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);
37 /** @brief Creates a new action.
39 * @param size The size is the one of the subtype you want to create
40 * @param cost initial value
41 * @param model to which model we should attach this action
42 * @param failed whether we should start this action in failed mode
44 XBT_PUBLIC(void *) surf_action_new(size_t size, double cost,
45 surf_model_t model, int failed);
47 /** \brief Resource model description
49 typedef struct surf_model_description {
51 const char *description;
52 void_f_void_t model_init_preparse;
53 } s_surf_model_description_t, *surf_model_description_t;
55 XBT_PUBLIC(int) find_model_description(s_surf_model_description_t * table,
57 XBT_PUBLIC(void) model_help(const char *category,
58 s_surf_model_description_t * table);
60 enum heap_action_type{
67 /** \ingroup SURF_actions
68 * \brief Action structure
70 * Never create s_surf_action_t by yourself ! The actions are created
71 * on the fly when you call execute or communicate on a model.
73 * \see e_surf_action_state_t
75 typedef struct surf_action {
76 s_xbt_swag_hookup_t state_hookup;
78 double cost; /**< cost */
79 double priority; /**< priority (1.0 by default) */
80 double max_duration; /**< max_duration (may fluctuate until
81 the task is completed) */
82 double remains; /**< How much of that cost remains to
83 * be done in the currently running task */
84 #ifdef HAVE_LATENCY_BOUND_TRACKING
85 int latency_limited; /**< Set to 1 if is limited by latency, 0 otherwise */
88 double start; /**< start time */
89 double finish; /**< finish time : this is modified during the run
90 * and fluctuates until the task is completed */
91 void *data; /**< for your convenience */
93 surf_model_t model_type;
95 char *category; /**< tracing category for categorized resource utilization monitoring */
97 surf_file_t file; /**< surf_file_t for storage model */
98 s_file_stat_t stat; /**< surf_file_t for storage model */
101 typedef struct surf_action_lmm {
102 s_surf_action_t generic_action;
103 lmm_variable_t variable;
105 s_xbt_swag_hookup_t action_list_hookup;
109 enum heap_action_type hat;
110 } s_surf_action_lmm_t, *surf_action_lmm_t;
112 /** \ingroup SURF_actions
113 * \brief Action states
117 * \see surf_action_t, surf_action_state_t
120 SURF_ACTION_READY = 0, /**< Ready */
121 SURF_ACTION_RUNNING, /**< Running */
122 SURF_ACTION_FAILED, /**< Task Failure */
123 SURF_ACTION_DONE, /**< Completed */
124 SURF_ACTION_TO_FREE, /**< Action to free in next cleanup */
125 SURF_ACTION_NOT_IN_THE_SYSTEM
126 /**< Not in the system anymore. Why did you ask ? */
127 } e_surf_action_state_t;
129 /** \ingroup SURF_actions
130 * \brief Action state sets
132 * This structure contains some sets of actions.
133 * It provides a fast access to the actions in each state.
135 * \see surf_action_t, e_surf_action_state_t
137 typedef struct surf_action_state {
138 xbt_swag_t ready_action_set;
139 /**< Actions in state SURF_ACTION_READY */
140 xbt_swag_t running_action_set;
141 /**< Actions in state SURF_ACTION_RUNNING */
142 xbt_swag_t failed_action_set;
143 /**< Actions in state SURF_ACTION_FAILED */
144 xbt_swag_t done_action_set;
145 /**< Actions in state SURF_ACTION_DONE */
146 } s_surf_action_state_t, *surf_action_state_t;
148 /***************************/
149 /* Generic model object */
150 /***************************/
151 typedef struct s_routing_platf s_routing_platf_t, *routing_platf_t;
152 XBT_PUBLIC_DATA(routing_platf_t) routing_platf;
155 /** \ingroup SURF_models
156 * \brief Private data available on all models
158 typedef struct surf_model_private *surf_model_private_t;
162 /** \ingroup SURF_models
163 * \brief CPU model extension public
165 * Public functions specific to the CPU model.
