src/simix/smx_private.h

   1 /* Copyright (c) 2007-2010, 2012-2014. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #ifndef _SIMIX_PRIVATE_H
   8 #define _SIMIX_PRIVATE_H
   9
  10 #include "simgrid/simix.h"
  11 #include "surf/surf.h"
  12 #include "xbt/fifo.h"
  13 #include "xbt/swag.h"
  14 #include "xbt/dict.h"
  15 #include "xbt/mallocator.h"
  16 #include "xbt/config.h"
  17 #include "xbt/xbt_os_time.h"
  18 #include "xbt/function_types.h"
  19 #include "xbt/ex_interface.h"
  20 #include "instr/instr_private.h"
  21 #include "smx_process_private.h"
  22 #include "smx_host_private.h"
  23 #include "smx_io_private.h"
  24 #include "smx_network_private.h"
  25 #include "smx_smurf_private.h"
  26 #include "smx_synchro_private.h"
  27 /* ****************************************************************************************** */
  28 /* TUTORIAL: New API                                                                        */
  29 /* ****************************************************************************************** */
  30 #include "smx_new_api_private.h"
  31
  32 /* Define only for SimGrid benchmarking purposes */
  33 //#define TIME_BENCH_PER_SR /* this aims at measuring the time spent in each scheduling round per each thread. The code is thus run in sequential to bench separately each SSR */
  34 //#define TIME_BENCH_AMDAHL /* this aims at measuring the porting of time that could be parallelized at maximum (to get the optimal speedup by applying the amdahl law). */
  35
  36 /********************************** Simix Global ******************************/
  37 typedef struct s_smx_global {
  38   smx_context_factory_t context_factory;
  39   xbt_dynar_t process_to_run;
  40   xbt_dynar_t process_that_ran;
  41   xbt_swag_t process_list;
  42   xbt_swag_t process_to_destroy;
  43   smx_process_t maestro_process;
  44   xbt_dict_t registered_functions;
  45   smx_creation_func_t create_process_function;
  46   void_pfn_smxprocess_t_smxprocess_t kill_process_function;
  47   void_pfn_smxprocess_t cleanup_process_function;
  48   xbt_mallocator_t action_mallocator;
  49   void_pfn_smxhost_t autorestart;
  50
  51 #ifdef TIME_BENCH_AMDAHL
  52   xbt_os_timer_t timer_seq; /* used to bench the sequential and parallel parts of the simulation, if requested to */
  53   xbt_os_timer_t timer_par;
  54 #endif
  55 } s_smx_global_t, *smx_global_t;
  56
  57 extern smx_global_t simix_global;
  58 extern unsigned long simix_process_maxpid;
  59
  60 extern xbt_dict_t watched_hosts_lib;
  61
  62 #ifdef __cplusplus
  63 extern "C" {
  64 #endif
  65 XBT_PUBLIC(void) SIMIX_clean(void);
  66 #ifdef __cplusplus
  67 }
  68 #endif
  69
  70 /******************************** Exceptions *********************************/
  71
  72 #define SMX_EXCEPTION(issuer, c, v, m)                                  \
  73   if (1) {                                                              \
  74     smx_process_t _smx_throw_issuer = (issuer);                         \
  75     THROW_PREPARE(_smx_throw_issuer->running_ctx, (c), (v), xbt_strdup(m)); \
  76     _smx_throw_issuer->doexception = 1;                                 \
  77   } else ((void)0)
  78
  79 #define SMX_THROW() RETHROW
  80
  81 /* ******************************** File ************************************ */
  82 typedef struct s_smx_file {
  83   surf_file_t surf_file;
  84   void* data;                   /**< @brief user data */
  85 } s_smx_file_t;
  86
  87 /*********************************** Time ************************************/
  88
  89 /** @brief Timer datatype */
  90 typedef struct s_smx_timer {
  91   double date;
  92   void* func;
  93   void* args;
  94 } s_smx_timer_t;
  95
  96 /********************************* Action *************************************/
  97
  98 typedef enum {
  99   SIMIX_ACTION_EXECUTE,
 100   SIMIX_ACTION_PARALLEL_EXECUTE,
 101   SIMIX_ACTION_COMMUNICATE,
 102   SIMIX_ACTION_JOIN,
 103   SIMIX_ACTION_SLEEP,
 104   SIMIX_ACTION_SYNCHRO,
 105   SIMIX_ACTION_IO,
 106   /* ****************************************************************************************** */
 107   /* TUTORIAL: New API                                                                        */
 108   /* ****************************************************************************************** */
 109   SIMIX_ACTION_NEW_API
 110 } e_smx_action_type_t;
 111
 112 typedef enum {
 113   SIMIX_COMM_SEND,
 114   SIMIX_COMM_RECEIVE,
 115   SIMIX_COMM_READY,
 116   SIMIX_COMM_DONE
 117 } e_smx_comm_type_t;
 118
 119 typedef enum {
 120   SIMIX_IO_OPEN,
 121   SIMIX_IO_WRITE,
 122   SIMIX_IO_READ,
 123   SIMIX_IO_STAT
 124 } e_smx_io_type_t;
 125
 126 /** @brief Action datatype */
 127 typedef struct s_smx_action {
 128
 129   e_smx_action_type_t type;          /* Type of SIMIX action*/
 130   e_smx_state_t state;               /* State of the action */
 131   char *name;                        /* Action name if any */
 132   xbt_fifo_t simcalls;               /* List of simcalls waiting for this action */
