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 "vm_workstation_private.h"
14 #include "surf/cpu_cas01_private.h"
15 #include "surf/maxmin_private.h"
17 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_vm_workstation, surf,
18 "Logging specific to the SURF VM workstation module");
21 surf_model_t surf_vm_workstation_model = NULL;
23 static void vm_ws_create(const char *name, void *ind_phys_workstation)
25 workstation_VM2013_t vm_ws = xbt_new0(s_workstation_VM2013_t, 1);
27 vm_ws->sub_ws = surf_workstation_resource_priv(ind_phys_workstation);
28 vm_ws->current_state = SURF_VM_STATE_CREATED;
31 // //// WORKSTATION RELATED STUFF ////
32 /* Create a workstation_CLM03 resource and register it to the system
33 Please note that the new ws is added into the host_lib. Then,
34 if you want to get a workstation_VM2013 object from host_lib, see
35 ws->generic_resouce.model->type first. If it is SURF_MODEL_TYPE_VM_WORKSTATION,
36 you can cast ws to vm_ws. */
38 __init_workstation_CLM03(&vm_ws->ws, name);
40 // Override the model with the current VM one.
41 vm_ws->ws.generic_resource.model = surf_vm_workstation_model;
44 // //// CPU RELATED STUFF ////
45 // Roughly, create a vcpu resource by using the values of the sub_cpu one.
46 cpu_Cas01_t sub_cpu = surf_cpu_resource_priv(ind_phys_workstation);
48 /* We can assume one core and cas01 cpu for the first step.
49 * Do xbt_lib_set(host_lib, name, SURF_CPU_LEVEL, cpu) if you get the resource.
51 cpu_cas01_create_resource(name, // name
52 sub_cpu->power_peak, // host->power_peak,
53 1, // host->power_scale,
54 NULL, // host->power_trace,
55 1, // host->core_amount,
56 SURF_RESOURCE_ON, // host->initial_state,
57 NULL, // host->state_trace,
58 NULL, // host->properties,
61 vm_ws->cpu_action = surf_cpu_model_pm->extension.cpu.execute(ind_phys_workstation, GUESTOS_NOISE);
63 //// NET RELATED STUFF ////
64 // Bind virtual net_elm to the host
65 // TODO rebind each time you migrate a VM
66 // TODO check how network requests are scheduled between distinct processes competing for the same card.
67 // Please note that the __init_workstation_CLM03 invocation assigned NULL to ws.net_elm since no network elements
68 // were previously created for this hostname. Indeed all network elements are created during the SimGrid initialization phase by considering
70 vm_ws->ws.net_elm = xbt_lib_get_or_null(host_lib, vm_ws->sub_ws->generic_resource.name, ROUTING_HOST_LEVEL);
71 xbt_lib_set(host_lib, name, ROUTING_HOST_LEVEL, vm_ws->ws.net_elm);
73 // //// STORAGE RELATED STUFF ////
74 // ind means ''indirect'' that this is a reference on the whole dict_elm structure (i.e not on the surf_resource_private infos)
80 * Update the physical host of the given VM
82 static void vm_ws_migrate(void *ind_vm_workstation, void *ind_dest_phys_workstation)
84 /* ind_phys_workstation equals to smx_host_t */
85 workstation_VM2013_t vm_ws = surf_workstation_resource_priv(ind_vm_workstation);
90 vm_ws->sub_ws = surf_workstation_resource_priv(ind_dest_phys_workstation);
94 * A physical host does not disapper in the current SimGrid code, but a VM may
95 * disapper during a simulation.
