1 // -----------------------------------------------------------------------
2 // Copyright (C) 2006 - 2007 FRESCOR consortium partners:
4 // Universidad de Cantabria, SPAIN
5 // University of York, UK
6 // Scuola Superiore Sant'Anna, ITALY
7 // Kaiserslautern University, GERMANY
8 // Univ. Politécnica Valencia, SPAIN
9 // Czech Technical University in Prague, CZECH REPUBLIC
11 // Thales Communication S.A. FRANCE
12 // Visual Tools S.A. SPAIN
13 // Rapita Systems Ltd UK
16 // See http://www.frescor.org for a link to partners' websites
18 // FRESCOR project (FP6/2005/IST/5-034026) is funded
19 // in part by the European Union Sixth Framework Programme
20 // The European Union is not liable of any use that may be
24 // based on previous work (FSF) done in the FIRST project
26 // Copyright (C) 2005 Mälardalen University, SWEDEN
27 // Scuola Superiore S.Anna, ITALY
28 // Universidad de Cantabria, SPAIN
29 // University of York, UK
31 // FSF API web pages: http://marte.unican.es/fsf/docs
32 // http://shark.sssup.it/contrib/first/docs/
34 // This file is part of FRSH API
36 // FRSH API is free software; you can redistribute it and/or modify
37 // it under the terms of the GNU General Public License as published by
38 // the Free Software Foundation; either version 2, or (at your option)
41 // FRSH API is distributed in the hope that it will be useful, but
42 // WITHOUT ANY WARRANTY; without even the implied warranty of
43 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
44 // General Public License for more details.
46 // You should have received a copy of the GNU General Public License
47 // distributed with FRSH API; see file COPYING. If not, write to the
48 // Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
51 // As a special exception, if you include this header file into source
52 // files to be compiled, this header file does not by itself cause
53 // the resulting executable to be covered by the GNU General Public
54 // License. This exception does not however invalidate any other
55 // reasons why the executable file might be covered by the GNU General
57 // -----------------------------------------------------------------------
58 //frsh_configuration_parameters.h
59 //==============================================
60 // ******** ******* ******** ** **
61 // **///// /**////** **////// /** /**
62 // ** /** /** /** /** /**
63 // ******* /******* /********* /**********
64 // **//// /**///** ////////** /**//////**
65 // ** /** //** /** /** /**
66 // ** /** //** ******** /** /**
67 // // // // //////// // //
69 // FRSH(FRescor ScHeduler), pronounced "fresh"
70 //==============================================
71 #ifndef _FRSH_CONFIGURATION_PARAMETERS_H_
72 #define _FRSH_CONFIGURATION_PARAMETERS_H_
79 * @file frsh_configuration_parameters.h
81 * This file contains parameters that govern the capabilities of the
82 * FRescor ScHeduler. They must be in concordance with the respective
88 * @defgroup config Configuration Parameters
90 * Here we define global parameters that will have an important
91 * influence on FRSH behaviour. They must also be coherent with the
92 * respective values in the underlaying OS.
99 * This symbol specifies whether the scheduler will make a
100 * schedulability test of the requested contract or not
102 #define FRSH_ADMISSION_TEST_IS_ENABLED true
105 * This symbol specifies whether the service thread will try to
106 * assign automatically the priorities of each vres
108 #define FRSH_AUTOMATIC_PRIO_ASSIGN_ENABLE true
110 #define FRSH_DISTRIBUTED_MODULE_SUPPORTED false
113 /** This defines 1 resource_id value for systems that have only one
114 resource of a kind. **/
115 #define FRSH_RESOURCE_ID_DEFAULT 0
116 #define FRSH_CPU_ID_DEFAULT 0
117 #define FRSH_NETWORK_ID_DEFAULT 0
120 * @defgroup internal Array size for memory optimization
123 * Tune these values for optimizing the amount of memory used by the
129 /** Maximum number of accepted contracts (vres) **/
130 #define FRSH_MAX_N_VRES 125
133 /** Maximum number of threads that may be scheduled by the framework **/
134 #define FRSH_MAX_N_THREADS 25
138 * Maximum number of critical sections that can be stored in a
139 * contract parameters object
141 #define FRSH_MAX_N_CRITICAL_SECTIONS 25
144 * Maximum number of memory areas that can be specified for a
145 * wite operation in a critical section
147 #define FRSH_MAX_N_MEMORY_AREAS 4
150 * Maximum number of utilization values (pairs of budget and period)
151 * that can be stored in a contract parameters object
153 #define FRSH_MAX_N_UTILIZATION_VALUES 5
155 /** Number of importance levels for spare capacity allocation **/
156 #define FRSH_N_IMPORTANCE_LEVELS 5
159 * Maximum number of synchronization objects
161 #define FRSH_MAX_N_SYNCH_OBJECTS 5
164 /** Maximum number of shared objects **/
165 #define FRSH_MAX_N_SHARED_OBJECTS 100
167 /** Maximum number of send and receive endpoints in a single node **/
168 #define FRSH_MAX_N_ENDPOINTS 10
170 /** Maximum number of chars for a contract label **/
171 #define FRSH_CONTRACT_LABEL_MAXLENGTH 15
176 * @defgroup schedandservice Scheduler and Service thread parameters
179 * The current implementation in MaRTE OS uses the Application-Defined
180 * Scheduling Interface (proposed to the POSIX standardization
181 * committee), to create a fixed-priority-based scheduler that
182 * operates under the rules of the FIRST scheduling framework.
