset(&event_set) != PAPI_OK) {
311 // TODO: Should this let the whole simulation die?
312 XBT_CRITICAL("Could not create PAPI event set during init.");
315 // NOTE: We cannot use a map here, as we must obey the order of the counters
316 // This is important for PAPI: We need to map the values of counters back
317 // to the event_names (so, when PAPI_read() has finished)!
318 papi_counter_t counters2values;
320 // Iterate over all counters that were specified for this specific
322 // Note that we need to remove the name of the unit
323 // (that could also be the "default" value), which always comes first.
324 // Hence, we start at ++(events.begin())!
325 for (Tokenizer::iterator events_it = ++(event_tokens.begin()); events_it != event_tokens.end(); events_it++) {
327 int event_code = PAPI_NULL;
328 char* event_name = const_cast<char*>((*events_it).c_str());
329 if (PAPI_event_name_to_code(event_name, &event_code) == PAPI_OK) {
330 if (PAPI_add_event(event_set, event_code) != PAPI_OK) {
331 XBT_ERROR("Could not add PAPI event '%s'. Skipping.", event_name);
334 XBT_DEBUG("Successfully added PAPI event '%s' to the event set.", event_name);
337 XBT_CRITICAL("Could not find PAPI event '%s'. Skipping.", event_name);
341 counters2values.push_back(
342 // We cannot just pass *events_it, as this is of type const basic_string
343 std::make_pair<std::string, long long>(std::string(*events_it), 0));
346 std::string unit_name = *(event_tokens.begin());
347 papi_process_data config = {.counter_data = std::move(counters2values), .event_set = event_set};
349 units2papi_setup.insert(std::make_pair(unit_name, std::move(config)));
355 msg_bar_t finalization_barrier = nullptr;
356 if (process_count == 0){
357 process_count = SIMIX_process_count();
359 finalization_barrier = MSG_barrier_init(process_count);
361 smpi_universe_size = process_count;
362 process_data = new simgrid::smpi::Process*[process_count];
363 for (int i = 0; i < process_count; i++) {
364 process_data[i] = new simgrid::smpi::Process(i, finalization_barrier);
366 //if the process was launched through smpirun script we generate a global mpi_comm_world
367 //if not, we let MPI_COMM_NULL, and the comm world will be private to each mpi instance
369 group = new simgrid::smpi::Group(process_count);
370 MPI_COMM_WORLD = new simgrid::smpi::Comm(group, nullptr);
371 MPI_Attr_put(MPI_COMM_WORLD, MPI_UNIVERSE_SIZE, reinterpret_cast<void *>(process_count));
373 for (int i = 0; i < process_count; i++)
374 group->set_mapping(i, i);
378 void smpi_global_destroy()
380 int count = smpi_process_count();
382 smpi_bench_destroy();
383 smpi_shared_destroy();
384 if (MPI_COMM_WORLD != MPI_COMM_UNINITIALIZED){
385 delete MPI_COMM_WORLD->group();
386 MSG_barrier_destroy(process_data[0]->finalization_barrier());
388 smpi_deployment_cleanup_instances();
390 for (int i = 0; i < count; i++) {
391 if(process_data[i]->comm_self()!=MPI_COMM_NULL){
392 simgrid::smpi::Comm::destroy(process_data[i]->comm_self());
394 if(process_data[i]->comm_intra()!=MPI_COMM_NULL){
395 simgrid::smpi::Comm::destroy(process_data[i]->comm_intra());
397 xbt_os_timer_free(process_data[i]->timer());
398 xbt_mutex_destroy(process_data[i]->mailboxes_mutex());
399 delete process_data[i];
401 delete[] process_data;
402 process_data = nullptr;
404 if (MPI_COMM_WORLD != MPI_COMM_UNINITIALIZED){
405 MPI_COMM_WORLD->cleanup_smp();