97 static void vm_ws_destroy(void *ind_vm_workstation)
99 /* ind_phys_workstation equals to smx_host_t */
100 workstation_VM2013_t vm_ws = surf_workstation_resource_priv(ind_vm_workstation);
102 xbt_assert(vm_ws->ws.generic_resource.model == surf_vm_workstation_model);
105 int ret = surf_cpu_model_pm->action_unref(vm_ws->cpu_action);
106 xbt_assert(ret == 1, "Bug: some resource still remains");
109 const char *name = vm_ws->ws.generic_resource.name;
110 /* this will call surf_resource_free() */
111 xbt_lib_unset(host_lib, name, SURF_WKS_LEVEL);
113 /* NOTE: surf_resource_free() frees vm_ws->ws.generic_resource.name and
114 * vm_ws->ws. Do not free them here. */
117 static int vm_ws_get_state(void *ind_vm_ws){
118 return ((workstation_VM2013_t) surf_workstation_resource_priv(ind_vm_ws))->current_state;
121 static void vm_ws_set_state(void *ind_vm_ws, int state){
122 ((workstation_VM2013_t) surf_workstation_resource_priv(ind_vm_ws))->current_state=state;
126 static double get_solved_value(surf_action_t cpu_action)
129 /* NOTE: Do not use surf_workstation_model's maxmin_system. It is not used. */
130 lmm_system_t pm_system = surf_cpu_model_pm->model_private->maxmin_system;
131 lmm_variable_t var = NULL;
133 xbt_swag_foreach(var, &pm_system->variable_set) {
134 XBT_DEBUG("var id %p id_int %d double %f", var->id, var->id_int, var->value);
135 if (var->id == cpu_action) {
144 XBT_CRITICAL("bug: cannot found the solved variable of the action %p", cpu_action);
146 return -1; /* NOT REACHED */
150 static double vm_ws_share_resources(surf_model_t workstation_model, double now)
152 /* 0. Make sure that we already calculated the resource share at the physical
155 unsigned int index_of_pm_ws_model = xbt_dynar_search(model_list_invoke, &surf_workstation_model);
156 unsigned int index_of_vm_ws_model = xbt_dynar_search(model_list_invoke, &surf_vm_workstation_model);
157 xbt_assert((index_of_pm_ws_model < index_of_vm_ws_model), "Cannot assume surf_workstation_model comes before");
159 /* Another option is that we call sub_ws->share_resource() here. The
160 * share_resource() function has no side-effect. We can call it here to
165 /* 1. Now we know how many resource should be assigned to each virtual
166 * machine. We update constraints of the virtual machine layer.
169 * If we have two virtual machine (VM1 and VM2) on a physical machine (PM1).
170 * X1 + X2 = C (Equation 1)
172 * the resource share of VM1: X1
173 * the resource share of VM2: X2
174 * the capacity of PM1: C
176 * Then, if we have two process (P1 and P2) on VM1.
177 * X1_1 + X1_2 = X1 (Equation 2)
179 * the resource share of P1: X1_1
180 * the resource share of P2: X1_2
181 * the capacity of VM1: X1
183 * Equation 1 was solved in the physical machine layer.
184 * Equation 2 is solved in the virtual machine layer (here).
185 * X1 must be passed to the virtual machine laye as a constraint value.
189 /* iterate for all hosts including virtual machines */
190 xbt_lib_cursor_t cursor;
193 xbt_lib_foreach(host_lib, cursor, key, ind_host) {
194 workstation_CLM03_t ws_clm03 = ind_host[SURF_WKS_LEVEL];
195 cpu_Cas01_t cpu_cas01 = ind_host[SURF_CPU_LEVEL];
197 /* skip if it is not a virtual machine */
200 if (ws_clm03->generic_resource.model != surf_vm_workstation_model)
202 xbt_assert(cpu_cas01, "cpu-less workstation");
204 /* It is a virtual machine, so we can cast it to workstation_VM2013_t */
205 workstation_VM2013_t ws_vm2013 = (workstation_VM2013_t) ws_clm03;
207 double solved_value = get_solved_value(ws_vm2013->cpu_action);
208 XBT_DEBUG("assign %f to vm %s @ pm %s", solved_value,
209 ws_clm03->generic_resource.name, ws_vm2013->sub_ws->generic_resource.name);
211 cpu_cas01->constraint->bound = solved_value;
215 /* 2. Calculate resource share at the virtual machine layer. */
216 double ret = ws_share_resources(workstation_model, now);
219 /* FIXME: 3. do we have to re-initialize our cpu_action object? */
221 /* iterate for all hosts including virtual machines */
222 xbt_lib_foreach(host_lib, cursor, key, ind_host) {
223 workstation_CLM03_t ws_clm03 = ind_host[SURF_WKS_LEVEL];
225 /* skip if it is not a virtual machine */
228 if (ws_clm03->generic_resource.model != surf_vm_workstation_model)
231 /* It is a virtual machine, so we can cast it to workstation_VM2013_t */
232 workstation_VM2013_t ws_vm2013 = (workstation_VM2013_t) ws_clm03;
234 void *ind_sub_host = xbt_lib_get_elm_or_null(host_lib, ws_vm2013->sub_ws->generic_resource.name);
235 surf_cpu_model_pm->action_unref(ws_vm2013->cpu_action);
236 ws_vm2013->cpu_action = surf_cpu_model_pm->extension.cpu.execute(ind_sub_host, 100); // cost 0 is okay?
