1 /* Copyright (c) 2007-2019. 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. */
7 #include "simgrid/s4u/Engine.hpp"
8 #include "simgrid/plugins/file_system.h"
9 #include "smpi_coll.hpp"
10 #include "smpi_f2c.hpp"
11 #include "smpi_host.hpp"
12 #include "src/kernel/activity/CommImpl.hpp"
13 #include "src/simix/smx_private.hpp"
14 #include "src/smpi/include/smpi_actor.hpp"
15 #include "xbt/config.hpp"
18 #include <boost/algorithm/string.hpp> /* trim_right / trim_left */
19 #include <boost/tokenizer.hpp>
20 #include <cfloat> /* DBL_MAX */
22 #include <cstdint> /* intmax_t */
29 #include <sys/sendfile.h>
36 #if not defined(__APPLE__) && not defined(__HAIKU__)
40 #if defined(__APPLE__)
41 # include <AvailabilityMacros.h>
42 # ifndef MAC_OS_X_VERSION_10_12
43 # define MAC_OS_X_VERSION_10_12 101200
45 constexpr bool HAVE_WORKING_MMAP = (MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_12);
46 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__sun) || defined(__HAIKU__)
47 constexpr bool HAVE_WORKING_MMAP = false;
49 constexpr bool HAVE_WORKING_MMAP = true;
52 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_kernel, smpi, "Logging specific to SMPI (kernel)");
55 extern "C" void for_rtl_init_ (int *, char **);
56 extern "C" void for_rtl_finish_ ();
58 extern "C" void __io_set_argc(int);
59 extern "C" void __io_set_argv(char **);
61 extern "C" void _gfortran_set_args(int, char **);
64 /* RTLD_DEEPBIND is a bad idea of GNU ld that obviously does not exist on other platforms
65 * See https://www.akkadia.org/drepper/dsohowto.pdf
66 * and https://lists.freebsd.org/pipermail/freebsd-current/2016-March/060284.html
68 #if !RTLD_DEEPBIND || HAVE_SANITIZER_ADDRESS || HAVE_SANITIZER_THREAD
69 #define WANT_RTLD_DEEPBIND 0
71 #define WANT_RTLD_DEEPBIND RTLD_DEEPBIND
75 std::string papi_default_config_name = "default";
76 std::map</* computation unit name */ std::string, papi_process_data> units2papi_setup;
79 std::unordered_map<std::string, double> location2speedup;
81 static std::map</*process_id*/ simgrid::s4u::Actor const*, simgrid::smpi::ActorExt*> process_data;
82 static int smpi_exit_status = 0;
83 extern double smpi_total_benched_time;
84 xbt_os_timer_t global_timer;
85 static std::vector<std::string> privatize_libs_paths;
87 * Setting MPI_COMM_WORLD to MPI_COMM_UNINITIALIZED (it's a variable)
88 * is important because the implementation of MPI_Comm checks
89 * "this == MPI_COMM_UNINITIALIZED"? If yes, it uses smpi_process()->comm_world()
91 * This is basically how we only have one global variable but all processes have
92 * different communicators (the one their SMPI instance uses).
94 * See smpi_comm.cpp and the functions therein for details.
96 MPI_Comm MPI_COMM_WORLD = MPI_COMM_UNINITIALIZED;
97 MPI_Errhandler *MPI_ERRORS_RETURN = nullptr;
98 MPI_Errhandler *MPI_ERRORS_ARE_FATAL = nullptr;
99 MPI_Errhandler *MPI_ERRHANDLER_NULL = nullptr;
100 // No instance gets manually created; check also the smpirun.in script as
101 // this default name is used there as well (when the <actor> tag is generated).
102 static const std::string smpi_default_instance_name("smpirun");
103 static simgrid::config::Flag<double> smpi_init_sleep(
104 "smpi/init", "Time to inject inside a call to MPI_Init", 0.0);
106 void (*smpi_comm_copy_data_callback)(simgrid::kernel::activity::CommImpl*, void*,
107 size_t) = &smpi_comm_copy_buffer_callback;
109 simgrid::smpi::ActorExt* smpi_process()
111 simgrid::s4u::ActorPtr me = simgrid::s4u::Actor::self();
113 if (me == nullptr) // This happens sometimes (eg, when linking against NS3 because it pulls openMPI...)
