src/surf/cpu.c

   1 /* Authors: Arnaud Legrand                                                  */
   2
   3 /* This program is free software; you can redistribute it and/or modify it
   4    under the terms of the license (GNU LGPL) which comes with this package. */
   5
   6 #include "cpu_private.h"
   7 #include "xbt/dict.h"
   8
   9 surf_cpu_resource_t surf_cpu_resource = NULL;
  10
  11 static xbt_dict_t cpu_set = NULL;
  12 static lmm_system_t sys = NULL;
  13
  14 /* power_scale is the basic power of the cpu when the cpu is
  15    completely available. initial_power is therefore expected to be
  16    comprised between 0.0 and 1.0, just as the values of power_trace.
  17    state_trace values mean SURF_CPU_ON if >0 and SURF_CPU_OFF
  18    otherwise.
  19 */
  20
  21 static void *new_cpu(const char *name, xbt_maxmin_float_t power_scale,
  22                       xbt_maxmin_float_t initial_power, tmgr_trace_t power_trace,
  23                       e_surf_cpu_state_t initial_state, tmgr_trace_t state_trace)
  24 {
  25   cpu_t cpu = xbt_new0(s_cpu_t,1);
  26
  27   cpu->resource = (surf_resource_t) surf_cpu_resource;
  28   cpu->name = name;
  29   cpu->power_scale = power_scale;
  30   cpu->current_power = initial_power;
  31 /*   cpu->power_trace = power_trace; */
  32   if(power_trace)
  33     cpu->power_event = tmgr_history_add_trace(history, power_trace, 0.0, 0, cpu);
  34
  35   cpu->current_state = initial_state;
  36 /*   cpu->state_trace = state_trace; */
  37   if(state_trace)
  38     cpu->state_event = tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
  39
  40   cpu->constraint = lmm_constraint_new(sys, cpu, cpu->current_power * cpu->power_scale);
  41
  42   xbt_dict_set(cpu_set, name, cpu, NULL);
  43
  44   return cpu;
  45 }
  46
  47 static void parse_file(const char *file)
  48 {
  49   tmgr_trace_t trace_A = tmgr_trace_new("trace_A.txt");
  50   tmgr_trace_t trace_B = tmgr_trace_new("trace_B.txt");
  51   tmgr_trace_t trace_A_failure = tmgr_trace_new("trace_A_failure.txt");
  52
  53   new_cpu("Cpu A", 100.0, 1.0, trace_A, SURF_CPU_ON, trace_A_failure);
  54   new_cpu("Cpu B", 100.0, 1.0, trace_B, SURF_CPU_ON, NULL);
  55 }
  56
  57 static void *name_service(const char *name)
  58 {
  59   void *cpu=NULL;
  60
  61   xbt_dict_get(cpu_set, name, &cpu);
  62
  63   return cpu;
  64 }
  65
  66 static const char *get_resource_name(void *resource_id)
  67 {
  68   return ((cpu_t) resource_id)->name;
  69 }
  70
  71 static int resource_used(void *resource_id)
  72 {
  73   return lmm_constraint_used(sys, ((cpu_t)resource_id)->constraint);
  74 }
  75
  76 static surf_action_t action_new(void *callback)
  77 {
  78   return NULL;
  79 }
  80
  81 static e_surf_action_state_t action_get_state(surf_action_t action)
  82 {
  83   return SURF_ACTION_NOT_IN_THE_SYSTEM;
  84 }
  85
  86 static void action_free(surf_action_t * action)
  87 {
  88   return;
  89 }
  90
  91 static void action_cancel(surf_action_t action)
  92 {
  93   return;
  94 }
  95
  96 static void action_recycle(surf_action_t action)
  97 {
  98   return;
  99 }
 100
 101 static void action_change_state(surf_action_t action, e_surf_action_state_t state)
 102 {
 103   surf_action_change_state(action, state);
 104   return;
 105 }
 106
 107 static xbt_heap_float_t share_resources()
 108 {
 109   surf_action_cpu_t action = NULL;
 110   xbt_swag_t running_actions= surf_cpu_resource->common_public->states.running_action_set;
 111   xbt_maxmin_float_t min = -1;
 112   xbt_maxmin_float_t value = -1;
 113   lmm_solve(sys);
 114
 115   action = xbt_swag_getFirst(running_actions);
 116   if(!action) return 0.0;
 117   value = lmm_variable_getvalue(action->variable);
 118   min = action->generic_action.remains / value ;
 119
 120   xbt_swag_foreach(action,running_actions) {
 121     value = action->generic_action.remains /
 122       lmm_variable_getvalue(action->variable);
 123     if(value<min) min=value;
 124   }
 125
 126   return min;
 127 }
 128
 129 static void update_actions_state(xbt_heap_float_t now,
 130                                  xbt_heap_float_t delta)
 131 {
 132   surf_action_cpu_t action = NULL;
 133   surf_action_cpu_t next_action = NULL;
 134   xbt_swag_t running_actions= surf_cpu_resource->common_public->states.running_action_set;
 135   xbt_swag_t failed_actions= surf_cpu_resource->common_public->states.failed_action_set;
 136
 137   xbt_swag_foreach_safe(action, next_action, running_actions) {
 138     action->generic_action.remains -=
 139       lmm_variable_getvalue(action->variable)*delta;
 140 /*     if(action->generic_action.remains<.00001) action->generic_action.remains=0; */
 141     if(action->generic_action.remains<=0) {
 142       action_change_state((surf_action_t)action, SURF_ACTION_DONE);
 143     } else { /* Need to check that none of the resource has failed*/
 144       lmm_constraint_t cnst = NULL;