167 typedef struct surf_cpu_model_extension_public {
168 surf_action_t(*execute) (void *cpu, double size);
169 surf_action_t(*sleep) (void *cpu, double duration);
170 e_surf_resource_state_t(*get_state) (void *cpu);
171 double (*get_speed) (void *cpu, double load);
172 double (*get_available_speed) (void *cpu);
173 void* (*create_resource) (const char *name, double power_peak,
175 tmgr_trace_t power_trace,
177 e_surf_resource_state_t state_initial,
178 tmgr_trace_t state_trace,
179 xbt_dict_t cpu_properties);
180 void (*add_traces) (void);
181 } s_surf_model_extension_cpu_t;
185 /** \ingroup SURF_models
186 * \brief Network model extension public
188 * Public functions specific to the network model
190 typedef struct surf_network_model_extension_public {
191 surf_action_t (*communicate) (sg_routing_edge_t src,
192 sg_routing_edge_t dst,
193 double size, double rate);
194 xbt_dynar_t(*get_route) (void *src, void *dst); //FIXME: kill field? That is done by the routing nowadays
195 double (*get_link_bandwidth) (const void *link);
196 double (*get_link_latency) (const void *link);
197 int (*link_shared) (const void *link);
198 void (*add_traces) (void);
199 void* (*create_resource) (const char *name,
201 tmgr_trace_t bw_trace,
203 tmgr_trace_t lat_trace,
204 e_surf_resource_state_t
206 tmgr_trace_t state_trace,
207 e_surf_link_sharing_policy_t policy,
208 xbt_dict_t properties);
209 } s_surf_model_extension_network_t;
213 /** \ingroup SURF_models
214 * \brief Storage model extension public
216 * Public functions specific to the Storage model.
219 typedef struct surf_storage_model_extension_public {
220 surf_action_t(*open) (void *storage, const char* path, const char* mode);
221 surf_action_t(*close) (void *storage, surf_file_t fp);
222 surf_action_t(*read) (void *storage, void* ptr, size_t size, size_t nmemb, surf_file_t stream);
223 surf_action_t(*write) (void *storage, const void* ptr, size_t size, size_t nmemb, surf_file_t stream);
224 surf_action_t(*stat) (void *storage, surf_file_t stream);
225 void* (*create_resource) (const char* id, const char* model,const char* type_id);
226 } s_surf_model_extension_storage_t;
228 /** \ingroup SURF_models
229 * \brief Workstation model extension public
231 * Public functions specific to the workstation model.
233 typedef struct surf_workstation_model_extension_public {
234 surf_action_t(*execute) (void *workstation, double size); /**< Execute a computation amount on a workstation
235 and create the corresponding action */
236 surf_action_t(*sleep) (void *workstation, double duration); /**< Make a workstation sleep during a given duration */
237 e_surf_resource_state_t(*get_state) (void *workstation); /**< Return the CPU state of a workstation */
238 double (*get_speed) (void *workstation, double load); /**< Return the speed of a workstation */
239 double (*get_available_speed) (void *workstation); /**< Return tha available speed of a workstation */
240 surf_action_t(*communicate) (void *workstation_src, /**< Execute a communication amount between two workstations */
241 void *workstation_dst, double size,
243 // FIXME: kill next field, which duplicates the routing
244 xbt_dynar_t(*get_route) (void *workstation_src, void *workstation_dst); /**< Get the list of links between two ws */
246 surf_action_t(*execute_parallel_task) (int workstation_nb, /**< Execute a parallel task on several workstations */
247 void **workstation_list,
248 double *computation_amount,
249 double *communication_amount,
250 double amount, double rate);
251 double (*get_link_bandwidth) (const void *link); /**< Return the current bandwidth of a network link */
252 double (*get_link_latency) (const void *link); /**< Return the current latency of a network link */
253 surf_action_t(*open) (void *workstation, const char* storage, const char* path, const char* mode);
254 surf_action_t(*close) (void *workstation, const char* storage, surf_file_t fp);
255 surf_action_t(*read) (void *workstation, const char* storage, void* ptr, size_t size, size_t nmemb, surf_file_t stream);
256 surf_action_t(*write) (void *workstation, const char* storage, const void* ptr, size_t size, size_t nmemb, surf_file_t stream);
257 surf_action_t(*stat) (void *workstation, const char* storage, surf_file_t stream);
258 int (*link_shared) (const void *link);
259 xbt_dict_t(*get_properties) (const void *resource);
260 void* (*link_create_resource) (const char *name,
262 tmgr_trace_t bw_trace,
264 tmgr_trace_t lat_trace,
265 e_surf_resource_state_t
267 tmgr_trace_t state_trace,
268 e_surf_link_sharing_policy_t
269 policy, xbt_dict_t properties);
270 void* (*cpu_create_resource) (const char *name, double power_peak,
272 tmgr_trace_t power_trace,
273 e_surf_resource_state_t state_initial,
274 tmgr_trace_t state_trace,
275 xbt_dict_t cpu_properties);
276 void (*add_traces) (void);
278 } s_surf_model_extension_workstation_t;
283 /** \ingroup SURF_models
284 * \brief Model datatype
286 * Generic data structure for a model. The workstations,
287 * the CPUs and the network links are examples of models.
