src/surf/cpu.c

   1 /*      $Id$     */
   2
   3 /* Copyright (c) 2004 Arnaud Legrand. All rights reserved.                  */
   4
   5 /* This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the license (GNU LGPL) which comes with this package. */
   7
   8 #include "cpu_private.h"
   9
  10 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(cpu, surf,
  11                                 "Logging specific to the SURF CPU module");
  12
  13 surf_cpu_resource_t surf_cpu_resource = NULL;
  14
  15 xbt_dict_t cpu_set = NULL;
  16
  17 static void cpu_free(void *CPU)
  18 {
  19 /*   cpu_t cpu = CPU; */
  20 /* lmm_constraint_free(maxmin_system,cpu->constraint); */
  21 /* Clean somewhere else ! */
  22
  23   xbt_free(CPU);
  24 }
  25
  26 /* power_scale is the basic power of the cpu when the cpu is
  27    completely available. power_initial is therefore expected to be
  28    comprised between 0.0 and 1.0, just as the values of power_trace.
  29    state_trace values mean SURF_CPU_ON if >0 and SURF_CPU_OFF
  30    otherwise.
  31 */
  32 static cpu_t cpu_new(const char *name, xbt_maxmin_float_t power_scale,
  33                      xbt_maxmin_float_t power_initial,
  34                      tmgr_trace_t power_trace,
  35                      e_surf_cpu_state_t state_initial,
  36                      tmgr_trace_t state_trace)
  37 {
  38   cpu_t cpu = xbt_new0(s_cpu_t, 1);
  39
  40   cpu->resource = (surf_resource_t) surf_cpu_resource;
  41   cpu->name = name;
  42   cpu->power_scale = power_scale;
  43   cpu->power_current = power_initial;
  44 /*   cpu->power_trace = power_trace; */
  45   if (power_trace)
  46     cpu->power_event =
  47         tmgr_history_add_trace(history, power_trace, 0.0, 0, cpu);
  48
  49   cpu->state_current = state_initial;
  50 /*   cpu->state_trace = state_trace; */
  51   if (state_trace)
  52     cpu->state_event =
  53         tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
  54
  55   cpu->constraint =
  56       lmm_constraint_new(maxmin_system, cpu,
  57                          cpu->power_current * cpu->power_scale);
  58
  59   xbt_dict_set(cpu_set, name, cpu, cpu_free);
  60
  61   return cpu;
  62 }
  63
  64 /*
  65    Semantic:  name       scale     initial     power     initial     state
  66                                     power      trace      state      trace
  67
  68    Token:   TOKEN_WORD TOKEN_WORD TOKEN_WORD TOKEN_WORD TOKEN_WORD TOKEN_WORD
  69    Type:     string      float      float      string     ON/OFF     string
  70 */
  71
  72 static void parse_cpu(void)
  73 {
  74   e_surf_token_t token;
  75   char *name = NULL;
  76   xbt_maxmin_float_t power_scale = 0.0;
  77   xbt_maxmin_float_t power_initial = 0.0;
  78   tmgr_trace_t power_trace = NULL;;
  79   e_surf_cpu_state_t state_initial = SURF_CPU_OFF;
  80   tmgr_trace_t state_trace = NULL;
  81
  82   name = xbt_strdup(surf_parse_text);
  83
  84   surf_parse_float(&power_scale);
  85   surf_parse_float(&power_initial);
  86   surf_parse_trace(&power_trace);
  87
  88   token = surf_parse();         /* state_initial */
  89   xbt_assert1((token == TOKEN_WORD), "Parse error line %d", line_pos);
  90   if (strcmp(surf_parse_text, "ON") == 0)
  91     state_initial = SURF_CPU_ON;
  92   else if (strcmp(surf_parse_text, "OFF") == 0)
  93     state_initial = SURF_CPU_OFF;
  94   else {
  95     CRITICAL2("Invalid cpu state (line %d): %s neq ON or OFF\n", line_pos,
  96               surf_parse_text);
  97     xbt_abort();
  98   }
  99
 100   surf_parse_trace(&state_trace);
 101
 102   cpu_new(name, power_scale, power_initial, power_trace, state_initial,
 103           state_trace);
 104 }
 105
 106 static void parse_file(const char *file)
 107 {
 108   e_surf_token_t token;
 109
 110   find_section(file, "CPU");
 111
 112   while (1) {
 113     token = surf_parse();
 114
 115     if (token == TOKEN_END_SECTION)
 116       break;
 117     if (token == TOKEN_NEWLINE)
 118       continue;
 119
 120     if (token == TOKEN_WORD)
 121       parse_cpu();
 122     else {
 123       CRITICAL1("Parse error line %d\n", line_pos);
 124       xbt_abort();
 125     }
 126   }
 127
 128   close_section("CPU");
 129 }
 130
 131 static void *name_service(const char *name)
 132 {
 133   void *cpu = NULL;
 134
 135   xbt_dict_get(cpu_set, name, &cpu);
 136
 137   return cpu;
 138 }
 139
 140 static const char *get_resource_name(void *resource_id)
 141 {
 142   return ((cpu_t) resource_id)->name;
 143 }
 144
 145 static int resource_used(void *resource_id)
 146 {
 147   return lmm_constraint_used(maxmin_system,