406 MPI_COMM_WORLD->cleanup_attr<simgrid::smpi::Comm>();
407 if(simgrid::smpi::Colls::smpi_coll_cleanup_callback!=nullptr)
408 simgrid::smpi::Colls::smpi_coll_cleanup_callback();
409 delete MPI_COMM_WORLD;
412 MPI_COMM_WORLD = MPI_COMM_NULL;
414 if (!MC_is_active()) {
415 xbt_os_timer_free(global_timer);
418 xbt_free(index_to_process_data);
419 if(smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP)
420 smpi_destroy_global_memory_segments();
426 static void smpi_init_logs(){
428 /* Connect log categories. See xbt/log.c */
430 XBT_LOG_CONNECT(smpi); /* Keep this line as soon as possible in this function: xbt_log_appender_file.c depends on it
431 DO NOT connect this in XBT or so, or it will be useless to xbt_log_appender_file.c */
432 XBT_LOG_CONNECT(instr_smpi);
433 XBT_LOG_CONNECT(smpi_bench);
434 XBT_LOG_CONNECT(smpi_coll);
435 XBT_LOG_CONNECT(smpi_colls);
436 XBT_LOG_CONNECT(smpi_comm);
437 XBT_LOG_CONNECT(smpi_datatype);
438 XBT_LOG_CONNECT(smpi_dvfs);
439 XBT_LOG_CONNECT(smpi_group);
440 XBT_LOG_CONNECT(smpi_kernel);
441 XBT_LOG_CONNECT(smpi_mpi);
442 XBT_LOG_CONNECT(smpi_memory);
443 XBT_LOG_CONNECT(smpi_op);
444 XBT_LOG_CONNECT(smpi_pmpi);
445 XBT_LOG_CONNECT(smpi_request);
446 XBT_LOG_CONNECT(smpi_replay);
447 XBT_LOG_CONNECT(smpi_rma);
448 XBT_LOG_CONNECT(smpi_shared);
449 XBT_LOG_CONNECT(smpi_utils);
453 static void smpi_init_options(){
454 //return if already called
455 if (smpi_cpu_threshold > -1)
457 simgrid::smpi::Colls::set_collectives();
458 simgrid::smpi::Colls::smpi_coll_cleanup_callback=nullptr;
459 smpi_cpu_threshold = xbt_cfg_get_double("smpi/cpu-threshold");
460 smpi_host_speed = xbt_cfg_get_double("smpi/host-speed");
461 const char* smpi_privatize_option = xbt_cfg_get_string("smpi/privatization");
462 if (std::strcmp(smpi_privatize_option, "no") == 0)
463 smpi_privatize_global_variables = SMPI_PRIVATIZE_NONE;
464 else if (std::strcmp(smpi_privatize_option, "yes") == 0)
465 smpi_privatize_global_variables = SMPI_PRIVATIZE_DEFAULT;
466 else if (std::strcmp(smpi_privatize_option, "mmap") == 0)
467 smpi_privatize_global_variables = SMPI_PRIVATIZE_MMAP;
468 else if (std::strcmp(smpi_privatize_option, "dlopen") == 0)
469 smpi_privatize_global_variables = SMPI_PRIVATIZE_DLOPEN;
471 // Some compatibility stuff:
472 else if (std::strcmp(smpi_privatize_option, "1") == 0)
473 smpi_privatize_global_variables = SMPI_PRIVATIZE_DEFAULT;
474 else if (std::strcmp(smpi_privatize_option, "0") == 0)
475 smpi_privatize_global_variables = SMPI_PRIVATIZE_NONE;
478 xbt_die("Invalid value for smpi/privatization: '%s'", smpi_privatize_option);
480 #if defined(__FreeBSD__)
481 if (smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP) {
482 XBT_INFO("Mixing mmap privatization is broken on FreeBSD, switching to dlopen privatization instead.");
483 smpi_privatize_global_variables = SMPI_PRIVATIZE_DLOPEN;
487 if (smpi_cpu_threshold < 0)
488 smpi_cpu_threshold = DBL_MAX;
490 char* val = xbt_cfg_get_string("smpi/shared-malloc");
491 if (!strcasecmp(val, "yes") || !strcmp(val, "1") || !strcasecmp(val, "on") || !strcasecmp(val, "global")) {
492 smpi_cfg_shared_malloc = shmalloc_global;
493 } else if (!strcasecmp(val, "local")) {
494 smpi_cfg_shared_malloc = shmalloc_local;
495 } else if (!strcasecmp(val, "no") || !strcmp(val, "0") || !strcasecmp(val, "off")) {
496 smpi_cfg_shared_malloc = shmalloc_none;
