X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/d683520a4fa56accfe70e693d9336dd740f7bf35..07034eaa7d8fbbc23d0918c256174e5356a330d2:/src/simix/smx_context_sysv.c diff --git a/src/simix/smx_context_sysv.c b/src/simix/smx_context_sysv.c index 0638d97f35..12408c3450 100644 --- a/src/simix/smx_context_sysv.c +++ b/src/simix/smx_context_sysv.c @@ -1,282 +1,200 @@ -/* $Id$ */ +/* context_sysv - context switching with ucontextes from System V */ -/* context_sysv - implementation of context switching with ucontextes from Sys V */ +/* Copyright (c) 2009, 2010. The SimGrid Team. + * All rights reserved. */ -/* Copyright (c) 2004-2008 the SimGrid team. All right reserved */ + /* 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. */ -/* 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 "smx_context_sysv_private.h" +#include "xbt/parmap.h" +#include "simix/private.h" -#include "xbt/ex_interface.h" -#include "private.h" - -#include "context_sysv_config.h" /* loads context system definitions */ -#include "portable.h" -#include /* context relative declarations */ -#define STACK_SIZE 128*1024 /* lower this if you want to reduce the memory consumption */ #ifdef HAVE_VALGRIND_VALGRIND_H # include -#endif /* HAVE_VALGRIND_VALGRIND_H */ - -XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(smx_context); - -typedef struct s_smx_ctx_sysv { - SMX_CTX_BASE_T; - ucontext_t uc; /* the thread that execute the code */ - char stack[STACK_SIZE]; /* the thread stack size */ - smx_process_t prev; /* the previous process */ -#ifdef HAVE_VALGRIND_VALGRIND_H - unsigned int valgrind_stack_id; /* the valgrind stack id */ -#endif -} s_smx_ctx_sysv_t, *smx_ctx_sysv_t; - - -/* callback: context fetching */ -static ex_ctx_t *xbt_jcontext_ex_ctx(void); - -/* callback: termination */ -static void xbt_jcontext_ex_terminate(xbt_ex_t * e); - -static int -smx_ctx_sysv_factory_create_context(smx_process_t *smx_process, xbt_main_func_t code); - -static int smx_ctx_sysv_factory_finalize(smx_context_factory_t * factory); - -static int smx_ctx_sysv_factory_create_maestro_context(smx_process_t * maestro); - -static void smx_ctx_sysv_free(smx_process_t process); - -static void smx_ctx_sysv_kill(smx_process_t process); - -static void smx_ctx_sysv_schedule(smx_process_t process); - -static void smx_ctx_sysv_yield(void); - -static void smx_ctx_sysv_start(smx_process_t process); +#endif /* HAVE_VALGRIND_VALGRIND_H */ -static void smx_ctx_sysv_stop(int exit_code); +#ifdef _XBT_WIN32 +#include "win32_ucontext.h" +#include "win32_ucontext.c" +#else +#include "ucontext.h" +#endif -static void smx_ctx_sysv_swap(smx_process_t process); +XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context); -static void smx_ctx_sysv_schedule(smx_process_t process); +static xbt_parmap_t parmap; -static void smx_ctx_sysv_yield(void); +static smx_context_t +smx_ctx_sysv_create_context(xbt_main_func_t code, int argc, char **argv, + void_pfn_smxprocess_t cleanup_func, void* data); -static void smx_ctx_sysv_suspend(smx_process_t process); +static void smx_ctx_sysv_wrapper(smx_ctx_sysv_t context); -static void smx_ctx_sysv_resume(smx_process_t process); - -static void smx_ctx_sysv_wrapper(void); - -/* callback: context fetching */ -static ex_ctx_t *xbt_ctx_sysv_ex_ctx(void) -{ - return simix_global->current_process->context->exception; -} - -/* callback: termination */ -static void xbt_ctx_sysv_ex_terminate(xbt_ex_t * e) -{ - xbt_ex_display(e); - abort(); -} - -void