1 /* Copyright (c) 2007-2015. 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"
12 #include "src/surf/host_interface.hpp"
13 #include "src/surf/virtual_machine.hpp"
15 //If you need to log some stuffs, just uncomment these two lines and uses XBT_DEBUG for instance
16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_vm, simix, "Logging specific to SIMIX (vms)");
18 /* **** create a VM **** */
21 * \brief Internal function to create a SIMIX host.
22 * \param name name of the host to create
23 * \param data some user data (may be NULL)
25 sg_host_t SIMIX_vm_create(const char *name, sg_host_t ind_phys_host)
27 /* Create surf associated resource */
28 surf_vm_model_create(name, ind_phys_host);
29 sg_host_t host = sg_host_by_name(name);
30 SIMIX_host_create(host);
32 /* We will be able to register the VM to its physical host, so that we can promptly
33 * retrieve the list VMs on the physical host. */
39 /* works for VMs and PMs */
40 static long host_get_ramsize(sg_host_t vm, int *overcommit)
43 surf_host_get_params(vm, ¶ms);
46 *overcommit = params.overcommit;
48 return params.ramsize;
51 /* **** start a VM **** */
52 static int __can_be_started(sg_host_t vm)
54 sg_host_t pm = surf_vm_get_pm(vm);
56 int pm_overcommit = 0;
57 long pm_ramsize = host_get_ramsize(pm, &pm_overcommit);
58 long vm_ramsize = host_get_ramsize(vm, NULL);
61 /* We assume users do not want to care about ramsize. */
66 XBT_INFO("%s allows memory overcommit.", sg_host_get_name(pm));
70 long total_ramsize_of_vms = 0;
71 xbt_dynar_t dyn_vms = surf_host_get_vms(pm);
73 unsigned int cursor = 0;
75 xbt_dynar_foreach(dyn_vms, cursor, another_vm) {
76 long another_vm_ramsize = host_get_ramsize(vm, NULL);
77 total_ramsize_of_vms += another_vm_ramsize;
81 if (vm_ramsize > pm_ramsize - total_ramsize_of_vms) {
82 XBT_WARN("cannnot start %s@%s due to memory shortage: vm_ramsize %ld, free %ld, pm_ramsize %ld (bytes).",
83 sg_host_get_name(vm), sg_host_get_name(pm),
84 vm_ramsize, pm_ramsize - total_ramsize_of_vms, pm_ramsize);
85 xbt_dynar_free(&dyn_vms);
89 xbt_dynar_free(&dyn_vms);
93 void SIMIX_vm_start(sg_host_t ind_vm)
95 if (__can_be_started(ind_vm))
96 static_cast<simgrid::surf::VirtualMachine*>(surf_host_resource_priv(ind_vm))
97 ->setState(SURF_VM_STATE_RUNNING);
99 THROWF(vm_error, 0, "The VM %s cannot be started", SIMIX_host_get_name(ind_vm));
103 e_surf_vm_state_t SIMIX_vm_get_state(sg_host_t ind_vm)
105 return static_cast<simgrid::surf::VirtualMachine*>(surf_host_resource_priv(ind_vm))->getState();
109 * \brief Function to migrate a SIMIX VM host.
111 * \param host the vm host to migrate (a sg_host_t)
113 void SIMIX_vm_migrate(sg_host_t ind_vm, sg_host_t ind_dst_pm)
115 /* precopy migration makes the VM temporally paused */
116 xbt_assert(SIMIX_vm_get_state(ind_vm) == SURF_VM_STATE_SUSPENDED);
118 /* jump to vm_ws_xigrate(). this will update the vm location. */
119 surf_vm_migrate(ind_vm, ind_dst_pm);
123 * \brief Encompassing simcall to prevent the removal of the src or the dst node at the end of a VM migration
124 * The simcall actually invokes the following calls:
125 * simcall_vm_set_affinity(vm, src_pm, 0);
126 * simcall_vm_migrate(vm, dst_pm);
127 * simcall_vm_resume(vm);
129 * It is called at the end of the migration_rx_fun function from msg/msg_vm.c
131 * \param vm VM to migrate
132 * \param src_pm Source physical host
133 * \param dst_pmt Destination physical host
135 void SIMIX_vm_migratefrom_resumeto(sg_host_t vm, sg_host_t src_pm, sg_host_t dst_pm)
137 /* deinstall the current affinity setting for the CPU */
138 SIMIX_vm_set_affinity(vm, src_pm, 0);
140 /* Update the vm location */
141 SIMIX_vm_migrate(vm, dst_pm);
144 smx_process_t self = SIMIX_process_self();
145 SIMIX_vm_resume(vm, self->simcall.issuer);
149 * \brief Function to get the physical host of the given SIMIX VM host.
