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 "src/mc/mc_config.hpp"
33 #include <sys/sendfile.h>
40 #if not defined(__APPLE__) && not defined(__HAIKU__)
44 #if defined(__APPLE__)
45 # include <AvailabilityMacros.h>
46 # ifndef MAC_OS_X_VERSION_10_12
47 # define MAC_OS_X_VERSION_10_12 101200
49 constexpr bool HAVE_WORKING_MMAP = (MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_12);
50 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__sun) || defined(__HAIKU__)
51 constexpr bool HAVE_WORKING_MMAP = false;
53 constexpr bool HAVE_WORKING_MMAP = true;
56 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_kernel, smpi, "Logging specific to SMPI (kernel)");
59 extern "C" void for_rtl_init_ (int *, char **);
60 extern "C" void for_rtl_finish_ ();
62 extern "C" void __io_set_argc(int);
63 extern "C" void __io_set_argv(char **);
65 extern "C" void _gfortran_set_args(int, char **);
68 /* RTLD_DEEPBIND is a bad idea of GNU ld that obviously does not exist on other platforms
69 * See https://www.akkadia.org/drepper/dsohowto.pdf
70 * and https://lists.freebsd.org/pipermail/freebsd-current/2016-March/060284.html
72 #if !RTLD_DEEPBIND || HAVE_SANITIZER_ADDRESS || HAVE_SANITIZER_THREAD
73 #define WANT_RTLD_DEEPBIND 0
75 #define WANT_RTLD_DEEPBIND RTLD_DEEPBIND
79 std::string papi_default_config_name = "default";
80 std::map</* computation unit name */ std::string, papi_process_data> units2papi_setup;
83 std::unordered_map<std::string, double> location2speedup;
85 static int smpi_exit_status = 0;
86 extern double smpi_total_benched_time;
87 xbt_os_timer_t global_timer;
88 static std::vector<std::string> privatize_libs_paths;
90 * Setting MPI_COMM_WORLD to MPI_COMM_UNINITIALIZED (it's a variable)
91 * is important because the implementation of MPI_Comm checks
92 * "this == MPI_COMM_UNINITIALIZED"? If yes, it uses smpi_process()->comm_world()
94 * This is basically how we only have one global variable but all processes have
95 * different communicators (the one their SMPI instance uses).
97 * See smpi_comm.cpp and the functions therein for details.
99 MPI_Comm MPI_COMM_WORLD = MPI_COMM_UNINITIALIZED;
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 me->extension<simgrid::smpi::ActorExt>();
119 simgrid::smpi::ActorExt* smpi_process_remote(simgrid::s4u::ActorPtr actor)
121 if (actor.get() == nullptr)
123 return actor->extension<simgrid::smpi::ActorExt>();
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_data();
138 void smpi_process_set_user_data(void *data){
139 simgrid::s4u::Actor::self()->set_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()
228 if (MC_is_active()) {
229 if (_sg_mc_buffering == "zero")
230 simgrid::config::set_value<int>("smpi/send-is-detached-thresh", 0);
231 else if (_sg_mc_buffering == "infty")
232 simgrid::config::set_value<int>("smpi/send-is-detached-thresh", INT_MAX);
238 xbt_assert(simgrid::config::get_value<int>("smpi/async-small-thresh") <=
239 simgrid::config::get_value<int>("smpi/send-is-detached-thresh"),
240 "smpi/async-small-thresh (=%d) should be smaller or equal to smpi/send-is-detached-thresh (=%d)",
241 simgrid::config::get_value<int>("smpi/async-small-thresh"),
242 simgrid::config::get_value<int>("smpi/send-is-detached-thresh"));
244 if (simgrid::config::is_default("smpi/host-speed") && not MC_is_active()) {
245 XBT_INFO("You did not set the power of the host running the simulation. "
246 "The timings will certainly not be accurate. "
247 "Use the option \"--cfg=smpi/host-speed:<flops>\" to set its value. "
249 "https://simgrid.org/doc/latest/Configuring_SimGrid.html#automatic-benchmarking-of-smpi-code for more "
253 xbt_assert(simgrid::config::get_value<double>("smpi/cpu-threshold") >= 0,
254 "The 'smpi/cpu-threshold' option cannot have negative values [anymore]. If you want to discard "
255 "the simulation of any computation, please use 'smpi/simulate-computation:no' instead.");
259 return MPI_COMM_WORLD != MPI_COMM_UNINITIALIZED;
262 static void smpi_init_papi()
265 // This map holds for each computation unit (such as "default" or "process1" etc.)
