resources/cpucg/mngr/frm_cgcpu.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 FRESCOR CPUCG (cpu control group)                */
  26 /*                                                                        */
  27 /* FWP 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.  FWP 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 FWP; 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 FWP header files in a file,          */
  39 /* instantiating FWP generics or templates, or linking other files        */
  40 /* with FWP 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   cpucg_mngr.c
  49  * @author Martin Molnar <molnam1@fel.cvut.cz>
  50  * @date   Wed Feb 18 16:24:43 2009
  51  *
  52  * @brief
  53  *
  54  *
  55  */
  56
  57 #include <frm_generic.h>
  58 #include <forb.h>
  59 #include <error.h>
  60 #include <errno.h>
  61 #include <fres_sa_scenario.h>
  62 #include <stdbool.h>
  63 #include <ul_log.h>
  64 #include <stdio.h>
  65
  66 UL_LOG_CUST(ulogd_frm_cpucg);
  67 ul_log_domain_t ulogd_fra_fwp = {UL_LOGL_DEB, "frm_cpucg"};
  68
  69 /**
  70  * root cgroup`s period
  71  */
  72 static unsigned int global_period_us;
  73 /**
  74  * root cgroup`s runtime
  75  */
  76 static unsigned int global_runtime_us;
  77
  78 static int cpucg_admtest(struct fres_sa_scenario *scenario, void *priv,
  79                                 bool *schedulable)
  80 {
  81         struct fres_sa_contract *c;
  82         long int period, budget;
  83         long int sum_utilization = 0;
  84
  85         fres_sa_scenario_for_each_no_cancel_contract(scenario, c) {
  86                 fres_block_basic *basic;
  87                 char id[40];
  88                 fres_contract_id_to_string(id, &c->contract->id, sizeof(id));
  89                 basic = fres_contract_get_basic(c->contract);
  90
  91                 period = fosa_rel_time_to_msec(basic->period);
  92                 budget = fosa_rel_time_to_msec(basic->budget);
  93                 printf("processing : id=%s, period=%ld ms, budget=%ld ms\n",
  94                        id,period, budget);
  95                 //ul_logdeb("processing : id=%s, period=%ld ms, budget=%ld ms\n",
  96                   //     id,period, budget);
  97
  98                 sum_utilization+= budget*100/period;
  99         }
 100         printf("sum_ut= %ld  global_ut=%ld \n", sum_utilization, ((long)global_runtime_us*100/global_period_us));
 101         *schedulable = (sum_utilization < (global_runtime_us*100/global_period_us));
 102         printf("=> %s\n", (*schedulable)?"schedulable":"not schedulable");
 103
 104         return 0;
 105 }
 106
 107 static const struct fres_res_manager frm = {
 108         .res_type = FRSH_RT_PROCESSOR,
 109         .res_id = 0,
 110         .name = "cgroup",
 111         .admission_test = cpucg_admtest,
 112         .priv = NULL
 113 };
 114
 115 int main(int argc, char *argv[])
 116 {
 117         forb_orb orb;
 118         FILE* fd;
 119         int ret;
 120
 121         orb = forb_init(&argc, &argv, "frm_cpucg");
 122         if (!orb) error(1, errno, "forb_init");
 123
 124         if (!(fd = fopen("/proc/sys/kernel/sched_rt_period_us", "r"))) {
 125                 error(1, errno, "frm_generic_run");
 126         }
 127         ret = fscanf(fd,"%d", &global_period_us);
 128         printf("sched_rt_period_us= %d\n", global_period_us);
 129         if (ret == 0 || ret == EOF) {
 130                 error(1, errno, "frm_generic_run");
 131         }
 132         fclose(fd);
 133
 134         if (!(fd = fopen("/proc/sys/kernel/sched_rt_runtime_us", "r"))) {
 135                 error(1, errno, "frm_generic_run");
 136         }
 137         ret = fscanf(fd,"%d", &global_runtime_us);
 138         printf("sched_rt_runtime_us= %d\n", global_runtime_us);
 139         if (ret == 0 || ret == EOF) {
 140                 error(1, errno, "frm_generic_run");
 141         }
 142         fclose(fd);
 143
 144         ret = frm_register_and_run(orb, &frm);
 145         if (ret != 0) {
 146                 error(1, errno, "frm_generic_run");
 147         }
 148
 149         return 0;
 150 }