247 * A surf level object will be useless in the upper layer. Returing the name
248 * will be simple and suffcient.
250 static const char *vm_ws_get_phys_host(void *ind_vm_ws)
252 workstation_VM2013_t vm_ws = surf_workstation_resource_priv(ind_vm_ws);
253 return vm_ws->sub_ws->generic_resource.name;
256 static void surf_vm_workstation_model_init_internal(void)
258 surf_model_t model = surf_model_init();
260 model->name = "Virtual Workstation";
261 model->type = SURF_MODEL_TYPE_VM_WORKSTATION;
262 // model->action_unref = ws_action_unref;
263 // model->action_cancel = ws_action_cancel;
264 // model->action_state_set = ws_action_state_set;
267 model->model_private->share_resources = vm_ws_share_resources;
268 model->model_private->resource_used = ws_resource_used;
269 model->model_private->update_actions_state = ws_update_actions_state;
270 model->model_private->update_resource_state = ws_update_resource_state;
271 model->model_private->finalize = ws_finalize;
274 // model->suspend = ws_action_suspend;
275 // model->resume = ws_action_resume;
276 // model->is_suspended = ws_action_is_suspended;
277 // model->set_max_duration = ws_action_set_max_duration;
278 model->set_priority = ws_action_set_priority;
279 // #ifdef HAVE_TRACING
280 // model->set_category = ws_action_set_category;
282 // model->get_remains = ws_action_get_remains;
283 // #ifdef HAVE_LATENCY_BOUND_TRACKING
284 // model->get_latency_limited = ws_get_latency_limited;
293 xbt_assert(surf_cpu_model_vm);
294 model->extension.workstation.cpu_model = surf_cpu_model_vm;
296 model->extension.workstation.execute = ws_execute;
297 // model->extension.workstation.sleep = ws_action_sleep;
298 model->extension.workstation.get_state = ws_get_state;
299 // model->extension.workstation.get_speed = ws_get_speed;
300 // model->extension.workstation.get_available_speed = ws_get_available_speed;
302 // model->extension.workstation.communicate = ws_communicate;
303 // model->extension.workstation.get_route = ws_get_route;
304 // model->extension.workstation.execute_parallel_task = ws_execute_parallel_task;
305 // model->extension.workstation.get_link_bandwidth = ws_get_link_bandwidth;
306 // model->extension.workstation.get_link_latency = ws_get_link_latency;
307 // model->extension.workstation.link_shared = ws_link_shared;
308 // model->extension.workstation.get_properties = ws_get_properties;
310 // model->extension.workstation.open = ws_action_open;
311 // model->extension.workstation.close = ws_action_close;
312 // model->extension.workstation.read = ws_action_read;
313 // model->extension.workstation.write = ws_action_write;
314 // model->extension.workstation.stat = ws_action_stat;
315 // model->extension.workstation.unlink = ws_action_unlink;
316 // model->extension.workstation.ls = ws_action_ls;
319 model->extension.vm_workstation.create = vm_ws_create;
320 model->extension.vm_workstation.set_state = vm_ws_set_state;
321 model->extension.vm_workstation.get_state = vm_ws_get_state;
322 model->extension.vm_workstation.migrate = vm_ws_migrate;
323 model->extension.vm_workstation.get_phys_host = vm_ws_get_phys_host;
324 model->extension.vm_workstation.destroy = vm_ws_destroy;
326 surf_vm_workstation_model = model;
329 void surf_vm_workstation_model_init()
331 surf_vm_workstation_model_init_internal();
332 xbt_dynar_push(model_list, &surf_vm_workstation_model);
333 xbt_dynar_push(model_list_invoke, &surf_vm_workstation_model);