498 xbt_die("Invalid value '%s' for option smpi/shared-malloc. Possible values: 'on' or 'global', 'local', 'off'",
503 typedef std::function<int(int argc, char *argv[])> smpi_entry_point_type;
504 typedef int (* smpi_c_entry_point_type)(int argc, char **argv);
505 typedef void (*smpi_fortran_entry_point_type)();
507 static int smpi_run_entry_point(smpi_entry_point_type entry_point, std::vector<std::string> args)
509 const int argc = args.size();
510 std::unique_ptr<char*[]> argv(new char*[argc + 1]);
511 for (int i = 0; i != argc; ++i)
512 argv[i] = args[i].empty() ? const_cast<char*>(""): &args[i].front();
513 argv[argc] = nullptr;
515 int res = entry_point(argc, argv.get());
517 XBT_WARN("SMPI process did not return 0. Return value : %d", res);
518 smpi_process()->set_return_value(res);
523 // TODO, remove the number of functions involved here
524 static smpi_entry_point_type smpi_resolve_function(void* handle)
526 smpi_fortran_entry_point_type entry_point_fortran = (smpi_fortran_entry_point_type)dlsym(handle, "user_main_");
527 if (entry_point_fortran != nullptr) {
528 return [entry_point_fortran](int argc, char** argv) {
529 smpi_process_init(&argc, &argv);
530 entry_point_fortran();
535 smpi_c_entry_point_type entry_point = (smpi_c_entry_point_type)dlsym(handle, "main");
536 if (entry_point != nullptr) {
540 return smpi_entry_point_type();
543 int smpi_main(const char* executable, int argc, char *argv[])
545 srand(SMPI_RAND_SEED);
547 if (getenv("SMPI_PRETEND_CC") != nullptr) {
548 /* Hack to ensure that smpicc can pretend to be a simple compiler. Particularly handy to pass it to the
549 * configuration tools */
553 TRACE_global_init(&argc, argv);
555 SIMIX_global_init(&argc, argv);
556 MSG_init(&argc,argv);
558 SMPI_switch_data_segment = &smpi_switch_data_segment;
560 simgrid::s4u::Host::onCreation.connect([](simgrid::s4u::Host& host) {
561 host.extension_set(new simgrid::smpi::SmpiHost(&host));
564 // parse the platform file: get the host list
565 SIMIX_create_environment(argv[1]);
566 SIMIX_comm_set_copy_data_callback(smpi_comm_copy_buffer_callback);
568 static std::size_t rank = 0;
572 if (smpi_privatize_global_variables == SMPI_PRIVATIZE_DLOPEN) {
574 std::string executable_copy = executable;
576 // Prepare the copy of the binary (get its size)
577 struct stat fdin_stat;
578 stat(executable_copy.c_str(), &fdin_stat);
579 off_t fdin_size = fdin_stat.st_size;
581 simix_global->default_function = [executable_copy, fdin_size](std::vector<std::string> args) {
582 return std::function<void()>([executable_copy, fdin_size, args] {
584 // Copy the dynamic library:
585 std::string target_executable = executable_copy
586 + "_" + std::to_string(getpid())
587 + "_" + std::to_string(rank++) + ".so";
589 int fdin = open(executable_copy.c_str(), O_RDONLY);
590 xbt_assert(fdin >= 0, "Cannot read from %s", executable_copy.c_str());
591 int fdout = open(target_executable.c_str(), O_CREAT | O_RDWR, S_IRWXU);
592 xbt_assert(fdout >= 0, "Cannot write into %s", target_executable.c_str());
595 ssize_t sent_size = sendfile(fdout, fdin, NULL, fdin_size);
596 xbt_assert(sent_size == fdin_size,
597 "Error while copying %s: only %zd bytes copied instead of %ld (errno: %d -- %s)",
598 target_executable.c_str(), sent_size, fdin_size, errno, strerror(errno));
600 XBT_VERB("Copy %d bytes into %s", static_cast<int>(fdin_size), target_executable.c_str());
601 const int bufsize = 1024 * 1024 * 4;
