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[simgrid.git] / 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 #ifdef TIME_BENCH_PER_SR
37 void smx_ctx_raw_new_sr(void);
38 #endif
39 /********************************** Simix Global ******************************/
40 typedef struct s_smx_global {
41   smx_context_factory_t context_factory;
42   xbt_dynar_t process_to_run;
43   xbt_dynar_t process_that_ran;
44   xbt_swag_t process_list;
45   xbt_swag_t process_to_destroy;
46   smx_process_t maestro_process;
47   xbt_dict_t registered_functions;
48   smx_creation_func_t create_process_function;
49   void_pfn_smxprocess_t_smxprocess_t kill_process_function;
50   void_pfn_smxprocess_t cleanup_process_function;
51   xbt_mallocator_t action_mallocator;
52   void_pfn_smxhost_t autorestart;
53
54 #ifdef TIME_BENCH_AMDAHL
55   xbt_os_timer_t timer_seq; /* used to bench the sequential and parallel parts of the simulation, if requested to */
56   xbt_os_timer_t timer_par;
57 #endif
58 } s_smx_global_t, *smx_global_t;
59
60 extern smx_global_t simix_global;
61 extern unsigned long simix_process_maxpid;
62
63 extern xbt_dict_t watched_hosts_lib;
64
65 #ifdef __cplusplus
66 extern "C" {
67 #endif
68 XBT_PUBLIC(void) SIMIX_clean(void);
69 #ifdef __cplusplus
70 }
71 #endif
72
73 /******************************** Exceptions *********************************/
74 /** @brief Ask to the provided simix process to raise the provided exception */
75 #define SMX_EXCEPTION(issuer, cat, val, msg)                            \
76   if (1) {                                                              \
77     smx_process_t _smx_throw_issuer = (issuer); /* evaluate only once */\
78     THROW_PREPARE(_smx_throw_issuer->running_ctx, (cat), (val), xbt_strdup(msg)); \
79     _smx_throw_issuer->doexception = 1;                                 \
80   } else ((void)0)
81
82 #define SMX_THROW() RETHROW
83
84 /* ******************************** File ************************************ */
85 typedef struct s_smx_file {
86   surf_file_t surf_file;
87   void* data;                   /**< @brief user data */
88 } s_smx_file_t;
89
90 /*********************************** Time ************************************/
91
92 /** @brief Timer datatype */
93 typedef struct s_smx_timer {
94   double date;
95   void* func;
96   void* args;
97 } s_smx_timer_t;
98
99 /********************************* Action *************************************/
100
101 typedef enum {
102   SIMIX_ACTION_EXECUTE,
103   SIMIX_ACTION_PARALLEL_EXECUTE,
104   SIMIX_ACTION_COMMUNICATE,
105   SIMIX_ACTION_JOIN,
106   SIMIX_ACTION_SLEEP,
107   SIMIX_ACTION_SYNCHRO,
108   SIMIX_ACTION_IO,
109   /* ****************************************************************************************** */
110   /* TUTORIAL: New API                                                                        */
111   /* ****************************************************************************************** */
112   SIMIX_ACTION_NEW_API
113 } e_smx_action_type_t;
114
115 typedef enum {
116   SIMIX_COMM_SEND,
117   SIMIX_COMM_RECEIVE,
118   SIMIX_COMM_READY,
119   SIMIX_COMM_DONE
120 } e_smx_comm_type_t;
121
122 typedef enum {
123   SIMIX_IO_OPEN,
124   SIMIX_IO_WRITE,
125   SIMIX_IO_READ,
126   SIMIX_IO_STAT
127 } e_smx_io_type_t;
128
129 /** @brief Action datatype */
130 typedef struct s_smx_action {
131
132   e_smx_action_type_t type;          /* Type of SIMIX action*/
133   e_smx_state_t state;               /* State of the action */
134   char *name;                        /* Action name if any */
135   xbt_fifo_t simcalls;               /* List of simcalls waiting for this action */
136
137   /* Data specific to each action type */
138   union {
139
140     struct {
141       smx_host_t host;                /* The host where the execution takes place */
142       surf_action_t surf_exec;        /* The Surf execution action encapsulated */
143     } execution; /* Possibly parallel execution */
144
145     struct {
146       e_smx_comm_type_t type;         /* Type of the communication (SIMIX_COMM_SEND or SIMIX_COMM_RECEIVE) */
147       smx_rdv_t rdv;                  /* Rendez-vous where the comm is queued */
148
149 #ifdef HAVE_MC
150       smx_rdv_t rdv_cpy;              /* Copy of the rendez-vous where the comm is queued, MC needs it for DPOR