116 return process_data.at(me.get());
119 simgrid::smpi::ActorExt* smpi_process_remote(simgrid::s4u::ActorPtr actor)
121 if (actor.get() == nullptr)
123 return process_data.at(actor.get());
126 MPI_Comm smpi_process_comm_self(){
127 return smpi_process()->comm_self();
130 MPI_Info smpi_process_info_env(){
131 return smpi_process()->info_env();
134 void * smpi_process_get_user_data(){
135 return simgrid::s4u::Actor::self()->get_impl()->get_user_data();
138 void smpi_process_set_user_data(void *data){
139 simgrid::s4u::Actor::self()->get_impl()->set_user_data(data);
142 void smpi_comm_set_copy_data_callback(void (*callback) (smx_activity_t, void*, size_t))
144 static void (*saved_callback)(smx_activity_t, void*, size_t);
145 saved_callback = callback;
146 smpi_comm_copy_data_callback = [](simgrid::kernel::activity::CommImpl* comm, void* buff, size_t size) {
147 saved_callback(smx_activity_t(comm), buff, size);
151 static void memcpy_private(void* dest, const void* src, std::vector<std::pair<size_t, size_t>>& private_blocks)
153 for (auto const& block : private_blocks)
154 memcpy((uint8_t*)dest+block.first, (uint8_t*)src+block.first, block.second-block.first);
157 static void check_blocks(std::vector<std::pair<size_t, size_t>> &private_blocks, size_t buff_size) {
158 for (auto const& block : private_blocks)
159 xbt_assert(block.first <= block.second && block.second <= buff_size, "Oops, bug in shared malloc.");
162 void smpi_comm_copy_buffer_callback(simgrid::kernel::activity::CommImpl* comm, void* buff, size_t buff_size)
164 size_t src_offset = 0;
165 size_t dst_offset = 0;
166 std::vector<std::pair<size_t, size_t>> src_private_blocks;
167 std::vector<std::pair<size_t, size_t>> dst_private_blocks;
168 XBT_DEBUG("Copy the data over");
169 if(smpi_is_shared(buff, src_private_blocks, &src_offset)) {
170 XBT_DEBUG("Sender %p is shared. Let's ignore it.", buff);
171 src_private_blocks = shift_and_frame_private_blocks(src_private_blocks, src_offset, buff_size);
174 src_private_blocks.clear();
175 src_private_blocks.push_back(std::make_pair(0, buff_size));
177 if (smpi_is_shared((char*)comm->dst_buff_, dst_private_blocks, &dst_offset)) {
178 XBT_DEBUG("Receiver %p is shared. Let's ignore it.", (char*)comm->dst_buff_);
179 dst_private_blocks = shift_and_frame_private_blocks(dst_private_blocks, dst_offset, buff_size);
182 dst_private_blocks.clear();
183 dst_private_blocks.push_back(std::make_pair(0, buff_size));
185 check_blocks(src_private_blocks, buff_size);
186 check_blocks(dst_private_blocks, buff_size);
187 auto private_blocks = merge_private_blocks(src_private_blocks, dst_private_blocks);
188 check_blocks(private_blocks, buff_size);
190 if ((smpi_privatize_global_variables == SmpiPrivStrategies::MMAP) &&
191 (static_cast<char*>(buff) >= smpi_data_exe_start) &&
192 (static_cast<char*>(buff) < smpi_data_exe_start + smpi_data_exe_size)) {
193 XBT_DEBUG("Privatization : We are copying from a zone inside global memory... Saving data to temp buffer !");
194 smpi_switch_data_segment(comm->src_actor_->iface());
195 tmpbuff = static_cast<void*>(xbt_malloc(buff_size));
196 memcpy_private(tmpbuff, buff, private_blocks);
199 if ((smpi_privatize_global_variables == SmpiPrivStrategies::MMAP) &&
200 ((char*)comm->dst_buff_ >= smpi_data_exe_start) &&
201 ((char*)comm->dst_buff_ < smpi_data_exe_start + smpi_data_exe_size)) {
202 XBT_DEBUG("Privatization : We are copying to a zone inside global memory - Switch data segment");
203 smpi_switch_data_segment(comm->dst_actor_->iface());
205 XBT_DEBUG("Copying %zu bytes from %p to %p", buff_size, tmpbuff, comm->dst_buff_);
206 memcpy_private(comm->dst_buff_, tmpbuff, private_blocks);
208 if (comm->detached()) {
209 // if this is a detached send, the source buffer was duplicated by SMPI
210 // sender to make the original buffer available to the application ASAP
212 //It seems that the request is used after the call there this should be free somewhere else but where???
