1 /* Copyright (c) 2007-2018. 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. */
6 #include "smpi_host.hpp"
8 #include "simgrid/s4u/Engine.hpp"
9 #include "smpi_coll.hpp"
10 #include "smpi_process.hpp"
11 #include "src/msg/msg_private.hpp"
12 #include "src/simix/smx_private.hpp"
13 #include "xbt/config.hpp"
15 #include <cfloat> /* DBL_MAX */
18 #if not defined(__APPLE__)
24 #include <sys/sendfile.h>
27 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_kernel, smpi, "Logging specific to SMPI (kernel)");
28 #include <boost/tokenizer.hpp>
29 #include <boost/algorithm/string.hpp> /* trim_right / trim_left */
32 /* RTLD_DEEPBIND is a bad idea of GNU ld that obviously does not exist on other platforms
33 * See https://www.akkadia.org/drepper/dsohowto.pdf
34 * and https://lists.freebsd.org/pipermail/freebsd-current/2016-March/060284.html
36 #define RTLD_DEEPBIND 0
41 const char* papi_default_config_name = "default";
43 struct papi_process_data {
44 papi_counter_t counter_data;
49 using simgrid::s4u::Actor;
50 using simgrid::s4u::ActorPtr;
51 std::unordered_map<std::string, double> location2speedup;
53 static std::map</*process_id*/ ActorPtr, simgrid::smpi::Process*> process_data;
54 int process_count = 0;
55 static int smpi_exit_status = 0;
56 int smpi_universe_size = 0;
57 extern double smpi_total_benched_time;
58 xbt_os_timer_t global_timer;
59 static std::vector<std::string> privatize_libs_paths;
61 * Setting MPI_COMM_WORLD to MPI_COMM_UNINITIALIZED (it's a variable)
62 * is important because the implementation of MPI_Comm checks
63 * "this == MPI_COMM_UNINITIALIZED"? If yes, it uses smpi_process()->comm_world()
65 * This is basically how we only have one global variable but all processes have
66 * different communicators (the one their SMPI instance uses).
68 * See smpi_comm.cpp and the functions therein for details.
70 MPI_Comm MPI_COMM_WORLD = MPI_COMM_UNINITIALIZED;
71 MPI_Errhandler *MPI_ERRORS_RETURN = nullptr;
72 MPI_Errhandler *MPI_ERRORS_ARE_FATAL = nullptr;
73 MPI_Errhandler *MPI_ERRHANDLER_NULL = nullptr;
74 // No instance gets manually created; check also the smpirun.in script as
75 // this default name is used there as well (when the <actor> tag is generated).
76 static const std::string smpi_default_instance_name("smpirun");
77 static simgrid::config::Flag<double> smpi_wtime_sleep(
78 "smpi/wtime", "Minimum time to inject inside a call to MPI_Wtime", 0.0);
79 static simgrid::config::Flag<double> smpi_init_sleep(
80 "smpi/init", "Time to inject inside a call to MPI_Init", 0.0);
82 void (*smpi_comm_copy_data_callback) (smx_activity_t, void*, size_t) = &smpi_comm_copy_buffer_callback;
84 int smpi_process_count()
89 simgrid::smpi::Process* smpi_process()
91 ActorPtr me = Actor::self();
92 if (me == nullptr) // This happens sometimes (eg, when linking against NS3 because it pulls openMPI...)
