1 /* Copyright (c) 2007-2012. 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. */
7 #include "smx_private.h"
8 #include "xbt/sysdep.h"
13 //If you need to log some stuffs, just uncomment these two lines and uses XBT_DEBUG for instance
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_vm, simix, "Logging specific to SIMIX (vms)");
16 /* **** create a VM **** */
19 * \brief Internal function to create a SIMIX host.
20 * \param name name of the host to create
21 * \param data some user data (may be NULL)
23 smx_host_t SIMIX_vm_create(const char *name, smx_host_t ind_phys_host)
26 smx_host_priv_t smx_host = xbt_new0(s_smx_host_priv_t, 1);
29 // TODO check why we do not have any VM here and why we have the host_proc_hookup ?
32 smx_host->data = NULL;
33 smx_host->process_list =
34 xbt_swag_new(xbt_swag_offset(proc, host_proc_hookup));
36 /* Update global variables */
37 xbt_lib_set(host_lib,name,SIMIX_HOST_LEVEL,smx_host);
39 /* Create surf associated resource */
40 // TODO change phys_host into the right workstation surf model
41 surf_vm_workstation_model->extension.vm_workstation.create(name, ind_phys_host);
43 return xbt_lib_get_elm_or_null(host_lib, name);
47 smx_host_t SIMIX_pre_vm_create(smx_simcall_t simcall, const char *name, smx_host_t ind_phys_host){
48 return SIMIX_vm_create(name, ind_phys_host);
52 static int get_host_property_as_integer(smx_host_t host, const char *name)
54 xbt_dict_t dict = simix_host_get_properties(host);
56 char *value = xbt_dict_get_or_null(dict, name);
62 /* **** start a VM **** */
63 static int __can_be_started(smx_host_t vm)
65 // TODO add checking code related to overcommitment or not.
67 int overcommit = get_host_property_as_integer("OverCommit");
68 int core_nb = get_host_property_as_integer("CORE_NB");
69 int mem_cap = get_host_property_as_integer("MEM_CAP");
70 int net_cap = get_host_property_as_integer("NET_CAP");
72 /* we need to get other VM objects on this physical host. */
79 void SIMIX_vm_start(smx_host_t ind_vm)
81 //TODO only start the VM if you can
82 if (__can_be_started(ind_vm))
83 SIMIX_vm_set_state(ind_vm, msg_vm_state_running);
85 THROWF(vm_error, 0, "The VM %s cannot be started", SIMIX_host_get_name(ind_vm));
88 void SIMIX_pre_vm_start(smx_simcall_t simcall, smx_host_t ind_vm)
90 SIMIX_vm_start(ind_vm);
93 /* ***** set/get state of a VM ***** */
94 void SIMIX_vm_set_state(smx_host_t ind_vm, int state)
96 surf_vm_workstation_model->extension.vm_workstation.set_state(ind_vm, state);
99 void SIMIX_pre_vm_set_state(smx_host_t ind_vm, int state)
101 SIMIX_vm_set_state(ind_vm, state);
104 int SIMIX_vm_get_state(smx_host_t ind_vm)
106 return surf_vm_workstation_model->extension.vm_workstation.get_state(ind_vm);
109 int SIMIX_pre_vm_get_state(smx_host_t ind_vm)
111 return SIMIX_vm_get_state(ind_vm);
116 * \brief Function to migrate a SIMIX VM host.
118 * \param host the vm host to migrate (a smx_host_t)
120 void SIMIX_vm_migrate(smx_host_t ind_vm, smx_host_t ind_dst_pm)
122 /* TODO: check state */
124 /* TODO: Using the variable of the MSG layer is not clean. */
125 SIMIX_vm_set_state(ind_vm, msg_vm_state_migrating);
127 /* jump to vm_ws_migrate(). this will update the vm location. */
128 surf_vm_workstation_model->extension.vm_workstation.migrate(ind_vm, ind_dst_pm);
130 SIMIX_vm_set_state(ind_vm, msg_vm_state_running);
133 void SIMIX_pre_vm_migrate(smx_simcall_t simcall, smx_host_t ind_vm, smx_host_t ind_dst_pm){
134 SIMIX_vm_migrate(ind_vm, ind_dst_pm);
139 * \brief Function to get the physical host of the given the SIMIX VM host.
141 * \param host the vm host to get_phys_host (a smx_host_t)
143 const char *SIMIX_vm_get_phys_host(smx_host_t ind_vm)
145 /* jump to vm_ws_get_phys_host(). this will return the vm name. */
146 return surf_vm_workstation_model->extension.vm_workstation.get_phys_host(ind_vm);
149 const char *SIMIX_pre_vm_get_phys_host(smx_simcall_t simcall, smx_host_t ind_vm){
150 return SIMIX_vm_get_phys_host(ind_vm);
155 * \brief Function to suspend a SIMIX VM host. This function stops the exection of the
156 * VM. All the processes on this VM will pause. The state of the VM is
157 * preserved on memory. We can later resume it again.
