resources/dummy/frm_dummy.c

   1 /**************************************************************************/
   2 /* ---------------------------------------------------------------------- */
   3 /* Copyright (C) 2006 - 2008 FRESCOR consortium partners:                 */
   4 /*                                                                        */
   5 /*   Universidad de Cantabria,              SPAIN                         */
   6 /*   University of York,                    UK                            */
   7 /*   Scuola Superiore Sant'Anna,            ITALY                         */
   8 /*   Kaiserslautern University,             GERMANY                       */
   9 /*   Univ. Politécnica  Valencia,           SPAIN                        */
  10 /*   Czech Technical University in Prague,  CZECH REPUBLIC                */
  11 /*   ENEA                                   SWEDEN                        */
  12 /*   Thales Communication S.A.              FRANCE                        */
  13 /*   Visual Tools S.A.                      SPAIN                         */
  14 /*   Rapita Systems Ltd                     UK                            */
  15 /*   Evidence                               ITALY                         */
  16 /*                                                                        */
  17 /*   See http://www.frescor.org for a link to partners' websites          */
  18 /*                                                                        */
  19 /*          FRESCOR project (FP6/2005/IST/5-034026) is funded             */
  20 /*       in part by the European Union Sixth Framework Programme          */
  21 /*       The European Union is not liable of any use that may be          */
  22 /*       made of this code.                                               */
  23 /*                                                                        */
  24 /*                                                                        */
  25 /*  This file is part of FRSH (FRescor ScHeduler)                         */
  26 /*                                                                        */
  27 /* FRSH is free software; you can redistribute it and/or modify it        */
  28 /* under terms of the GNU General Public License as published by the      */
  29 /* Free Software Foundation; either version 2, or (at your option) any    */
  30 /* later version.  FRSH is distributed in the hope that it will be        */
  31 /* useful, but WITHOUT ANY WARRANTY; without even the implied warranty    */
  32 /* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU    */
  33 /* General Public License for more details. You should have received a    */
  34 /* copy of the GNU General Public License along with FRSH; see file       */
  35 /* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave,  */
  36 /* Cambridge, MA 02139, USA.                                              */
  37 /*                                                                        */
  38 /* As a special exception, including FRSH header files in a file,         */
  39 /* instantiating FRSH generics or templates, or linking other files       */
  40 /* with FRSH objects to produce an executable application, does not       */
  41 /* by itself cause the resulting executable application to be covered     */
  42 /* by the GNU General Public License. This exception does not             */
  43 /* however invalidate any other reasons why the executable file might be  */
  44 /* covered by the GNU Public License.                                     */
  45 /**************************************************************************/
  46
  47 /**
  48  * @file   frm_dummy.c
  49  * @author Michal Sojka <sojkam1@fel.cvut.cz>
  50  * @date   Wed Feb 18 16:06:04 2009
  51  *
  52  * @brief  Dummy resource manager implementation
  53  *
  54  *
  55  */
  56
  57
  58 #include <frm_generic.h>
  59 #include <forb.h>
  60 #include <error.h>
  61 #include <errno.h>
  62 #include <fres_sa_scenario.h>
  63 #include <stdbool.h>
  64 #include <ul_log.h>
  65 #include "res_dummy.h"
  66 #include <stdio.h>
  67 #include "dummy_config.h"
  68
  69 struct dummy_data {
  70         int some_data;
  71 };
  72
  73 int admission_test(struct fres_sa_scenario *scenario, void *priv, bool *schedulable)
  74 {
  75         struct dummy_data *data = priv;
  76         struct fres_sa_contract *c;
  77         int ret;
  78         long int utilization = 0;
  79
  80 #ifdef CONFIG_RESOURCE_DUMMY_VERBOSE
  81         printf("Admission test:\n");
  82 #endif
  83         data->some_data++;
  84
  85         fres_sa_scenario_for_each_no_cancel_contract(scenario, c) {
  86                 fres_block_basic *basic;
  87                 fres_block_dummy_sched *dummy_sched;
  88                 char id[40];
  89                 fres_contract_id_to_string(id, &c->id, sizeof(id));
  90 #ifdef CONFIG_RESOURCE_DUMMY_VERBOSE
  91                 printf("  %s contract: id=%s num_blocks=%d\n",
  92                        c->contract == c->new ? "new" : "old", id,
  93                        fres_contract_get_num_blocks(c->contract));
  94 #endif
  95
  96                 basic = fres_contract_get_basic(c->contract);
  97                 if (!basic) {
  98                         fprintf(stderr, "No basic block present\n");
  99                         return -1;
 100                 }
 101
 102                 if (c->contract == c->new) {
 103                         /* Add data for scheduler to the new contracts */
 104                         dummy_sched = malloc(sizeof(*dummy_sched));
 105                         if (!dummy_sched) return -1;
 106                         dummy_sched->priority = 100 - fosa_rel_time_to_msec(basic->budget);
 107                         ret = fres_contract_add_dummy_sched(c->contract, dummy_sched);
 108                         if (ret) {
 109                                 fprintf(stderr, "Cannot add dummy_sched block\n");
 110                                 return -1;
 111                         }
 112                 } else {
 113                         dummy_sched = fres_contract_get_dummy_sched(c->contract);
 114                         if (!dummy_sched) {
 115                                 fprintf(stderr, "Dummy_sched is not present\n");
 116                                 return -1;
 117                         }
 118                 }
 119 #ifdef CONFIG_RESOURCE_DUMMY_VERBOSE
 120                 printf("                period=%ld ms, budget=%ld ms, priority=%d\n",
 121                        fosa_rel_time_to_msec(basic->period),
 122                        fosa_rel_time_to_msec(basic->budget), dummy_sched->priority);
 123 #endif
 124                 utilization +=
 125                         1000*fosa_rel_time_to_msec(basic->budget) /
 126                         fosa_rel_time_to_msec(basic->period);
 127         }
 128         scenario->utilization = utilization/10;
 129         *schedulable = utilization < 1000;
 130
 131 #ifdef CONFIG_RESOURCE_DUMMY_VERBOSE
 132         printf("utilization=%ld.%03ld => %s\n", utilization/1000, utilization%1000,
 133                *schedulable?"schedulable":"not schedulable");
 134 #endif
 135
 136         return 0;
 137 }
 138
 139 struct dummy_data dummy_data;
 140
 141 static const struct fres_res_manager frm = {
 142         .res_type = DUMMY_RESOURCE_TYPE,
 143         .res_id = DUMMY_RESOURCE_ID,
 144         .admission_test = admission_test,
 145         .priv = &dummy_data,
 146         .name = "Dummy resource",
 147 };
 148
 149
 150 int main(int argc, char *argv[])
 151 {
 152         forb_orb orb;
 153         int ret;
 154         forb_init_attr_t attr = { .orb_id = "org.frescor.frm.dummy" };
 155         orb = forb_init(&argc, &argv, &attr);
 156         if (!orb) error(1, errno, "forb_init");
 157
 158         /* Register fres_block_dummy_sched to contract handling
 159          * functions */
 160         fres_block_register_dummy();
 161
 162 #ifndef CONFIG_RESOURCE_DUMMY_VERBOSE
 163         ulogd_frm_generic.level = UL_LOGL_ERR;
 164 #endif
 165
 166         ret = frm_register_and_run(orb, &frm);
 167
 168         if (ret != 0) {
 169                 error(1, errno, "frm_generic_run failed");
 170         }
 171
 172         return 0;
 173 }