94 simgrid::msg::ActorExt* msgExt = static_cast<simgrid::msg::ActorExt*>(me->get_impl()->getUserData());
95 return static_cast<simgrid::smpi::Process*>(msgExt->data);
98 simgrid::smpi::Process* smpi_process_remote(ActorPtr actor)
100 return process_data.at(actor);
103 MPI_Comm smpi_process_comm_self(){
104 return smpi_process()->comm_self();
107 void smpi_process_init(int *argc, char ***argv){
108 simgrid::smpi::Process::init(argc, argv);
111 int smpi_process_index(){
112 return simgrid::s4u::this_actor::get_pid();
115 void * smpi_process_get_user_data(){
116 return smpi_process()->get_user_data();
119 void smpi_process_set_user_data(void *data){
120 return smpi_process()->set_user_data(data);
124 int smpi_global_size()
126 char *value = getenv("SMPI_GLOBAL_SIZE");
127 xbt_assert(value,"Please set env var SMPI_GLOBAL_SIZE to the expected number of processes.");
129 return xbt_str_parse_int(value, "SMPI_GLOBAL_SIZE contains a non-numerical value: %s");
132 void smpi_comm_set_copy_data_callback(void (*callback) (smx_activity_t, void*, size_t))
134 smpi_comm_copy_data_callback = callback;
137 static void memcpy_private(void* dest, const void* src, std::vector<std::pair<size_t, size_t>>& private_blocks)
139 for (auto const& block : private_blocks)
140 memcpy((uint8_t*)dest+block.first, (uint8_t*)src+block.first, block.second-block.first);
143 static void check_blocks(std::vector<std::pair<size_t, size_t>> &private_blocks, size_t buff_size) {
144 for (auto const& block : private_blocks)
145 xbt_assert(block.first <= block.second && block.second <= buff_size, "Oops, bug in shared malloc.");
148 void smpi_comm_copy_buffer_callback(smx_activity_t synchro, void *buff, size_t buff_size)
150 simgrid::kernel::activity::CommImplPtr comm =
151 boost::dynamic_pointer_cast<simgrid::kernel::activity::CommImpl>(synchro);
154 size_t src_offset = 0;
155 size_t dst_offset = 0;
156 std::vector<std::pair<size_t, size_t>> src_private_blocks;
157 std::vector<std::pair<size_t, size_t>> dst_private_blocks;
158 XBT_DEBUG("Copy the data over");
159 if((src_shared=smpi_is_shared(buff, src_private_blocks, &src_offset))) {
160 XBT_DEBUG("Sender %p is shared. Let's ignore it.", buff);
161 src_private_blocks = shift_and_frame_private_blocks(src_private_blocks, src_offset, buff_size);
164 src_private_blocks.clear();
165 src_private_blocks.push_back(std::make_pair(0, buff_size));
167 if((dst_shared=smpi_is_shared((char*)comm->dst_buff, dst_private_blocks, &dst_offset))) {
168 XBT_DEBUG("Receiver %p is shared. Let's ignore it.", (char*)comm->dst_buff);
169 dst_private_blocks = shift_and_frame_private_blocks(dst_private_blocks, dst_offset, buff_size);
172 dst_private_blocks.clear();
173 dst_private_blocks.push_back(std::make_pair(0, buff_size));
175 check_blocks(src_private_blocks, buff_size);
176 check_blocks(dst_private_blocks, buff_size);
177 auto private_blocks = merge_private_blocks(src_private_blocks, dst_private_blocks);
178 check_blocks(private_blocks, buff_size);
180 if ((smpi_privatize_global_variables == SmpiPrivStrategies::MMAP) &&
181 (static_cast<char*>(buff) >= smpi_data_exe_start) &&
182 (static_cast<char*>(buff) < smpi_data_exe_start + smpi_data_exe_size)) {
183 XBT_DEBUG("Privatization : We are copying from a zone inside global memory... Saving data to temp buffer !");
184 smpi_switch_data_segment(comm->src_proc->iface());
185 tmpbuff = static_cast<void*>(xbt_malloc(buff_size));
186 memcpy_private(tmpbuff, buff, private_blocks);
189 if ((smpi_privatize_global_variables == SmpiPrivStrategies::MMAP) && ((char*)comm->dst_buff >= smpi_data_exe_start) &&
190 ((char*)comm->dst_buff < smpi_data_exe_start + smpi_data_exe_size)) {
191 XBT_DEBUG("Privatization : We are copying to a zone inside global memory - Switch data segment");
192 smpi_switch_data_segment(comm->dst_proc->iface());
194 XBT_DEBUG("Copying %zu bytes from %p to %p", buff_size, tmpbuff,comm->dst_buff);
195 memcpy_private(comm->dst_buff, tmpbuff, private_blocks);
197 if (comm->detached) {
198 // if this is a detached send, the source buffer was duplicated by SMPI
199 // sender to make the original buffer available to the application ASAP
201 //It seems that the request is used after the call there this should be free somewhere else but where???