213 //xbt_free(comm->comm.src_data);// inside SMPI the request is kept inside the user data and should be free
214 comm->src_buff_ = nullptr;
220 void smpi_comm_null_copy_buffer_callback(simgrid::kernel::activity::CommImpl*, void*, size_t)
222 /* nothing done in this version */
225 static void smpi_check_options()
227 //check correctness of MPI parameters
229 xbt_assert(simgrid::config::get_value<int>("smpi/async-small-thresh") <=
230 simgrid::config::get_value<int>("smpi/send-is-detached-thresh"));
232 if (simgrid::config::is_default("smpi/host-speed") && not MC_is_active()) {
233 XBT_INFO("You did not set the power of the host running the simulation. "
234 "The timings will certainly not be accurate. "
235 "Use the option \"--cfg=smpi/host-speed:<flops>\" to set its value. "
237 "https://simgrid.org/doc/latest/Configuring_SimGrid.html#automatic-benchmarking-of-smpi-code for more "
241 xbt_assert(simgrid::config::get_value<double>("smpi/cpu-threshold") >= 0,
242 "The 'smpi/cpu-threshold' option cannot have negative values [anymore]. If you want to discard "
243 "the simulation of any computation, please use 'smpi/simulate-computation:no' instead.");
247 return MPI_COMM_WORLD != MPI_COMM_UNINITIALIZED;
250 static void smpi_init_papi()
253 // This map holds for each computation unit (such as "default" or "process1" etc.)
254 // the configuration as given by the user (counter data as a pair of (counter_name, counter_counter))
255 // and the (computed) event_set.
257 if (not simgrid::config::get_value<std::string>("smpi/papi-events").empty()) {
258 if (PAPI_library_init(PAPI_VER_CURRENT) != PAPI_VER_CURRENT)
259 XBT_ERROR("Could not initialize PAPI library; is it correctly installed and linked?"
260 " Expected version is %u", PAPI_VER_CURRENT);
262 typedef boost::tokenizer<boost::char_separator<char>> Tokenizer;
263 boost::char_separator<char> separator_units(";");
264 std::string str = simgrid::config::get_value<std::string>("smpi/papi-events");
265 Tokenizer tokens(str, separator_units);
267 // Iterate over all the computational units. This could be processes, hosts, threads, ranks... You name it.
268 // I'm not exactly sure what we will support eventually, so I'll leave it at the general term "units".
269 for (auto const& unit_it : tokens) {
270 boost::char_separator<char> separator_events(":");
271 Tokenizer event_tokens(unit_it, separator_events);
273 int event_set = PAPI_NULL;
274 if (PAPI_create_eventset(&event_set) != PAPI_OK) {
275 // TODO: Should this let the whole simulation die?
276 XBT_CRITICAL("Could not create PAPI event set during init.");
279 // NOTE: We cannot use a map here, as we must obey the order of the counters
280 // This is important for PAPI: We need to map the values of counters back
281 // to the event_names (so, when PAPI_read() has finished)!
282 papi_counter_t counters2values;
284 // Iterate over all counters that were specified for this specific
286 // Note that we need to remove the name of the unit
287 // (that could also be the "default" value), which always comes first.
288 // Hence, we start at ++(events.begin())!
