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 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(cpu, surf ,"Logging specific to the SURF CPU module");
  10
  11 surf_cpu_resource_t surf_cpu_resource = NULL;
  12
  13 static xbt_dict_t cpu_set = NULL;
  14
  15 /* power_scale is the basic power of the cpu when the cpu is
  16    completely available. initial_power is therefore expected to be
  17    comprised between 0.0 and 1.0, just as the values of power_trace.
  18    state_trace values mean SURF_CPU_ON if >0 and SURF_CPU_OFF
  19    otherwise.
  20 */
  21
  22 static void cpu_free(void *CPU){
  23   cpu_t cpu = CPU;
  24
  25 /* lmm_constraint_free(maxmin_system,cpu->constraint); */
  26 /* Clean somewhere else ! */
  27
  28   xbt_free(cpu);
  29 }
  30
  31 static void *cpu_new(const char *name, xbt_maxmin_float_t power_scale,
  32                       xbt_maxmin_float_t initial_power, tmgr_trace_t power_trace,
  33                       e_surf_cpu_state_t initial_state, tmgr_trace_t state_trace)
  34 {
  35   cpu_t cpu = xbt_new0(s_cpu_t,1);
  36
  37   cpu->resource = (surf_resource_t) surf_cpu_resource;
  38   cpu->name = name;
  39   cpu->power_scale = power_scale;
  40   cpu->current_power = initial_power;
  41 /*   cpu->power_trace = power_trace; */
  42   if(power_trace)
  43     cpu->power_event = tmgr_history_add_trace(history, power_trace, 0.0, 0, cpu);
  44
  45   cpu->current_state = initial_state;
  46 /*   cpu->state_trace = state_trace; */
  47   if(state_trace)
  48     cpu->state_event = tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
  49
  50   cpu->constraint = lmm_constraint_new(maxmin_system, cpu, cpu->current_power * cpu->power_scale);
  51
  52   xbt_dict_set(cpu_set, name, cpu, cpu_free);
  53
  54   return cpu;
  55 }
  56
  57 static void parse_file(const char *file)
  58 {
  59   tmgr_trace_t trace_A = tmgr_trace_new("trace_A.txt");
  60   tmgr_trace_t trace_B = tmgr_trace_new("trace_B.txt");
  61   tmgr_trace_t trace_A_failure = tmgr_trace_new("trace_A_failure.txt");
  62
  63   cpu_new("Cpu A", 100.0, 1.0, trace_A, SURF_CPU_ON, trace_A_failure);
  64   cpu_new("Cpu B", 100.0, 1.0, trace_B, SURF_CPU_ON, NULL);
  65 }
  66
  67 static void *name_service(const char *name)
  68 {
  69   void *cpu=NULL;
  70
  71   xbt_dict_get(cpu_set, name, &cpu);
  72
  73   return cpu;
  74 }
  75
  76 static const char *get_resource_name(void *resource_id)
  77 {
  78   return ((cpu_t) resource_id)->name;
  79 }
  80
  81 static int resource_used(void *resource_id)
  82 {
  83   return lmm_constraint_used(maxmin_system, ((cpu_t)resource_id)->constraint);
  84 }
  85
  86 static void action_free(surf_action_t action)
  87 {
  88   surf_action_cpu_t Action = (surf_action_cpu_t) action;
  89
  90   xbt_swag_remove(action,action->state_set);
  91   lmm_variable_free(maxmin_system,Action->variable);
  92   xbt_free(action);
  93
  94   return;
  95 }
  96
  97 static void action_cancel(surf_action_t action)
  98 {
  99   return;
 100 }
 101
 102 static void action_recycle(surf_action_t action)
 103 {
 104   return;
 105 }
 106
 107 static void action_change_state(surf_action_t action, e_surf_action_state_t state)
 108 {
 109   surf_action_change_state(action, state);
 110   return;
 111 }
 112
 113 static xbt_heap_float_t share_resources()
 114 {
 115   surf_action_cpu_t action = NULL;
 116   xbt_swag_t running_actions= surf_cpu_resource->common_public->states.running_action_set;
 117   xbt_maxmin_float_t min = -1;
 118   xbt_maxmin_float_t value = -1;