202 //xbt_free(comm->comm.src_data);// inside SMPI the request is kept inside the user data and should be free
203 comm->src_buff = nullptr;
209 void smpi_comm_null_copy_buffer_callback(smx_activity_t comm, void *buff, size_t buff_size)
211 /* nothing done in this version */
214 static void smpi_check_options()
216 //check correctness of MPI parameters
218 xbt_assert(simgrid::config::get_value<int>("smpi/async-small-thresh") <=
219 simgrid::config::get_value<int>("smpi/send-is-detached-thresh"));
221 if (simgrid::config::is_default("smpi/host-speed")) {
222 XBT_INFO("You did not set the power of the host running the simulation. "
223 "The timings will certainly not be accurate. "
224 "Use the option \"--cfg=smpi/host-speed:<flops>\" to set its value."
225 "Check http://simgrid.org/simgrid/latest/doc/options.html#options_smpi_bench for more information.");
228 xbt_assert(simgrid::config::get_value<double>("smpi/cpu-threshold") >= 0,
229 "The 'smpi/cpu-threshold' option cannot have negative values [anymore]. If you want to discard "
230 "the simulation of any computation, please use 'smpi/simulate-computation:no' instead.");
234 return not process_data.empty();
237 void smpi_global_init()
239 if (not MC_is_active()) {
240 global_timer = xbt_os_timer_new();
241 xbt_os_walltimer_start(global_timer);
244 std::string filename = simgrid::config::get_value<std::string>("smpi/comp-adjustment-file");
245 if (not filename.empty()) {
246 std::ifstream fstream(filename);
247 if (not fstream.is_open()) {
248 xbt_die("Could not open file %s. Does it exist?", filename.c_str());
252 typedef boost::tokenizer< boost::escaped_list_separator<char>> Tokenizer;
253 std::getline(fstream, line); // Skip the header line
254 while (std::getline(fstream, line)) {
256 Tokenizer::iterator it = tok.begin();
257 Tokenizer::iterator end = std::next(tok.begin());
259 std::string location = *it;
260 boost::trim(location);
261 location2speedup.insert(std::pair<std::string, double>(location, std::stod(*end)));
266 // This map holds for each computation unit (such as "default" or "process1" etc.)
267 // the configuration as given by the user (counter data as a pair of (counter_name, counter_counter))
268 // and the (computed) event_set.
269 std::map</* computation unit name */ std::string, papi_process_data> units2papi_setup;
271 if (not simgrid::config::get_value<std::string>("smpi/papi-events").empty()) {
272 if (PAPI_library_init(PAPI_VER_CURRENT) != PAPI_VER_CURRENT)
273 XBT_ERROR("Could not initialize PAPI library; is it correctly installed and linked?"
274 " Expected version is %i",
277 typedef boost::tokenizer<boost::char_separator<char>> Tokenizer;
278 boost::char_separator<char> separator_units(";");
279 std::string str = simgrid::config::get_value<std::string>("smpi/papi-events");
280 Tokenizer tokens(str, separator_units);
282 // Iterate over all the computational units. This could be processes, hosts, threads, ranks... You name it.
283 // I'm not exactly sure what we will support eventually, so I'll leave it at the general term "units".
284 for (auto const& unit_it : tokens) {
285 boost::char_separator<char> separator_events(":");
286 Tokenizer event_tokens(unit_it, separator_events);
288 int event_set = PAPI_NULL;
289 if (PAPI_create_eventset(&event_set) != PAPI_OK) {
290 // TODO: Should this let the whole simulation die?
291 XBT_CRITICAL("Could not create PAPI event set during init.");
294 // NOTE: We cannot use a map here, as we must obey the order of the counters
295 // This is important for PAPI: We need to map the values of counters back
296 // to the event_names (so, when PAPI_read() has finished)!