151 * \param host the vm host to get_phys_host (a sg_host_t)
153 void *SIMIX_vm_get_pm(sg_host_t ind_vm)
155 /* jump to vm_ws_get_pm(). this will return the vm name. */
156 return surf_vm_get_pm(ind_vm);
160 * \brief Function to set the CPU bound of the given SIMIX VM host.
162 * \param host the vm host (a sg_host_t)
163 * \param bound bound (a double)
165 void SIMIX_vm_set_bound(sg_host_t ind_vm, double bound)
167 /* jump to vm_ws_set_vm_bound(). */
168 surf_vm_set_bound(ind_vm, bound);
172 * \brief Function to set the CPU affinity of the given SIMIX VM host.
174 * \param host the vm host (a sg_host_t)
175 * \param host the pm host (a sg_host_t)
176 * \param mask affinity mask (a unsigned long)
178 void SIMIX_vm_set_affinity(sg_host_t ind_vm, sg_host_t ind_pm, unsigned long mask)
180 /* make sure this at the MSG layer. */
181 xbt_assert(SIMIX_vm_get_pm(ind_vm) == ind_pm);
183 /* jump to vm_ws_set_vm_affinity(). */
184 surf_vm_set_affinity(ind_vm, ind_pm, mask);
189 * \brief Function to suspend a SIMIX VM host. This function stops the execution of the
190 * VM. All the processes on this VM will pause. The state of the VM is
191 * preserved on memory. We can later resume it again.
193 * \param host the vm host to suspend (a sg_host_t)
195 void SIMIX_vm_suspend(sg_host_t ind_vm, smx_process_t issuer)
197 const char *name = SIMIX_host_get_name(ind_vm);
199 if (SIMIX_vm_get_state(ind_vm) != SURF_VM_STATE_RUNNING)
200 THROWF(vm_error, 0, "VM(%s) is not running", name);
202 XBT_DEBUG("suspend VM(%s), where %d processes exist", name, xbt_swag_size(sg_host_simix(ind_vm)->process_list));
204 /* jump to vm_ws_suspend. The state will be set. */
205 surf_vm_suspend(ind_vm);
207 smx_process_t smx_process, smx_process_safe;
208 xbt_swag_foreach_safe(smx_process, smx_process_safe, sg_host_simix(ind_vm)->process_list) {
209 XBT_DEBUG("suspend %s", smx_process->name);
210 SIMIX_process_suspend(smx_process, issuer);
213 XBT_DEBUG("suspend all processes on the VM done done");
216 void simcall_HANDLER_vm_suspend(smx_simcall_t simcall, sg_host_t ind_vm)
218 if (simcall->issuer->host == ind_vm) {
219 XBT_ERROR("cannot suspend the VM where I run");
223 SIMIX_vm_suspend(ind_vm, simcall->issuer);
225 XBT_DEBUG("simcall_HANDLER_vm_suspend done");
230 * \brief Function to resume a SIMIX VM host. This function restart the execution of the
231 * VM. All the processes on this VM will run again.
233 * \param host the vm host to resume (a sg_host_t)
235 void SIMIX_vm_resume(sg_host_t ind_vm, smx_process_t issuer)
237 const char *name = SIMIX_host_get_name(ind_vm);
239 if (SIMIX_vm_get_state(ind_vm) != SURF_VM_STATE_SUSPENDED)
240 THROWF(vm_error, 0, "VM(%s) was not suspended", name);
242 XBT_DEBUG("resume VM(%s), where %d processes exist", name, xbt_swag_size(sg_host_simix(ind_vm)->process_list));
244 /* jump to vm_ws_resume() */
245 surf_vm_resume(ind_vm);
247 smx_process_t smx_process, smx_process_safe;
248 xbt_swag_foreach_safe(smx_process, smx_process_safe, sg_host_simix(ind_vm)->process_list) {
249 XBT_DEBUG("resume %s", smx_process->name);
250 SIMIX_process_resume(smx_process, issuer);
254 void simcall_HANDLER_vm_resume(smx_simcall_t simcall, sg_host_t ind_vm)
256 SIMIX_vm_resume(ind_vm, simcall->issuer);
261 * \brief Function to save a SIMIX VM host.
262 * This function is the same as vm_suspend, but the state of the VM is saved to the disk, and not preserved on memory.
263 * We can later restore it again.
