1 /* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010. The SimGrid Team.
2 * All rights reserved. */
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. */
11 #include "xbt/dynar.h"
14 #include "xbt/file_stat.h"
16 #include "xbt/config.h"
17 #include "surf/datatypes.h"
19 #include "surf/surf_routing.h"
20 #include "simgrid/platf_interface.h"
23 /* Actions and models are highly connected structures... */
26 SURF_NETWORK_ELEMENT_NULL = 0, /* NULL */
27 SURF_NETWORK_ELEMENT_HOST, /* host type */
28 SURF_NETWORK_ELEMENT_ROUTER, /* router type */
29 SURF_NETWORK_ELEMENT_AS /* AS type */
30 } e_surf_network_element_type_t;
32 XBT_PUBLIC(e_surf_network_element_type_t)
33 routing_get_network_element_type(const char* name);
35 /** @Brief Specify that we use that action */
36 XBT_PUBLIC(void) surf_action_ref(surf_action_t action);
38 /** @brief Creates a new action.
40 * @param size The size is the one of the subtype you want to create
41 * @param cost initial value
42 * @param model to which model we should attach this action
43 * @param failed whether we should start this action in failed mode
45 XBT_PUBLIC(void *) surf_action_new(size_t size, double cost,
46 surf_model_t model, int failed);
48 /** \brief Resource model description
50 typedef struct surf_model_description {
52 const char *description;
53 void_f_void_t model_init_preparse;
54 } s_surf_model_description_t, *surf_model_description_t;
56 XBT_PUBLIC(int) find_model_description(s_surf_model_description_t * table,
58 XBT_PUBLIC(void) model_help(const char *category,
59 s_surf_model_description_t * table);
61 enum heap_action_type{
68 /** \ingroup SURF_actions
69 * \brief Action structure
71 * Never create s_surf_action_t by yourself ! The actions are created
72 * on the fly when you call execute or communicate on a model.
74 * \see e_surf_action_state_t
76 typedef struct surf_action {
77 s_xbt_swag_hookup_t state_hookup;
79 double cost; /**< cost */
80 double priority; /**< priority (1.0 by default) */
81 double max_duration; /**< max_duration (may fluctuate until
82 the task is completed) */
83 double remains; /**< How much of that cost remains to
84 * be done in the currently running task */
85 #ifdef HAVE_LATENCY_BOUND_TRACKING
86 int latency_limited; /**< Set to 1 if is limited by latency, 0 otherwise */
89 double start; /**< start time */
90 double finish; /**< finish time : this is modified during the run
91 * and fluctuates until the task is completed */
92 void *data; /**< for your convenience */
94 surf_model_t model_type;
96 char *category; /**< tracing category for categorized resource utilization monitoring */
98 surf_file_t file; /**< surf_file_t for storage model */
99 s_file_stat_t stat; /**< surf_file_t for storage model */
102 typedef struct surf_action_lmm {
103 s_surf_action_t generic_action;
104 lmm_variable_t variable;
106 s_xbt_swag_hookup_t action_list_hookup;
110 enum heap_action_type hat;
111 } s_surf_action_lmm_t, *surf_action_lmm_t;
113 /** \ingroup SURF_actions
114 * \brief Action states
118 * \see surf_action_t, surf_action_state_t
121 SURF_ACTION_READY = 0, /**< Ready */
122 SURF_ACTION_RUNNING, /**< Running */
123 SURF_ACTION_FAILED, /**< Task Failure */
124 SURF_ACTION_DONE, /**< Completed */
125 SURF_ACTION_TO_FREE, /**< Action to free in next cleanup */
126 SURF_ACTION_NOT_IN_THE_SYSTEM
127 /**< Not in the system anymore. Why did you ask ? */
128 } e_surf_action_state_t;
130 /** \ingroup SURF_actions
131 * \brief Action state sets
133 * This structure contains some sets of actions.
134 * It provides a fast access to the actions in each state.