266 // the configuration as given by the user (counter data as a pair of (counter_name, counter_counter))
267 // and the (computed) event_set.
269 if (not simgrid::config::get_value<std::string>("smpi/papi-events").empty()) {
270 if (PAPI_library_init(PAPI_VER_CURRENT) != PAPI_VER_CURRENT)
271 XBT_ERROR("Could not initialize PAPI library; is it correctly installed and linked?"
272 " Expected version is %u", PAPI_VER_CURRENT);
274 typedef boost::tokenizer<boost::char_separator<char>> Tokenizer;
275 boost::char_separator<char> separator_units(";");
276 std::string str = simgrid::config::get_value<std::string>("smpi/papi-events");
277 Tokenizer tokens(str, separator_units);
279 // Iterate over all the computational units. This could be processes, hosts, threads, ranks... You name it.
280 // I'm not exactly sure what we will support eventually, so I'll leave it at the general term "units".
281 for (auto const& unit_it : tokens) {
282 boost::char_separator<char> separator_events(":");
283 Tokenizer event_tokens(unit_it, separator_events);
285 int event_set = PAPI_NULL;
286 if (PAPI_create_eventset(&event_set) != PAPI_OK) {
287 // TODO: Should this let the whole simulation die?
288 XBT_CRITICAL("Could not create PAPI event set during init.");
291 // NOTE: We cannot use a map here, as we must obey the order of the counters
292 // This is important for PAPI: We need to map the values of counters back
293 // to the event_names (so, when PAPI_read() has finished)!
294 papi_counter_t counters2values;
296 // Iterate over all counters that were specified for this specific
298 // Note that we need to remove the name of the unit
299 // (that could also be the "default" value), which always comes first.
300 // Hence, we start at ++(events.begin())!
301 for (Tokenizer::iterator events_it = ++(event_tokens.begin()); events_it != event_tokens.end(); ++events_it) {
303 int event_code = PAPI_NULL;
304 char* event_name = const_cast<char*>((*events_it).c_str());
305 if (PAPI_event_name_to_code(event_name, &event_code) != PAPI_OK) {
306 XBT_CRITICAL("Could not find PAPI event '%s'. Skipping.", event_name);
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);
315 counters2values.push_back(
316 // We cannot just pass *events_it, as this is of type const basic_string
317 std::make_pair<std::string, long long>(std::string(*events_it), 0));
320 std::string unit_name = *(event_tokens.begin());
321 papi_process_data config = {.counter_data = std::move(counters2values), .event_set = event_set};
323 units2papi_setup.insert(std::make_pair(unit_name, std::move(config)));
329 static void smpi_init_options(){
330 // return if already called
331 if (smpi_cpu_threshold > -1)
333 simgrid::smpi::colls::set_collectives();
334 simgrid::smpi::colls::smpi_coll_cleanup_callback = nullptr;
335 smpi_cpu_threshold = simgrid::config::get_value<double>("smpi/cpu-threshold");
336 if (smpi_cpu_threshold < 0)
337 smpi_cpu_threshold = DBL_MAX;
339 smpi_host_speed = simgrid::config::get_value<double>("smpi/host-speed");
340 std::string smpi_privatize_option = simgrid::config::get_value<std::string>("smpi/privatization");
341 if (smpi_privatize_option == "no" || smpi_privatize_option == "0")
342 smpi_privatize_global_variables = SmpiPrivStrategies::NONE;
343 else if (smpi_privatize_option == "yes" || smpi_privatize_option == "1")
344 smpi_privatize_global_variables = SmpiPrivStrategies::DEFAULT;
345 else if (smpi_privatize_option == "mmap")
346 smpi_privatize_global_variables = SmpiPrivStrategies::MMAP;
347 else if (smpi_privatize_option == "dlopen")
348 smpi_privatize_global_variables = SmpiPrivStrategies::DLOPEN;
350 xbt_die("Invalid value for smpi/privatization: '%s'", smpi_privatize_option.c_str());
