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 /*
  58    Semantic:  name       scale     initial     power     initial     state
  59                                     power      trace      state      trace
  60
  61    Token:   TOKEN_WORD TOKEN_WORD TOKEN_WORD TOKEN_WORD TOKEN_WORD TOKEN_WORD
  62    Type:     string      float      float      string     ON/OFF     string
  63 */
  64
  65 static void parse_host(void)
  66 {
  67   e_surf_token_t token;
  68   char *name = NULL;
  69   xbt_maxmin_float_t power_scale = 0.0;
  70   xbt_maxmin_float_t initial_power = 0.0;
  71   tmgr_trace_t power_trace = NULL;;
  72   e_surf_cpu_state_t initial_state = SURF_CPU_OFF;
  73   tmgr_trace_t state_trace = NULL;
  74
  75   name=xbt_strdup(surf_parse_text);
  76
  77   token=surf_parse(); /* power_scale */
  78   xbt_assert1((token==TOKEN_WORD),"Parse error line %d",line_pos);
  79   xbt_assert2((sscanf(surf_parse_text,XBT_MAXMIN_FLOAT_T, &power_scale)==1),
  80     "Parse error line %d : %s not a number",line_pos,surf_parse_text);
  81
  82   token=surf_parse(); /* initial_power */
  83   xbt_assert1((token==TOKEN_WORD),"Parse error line %d",line_pos);
  84   xbt_assert2((sscanf(surf_parse_text,XBT_MAXMIN_FLOAT_T, &initial_power)==1),
  85     "Parse error line %d : %s not a number",line_pos,surf_parse_text);
  86
  87   token=surf_parse(); /* power_trace */
  88   xbt_assert1((token==TOKEN_WORD),"Parse error line %d",line_pos);
  89   if(strcmp(surf_parse_text,"")==0) power_trace = NULL;
  90   else power_trace = tmgr_trace_new(surf_parse_text);
  91
  92   token=surf_parse(); /* initial_state */
  93   xbt_assert1((token==TOKEN_WORD),"Parse error line %d",line_pos);
  94   if(strcmp(surf_parse_text,"ON")==0) initial_state = SURF_CPU_ON;
  95   else if(strcmp(surf_parse_text,"OFF")==0) initial_state = SURF_CPU_OFF;
  96   else {
  97     CRITICAL2("Invalid cpu state (line %d): %s neq ON or OFF\n",line_pos,
  98               surf_parse_text);
  99     xbt_abort();
 100   }
 101
 102   token=surf_parse(); /* state_trace */
 103   xbt_assert1((token==TOKEN_WORD),"Parse error line %d",line_pos);
 104   if(strcmp(surf_parse_text,"")==0) state_trace = NULL;
 105   else state_trace = tmgr_trace_new(surf_parse_text);
 106
 107   cpu_new(name, power_scale, initial_power, power_trace, initial_state, state_trace);
 108 }
 109
 110 static void parse_file(const char *file)
 111 {
 112   e_surf_token_t token;
 113
 114   find_section(file,"CPU");
 115
 116   while(1) {
 117     token=surf_parse();
 118
 119     if(token==TOKEN_END_SECTION) break;
 120     if(token==TOKEN_NEWLINE) continue;
 121
 122     if(token==TOKEN_WORD) parse_host();
 123     else {
 124       CRITICAL1("Parse error line %d\n",line_pos);
 125       xbt_abort();
 126     }
 127   }
 128
 129   close_section("CPU");
 130 }
 131
 132 static void *name_service(const char *name)
 133 {
 134   void *cpu=NULL;
 135
 136   xbt_dict_get(cpu_set, name, &cpu);
 137
 138   return cpu;
 139 }
 140
 141 static const char *get_resource_name(void *resource_id)
 142 {
 143   return ((cpu_t) resource_id)->name;
 144 }
 145
 146 static int resource_used(void *resource_id)
 147 {
 148   return lmm_constraint_used(maxmin_system, ((cpu_t)resource_id)->constraint);
 149 }
 150
 151 static void action_free(surf_action_t action)
 152 {
 153   surf_action_cpu_t Action = (surf_action_cpu_t) action;
 154
 155   xbt_swag_remove(action,action->state_set);
 156   lmm_variable_free(maxmin_system,Action->variable);
 157   xbt_free(action);
 158
 159   return;
 160 }
 161
 162 static void action_cancel(surf_action_t action)
 163 {
 164   return;
 165 }
 166
 167 static void action_recycle(surf_action_t action)
 168 {
 169   return;
