/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
+#include <dlfcn.h>
+#include <fcntl.h>
+#include <spawn.h>
+#include <sys/sendfile.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
#include "mc/mc.h"
#include "private.h"
#include "private.hpp"
#include "src/mc/mc_replay.h"
#include "src/msg/msg_private.h"
#include "src/simix/smx_private.h"
+#include "src/surf/surf_interface.hpp"
#include "surf/surf.h"
#include "xbt/replay.hpp"
#include <xbt/config.hpp>
#include <stdio.h>
#include <stdlib.h>
#include <string>
+#include <utility>
#include <vector>
+#include <memory>
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_kernel, smpi, "Logging specific to SMPI (kernel)");
#include <boost/tokenizer.hpp>
#include <boost/algorithm/string.hpp> /* trim_right / trim_left */
+#ifndef RTLD_DEEPBIND
+/* RTLD_DEEPBIND is a bad idea of GNU ld that obviously does not exist on other platforms
+ * See https://www.akkadia.org/drepper/dsohowto.pdf
+ * and https://lists.freebsd.org/pipermail/freebsd-current/2016-March/060284.html
+*/
+#define RTLD_DEEPBIND 0
+#endif
+
+/* Mac OSX does not have any header file providing that definition so we have to duplicate it here. Bummers. */
+extern char** environ; /* we use it in posix_spawnp below */
+
#if HAVE_PAPI
#include "papi.h"
const char* papi_default_config_name = "default";
void smpi_comm_copy_buffer_callback(smx_activity_t synchro, void *buff, size_t buff_size)
{
- void* tmpbuff=buff;
+
simgrid::kernel::activity::Comm *comm = dynamic_cast<simgrid::kernel::activity::Comm*>(synchro);
XBT_DEBUG("Copy the data over");
}else if(smpi_is_shared((char*)comm->dst_buff)){
XBT_DEBUG("Receiver %p is shared. Let's ignore it.", (char*)comm->dst_buff);
}else{
-
- if((smpi_privatize_global_variables) && (static_cast<char*>(buff) >= smpi_start_data_exe)
+ void* tmpbuff=buff;
+ if((smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP) && (static_cast<char*>(buff) >= smpi_start_data_exe)
&& (static_cast<char*>(buff) < smpi_start_data_exe + smpi_size_data_exe )
){
XBT_DEBUG("Privatization : We are copying from a zone inside global memory... Saving data to temp buffer !");
memcpy(tmpbuff, buff, buff_size);
}
- if((smpi_privatize_global_variables) && ((char*)comm->dst_buff >= smpi_start_data_exe)
+ if((smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP) && ((char*)comm->dst_buff >= smpi_start_data_exe)
&& ((char*)comm->dst_buff < smpi_start_data_exe + smpi_size_data_exe )){
XBT_DEBUG("Privatization : We are copying to a zone inside global memory - Switch data segment");
smpi_switch_data_segment(
XBT_DEBUG("Copying %zu bytes from %p to %p", buff_size, tmpbuff,comm->dst_buff);
memcpy(comm->dst_buff, tmpbuff, buff_size);
- }
- if (comm->detached) {
- // if this is a detached send, the source buffer was duplicated by SMPI
- // sender to make the original buffer available to the application ASAP
- xbt_free(buff);
- //It seems that the request is used after the call there this should be free somewhere else but where???
- //xbt_free(comm->comm.src_data);// inside SMPI the request is kept inside the user data and should be free
- comm->src_buff = nullptr;
+
+ if (comm->detached) {
+ // if this is a detached send, the source buffer was duplicated by SMPI
+ // sender to make the original buffer available to the application ASAP
+ xbt_free(buff);
+ //It seems that the request is used after the call there this should be free somewhere else but where???