184 * In this implementation there are two special threads:
185 * - The application scheduler thread, that
186 * implements the scheduler
188 * - The service thread, that is in charge of
189 * negotiating and renegotiating contracts
190 * concurrently with the application
192 * The following symbols are necessary to adapt the application to the
193 * underlying fixed priority scheduler
199 * Priority assigned to the application scheduler; it should be above
200 * the priorities of the application threads and of the service
201 * thread, and it should be at least 1 level below the maximum of the
204 #define FRSH_SCHEDULER_PRIORITY (fosa_get_priority_max() - FOSA_ADS_SCHEDULER_PRIO_DIFF)
207 * Real-time signal number reserved for the application scheduler to
210 #define FRSH_SCHEDULER_SIGNAL FRSH_SIGNAL_MIN
215 * The highest priority that can be assigned to an application thread,
216 * it should be defined as one level less than the
217 * FRSH_SCHEDULER_PRIORITY
219 #define FRSH_HIGHEST_THREAD_PRIORITY (FRSH_SCHEDULER_PRIORITY-1)
223 * The lowest priority that can be assigned to an application thread,
224 * it should be at least 1 level above the minimum of the system
226 #define FRSH_LOWEST_THREAD_PRIORITY ( fosa_get_priority_min() + 4)
229 * Each call to the functions that negotiate or renegotiate a contract
230 * or that change the quality and importance generates a request for
231 * the service thread that we call a service job. This job will be
232 * pending in a queue until executed by the service thread. The
233 * following symbol represents the maximum number of requests that can
234 * be simultaneously queued.
236 #define FRSH_MAX_N_SERVICE_JOBS (FRSH_MAX_N_VRES * 2)
240 * In order to bound the background activity of the scheduler (i.e.,
241 * the admission tests necessary for the negotiation and
242 * re-negotiation of contracts), a service thread has been defined. It
243 * runs at a given priority level and has a budget and period
248 /** Initial period of the service thread (timespec) **/
249 #define FRSH_SERVICE_THREAD_PERIOD_USECS 5000000 /* 5 secs */
251 /** Initial budget of the service thread (timespec) **/
252 #define FRSH_SERVICE_THREAD_BUDGET_USECS 1000 /* 1 msec */
255 * Initial priority of the service thread, it has to be lower than the
256 * FRSH_SCHEDULER_PRIORITY, and is set according to its period and the
257 * expected response times for reconfiguration or tunning of the
260 #define FRSH_SERVICE_THREAD_PRIORITY (FRSH_LOWEST_THREAD_PRIORITY+1) //3 3 //3 1
267 * @defgroup miscconfig Miscellaneous Config parameters
274 * Maximum number of vres that can be simultaneusly waiting for
275 * being signaled in a synchronization object
277 #define FRSH_MAX_N_VRES_IN_SYNCH_OBJECT 4
281 * Maximum number of events that can be pending to be signaled in a
282 * synchronization object
284 #define FRSH_MAX_N_EVENTS_IN_SYNCH_OBJECT 100
287 * Maximum number of pending replenishments in each sporadic server
289 #define FRSH_MAX_N_PENDING_REPLENISHMENTS 25 //250
293 * Maximum number of target windows in a table driven schedule
295 #define FRSH_MAX_N_TARGET_WINDOWS 100
298 * The cpu time given by the round robin scheduler
299 * to the threads in the background (timespec)
301 #define FRSH_RR_SLICE_CPU_TIME_USECS 100000 // 0.1 sec
304 * This function must be supplied by the user to map the preemption
305 * level values given in the contracts for the vres, to priority
306 * values in the range that is allowed by the present implementation
307 * for application threads. The value returned by the function must
308 * fit in the interval defined by the constants:
309 * [FRSH_LOWEST_THREAD_PRIORITY, FRSH_HIGHEST_THREAD_PRIORITY]
311 int frsh_priority_map (unsigned long plevel);
314 * This symbol specifies the maximum number of chars that are stored
315 * of a given shared_object_id, so this is the maximum length used
318 #define FRSH_MAX_SIZE_SHARED_OBJ_LABEL 15
321 /** Maximum number of networks accesible from a node **/
322 #define FRSH_MAX_N_NETWORK_IDS 1
325 * Maximum number of vres that can be given in a vres list
326 * to the group negotiation/cancellation primitive
328 #define FRSH_MAX_N_VRES_VALUES 10
331 * Maximum number of contracts that can be given in a contracts list
332 * to the group negotiation/cancellation primitive
334 #define FRSH_MAX_N_CONTRACT_VALUES 10
337 * Default overheads of shared object protection mechanisms
338 * These values should be calibrated on each specific execution platform
341 // fixed overhead for saving the environment and subsequently
342 // aborting a critical section; units in nanoseconds
344 #define FRSH_SO_FIXED_ABORT_OVHD 0
347 // fixed overhead for copying a memory area, in nanoseconds
349 #define FRSH_SO_FIXED_AREA_OVHD 0
352 // variable overhead for copying a memory area; units in nanoseconds per kbyte
354 #define FRSH_SO_NANOS_PER_KB 0
363 #endif /* _FRSH_CONFIGURATION_PARAMETERS_H_ */