603 while (int got = read(fdin, buf, bufsize)) {
605 xbt_assert(errno == EINTR, "Cannot read from %s", executable_copy.c_str());
609 while (int done = write(fdout, p, todo)) {
611 xbt_assert(errno == EINTR, "Cannot write into %s", target_executable.c_str());
623 // Load the copy and resolve the entry point:
624 void* handle = dlopen(target_executable.c_str(), RTLD_LAZY | RTLD_LOCAL | RTLD_DEEPBIND);
625 if (xbt_cfg_get_boolean("smpi/keep-temps") == false)
626 unlink(target_executable.c_str());
627 if (handle == nullptr)
628 xbt_die("dlopen failed: %s (errno: %d -- %s)", dlerror(), errno, strerror(errno));
629 smpi_entry_point_type entry_point = smpi_resolve_function(handle);
631 xbt_die("Could not resolve entry point");
633 smpi_run_entry_point(entry_point, args);
640 // Load the dynamic library and resolve the entry point:
641 void* handle = dlopen(executable, RTLD_LAZY | RTLD_LOCAL | RTLD_DEEPBIND);
642 if (handle == nullptr)
643 xbt_die("dlopen failed for %s: %s (errno: %d -- %s)", executable, dlerror(), errno, strerror(errno));
644 smpi_entry_point_type entry_point = smpi_resolve_function(handle);
646 xbt_die("main not found in %s", executable);
647 // TODO, register the executable for SMPI privatization
649 // Execute the same entry point for each simulated process:
650 simix_global->default_function = [entry_point](std::vector<std::string> args) {
651 return std::function<void()>([entry_point, args] {
652 smpi_run_entry_point(entry_point, args);
658 SIMIX_launch_application(argv[2]);
662 /* Clean IO before the run */
666 if (MC_is_active()) {
672 xbt_os_walltimer_stop(global_timer);
673 if (xbt_cfg_get_boolean("smpi/display-timing")){
674 double global_time = xbt_os_timer_elapsed(global_timer);
675 XBT_INFO("Simulated time: %g seconds. \n\n"
676 "The simulation took %g seconds (after parsing and platform setup)\n"
677 "%g seconds were actual computation of the application",
678 SIMIX_get_clock(), global_time , smpi_total_benched_time);
680 if (smpi_total_benched_time/global_time>=0.75)
681 XBT_INFO("More than 75%% of the time was spent inside the application code.\n"
682 "You may want to use sampling functions or trace replay to reduce this.");
685 int count = smpi_process_count();
687 for (i = 0; i < count; i++) {
688 if(process_data[i]->return_value()!=0){
689 ret=process_data[i]->return_value();//return first non 0 value
693 smpi_global_destroy();
700 // Called either directly from the user code, or from the code called by smpirun
705 smpi_check_options();
707 simgrid::surf::surfExitCallbacks.connect(TRACE_smpi_release);
708 if(smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP)
709 smpi_initialize_global_memory_segments();
712 void SMPI_finalize(){
713 smpi_global_destroy();
716 void smpi_mpi_init() {
717 if(smpi_init_sleep > 0)
718 simcall_process_sleep(smpi_init_sleep);
721 double smpi_mpi_wtime(){
723 if (smpi_process()->initialized() != 0 && smpi_process()->finalized() == 0 && smpi_process()->sampling() == 0) {
725 time = SIMIX_get_clock();
726 // to avoid deadlocks if used as a break condition, such as
727 // while (MPI_Wtime(...) < time_limit) {
730 // because the time will not normally advance when only calls to MPI_Wtime
731 // are made -> deadlock (MPI_Wtime never reaches the time limit)
732 if(smpi_wtime_sleep > 0)
733 simcall_process_sleep(smpi_wtime_sleep);
736 time = SIMIX_get_clock();