SIMIX_ctx_sysv_factory_init(smx_context_factory_t * factory) +void SIMIX_ctx_sysv_factory_init(smx_context_factory_t *factory) { - *factory = xbt_new0(s_smx_context_factory_t, 1); + smx_ctx_base_factory_init(factory); - (*factory)->create_context = smx_ctx_sysv_factory_create_context; (*factory)->finalize = smx_ctx_sysv_factory_finalize; - (*factory)->create_maestro_context = smx_ctx_sysv_factory_create_maestro_context; + (*factory)->create_context = smx_ctx_sysv_create_context; + /* Do not overload that method (*factory)->finalize */ (*factory)->free = smx_ctx_sysv_free; - (*factory)->kill = smx_ctx_sysv_kill; - (*factory)->schedule = smx_ctx_sysv_schedule; - (*factory)->yield = smx_ctx_sysv_yield; - (*factory)->start = smx_ctx_sysv_start; (*factory)->stop = smx_ctx_sysv_stop; + (*factory)->suspend = smx_ctx_sysv_suspend; (*factory)->name = "smx_sysv_context_factory"; - /* context exception handlers */ - __xbt_ex_ctx = xbt_ctx_sysv_ex_ctx; - __xbt_ex_terminate = xbt_ctx_sysv_ex_terminate; + if(_surf_parallel_contexts){ +#ifdef CONTEXT_THREADS /* To use parallel ucontexts a thread pool is needed */ + parmap = xbt_parmap_new(2); + (*factory)->runall = smx_ctx_sysv_runall_parallel; + (*factory)->self = smx_ctx_sysv_self_parallel; +#else + THROW0(arg_error, 0, "No thread support for parallel context execution"); +#endif + }else{ + (*factory)->runall = smx_ctx_sysv_runall; + } +} + +int smx_ctx_sysv_factory_finalize(smx_context_factory_t *factory) +{ + if(parmap) + xbt_parmap_destroy(parmap); + return smx_ctx_base_factory_finalize(factory); } -static int smx_ctx_sysv_factory_create_maestro_context(smx_process_t *maestro) +smx_context_t +smx_ctx_sysv_create_context_sized(size_t size, xbt_main_func_t code, + int argc, char **argv, + void_pfn_smxprocess_t cleanup_func, + void *data) { - smx_ctx_sysv_t context = xbt_new0(s_smx_ctx_sysv_t, 1); - context->exception = xbt_new(ex_ctx_t, 1); - XBT_CTX_INITIALIZE(context->exception); + smx_ctx_sysv_t context = + (smx_ctx_sysv_t) smx_ctx_base_factory_create_context_sized(size, + code, + argc, + argv, + cleanup_func, + data); - (*maestro)->context = (smx_context_t) context; + /* If the user provided a function for the process then use it + otherwise is the context for maestro */ + if (code) { - return 0; + xbt_assert2(getcontext(&(context->uc)) == 0, + "Error in context saving: %d (%s)", errno, + strerror(errno)); -} + context->uc.uc_link = NULL; + + context->uc.uc_stack.ss_sp = + pth_skaddr_makecontext(context->stack, CONTEXT_STACK_SIZE); + + context->uc.uc_stack.ss_size = + pth_sksize_makecontext(context->stack, CONTEXT_STACK_SIZE); + +#ifdef HAVE_VALGRIND_VALGRIND_H + context->valgrind_stack_id = + VALGRIND_STACK_REGISTER(context->uc.uc_stack.ss_sp, + ((char *) context->uc.uc_stack.ss_sp) + + context->uc.uc_stack.ss_size); +#endif /* HAVE_VALGRIND_VALGRIND_H */ + + makecontext(&((smx_ctx_sysv_t) context)->uc, (void (*)())smx_ctx_sysv_wrapper, + sizeof(void*)/sizeof(int), context); + }else{ + maestro_context = context; + } + + return (smx_context_t) context; -static int smx_ctx_sysv_factory_finalize(smx_context_factory_t * factory) -{ - /*FIXME free(maestro_context->exception);*/ - free(*factory); - *factory = NULL; - return 0; } -static int -smx_ctx_sysv_factory_create_context(smx_process_t *smx_process, xbt_main_func_t code) +static smx_context_t +smx_ctx_sysv_create_context(xbt_main_func_t code, int argc, char **argv, + void_pfn_smxprocess_t