X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/bbfde1ef5427e4e7e84ca8d38aff13507947c194..1d4060280e644ae033b653472cb0de76eb079455:/src/mc/mc_dpor.c diff --git a/src/mc/mc_dpor.c b/src/mc/mc_dpor.c index 436ca80c4d..b4588480f6 100644 --- a/src/mc/mc_dpor.c +++ b/src/mc/mc_dpor.c @@ -7,7 +7,7 @@ #include "private.h" XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_dpor, mc, - "Logging specific to MC DPOR exploration"); + "Logging specific to MC DPOR exploration"); /** * \brief Initialize the DPOR exploration algorithm @@ -15,7 +15,7 @@ XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_dpor, mc, void MC_dpor_init() { mc_state_t initial_state = NULL; - mc_transition_t trans = NULL; + smx_process_t process; /* Create the initial state and push it into the exploration stack */ MC_SET_RAW_MEM; @@ -23,23 +23,25 @@ void MC_dpor_init() xbt_fifo_unshift(mc_stack, initial_state); MC_UNSET_RAW_MEM; - /* Schedule all the processes to detect the transitions of the initial state */ - DEBUG0("**************************************************"); + DEBUG0("**************************************************"); DEBUG0("Initial state"); - MC_schedule_enabled_processes(); - MC_SET_RAW_MEM; - MC_trans_compute_enabled(initial_state->enabled_transitions, - initial_state->transitions); + /* Wait for requests (schedules processes) */ + MC_wait_for_requests(); - /* Fill the interleave set of the initial state with an enabled process */ - trans = xbt_setset_set_choose(initial_state->enabled_transitions); - if(trans) - xbt_setset_set_insert(initial_state->interleave, trans); + MC_SET_RAW_MEM; + /* Get an enabled process and insert it in the interleave set of the initial state */ + xbt_swag_foreach(process, simix_global->process_list){ + if(SIMIX_process_is_enabled(process)){ + xbt_setset_set_insert(initial_state->interleave, process); + break; + } + } MC_UNSET_RAW_MEM; - - /* Update Statistics */ - mc_stats->state_size += xbt_setset_set_size(initial_state->enabled_transitions); + + /* FIXME: Update Statistics + mc_stats->state_size += + xbt_setset_set_size(initial_state->enabled_transitions); */ } @@ -49,151 +51,147 @@ void MC_dpor_init() */ void MC_dpor(void) { - mc_transition_t trans = NULL; - mc_state_t next_state = NULL; - xbt_setset_cursor_t cursor = NULL; - - while(xbt_fifo_size(mc_stack) > 0){ - - DEBUG0("**************************************************"); + char *req_str, deadlock; + smx_req_t req = NULL; + mc_state_t state = NULL, prev_state = NULL, next_state = NULL; + smx_process_t process = NULL; + xbt_fifo_item_t item = NULL; - /* FIXME: Think about what happen if there are no transitions but there are - some actions on the models. (ex. all the processes do a sleep(0) in a round). */ + while (xbt_fifo_size(mc_stack) > 0) { + + DEBUG0("**************************************************"); /* Get current state */ - mc_current_state = (mc_state_t) xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack)); - - /* If there are transitions to execute and the maximun depth has not been reached + state = (mc_state_t) + xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack)); + + /* If there are processes to interleave and the maximun depth has not been reached then perform one step of the exploration algorithm */ - if(xbt_setset_set_size(mc_current_state->interleave) > 0 && xbt_fifo_size(mc_stack) < MAX_DEPTH){ + if (xbt_setset_set_size(state->interleave) > 0 + && xbt_fifo_size(mc_stack) < MAX_DEPTH) { - DEBUG4("Exploration detph=%d (state=%p)(%d interleave) (%d enabled)", xbt_fifo_size(mc_stack), - mc_current_state, xbt_setset_set_size(mc_current_state->interleave), - xbt_setset_set_size(mc_current_state->enabled_transitions)); + DEBUG3("Exploration