136 * \see surf_action_t, e_surf_action_state_t
138 typedef struct surf_action_state {
139 xbt_swag_t ready_action_set;
140 /**< Actions in state SURF_ACTION_READY */
141 xbt_swag_t running_action_set;
142 /**< Actions in state SURF_ACTION_RUNNING */
143 xbt_swag_t failed_action_set;
144 /**< Actions in state SURF_ACTION_FAILED */
145 xbt_swag_t done_action_set;
146 /**< Actions in state SURF_ACTION_DONE */
147 } s_surf_action_state_t, *surf_action_state_t;
149 /***************************/
150 /* Generic model object */
151 /***************************/
152 typedef struct s_routing_platf s_routing_platf_t, *routing_platf_t;
153 XBT_PUBLIC_DATA(routing_platf_t) routing_platf;
156 /** \ingroup SURF_models
157 * \brief Private data available on all models
159 typedef struct surf_model_private *surf_model_private_t;
163 /** \ingroup SURF_models
164 * \brief CPU model extension public
166 * Public functions specific to the CPU model.
168 typedef struct surf_cpu_model_extension_public {
169 surf_action_t(*execute) (void *cpu, double size);
170 surf_action_t(*sleep) (void *cpu, double duration);
171 e_surf_resource_state_t(*get_state) (void *cpu);
172 double (*get_speed) (void *cpu, double load);
173 double (*get_available_speed) (void *cpu);
174 void* (*create_resource) (const char *name, double power_peak,
176 tmgr_trace_t power_trace,
178 e_surf_resource_state_t state_initial,
179 tmgr_trace_t state_trace,
180 xbt_dict_t cpu_properties);
181 void (*add_traces) (void);
182 } s_surf_model_extension_cpu_t;
186 /** \ingroup SURF_models
187 * \brief Network model extension public
189 * Public functions specific to the network model
191 typedef struct surf_network_model_extension_public {
192 surf_action_t (*communicate) (sg_routing_edge_t src,
193 sg_routing_edge_t dst,
194 double size, double rate);
195 xbt_dynar_t(*get_route) (void *src, void *dst); //FIXME: kill field? That is done by the routing nowadays
196 double (*get_link_bandwidth) (const void *link);
197 double (*get_link_latency) (const void *link);
198 int (*link_shared) (const void *link);
199 void (*add_traces) (void);
200 void* (*create_resource) (const char *name,
202 tmgr_trace_t bw_trace,
204 tmgr_trace_t lat_trace,
205 e_surf_resource_state_t
207 tmgr_trace_t state_trace,
208 e_surf_link_sharing_policy_t policy,
209 xbt_dict_t properties);
210 } s_surf_model_extension_network_t;
214 /** \ingroup SURF_models
215 * \brief Storage model extension public
217 * Public functions specific to the Storage model.
220 typedef struct surf_storage_model_extension_public {
221 surf_action_t(*open) (void *storage, const char* path, const char* mode);
222 surf_action_t(*close) (void *storage, surf_file_t fp);
223 surf_action_t(*read) (void *storage, void* ptr, size_t size, size_t nmemb, surf_file_t stream);
224 surf_action_t(*write) (void *storage, const void* ptr, size_t size, size_t nmemb, surf_file_t stream);
225 surf_action_t(*stat) (void *storage, surf_file_t stream);
226 void* (*create_resource) (const char* id, const char* model,const char* type_id);
227 } s_surf_model_extension_storage_t;
229 /** \ingroup SURF_models
230 * \brief Workstation model extension public
232 * Public functions specific to the workstation model.