289 for (Tokenizer::iterator events_it = ++(event_tokens.begin()); events_it != event_tokens.end(); ++events_it) {
291 int event_code = PAPI_NULL;
292 char* event_name = const_cast<char*>((*events_it).c_str());
293 if (PAPI_event_name_to_code(event_name, &event_code) != PAPI_OK) {
294 XBT_CRITICAL("Could not find PAPI event '%s'. Skipping.", event_name);
297 if (PAPI_add_event(event_set, event_code) != PAPI_OK) {
298 XBT_ERROR("Could not add PAPI event '%s'. Skipping.", event_name);
301 XBT_DEBUG("Successfully added PAPI event '%s' to the event set.", event_name);
303 counters2values.push_back(
304 // We cannot just pass *events_it, as this is of type const basic_string
305 std::make_pair<std::string, long long>(std::string(*events_it), 0));
308 std::string unit_name = *(event_tokens.begin());
309 papi_process_data config = {.counter_data = std::move(counters2values), .event_set = event_set};
311 units2papi_setup.insert(std::make_pair(unit_name, std::move(config)));
317 static void smpi_init_options(){
318 // return if already called
319 if (smpi_cpu_threshold > -1)
321 simgrid::smpi::Colls::set_collectives();
322 simgrid::smpi::Colls::smpi_coll_cleanup_callback = nullptr;
323 smpi_cpu_threshold = simgrid::config::get_value<double>("smpi/cpu-threshold");
324 if (smpi_cpu_threshold < 0)
325 smpi_cpu_threshold = DBL_MAX;
327 smpi_host_speed = simgrid::config::get_value<double>("smpi/host-speed");
328 std::string smpi_privatize_option = simgrid::config::get_value<std::string>("smpi/privatization");
329 if (smpi_privatize_option == "no" || smpi_privatize_option == "0")
330 smpi_privatize_global_variables = SmpiPrivStrategies::NONE;
331 else if (smpi_privatize_option == "yes" || smpi_privatize_option == "1")
332 smpi_privatize_global_variables = SmpiPrivStrategies::DEFAULT;
333 else if (smpi_privatize_option == "mmap")
334 smpi_privatize_global_variables = SmpiPrivStrategies::MMAP;
335 else if (smpi_privatize_option == "dlopen")
336 smpi_privatize_global_variables = SmpiPrivStrategies::DLOPEN;
338 xbt_die("Invalid value for smpi/privatization: '%s'", smpi_privatize_option.c_str());
340 if (not SMPI_switch_data_segment) {
341 XBT_DEBUG("Running without smpi_main(); disable smpi/privatization.");
342 smpi_privatize_global_variables = SmpiPrivStrategies::NONE;
344 if (not HAVE_WORKING_MMAP && smpi_privatize_global_variables == SmpiPrivStrategies::MMAP) {
345 XBT_INFO("mmap privatization is broken on this platform, switching to dlopen privatization instead.");
346 smpi_privatize_global_variables = SmpiPrivStrategies::DLOPEN;
349 std::string val = simgrid::config::get_value<std::string>("smpi/shared-malloc");
350 if ((val == "yes") || (val == "1") || (val == "on") || (val == "global")) {
351 smpi_cfg_shared_malloc = SharedMallocType::GLOBAL;
352 } else if (val == "local") {
353 smpi_cfg_shared_malloc = SharedMallocType::LOCAL;
354 } else if ((val == "no") || (val == "0") || (val == "off")) {
355 smpi_cfg_shared_malloc = SharedMallocType::NONE;
357 xbt_die("Invalid value '%s' for option smpi/shared-malloc. Possible values: 'on' or 'global', 'local', 'off'",
362 typedef std::function<int(int argc, char *argv[])> smpi_entry_point_type;
363 typedef int (* smpi_c_entry_point_type)(int argc, char **argv);
364 typedef void (*smpi_fortran_entry_point_type)();
366 template <typename F>
367 static int smpi_run_entry_point(const F& entry_point, const std::string& executable_path, std::vector<std::string> args)
369 // copy C strings, we need them writable
370 std::vector<char*>* args4argv = new std::vector<char*>(args.size());
371 std::transform(begin(args), end(args), begin(*args4argv), [](const std::string& s) { return xbt_strdup(s.c_str()); });
373 // set argv[0] to executable_path
374 xbt_free((*args4argv)[0]);
375 (*args4argv)[0] = xbt_strdup(executable_path.c_str());
378 // take a copy of args4argv to keep reference of the allocated strings
379 const std::vector<char*> args2str(*args4argv);
381 int argc = args4argv->size();
382 args4argv->push_back(nullptr);