289 typedef struct surf_model {
290 const char *name; /**< Name of this model */
291 s_surf_action_state_t states; /**< Any living action on this model */
293 e_surf_action_state_t(*action_state_get) (surf_action_t action);
294 /**< Return the state of an action */
295 void (*action_state_set) (surf_action_t action,
296 e_surf_action_state_t state);
297 /**< Change an action state*/
299 double (*action_get_start_time) (surf_action_t action); /**< Return the start time of an action */
300 double (*action_get_finish_time) (surf_action_t action); /**< Return the finish time of an action */
301 int (*action_unref) (surf_action_t action); /**< Specify that we don't use that action anymore */
302 void (*action_cancel) (surf_action_t action); /**< Cancel a running action */
303 void (*action_recycle) (surf_action_t action); /**< Recycle an action */
304 void (*action_data_set) (surf_action_t action, void *data); /**< Set the user data of an action */
305 void (*suspend) (surf_action_t action); /**< Suspend an action */
306 void (*resume) (surf_action_t action); /**< Resume a suspended action */
307 int (*is_suspended) (surf_action_t action); /**< Return whether an action is suspended */
308 void (*set_max_duration) (surf_action_t action, double duration); /**< Set the max duration of an action*/
309 void (*set_priority) (surf_action_t action, double priority); /**< Set the priority of an action */
311 void (*set_category) (surf_action_t action, const char *category); /**< Set the category of an action */
313 double (*get_remains) (surf_action_t action); /**< Get the remains of an action */
314 #ifdef HAVE_LATENCY_BOUND_TRACKING
315 int (*get_latency_limited) (surf_action_t action); /**< Return 1 if action is limited by latency, 0 otherwise */
318 surf_model_private_t model_private;
321 s_surf_model_extension_cpu_t cpu;
322 s_surf_model_extension_network_t network;
323 s_surf_model_extension_storage_t storage;
324 s_surf_model_extension_workstation_t workstation;
328 surf_model_t surf_model_init(void);
329 void surf_model_exit(surf_model_t model);
331 static inline void *surf_cpu_resource_by_name(const char *name) {
332 return xbt_lib_get_or_null(host_lib, name, SURF_CPU_LEVEL);
334 static inline void *surf_workstation_resource_by_name(const char *name){
335 return xbt_lib_get_or_null(host_lib, name, SURF_WKS_LEVEL);
337 static inline void *surf_storage_resource_by_name(const char *name){
338 return xbt_lib_get_or_null(storage_lib, name, SURF_STORAGE_LEVEL);
341 typedef struct surf_resource {
344 xbt_dict_t properties;
345 } s_surf_resource_t, *surf_resource_t;
348 * Resource which have a metric handled by a maxmin system
353 tmgr_trace_event_t event;
356 typedef struct surf_resource_lmm {
357 s_surf_resource_t generic_resource;
358 lmm_constraint_t constraint;
359 e_surf_resource_state_t state_current;
360 tmgr_trace_event_t state_event;
361 s_surf_metric_t power;
362 } s_surf_resource_lmm_t, *surf_resource_lmm_t;
364 /**************************************/
365 /* Implementations of model object */
366 /**************************************/
369 /** \ingroup SURF_models
370 * \brief The CPU model
372 XBT_PUBLIC_DATA(surf_model_t) surf_cpu_model;
374 /** \ingroup SURF_models
375 * \brief Initializes the CPU model with the model Cas01
377 * By default, this model uses the lazy optimization mechanism that
378 * relies on partial invalidation in LMM and a heap for lazy action update.