352 if (not SMPI_switch_data_segment) {
353 XBT_DEBUG("Running without smpi_main(); disable smpi/privatization.");
354 smpi_privatize_global_variables = SmpiPrivStrategies::NONE;
356 if (not HAVE_WORKING_MMAP && smpi_privatize_global_variables == SmpiPrivStrategies::MMAP) {
357 XBT_INFO("mmap privatization is broken on this platform, switching to dlopen privatization instead.");
358 smpi_privatize_global_variables = SmpiPrivStrategies::DLOPEN;
361 std::string val = simgrid::config::get_value<std::string>("smpi/shared-malloc");
362 if ((val == "yes") || (val == "1") || (val == "on") || (val == "global")) {
363 smpi_cfg_shared_malloc = SharedMallocType::GLOBAL;
364 } else if (val == "local") {
365 smpi_cfg_shared_malloc = SharedMallocType::LOCAL;
366 } else if ((val == "no") || (val == "0") || (val == "off")) {
367 smpi_cfg_shared_malloc = SharedMallocType::NONE;
369 xbt_die("Invalid value '%s' for option smpi/shared-malloc. Possible values: 'on' or 'global', 'local', 'off'",
374 typedef std::function<int(int argc, char *argv[])> smpi_entry_point_type;
375 typedef int (* smpi_c_entry_point_type)(int argc, char **argv);
376 typedef void (*smpi_fortran_entry_point_type)();
378 template <typename F>
379 static int smpi_run_entry_point(const F& entry_point, const std::string& executable_path, std::vector<std::string> args)
381 // copy C strings, we need them writable
382 std::vector<char*>* args4argv = new std::vector<char*>(args.size());
383 std::transform(begin(args), end(args), begin(*args4argv), [](const std::string& s) { return xbt_strdup(s.c_str()); });
385 // set argv[0] to executable_path
386 xbt_free((*args4argv)[0]);
387 (*args4argv)[0] = xbt_strdup(executable_path.c_str());
390 // take a copy of args4argv to keep reference of the allocated strings
391 const std::vector<char*> args2str(*args4argv);
393 int argc = args4argv->size();
394 args4argv->push_back(nullptr);
395 char** argv = args4argv->data();
398 for_rtl_init_ (&argc, argv);
403 _gfortran_set_args(argc, argv);
405 int res = entry_point(argc, argv);
410 for (char* s : args2str)
416 XBT_WARN("SMPI process did not return 0. Return value : %d", res);
417 if (smpi_exit_status == 0)
418 smpi_exit_status = res;
424 // TODO, remove the number of functions involved here
425 static smpi_entry_point_type smpi_resolve_function(void* handle)
427 smpi_fortran_entry_point_type entry_point_fortran = (smpi_fortran_entry_point_type)dlsym(handle, "user_main_");
428 if (entry_point_fortran != nullptr) {
429 return [entry_point_fortran](int, char**) {
430 entry_point_fortran();
435 smpi_c_entry_point_type entry_point = (smpi_c_entry_point_type)dlsym(handle, "main");
436 if (entry_point != nullptr) {
440 return smpi_entry_point_type();
443 static void smpi_copy_file(const std::string& src, const std::string& target, off_t fdin_size)
445 int fdin = open(src.c_str(), O_RDONLY);
446 xbt_assert(fdin >= 0, "Cannot read from %s. Please make sure that the file exists and is executable.", src.c_str());
447 int fdout = open(target.c_str(), O_CREAT | O_RDWR, S_IRWXU);
448 xbt_assert(fdout >= 0, "Cannot write into %s", target.c_str());
450 XBT_DEBUG("Copy %" PRIdMAX " bytes into %s", static_cast<intmax_t>(fdin_size), target.c_str());
452 ssize_t sent_size = sendfile(fdout, fdin, NULL, fdin_size);
453 if (sent_size == fdin_size) {
457 } else if (sent_size != -1 || errno != ENOSYS) {
458 xbt_die("Error while copying %s: only %zd bytes copied instead of %" PRIdMAX " (errno: %d -- %s)", target.c_str(),
459 sent_size, static_cast<intmax_t>(fdin_size), errno, strerror(errno));
462 // If this point is reached, sendfile() actually is not available. Copy file by hand.