383 char** argv = args4argv->data();
386 for_rtl_init_ (&argc, argv);
391 _gfortran_set_args(argc, argv);
393 int res = entry_point(argc, argv);
398 for (char* s : args2str)
404 XBT_WARN("SMPI process did not return 0. Return value : %d", res);
405 if (smpi_exit_status == 0)
406 smpi_exit_status = res;
412 // TODO, remove the number of functions involved here
413 static smpi_entry_point_type smpi_resolve_function(void* handle)
415 smpi_fortran_entry_point_type entry_point_fortran = (smpi_fortran_entry_point_type)dlsym(handle, "user_main_");
416 if (entry_point_fortran != nullptr) {
417 return [entry_point_fortran](int, char**) {
418 entry_point_fortran();
423 smpi_c_entry_point_type entry_point = (smpi_c_entry_point_type)dlsym(handle, "main");
424 if (entry_point != nullptr) {
428 return smpi_entry_point_type();
431 static void smpi_copy_file(const std::string& src, const std::string& target, off_t fdin_size)
433 int fdin = open(src.c_str(), O_RDONLY);
434 xbt_assert(fdin >= 0, "Cannot read from %s. Please make sure that the file exists and is executable.", src.c_str());
435 int fdout = open(target.c_str(), O_CREAT | O_RDWR, S_IRWXU);
436 xbt_assert(fdout >= 0, "Cannot write into %s", target.c_str());
438 XBT_DEBUG("Copy %" PRIdMAX " bytes into %s", static_cast<intmax_t>(fdin_size), target.c_str());
440 ssize_t sent_size = sendfile(fdout, fdin, NULL, fdin_size);
441 if (sent_size == fdin_size) {
445 } else if (sent_size != -1 || errno != ENOSYS) {
446 xbt_die("Error while copying %s: only %zd bytes copied instead of %" PRIdMAX " (errno: %d -- %s)", target.c_str(),
447 sent_size, static_cast<intmax_t>(fdin_size), errno, strerror(errno));
450 // If this point is reached, sendfile() actually is not available. Copy file by hand.
451 const int bufsize = 1024 * 1024 * 4;
452 char* buf = new char[bufsize];
453 while (int got = read(fdin, buf, bufsize)) {
455 xbt_assert(errno == EINTR, "Cannot read from %s", src.c_str());
459 while (int done = write(fdout, p, todo)) {
461 xbt_assert(errno == EINTR, "Cannot write into %s", target.c_str());
474 #if not defined(__APPLE__) && not defined(__HAIKU__)
475 static int visit_libs(struct dl_phdr_info* info, size_t, void* data)
477 char* libname = (char*)(data);
478 const char *path = info->dlpi_name;
479 if(strstr(path, libname)){
480 strncpy(libname, path, 512);
488 static void smpi_init_privatization_dlopen(const std::string& executable)
490 // Prepare the copy of the binary (get its size)
491 struct stat fdin_stat;
492 stat(executable.c_str(), &fdin_stat);
493 off_t fdin_size = fdin_stat.st_size;
495 std::string libnames = simgrid::config::get_value<std::string>("smpi/privatize-libs");
496 if (not libnames.empty()) {
498 std::vector<std::string> privatize_libs;
499 boost::split(privatize_libs, libnames, boost::is_any_of(";"));
501 for (auto const& libname : privatize_libs) {
502 // load the library once to add it to the local libs, to get the absolute path
503 void* libhandle = dlopen(libname.c_str(), RTLD_LAZY);
504 // get library name from path
505 char fullpath[512] = {'\0'};
506 strncpy(fullpath, libname.c_str(), 511);
507 #if not defined(__APPLE__) && not defined(__HAIKU__)
508 xbt_assert(0 != dl_iterate_phdr(visit_libs, fullpath),
509 "Can't find a linked %s - check your settings in smpi/privatize-libs", fullpath);
510 XBT_DEBUG("Extra lib to privatize '%s' found", fullpath);
512 xbt_die("smpi/privatize-libs is not (yet) compatible with OSX nor with Haiku");
514 privatize_libs_paths.push_back(fullpath);
519 simix_global->default_function = [executable, fdin_size](std::vector<std::string> args) {
520 return std::function<void()>([executable, fdin_size, args] {
521 static std::size_t rank = 0;
522 // Copy the dynamic library:
523 std::string target_executable =
524 executable + "_" + std::to_string(getpid()) + "_" + std::to_string(rank) + ".so";
526 smpi_copy_file(executable, target_executable, fdin_size);
527 // if smpi/privatize-libs is set, duplicate pointed lib and link each executable copy to a different one.