379 * You can change this behavior by setting the cpu/optim configuration
380 * variable to a different value.
382 * This function is called by surf_workstation_model_init_CLM03
383 * so you shouldn't have to call it by yourself.
385 * \see surf_workstation_model_init_CLM03()
387 XBT_PUBLIC(void) surf_cpu_model_init_Cas01(void);
389 /** \ingroup SURF_models
390 * \brief Initializes the CPU model with trace integration [Deprecated]
392 * You shouldn't have to call it by yourself.
393 * \see surf_workstation_model_init_CLM03()
395 XBT_PUBLIC(void) surf_cpu_model_init_ti(void);
397 /** \brief This function call the share resources function needed
400 XBT_PUBLIC(double) generic_share_resources(double now);
402 /** \brief This function call the update action state function needed
405 XBT_PUBLIC(void) generic_update_actions_state(double now, double delta);
407 /** \ingroup SURF_models
408 * \brief The list of all available optimization modes (both for cpu and networks).
409 * These optimization modes can be set using --cfg=cpu/optim:... and --cfg=network/optim:...
411 XBT_PUBLIC_DATA(s_surf_model_description_t) surf_optimization_mode_description[];
413 /** \ingroup SURF_models
414 * \brief The list of all available cpu model models
416 XBT_PUBLIC_DATA(s_surf_model_description_t) surf_cpu_model_description[];
418 XBT_PUBLIC(void) create_workstations(void);
420 /**\brief create new host bypass the parser
425 /** \ingroup SURF_models
426 * \brief The network model
428 * When creating a new API on top on SURF, you shouldn't use the
429 * network model unless you know what you are doing. Only the workstation
430 * model should be accessed because depending on the platform model,
431 * the network model can be NULL.
433 XBT_PUBLIC_DATA(surf_model_t) surf_network_model;
435 /** \ingroup SURF_models
436 * \brief Same as network model 'LagrangeVelho', only with different correction factors.
438 * This model is proposed by Pierre-Nicolas Clauss and Martin Quinson and Stéphane Génaud
439 * based on the model 'LV08' and different correction factors depending on the communication
440 * size (< 1KiB, < 64KiB, >= 64KiB).
441 * See comments in the code for more information.
443 * \see surf_workstation_model_init_SMPI()
445 XBT_PUBLIC(void) surf_network_model_init_SMPI(void);
447 /** \ingroup SURF_models
448 * \brief Initializes the platform with the network model 'LegrandVelho'
450 * This model is proposed by Arnaud Legrand and Pedro Velho based on
451 * the results obtained with the GTNets simulator for onelink and
452 * dogbone sharing scenarios. See comments in the code for more information.
454 * \see surf_workstation_model_init_LegrandVelho()
456 XBT_PUBLIC(void) surf_network_model_init_LegrandVelho(void);
458 /** \ingroup SURF_models
459 * \brief Initializes the platform with the network model 'Constant'
461 * In this model, the communication time between two network cards is
462 * constant, hence no need for a routing table. This is particularly
463 * usefull when simulating huge distributed algorithms where
464 * scalability is really an issue. This function is called in
465 * conjunction with surf_workstation_model_init_compound.
467 * \see surf_workstation_model_init_compound()
469 XBT_PUBLIC(void) surf_network_model_init_Constant(void);
471 /** \ingroup SURF_models
472 * \brief Initializes the platform with the network model CM02
474 * This function is called by surf_workstation_model_init_CLM03
475 * or by yourself only if you plan using surf_workstation_model_init_compound
476 * See comments in the code for more information.