 119   lmm_solve(maxmin_system);
 120
 121   action = xbt_swag_getFirst(running_actions);
 122   if(!action) return 0.0;
 123   value = lmm_variable_getvalue(action->variable);
 124   min = action->generic_action.remains / value ;
 125
 126   xbt_swag_foreach(action,running_actions) {
 127     value = action->generic_action.remains /
 128       lmm_variable_getvalue(action->variable);
 129     if(value<min) min=value;
 130   }
 131
 132   return min;
 133 }
 134
 135 static void update_actions_state(xbt_heap_float_t now,
 136                                  xbt_heap_float_t delta)
 137 {
 138   surf_action_cpu_t action = NULL;
 139   surf_action_cpu_t next_action = NULL;
 140   xbt_swag_t running_actions= surf_cpu_resource->common_public->states.running_action_set;
 141   xbt_swag_t failed_actions= surf_cpu_resource->common_public->states.failed_action_set;
 142
 143   xbt_swag_foreach_safe(action, next_action, running_actions) {
 144     action->generic_action.remains -=
 145       lmm_variable_getvalue(action->variable)*delta;
 146 /*     if(action->generic_action.remains<.00001) action->generic_action.remains=0; */
 147     if(action->generic_action.remains<=0) {
 148       action_change_state((surf_action_t)action, SURF_ACTION_DONE);
 149     } else { /* Need to check that none of the resource has failed*/
 150       lmm_constraint_t cnst = NULL;
 151       int tab_size =  lmm_get_number_of_cnst_from_var(maxmin_system, action->variable);
 152       int i=0;
 153       cpu_t cpu = NULL;
 154
 155       while((cnst=lmm_get_cnst_from_var(maxmin_system, action->variable, i++))) {
 156         cpu = lmm_constraint_id(cnst);
 157         if(cpu->current_state==SURF_CPU_OFF) {
 158           action_change_state((surf_action_t) action, SURF_ACTION_FAILED);
 159           break;
 160         }
 161       }
 162     }
 163   }
 164
 165   xbt_swag_foreach_safe(action, next_action, failed_actions) {
 166     lmm_variable_disable(maxmin_system, action->variable);
 167   }
 168
 169   return;
 170 }
 171
 172 static void update_resource_state(void *id,
 173                                   tmgr_trace_event_t event_type,
 174                                   xbt_maxmin_float_t value)
 175 {
 176   cpu_t cpu = id;
 177
 178   printf("[" XBT_HEAP_FLOAT_T "] Asking to update \"%s\" with value " XBT_MAXMIN_FLOAT_T " for event %p\n",
 179          surf_get_clock(), cpu->name, value, event_type);
 180
 181   if(event_type==cpu->power_event) {
 182     cpu->current_power = value;
 183     lmm_update_constraint_bound(cpu->constraint,cpu->current_power * cpu->power_scale);
 184   } else if (event_type==cpu->state_event) {
 185     if(value>0) cpu->current_state = SURF_CPU_ON;
 186     else cpu->current_state = SURF_CPU_OFF;
 187   } else abort();
 188
 189   return;
 190 }
 191
 192 static surf_action_t execute(void *cpu, xbt_maxmin_float_t size)
 193 {
 194   lmm_variable_t var;
 195   surf_action_cpu_t action = NULL;
 196   cpu_t CPU = cpu;
 197
 198   action=xbt_new0(s_surf_action_cpu_t,1);
 199
 200   action->generic_action.cost=size;
 201   action->generic_action.remains=size;
 202   action->generic_action.start=-1.0;
 203   action->generic_action.finish=-1.0;
 204   action->generic_action.callback=cpu;
 205   action->generic_action.resource_type=(surf_resource_t)surf_cpu_resource;
 206
 207   if(CPU->current_state==SURF_CPU_ON)
 208     action->generic_action.state_set=surf_cpu_resource->common_public->states.running_action_set;
 209   else