297 papi_counter_t counters2values;
299 // Iterate over all counters that were specified for this specific
301 // Note that we need to remove the name of the unit
302 // (that could also be the "default" value), which always comes first.
303 // Hence, we start at ++(events.begin())!
304 for (Tokenizer::iterator events_it = ++(event_tokens.begin()); events_it != event_tokens.end(); ++events_it) {
306 int event_code = PAPI_NULL;
307 char* event_name = const_cast<char*>((*events_it).c_str());
308 if (PAPI_event_name_to_code(event_name, &event_code) == PAPI_OK) {
309 if (PAPI_add_event(event_set, event_code) != PAPI_OK) {
310 XBT_ERROR("Could not add PAPI event '%s'. Skipping.", event_name);
313 XBT_DEBUG("Successfully added PAPI event '%s' to the event set.", event_name);
316 XBT_CRITICAL("Could not find PAPI event '%s'. Skipping.", event_name);
320 counters2values.push_back(
321 // We cannot just pass *events_it, as this is of type const basic_string
322 std::make_pair<std::string, long long>(std::string(*events_it), 0));
325 std::string unit_name = *(event_tokens.begin());
326 papi_process_data config = {.counter_data = std::move(counters2values), .event_set = event_set};
328 units2papi_setup.insert(std::make_pair(unit_name, std::move(config)));
334 void smpi_global_destroy()
336 smpi_bench_destroy();
337 smpi_shared_destroy();
338 smpi_deployment_cleanup_instances();
340 if (simgrid::smpi::Colls::smpi_coll_cleanup_callback != nullptr)
341 simgrid::smpi::Colls::smpi_coll_cleanup_callback();
343 MPI_COMM_WORLD = MPI_COMM_NULL;
345 if (not MC_is_active()) {
346 xbt_os_timer_free(global_timer);
349 if (smpi_privatize_global_variables == SmpiPrivStrategies::MMAP)
350 smpi_destroy_global_memory_segments();
354 static void smpi_init_options(){
355 // return if already called
356 if (smpi_cpu_threshold > -1)
358 simgrid::smpi::Colls::set_collectives();
359 simgrid::smpi::Colls::smpi_coll_cleanup_callback = nullptr;
360 smpi_cpu_threshold = simgrid::config::get_value<double>("smpi/cpu-threshold");
361 smpi_host_speed = simgrid::config::get_value<double>("smpi/host-speed");
362 xbt_assert(smpi_host_speed >= 0, "You're trying to set the host_speed to a negative value (%f)", smpi_host_speed);
363 std::string smpi_privatize_option = simgrid::config::get_value<std::string>("smpi/privatization");
364 if (smpi_privatize_option == "no" || smpi_privatize_option == "0")
365 smpi_privatize_global_variables = SmpiPrivStrategies::NONE;
366 else if (smpi_privatize_option == "yes" || smpi_privatize_option == "1")
367 smpi_privatize_global_variables = SmpiPrivStrategies::DEFAULT;
368 else if (smpi_privatize_option == "mmap")
369 smpi_privatize_global_variables = SmpiPrivStrategies::MMAP;
370 else if (smpi_privatize_option == "dlopen")
371 smpi_privatize_global_variables = SmpiPrivStrategies::DLOPEN;
373 xbt_die("Invalid value for smpi/privatization: '%s'", smpi_privatize_option.c_str());
375 if (not SMPI_switch_data_segment) {
376 XBT_DEBUG("Running without smpi_main(); disable smpi/privatization.");
377 smpi_privatize_global_variables = SmpiPrivStrategies::NONE;
379 #if defined(__FreeBSD__)
380 if (smpi_privatize_global_variables == SmpiPrivStrategies::MMAP) {
381 XBT_INFO("mmap privatization is broken on FreeBSD, switching to dlopen privatization instead.");
382 smpi_privatize_global_variables = SmpiPrivStrategies::DLOPEN;
386 if (smpi_cpu_threshold < 0)
387 smpi_cpu_threshold = DBL_MAX;
389 std::string val = simgrid::config::get_value<std::string>("smpi/shared-malloc");
390 if ((val == "yes") || (val == "1") || (val == "on") || (val == "global")) {
391 smpi_cfg_shared_malloc = SharedMallocType::GLOBAL;
392 } else if (val == "local") {
393 smpi_cfg_shared_malloc = SharedMallocType::LOCAL;
394 } else if ((val == "no") || (val == "0") || (val == "off")) {
395 smpi_cfg_shared_malloc = SharedMallocType::NONE;