234 typedef struct surf_workstation_model_extension_public {
235 surf_action_t(*execute) (void *workstation, double size); /**< Execute a computation amount on a workstation
236 and create the corresponding action */
237 surf_action_t(*sleep) (void *workstation, double duration); /**< Make a workstation sleep during a given duration */
238 e_surf_resource_state_t(*get_state) (void *workstation); /**< Return the CPU state of a workstation */
239 double (*get_speed) (void *workstation, double load); /**< Return the speed of a workstation */
240 double (*get_available_speed) (void *workstation); /**< Return tha available speed of a workstation */
241 surf_action_t(*communicate) (void *workstation_src, /**< Execute a communication amount between two workstations */
242 void *workstation_dst, double size,
244 // FIXME: kill next field, which duplicates the routing
245 xbt_dynar_t(*get_route) (void *workstation_src, void *workstation_dst); /**< Get the list of links between two ws */
247 surf_action_t(*execute_parallel_task) (int workstation_nb, /**< Execute a parallel task on several workstations */
248 void **workstation_list,
249 double *computation_amount,
250 double *communication_amount,
252 double (*get_link_bandwidth) (const void *link); /**< Return the current bandwidth of a network link */
253 double (*get_link_latency) (const void *link); /**< Return the current latency of a network link */
254 surf_action_t(*open) (void *workstation, const char* storage, const char* path, const char* mode);
255 surf_action_t(*close) (void *workstation, const char* storage, surf_file_t fp);
256 surf_action_t(*read) (void *workstation, const char* storage, void* ptr, size_t size, size_t nmemb, surf_file_t stream);
257 surf_action_t(*write) (void *workstation, const char* storage, const void* ptr, size_t size, size_t nmemb, surf_file_t stream);
258 surf_action_t(*stat) (void *workstation, const char* storage, surf_file_t stream);
259 int (*link_shared) (const void *link);
260 xbt_dict_t(*get_properties) (const void *resource);
261 void* (*link_create_resource) (const char *name,
263 tmgr_trace_t bw_trace,
265 tmgr_trace_t lat_trace,
266 e_surf_resource_state_t
268 tmgr_trace_t state_trace,
269 e_surf_link_sharing_policy_t
270 policy, xbt_dict_t properties);
271 void* (*cpu_create_resource) (const char *name, double power_peak,
273 tmgr_trace_t power_trace,
274 e_surf_resource_state_t state_initial,
275 tmgr_trace_t state_trace,
276 xbt_dict_t cpu_properties);
277 void (*add_traces) (void);
279 } s_surf_model_extension_workstation_t;
284 /** \ingroup SURF_models
285 * \brief Model datatype
287 * Generic data structure for a model. The workstations,
288 * the CPUs and the network links are examples of models.
290 typedef struct surf_model {
291 const char *name; /**< Name of this model */
292 s_surf_action_state_t states; /**< Any living action on this model */
294 e_surf_action_state_t(*action_state_get) (surf_action_t action);
295 /**< Return the state of an action */
296 void (*action_state_set) (surf_action_t action,
297 e_surf_action_state_t state);
298 /**< Change an action state*/
300 double (*action_get_start_time) (surf_action_t action); /**< Return the start time of an action */
301 double (*action_get_finish_time) (surf_action_t action); /**< Return the finish time of an action */
302 int (*action_unref) (surf_action_t action); /**< Specify that we don't use that action anymore */
303 void (*action_cancel) (surf_action_t action); /**< Cancel a running action */
304 void (*action_recycle) (surf_action_t action); /**< Recycle an action */
305 void (*action_data_set) (surf_action_t action, void *data); /**< Set the user data of an action */
306 void (*suspend) (surf_action_t action); /**< Suspend an action */
307 void (*resume) (surf_action_t action); /**< Resume a suspended action */
308 int (*is_suspended) (surf_action_t action); /**< Return whether an action is suspended */
309 void (*set_max_duration) (surf_action_t action, double duration); /**< Set the max duration of an action*/
310 void (*set_priority) (surf_action_t action, double priority); /**< Set the priority of an action */
312 void (*set_category) (surf_action_t action, const char *category); /**< Set the category of an action */
314 double (*get_remains) (surf_action_t action); /**< Get the remains of an action */
315 #ifdef HAVE_LATENCY_BOUND_TRACKING
316 int (*get_latency_limited) (surf_action_t action); /**< Return 1 if action is limited by latency, 0 otherwise */
319 surf_model_private_t model_private;
322 s_surf_model_extension_cpu_t cpu;
323 s_surf_model_extension_network_t network;
324 s_surf_model_extension_storage_t storage;
325 s_surf_model_extension_workstation_t workstation;
329 surf_model_t surf_model_init(void);
330 void surf_model_exit(surf_model_t model);
332 static inline void *surf_cpu_resource_by_name(const char *name) {
333 return xbt_lib_get_or_null(host_lib, name, SURF_CPU_LEVEL);
335 static inline void *surf_workstation_resource_by_name(const char *name){
336 return xbt_lib_get_or_null(host_lib, name, SURF_WKS_LEVEL);
338 static inline void *surf_storage_resource_by_name(const char *name){
339 return xbt_lib_get_or_null(storage_lib, name, SURF_STORAGE_LEVEL);
342 typedef struct surf_resource {
345 xbt_dict_t properties;
346 } s_surf_resource_t, *surf_resource_t;
349 * Resource which have a metric handled by a maxmin system
354 tmgr_trace_event_t event;
357 typedef struct surf_resource_lmm {
358 s_surf_resource_t generic_resource;
359 lmm_constraint_t constraint;
360 e_surf_resource_state_t state_current;
361 tmgr_trace_event_t state_event;
362 s_surf_metric_t power;
363 } s_surf_resource_lmm_t, *surf_resource_lmm_t;
365 /**************************************/
366 /* Implementations of model object */
367 /**************************************/
370 /** \ingroup SURF_models
371 * \brief The CPU model
373 XBT_PUBLIC_DATA(surf_model_t) surf_cpu_model;
375 /** \ingroup SURF_models
376 * \brief Initializes the CPU model with the model Cas01
378 * By default, this model uses the lazy optimization mechanism that
379 * relies on partial invalidation in LMM and a heap for lazy action update.