478 * \see surf_workstation_model_init_CLM03()
480 XBT_PUBLIC(void) surf_network_model_init_CM02(void);
483 * brief initialize the the network model bypassing the XML parser
485 XBT_PUBLIC(void) surf_network_model_init_bypass(const char *id,
490 /** \ingroup SURF_models
491 * \brief Initializes the platform with the network model GTNETS
492 * \param filename XML platform file name
494 * This function is called by surf_workstation_model_init_GTNETS
495 * or by yourself only if you plan using surf_workstation_model_init_compound
497 * \see surf_workstation_model_init_GTNETS()
499 XBT_PUBLIC(void) surf_network_model_init_GTNETS(void);
503 /** \ingroup SURF_models
504 * \brief Initializes the platform with the network model NS3
505 * \param filename XML platform file name
507 * This function is called by surf_workstation_model_init_NS3
508 * or by yourself only if you plan using surf_workstation_model_init_compound
510 * \see surf_workstation_model_init_NS3()
512 XBT_PUBLIC(void) surf_network_model_init_NS3(void);
515 /** \ingroup SURF_models
516 * \brief Initializes the platform with the network model Reno
517 * \param filename XML platform file name
519 * The problem is related to max( sum( arctan(C * Df * xi) ) ).
522 * [LOW03] S. H. Low. A duality model of TCP and queue management algorithms.
523 * IEEE/ACM Transaction on Networking, 11(4):525-536, 2003.
525 * Call this function only if you plan using surf_workstation_model_init_compound.
528 XBT_PUBLIC(void) surf_network_model_init_Reno(void);
530 /** \ingroup SURF_models
531 * \brief Initializes the platform with the network model Reno2
532 * \param filename XML platform file name
534 * The problem is related to max( sum( arctan(C * Df * xi) ) ).
537 * [LOW01] S. H. Low. A duality model of TCP and queue management algorithms.
538 * IEEE/ACM Transaction on Networking, 11(4):525-536, 2003.
540 * Call this function only if you plan using surf_workstation_model_init_compound.
543 XBT_PUBLIC(void) surf_network_model_init_Reno2(void);
545 /** \ingroup SURF_models
546 * \brief Initializes the platform with the network model Vegas
547 * \param filename XML platform file name
549 * This problem is related to max( sum( a * Df * ln(xi) ) ) which is equivalent
550 * to the proportional fairness.
553 * [LOW03] S. H. Low. A duality model of TCP and queue management algorithms.
554 * IEEE/ACM Transaction on Networking, 11(4):525-536, 2003.
556 * Call this function only if you plan using surf_workstation_model_init_compound.
559 XBT_PUBLIC(void) surf_network_model_init_Vegas(void);
561 /** \ingroup SURF_models
562 * \brief The list of all available network model models
564 XBT_PUBLIC_DATA(s_surf_model_description_t)
565 surf_network_model_description[];
572 /** \ingroup SURF_models
573 * \brief The storage model
575 XBT_PUBLIC(void) surf_storage_model_init_default(void);
577 /** \ingroup SURF_models
578 * \brief The list of all available storage modes.
579 * This storage mode can be set using --cfg=storage/model:...
581 XBT_PUBLIC_DATA(s_surf_model_description_t) surf_storage_model_description[];
589 /** \ingroup SURF_models
590 * \brief The workstation model
592 * Note that when you create an API on top of SURF,
593 * the workstation model should be the only one you use
594 * because depending on the platform model, the network model and the CPU model
597 XBT_PUBLIC_DATA(surf_model_t) surf_workstation_model;
599 /** \ingroup SURF_models
600 * \brief Initializes the platform with a compound workstation model
602 * This function should be called after a cpu_model and a
603 * network_model have been set up.
606 XBT_PUBLIC(void) surf_workstation_model_init_compound(void);
608 /** \ingroup SURF_models
609 * \brief Initializes the platform with the current best network and cpu models at hand
611 * This platform model seperates the workstation model and the network model.
612 * The workstation model will be initialized with the model compound, the network
613 * model with the model LV08 (with cross traffic support) and the CPU model with
615 * Such model is subject to modification with warning in the ChangeLog so monitor it!
618 XBT_PUBLIC(void) surf_workstation_model_init_current_default(void);
620 /** \ingroup SURF_models
621 * \brief Initializes the platform with the workstation model CLM03
623 * This platform model seperates the workstation model and the network model.
