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 static xbt_dict_t cpu_set = NULL;
  11 static lmm_system_t sys = NULL;
  12
  13 /* power_scale is the basic power of the cpu when the cpu is
  14    completely available. initial_power is therefore expected to be
  15    comprised between 0.0 and 1.0, just as the values of power_trace.
  16    state_trace values mean SURF_CPU_ON if >0 and SURF_CPU_OFF
  17    otherwise.
  18 */
  19
  20 static void *new_cpu(const char *name, xbt_maxmin_float_t power_scale,
  21                       xbt_maxmin_float_t initial_power, tmgr_trace_t power_trace,
  22                       e_surf_cpu_state_t initial_state, tmgr_trace_t state_trace)
  23 {
  24   cpu_t cpu = xbt_new0(s_cpu_t,1);
  25
  26   cpu->name = name;
  27   cpu->power_scale = power_scale;
  28   cpu->current_power = initial_power;
  29   cpu->power_trace = power_trace;
  30   if(power_trace) tmgr_history_add_trace(history, power_trace, 0.0, 0, cpu);
  31
  32   cpu->current_state = initial_state;
  33   cpu->state_trace = state_trace;
  34   if(state_trace) tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
  35
  36   cpu->constraint = lmm_constraint_new(sys, cpu, cpu->current_power * cpu->power_scale);
  37
  38   xbt_dict_set(cpu_set, name, cpu, NULL);
  39
  40   return cpu;
  41 }
  42
  43 static void parse_file(const char *file)
  44 {
  45   tmgr_trace_t trace_A = tmgr_trace_new("trace_A.txt");
  46   tmgr_trace_t trace_B = tmgr_trace_new("trace_B.txt");
  47
  48   new_cpu("Cpu A", 20.0, 1.0, trace_A, SURF_CPU_ON, NULL);
  49   new_cpu("Cpu B", 120.0, 1.0, trace_B, SURF_CPU_ON, NULL);
  50 }
  51
  52 static void *name_service(const char *name)
  53 {
  54   void *cpu=NULL;
  55
  56   xbt_dict_get(cpu_set, name, &cpu);
  57
  58   return cpu;
  59 }
  60
  61 static const char *get_resource_name(void *resource_id)
  62 {
  63   return ((cpu_t) resource_id)->name;
  64 }
  65
  66 static int resource_used(void *resource_id)
  67 {
  68   return lmm_constraint_used(sys, ((cpu_t)resource_id)->constraint);
  69 }
  70
  71 static surf_action_t action_new(void *callback)
  72 {
  73   return NULL;
  74 }
  75
  76 static e_surf_action_state_t action_get_state(surf_action_t action)
  77 {
  78   return SURF_ACTION_NOT_IN_THE_SYSTEM;
  79 }
  80
  81 static void action_free(surf_action_t * action)
  82 {
  83   return;
  84 }
  85
  86 static void action_cancel(surf_action_t action)
  87 {
  88   return;
  89 }
  90
  91 static void action_recycle(surf_action_t action)
  92 {
  93   return;
  94 }
  95
  96 static void action_change_state(surf_action_t action, e_surf_action_state_t state)
  97 {
  98   surf_action_change_state(action, state);
  99   return;
 100 }
 101
 102 static xbt_heap_float_t share_resources()
 103 {
 104   surf_action_cpu_t action = NULL;
 105   xbt_swag_t running_actions= surf_cpu_resource->resource.states.running_action_set;
 106   xbt_maxmin_float_t min = -1;
 107   xbt_maxmin_float_t value = -1;
 108   lmm_solve(sys);
 109
 110   action = xbt_swag_getFirst(running_actions);
 111   if(!action) return 0.0;
 112   value = lmm_variable_getvalue(action->variable);
 113   min = action->generic_action.remains / value ;
 114
 115   xbt_swag_foreach(action,running_actions) {
 116     value = action->generic_action.remains /
 117       lmm_variable_getvalue(action->variable);
 118     if(value<min) min=value;
 119   }
 120
 121   return min;
 122 }
 123
 124 static void update_state(xbt_heap_float_t now,
 125                          xbt_heap_float_t delta)