 170 }
 171
 172 static void action_change_state(surf_action_t action, e_surf_action_state_t state)
 173 {
 174   surf_action_change_state(action, state);
 175   return;
 176 }
 177
 178 static xbt_heap_float_t share_resources(xbt_heap_float_t now)
 179 {
 180   surf_action_cpu_t action = NULL;
 181   xbt_swag_t running_actions= surf_cpu_resource->common_public->states.running_action_set;
 182   xbt_maxmin_float_t min = -1;
 183   xbt_maxmin_float_t value = -1;
 184   lmm_solve(maxmin_system);
 185
 186   action = xbt_swag_getFirst(running_actions);
 187   if(!action) return 0.0;
 188   value = lmm_variable_getvalue(action->variable);
 189   min = action->generic_action.remains / value ;
 190
 191   xbt_swag_foreach(action,running_actions) {
 192     value = action->generic_action.remains /
 193       lmm_variable_getvalue(action->variable);
 194     if(value<min) min=value;
 195   }
 196
 197   return min;
 198 }
 199
 200 static void update_actions_state(xbt_heap_float_t now,
 201                                  xbt_heap_float_t delta)
 202 {
 203   surf_action_cpu_t action = NULL;
 204   surf_action_cpu_t next_action = NULL;
 205   xbt_swag_t running_actions= surf_cpu_resource->common_public->states.running_action_set;
 206   xbt_swag_t failed_actions= surf_cpu_resource->common_public->states.failed_action_set;
 207
 208   xbt_swag_foreach_safe(action, next_action, running_actions) {
 209     action->generic_action.remains -=
 210       lmm_variable_getvalue(action->variable)*delta;
 211 /*     if(action->generic_action.remains<.00001) action->generic_action.remains=0; */
 212     if(action->generic_action.remains<=0) {
 213       action_change_state((surf_action_t)action, SURF_ACTION_DONE);
 214     } else { /* Need to check that none of the resource has failed*/
 215       lmm_constraint_t cnst = NULL;
 216       int i=0;
 217       cpu_t cpu = NULL;
 218
 219       while((cnst=lmm_get_cnst_from_var(maxmin_system, action->variable, i++))) {
 220         cpu = lmm_constraint_id(cnst);
 221         if(cpu->current_state==SURF_CPU_OFF) {
 222           action_change_state((surf_action_t) action, SURF_ACTION_FAILED);
 223           break;
 224         }
 225       }
 226     }
 227   }
 228
 229   xbt_swag_foreach_safe(action, next_action, failed_actions) {
 230     lmm_variable_disable(maxmin_system, action->variable);
 231   }
 232
 233   return;
 234 }
 235
 236 static void update_resource_state(void *id,
 237                                   tmgr_trace_event_t event_type,
 238                                   xbt_maxmin_float_t value)
 239 {
 240   cpu_t cpu = id;
 241
 242   printf("[" XBT_HEAP_FLOAT_T "] Asking to update \"%s\" with value " XBT_MAXMIN_FLOAT_T " for event %p\n",
 243          surf_get_clock(), cpu->name, value, event_type);
 244
 245   if(event_type==cpu->power_event) {
 246     cpu->current_power = value;
 247     lmm_update_constraint_bound(cpu->constraint,cpu->current_power * cpu->power_scale);
 248   } else if (event_type==cpu->state_event) {
 249     if(value>0) cpu->current_state = SURF_CPU_ON;
 250     else cpu->current_state = SURF_CPU_OFF;
 251   } else {CRITICAL0("Unknown event ! \n");xbt_abort();}
 252
 253   return;
 254 }
 255
 256 static surf_action_t execute(void *cpu, xbt_maxmin_float_t size)
 257 {
 258   surf_action_cpu_t action = NULL;
 259   cpu_t CPU = cpu;
 260
 261   action=xbt_new0(s_surf_action_cpu_t,1);
 262
 263   action->generic_action.cost=size;
 264   action->generic_action.remains=size;
 265   action->generic_action.start=-1.0;
 266   action->generic_action.finish=-1.0;
 267   action->generic_action.callback=cpu;
 268   action->generic_action.resource_type=(surf_resource_t)surf_cpu_resource;
