*/
smx_host_t SIMIX_vm_create(const char *name, smx_host_t ind_phys_host)
{
-
- smx_host_priv_t smx_host = xbt_new0(s_smx_host_priv_t, 1);
- s_smx_process_t proc;
-
- // TODO check why we do not have any VM here and why we have the host_proc_hookup ?
-
- /* Host structure */
- smx_host->data = NULL;
- smx_host->process_list =
- xbt_swag_new(xbt_swag_offset(proc, host_proc_hookup));
-
- /* Update global variables */
- xbt_lib_set(host_lib,name,SIMIX_HOST_LEVEL,smx_host);
-
/* Create surf associated resource */
- // TODO change phys_host into the right workstation surf model
surf_vm_workstation_model->extension.vm_workstation.create(name, ind_phys_host);
- return xbt_lib_get_elm_or_null(host_lib, name);
+ smx_host_t smx_host = SIMIX_host_create(name, ind_phys_host, NULL);
+
+ /* We will be able to register the VM to its physical host, so that we can promptly
+ * retrieve the list VMs on the physical host. */
+
+ return smx_host;
}
}
-static int get_host_property_as_integer(smx_host_t host, const char *name)
+/* works for VMs and PMs */
+static long host_get_ramsize(smx_host_t vm, int *overcommit)
{
- xbt_dict_t dict = SIMIX_host_get_properties(host);
-
- char *value = xbt_dict_get_or_null(dict, name);
- return atoi(value);
-}
+ s_ws_params_t params;
+ surf_workstation_model->extension.workstation.get_params(vm, ¶ms);
+ if (overcommit)
+ *overcommit = params.overcommit;
+ return params.ramsize;
+}
/* **** start a VM **** */
static int __can_be_started(smx_host_t vm)
{
- // TODO add checking code related to overcommitment or not.
+ smx_host_t pm = surf_vm_workstation_model->extension.vm_workstation.get_pm(vm);
-#if 0
- int overcommit = get_host_property_as_integer(vm, "OverCommit");
- int core_nb = get_host_property_as_integer(vm, "CORE_NB");
- int mem_cap = get_host_property_as_integer(vm, "MEM_CAP");
- int net_cap = get_host_property_as_integer(vm, "NET_CAP");
-#endif
+ int pm_overcommit = 0;
+ long pm_ramsize = host_get_ramsize(pm, &pm_overcommit);
+ long vm_ramsize = host_get_ramsize(vm, NULL);
- /* we need to get other VM objects on this physical host. */
+ if (!pm_ramsize) {
+ /* We assume users do not want to care about ramsize. */
+ return 1;
+ }
+
+ if (pm_overcommit) {
+ XBT_INFO("%s allows memory overcommit.", pm->key);
+ return 1;
+ }
+ long total_ramsize_of_vms = 0;
+ xbt_dynar_t dyn_vms = surf_workstation_model->extension.workstation.get_vms(pm);
+ {
+ unsigned int cursor = 0;
+ smx_host_t another_vm;
+ xbt_dynar_foreach(dyn_vms, cursor, another_vm) {
+ long another_vm_ramsize = host_get_ramsize(vm, NULL);
+ total_ramsize_of_vms += another_vm_ramsize;
+ }
+ }
+ if (vm_ramsize > pm_ramsize - total_ramsize_of_vms) {
+ XBT_WARN("cannnot start %s@%s due to memory shortage: vm_ramsize %ld, free %ld, pm_ramsize %ld (bytes).",
+ vm->key, pm->key, vm_ramsize, pm_ramsize - total_ramsize_of_vms, pm_ramsize);
+ xbt_dynar_free(&dyn_vms);
+ return 0;
+ }
+ xbt_dynar_free(&dyn_vms);
return 1;
}
void SIMIX_vm_start(smx_host_t ind_vm)
{
- //TODO only start the VM if you can
if (__can_be_started(ind_vm))
SIMIX_vm_set_state(ind_vm, SURF_VM_STATE_RUNNING);
else
THROWF(vm_error, 0, "The VM %s cannot be started", SIMIX_host_get_name(ind_vm));
}
+
+
void SIMIX_pre_vm_start(smx_simcall_t simcall, smx_host_t ind_vm)
{
SIMIX_vm_start(ind_vm);
+ SIMIX_simcall_answer(simcall);
}
/* ***** set/get state of a VM ***** */
void SIMIX_vm_set_state(smx_host_t ind_vm, int state)
{
+ /* jump to vm_ws_set_state */
surf_vm_workstation_model->extension.vm_workstation.set_state(ind_vm, state);
}
*/
void SIMIX_vm_migrate(smx_host_t ind_vm, smx_host_t ind_dst_pm)
{
- const char *name = SIMIX_host_get_name(ind_vm);
-
- if (SIMIX_vm_get_state(ind_vm) != SURF_VM_STATE_RUNNING)
- THROWF(vm_error, 0, "VM(%s) is not running", name);
+ /* precopy migration makes the VM temporally paused */
+ e_surf_vm_state_t state = SIMIX_vm_get_state(ind_vm);
+ xbt_assert(state == SURF_VM_STATE_SUSPENDED);
/* jump to vm_ws_migrate(). this will update the vm location. */
surf_vm_workstation_model->extension.vm_workstation.migrate(ind_vm, ind_dst_pm);
void SIMIX_pre_vm_migrate(smx_simcall_t simcall, smx_host_t ind_vm, smx_host_t ind_dst_pm)
{
SIMIX_vm_migrate(ind_vm, ind_dst_pm);
+ SIMIX_simcall_answer(simcall);
}
xbt_assert((ind_vm != NULL), "Invalid parameters");
const char *hostname = SIMIX_host_get_name(ind_vm);
- smx_host_priv_t host_priv = SIMIX_host_priv(ind_vm);
-
/* this will call the registered callback function, i.e., SIMIX_host_destroy(). */
xbt_lib_unset(host_lib, hostname, SIMIX_HOST_LEVEL, 1);
surf_vm_workstation_model->extension.vm_workstation.destroy(ind_vm);
}
-void SIMIX_pre_vm_destroy(smx_simcall_t simcall, smx_host_t ind_vm){
- SIMIX_vm_destroy(ind_vm);
+void SIMIX_pre_vm_destroy(smx_simcall_t simcall, smx_host_t ind_vm)
+{
+ SIMIX_vm_destroy(ind_vm);
+ SIMIX_simcall_answer(simcall);
}