 133
 134   /* Data specific to each action type */
 135   union {
 136
 137     struct {
 138       smx_host_t host;                /* The host where the execution takes place */
 139       surf_action_t surf_exec;        /* The Surf execution action encapsulated */
 140     } execution; /* Possibly parallel execution */
 141
 142     struct {
 143       e_smx_comm_type_t type;         /* Type of the communication (SIMIX_COMM_SEND or SIMIX_COMM_RECEIVE) */
 144       smx_rdv_t rdv;                  /* Rendez-vous where the comm is queued */
 145
 146 #ifdef HAVE_MC
 147       smx_rdv_t rdv_cpy;              /* Copy of the rendez-vous where the comm is queued, MC needs it for DPOR
 148                                          (comm.rdv set to NULL when the communication is removed from the mailbox
 149                                          (used as garbage collector)) */
 150 #endif
 151       int refcount;                   /* Number of processes involved in the cond */
 152       int detached;                   /* If detached or not */
 153
 154       void (*clean_fun)(void*);       /* Function to clean the detached src_buf if something goes wrong */
 155       int (*match_fun)(void*,void*,smx_action_t);  /* Filter function used by the other side. It is used when
 156                                          looking if a given communication matches my needs. For that, myself must match the
 157                                          expectations of the other side, too. See  */
 158
 159       /* Surf action data */
 160       surf_action_t surf_comm;        /* The Surf communication action encapsulated */
 161       surf_action_t src_timeout;      /* Surf's actions to instrument the timeouts */
 162       surf_action_t dst_timeout;      /* Surf's actions to instrument the timeouts */
 163       smx_process_t src_proc;
 164       smx_process_t dst_proc;
 165       double rate;
 166       double task_size;
 167
 168       /* Data to be transfered */
 169       void *src_buff;
 170       void *dst_buff;
 171       size_t src_buff_size;
 172       size_t *dst_buff_size;
 173       unsigned copied:1;              /* whether the data were already copied */
 174
 175       void* src_data;                 /* User data associated to communication */
 176       void* dst_data;
 177     } comm;
 178
 179     struct {
 180       smx_host_t host;                /* The host that is sleeping */
 181       surf_action_t surf_sleep;       /* The Surf sleeping action encapsulated */
 182     } sleep;
 183
 184     struct {
 185       surf_action_t sleep;
 186     } synchro;
 187
 188     struct {
 189       smx_host_t host;
 190       surf_action_t surf_io;
 191     } io;
 192
 193     /* ****************************************************************************************** */
 194     /* TUTORIAL: New API                                                                        */
 195     /* ****************************************************************************************** */
 196     struct {
 197       surf_action_t surf_new_api;
 198     } new_api;
 199   };
 200
 201 #ifdef HAVE_LATENCY_BOUND_TRACKING
 202   int latency_limited;
 203 #endif
 204
 205 #ifdef HAVE_TRACING
 206   char *category;                     /* simix action category for instrumentation */
 207 #endif
 208 } s_smx_action_t;
 209
 210 void SIMIX_context_mod_init(void);
 211 void SIMIX_context_mod_exit(void);
 212
 213 #ifndef WIN32
 214 XBT_PUBLIC_DATA(char sigsegv_stack[SIGSTKSZ]);
 215 #endif
 216
 217 /* We are using the bottom of the stack to save some information, like the
 218  * valgrind_stack_id. Define smx_context_usable_stack_size to give the remaining
 219  * size for the stack. */
 220 #ifdef HAVE_VALGRIND_VALGRIND_H
 221 # define smx_context_usable_stack_size                                  \
 222   (smx_context_stack_size - sizeof(unsigned int)) /* for valgrind_stack_id */
 223 #else
 224 # define smx_context_usable_stack_size smx_context_stack_size
 225 #endif
 226
 227 void *SIMIX_context_stack_new(void);
 228 void SIMIX_context_stack_delete(void *stack);
 229
 230 void SIMIX_context_set_current(smx_context_t context);
 231 smx_context_t SIMIX_context_get_current(void);
 232
 233 /* All factories init */
 234
 235 void SIMIX_ctx_thread_factory_init(smx_context_factory_t *factory);
 236 void SIMIX_ctx_sysv_factory_init(smx_context_factory_t *factory);
 237 void SIMIX_ctx_raw_factory_init(smx_context_factory_t *factory);
 238
 239 /* ****************************** */
 240 /* context manipulation functions */
 241 /* ****************************** */
 242
 243 /* Scenario for the end of a context:
 244  *
 245  * CASE 1: death after end of the main function
 246  *   the context_wrapper, called internally by the context module, calls
 247  *   SIMIX_context_stop after user code stops, smx_context_stop calls user
 248  *   cleanup_func if any (in context settings), add current process to trashbin
 249  *   and yields back to maestro.