 210     action->generic_action.state_set=surf_cpu_resource->common_public->states.failed_action_set;
 211   xbt_swag_insert(action,action->generic_action.state_set);
 212
 213   action->variable = lmm_variable_new(maxmin_system, action, 1.0, -1.0, 1);
 214   lmm_expand(maxmin_system, ((cpu_t)cpu)->constraint, action->variable, 1.0);
 215
 216   return (surf_action_t) action;
 217 }
 218
 219 static e_surf_cpu_state_t get_state(void *cpu)
 220 {
 221   return SURF_CPU_OFF;
 222 }
 223
 224 static void finalize(void)
 225 {
 226   xbt_dict_free(&cpu_set);
 227   xbt_swag_free(surf_cpu_resource->common_public->states.ready_action_set);
 228   xbt_swag_free(surf_cpu_resource->common_public->states.running_action_set);
 229   xbt_swag_free(surf_cpu_resource->common_public->states.failed_action_set);
 230   xbt_swag_free(surf_cpu_resource->common_public->states.done_action_set);
 231   xbt_free(surf_cpu_resource->common_public);
 232   xbt_free(surf_cpu_resource->common_private);
 233   xbt_free(surf_cpu_resource->extension_public);
 234
 235   xbt_free(surf_cpu_resource);
 236   surf_cpu_resource = NULL;
 237 }
 238
 239 static void surf_cpu_resource_init_internal(void)
 240 {
 241   s_surf_action_t action;
 242
 243   surf_cpu_resource = xbt_new0(s_surf_cpu_resource_t,1);
 244
 245   surf_cpu_resource->common_private = xbt_new0(s_surf_resource_private_t,1);
 246   surf_cpu_resource->common_public = xbt_new0(s_surf_resource_public_t,1);
 247 /*   surf_cpu_resource->extension_private = xbt_new0(s_surf_cpu_resource_extension_private_t,1); */
 248   surf_cpu_resource->extension_public = xbt_new0(s_surf_cpu_resource_extension_public_t,1);
 249
 250   surf_cpu_resource->common_public->states.ready_action_set=
 251     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 252   surf_cpu_resource->common_public->states.running_action_set=
 253     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 254   surf_cpu_resource->common_public->states.failed_action_set=
 255     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 256   surf_cpu_resource->common_public->states.done_action_set=
 257     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 258
 259   surf_cpu_resource->common_public->name_service = name_service;
 260   surf_cpu_resource->common_public->get_resource_name = get_resource_name;
 261   surf_cpu_resource->common_public->resource_used = resource_used;
 262   surf_cpu_resource->common_public->action_get_state=surf_action_get_state;
 263   surf_cpu_resource->common_public->action_free = action_free;
 264   surf_cpu_resource->common_public->action_cancel = action_cancel;
 265   surf_cpu_resource->common_public->action_recycle = action_recycle;
 266   surf_cpu_resource->common_public->action_change_state = action_change_state;
 267
 268   surf_cpu_resource->common_private->share_resources = share_resources;
 269   surf_cpu_resource->common_private->update_actions_state = update_actions_state;
 270   surf_cpu_resource->common_private->update_resource_state = update_resource_state;
 271   surf_cpu_resource->common_private->finalize = finalize;
 272
 273   surf_cpu_resource->extension_public->execute = execute;
 274   surf_cpu_resource->extension_public->get_state = get_state;
 275
 276   cpu_set = xbt_dict_new();
 277
 278   xbt_assert0(maxmin_system,"surf_init has to be called first!");
 279 }
 280
 281 void surf_cpu_resource_init(const char* filename)
 282 {
 283   surf_cpu_resource_init_internal();
 284   parse_file(filename);
 285   xbt_dynar_push(resource_list, &surf_cpu_resource);
 286 }