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
  52   new_cpu("Cpu A", 20.0, 1.0, trace_A, SURF_CPU_ON, NULL);
  53   new_cpu("Cpu B", 100.0, 1.0, trace_B, SURF_CPU_ON, NULL);
  54 }
  55
  56 static void *name_service(const char *name)
  57 {
  58   void *cpu=NULL;
  59
  60   xbt_dict_get(cpu_set, name, &cpu);
  61
  62   return cpu;
  63 }
  64
  65 static const char *get_resource_name(void *resource_id)
  66 {
  67   return ((cpu_t) resource_id)->name;
  68 }
  69
  70 static int resource_used(void *resource_id)
  71 {
  72   return lmm_constraint_used(sys, ((cpu_t)resource_id)->constraint);
  73 }
  74
  75 static surf_action_t action_new(void *callback)
  76 {
  77   return NULL;
  78 }
  79
  80 static e_surf_action_state_t action_get_state(surf_action_t action)
  81 {
  82   return SURF_ACTION_NOT_IN_THE_SYSTEM;
  83 }
  84
  85 static void action_free(surf_action_t * action)
  86 {
  87   return;
  88 }
  89
  90 static void action_cancel(surf_action_t action)
  91 {
  92   return;
  93 }
  94
  95 static void action_recycle(surf_action_t action)
  96 {
  97   return;
  98 }
  99
 100 static void action_change_state(surf_action_t action, e_surf_action_state_t state)
 101 {
 102   surf_action_change_state(action, state);
 103   return;
 104 }
 105
 106 static xbt_heap_float_t share_resources()
 107 {
 108   surf_action_cpu_t action = NULL;
 109   xbt_swag_t running_actions= surf_cpu_resource->common_public->states.running_action_set;
 110   xbt_maxmin_float_t min = -1;
 111   xbt_maxmin_float_t value = -1;
 112   lmm_solve(sys);
 113
 114   action = xbt_swag_getFirst(running_actions);
 115   if(!action) return 0.0;
 116   value = lmm_variable_getvalue(action->variable);
 117   min = action->generic_action.remains / value ;
 118
 119   xbt_swag_foreach(action,running_actions) {
 120     value = action->generic_action.remains /
 121       lmm_variable_getvalue(action->variable);
 122     if(value<min) min=value;
 123   }
 124
 125   return min;
 126 }
 127
 128 static void update_actions_state(xbt_heap_float_t now,
 129                                  xbt_heap_float_t delta)
 130 {
 131   surf_action_cpu_t action = NULL;
 132   surf_action_cpu_t next_action = NULL;
 133   xbt_swag_t running_actions= surf_cpu_resource->common_public->states.running_action_set;
 134
 135   xbt_swag_foreach_safe(action, next_action, running_actions) {
 136     action->generic_action.remains -=
 137       lmm_variable_getvalue(action->variable)*delta;
 138 /*     if(action->generic_action.remains<.00001) action->generic_action.remains=0; */
 139     if(action->generic_action.remains<=0) {
 140       action_change_state((surf_action_t)action, SURF_ACTION_DONE);
 141     } /* else if(host_failed..) */
 142   }
 143
 144   return;
 145 }
 146
 147 static void update_resource_state(void *id,
 148                                   tmgr_trace_event_t event_type,
 149                                   xbt_maxmin_float_t value)
 150 {
 151   cpu_t cpu = id;
 152
 153   printf("Asking to update \"%s\" with value " XBT_MAXMIN_FLOAT_T " for event %p\n",
 154          cpu->name, value, event_type);
 155
 156   if(event_type==cpu->power_event) {
 157     cpu->current_power = value;
 158     lmm_update_constraint_bound(cpu->constraint,cpu->current_power * cpu->power_scale);
 159   } else if (event_type==cpu->state_event) {
 160     if(value>0) cpu->current_state = SURF_CPU_ON;
 161     else cpu->current_state = SURF_CPU_OFF;
 162   } else abort();
 163
 164   return;
 165 }
 166
 167 static surf_action_t execute(void *cpu, xbt_maxmin_float_t size)
 168 {
 169   lmm_variable_t var;
 170   surf_action_cpu_t action = NULL;
 171
 172   action=xbt_new0(s_surf_action_cpu_t,1);
 173
 174   action->generic_action.cost=size;
 175   action->generic_action.remains=size;
 176   action->generic_action.start=-1.0;
 177   action->generic_action.finish=-1.0;
 178   action->generic_action.callback=cpu;
 179   action->generic_action.resource_type=(surf_resource_t)surf_cpu_resource;
 180
 181   action->generic_action.state_set=surf_cpu_resource->common_public->states.running_action_set;
 182   xbt_swag_insert(action,action->generic_action.state_set);
 183
 184   action->variable = lmm_variable_new(sys, action, 1.0, -1.0, 1);
 185   lmm_expand(sys, ((cpu_t)cpu)->constraint, action->variable, 1.0);
 186
 187   return (surf_action_t) action;
 188 }
 189
 190 static e_surf_cpu_state_t get_state(void *cpu)
 191 {
 192   return SURF_CPU_OFF;
 193 }
 194
 195 static void surf_cpu_resource_init_internal(void)
 196 {
 197   s_surf_action_t action;
 198
 199   surf_cpu_resource = xbt_new0(s_surf_cpu_resource_t,1);
 200
 201   surf_cpu_resource->common_private = xbt_new0(s_surf_resource_private_t,1);
 202   surf_cpu_resource->common_public = xbt_new0(s_surf_resource_public_t,1);
 203 /*   surf_cpu_resource->extension_private = xbt_new0(s_surf_cpu_resource_extension_private_t,1); */
 204   surf_cpu_resource->extension_public = xbt_new0(s_surf_cpu_resource_extension_public_t,1);
 205
 206   surf_cpu_resource->common_public->states.ready_action_set=
 207     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 208   surf_cpu_resource->common_public->states.running_action_set=
 209     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 210   surf_cpu_resource->common_public->states.failed_action_set=
 211     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 212   surf_cpu_resource->common_public->states.done_action_set=
 213     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 214
 215   surf_cpu_resource->common_public->name_service = name_service;
 216   surf_cpu_resource->common_public->get_resource_name = get_resource_name;
 217   surf_cpu_resource->common_public->resource_used = resource_used;
 218   surf_cpu_resource->common_public->action_get_state=surf_action_get_state;
 219   surf_cpu_resource->common_public->action_free = action_free;
 220   surf_cpu_resource->common_public->action_cancel = action_cancel;
 221   surf_cpu_resource->common_public->action_recycle = action_recycle;
 222   surf_cpu_resource->common_public->action_change_state = action_change_state;
 223   surf_cpu_resource->common_private->share_resources = share_resources;
 224   surf_cpu_resource->common_private->update_actions_state = update_actions_state;
 225   surf_cpu_resource->common_private->update_resource_state = update_resource_state;
 226
 227   surf_cpu_resource->extension_public->execute = execute;
 228   surf_cpu_resource->extension_public->get_state = get_state;
 229
 230   cpu_set = xbt_dict_new();
 231
 232   sys = lmm_system_new();
 233 }
 234
 235 void surf_cpu_resource_init(const char* filename)
 236 {
 237   surf_cpu_resource_init_internal();
 238   parse_file(filename);
 239   xbt_dynar_push(resource_list, &surf_cpu_resource);
 240 }