 148                              ((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,
 173                                 e_surf_action_state_t state)
 174 {
 175   surf_action_change_state(action, state);
 176   return;
 177 }
 178
 179 static xbt_heap_float_t share_resources(xbt_heap_float_t now)
 180 {
 181   s_surf_action_cpu_t action;
 182   return generic_maxmin_share_resources(surf_cpu_resource->common_public->
 183                                         states.running_action_set,
 184                                         xbt_swag_offset(action, variable));
 185 }
 186
 187 static void update_actions_state(xbt_heap_float_t now,
 188                                  xbt_heap_float_t delta)
 189 {
 190   surf_action_cpu_t action = NULL;
 191   surf_action_cpu_t next_action = NULL;
 192   xbt_swag_t running_actions =
 193       surf_cpu_resource->common_public->states.running_action_set;
 194   xbt_swag_t failed_actions =
 195       surf_cpu_resource->common_public->states.failed_action_set;
 196
 197   xbt_swag_foreach_safe(action, next_action, running_actions) {
 198     action->generic_action.remains -=
 199         lmm_variable_getvalue(action->variable) * delta;
 200     if (action->generic_action.max_duration != NO_MAX_DURATION)
 201       action->generic_action.max_duration -= delta;
 202 /*     if(action->generic_action.remains<.00001) action->generic_action.remains=0; */
 203     if (action->generic_action.remains <= 0) {
 204       action->generic_action.finish = surf_get_clock();
 205       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 206     } else if ((action->generic_action.max_duration != NO_MAX_DURATION) &&
 207                (action->generic_action.max_duration <= 0)) {
 208       action->generic_action.finish = surf_get_clock();
 209       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 210     } else {                    /* Need to check that none of the resource has failed */
 211       lmm_constraint_t cnst = NULL;
 212       int i = 0;
 213       cpu_t cpu = NULL;
 214
 215       while ((cnst =
 216               lmm_get_cnst_from_var(maxmin_system, action->variable,
 217                                     i++))) {
 218         cpu = lmm_constraint_id(cnst);
 219         if (cpu->state_current == SURF_CPU_OFF) {
 220           action->generic_action.finish = surf_get_clock();
 221           action_change_state((surf_action_t) action, SURF_ACTION_FAILED);
 222           break;
 223         }
 224       }
 225     }
 226   }
 227
 228   xbt_swag_foreach_safe(action, next_action, failed_actions) {
 229     lmm_variable_disable(maxmin_system, action->variable);
 230   }
 231
 232   return;
 233 }
 234
 235 static void update_resource_state(void *id,
 236                                   tmgr_trace_event_t event_type,
 237                                   xbt_maxmin_float_t value)
 238 {
 239   cpu_t cpu = id;
 240
 241 /*   printf("[" XBT_HEAP_FLOAT_T "] Asking to update CPU \"%s\" with value " */
 242 /*       XBT_MAXMIN_FLOAT_T " for event %p\n", surf_get_clock(), cpu->name, */
 243 /*       value, event_type); */
 244
 245   if (event_type == cpu->power_event) {
 246     cpu->power_current = value;
 247     lmm_update_constraint_bound(maxmin_system, cpu->constraint,
 248                                 cpu->power_current * cpu->power_scale);
 249   } else if (event_type == cpu->state_event) {
 250     if (value > 0)
 251       cpu->state_current = SURF_CPU_ON;
 252     else
 253       cpu->state_current = SURF_CPU_OFF;
 254   } else {
 255     CRITICAL0("Unknown event ! \n");
 256     xbt_abort();
 257   }
 258
 259   return;
 260 }
 261
 262 static surf_action_t execute(void *cpu, xbt_maxmin_float_t size)
 263 {
 264   surf_action_cpu_t action = NULL;
 265   cpu_t CPU = cpu;
 266
 267   action = xbt_new0(s_surf_action_cpu_t, 1);
 268
 269   action->generic_action.cost = size;
 270   action->generic_action.remains = size;
 271   action->generic_action.max_duration = NO_MAX_DURATION;
 272   action->generic_action.start = surf_get_clock();
 273   action->generic_action.finish = -1.0;
 274 /*   action->generic_action.callback = cpu; */
 275   action->generic_action.callback = NULL;
 276   action->generic_action.resource_type =
 277       (surf_resource_t) surf_cpu_resource;
 278
 279   if (CPU->state_current == SURF_CPU_ON)
 280     action->generic_action.state_set =
 281         surf_cpu_resource->common_public->states.running_action_set;
 282   else
 283     action->generic_action.state_set =
 284         surf_cpu_resource->common_public->states.failed_action_set;
