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)
25 /* Create surf associated resource */
26 surf_vm_workstation_model->extension.vm_workstation.create(name, ind_phys_host);
28 smx_host_t smx_host = SIMIX_host_create(name, ind_phys_host, NULL);
30 /* We will be able to register the VM to its physical host, so that we can promptly
31 * retrieve the list VMs on the physical host. */
37 smx_host_t SIMIX_pre_vm_create(smx_simcall_t simcall, const char *name, smx_host_t ind_phys_host)
39 return SIMIX_vm_create(name, ind_phys_host);
43 /* works for VMs and PMs */
44 static long host_get_ramsize(smx_host_t vm, int *overcommit)
47 surf_workstation_model->extension.workstation.get_params(vm, ¶ms);
50 *overcommit = params.overcommit;
52 return params.ramsize;
55 /* **** start a VM **** */
56 static int __can_be_started(smx_host_t vm)
58 smx_host_t pm = surf_vm_workstation_model->extension.vm_workstation.get_pm(vm);
60 int pm_overcommit = 0;
61 long pm_ramsize = host_get_ramsize(pm, &pm_overcommit);
62 long vm_ramsize = host_get_ramsize(vm, NULL);
65 /* We assume users do not want to care about ramsize. */
70 XBT_INFO("%s allows memory overcommit.", pm->key);
74 long total_ramsize_of_vms = 0;
75 xbt_dynar_t dyn_vms = surf_workstation_model->extension.workstation.get_vms(pm);
77 unsigned int cursor = 0;
78 smx_host_t another_vm;
79 xbt_dynar_foreach(dyn_vms, cursor, another_vm) {
80 long another_vm_ramsize = host_get_ramsize(vm, NULL);
81 total_ramsize_of_vms += another_vm_ramsize;
85 if (vm_ramsize > pm_ramsize - total_ramsize_of_vms) {
86 XBT_WARN("cannnot start %s@%s due to memory shortage: vm_ramsize %ld, free %ld, pm_ramsize %ld (bytes).",
87 vm->key, pm->key, vm_ramsize, pm_ramsize - total_ramsize_of_vms, pm_ramsize);
88 xbt_dynar_free(&dyn_vms);
92 xbt_dynar_free(&dyn_vms);
96 void SIMIX_vm_start(smx_host_t ind_vm)
98 if (__can_be_started(ind_vm))
99 SIMIX_vm_set_state(ind_vm, SURF_VM_STATE_RUNNING);
101 THROWF(vm_error, 0, "The VM %s cannot be started", SIMIX_host_get_name(ind_vm));
106 void SIMIX_pre_vm_start(smx_simcall_t simcall, smx_host_t ind_vm)
108 SIMIX_vm_start(ind_vm);
109 SIMIX_simcall_answer(simcall);
112 /* ***** set/get state of a VM ***** */
113 void SIMIX_vm_set_state(smx_host_t ind_vm, int state)
115 /* jump to vm_ws_set_state */
116 surf_vm_workstation_model->extension.vm_workstation.set_state(ind_vm, state);
119 void SIMIX_pre_vm_set_state(smx_simcall_t simcall, smx_host_t ind_vm, int state)
121 SIMIX_vm_set_state(ind_vm, state);
124 int SIMIX_vm_get_state(smx_host_t ind_vm)
126 return surf_vm_workstation_model->extension.vm_workstation.get_state(ind_vm);
129 int SIMIX_pre_vm_get_state(smx_simcall_t simcall, smx_host_t ind_vm)
131 return SIMIX_vm_get_state(ind_vm);
136 * \brief Function to migrate a SIMIX VM host.
138 * \param host the vm host to migrate (a smx_host_t)
140 void SIMIX_vm_migrate(smx_host_t ind_vm, smx_host_t ind_dst_pm)
142 /* precopy migration makes the VM temporally paused */
143 e_surf_vm_state_t state = SIMIX_vm_get_state(ind_vm);
144 xbt_assert(state == SURF_VM_STATE_SUSPENDED);
146 /* jump to vm_ws_migrate(). this will update the vm location. */
147 surf_vm_workstation_model->extension.vm_workstation.migrate(ind_vm, ind_dst_pm);
150 void SIMIX_pre_vm_migrate(smx_simcall_t simcall, smx_host_t ind_vm, smx_host_t ind_dst_pm)
152 SIMIX_vm_migrate(ind_vm, ind_dst_pm);
153 SIMIX_simcall_answer(simcall);
158 * \brief Function to get the physical host of the given the SIMIX VM host.
