src/surf/vm_workstation.c

   1 /* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #include "xbt/ex.h"
   8 #include "xbt/dict.h"
   9 #include "portable.h"
  10 #include "surf/surf_resource.h"
  11 #include "simgrid/sg_config.h"
  12
  13 #include "workstation_private.h"
  14
  15 typedef struct workstation_VM2013 {
  16   s_workstation_CLM03_t ws;    /* a VM is a ''v''host */
  17
  18   workstation_CLM03_t sub_ws;  // Pointer to the ''host'' OS
  19   e_msg_vm_state_t current_state;            // See include/msg/datatypes.h
  20 } s_workstation_VM2013_t, *workstation_VM2013_t;
  21
  22 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_vm_workstation, surf,
  23                                 "Logging specific to the SURF VM workstation module");
  24
  25
  26
  27
  28 surf_model_t surf_vm_workstation_model = NULL;
  29
  30 static void vm_ws_create(const char *name, void *ind_phys_workstation)
  31 {
  32   workstation_VM2013_t vm_ws = xbt_new0(s_workstation_VM2013_t, 1);
  33
  34   // //// WORKSTATION  RELATED STUFF ////
  35   __init_ws(&(vm_ws->ws), name);
  36   // Override the model with the current VM one.
  37   vm_ws->ws.generic_resource.model = surf_vm_workstation_model;
  38
  39   // //// CPU  RELATED STUFF ////
  40   // This can be done directly during the creation of the surf_vm_worsktation model if
  41   // we consider that there will be only one CPU model for one layer of virtualization.
  42   // However, if you want to provide several layers (i.e. a VM inside a VM hosted by a PM)
  43   // we should add a kind of table that stores the different CPU model.
  44   // vm_ws->ws->generic_resource.model.extension.cpu=cpu_model_cas01(VM level ? );
  45
  46  // //// NET RELATED STUFF ////
  47   // Bind virtual net_elm to the host
  48   // TODO rebind each time you migrate a VM
  49   // TODO check how network requests are scheduled between distinct processes competing for the same card.
  50   vm_ws->ws.net_elm=xbt_lib_get_or_null(host_lib,vm_ws->physical_ws->generic_resource.name,ROUTING_HOST_LEVEL);
  51   xbt_lib_set(host_lib, name, ROUTING_HOST_LEVEL, vm_ws->ws.net_elm);
  52
  53   // //// STORAGE RELATED STUFF ////
  54
  55   // ind means ''indirect'' that this is a reference on the whole dict_elm structure (i.e not on the surf_resource_private infos)
  56   vm_ws->physical_ws = surf_workstation_resource_priv(ind_phys_workstation);
  57   vm_ws->current_state=msg_vm_state_created,
  58   xbt_lib_set(host_lib, name, SURF_WKS_LEVEL, vm_ws);
  59
  60 }
  61
  62 /*
  63  * Update the physical host of the given VM
  64  */
  65 static void vm_ws_migrate(void *ind_vm_workstation, void *ind_dest_phys_workstation)
  66 {
  67    /* ind_phys_workstation equals to smx_host_t */
  68    workstation_VM2013_t vm_ws = surf_workstation_resource_priv(ind_vm_workstation);
  69    xbt_assert(vm_ws);
  70
  71    /* do something */
  72
  73    vm_ws->physical_workstation = surf_workstation_resource_priv(ind_dest_phys_workstation);
  74 }
  75
  76 /*
  77  * A physical host does not disapper in the current SimGrid code, but a VM may
  78  * disapper during a simulation.
  79  */
  80 static void vm_ws_destroy(void *ind_vm_workstation)
  81 {
  82         /* ind_phys_workstation equals to smx_host_t */
  83         workstation_VM2013_t vm_ws = surf_workstation_resource_priv(ind_vm_workstation);
  84         xbt_assert(vm_ws);
  85         xbt_assert(vm_ws->generic_resource.model == surf_vm_workstation_model);
  86
  87         const char *name = vm_ws->generic_resource.name;
  88         /* this will call surf_resource_free() */
  89         xbt_lib_unset(host_lib, name, SURF_WKS_LEVEL);
  90
  91         xbt_free(vm_ws->generic_resource.name);
  92         xbt_free(vm_ws);
  93 }
  94
  95 static int vm_ws_get_state(void *ind_vm_ws){
  96         return ((workstation_VM2013_t) surf_workstation_resource_priv(ind_vm_ws))->current_state;
  97 }
  98
  99 static void vm_ws_set_state(void *ind_vm_ws, int state){
 100          ((workstation_VM2013_t) surf_workstation_resource_priv(ind_vm_ws))->current_state=state;
 101 }
 102
 103
 104 static double vm_ws_share_resources(surf_model_t workstation_model, double now)
 105 {
 106   // Can be obsolete if you right can ensure that ws_model has been code previously
 107   // invoke ws_share_resources on the physical_lyer: sub_ws->ws_share_resources()
 108   {
 109     unsigned int index_of_pm_ws_model = xbt_dynar_search(model_list_invoke, surf_workstation_model);
 110     unsigned int index_of_vm_ws_model = xbt_dynar_search(model_list_invoke, surf_vm_workstation_model);
 111     xbt_assert((index_of_pm_ws_model < index_of_vm_ws_model), "Cannot assume surf_workstation_model comes before");
 112     /* we have to make sure that the share_resource() callback of the model of the lower layer must be called in advance. */
 113   }
 114
 115         // assign the corresponding value to X1, X2, ....
 116
 117    // invoke cpu and net share resources on layer (1)
 118         // return min;
 119   return -1.0;
 120 }
 121
 122
 123 /*
 124  * A surf level object will be useless in the upper layer. Returing the name
 125  * will be simple and suffcient.
 126  **/
 127 static const char *vm_ws_get_phys_host(void *ind_vm_ws)
 128 {
 129         workstation_VM2013_t vm_ws = surf_workstation_resource_priv(ind_vm_ws);
 130         return vm_ws->physical_workstation->name;
 131 }
 132
 133 static void surf_vm_workstation_model_init_internal(void)
 134 {
 135   surf_vm_workstation_model = surf_model_init();
 136
 137   surf_vm_workstation_model->name = "Virtual Workstation";
 138
 139   surf_vm_workstation_model->extension.vm_workstation.create = vm_ws_create;
 140   surf_vm_workstation_model->extension.vm_workstation.set_state = vm_ws_set_state;
 141   surf_vm_workstation_model->extension.vm_workstation.get_state = vm_ws_get_state;
 142   surf_vm_workstation_model->extension.vm_workstation.migrate = vm_ws_migrate;
 143   surf_vm_workstation_model->extension.vm_workstation.get_phys_host = vm_ws_get_phys_host;
 144   surf_vm_workstation_model->extension.vm_workstation.destroy = vm_ws_destroy;
 145
 146   surf_vm_workstation_model->model_private->share_resources = ws_share_resources;
 147 }
 148
 149 void surf_vm_workstation_model_init()
 150 {
 151   surf_vm_workstation_model_init_internal();
 152   xbt_dynar_push(model_list, &surf_vm_workstation_model);
 153   xbt_dynar_push(model_list_invoke, &surf_vm_workstation_model);
 154 }