+ //xbt_free(comm->comm.src_data);// inside SMPI the request is kept inside the user data and should be free
+ comm->src_buff = nullptr;
+ }
+ if(tmpbuff!=buff)xbt_free(tmpbuff);
}
- if(tmpbuff!=buff)xbt_free(tmpbuff);
}
void smpi_comm_null_copy_buffer_callback(smx_activity_t comm, void *buff, size_t buff_size)
void smpi_global_init()
{
- int i;
MPI_Group group;
- int smpirun=0;
if (!MC_is_active()) {
global_timer = xbt_os_timer_new();
}
}
#endif
+
+ int smpirun = 0;
+ msg_bar_t finalization_barrier = nullptr;
if (process_count == 0){
process_count = SIMIX_process_count();
smpirun=1;
+ finalization_barrier = MSG_barrier_init(process_count);
}
smpi_universe_size = process_count;
process_data = new simgrid::smpi::Process*[process_count];
- for (i = 0; i < process_count; i++) {
- process_data[i] = new simgrid::smpi::Process(i);
+ for (int i = 0; i < process_count; i++) {
+ process_data[i] = new simgrid::smpi::Process(i, finalization_barrier);
}
//if the process was launched through smpirun script we generate a global mpi_comm_world
//if not, we let MPI_COMM_NULL, and the comm world will be private to each mpi instance
- if(smpirun){
+ if (smpirun) {
group = new simgrid::smpi::Group(process_count);
MPI_COMM_WORLD = new simgrid::smpi::Comm(group, nullptr);
MPI_Attr_put(MPI_COMM_WORLD, MPI_UNIVERSE_SIZE, reinterpret_cast<void *>(process_count));
- msg_bar_t bar = MSG_barrier_init(process_count);
- for (i = 0; i < process_count; i++) {
+ for (int i = 0; i < process_count; i++)
group->set_mapping(i, i);
- process_data[i]->set_finalization_barrier(bar);
- }
}
}
}
xbt_free(index_to_process_data);
- if(smpi_privatize_global_variables)
+ if(smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP)
smpi_destroy_global_memory_segments();
smpi_free_static();
}
extern "C" {
-#ifndef WIN32
-
-void __attribute__ ((weak)) user_main_()
-{
- xbt_die("Should not be in this smpi_simulated_main");
-}
-
-int __attribute__ ((weak)) smpi_simulated_main_(int argc, char **argv)
-{
- simgrid::smpi::Process::init(&argc, &argv);
- user_main_();
- return 0;
-}
-
-inline static int smpi_main_wrapper(int argc, char **argv){
- int ret = smpi_simulated_main_(argc,argv);
- if(ret !=0){
- XBT_WARN("SMPI process did not return 0. Return value : %d", ret);
- smpi_process()->set_return_value(ret);
- }
- return 0;
-}
-
-int __attribute__ ((weak)) main(int argc, char **argv)
-{
- return smpi_main(smpi_main_wrapper, argc, argv);
-}
-
-#endif
-
static void smpi_init_logs(){
/* Connect log categories. See xbt/log.c */
simgrid::smpi::Colls::smpi_coll_cleanup_callback=nullptr;
smpi_cpu_threshold = xbt_cfg_get_double("smpi/cpu-threshold");
smpi_host_speed = xbt_cfg_get_double("smpi/host-speed");
- smpi_privatize_global_variables = xbt_cfg_get_boolean("smpi/privatize-global-variables");
+ const char* smpi_privatize_option = xbt_cfg_get_string("smpi/privatize-global-variables");
+ if (std::strcmp(smpi_privatize_option, "no") == 0)
+ smpi_privatize_global_variables = SMPI_PRIVATIZE_NONE;
+ else if (std::strcmp(smpi_privatize_option, "yes") == 0)
+ smpi_privatize_global_variables = SMPI_PRIVATIZE_DEFAULT;
+ else if (std::strcmp(smpi_privatize_option, "mmap") == 0)
+ smpi_privatize_global_variables = SMPI_PRIVATIZE_MMAP;
+ else if (std::strcmp(smpi_privatize_option, "dlopen") == 0)
+ smpi_privatize_global_variables = SMPI_PRIVATIZE_DLOPEN;
+
+ // Some compatibility stuff:
+ else if (std::strcmp(smpi_privatize_option, "1") == 0)
+ smpi_privatize_global_variables = SMPI_PRIVATIZE_DEFAULT;
+ else if (std::strcmp(smpi_privatize_option, "0") == 0)
+ smpi_privatize_global_variables = SMPI_PRIVATIZE_NONE;
+
+ else
+ xbt_die("Invalid value for smpi/privatize-global-variables: %s",
+ smpi_privatize_option);
+
if (smpi_cpu_threshold < 0)
smpi_cpu_threshold = DBL_MAX;
}
}
-int smpi_main(int (*realmain) (int argc, char *argv[]), int argc, char *argv[])
+static int execute_command(const char * const argv[])
+{
+ pid_t pid;
+ int status;
+ if (posix_spawnp(&pid, argv[0], nullptr, nullptr, (char* const*) argv, environ) != 0)
+ return 127;
+ if (waitpid(pid, &status, 0) != pid)
+ return 127;
+ return status;
+}
+
+typedef std::function<int(int argc, char *argv[])> smpi_entry_point_type;
+typedef int (* smpi_c_entry_point_type)(int argc, char **argv);
+typedef void (* smpi_fortran_entry_point_type)(void);
+
+static int smpi_run_entry_point(smpi_entry_point_type entry_point, std::vector<std::string> args)
+{
+ const int argc = args.size();
+ std::unique_ptr<char*[]> argv(new char*[argc + 1]);
+ for (int i = 0; i != argc; ++i)
+ argv[i] = args[i].empty() ? const_cast<char*>(""): &args[i].front();
+ argv[argc] = nullptr;