397 xbt_die("Invalid value '%s' for option smpi/shared-malloc. Possible values: 'on' or 'global', 'local', 'off'",
402 typedef std::function<int(int argc, char *argv[])> smpi_entry_point_type;
403 typedef int (* smpi_c_entry_point_type)(int argc, char **argv);
404 typedef void (*smpi_fortran_entry_point_type)();
406 static int smpi_run_entry_point(smpi_entry_point_type entry_point, std::vector<std::string> args)
408 char noarg[] = {'\0'};
409 const int argc = args.size();
410 std::unique_ptr<char*[]> argv(new char*[argc + 1]);
411 for (int i = 0; i != argc; ++i)
412 argv[i] = args[i].empty() ? noarg : &args[i].front();
413 argv[argc] = nullptr;
415 int res = entry_point(argc, argv.get());
417 XBT_WARN("SMPI process did not return 0. Return value : %d", res);
418 if (smpi_exit_status == 0)
419 smpi_exit_status = res;
425 // TODO, remove the number of functions involved here
426 static smpi_entry_point_type smpi_resolve_function(void* handle)
428 smpi_fortran_entry_point_type entry_point_fortran = (smpi_fortran_entry_point_type)dlsym(handle, "user_main_");
429 if (entry_point_fortran != nullptr) {
430 return [entry_point_fortran](int argc, char** argv) {
431 smpi_process_init(&argc, &argv);
432 entry_point_fortran();
437 smpi_c_entry_point_type entry_point = (smpi_c_entry_point_type)dlsym(handle, "main");
438 if (entry_point != nullptr) {
442 return smpi_entry_point_type();
445 static void smpi_copy_file(std::string src, std::string target, off_t fdin_size)
447 int fdin = open(src.c_str(), O_RDONLY);
448 xbt_assert(fdin >= 0, "Cannot read from %s. Please make sure that the file exists and is executable.", src.c_str());
449 int fdout = open(target.c_str(), O_CREAT | O_RDWR, S_IRWXU);
450 xbt_assert(fdout >= 0, "Cannot write into %s", target.c_str());
452 XBT_DEBUG("Copy %ld bytes into %s", static_cast<long>(fdin_size), target.c_str());
454 ssize_t sent_size = sendfile(fdout, fdin, NULL, fdin_size);
455 xbt_assert(sent_size == fdin_size, "Error while copying %s: only %zd bytes copied instead of %ld (errno: %d -- %s)",
456 target.c_str(), sent_size, fdin_size, errno, strerror(errno));
458 const int bufsize = 1024 * 1024 * 4;
460 while (int got = read(fdin, buf, bufsize)) {
462 xbt_assert(errno == EINTR, "Cannot read from %s", src.c_str());
466 while (int done = write(fdout, p, todo)) {
468 xbt_assert(errno == EINTR, "Cannot write into %s", target.c_str());
481 #if not defined(__APPLE__)
482 static int visit_libs(struct dl_phdr_info* info, size_t, void* data)
484 char* libname = (char*)(data);
485 const char *path = info->dlpi_name;
486 if(strstr(path, libname)){
487 strncpy(libname, path, 512);
495 static void smpi_init_privatization_dlopen(const char* executable)
497 std::string executable_copy = executable;
499 // Prepare the copy of the binary (get its size)
500 struct stat fdin_stat;
501 stat(executable_copy.c_str(), &fdin_stat);
502 off_t fdin_size = fdin_stat.st_size;
503 static std::size_t rank = 0;
505 std::string libnames = simgrid::config::get_value<std::string>("smpi/privatize-libs");
506 if (not libnames.empty()) {
508 std::vector<std::string> privatize_libs;
509 boost::split(privatize_libs, libnames, boost::is_any_of(";"));
511 for (auto const& libname : privatize_libs) {
512 // load the library once to add it to the local libs, to get the absolute path
513 void* libhandle = dlopen(libname.c_str(), RTLD_LAZY);
514 // get library name from path
515 char fullpath[512] = {'\0'};
516 strcpy(fullpath, libname.c_str());
517 #if not defined(__APPLE__)
518 int ret = dl_iterate_phdr(visit_libs, fullpath);
520 xbt_die("Can't find a linked %s - check the setting you gave to smpi/privatize-libs", fullpath);
522 XBT_DEBUG("Extra lib to privatize found : %s", fullpath);
524 xbt_die("smpi/privatize-libs is not (yet) compatible with OSX");
526 privatize_libs_paths.push_back(fullpath);