151                                          (comm.rdv set to NULL when the communication is removed from the mailbox
152                                          (used as garbage collector)) */
153 #endif
154       int refcount;                   /* Number of processes involved in the cond */
155       int detached;                   /* If detached or not */
156
157       void (*clean_fun)(void*);       /* Function to clean the detached src_buf if something goes wrong */
158       int (*match_fun)(void*,void*,smx_action_t);  /* Filter function used by the other side. It is used when
159                                          looking if a given communication matches my needs. For that, myself must match the
160                                          expectations of the other side, too. See  */
161       void (*copy_data_fun) (smx_action_t, void*, size_t);
162
163       /* Surf action data */
164       surf_action_t surf_comm;        /* The Surf communication action encapsulated */
165       surf_action_t src_timeout;      /* Surf's actions to instrument the timeouts */
166       surf_action_t dst_timeout;      /* Surf's actions to instrument the timeouts */
167       smx_process_t src_proc;
168       smx_process_t dst_proc;
169       double rate;
170       double task_size;
171
172       /* Data to be transfered */
173       void *src_buff;
174       void *dst_buff;
175       size_t src_buff_size;
176       size_t *dst_buff_size;
177       unsigned copied:1;              /* whether the data were already copied */
178
179       void* src_data;                 /* User data associated to communication */
180       void* dst_data;
181     } comm;
182
183     struct {
184       smx_host_t host;                /* The host that is sleeping */
185       surf_action_t surf_sleep;       /* The Surf sleeping action encapsulated */
186     } sleep;
187
188     struct {
189       surf_action_t sleep;
190     } synchro;
191
192     struct {
193       smx_host_t host;
194       surf_action_t surf_io;
195     } io;
196
197     /* ****************************************************************************************** */
198     /* TUTORIAL: New API                                                                        */
199     /* ****************************************************************************************** */
200     struct {
201       surf_action_t surf_new_api;
202     } new_api;
203   };
204
205 #ifdef HAVE_LATENCY_BOUND_TRACKING
206   int latency_limited;
207 #endif
208
209 #ifdef HAVE_TRACING
210   char *category;                     /* simix action category for instrumentation */
211 #endif
212 } s_smx_action_t;
213
214 void SIMIX_context_mod_init(void);
215 void SIMIX_context_mod_exit(void);
216
217 #ifndef WIN32
218 XBT_PUBLIC_DATA(char sigsegv_stack[SIGSTKSZ]);
219 #endif
220
221 /* We are using the bottom of the stack to save some information, like the
222  * valgrind_stack_id. Define smx_context_usable_stack_size to give the remaining
223  * size for the stack. */
224 #ifdef HAVE_VALGRIND_VALGRIND_H
225 # define smx_context_usable_stack_size                                  \
226   (smx_context_stack_size - sizeof(unsigned int)) /* for valgrind_stack_id */
227 #else
228 # define smx_context_usable_stack_size smx_context_stack_size
229 #endif
230
231 void *SIMIX_context_stack_new(void);
232 void SIMIX_context_stack_delete(void *stack);
233
234 void SIMIX_context_set_current(smx_context_t context);
235 smx_context_t SIMIX_context_get_current(void);
236
237 /* All factories init */
238
239 void SIMIX_ctx_thread_factory_init(smx_context_factory_t *factory);
240 void SIMIX_ctx_sysv_factory_init(smx_context_factory_t *factory);
241 void SIMIX_ctx_raw_factory_init(smx_context_factory_t *factory);
242
243 /* ****************************** */
244 /* context manipulation functions */
245 /* ****************************** */
246
247 /* Scenario for the end of a context:
248  *
249  * CASE 1: death after end of the main function
250  *   the context_wrapper, called internally by the context module, calls
251  *   SIMIX_context_stop after user code stops, smx_context_stop calls user
252  *   cleanup_func if any (in context settings), add current process to trashbin
253  *   and yields back to maestro.