 126 {
 127   surf_action_cpu_t action = NULL;
 128   surf_action_cpu_t next_action = NULL;
 129   xbt_swag_t running_actions= surf_cpu_resource->resource.states.running_action_set;
 130
 131   xbt_swag_foreach_safe(action, next_action, running_actions) {
 132     action->generic_action.remains -=
 133       lmm_variable_getvalue(action->variable)*delta;
 134 /*     if(action->generic_action.remains<.00001) action->generic_action.remains=0; */
 135     if(action->generic_action.remains<=0) {
 136       action_change_state((surf_action_t)action, SURF_ACTION_DONE);
 137     } /* else if(host_failed..) */
 138   }
 139
 140   return;
 141 }
 142
 143 static surf_action_t execute(void *cpu, xbt_maxmin_float_t size)
 144 {
 145   lmm_variable_t var;
 146   surf_action_cpu_t action = NULL;
 147
 148   action=xbt_new0(s_surf_action_cpu_t,1);
 149
 150   action->generic_action.cost=size;
 151   action->generic_action.remains=size;
 152   action->generic_action.start=-1.0;
 153   action->generic_action.finish=-1.0;
 154   action->generic_action.callback=cpu;
 155   action->generic_action.resource_type=(surf_resource_t)surf_cpu_resource;
 156
 157   action->generic_action.state_set=surf_cpu_resource->resource.states.running_action_set;
 158   xbt_swag_insert(action,action->generic_action.state_set);
 159
 160   action->variable = lmm_variable_new(sys, action, 1.0, -1.0, 1);
 161   lmm_expand(sys, ((cpu_t)cpu)->constraint, action->variable, 1.0);
 162
 163   return (surf_action_t) action;
 164 }
 165
 166 static e_surf_cpu_state_t get_state(void *cpu)
 167 {
 168   return SURF_CPU_OFF;
 169 }
 170
 171 static surf_cpu_resource_t surf_cpu_resource_init_internal(void)
 172 {
 173   s_surf_action_t action;
 174
 175   surf_cpu_resource = xbt_new0(s_surf_cpu_resource_t,1);
 176
 177   surf_cpu_resource->resource.states.ready_action_set=
 178     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 179   surf_cpu_resource->resource.states.running_action_set=
 180     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 181   surf_cpu_resource->resource.states.failed_action_set=
 182     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 183   surf_cpu_resource->resource.states.done_action_set=
 184     xbt_swag_new(xbt_swag_offset(action,state_hookup));
 185
 186   surf_cpu_resource->resource.name_service = name_service;
 187   surf_cpu_resource->resource.get_resource_name = get_resource_name;
 188   surf_cpu_resource->resource.resource_used = resource_used;
 189   surf_cpu_resource->resource.action_get_state=surf_action_get_state;
 190   surf_cpu_resource->resource.action_free = action_free;
 191   surf_cpu_resource->resource.action_cancel = action_cancel;
 192   surf_cpu_resource->resource.action_recycle = action_recycle;
 193   surf_cpu_resource->resource.action_change_state = action_change_state;
 194   surf_cpu_resource->resource.share_resources = share_resources;
 195   surf_cpu_resource->resource.update_state = update_state;
 196
 197   surf_cpu_resource->execute = execute;
 198   surf_cpu_resource->get_state = get_state;
 199
 200   cpu_set = xbt_dict_new();
 201
 202   sys = lmm_system_new();
 203
 204   return surf_cpu_resource;
 205 }
 206
 207 void surf_cpu_resource_init(const char* filename)
 208 {
 209   surf_resource_t CPU = NULL;
 210
 211   surf_cpu_resource=surf_cpu_resource_init_internal();
 212   parse_file(filename);
 213   CPU = &(surf_cpu_resource->resource); /* to make short */
 214   xbt_dynar_push(resource_list, &CPU);
 215 }