159 * \param host the vm host to suspend (a smx_host_t)
161 void SIMIX_vm_suspend(smx_host_t ind_vm)
163 /* TODO: check state */
165 XBT_DEBUG("%lu processes in the VM", xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
167 smx_process_t smx_process, smx_process_safe;
168 xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
169 XBT_DEBUG("suspend %s", SIMIX_host_get_name(ind_vm));
170 /* FIXME: calling a simcall from the SIMIX layer is strange. */
171 simcall_process_suspend(smx_process);
174 /* TODO: Using the variable of the MSG layer is not clean. */
175 SIMIX_vm_set_state(ind_vm, msg_vm_state_suspended);
178 void SIMIX_pre_vm_suspend(smx_simcall_t simcall, smx_host_t ind_vm){
179 SIMIX_vm_suspend(ind_vm);
184 * \brief Function to resume a SIMIX VM host. This function restart the execution of the
185 * VM. All the processes on this VM will run again.
187 * \param host the vm host to resume (a smx_host_t)
189 void SIMIX_vm_resume(smx_host_t ind_vm)
191 /* TODO: check state */
193 XBT_DEBUG("%lu processes in the VM", xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
195 smx_process_t smx_process, smx_process_safe;
196 xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
197 XBT_DEBUG("resume %s", SIMIX_host_get_name(ind_vm));
198 /* FIXME: calling a simcall from the SIMIX layer is strange. */
199 simcall_process_resume(smx_process);
202 /* TODO: Using the variable of the MSG layer is not clean. */
203 SIMIX_vm_set_state(ind_vm, msg_vm_state_running);
206 void SIMIX_pre_vm_resume(smx_simcall_t simcall, smx_host_t ind_vm){
207 SIMIX_vm_resume(ind_vm);
212 * \brief Function to save a SIMIX VM host.
213 * This function is the same as vm_suspend, but the state of the VM is saved to the disk, and not preserved on memory.
214 * We can later restore it again.
216 * \param host the vm host to save (a smx_host_t)
218 void SIMIX_vm_save(smx_host_t ind_vm)
220 /* TODO: check state */
222 XBT_DEBUG("%lu processes in the VM", xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
224 /* TODO: do something at the surf level */
226 smx_process_t smx_process, smx_process_safe;
227 xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
228 XBT_DEBUG("save %s", SIMIX_host_get_name(ind_vm));
229 /* FIXME: calling a simcall from the SIMIX layer is strange. */
230 simcall_process_save(smx_process);
233 /* TODO: Using the variable of the MSG layer is not clean. */
234 SIMIX_vm_set_state(ind_vm, msg_vm_state_saved);
237 void SIMIX_pre_vm_save(smx_simcall_t simcall, smx_host_t ind_vm){
238 SIMIX_vm_save(ind_vm);
243 * \brief Function to restore a SIMIX VM host. This function restart the execution of the
244 * VM. All the processes on this VM will run again.
246 * \param host the vm host to restore (a smx_host_t)
248 void SIMIX_vm_restore(smx_host_t ind_vm)
250 /* TODO: check state */
252 XBT_DEBUG("%lu processes in the VM", xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
254 /* TODO: do something at the surf level */
256 smx_process_t smx_process, smx_process_safe;
257 xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
258 XBT_DEBUG("restore %s", SIMIX_host_get_name(ind_vm));
259 /* FIXME: calling a simcall from the SIMIX layer is strange. */
260 simcall_process_restore(smx_process);
263 /* TODO: Using the variable of the MSG layer is not clean. */
264 SIMIX_vm_set_state(ind_vm, msg_vm_state_running);
267 void SIMIX_pre_vm_restore(smx_simcall_t simcall, smx_host_t ind_vm){
268 SIMIX_vm_restore(ind_vm);
273 * \brief Function to shutdown a SIMIX VM host. This function powers off the
274 * VM. All the processes on this VM will be killed. But, the state of the VM is
275 * preserved on memory. We can later start it again.
277 * \param host the vm host to shutdown (a smx_host_t)
279 void SIMIX_vm_shutdown(smx_host_t ind_vm, smx_process_t issuer)
281 /* TODO: check state */
283 XBT_DEBUG("%lu processes in the VM", xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
285 smx_process_t smx_process, smx_process_safe;
286 xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
287 XBT_DEBUG("kill %s", SIMIX_host_get_name(ind_vm));
289 SIMIX_process_kill(smx_process, issuer);
292 /* TODO: Using the variable of the MSG layer is not clean. */
293 SIMIX_vm_set_state(ind_vm, msg_vm_state_sleeping);
296 void SIMIX_pre_vm_shutdown(smx_simcall_t simcall, smx_host_t ind_vm){
297 SIMIX_vm_shutdown(ind_vm, simcall->issuer);
302 * \brief Function to destroy a SIMIX VM host.
304 * \param host the vm host to destroy (a smx_host_t)
306 void SIMIX_vm_destroy(smx_host_t ind_vm)
308 /* this code basically performs a similar thing like SIMIX_host_destroy() */
310 xbt_assert((ind_vm != NULL), "Invalid parameters");
311 const char *hostname = SIMIX_host_get_name(ind_vm);
313 smx_host_priv_t host_priv = SIMIX_host_priv(ind_vm);
315 /* this will call the registered callback function, i.e., SIMIX_host_destroy(). */
316 xbt_lib_unset(host_lib, hostname, SIMIX_HOST_LEVEL);
318 /* jump to vm_ws_destroy(). The surf level resource will be freed. */
319 surf_vm_workstation_model->extension.vm_workstation.destroy(ind_vm);
322 void SIMIX_pre_vm_destroy(smx_simcall_t simcall, smx_host_t ind_vm){
323 SIMIX_vm_destroy(ind_vm);