160 * \param host the vm host to get_phys_host (a smx_host_t)
162 void *SIMIX_vm_get_pm(smx_host_t ind_vm)
164 /* jump to vm_ws_get_pm(). this will return the vm name. */
165 return surf_vm_workstation_model->extension.vm_workstation.get_pm(ind_vm);
168 void *SIMIX_pre_vm_get_pm(smx_simcall_t simcall, smx_host_t ind_vm)
170 return SIMIX_vm_get_pm(ind_vm);
175 * \brief Function to suspend a SIMIX VM host. This function stops the exection of the
176 * VM. All the processes on this VM will pause. The state of the VM is
177 * preserved on memory. We can later resume it again.
179 * \param host the vm host to suspend (a smx_host_t)
181 void SIMIX_vm_suspend(smx_host_t ind_vm, smx_process_t issuer)
183 const char *name = SIMIX_host_get_name(ind_vm);
185 if (SIMIX_vm_get_state(ind_vm) != SURF_VM_STATE_RUNNING)
186 THROWF(vm_error, 0, "VM(%s) is not running", name);
188 XBT_DEBUG("suspend VM(%s), where %d processes exist", name, xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
190 /* jump to vm_ws_suspend. The state will be set. */
191 surf_vm_workstation_model->extension.vm_workstation.suspend(ind_vm);
193 smx_process_t smx_process, smx_process_safe;
194 xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
195 XBT_DEBUG("suspend %s", smx_process->name);
196 SIMIX_process_suspend(smx_process, issuer);
199 XBT_DEBUG("suspend all processes on the VM done done");
202 void SIMIX_pre_vm_suspend(smx_simcall_t simcall, smx_host_t ind_vm)
204 if (simcall->issuer->smx_host == ind_vm) {
205 XBT_ERROR("cannot suspend the VM where I run");
209 SIMIX_vm_suspend(ind_vm, simcall->issuer);
211 /* without this, simcall_vm_suspend() does not return to the userland. why? */
212 SIMIX_simcall_answer(simcall);
214 XBT_DEBUG("SIMIX_pre_vm_suspend done");
219 * \brief Function to resume a SIMIX VM host. This function restart the execution of the
220 * VM. All the processes on this VM will run again.
222 * \param host the vm host to resume (a smx_host_t)
224 void SIMIX_vm_resume(smx_host_t ind_vm, smx_process_t issuer)
226 const char *name = SIMIX_host_get_name(ind_vm);
228 if (SIMIX_vm_get_state(ind_vm) != SURF_VM_STATE_SUSPENDED)
229 THROWF(vm_error, 0, "VM(%s) was not suspended", name);
231 XBT_DEBUG("resume VM(%s), where %d processes exist", name, xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
233 /* jump to vm_ws_resume() */
234 surf_vm_workstation_model->extension.vm_workstation.resume(ind_vm);
236 smx_process_t smx_process, smx_process_safe;
237 xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
238 XBT_DEBUG("resume %s", smx_process->name);
239 SIMIX_process_resume(smx_process, issuer);
243 void SIMIX_pre_vm_resume(smx_simcall_t simcall, smx_host_t ind_vm)
245 SIMIX_vm_resume(ind_vm, simcall->issuer);
246 SIMIX_simcall_answer(simcall);
251 * \brief Function to save a SIMIX VM host.
252 * This function is the same as vm_suspend, but the state of the VM is saved to the disk, and not preserved on memory.
253 * We can later restore it again.
