1 /* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010. The SimGrid Team.
2 * All rights reserved. */
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. */
10 #include "surf_private.h"
11 #include "surf/surf_resource.h"
12 #include "simgrid/sg_config.h"
13 #include "workstation_private.h"
14 #include "surf/cpu_cas01_private.h"
15 #include "surf/maxmin_private.h"
19 * The workstation_VM2013 struct includes the workstation_CLM03 struct in
20 * its first member. The workstation_VM2013_t struct inherites all
21 * characteristics of the workstation_CLM03 struct. So, we can treat a
22 * workstation_VM2013 object as a workstation_CLM03 if necessary.
24 typedef struct workstation_VM2013 {
25 s_workstation_CLM03_t ws; /* a VM is a ''v''host */
27 /* The workstation object of the lower layer */
28 workstation_CLM03_t sub_ws; // Pointer to the ''host'' OS
30 e_surf_vm_state_t current_state;
33 surf_action_t cpu_action;
35 } s_workstation_VM2013_t, *workstation_VM2013_t;
37 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_vm_workstation, surf,
38 "Logging specific to the SURF VM workstation module");
43 surf_model_t surf_vm_workstation_model = NULL;
45 static void vm_ws_create(const char *name, void *ind_phys_workstation)
47 workstation_VM2013_t vm_ws = xbt_new0(s_workstation_VM2013_t, 1);
49 vm_ws->sub_ws = surf_workstation_resource_priv(ind_phys_workstation);
50 vm_ws->current_state = SURF_VM_STATE_CREATED;
53 // //// WORKSTATION RELATED STUFF ////
54 /* Create a workstation_CLM03 resource and register it to the system
55 Please note that the new ws is added into the host_lib. Then,
56 if you want to get a workstation_VM2013 object from host_lib, see
57 ws->generic_resouce.model->type first. If it is SURF_MODEL_TYPE_VM_WORKSTATION,
58 you can cast ws to vm_ws. */
60 __init_workstation_CLM03(&vm_ws->ws, name);
62 // Override the model with the current VM one.
63 vm_ws->ws.generic_resource.model = surf_vm_workstation_model;
66 // //// CPU RELATED STUFF ////
67 // Roughly, create a vcpu resource by using the values of the sub_cpu one.
68 cpu_Cas01_t sub_cpu = surf_cpu_resource_priv(ind_phys_workstation);
70 /* We can assume one core and cas01 cpu for the first step.
71 * Do xbt_lib_set(host_lib, name, SURF_CPU_LEVEL, cpu) if you get the resource.
73 cpu_cas01_create_resource(name, // name
74 sub_cpu->power_peak, // host->power_peak,
75 1, // host->power_scale,
76 NULL, // host->power_trace,
77 1, // host->core_amount,
78 SURF_RESOURCE_ON, // host->initial_state,
79 NULL, // host->state_trace,
80 NULL, // host->properties,
83 vm_ws->cpu_action = surf_cpu_model_pm->extension.cpu.execute(ind_phys_workstation, 0); // cost 0 is okay?
85 //// NET RELATED STUFF ////
86 // Bind virtual net_elm to the host
87 // TODO rebind each time you migrate a VM
88 // TODO check how network requests are scheduled between distinct processes competing for the same card.
89 // Please note that the __init_workstation_CLM03 invocation assigned NULL to ws.net_elm since no network elements
90 // were previously created for this hostname. Indeed all network elements are created during the SimGrid initialization phase by considering
92 vm_ws->ws.net_elm = xbt_lib_get_or_null(host_lib, vm_ws->sub_ws->generic_resource.name, ROUTING_HOST_LEVEL);
93 xbt_lib_set(host_lib, name, ROUTING_HOST_LEVEL, vm_ws->ws.net_elm);
95 // //// STORAGE RELATED STUFF ////
96 // ind means ''indirect'' that this is a reference on the whole dict_elm structure (i.e not on the surf_resource_private infos)
102 * Update the physical host of the given VM
104 static void vm_ws_migrate(void *ind_vm_workstation, void *ind_dest_phys_workstation)
106 /* ind_phys_workstation equals to smx_host_t */
107 workstation_VM2013_t vm_ws = surf_workstation_resource_priv(ind_vm_workstation);
112 vm_ws->sub_ws = surf_workstation_resource_priv(ind_dest_phys_workstation);
116 * A physical host does not disapper in the current SimGrid code, but a VM may
117 * disapper during a simulation.