380 * You can change this behavior by setting the cpu/optim configuration
381 * variable to a different value.
383 * This function is called by surf_workstation_model_init_CLM03
384 * so you shouldn't have to call it by yourself.
386 * \see surf_workstation_model_init_CLM03()
388 XBT_PUBLIC(void) surf_cpu_model_init_Cas01(void);
390 /** \ingroup SURF_models
391 * \brief Initializes the CPU model with trace integration [Deprecated]
393 * You shouldn't have to call it by yourself.
394 * \see surf_workstation_model_init_CLM03()
396 XBT_PUBLIC(void) surf_cpu_model_init_ti(void);
398 /** \brief This function call the share resources function needed
401 XBT_PUBLIC(double) generic_share_resources(double now);
403 /** \brief This function call the update action state function needed
406 XBT_PUBLIC(void) generic_update_actions_state(double now, double delta);
408 /** \ingroup SURF_models
409 * \brief The list of all available optimization modes (both for cpu and networks).
410 * These optimization modes can be set using --cfg=cpu/optim:... and --cfg=network/optim:...
412 XBT_PUBLIC_DATA(s_surf_model_description_t) surf_optimization_mode_description[];
414 /** \ingroup SURF_models
415 * \brief The list of all available cpu model models
417 XBT_PUBLIC_DATA(s_surf_model_description_t) surf_cpu_model_description[];
419 XBT_PUBLIC(void) create_workstations(void);
421 /**\brief create new host bypass the parser
426 /** \ingroup SURF_models
427 * \brief The network model
429 * When creating a new API on top on SURF, you shouldn't use the
430 * network model unless you know what you are doing. Only the workstation
431 * model should be accessed because depending on the platform model,
432 * the network model can be NULL.
434 XBT_PUBLIC_DATA(surf_model_t) surf_network_model;
436 /** \ingroup SURF_models
437 * \brief Same as network model 'LagrangeVelho', only with different correction factors.
439 * This model is proposed by Pierre-Nicolas Clauss and Martin Quinson and Stéphane Génaud
440 * based on the model 'LV08' and different correction factors depending on the communication
441 * size (< 1KiB, < 64KiB, >= 64KiB).
442 * See comments in the code for more information.
444 * \see surf_workstation_model_init_SMPI()
446 XBT_PUBLIC(void) surf_network_model_init_SMPI(void);
448 /** \ingroup SURF_models
449 * \brief Initializes the platform with the network model 'LegrandVelho'
451 * This model is proposed by Arnaud Legrand and Pedro Velho based on
452 * the results obtained with the GTNets simulator for onelink and
453 * dogbone sharing scenarios. See comments in the code for more information.
455 * \see surf_workstation_model_init_LegrandVelho()
457 XBT_PUBLIC(void) surf_network_model_init_LegrandVelho(void);
459 /** \ingroup SURF_models
460 * \brief Initializes the platform with the network model 'Constant'
462 * In this model, the communication time between two network cards is
463 * constant, hence no need for a routing table. This is particularly
464 * usefull when simulating huge distributed algorithms where
465 * scalability is really an issue. This function is called in
466 * conjunction with surf_workstation_model_init_compound.
468 * \see surf_workstation_model_init_compound()
470 XBT_PUBLIC(void) surf_network_model_init_Constant(void);
472 /** \ingroup SURF_models
473 * \brief Initializes the platform with the network model CM02
475 * This function is called by surf_workstation_model_init_CLM03
476 * or by yourself only if you plan using surf_workstation_model_init_compound
477 * See comments in the code for more information.