254  *   From time to time, maestro calls SIMIX_context_empty_trash, which destroy
255  *   all the process and context data structures, and frees the memory
256  *
257  * CASE 2: brutal death
258  *   SIMIX_process_kill (from any process) set process->iwannadie = 1 and then
259  *   schedules the process. Then the process is awaken in the middle of the
260  *   SIMIX_process_yield function, and at the end of it, it checks that
261  *   iwannadie == 1, and call SIMIX_context_stop(same than first case afterward)
262  */
263
264 /**
265  * \brief creates a new context for a user level process
266  * \param code a main function
267  * \param argc the number of arguments of the main function
268  * \param argv the vector of arguments of the main function
269  * \param cleanup_func the function to call when the context stops
270  * \param cleanup_arg the argument of the cleanup_func function
271  */
272 static XBT_INLINE smx_context_t SIMIX_context_new(xbt_main_func_t code,
273                                                   int argc, char **argv,
274                                                   void_pfn_smxprocess_t cleanup_func,
275                                                   smx_process_t simix_process)
276 {
277   if (!simix_global)
278     xbt_die("simix is not initialized, please call MSG_init first");
279   return simix_global->context_factory->create_context(code,
280                                                        argc, argv,
281                                                        cleanup_func,
282                                                        simix_process);
283 }
284
285 /**
286  * \brief destroy a context
287  * \param context the context to destroy
288  * Argument must be stopped first -- runs in maestro context
289  */
290 static XBT_INLINE void SIMIX_context_free(smx_context_t context)
291 {
292   simix_global->context_factory->free(context);
293 }
294
295 /**
296  * \brief stops the execution of a context
297  * \param context to stop
298  */
299 static XBT_INLINE void SIMIX_context_stop(smx_context_t context)
300 {
301   simix_global->context_factory->stop(context);
302 }
303
304 /**
305  \brief suspends a context and return the control back to the one which
306         scheduled it
307  \param context the context to be suspended (it must be the running one)
308  */
309 static XBT_INLINE void SIMIX_context_suspend(smx_context_t context)
310 {
311   simix_global->context_factory->suspend(context);
312 }
313
314 /**
315  \brief Executes all the processes to run (in parallel if possible).
316  */
317 static XBT_INLINE void SIMIX_context_runall(void)
318 {
319   if (!xbt_dynar_is_empty(simix_global->process_to_run)) {
320     simix_global->context_factory->runall();
321   }
322 }
323
324 /**
325  \brief returns the current running context
326  */
327 static XBT_INLINE smx_context_t SIMIX_context_self(void)
328 {
329   if (simix_global && simix_global->context_factory) {
330     return simix_global->context_factory->self();
331   }
332   return NULL;
333 }
334
335 /**
336  \brief returns the SIMIX process associated to a context
337  \param context The context
338  \return The SIMIX process
339  */
340 static XBT_INLINE smx_process_t SIMIX_context_get_process(smx_context_t context)
341 {
342   return simix_global->context_factory->get_process(context);
343 }
344
345 XBT_PUBLIC(int) SIMIX_process_get_maxpid(void);
346
347 void SIMIX_post_create_environment(void);
348
349 #endif