cleanup_func, + void *data) { - VERB1("Create context %s", (*smx_process)->name); - smx_ctx_sysv_t context = xbt_new0(s_smx_ctx_sysv_t, 1); - - context->code = code; - - xbt_assert2(getcontext(&(context->uc)) == 0, - "Error in context saving: %d (%s)", errno, strerror(errno)); - context->uc.uc_link = NULL; - context->uc.uc_stack.ss_sp = - pth_skaddr_makecontext(context->stack, STACK_SIZE); - context->uc.uc_stack.ss_size = - pth_sksize_makecontext(context->stack, STACK_SIZE); -#ifdef HAVE_VALGRIND_VALGRIND_H - context->valgrind_stack_id = - VALGRIND_STACK_REGISTER(context->uc.uc_stack.ss_sp, - ((char *) context->uc.uc_stack.ss_sp) + - context->uc.uc_stack.ss_size); -#endif /* HAVE_VALGRIND_VALGRIND_H */ - - context->exception = xbt_new(ex_ctx_t, 1); - XBT_CTX_INITIALIZE(context->exception); - (*smx_process)->context = (smx_context_t)context; - (*smx_process)->iwannadie = 0; - - /* FIXME: Check what should return */ - return 1; + + return smx_ctx_sysv_create_context_sized(sizeof(s_smx_ctx_sysv_t), + code, argc, argv, cleanup_func, + data); + } -static void smx_ctx_sysv_free(smx_process_t process) +void smx_ctx_sysv_free(smx_context_t context) { - smx_ctx_sysv_t context = (smx_ctx_sysv_t)process->context; - if (context){ - if (context->exception) - free(context->exception); + if (context) { #ifdef HAVE_VALGRIND_VALGRIND_H - VALGRIND_STACK_DEREGISTER(((smx_ctx_sysv_t) context)->valgrind_stack_id); -#endif /* HAVE_VALGRIND_VALGRIND_H */ + VALGRIND_STACK_DEREGISTER(((smx_ctx_sysv_t) + context)->valgrind_stack_id); +#endif /* HAVE_VALGRIND_VALGRIND_H */ - /* destroy the context */ - free(context); } + smx_ctx_base_free(context); } -static void smx_ctx_sysv_kill(smx_process_t process) +void smx_ctx_sysv_stop(smx_context_t context) { - DEBUG2("Kill process '%s' (from '%s')", process->name, - simix_global->current_process->name); - process->iwannadie = 1; - smx_ctx_sysv_swap(process); + smx_ctx_base_stop(context); + smx_ctx_sysv_suspend(context); } -/** - * \param context the winner - * - * Calling this function blocks the current context and schedule \a context. - * When \a context will call xbt_context_yield, it will return - * to this function as if nothing had happened. - * - * Only the maestro can call this function to run a given process. - */ -static void smx_ctx_sysv_schedule(smx_process_t process) -{ - DEBUG1("Schedule process '%s'", process->name); - xbt_assert0((simix_global->current_process == simix_global->maestro_process), - "You are not supposed to run this function here!"); - smx_ctx_sysv_swap(process); -} +void smx_ctx_sysv_wrapper(smx_ctx_sysv_t context) +{ + (context->super.code) (context->super.argc, context->super.argv); -/** - * Calling this function makes the current context yield. The context - * that scheduled it returns from xbt_context_schedule as if nothing - * had happened. - * - * Only the processes can call this function, giving back the control - * to the maestro - */ -static void smx_ctx_sysv_yield(void) -{ - DEBUG1("Yielding process '%s'", simix_global->current_process->name); - xbt_assert0((simix_global->current_process != simix_global->maestro_process), - "You are not supposed to run this function here!"); - smx_ctx_sysv_swap(simix_global->current_process); + smx_ctx_sysv_stop((smx_context_t) context); } -static void smx_ctx_sysv_start(smx_process_t process) +void smx_ctx_sysv_suspend(smx_context_t context) { - /*DEBUG1("Start context '%s'", context->name);*/ - makecontext(&(((smx_ctx_sysv_t) process->context)->uc), smx_ctx_sysv_wrapper, 0); -} + smx_current_context = (smx_context_t)maestro_context; + int rv = swapcontext(&((smx_ctx_sysv_t) context)->uc, &((smx_ctx_sysv_t)context)->old_uc); -static void smx_ctx_sysv_stop(int exit_code) -{ - /* please no debug here: our procdata was already free'd */ - if (simix_global->current_process->cleanup_func) - ((*simix_global->current_process->cleanup_func)) (simix_global->current_process->cleanup_arg); - - smx_ctx_sysv_swap(simix_global->current_process); + xbt_assert0((rv == 0), "Context swapping failure"); } -static void smx_ctx_sysv_swap(smx_process_t process) +void smx_ctx_sysv_resume(smx_context_t context) { - DEBUG2("Swap context: '%s' -> '%s'", simix_global->current_process->name, process->name); - xbt_assert0(simix_global->current_process, "You have to call context_init() first."); - xbt_assert0(process, "Invalid argument"); - - if (((smx_ctx_sysv_t) process->context)->prev == NULL) - smx_ctx_sysv_resume(process); - else - smx_ctx_sysv_suspend(process); + smx_current_context = context; + int rv = swapcontext(&((smx_ctx_sysv_t)context)->old_uc, &((smx_ctx_sysv_t) context)->uc); - if (simix_global->current_process->iwannadie) - smx_ctx_sysv_stop(1); + xbt_assert0((rv == 0), "Context swapping failure"); } -static void smx_ctx_sysv_wrapper(void) +void smx_ctx_sysv_runall(xbt_dynar_t processes) { - smx_ctx_sysv_stop((*(simix_global->current_process->context->code)) - (simix_global->current_process->argc, simix_global->current_process->argv)); + smx_process_t process; + unsigned int cursor; + + xbt_dynar_foreach(processes, cursor, process) { + smx_ctx_sysv_resume(process->context); + } + xbt_dynar_reset(processes); } -static void smx_ctx_sysv_suspend(smx_process_t process) +void smx_ctx_sysv_resume_parallel(smx_process_t process) { - int rv; - - DEBUG1("Suspend context: '%s'", simix_global->current_process->name); - smx_process_t prev_process = ((smx_ctx_sysv_t) process->context)->prev; - - simix_global->current_process = prev_process; - - ((smx_ctx_sysv_t) process->context)->prev = NULL; - - rv = swapcontext(&(((smx_ctx_sysv_t) process->context)->uc), &(((smx_ctx_sysv_t)prev_process->context)->uc)); + smx_context_t context = process->context; + xbt_os_thread_set_extra_data(context); + int rv = swapcontext(&((smx_ctx_sysv_t)context)->old_uc, &((smx_ctx_sysv_t) context)->uc); + xbt_os_thread_set_extra_data(NULL); xbt_assert0((rv == 0), "Context swapping failure"); } -static void smx_ctx_sysv_resume(smx_process_t process) +void smx_ctx_sysv_runall_parallel(xbt_dynar_t processes) { - int rv; - smx_ctx_sysv_t new_context = (smx_ctx_sysv_t)process->context; - smx_ctx_sysv_t prev_context = (smx_ctx_sysv_t)simix_global->current_process->context; - - DEBUG2("Resume context: '%s' (from '%s')", process->name, - simix_global->current_process->name); - - ((smx_ctx_sysv_t) process->context)->prev = simix_global->current_process; - - simix_global->current_process = process; - - rv = swapcontext(&prev_context->uc, &new_context->uc); + xbt_parmap_apply(parmap, (void_f_pvoid_t)smx_ctx_sysv_resume_parallel, processes); + xbt_dynar_reset(processes); +} - xbt_assert0((rv == 0), "Context swapping failure"); +smx_context_t smx_ctx_sysv_self_parallel(void) +{ + smx_context_t self_context = (smx_context_t) xbt_os_thread_get_extra_data(); + return self_context ? self_context : (smx_context_t) maestro_context; }