463 const int bufsize = 1024 * 1024 * 4;
464 char* buf = new char[bufsize];
465 while (int got = read(fdin, buf, bufsize)) {
467 xbt_assert(errno == EINTR, "Cannot read from %s", src.c_str());
471 while (int done = write(fdout, p, todo)) {
473 xbt_assert(errno == EINTR, "Cannot write into %s", target.c_str());
486 #if not defined(__APPLE__) && not defined(__HAIKU__)
487 static int visit_libs(struct dl_phdr_info* info, size_t, void* data)
489 char* libname = (char*)(data);
490 const char *path = info->dlpi_name;
491 if(strstr(path, libname)){
492 strncpy(libname, path, 512);
500 static void smpi_init_privatization_dlopen(const std::string& executable)
502 // Prepare the copy of the binary (get its size)
503 struct stat fdin_stat;
504 stat(executable.c_str(), &fdin_stat);
505 off_t fdin_size = fdin_stat.st_size;
507 std::string libnames = simgrid::config::get_value<std::string>("smpi/privatize-libs");
508 if (not libnames.empty()) {
510 std::vector<std::string> privatize_libs;
511 boost::split(privatize_libs, libnames, boost::is_any_of(";"));
513 for (auto const& libname : privatize_libs) {
514 // load the library once to add it to the local libs, to get the absolute path
515 void* libhandle = dlopen(libname.c_str(), RTLD_LAZY);
516 // get library name from path
517 char fullpath[512] = {'\0'};
518 strncpy(fullpath, libname.c_str(), 511);
519 #if not defined(__APPLE__) && not defined(__HAIKU__)
520 xbt_assert(0 != dl_iterate_phdr(visit_libs, fullpath),
521 "Can't find a linked %s - check your settings in smpi/privatize-libs", fullpath);
522 XBT_DEBUG("Extra lib to privatize '%s' found", fullpath);
524 xbt_die("smpi/privatize-libs is not (yet) compatible with OSX nor with Haiku");
526 privatize_libs_paths.push_back(fullpath);
531 simix_global->default_function = [executable, fdin_size](std::vector<std::string> args) {
532 return std::function<void()>([executable, fdin_size, args] {
533 static std::size_t rank = 0;
534 // Copy the dynamic library:
535 std::string target_executable =
536 executable + "_" + std::to_string(getpid()) + "_" + std::to_string(rank) + ".so";
538 smpi_copy_file(executable, 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::vector<std::string> target_libs;
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();
559 std::string target_lib =
560 std::string(pad - std::to_string(rank).length(), '0') + std::to_string(rank) + libname.substr(pad);
561 target_libs.push_back(target_lib);
562 XBT_DEBUG("copy lib %s to %s, with size %lld", libpath.c_str(), target_lib.c_str(), (long long)fdin_size2);
563 smpi_copy_file(libpath, target_lib, fdin_size2);
565 std::string sedcommand = "sed -i -e 's/" + libname + "/" + target_lib + "/g' " + target_executable;
566 xbt_assert(system(sedcommand.c_str()) == 0, "error while applying sed command %s \n", sedcommand.c_str());
571 // Load the copy and resolve the entry point:
572 void* handle = dlopen(target_executable.c_str(), RTLD_LAZY | RTLD_LOCAL | WANT_RTLD_DEEPBIND);
573 int saved_errno = errno;
574 if (simgrid::config::get_value<bool>("smpi/keep-temps") == false) {
575 unlink(target_executable.c_str());
576 for (const std::string& target_lib : target_libs)
577 unlink(target_lib.c_str());
579 xbt_assert(handle != nullptr, "dlopen failed: %s (errno: %d -- %s)", dlerror(), saved_errno,
580 strerror(saved_errno));
582 smpi_entry_point_type entry_point = smpi_resolve_function(handle);
583 xbt_assert(entry_point, "Could not resolve entry point");
584 smpi_run_entry_point(entry_point, executable, args);
589 static void smpi_init_privatization_no_dlopen(const std::string& executable)
591 if (smpi_privatize_global_variables == SmpiPrivStrategies::MMAP)
592 smpi_prepare_global_memory_segment();
594 // Load the dynamic library and resolve the entry point:
595 void* handle = dlopen(executable.c_str(), RTLD_LAZY | RTLD_LOCAL);
596 xbt_assert(handle != nullptr, "dlopen failed for %s: %s (errno: %d -- %s)", executable.c_str(), dlerror(), errno,
598 smpi_entry_point_type entry_point = smpi_resolve_function(handle);
599 xbt_assert(entry_point, "main not found in %s", executable.c_str());