detph=%d (state=%p)(%d interleave)", + xbt_fifo_size(mc_stack), state, + xbt_setset_set_size(state->interleave)); - xbt_setset_foreach(mc_current_state->enabled_transitions, cursor, trans){ - DEBUG1("\t %s", trans->name); - } - /* Update statistics */ mc_stats->visited_states++; mc_stats->executed_transitions++; - - /* Choose a transition to execute from the interleave set of the current - state, and create the data structures for the new expanded state in the - exploration stack. */ - MC_SET_RAW_MEM; - trans = xbt_setset_set_choose(mc_current_state->interleave); - if(!trans->type == mc_random){ - xbt_setset_set_remove(mc_current_state->interleave, trans); - /* Add the transition in the done set of the current state */ - xbt_setset_set_insert(mc_current_state->done, trans); - } - - next_state = MC_state_new(); - xbt_fifo_unshift(mc_stack, next_state); - - /* Set it as the executed transition of the current state */ - mc_current_state->executed_transition = trans; - MC_UNSET_RAW_MEM; - /* Execute the selected transition by scheduling it's associated process. - Then schedule every process that got ready to run due to the execution - of the transition */ - DEBUG1("Executing transition %s", trans->name); - SIMIX_process_schedule(trans->process); - MC_execute_surf_actions(); /* Do surf's related black magic */ - MC_schedule_enabled_processes(); - - if(trans->type == mc_random && trans->random.current_value < trans->random.max){ - trans->random.current_value++; - }else{ - trans->random.current_value = trans->random.min; - xbt_setset_set_remove(mc_current_state->interleave, trans); - xbt_setset_set_insert(mc_current_state->done, trans); - } - - /* Calculate the enabled transitions set of the next state */ MC_SET_RAW_MEM; - xbt_setset_add(next_state->transitions, mc_current_state->transitions); - xbt_setset_set_remove(next_state->transitions, trans); - MC_trans_compute_enabled(next_state->enabled_transitions, next_state->transitions); - - /* Choose one transition to interleave from the enabled transition set */ - trans = xbt_setset_set_choose(next_state->enabled_transitions); - if(trans) - xbt_setset_set_insert(next_state->interleave, trans); + /* Choose a request to execute from the the current state */ + req = MC_state_get_request(state); MC_UNSET_RAW_MEM; - /* Update Statistics */ - mc_stats->state_size += xbt_setset_set_size(next_state->enabled_transitions); + if(req){ + /* Answer the request */ + /* Debug information */ + if(XBT_LOG_ISENABLED(mc_dpor, xbt_log_priority_debug)){ + req_str = MC_request_to_string(req); + DEBUG1("Execute: %s", req_str); + xbt_free(req_str); + } + + MC_state_set_executed_request(state, req); + + SIMIX_request_pre(req); /* After this call req is no longer usefull */ + + /* Wait for requests (schedules processes) */ + MC_wait_for_requests(); + + /* Create the new expanded state */ + MC_SET_RAW_MEM; + next_state = MC_state_new(); + xbt_fifo_unshift(mc_stack, next_state); + + /* Get an enabled process and insert it in the interleave set of the next state */ + xbt_swag_foreach(process, simix_global->process_list){ + if(SIMIX_process_is_enabled(process)){ + xbt_setset_set_insert(next_state->interleave, process); + break; + } + } + MC_UNSET_RAW_MEM; + + /* FIXME: Update Statistics + mc_stats->state_size += + xbt_setset_set_size(next_state->enabled_transitions);*/ + } /* Let's loop again */ - - /* The interleave set is empty or the maximum depth is reached, let's back-track */ - }else{ - DEBUG0("There are no more transitions to interleave."); - + /* The interleave set is empty or the maximum depth is reached, let's back-track */ + } else { + DEBUG0("There are no more processes to interleave."); + /* Check for deadlocks */ - xbt_setset_substract(mc_current_state->transitions, mc_current_state->done); - if(xbt_setset_set_size(mc_current_state->transitions) > 0){ - INFO0("**************************"); - INFO0("*** DEAD-LOCK DETECTED ***"); - INFO0("**************************"); - INFO0("Counter-example execution trace:"); - MC_dump_stack(mc_stack); - MC_print_statistics(mc_stats); - xbt_abort(); + if(xbt_swag_size(simix_global->process_list)){ + deadlock = TRUE; + xbt_swag_foreach(process, simix_global->process_list){ + if(process->request.call != REQ_NO_REQ + && SIMIX_request_is_enabled(&process->request)){ + deadlock = FALSE; + break; + } + } + + if(deadlock){ + MC_show_deadlock(&process->request); + return; + } } - - mc_transition_t q = NULL; - xbt_fifo_item_t item = NULL; - mc_state_t state = NULL; - - //MC_show_stack(mc_stack); - + + /* + INFO0("*********************************"); + MC_show_stack(mc_stack); */ + /* Trash the current state, no longer needed */ MC_SET_RAW_MEM; xbt_fifo_shift(mc_stack); - MC_state_delete(mc_current_state); - + MC_state_delete(state); + /* Traverse the stack backwards until a state with a non empty interleave set is found, deleting all the states that have it empty in the way. - For each deleted state, check if the transition that has generated it - (from it's predecesor state), depends on any other previous transition + For each deleted state, check if the request that has generated it + (from it's predecesor state), depends on any other previous request executed before it. If it does then add it to the interleave set of the - state that executed that previous transition. */ - while((mc_current_state = xbt_fifo_shift(mc_stack)) != NULL){ - q = mc_current_state->executed_transition; - xbt_fifo_foreach(mc_stack, item, state, mc_state_t){ - if(MC_transition_depend(q, state->executed_transition)){ - DEBUG3("Dependence found at state %p (%p,%p)", state, state->executed_transition, q); - xbt_setset_foreach(state->enabled_transitions, cursor, trans){ - if((trans->process == q->process) && !xbt_setset_set_belongs(state->done, trans)){ - DEBUG2("Unexplored interleaving found at state %p (%p)", state, trans); - xbt_setset_set_insert(state->interleave, trans); - break; - } + state that executed that previous request. */ + while ((state = xbt_fifo_shift(mc_stack)) != NULL) { + req = MC_state_get_executed_request(state); + xbt_fifo_foreach(mc_stack, item, prev_state, mc_state_t) { + if(MC_request_depend(req, MC_state_get_executed_request(prev_state))){ + if(XBT_LOG_ISENABLED(mc_dpor, xbt_log_priority_debug)){ + DEBUG0("Dependent Transitions:"); + req_str = MC_request_to_string(MC_state_get_executed_request(prev_state)); + DEBUG2("%s (state=%p)", req_str, prev_state); + xbt_free(req_str); + req_str = MC_request_to_string(req); + DEBUG2("%s (state=%p)", req_str, state); + xbt_free(req_str); } - if(trans) - break; + + if(!xbt_setset_set_belongs(prev_state->done, req->issuer)) + xbt_setset_set_insert(prev_state->interleave, req->issuer); + else + DEBUG1("Process %p is in done set", req->issuer); + + break; } } - if(xbt_setset_set_size(mc_current_state->interleave) > 0){ + if (xbt_setset_set_size(state->interleave) > 0) { /* We found a back-tracking point, let's loop */ - xbt_fifo_unshift(mc_stack, mc_current_state); + xbt_fifo_unshift(mc_stack, state); DEBUG1("Back-tracking to depth %d", xbt_fifo_size(mc_stack)); - MC_replay(mc_stack); MC_UNSET_RAW_MEM; + MC_replay(mc_stack); break; - }else{ - MC_state_delete(mc_current_state); - } + } else { + MC_state_delete(state); + } } + MC_UNSET_RAW_MEM; } } - DEBUG0("We are done"); - /* We are done, show the statistics and return */ - MC_print_statistics(mc_stats); -} \ No newline at end of file + MC_UNSET_RAW_MEM; + return; +}