/********************************************************************** The OPTYap Prolog system OPTYap extends the Yap Prolog system to support or-parallel tabling Copyright: R. Rocha and NCC - University of Porto, Portugal File: opt.init.c version: $Id: opt.init.c,v 1.16 2008-04-11 16:26:18 ricroc Exp $ **********************************************************************/ /* ------------------ ** ** Includes ** ** ------------------ */ #include "Yap.h" #if defined(YAPOR) || defined(TABLING) #define OPT_MAVAR_STATIC #include "Yatom.h" #include "YapHeap.h" #include #include #ifdef YAPOR #include "or.macros.h" #endif /* YAPOR */ #ifdef TABLING #include "tab.macros.h" #endif /* TABLING */ #if defined(TABLING) || !defined(ACOW) #ifndef TABLING #include "opt.mavar.h" #endif /* !TABLING */ #ifdef MULTI_ASSIGNMENT_VARIABLES ma_hash_entry Yap_ma_hash_table[MAVARS_HASH_SIZE]; UInt Yap_timestamp; /* an unsigned int */ ma_h_inner_struct *Yap_ma_h_top; #endif /* MULTI_ASSIGNMENT_VARIABLES */ #endif /* TABLING || !ACOW */ #ifdef ACOW #include "sys/wait.h" #endif /* ACOW */ /* ---------------------- ** ** Local macros ** ** ---------------------- */ #ifdef SHM_MEMORY_ALLOC_SCHEME #define STRUCTS_PER_PAGE(STR_TYPE) ((Yap_page_size - STRUCT_SIZE(struct page_header)) / STRUCT_SIZE(STR_TYPE)) #define INIT_PAGES(PG, STR_TYPE) \ INIT_LOCK(Pg_lock(PG)); \ Pg_pg_alloc(PG) = 0; \ Pg_str_in_use(PG) = 0; \ Pg_str_per_pg(PG) = STRUCTS_PER_PAGE(STR_TYPE); \ Pg_free_pg(PG) = NULL #else #define INIT_PAGES(PG, STR_TYPE) Pg_str_in_use(PG) = 0 #endif /* SHM_MEMORY_ALLOC_SCHEME */ /* -------------------------- ** ** Global functions ** ** -------------------------- */ void Yap_init_global(int max_table_size, int n_workers, int sch_loop, int delay_load) { int i; /* global data related to memory management */ #ifdef LIMIT_TABLING if (max_table_size) GLOBAL_MAX_PAGES = ((max_table_size - 1) * 1024 * 1024 / SHMMAX + 1) * SHMMAX / Yap_page_size; else GLOBAL_MAX_PAGES = -1; #endif /* LIMIT_TABLING */ INIT_PAGES(GLOBAL_PAGES_void, void *); #ifdef YAPOR INIT_PAGES(GLOBAL_PAGES_or_fr, struct or_frame); INIT_PAGES(GLOBAL_PAGES_qg_sol_fr, struct query_goal_solution_frame); INIT_PAGES(GLOBAL_PAGES_qg_ans_fr, struct query_goal_answer_frame); #endif /* YAPOR */ #ifdef TABLING_INNER_CUTS INIT_PAGES(GLOBAL_PAGES_tg_sol_fr, struct table_subgoal_solution_frame); INIT_PAGES(GLOBAL_PAGES_tg_ans_fr, struct table_subgoal_answer_frame); #endif /* TABLING_INNER_CUTS */ #ifdef TABLING #ifdef GLOBAL_TRIE INIT_PAGES(GLOBAL_PAGES_gt_node, struct global_trie_node); INIT_PAGES(GLOBAL_PAGES_gt_hash, struct global_trie_hash); #endif /* GLOBAL_TRIE */ INIT_PAGES(GLOBAL_PAGES_tab_ent, struct table_entry); INIT_PAGES(GLOBAL_PAGES_sg_fr, struct subgoal_frame); INIT_PAGES(GLOBAL_PAGES_sg_node, struct subgoal_trie_node); INIT_PAGES(GLOBAL_PAGES_ans_node, struct answer_trie_node); INIT_PAGES(GLOBAL_PAGES_sg_hash, struct subgoal_trie_hash); INIT_PAGES(GLOBAL_PAGES_ans_hash, struct answer_trie_hash); INIT_PAGES(GLOBAL_PAGES_dep_fr, struct dependency_frame); #endif /* TABLING */ #if defined(YAPOR) && defined(TABLING) INIT_PAGES(GLOBAL_PAGES_susp_fr, struct suspension_frame); #endif /* YAPOR && TABLING */ #ifdef YAPOR /* global static data */ number_workers = n_workers; worker_pid(0) = getpid(); for (i = 1; i < number_workers; i++) worker_pid(i) = 0; SCHEDULER_LOOP = sch_loop; DELAYED_RELEASE_LOAD = delay_load; /* global data related to or-performance */ GLOBAL_number_goals = 0; GLOBAL_best_times(0) = 0; GLOBAL_performance_mode = PERFORMANCE_OFF; /* global data related to or-parallelism */ BITMAP_clear(GLOBAL_bm_present_workers); for (i = 0; i < number_workers; i++) BITMAP_insert(GLOBAL_bm_present_workers, i); BITMAP_copy(GLOBAL_bm_idle_workers, GLOBAL_bm_present_workers); BITMAP_clear(GLOBAL_bm_root_cp_workers); BITMAP_clear(GLOBAL_bm_invisible_workers); BITMAP_clear(GLOBAL_bm_requestable_workers); BITMAP_clear(GLOBAL_bm_executing_workers); BITMAP_copy(GLOBAL_bm_finished_workers, GLOBAL_bm_present_workers); INIT_LOCK(GLOBAL_LOCKS_bm_idle_workers); INIT_LOCK(GLOBAL_LOCKS_bm_root_cp_workers); INIT_LOCK(GLOBAL_LOCKS_bm_invisible_workers); INIT_LOCK(GLOBAL_LOCKS_bm_requestable_workers); INIT_LOCK(GLOBAL_LOCKS_bm_executing_workers); INIT_LOCK(GLOBAL_LOCKS_bm_finished_workers); #ifdef TABLING_INNER_CUTS INIT_LOCK(GLOBAL_LOCKS_bm_pruning_workers); #endif /* TABLING_INNER_CUTS */ GLOBAL_LOCKS_who_locked_heap = MAX_WORKERS; INIT_LOCK(GLOBAL_LOCKS_heap_access); INIT_LOCK(GLOBAL_LOCKS_alloc_block); #if defined(YAPOR_ERRORS) || defined(TABLING_ERRORS) INIT_LOCK(GLOBAL_LOCKS_stderr_messages); #endif /* YAPOR_ERRORS || TABLING_ERRORS */ if (number_workers == 1) PARALLEL_EXECUTION_MODE = FALSE; else PARALLEL_EXECUTION_MODE = TRUE; #endif /* YAPOR */ #ifdef TABLING /* global data related to tabling */ GLOBAL_root_tab_ent = NULL; #ifdef GLOBAL_TRIE new_global_trie_node(GLOBAL_root_gt, 0, NULL, NULL, NULL); #endif /* GLOBAL_TRIE */ #ifdef LIMIT_TABLING GLOBAL_first_sg_fr = NULL; GLOBAL_last_sg_fr = NULL; GLOBAL_check_sg_fr = NULL; #endif /* LIMIT_TABLING */ GLOBAL_root_dep_fr = NULL; for (i = 0; i < MAX_TABLE_VARS; i++) { CELL *pt = GLOBAL_table_var_enumerator_addr(i); RESET_VARIABLE(pt); } #ifdef TABLE_LOCK_AT_WRITE_LEVEL for (i = 0; i < TABLE_LOCK_BUCKETS; i++) INIT_LOCK(GLOBAL_table_lock(i)); #endif /* TABLE_LOCK_AT_WRITE_LEVEL */ #endif /* TABLING */ return; } void Yap_init_local(void) { #ifdef YAPOR /* local data related to or-parallelism */ LOCAL = REMOTE + worker_id; LOCAL_top_cp = B_BASE; LOCAL_top_or_fr = GLOBAL_root_or_fr; LOCAL_load = 0; LOCAL_share_request = MAX_WORKERS; LOCAL_reply_signal = ready; #ifdef ENV_COPY INIT_LOCK(LOCAL_lock_signals); #endif /* ENV_COPY */ LOCAL_prune_request = NULL; #endif /* YAPOR */ INIT_LOCK(LOCAL_lock); #ifdef TABLING /* local data related to tabling */ LOCAL_next_free_ans_node = NULL; LOCAL_top_sg_fr = NULL; LOCAL_top_dep_fr = GLOBAL_root_dep_fr; #ifdef YAPOR LOCAL_top_cp_on_stack = B_BASE; /* ??? */ LOCAL_top_susp_or_fr = GLOBAL_root_or_fr; #endif /* YAPOR */ #endif /* TABLING */ return; } void make_root_frames(void) { #ifdef YAPOR /* root or frame */ or_fr_ptr or_fr; ALLOC_OR_FRAME(or_fr); INIT_LOCK(OrFr_lock(or_fr)); OrFr_alternative(or_fr) = NULL; BITMAP_copy(OrFr_members(or_fr), GLOBAL_bm_present_workers); OrFr_node(or_fr) = B_BASE; OrFr_nearest_livenode(or_fr) = NULL; OrFr_depth(or_fr) = 0; OrFr_pend_prune_cp(or_fr) = NULL; OrFr_nearest_leftnode(or_fr) = or_fr; OrFr_qg_solutions(or_fr) = NULL; #ifdef TABLING_INNER_CUTS OrFr_tg_solutions(or_fr) = NULL; #endif /* TABLING_INNER_CUTS */ #ifdef TABLING OrFr_owners(or_fr) = number_workers; OrFr_next_on_stack(or_fr) = NULL; OrFr_suspensions(or_fr) = NULL; OrFr_nearest_suspnode(or_fr) = or_fr; #endif /* TABLING */ OrFr_next(or_fr) = NULL; GLOBAL_root_or_fr = or_fr; #endif /* YAPOR */ #ifdef TABLING /* root dependency frame */ if (!GLOBAL_root_dep_fr) new_dependency_frame(GLOBAL_root_dep_fr, FALSE, NULL, NULL, NULL, NULL, NULL); #endif /* TABLING */ } #ifdef YAPOR void init_workers(void) { int proc; NOfThreads = number_workers; #ifdef ACOW if (number_workers > 1) { int son; son = fork(); if (son == -1) Yap_Error(FATAL_ERROR, TermNil, "fork error (init_workers)"); if (son > 0) { /* I am the father, I must stay here and wait for my children to all die */ struct sigaction sigact; GLOBAL_master_worker = getpid(); sigact.sa_handler = SIG_DFL; sigemptyset(&sigact.sa_mask); sigact.sa_flags = SA_RESTART; sigaction(SIGINT, &sigact, NULL); pause(); exit(0); } else worker_pid(0) = getpid(); } #endif /* ACOW */ for (proc = 1; proc < number_workers; proc++) { int son; son = fork(); if (son == -1) Yap_Error(FATAL_ERROR, TermNil, "fork error (init_workers)"); if (son == 0) { /* new worker */ worker_id = proc; remap_memory(); break; } else worker_pid(proc) = son; } } #endif /* YAPOR */ #endif /* YAPOR || TABLING */