 269
 270   if(CPU->current_state==SURF_CPU_ON)
 271     action->generic_action.state_set=surf_cpu_resource->common_public->states.running_action_set;
 272   else
 273     action->generic_action.state_set=surf_cpu_resource->common_public->states.failed_action_set;
 274   xbt_swag_insert(action,action->generic_action.state_set);
 275
 276   action->variable = lmm_variable_new(maxmin_system, action, 1.0, -1.0, 1);
 277   lmm_expand(maxmin_system, ((cpu_t)cpu)->constraint, action->variable, 1.0);
 278
 279   return (surf_action_t) action;
 280 }
 281
 282 static e_surf_cpu_state_t get_state(void *cpu)
 283 {
 284   return SURF_CPU_OFF;
 285 }
 286
 287 static void finalize(void)
 288 {
 289   xbt_dict_free(&cpu_set);
 290   xbt_swag_free(surf_cpu_resource->common_public->states.ready_action_set);
 291   xbt_swag_free(surf_cpu_resource->common_public->states.running_action_set);
 292   xbt_swag_free(surf_cpu_resource->common_public->states.failed_action_set);
 293   xbt_swag_free(surf_cpu_resource->common_public->states.done_action_set);
 294   xbt_free(surf_cpu_resource->common_public);
 295   xbt_free(surf_cpu_resource->common_private);
 296   xbt_free(surf_cpu_resource->extension_public);
 297
 298   xbt_free(surf_cpu_resource);
 299   surf_cpu_resource = NULL;
 300 }
 301
 302 static void surf_cpu_resource_init_internal(void)
 303 {
 304   s_surf_action_t action;
 305
 306   surf_cpu_resource = xbt_new0(s_surf_cpu_resource_t,1);
 307
 308   surf_cpu_resource->common_private = xbt_new0(s_surf_resource_private_t,1);
 309   surf_cpu_resource->common_public = xbt_new0(s_surf_resource_public_t,1);
 310 /*   surf_cpu_resource->extension_private = xbt_new0(s_surf_cpu_resource_extension_private_t,1); */
 311   surf_cpu_resource->extension_public = xbt_new0(s_surf_cpu_resource_extension_public_t,1);
 312
 313   surf_cpu_resource->common_public->states.ready_action_set=
 314     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 315   surf_cpu_resource->common_public->states.running_action_set=
 316     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 317   surf_cpu_resource->common_public->states.failed_action_set=
 318     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 319   surf_cpu_resource->common_public->states.done_action_set=
 320     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 321
 322   surf_cpu_resource->common_public->name_service = name_service;
 323   surf_cpu_resource->common_public->get_resource_name = get_resource_name;
 324   surf_cpu_resource->common_public->resource_used = resource_used;
 325   surf_cpu_resource->common_public->action_get_state=surf_action_get_state;
 326   surf_cpu_resource->common_public->action_free = action_free;
 327   surf_cpu_resource->common_public->action_cancel = action_cancel;
 328   surf_cpu_resource->common_public->action_recycle = action_recycle;
 329   surf_cpu_resource->common_public->action_change_state = action_change_state;
 330
 331   surf_cpu_resource->common_private->share_resources = share_resources;
 332   surf_cpu_resource->common_private->update_actions_state = update_actions_state;
 333   surf_cpu_resource->common_private->update_resource_state = update_resource_state;
 334   surf_cpu_resource->common_private->finalize = finalize;
 335
 336   surf_cpu_resource->extension_public->execute = execute;
 337   surf_cpu_resource->extension_public->get_state = get_state;
 338
 339   cpu_set = xbt_dict_new();
 340
 341   xbt_assert0(maxmin_system,"surf_init has to be called first!");
 342 }
 343
 344 void surf_cpu_resource_init(const char* filename)
 345 {
 346   surf_cpu_resource_init_internal();
 347   parse_file(filename);
 348   xbt_dynar_push(resource_list, &surf_cpu_resource);
 349 }