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_
77 * @file frsh_configuration_parameters.h
79 * This file contains parameters that govern the capabilities of the
80 * FRescor ScHeduler. They must be in concordance with the respective
86 * @defgroup config Configuration Parameters
88 * Here we define global parameters that will have an important
89 * influence on FRSH behaviour. They must also be coherent with the
90 * respective values in the underlaying OS.
97 * This symbol specifies whether the scheduler will make a
98 * schedulability test of the requested contract or not
100 #define FRSH_ADMISSION_TEST_IS_ENABLED true
103 * This symbol specifies whether the service thread will try to
104 * assign automatically the priorities of each vres
106 #define FRSH_AUTOMATIC_PRIO_ASSIGN_ENABLE true
108 #define FRSH_DISTRIBUTED_MODULE_SUPPORTED false
111 * @defgroup internal Array size for memory optimization
114 * Tune these values for optimizing the amount of memory used by the
120 /** Maximum number of accepted contracts (vres) **/
121 #define FRSH_MAX_N_VRES 125
124 /** Maximum number of threads that may be scheduled by the framework **/
125 #define FRSH_MAX_N_THREADS 25
129 * Maximum number of critical sections that can be stored in a
130 * contract parameters object
132 #define FRSH_MAX_N_CRITICAL_SECTIONS 25
135 * Maximum number of memory areas that can be specified for a
136 * wite operation in a critical section
138 #define FRSH_MAX_N_MEMORY_AREAS 4
141 * Maximum number of utilization values (pairs of budget and period)
142 * that can be stored in a contract parameters object
144 #define FRSH_MAX_N_UTILIZATION_VALUES 5
148 * Maximum number of synchronization objects
150 #define FRSH_MAX_N_SYNCH_OBJECTS 5
153 /** Maximum number of shared objects **/
154 #define FRSH_MAX_N_SHARED_OBJECTS 100
156 /** Maximum number of send and receive endpoints in a single node **/
157 #define FRSH_MAX_N_ENDPOINTS 10
162 * @defgroup schedandservice Scheduler and Service thread parameters
165 * The current implementation in MaRTE OS uses the Application-Defined
166 * Scheduling Interface (proposed to the POSIX standardization
167 * committee), to create a fixed-priority-based scheduler that
168 * operates under the rules of the FIRST scheduling framework.
170 * In this implementation there are two special threads:
171 * - The application scheduler thread, that
172 * implements the scheduler
174 * - The service thread, that is in charge of
175 * negotiating and renegotiating contracts
176 * concurrently with the application
178 * The following symbols are necessary to adapt the application to the
179 * underlying fixed priority scheduler
185 * Priority assigned to the application scheduler; it should be above
186 * the priorities of the application threads and of the service
187 * thread, and it should be at least 1 level below the maximum of the
190 #define FRSH_SCHEDULER_PRIORITY 29 //104
193 * Real-time signal number reserved for the application scheduler to
196 #define FRSH_SCHEDULER_SIGNAL FRSH_SIGNAL_MIN
200 * The highest priority that can be assigned to an application thread,
201 * it should be defined as one level less than the
202 * FRSH_SCHEDULER_PRIORITY
204 #define FRSH_HIGHEST_THREAD_PRIORITY (FRSH_SCHEDULER_PRIORITY-1)
208 * The lowest priority that can be assigned to an application thread,
209 * it should be at least 1 level above the minimum of the system
211 #define FRSH_LOWEST_THREAD_PRIORITY 5
214 * Each call to the functions that negotiate or renegotiate a contract
215 * or that change the quality and importance generates a request for
216 * the service thread that we call a service job. This job will be
217 * pending in a queue until executed by the service thread. The
218 * following symbol represents the maximum number of requests that can
219 * be simultaneously queued.
221 #define FRSH_MAX_N_SERVICE_JOBS FRSH_MAX_N_VRES * 2
225 * In order to bound the background activity of the scheduler (i.e.,
226 * the admission tests necessary for the negotiation and
227 * re-negotiation of contracts), a service thread has been defined. It
228 * runs at a given priority level and has a budget and period
233 /** Initial period of the service thread (timespec) **/
234 #define FRSH_SERVICE_THREAD_PERIOD {5,0}
236 /** Initial budget of the service thread (timespec) **/
237 #define FRSH_SERVICE_THREAD_BUDGET {0,1000000}
240 * Initial priority of the service thread, it has to be lower than the
241 * FRSH_SCHEDULER_PRIORITY, and is set according to its period and the
242 * expected response times for reconfiguration or tunning of the
245 #define FRSH_SERVICE_THREAD_PRIORITY (FRSH_LOWEST_THREAD_PRIORITY+1) //3 3 //3 1
252 * @defgroup miscconfig Miscellaneous Config parameters
259 * Maximum number of vres that can be simultaneusly waiting for
260 * being signaled in a synchronization object
262 #define FRSH_MAX_N_VRES_IN_SYNCH_OBJECT 4
266 * Maximum number of events that can be pending to be signaled in a
267 * synchronization object
269 #define FRSH_MAX_N_EVENTS_IN_SYNCH_OBJECT 100
272 * Maximum number of pending replenishments in each sporadic server
274 #define FRSH_MAX_N_PENDING_REPLENISHMENTS 25 //250
278 * Maximum number of target windows in a table driven schedule
280 #define FRSH_MAX_N_TARGET_WINDOWS 100
283 * The cpu time given by the round robin scheduler
284 * to the threads in the background (timespec)
286 #define FRSH_RR_SLICE_CPU_TIME {0,100000000} //3 0.1 sec
289 * This function must be supplied by the user to map the preemption
290 * level values given in the contracts for the vres, to priority
291 * values in the range that is allowed by the present implementation
292 * for application threads. The value returned by the function must
293 * fit in the interval defined by the constants:
294 * [FRSH_LOWEST_THREAD_PRIORITY, FRSH_HIGHEST_THREAD_PRIORITY]
296 int frsh_priority_map (unsigned long plevel);
299 * This symbol specifies the maximum number of chars that are stored
300 * of a given shared_object_id, so this is the maximum length used
303 #define FRSH_MAX_SIZE_SHARED_OBJ_LABEL 15
306 /** Maximum number of networks accesible from a node **/
307 #define FRSH_MAX_N_NETWORK_IDS 1
310 * Maximum number of vres that can be given in a vres list
311 * to the group negotiation/cancellation primitive
313 #define FRSH_MAX_N_VRES_VALUES 10
316 * Maximum number of contracts that can be given in a contracts list
317 * to the group negotiation/cancellation primitive
319 #define FRSH_MAX_N_CONTRACT_VALUES 10
322 * Default overheads of shared object protection mechanisms
323 * These values should be calibrated on each specific execution platform
326 // fixed overhead for saving the environment and subsequently
327 // aborting a critical section; units in nanoseconds
329 #define FRSH_SO_FIXED_ABORT_OVHD 0
332 // fixed overhead for copying a memory area, in nanoseconds
334 #define FRSH_SO_FIXED_AREA_OVHD 0
337 // variable overhead for copying a memory area; units in nanoseconds per kbyte
339 #define FRSH_SO_NANOS_PER_KB 0
346 #endif /* _FRSH_CONFIGURATION_PARAMETERS_H_ */