531 simix_global->default_function = [executable_copy, fdin_size](std::vector<std::string> args) {
532 return std::function<void()>([executable_copy, fdin_size, args] {
534 // Copy the dynamic library:
535 std::string target_executable =
536 executable_copy + "_" + std::to_string(getpid()) + "_" + std::to_string(rank) + ".so";
538 smpi_copy_file(executable_copy, target_executable, fdin_size);
539 // if smpi/privatize-libs is set, duplicate pointed lib and link each executable copy to a different one.
540 std::string target_lib;
541 for (auto const& libpath : privatize_libs_paths) {
542 // if we were given a full path, strip it
543 size_t index = libpath.find_last_of("/\\");
545 if (index != std::string::npos)
546 libname = libpath.substr(index + 1);
548 if (not libname.empty()) {
549 // load the library to add it to the local libs, to get the absolute path
550 struct stat fdin_stat2;
551 stat(libpath.c_str(), &fdin_stat2);
552 off_t fdin_size2 = fdin_stat2.st_size;
554 // Copy the dynamic library, the new name must be the same length as the old one
555 // just replace the name with 7 digits for the rank and the rest of the name.
556 unsigned int pad = 7;
557 if (libname.length() < pad)
558 pad = libname.length();
560 std::string(pad - std::to_string(rank).length(), '0') + std::to_string(rank) + libname.substr(pad);
561 XBT_DEBUG("copy lib %s to %s, with size %lld", libpath.c_str(), target_lib.c_str(), (long long)fdin_size2);
562 smpi_copy_file(libpath, target_lib, fdin_size2);
564 std::string sedcommand = "sed -i -e 's/" + libname + "/" + target_lib + "/g' " + target_executable;
565 int ret = system(sedcommand.c_str());
567 xbt_die("error while applying sed command %s \n", sedcommand.c_str());
572 // Load the copy and resolve the entry point:
573 void* handle = dlopen(target_executable.c_str(), RTLD_LAZY | RTLD_LOCAL | RTLD_DEEPBIND);
574 int saved_errno = errno;
575 if (simgrid::config::get_value<bool>("smpi/keep-temps") == false) {
576 unlink(target_executable.c_str());
577 if (not target_lib.empty())
578 unlink(target_lib.c_str());
580 if (handle == nullptr)
581 xbt_die("dlopen failed: %s (errno: %d -- %s)", dlerror(), saved_errno, strerror(saved_errno));
582 smpi_entry_point_type entry_point = smpi_resolve_function(handle);
584 xbt_die("Could not resolve entry point");
585 smpi_run_entry_point(entry_point, args);
590 static void smpi_init_privatization_no_dlopen(const char* executable)
592 if (smpi_privatize_global_variables == SmpiPrivStrategies::MMAP)
593 smpi_prepare_global_memory_segment();
594 // Load the dynamic library and resolve the entry point:
595 void* handle = dlopen(executable, RTLD_LAZY | RTLD_LOCAL);
596 if (handle == nullptr)
597 xbt_die("dlopen failed for %s: %s (errno: %d -- %s)", executable, dlerror(), errno, strerror(errno));
598 smpi_entry_point_type entry_point = smpi_resolve_function(handle);
600 xbt_die("main not found in %s", executable);
601 if (smpi_privatize_global_variables == SmpiPrivStrategies::MMAP)
602 smpi_backup_global_memory_segment();
604 // Execute the same entry point for each simulated process:
605 simix_global->default_function = [entry_point](std::vector<std::string> args) {
606 return std::function<void()>([entry_point, args] { smpi_run_entry_point(entry_point, args); });
610 int smpi_main(const char* executable, int argc, char* argv[])
612 srand(SMPI_RAND_SEED);
614 if (getenv("SMPI_PRETEND_CC") != nullptr) {
615 /* Hack to ensure that smpicc can pretend to be a simple compiler. Particularly handy to pass it to the
616 * configuration tools */
622 SIMIX_global_init(&argc, argv);
623 MSG_init(&argc, argv);
625 SMPI_switch_data_segment = &smpi_switch_data_segment;
627 // TODO This will not be executed in the case where smpi_main is not called,
628 // e.g., not for smpi_msg_masterslave. This should be moved to another location
629 // that is always called -- maybe close to Actor::onCreation?