265 * \param host the vm host to save (a sg_host_t)
267 void SIMIX_vm_save(sg_host_t ind_vm, smx_process_t issuer)
269 const char *name = SIMIX_host_get_name(ind_vm);
271 if (SIMIX_vm_get_state(ind_vm) != SURF_VM_STATE_RUNNING)
272 THROWF(vm_error, 0, "VM(%s) is not running", name);
275 XBT_DEBUG("save VM(%s), where %d processes exist", name, xbt_swag_size(sg_host_simix(ind_vm)->process_list));
277 /* jump to vm_ws_save() */
278 surf_vm_save(ind_vm);
280 smx_process_t smx_process, smx_process_safe;
281 xbt_swag_foreach_safe(smx_process, smx_process_safe, sg_host_simix(ind_vm)->process_list) {
282 XBT_DEBUG("suspend %s", smx_process->name);
283 SIMIX_process_suspend(smx_process, issuer);
287 void simcall_HANDLER_vm_save(smx_simcall_t simcall, sg_host_t ind_vm)
289 SIMIX_vm_save(ind_vm, simcall->issuer);
294 * \brief Function to restore a SIMIX VM host. This function restart the execution of the
295 * VM. All the processes on this VM will run again.
297 * \param host the vm host to restore (a sg_host_t)
299 void SIMIX_vm_restore(sg_host_t ind_vm, smx_process_t issuer)
301 const char *name = SIMIX_host_get_name(ind_vm);
303 if (SIMIX_vm_get_state(ind_vm) != SURF_VM_STATE_SAVED)
304 THROWF(vm_error, 0, "VM(%s) was not saved", name);
306 XBT_DEBUG("restore VM(%s), where %d processes exist", name, xbt_swag_size(sg_host_simix(ind_vm)->process_list));
308 /* jump to vm_ws_restore() */
309 surf_vm_resume(ind_vm);
311 smx_process_t smx_process, smx_process_safe;
312 xbt_swag_foreach_safe(smx_process, smx_process_safe, sg_host_simix(ind_vm)->process_list) {
313 XBT_DEBUG("resume %s", smx_process->name);
314 SIMIX_process_resume(smx_process, issuer);
318 void simcall_HANDLER_vm_restore(smx_simcall_t simcall, sg_host_t ind_vm)
320 SIMIX_vm_restore(ind_vm, simcall->issuer);
325 * \brief Function to shutdown a SIMIX VM host. This function powers off the
326 * VM. All the processes on this VM will be killed. But, the state of the VM is
327 * preserved on memory. We can later start it again.
329 * \param host the vm host to shutdown (a sg_host_t)
331 void SIMIX_vm_shutdown(sg_host_t ind_vm, smx_process_t issuer)
333 const char *name = SIMIX_host_get_name(ind_vm);
335 if (SIMIX_vm_get_state(ind_vm) != SURF_VM_STATE_RUNNING)
336 THROWF(vm_error, 0, "VM(%s) is not running", name);
338 XBT_DEBUG("shutdown %s", name);
339 XBT_DEBUG("%d processes in the VM", xbt_swag_size(sg_host_simix(ind_vm)->process_list));
341 smx_process_t smx_process, smx_process_safe;
342 xbt_swag_foreach_safe(smx_process, smx_process_safe, sg_host_simix(ind_vm)->process_list) {
343 XBT_DEBUG("kill %s", smx_process->name);
344 SIMIX_process_kill(smx_process, issuer);
347 /* FIXME: we may have to do something at the surf layer, e.g., vcpu action */
348 static_cast<simgrid::surf::VirtualMachine*>(surf_host_resource_priv(ind_vm))->setState(SURF_VM_STATE_CREATED);
351 void simcall_HANDLER_vm_shutdown(smx_simcall_t simcall, sg_host_t ind_vm)
353 SIMIX_vm_shutdown(ind_vm, simcall->issuer);
358 * \brief Function to destroy a SIMIX VM host.
360 * \param host the vm host to destroy (a sg_host_t)
362 void SIMIX_vm_destroy(sg_host_t ind_vm)
364 /* this code basically performs a similar thing like SIMIX_host_destroy() */
366 xbt_assert((ind_vm != NULL), "Invalid parameters");
367 const char *hostname = SIMIX_host_get_name(ind_vm);
369 XBT_DEBUG("destroy %s", hostname);
371 /* this will call the registered callback function, i.e., SIMIX_host_destroy(). */
372 sg_host_simix_destroy(ind_vm);
374 /* jump to vm_ws_destroy(). The surf level resource will be freed. */
375 surf_vm_destroy(ind_vm);