 285   xbt_swag_insert(action, action->generic_action.state_set);
 286
 287   action->variable = lmm_variable_new(maxmin_system, action, 1.0, -1.0, 1);
 288   lmm_expand(maxmin_system, ((cpu_t) cpu)->constraint, action->variable,
 289              1.0);
 290
 291   return (surf_action_t) action;
 292 }
 293
 294 static surf_action_t action_sleep(void *cpu, xbt_maxmin_float_t duration)
 295 {
 296   surf_action_cpu_t action = NULL;
 297
 298   action = (surf_action_cpu_t) execute(cpu, 1.0);
 299   action->generic_action.max_duration = duration;
 300   lmm_update_variable_weight(maxmin_system, action->variable, 0.0);
 301
 302   return (surf_action_t) action;
 303 }
 304
 305 static void action_suspend(surf_action_t action)
 306 {
 307   lmm_update_variable_weight(maxmin_system,
 308                              ((surf_action_cpu_t) action)->variable, 0.0);
 309 }
 310
 311 static void action_resume(surf_action_t action)
 312 {
 313   lmm_update_variable_weight(maxmin_system,
 314                              ((surf_action_cpu_t) action)->variable, 1.0);
 315 }
 316
 317 static e_surf_cpu_state_t get_state(void *cpu)
 318 {
 319   return ((cpu_t) cpu)->state_current;
 320 }
 321
 322 static void finalize(void)
 323 {
 324   xbt_dict_free(&cpu_set);
 325   xbt_swag_free(surf_cpu_resource->common_public->states.ready_action_set);
 326   xbt_swag_free(surf_cpu_resource->common_public->states.
 327                 running_action_set);
 328   xbt_swag_free(surf_cpu_resource->common_public->states.
 329                 failed_action_set);
 330   xbt_swag_free(surf_cpu_resource->common_public->states.done_action_set);
 331   xbt_free(surf_cpu_resource->common_public);
 332   xbt_free(surf_cpu_resource->common_private);
 333   xbt_free(surf_cpu_resource->extension_public);
 334
 335   xbt_free(surf_cpu_resource);
 336   surf_cpu_resource = NULL;
 337 }
 338
 339 static void surf_cpu_resource_init_internal(void)
 340 {
 341   s_surf_action_t action;
 342
 343   surf_cpu_resource = xbt_new0(s_surf_cpu_resource_t, 1);
 344
 345   surf_cpu_resource->common_private =
 346       xbt_new0(s_surf_resource_private_t, 1);
 347   surf_cpu_resource->common_public = xbt_new0(s_surf_resource_public_t, 1);
 348
 349   surf_cpu_resource->extension_public =
 350       xbt_new0(s_surf_cpu_resource_extension_public_t, 1);
 351
 352   surf_cpu_resource->common_public->states.ready_action_set =
 353       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 354   surf_cpu_resource->common_public->states.running_action_set =
 355       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 356   surf_cpu_resource->common_public->states.failed_action_set =
 357       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 358   surf_cpu_resource->common_public->states.done_action_set =
 359       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 360
 361   surf_cpu_resource->common_public->name_service = name_service;
 362   surf_cpu_resource->common_public->get_resource_name = get_resource_name;
 363   surf_cpu_resource->common_public->action_get_state =
 364       surf_action_get_state;
 365   surf_cpu_resource->common_public->action_free = action_free;
 366   surf_cpu_resource->common_public->action_cancel = action_cancel;
 367   surf_cpu_resource->common_public->action_recycle = action_recycle;
 368   surf_cpu_resource->common_public->action_change_state =
 369       action_change_state;
 370   surf_cpu_resource->common_public->name = "CPU";
 371
 372   surf_cpu_resource->common_private->resource_used = resource_used;
 373   surf_cpu_resource->common_private->share_resources = share_resources;
 374   surf_cpu_resource->common_private->update_actions_state =
 375       update_actions_state;
 376   surf_cpu_resource->common_private->update_resource_state =
 377       update_resource_state;
 378   surf_cpu_resource->common_private->finalize = finalize;
 379
 380   surf_cpu_resource->extension_public->execute = execute;
 381   surf_cpu_resource->extension_public->sleep = action_sleep;
 382   surf_cpu_resource->extension_public->suspend = action_suspend;
 383   surf_cpu_resource->extension_public->resume = action_resume;
 384
 385   surf_cpu_resource->extension_public->get_state = get_state;
 386
 387   cpu_set = xbt_dict_new();
 388
 389   xbt_assert0(maxmin_system, "surf_init has to be called first!");
 390 }
 391
 392 void surf_cpu_resource_init(const char *filename)
 393 {
 394   if (surf_cpu_resource)
 395     return;
 396   surf_cpu_resource_init_internal();
 397   parse_file(filename);
 398   xbt_dynar_push(resource_list, &surf_cpu_resource);
 399 }