 145       int tab_size =  lmm_get_number_of_cnst_from_var(sys, action->variable);
 146       int i=0;
 147       cpu_t cpu = NULL;
 148
 149       while((cnst=lmm_get_cnst_from_var(sys, action->variable, i++))) {
 150         cpu = lmm_constraint_id(cnst);
 151         if(cpu->current_state==SURF_CPU_OFF) {
 152           action_change_state((surf_action_t) action, SURF_ACTION_FAILED);
 153           break;
 154         }
 155       }
 156     }
 157   }
 158
 159   xbt_swag_foreach_safe(action, next_action, failed_actions) {
 160     lmm_variable_disable(sys, action->variable);
 161   }
 162
 163   return;
 164 }
 165
 166 static void update_resource_state(void *id,
 167                                   tmgr_trace_event_t event_type,
 168                                   xbt_maxmin_float_t value)
 169 {
 170   cpu_t cpu = id;
 171
 172   printf("[" XBT_HEAP_FLOAT_T "] Asking to update \"%s\" with value " XBT_MAXMIN_FLOAT_T " for event %p\n",
 173          surf_get_clock(), cpu->name, value, event_type);
 174
 175   if(event_type==cpu->power_event) {
 176     cpu->current_power = value;
 177     lmm_update_constraint_bound(cpu->constraint,cpu->current_power * cpu->power_scale);
 178   } else if (event_type==cpu->state_event) {
 179     if(value>0) cpu->current_state = SURF_CPU_ON;
 180     else cpu->current_state = SURF_CPU_OFF;
 181   } else abort();
 182
 183   return;
 184 }
 185
 186 static surf_action_t execute(void *cpu, xbt_maxmin_float_t size)
 187 {
 188   lmm_variable_t var;
 189   surf_action_cpu_t action = NULL;
 190   cpu_t CPU = cpu;
 191
 192   action=xbt_new0(s_surf_action_cpu_t,1);
 193
 194   action->generic_action.cost=size;
 195   action->generic_action.remains=size;
 196   action->generic_action.start=-1.0;
 197   action->generic_action.finish=-1.0;
 198   action->generic_action.callback=cpu;
 199   action->generic_action.resource_type=(surf_resource_t)surf_cpu_resource;
 200
 201   if(CPU->current_state==SURF_CPU_ON)
 202     action->generic_action.state_set=surf_cpu_resource->common_public->states.running_action_set;
 203   else
 204     action->generic_action.state_set=surf_cpu_resource->common_public->states.failed_action_set;
 205   xbt_swag_insert(action,action->generic_action.state_set);
 206
 207   action->variable = lmm_variable_new(sys, action, 1.0, -1.0, 1);
 208   lmm_expand(sys, ((cpu_t)cpu)->constraint, action->variable, 1.0);
 209
 210   return (surf_action_t) action;
 211 }
 212
 213 static e_surf_cpu_state_t get_state(void *cpu)
 214 {
 215   return SURF_CPU_OFF;
 216 }
 217
 218 static void surf_cpu_resource_init_internal(void)
 219 {
 220   s_surf_action_t action;
 221
 222   surf_cpu_resource = xbt_new0(s_surf_cpu_resource_t,1);
 223
 224   surf_cpu_resource->common_private = xbt_new0(s_surf_resource_private_t,1);
 225   surf_cpu_resource->common_public = xbt_new0(s_surf_resource_public_t,1);
 226 /*   surf_cpu_resource->extension_private = xbt_new0(s_surf_cpu_resource_extension_private_t,1); */
 227   surf_cpu_resource->extension_public = xbt_new0(s_surf_cpu_resource_extension_public_t,1);
 228
 229   surf_cpu_resource->common_public->states.ready_action_set=
 230     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 231   surf_cpu_resource->common_public->states.running_action_set=
 232     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 233   surf_cpu_resource->common_public->states.failed_action_set=
 234     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 235   surf_cpu_resource->common_public->states.done_action_set=
 236     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 237
 238   surf_cpu_resource->common_public->name_service = name_service;
 239   surf_cpu_resource->common_public->get_resource_name = get_resource_name;
 240   surf_cpu_resource->common_public->resource_used = resource_used;
 241   surf_cpu_resource->common_public->action_get_state=surf_action_get_state;
 242   surf_cpu_resource->common_public->action_free = action_free;
 243   surf_cpu_resource->common_public->action_cancel = action_cancel;
 244   surf_cpu_resource->common_public->action_recycle = action_recycle;
 245   surf_cpu_resource->common_public->action_change_state = action_change_state;
 246   surf_cpu_resource->common_private->share_resources = share_resources;
 247   surf_cpu_resource->common_private->update_actions_state = update_actions_state;
 248   surf_cpu_resource->common_private->update_resource_state = update_resource_state;
 249
 250   surf_cpu_resource->extension_public->execute = execute;
 251   surf_cpu_resource->extension_public->get_state = get_state;
 252
 253   cpu_set = xbt_dict_new();
 254
 255   sys = lmm_system_new();
 256 }
 257
 258 void surf_cpu_resource_init(const char* filename)
 259 {
 260   surf_cpu_resource_init_internal();
 261   parse_file(filename);
 262   xbt_dynar_push(resource_list, &surf_cpu_resource);
 263 }