479 * \see surf_workstation_model_init_CLM03()
481 XBT_PUBLIC(void) surf_network_model_init_CM02(void);
484 * brief initialize the the network model bypassing the XML parser
486 XBT_PUBLIC(void) surf_network_model_init_bypass(const char *id,
491 /** \ingroup SURF_models
492 * \brief Initializes the platform with the network model GTNETS
493 * \param filename XML platform file name
495 * This function is called by surf_workstation_model_init_GTNETS
496 * or by yourself only if you plan using surf_workstation_model_init_compound
498 * \see surf_workstation_model_init_GTNETS()
500 XBT_PUBLIC(void) surf_network_model_init_GTNETS(void);
504 /** \ingroup SURF_models
505 * \brief Initializes the platform with the network model NS3
506 * \param filename XML platform file name
508 * This function is called by surf_workstation_model_init_NS3
509 * or by yourself only if you plan using surf_workstation_model_init_compound
511 * \see surf_workstation_model_init_NS3()
513 XBT_PUBLIC(void) surf_network_model_init_NS3(void);
516 /** \ingroup SURF_models
517 * \brief Initializes the platform with the network model Reno
518 * \param filename XML platform file name
520 * The problem is related to max( sum( arctan(C * Df * xi) ) ).
523 * [LOW03] S. H. Low. A duality model of TCP and queue management algorithms.
524 * IEEE/ACM Transaction on Networking, 11(4):525-536, 2003.
526 * Call this function only if you plan using surf_workstation_model_init_compound.
529 XBT_PUBLIC(void) surf_network_model_init_Reno(void);
531 /** \ingroup SURF_models
532 * \brief Initializes the platform with the network model Reno2
533 * \param filename XML platform file name
535 * The problem is related to max( sum( arctan(C * Df * xi) ) ).
538 * [LOW01] S. H. Low. A duality model of TCP and queue management algorithms.
539 * IEEE/ACM Transaction on Networking, 11(4):525-536, 2003.
541 * Call this function only if you plan using surf_workstation_model_init_compound.
544 XBT_PUBLIC(void) surf_network_model_init_Reno2(void);
546 /** \ingroup SURF_models
547 * \brief Initializes the platform with the network model Vegas
548 * \param filename XML platform file name
550 * This problem is related to max( sum( a * Df * ln(xi) ) ) which is equivalent
551 * to the proportional fairness.
554 * [LOW03] S. H. Low. A duality model of TCP and queue management algorithms.
555 * IEEE/ACM Transaction on Networking, 11(4):525-536, 2003.
557 * Call this function only if you plan using surf_workstation_model_init_compound.
560 XBT_PUBLIC(void) surf_network_model_init_Vegas(void);
562 /** \ingroup SURF_models
563 * \brief The list of all available network model models
565 XBT_PUBLIC_DATA(s_surf_model_description_t)
566 surf_network_model_description[];
573 /** \ingroup SURF_models
574 * \brief The storage model
576 XBT_PUBLIC(void) surf_storage_model_init_default(void);
578 /** \ingroup SURF_models
579 * \brief The list of all available storage modes.
580 * This storage mode can be set using --cfg=storage/model:...
582 XBT_PUBLIC_DATA(s_surf_model_description_t) surf_storage_model_description[];
590 /** \ingroup SURF_models
591 * \brief The workstation model
593 * Note that when you create an API on top of SURF,
594 * the workstation model should be the only one you use
595 * because depending on the platform model, the network model and the CPU model
598 XBT_PUBLIC_DATA(surf_model_t) surf_workstation_model;
600 /** \ingroup SURF_models
601 * \brief Initializes the platform with a compound workstation model
603 * This function should be called after a cpu_model and a
604 * network_model have been set up.
607 XBT_PUBLIC(void) surf_workstation_model_init_compound(void);
609 /** \ingroup SURF_models
610 * \brief Initializes the platform with the current best network and cpu models at hand
612 * This platform model seperates the workstation model and the network model.
613 * The workstation model will be initialized with the model compound, the network
614 * model with the model LV08 (with cross traffic support) and the CPU model with
616 * Such model is subject to modification with warning in the ChangeLog so monitor it!