624 * The workstation model will be initialized with the model CLM03, the network
625 * model with the model CM02 and the CPU model with the model Cas01.
626 * In future releases, some other network models will be implemented and will be
627 * combined with the workstation model CLM03.
630 XBT_PUBLIC(void) surf_workstation_model_init_CLM03(void);
632 /** \ingroup SURF_models
633 * \brief Initializes the platform with the model KCCFLN05
635 * With this model, only parallel tasks can be used. Resource sharing
636 * is done by identifying bottlenecks and giving an equal share of
637 * the model to each action.
640 XBT_PUBLIC(void) surf_workstation_model_init_ptask_L07(void);
642 /** \ingroup SURF_models
643 * \brief The list of all available workstation model models
645 XBT_PUBLIC_DATA(s_surf_model_description_t)
646 surf_workstation_model_description[];
648 /** \ingroup SURF_models
649 * \brief List of initialized models
651 XBT_PUBLIC_DATA(xbt_dynar_t) model_list;
653 /*******************************************/
654 /*** SURF Globals **************************/
655 /*******************************************/
656 XBT_PUBLIC_DATA(xbt_cfg_t) _surf_cfg_set;
658 /** \ingroup SURF_simulation
659 * \brief Initialize SURF
660 * \param argc argument number
661 * \param argv arguments
663 * This function has to be called to initialize the common
664 * structures. Then you will have to create the environment by
666 * e.g. surf_workstation_model_init_CLM03()
668 * \see surf_workstation_model_init_CLM03(), surf_workstation_model_init_compound(), surf_exit()
670 XBT_PUBLIC(void) surf_init(int *argc, char **argv); /* initialize common structures */
672 /** \ingroup SURF_simulation
673 * \brief Finish simulation initialization
675 * This function must be called before the first call to surf_solve()
677 XBT_PUBLIC(void) surf_presolve(void);
679 /** \ingroup SURF_simulation
680 * \brief Performs a part of the simulation
681 * \param max_date Maximum date to update the simulation to, or -1
682 * \return the elapsed time, or -1.0 if no event could be executed
684 * This function execute all possible events, update the action states
685 * and returns the time elapsed.
686 * When you call execute or communicate on a model, the corresponding actions
687 * are not executed immediately but only when you call surf_solve.
688 * Note that the returned elapsed time can be zero.
690 XBT_PUBLIC(double) surf_solve(double max_date);
692 /** \ingroup SURF_simulation
693 * \brief Return the current time
695 * Return the current time in millisecond.
697 XBT_PUBLIC(double) surf_get_clock(void);
699 /** \ingroup SURF_simulation
706 XBT_PUBLIC(void) surf_exit(void);
708 /* Prototypes of the functions that handle the properties */
709 XBT_PUBLIC_DATA(xbt_dict_t) current_property_set; /* the prop set for the currently parsed element (also used in SIMIX) */
710 XBT_PUBLIC(void) parse_properties(void);
712 /* surf parse file related (public because called from a test suite) */
713 XBT_PUBLIC(void) parse_platform_file(const char *file);
715 /* Stores the sets */
716 XBT_PUBLIC_DATA(xbt_dict_t) set_list;
718 /* For the trace and trace:connect tag (store their content till the end of the parsing) */
719 XBT_PUBLIC_DATA(xbt_dict_t) traces_set_list;
720 XBT_PUBLIC_DATA(xbt_dict_t) trace_connect_list_host_avail;
721 XBT_PUBLIC_DATA(xbt_dict_t) trace_connect_list_power;
722 XBT_PUBLIC_DATA(xbt_dict_t) trace_connect_list_link_avail;
723 XBT_PUBLIC_DATA(xbt_dict_t) trace_connect_list_bandwidth;
724 XBT_PUBLIC_DATA(xbt_dict_t) trace_connect_list_latency;
727 XBT_PUBLIC(double) get_cpu_power(const char *power);
729 int surf_get_nthreads(void);
730 void surf_set_nthreads(int nthreads);
733 #endif /* _SURF_SURF_H */