528 std::vector<std::string> target_libs;
529 for (auto const& libpath : privatize_libs_paths) {
530 // if we were given a full path, strip it
531 size_t index = libpath.find_last_of("/\\");
533 if (index != std::string::npos)
534 libname = libpath.substr(index + 1);
536 if (not libname.empty()) {
537 // load the library to add it to the local libs, to get the absolute path
538 struct stat fdin_stat2;
539 stat(libpath.c_str(), &fdin_stat2);
540 off_t fdin_size2 = fdin_stat2.st_size;
542 // Copy the dynamic library, the new name must be the same length as the old one
543 // just replace the name with 7 digits for the rank and the rest of the name.
544 unsigned int pad = 7;
545 if (libname.length() < pad)
546 pad = libname.length();
547 std::string target_lib =
548 std::string(pad - std::to_string(rank).length(), '0') + std::to_string(rank) + libname.substr(pad);
549 target_libs.push_back(target_lib);
550 XBT_DEBUG("copy lib %s to %s, with size %lld", libpath.c_str(), target_lib.c_str(), (long long)fdin_size2);
551 smpi_copy_file(libpath, target_lib, fdin_size2);
553 std::string sedcommand = "sed -i -e 's/" + libname + "/" + target_lib + "/g' " + target_executable;
554 xbt_assert(system(sedcommand.c_str()) == 0, "error while applying sed command %s \n", sedcommand.c_str());
559 // Load the copy and resolve the entry point:
560 void* handle = dlopen(target_executable.c_str(), RTLD_LAZY | RTLD_LOCAL | WANT_RTLD_DEEPBIND);
561 int saved_errno = errno;
562 if (simgrid::config::get_value<bool>("smpi/keep-temps") == false) {
563 unlink(target_executable.c_str());
564 for (const std::string& target_lib : target_libs)
565 unlink(target_lib.c_str());
567 xbt_assert(handle != nullptr, "dlopen failed: %s (errno: %d -- %s)", dlerror(), saved_errno,
568 strerror(saved_errno));
570 smpi_entry_point_type entry_point = smpi_resolve_function(handle);
571 xbt_assert(entry_point, "Could not resolve entry point");
572 smpi_run_entry_point(entry_point, executable, args);
577 static void smpi_init_privatization_no_dlopen(const std::string& executable)
579 if (smpi_privatize_global_variables == SmpiPrivStrategies::MMAP)
580 smpi_prepare_global_memory_segment();
582 // Load the dynamic library and resolve the entry point:
583 void* handle = dlopen(executable.c_str(), RTLD_LAZY | RTLD_LOCAL);
584 xbt_assert(handle != nullptr, "dlopen failed for %s: %s (errno: %d -- %s)", executable.c_str(), dlerror(), errno,
586 smpi_entry_point_type entry_point = smpi_resolve_function(handle);
587 xbt_assert(entry_point, "main not found in %s", executable.c_str());
589 if (smpi_privatize_global_variables == SmpiPrivStrategies::MMAP)
590 smpi_backup_global_memory_segment();
592 // Execute the same entry point for each simulated process:
593 simix_global->default_function = [entry_point, executable](std::vector<std::string> args) {
594 return std::function<void()>(
595 [entry_point, executable, args] { smpi_run_entry_point(entry_point, executable, args); });
599 int smpi_main(const char* executable, int argc, char* argv[])
601 if (getenv("SMPI_PRETEND_CC") != nullptr) {
602 /* Hack to ensure that smpicc can pretend to be a simple compiler. Particularly handy to pass it to the
603 * configuration tools */
608 SIMIX_global_init(&argc, argv);
610 SMPI_switch_data_segment = &smpi_switch_data_segment;
611 sg_storage_file_system_init();
612 // parse the platform file: get the host list
613 simgrid::s4u::Engine::get_instance()->load_platform(argv[1]);
614 SIMIX_comm_set_copy_data_callback(smpi_comm_copy_buffer_callback);
617 if (smpi_privatize_global_variables == SmpiPrivStrategies::DLOPEN)
618 smpi_init_privatization_dlopen(executable);
620 smpi_init_privatization_no_dlopen(executable);
623 simgrid::s4u::Engine::get_instance()->load_deployment(argv[2]);
624 SMPI_app_instance_register(smpi_default_instance_name.c_str(), nullptr,
625 process_data.size()); // This call has a side effect on process_count...