619 XBT_PUBLIC(void) surf_workstation_model_init_current_default(void);
621 /** \ingroup SURF_models
622 * \brief Initializes the platform with the workstation model CLM03
624 * This platform model seperates the workstation model and the network model.
625 * The workstation model will be initialized with the model CLM03, the network
626 * model with the model CM02 and the CPU model with the model Cas01.
627 * In future releases, some other network models will be implemented and will be
628 * combined with the workstation model CLM03.
631 XBT_PUBLIC(void) surf_workstation_model_init_CLM03(void);
633 /** \ingroup SURF_models
634 * \brief Initializes the platform with the model KCCFLN05
636 * With this model, only parallel tasks can be used. Resource sharing
637 * is done by identifying bottlenecks and giving an equal share of
638 * the model to each action.
641 XBT_PUBLIC(void) surf_workstation_model_init_ptask_L07(void);
643 /** \ingroup SURF_models
644 * \brief The list of all available workstation model models
646 XBT_PUBLIC_DATA(s_surf_model_description_t)
647 surf_workstation_model_description[];
649 /** \ingroup SURF_models
650 * \brief List of initialized models
652 XBT_PUBLIC_DATA(xbt_dynar_t) model_list;
654 /*******************************************/
655 /*** SURF Globals **************************/
656 /*******************************************/
657 XBT_PUBLIC_DATA(xbt_cfg_t) _surf_cfg_set;
659 /** \ingroup SURF_simulation
660 * \brief Initialize SURF
661 * \param argc argument number
662 * \param argv arguments
664 * This function has to be called to initialize the common
665 * structures. Then you will have to create the environment by
667 * e.g. surf_workstation_model_init_CLM03()
669 * \see surf_workstation_model_init_CLM03(), surf_workstation_model_init_compound(), surf_exit()
671 XBT_PUBLIC(void) surf_init(int *argc, char **argv); /* initialize common structures */
673 /** \ingroup SURF_simulation
674 * \brief Finish simulation initialization
676 * This function must be called before the first call to surf_solve()
678 XBT_PUBLIC(void) surf_presolve(void);
680 /** \ingroup SURF_simulation
681 * \brief Performs a part of the simulation
682 * \param max_date Maximum date to update the simulation to, or -1
683 * \return the elapsed time, or -1.0 if no event could be executed
685 * This function execute all possible events, update the action states
686 * and returns the time elapsed.
687 * When you call execute or communicate on a model, the corresponding actions
688 * are not executed immediately but only when you call surf_solve.
689 * Note that the returned elapsed time can be zero.
691 XBT_PUBLIC(double) surf_solve(double max_date);
693 /** \ingroup SURF_simulation
694 * \brief Return the current time
696 * Return the current time in millisecond.
698 XBT_PUBLIC(double) surf_get_clock(void);
700 /** \ingroup SURF_simulation
707 XBT_PUBLIC(void) surf_exit(void);
709 /* Prototypes of the functions that handle the properties */
710 XBT_PUBLIC_DATA(xbt_dict_t) current_property_set; /* the prop set for the currently parsed element (also used in SIMIX) */
711 XBT_PUBLIC(void) parse_properties(void);
713 /* surf parse file related (public because called from a test suite) */
714 XBT_PUBLIC(void) parse_platform_file(const char *file);
716 /* Stores the sets */
717 XBT_PUBLIC_DATA(xbt_dict_t) set_list;
719 /* For the trace and trace:connect tag (store their content till the end of the parsing) */
720 XBT_PUBLIC_DATA(xbt_dict_t) traces_set_list;
721 XBT_PUBLIC_DATA(xbt_dict_t) trace_connect_list_host_avail;
722 XBT_PUBLIC_DATA(xbt_dict_t) trace_connect_list_power;
723 XBT_PUBLIC_DATA(xbt_dict_t) trace_connect_list_link_avail;
724 XBT_PUBLIC_DATA(xbt_dict_t) trace_connect_list_bandwidth;
725 XBT_PUBLIC_DATA(xbt_dict_t) trace_connect_list_latency;
728 XBT_PUBLIC(double) get_cpu_power(const char *power);
730 int surf_get_nthreads(void);
731 void surf_set_nthreads(int nthreads);
734 #endif /* _SURF_SURF_H */