+
+ int res = entry_point(argc, argv.get());
+ if (res != 0){
+ XBT_WARN("SMPI process did not return 0. Return value : %d", res);
+ smpi_process()->set_return_value(res);
+ }
+ return 0;
+}
+
+// TODO, remove the number of functions involved here
+static smpi_entry_point_type smpi_resolve_function(void* handle)
+{
+ smpi_fortran_entry_point_type entry_point2 =
+ (smpi_fortran_entry_point_type) dlsym(handle, "user_main_");
+ if (entry_point2 != nullptr) {
+ // fprintf(stderr, "EP user_main_=%p\n", entry_point2);
+ return [entry_point2](int argc, char** argv) {
+ smpi_process_init(&argc, &argv);
+ entry_point2();
+ return 0;
+ };
+ }
+
+ smpi_c_entry_point_type entry_point = (smpi_c_entry_point_type) dlsym(handle, "main");
+ if (entry_point != nullptr) {
+ // fprintf(stderr, "EP main=%p\n", entry_point);
+ return entry_point;
+ }
+
+ return smpi_entry_point_type();
+}
+
+int smpi_main(const char* executable, int argc, char *argv[])
{
srand(SMPI_RAND_SEED);
* configuration tools */
return 0;
}
- smpi_init_logs();
TRACE_global_init(&argc, argv);
- TRACE_add_start_function(TRACE_smpi_alloc);
- TRACE_add_end_function(TRACE_smpi_release);
SIMIX_global_init(&argc, argv);
MSG_init(&argc,argv);
SMPI_switch_data_segment = &smpi_switch_data_segment;
- smpi_init_options();
-
// parse the platform file: get the host list
SIMIX_create_environment(argv[1]);
- SIMIX_comm_set_copy_data_callback(smpi_comm_copy_data_callback);
- SIMIX_function_register_default(realmain);
- SIMIX_launch_application(argv[2]);
+ SIMIX_comm_set_copy_data_callback(smpi_comm_copy_buffer_callback);
- smpi_global_init();
+ static std::size_t rank = 0;
- smpi_check_options();
+ if (smpi_privatize_global_variables == SMPI_PRIVATIZE_DLOPEN) {
- if(smpi_privatize_global_variables)
- smpi_initialize_global_memory_segments();
+ std::string executable_copy = executable;
+
+ // Prepare the copy of the binary (open the file and get its size)
+ // (fdin will remain open for the whole process execution. That's a sort of leak but we can live with it)
+ int fdin = open(executable_copy.c_str(), O_RDONLY);
+ xbt_assert(fdin >= 0, "Cannot read from %s", executable_copy.c_str());
+ struct stat fdin_stat;
+ fstat(fdin, &fdin_stat);
+ off_t fdin_size = fdin_stat.st_size;
+
+ simix_global->default_function = [executable_copy, fdin, fdin_size](std::vector<std::string> args) {
+ return std::function<void()>([executable_copy, fdin, fdin_size, args] {
+
+ // Copy the dynamic library:
+ std::string target_executable = executable_copy
+ + "_" + std::to_string(getpid())
+ + "_" + std::to_string(rank++) + ".so";
+
+ int fdout = open(target_executable.c_str(), O_WRONLY);
+ xbt_assert(fdout >= 0, "Cannot write into %s", target_executable.c_str());
+
+ sendfile(fdout, fdin, NULL, fdin_size);
+ close(fdout);
+
+ // Load the copy and resolve the entry point:
+ void* handle = dlopen(target_executable.c_str(), RTLD_LAZY | RTLD_LOCAL | RTLD_DEEPBIND);
+ unlink(target_executable.c_str());
+ if (handle == nullptr)
+ xbt_die("dlopen failed");
+ smpi_entry_point_type entry_point = smpi_resolve_function(handle);
+ if (!entry_point)
+ xbt_die("Could not resolve entry point");
+
+ smpi_run_entry_point(entry_point, args);
+ });
+ };
+
+ }
+ else {
+
+ // Load the dynamic library and resolve the entry point:
+ void* handle = dlopen(executable, RTLD_LAZY | RTLD_LOCAL | RTLD_DEEPBIND);
+ if (handle == nullptr)
+ xbt_die("dlopen failed for %s", executable);
+ smpi_entry_point_type entry_point = smpi_resolve_function(handle);
+ if (!entry_point)
+ xbt_die("main not found in %s", executable);
+ // TODO, register the executable for SMPI privatization
+
+ // Execute the same entry point for each simulated process:
+ simix_global->default_function = [entry_point](std::vector<std::string> args) {
+ return std::function<void()>([entry_point, args] {
+ smpi_run_entry_point(entry_point, args);
+ });
+ };
+
+ }
+
+ SIMIX_launch_application(argv[2]);
+
+ SMPI_init();
/* Clean IO before the run */
fflush(stdout);
return ret;
}
-// This function can be called from extern file, to initialize logs, options, and processes of smpi
-// without the need of smpirun
+// Called either directly from the user code, or from the code called by smpirun
void SMPI_init(){
smpi_init_logs();
smpi_init_options();
smpi_global_init();
smpi_check_options();
- if (TRACE_is_enabled() && TRACE_is_configured())
- TRACE_smpi_alloc();
- if(smpi_privatize_global_variables)
+ TRACE_smpi_alloc();
+ simgrid::surf::surfExitCallbacks.connect(TRACE_smpi_release);
+ if(smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP)
smpi_initialize_global_memory_segments();
}