626 MPI_COMM_WORLD = *smpi_deployment_comm_world(smpi_default_instance_name);
628 /* Clean IO before the run */
632 if (MC_is_active()) {
638 xbt_os_walltimer_stop(global_timer);
639 if (simgrid::config::get_value<bool>("smpi/display-timing")) {
640 double global_time = xbt_os_timer_elapsed(global_timer);
641 XBT_INFO("Simulated time: %g seconds. \n\n"
642 "The simulation took %g seconds (after parsing and platform setup)\n"
643 "%g seconds were actual computation of the application",
644 SIMIX_get_clock(), global_time , smpi_total_benched_time);
646 if (smpi_total_benched_time/global_time>=0.75)
647 XBT_INFO("More than 75%% of the time was spent inside the application code.\n"
648 "You may want to use sampling functions or trace replay to reduce this.");
653 return smpi_exit_status;
656 // Called either directly from the user code, or from the code called by smpirun
658 simgrid::s4u::Actor::on_creation.connect([](simgrid::s4u::Actor& actor) {
659 if (not actor.is_daemon()) {
660 process_data.insert({&actor, new simgrid::smpi::ActorExt(&actor)});
663 simgrid::s4u::Actor::on_destruction.connect([](simgrid::s4u::Actor const& actor) {
664 XBT_DEBUG("Delete the extension of actor %s", actor.get_cname());
665 auto it = process_data.find(&actor);
666 if (it != process_data.end()) {
668 process_data.erase(it);
671 simgrid::s4u::Host::on_creation.connect(
672 [](simgrid::s4u::Host& host) { host.extension_set(new simgrid::smpi::Host(&host)); });
675 if (not MC_is_active()) {
676 global_timer = xbt_os_timer_new();
677 xbt_os_walltimer_start(global_timer);
680 std::string filename = simgrid::config::get_value<std::string>("smpi/comp-adjustment-file");
681 if (not filename.empty()) {
682 std::ifstream fstream(filename);
683 xbt_assert(fstream.is_open(), "Could not open file %s. Does it exist?", filename.c_str());
686 typedef boost::tokenizer<boost::escaped_list_separator<char>> Tokenizer;
687 std::getline(fstream, line); // Skip the header line
688 while (std::getline(fstream, line)) {
690 Tokenizer::iterator it = tok.begin();
691 Tokenizer::iterator end = std::next(tok.begin());
693 std::string location = *it;
694 boost::trim(location);
695 location2speedup.insert(std::pair<std::string, double>(location, std::stod(*end)));
699 smpi_check_options();
704 smpi_bench_destroy();
705 smpi_shared_destroy();
706 smpi_deployment_cleanup_instances();
708 if (simgrid::smpi::Colls::smpi_coll_cleanup_callback != nullptr)
709 simgrid::smpi::Colls::smpi_coll_cleanup_callback();
711 MPI_COMM_WORLD = MPI_COMM_NULL;
713 if (not MC_is_active()) {
714 xbt_os_timer_free(global_timer);
717 if (smpi_privatize_global_variables == SmpiPrivStrategies::MMAP)
718 smpi_destroy_global_memory_segments();
719 if (simgrid::smpi::F2C::lookup() != nullptr)
720 simgrid::smpi::F2C::delete_lookup();
723 void smpi_mpi_init() {
724 smpi_init_fortran_types();
725 if(smpi_init_sleep > 0)
726 simgrid::s4u::this_actor::sleep_for(smpi_init_sleep);