630 simgrid::s4u::Host::on_creation.connect(
631 [](simgrid::s4u::Host& host) { host.extension_set(new simgrid::smpi::Host(&host)); });
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);
638 if (smpi_privatize_global_variables == SmpiPrivStrategies::DLOPEN)
639 smpi_init_privatization_dlopen(executable);
641 smpi_init_privatization_no_dlopen(executable);
644 SIMIX_launch_application(argv[2]);
645 SMPI_app_instance_register(smpi_default_instance_name.c_str(), nullptr,
646 process_data.size()); // This call has a side effect on process_count...
647 MPI_COMM_WORLD = *smpi_deployment_comm_world(smpi_default_instance_name);
648 smpi_universe_size = process_count;
651 /* Clean IO before the run */
655 if (MC_is_active()) {
661 xbt_os_walltimer_stop(global_timer);
662 if (simgrid::config::get_value<bool>("smpi/display-timing")) {
663 double global_time = xbt_os_timer_elapsed(global_timer);
664 XBT_INFO("Simulated time: %g seconds. \n\n"
665 "The simulation took %g seconds (after parsing and platform setup)\n"
666 "%g seconds were actual computation of the application",
667 SIMIX_get_clock(), global_time , smpi_total_benched_time);
669 if (smpi_total_benched_time/global_time>=0.75)
670 XBT_INFO("More than 75%% of the time was spent inside the application code.\n"
671 "You may want to use sampling functions or trace replay to reduce this.");
674 smpi_global_destroy();
676 return smpi_exit_status;
679 // Called either directly from the user code, or from the code called by smpirun
681 simgrid::s4u::Actor::on_creation.connect([](simgrid::s4u::ActorPtr actor) {
682 if (not actor->is_daemon()) {
683 process_data.insert({actor, new simgrid::smpi::Process(actor, nullptr)});
686 simgrid::s4u::Actor::on_destruction.connect([](simgrid::s4u::ActorPtr actor) {
687 auto it = process_data.find(actor);
688 if (it != process_data.end()) {
690 process_data.erase(it);
696 smpi_check_options();
697 simgrid::s4u::on_simulation_end.connect(TRACE_smpi_release);
700 void SMPI_finalize(){
701 smpi_global_destroy();
704 void smpi_mpi_init() {
705 if(smpi_init_sleep > 0)
706 simcall_process_sleep(smpi_init_sleep);
709 double smpi_mpi_wtime(){
711 if (smpi_process()->initialized() != 0 && smpi_process()->finalized() == 0 && smpi_process()->sampling() == 0) {
713 time = SIMIX_get_clock();
714 // to avoid deadlocks if used as a break condition, such as
715 // while (MPI_Wtime(...) < time_limit) {
718 // because the time will not normally advance when only calls to MPI_Wtime
719 // are made -> deadlock (MPI_Wtime never reaches the time limit)
720 if(smpi_wtime_sleep > 0)
721 simcall_process_sleep(smpi_wtime_sleep);
724 time = SIMIX_get_clock();