255 * \param host the vm host to save (a smx_host_t)
257 void SIMIX_vm_save(smx_host_t ind_vm, smx_process_t issuer)
259 const char *name = SIMIX_host_get_name(ind_vm);
261 if (SIMIX_vm_get_state(ind_vm) != SURF_VM_STATE_RUNNING)
262 THROWF(vm_error, 0, "VM(%s) is not running", name);
265 XBT_DEBUG("save VM(%s), where %d processes exist", name, xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
267 /* jump to vm_ws_save() */
268 surf_vm_workstation_model->extension.vm_workstation.save(ind_vm);
270 smx_process_t smx_process, smx_process_safe;
271 xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
272 XBT_DEBUG("suspend %s", smx_process->name);
273 SIMIX_process_suspend(smx_process, issuer);
277 void SIMIX_pre_vm_save(smx_simcall_t simcall, smx_host_t ind_vm)
279 SIMIX_vm_save(ind_vm, simcall->issuer);
281 /* without this, simcall_vm_suspend() does not return to the userland. why? */
282 SIMIX_simcall_answer(simcall);
287 * \brief Function to restore a SIMIX VM host. This function restart the execution of the
288 * VM. All the processes on this VM will run again.
290 * \param host the vm host to restore (a smx_host_t)
292 void SIMIX_vm_restore(smx_host_t ind_vm, smx_process_t issuer)
294 const char *name = SIMIX_host_get_name(ind_vm);
296 if (SIMIX_vm_get_state(ind_vm) != SURF_VM_STATE_SAVED)
297 THROWF(vm_error, 0, "VM(%s) was not saved", name);
299 XBT_DEBUG("restore VM(%s), where %d processes exist", name, xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
301 /* jump to vm_ws_restore() */
302 surf_vm_workstation_model->extension.vm_workstation.resume(ind_vm);
304 smx_process_t smx_process, smx_process_safe;
305 xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
306 XBT_DEBUG("resume %s", smx_process->name);
307 SIMIX_process_resume(smx_process, issuer);
311 void SIMIX_pre_vm_restore(smx_simcall_t simcall, smx_host_t ind_vm)
313 SIMIX_vm_restore(ind_vm, simcall->issuer);
314 SIMIX_simcall_answer(simcall);
319 * \brief Function to shutdown a SIMIX VM host. This function powers off the
320 * VM. All the processes on this VM will be killed. But, the state of the VM is
321 * preserved on memory. We can later start it again.
323 * \param host the vm host to shutdown (a smx_host_t)
325 void SIMIX_vm_shutdown(smx_host_t ind_vm, smx_process_t issuer)
327 const char *name = SIMIX_host_get_name(ind_vm);
329 if (SIMIX_vm_get_state(ind_vm) != SURF_VM_STATE_RUNNING)
330 THROWF(vm_error, 0, "VM(%s) is not running", name);
332 XBT_DEBUG("%d processes in the VM", xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
334 smx_process_t smx_process, smx_process_safe;
335 xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
336 XBT_DEBUG("shutdown %s", name);
337 SIMIX_process_kill(smx_process, issuer);
340 /* FIXME: we may have to do something at the surf layer, e.g., vcpu action */
341 SIMIX_vm_set_state(ind_vm, SURF_VM_STATE_CREATED);
344 void SIMIX_pre_vm_shutdown(smx_simcall_t simcall, smx_host_t ind_vm)
346 SIMIX_vm_shutdown(ind_vm, simcall->issuer);
347 SIMIX_simcall_answer(simcall);
352 * \brief Function to destroy a SIMIX VM host.
354 * \param host the vm host to destroy (a smx_host_t)
356 void SIMIX_vm_destroy(smx_host_t ind_vm)
358 /* this code basically performs a similar thing like SIMIX_host_destroy() */
360 xbt_assert((ind_vm != NULL), "Invalid parameters");
361 const char *hostname = SIMIX_host_get_name(ind_vm);
363 /* this will call the registered callback function, i.e., SIMIX_host_destroy(). */
364 xbt_lib_unset(host_lib, hostname, SIMIX_HOST_LEVEL, 1);
366 /* jump to vm_ws_destroy(). The surf level resource will be freed. */
367 surf_vm_workstation_model->extension.vm_workstation.destroy(ind_vm);
370 void SIMIX_pre_vm_destroy(smx_simcall_t simcall, smx_host_t ind_vm)
372 SIMIX_vm_destroy(ind_vm);
373 SIMIX_simcall_answer(simcall);