 250  *   From time to time, maestro calls SIMIX_context_empty_trash, which destroy
 251  *   all the process and context data structures, and frees the memory
 252  *
 253  * CASE 2: brutal death
 254  *   SIMIX_process_kill (from any process) set process->iwannadie = 1 and then
 255  *   schedules the process. Then the process is awaken in the middle of the
 256  *   SIMIX_process_yield function, and at the end of it, it checks that
 257  *   iwannadie == 1, and call SIMIX_context_stop(same than first case afterward)
 258  */
 259
 260 /**
 261  * \brief creates a new context for a user level process
 262  * \param code a main function
 263  * \param argc the number of arguments of the main function
 264  * \param argv the vector of arguments of the main function
 265  * \param cleanup_func the function to call when the context stops
 266  * \param cleanup_arg the argument of the cleanup_func function
 267  */
 268 static XBT_INLINE smx_context_t SIMIX_context_new(xbt_main_func_t code,
 269                                                   int argc, char **argv,
 270                                                   void_pfn_smxprocess_t cleanup_func,
 271                                                   smx_process_t simix_process)
 272 {
 273   if (!simix_global)
 274     xbt_die("simix is not initialized, please call MSG_init first");
 275   return simix_global->context_factory->create_context(code,
 276                                                        argc, argv,
 277                                                        cleanup_func,
 278                                                        simix_process);
 279 }
 280
 281 /**
 282  * \brief destroy a context
 283  * \param context the context to destroy
 284  * Argument must be stopped first -- runs in maestro context
 285  */
 286 static XBT_INLINE void SIMIX_context_free(smx_context_t context)
 287 {
 288   simix_global->context_factory->free(context);
 289 }
 290
 291 /**
 292  * \brief stops the execution of a context
 293  * \param context to stop
 294  */
 295 static XBT_INLINE void SIMIX_context_stop(smx_context_t context)
 296 {
 297   simix_global->context_factory->stop(context);
 298 }
 299
 300 /**
 301  \brief suspends a context and return the control back to the one which
 302         scheduled it
 303  \param context the context to be suspended (it must be the running one)
 304  */
 305 static XBT_INLINE void SIMIX_context_suspend(smx_context_t context)
 306 {
 307   simix_global->context_factory->suspend(context);
 308 }
 309
 310 /**
 311  \brief Executes all the processes to run (in parallel if possible).
 312  */
 313 static XBT_INLINE void SIMIX_context_runall(void)
 314 {
 315   if (!xbt_dynar_is_empty(simix_global->process_to_run)) {
 316     simix_global->context_factory->runall();
 317   }
 318 }
 319
 320 /**
 321  \brief returns the current running context
 322  */
 323 static XBT_INLINE smx_context_t SIMIX_context_self(void)
 324 {
 325   if (simix_global && simix_global->context_factory) {
 326     return simix_global->context_factory->self();
 327   }
 328   return NULL;
 329 }
 330
 331 /**
 332  \brief returns the SIMIX process associated to a context
 333  \param context The context
 334  \return The SIMIX process
 335  */
 336 static XBT_INLINE smx_process_t SIMIX_context_get_process(smx_context_t context)
 337 {
 338   return simix_global->context_factory->get_process(context);
 339 }
 340
 341 XBT_PUBLIC(int) SIMIX_process_get_maxpid(void);
 342
 343 void SIMIX_post_create_environment(void);
 344
 345 #endif