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, executable](std::vector<std::string> args) {
606 return std::function<void()>(
607 [entry_point, executable, args] { smpi_run_entry_point(entry_point, executable, args); });
611 int smpi_main(const char* executable, int argc, char* argv[])
613 if (getenv("SMPI_PRETEND_CC") != nullptr) {
614 /* Hack to ensure that smpicc can pretend to be a simple compiler. Particularly handy to pass it to the
615 * configuration tools */
620 SIMIX_global_init(&argc, argv);
622 auto engine = simgrid::s4u::Engine::get_instance();
623 SMPI_switch_data_segment = &smpi_switch_data_segment;
624 sg_storage_file_system_init();
625 // parse the platform file: get the host list
626 engine->load_platform(argv[1]);
627 SIMIX_comm_set_copy_data_callback(smpi_comm_copy_buffer_callback);
630 if (smpi_privatize_global_variables == SmpiPrivStrategies::DLOPEN)
631 smpi_init_privatization_dlopen(executable);
633 smpi_init_privatization_no_dlopen(executable);
637 /* This is a ... heavy way to count the MPI ranks */
639 simgrid::s4u::Actor::on_creation.connect([&rank_counts](simgrid::s4u::Actor& actor) {
640 if (not actor.is_daemon())
643 engine->load_deployment(argv[2]);
645 SMPI_app_instance_register(smpi_default_instance_name.c_str(), nullptr, rank_counts);
646 MPI_COMM_WORLD = *smpi_deployment_comm_world(smpi_default_instance_name);
648 /* Clean IO before the run */
652 if (MC_is_active()) {
658 xbt_os_walltimer_stop(global_timer);
659 if (simgrid::config::get_value<bool>("smpi/display-timing")) {
660 double global_time = xbt_os_timer_elapsed(global_timer);
661 XBT_INFO("Simulated time: %g seconds. \n\n"
662 "The simulation took %g seconds (after parsing and platform setup)\n"
663 "%g seconds were actual computation of the application",
664 SIMIX_get_clock(), global_time , smpi_total_benched_time);
666 if (smpi_total_benched_time/global_time>=0.75)
667 XBT_INFO("More than 75%% of the time was spent inside the application code.\n"
668 "You may want to use sampling functions or trace replay to reduce this.");
673 return smpi_exit_status;
676 // Called either directly from the user code, or from the code called by smpirun
678 simgrid::s4u::Actor::on_creation.connect([](simgrid::s4u::Actor& actor) {
679 if (not actor.is_daemon())
680 actor.extension_set<simgrid::smpi::ActorExt>(new simgrid::smpi::ActorExt(&actor));
682 simgrid::s4u::Host::on_creation.connect(
683 [](simgrid::s4u::Host& host) { host.extension_set(new simgrid::smpi::Host(&host)); });
684 for (auto const& host : simgrid::s4u::Engine::get_instance()->get_all_hosts())
685 host->extension_set(new simgrid::smpi::Host(host));
688 if (not MC_is_active()) {
689 global_timer = xbt_os_timer_new();
690 xbt_os_walltimer_start(global_timer);
693 std::string filename = simgrid::config::get_value<std::string>("smpi/comp-adjustment-file");
694 if (not filename.empty()) {
695 std::ifstream fstream(filename);
696 xbt_assert(fstream.is_open(), "Could not open file %s. Does it exist?", filename.c_str());
699 typedef boost::tokenizer<boost::escaped_list_separator<char>> Tokenizer;
700 std::getline(fstream, line); // Skip the header line
701 while (std::getline(fstream, line)) {
703 Tokenizer::iterator it = tok.begin();
704 Tokenizer::iterator end = std::next(tok.begin());
706 std::string location = *it;
707 boost::trim(location);
708 location2speedup.insert(std::pair<std::string, double>(location, std::stod(*end)));
712 smpi_check_options();
717 smpi_bench_destroy();
718 smpi_shared_destroy();
719 smpi_deployment_cleanup_instances();
721 if (simgrid::smpi::colls::smpi_coll_cleanup_callback != nullptr)
722 simgrid::smpi::colls::smpi_coll_cleanup_callback();
724 MPI_COMM_WORLD = MPI_COMM_NULL;
726 if (not MC_is_active()) {
727 xbt_os_timer_free(global_timer);
730 if (smpi_privatize_global_variables == SmpiPrivStrategies::MMAP)
731 smpi_destroy_global_memory_segments();
732 if (simgrid::smpi::F2C::lookup() != nullptr)
733 simgrid::smpi::F2C::delete_lookup();
736 void smpi_mpi_init() {
737 smpi_init_fortran_types();
738 if(smpi_init_sleep > 0)
739 simgrid::s4u::this_actor::sleep_for(smpi_init_sleep);