119 static void vm_ws_destroy(void *ind_vm_workstation)
121 /* ind_phys_workstation equals to smx_host_t */
122 workstation_VM2013_t vm_ws = surf_workstation_resource_priv(ind_vm_workstation);
124 xbt_assert(vm_ws->ws.generic_resource.model == surf_vm_workstation_model);
127 int ret = surf_cpu_model_pm->action_unref(vm_ws->cpu_action);
128 xbt_assert(ret == 1, "Bug: some resource still remains");
131 const char *name = vm_ws->ws.generic_resource.name;
132 /* this will call surf_resource_free() */
133 xbt_lib_unset(host_lib, name, SURF_WKS_LEVEL);
135 xbt_free(vm_ws->ws.generic_resource.name);
139 static int vm_ws_get_state(void *ind_vm_ws){
140 return ((workstation_VM2013_t) surf_workstation_resource_priv(ind_vm_ws))->current_state;
143 static void vm_ws_set_state(void *ind_vm_ws, int state){
144 ((workstation_VM2013_t) surf_workstation_resource_priv(ind_vm_ws))->current_state=state;
148 // TODO Please fix it (if found is wrong, nothing is returned)
149 static double get_solved_value(surf_action_t cpu_action)
152 lmm_system_t pm_system = surf_workstation_model->model_private->maxmin_system;
153 lmm_variable_t var = NULL;
155 xbt_swag_foreach(var, &pm_system->variable_set) {
156 XBT_DEBUG("var id %p id_int %d double %f", var->id, var->id_int, var->value);
157 if (var->id == cpu_action) {
166 XBT_CRITICAL("bug: cannot found the solved variable of the action %p", cpu_action);
170 static double vm_ws_share_resources(surf_model_t workstation_model, double now)
172 /* 0. Make sure that we already calculated the resource share at the physical
175 unsigned int index_of_pm_ws_model = xbt_dynar_search(model_list_invoke, surf_workstation_model);
176 unsigned int index_of_vm_ws_model = xbt_dynar_search(model_list_invoke, surf_vm_workstation_model);
177 xbt_assert((index_of_pm_ws_model < index_of_vm_ws_model), "Cannot assume surf_workstation_model comes before");
179 /* Another option is that we call sub_ws->share_resource() here. The
180 * share_resource() function has no side-effect. We can call it here to
185 /* 1. Now we know how many resource should be assigned to each virtual
186 * machine. We update constraints of the virtual machine layer.
189 * If we have two virtual machine (VM1 and VM2) on a physical machine (PM1).
190 * X1 + X2 = C (Equation 1)
192 * the resource share of VM1: X1
193 * the resource share of VM2: X2
194 * the capacity of PM1: C
196 * Then, if we have two process (P1 and P2) on VM1.
197 * X1_1 + X1_2 = X1 (Equation 2)
199 * the resource share of P1: X1_1
200 * the resource share of P2: X1_2
201 * the capacity of VM1: X1
203 * Equation 1 was solved in the physical machine layer.
204 * Equation 2 is solved in the virtual machine layer (here).
205 * X1 must be passed to the virtual machine laye as a constraint value.
209 /* iterate for all hosts including virtual machines */
210 xbt_lib_cursor_t cursor;
213 xbt_lib_foreach(host_lib, cursor, key, ind_host) {
214 workstation_CLM03_t ws_clm03 = ind_host[SURF_WKS_LEVEL];
215 cpu_Cas01_t cpu_cas01 = ind_host[SURF_CPU_LEVEL];
217 /* skip if it is not a virtual machine */
220 if (ws_clm03->generic_resource.model != surf_vm_workstation_model)
222 xbt_assert(cpu_cas01, "cpu-less workstation");
224 /* It is a virtual machine, so we can cast it to workstation_VM2013_t */
225 workstation_VM2013_t ws_vm2013 = (workstation_VM2013_t) ws_clm03;
227 double solved_value = get_solved_value(ws_vm2013->cpu_action);
228 XBT_DEBUG("assign %f to vm %s @ pm %s", solved_value,
229 ws_clm03->generic_resource.name, ws_vm2013->sub_ws->generic_resource.name);
231 cpu_cas01->constraint->bound = solved_value;
235 /* 2. Calculate resource share at the virtual machine layer. */
236 return ws_share_resources(workstation_model, now);
241 * A surf level object will be useless in the upper layer. Returing the name
242 * will be simple and suffcient.
244 static const char *vm_ws_get_phys_host(void *ind_vm_ws)
246 workstation_VM2013_t vm_ws = surf_workstation_resource_priv(ind_vm_ws);
247 return vm_ws->sub_ws->generic_resource.name;
250 static void surf_vm_workstation_model_init_internal(void)
252 surf_model_t model = surf_model_init();
254 model->name = "Virtual Workstation";
255 model->type = SURF_MODEL_TYPE_VM_WORKSTATION;
257 model->extension.workstation.cpu_model = surf_cpu_model_vm;
259 model->extension.vm_workstation.create = vm_ws_create;
260 model->extension.vm_workstation.set_state = vm_ws_set_state;
261 model->extension.vm_workstation.get_state = vm_ws_get_state;
262 model->extension.vm_workstation.migrate = vm_ws_migrate;
263 model->extension.vm_workstation.get_phys_host = vm_ws_get_phys_host;
264 model->extension.vm_workstation.destroy = vm_ws_destroy;
266 model->model_private->share_resources = vm_ws_share_resources;
267 model->model_private->resource_used = ws_resource_used;
268 model->model_private->update_actions_state = ws_update_actions_state;
269 model->model_private->update_resource_state = ws_update_resource_state;
270 model->model_private->finalize = ws_finalize;
272 surf_vm_workstation_model = model;
275 void surf_vm_workstation_model_init()
277 surf_vm_workstation_model_init_internal();
278 xbt_dynar_push(model_list, &surf_vm_workstation_model);
279 xbt_dynar_push(model_list_invoke, &surf_vm_workstation_model);