X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/4f4cb779caf18adeed31e284cfc8ac45198b816a..220a0c6c5a2edccc979b3c7f8ebc1409ff77ae0f:/src/simix/smx_vm.c

diff --git a/src/simix/smx_vm.c b/src/simix/smx_vm.c
index a954b4aff5..ce340c2082 100644
--- a/src/simix/smx_vm.c
+++ b/src/simix/smx_vm.c
@@ -22,64 +22,113 @@ XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_vm, simix, "Logging specific to SIMIX (vms
  */
 smx_host_t SIMIX_vm_create(const char *name, smx_host_t ind_phys_host)
 {
+  /* Create surf associated resource */
+  surf_vm_workstation_model->extension.vm_workstation.create(name, 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  ?
+  smx_host_t smx_host = SIMIX_host_create(name, ind_phys_host, NULL);
 
-  /* Host structure */
-  smx_host->data = NULL;
-  smx_host->process_list =
-      xbt_swag_new(xbt_swag_offset(proc, host_proc_hookup));
+  /* 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. */
 
-  /* Update global variables */
-  xbt_lib_set(host_lib,name,SIMIX_HOST_LEVEL,smx_host);
+  return 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 SIMIX_pre_vm_create(smx_simcall_t simcall, const char *name, smx_host_t ind_phys_host)
+{
+  return SIMIX_vm_create(name, ind_phys_host);
 }
 
 
-smx_host_t SIMIX_pre_vm_create(smx_simcall_t simcall, const char *name, smx_host_t ind_phys_host){
-   return SIMIX_vm_create(name, ind_phys_host);
-}
+/* works for VMs and PMs */
+static long host_get_ramsize(smx_host_t vm, int *overcommit)
+{
+  s_ws_params_t params;
+  surf_workstation_model->extension.workstation.get_params(vm, &params);
+
+  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.
+static int __can_be_started(smx_host_t vm)
+{
+  smx_host_t pm = surf_vm_workstation_model->extension.vm_workstation.get_pm(vm);
+
+  int pm_overcommit = 0;
+  long pm_ramsize = host_get_ramsize(pm, &pm_overcommit);
+  long vm_ramsize = host_get_ramsize(vm, NULL);
+
+  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
+void SIMIX_vm_start(smx_host_t ind_vm)
+{
   if (__can_be_started(ind_vm))
-	  SIMIX_vm_set_state(ind_vm, msg_vm_state_running);
+    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));
+    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);
+
+
+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){
-	surf_vm_workstation_model->extension.vm_workstation.set_state(ind_vm, state);
+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_pre_vm_set_state(smx_host_t ind_vm, int state){
-	SIMIX_vm_set_state(ind_vm, state);
+
+void SIMIX_pre_vm_set_state(smx_simcall_t simcall, smx_host_t ind_vm, int state)
+{
+  SIMIX_vm_set_state(ind_vm, state);
 }
 
-int SIMIX_vm_get_state(smx_host_t ind_vm){
- return surf_vm_workstation_model->extension.vm_workstation.get_state(ind_vm);
+int SIMIX_vm_get_state(smx_host_t ind_vm)
+{
+  return surf_vm_workstation_model->extension.vm_workstation.get_state(ind_vm);
 }
-int SIMIX_pre_vm_get_state(smx_host_t ind_vm){
-	return SIMIX_vm_get_state(ind_vm);
+
+int SIMIX_pre_vm_get_state(smx_simcall_t simcall, smx_host_t ind_vm)
+{
+  return SIMIX_vm_get_state(ind_vm);
 }
 
 
@@ -90,19 +139,18 @@ int SIMIX_pre_vm_get_state(smx_host_t ind_vm){
  */
 void SIMIX_vm_migrate(smx_host_t ind_vm, smx_host_t ind_dst_pm)
 {
-  /* TODO: check state */
-
-  /* TODO: Using the variable of the MSG layer is not clean. */
-  SIMIX_vm_set_state(ind_vm, msg_vm_state_migrating);
+  /* 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);
-
-  SIMIX_vm_set_state(ind_vm, msg_vm_state_running);
 }
 
-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);
+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);
 }
 
 
@@ -111,14 +159,15 @@ void SIMIX_pre_vm_migrate(smx_simcall_t simcall, smx_host_t ind_vm, smx_host_t i
  *
  * \param host the vm host to get_phys_host (a smx_host_t)
  */
-const char *SIMIX_vm_get_phys_host(smx_host_t ind_vm)
+void *SIMIX_vm_get_pm(smx_host_t ind_vm)
 {
-  /* jump to vm_ws_get_phys_host(). this will return the vm name. */
-  return surf_vm_workstation_model->extension.vm_workstation.get_phys_host(ind_vm);
+  /* jump to vm_ws_get_pm(). this will return the vm name. */
+  return surf_vm_workstation_model->extension.vm_workstation.get_pm(ind_vm);
 }
 
-const char *SIMIX_pre_vm_get_phys_host(smx_simcall_t simcall, smx_host_t ind_vm){
-  return SIMIX_vm_get_phys_host(ind_vm);
+void *SIMIX_pre_vm_get_pm(smx_simcall_t simcall, smx_host_t ind_vm)
+{
+  return SIMIX_vm_get_pm(ind_vm);
 }
 
 
@@ -129,25 +178,40 @@ const char *SIMIX_pre_vm_get_phys_host(smx_simcall_t simcall, smx_host_t ind_vm)
  *
  * \param host the vm host to suspend (a smx_host_t)
  */
-void SIMIX_vm_suspend(smx_host_t ind_vm)
+void SIMIX_vm_suspend(smx_host_t ind_vm, smx_process_t issuer)
 {
-  /* TODO: check state */
+  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);
+
+  XBT_DEBUG("suspend VM(%s), where %d processes exist", name, xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
 
-  XBT_DEBUG("%lu processes in the VM", xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
+  /* jump to vm_ws_suspend. The state will be set. */
+  surf_vm_workstation_model->extension.vm_workstation.suspend(ind_vm);
 
   smx_process_t smx_process, smx_process_safe;
   xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
-         XBT_DEBUG("suspend %s", SIMIX_host_get_name(ind_vm));
-	 /* FIXME: calling a simcall from the SIMIX layer is strange. */
-         simcall_process_suspend(smx_process);
+    XBT_DEBUG("suspend %s", smx_process->name);
+    SIMIX_process_suspend(smx_process, issuer);
   }
 
-  /* TODO: Using the variable of the MSG layer is not clean. */
-  SIMIX_vm_set_state(ind_vm, msg_vm_state_suspended);
+  XBT_DEBUG("suspend all processes on the VM done done");
 }
 
-void SIMIX_pre_vm_suspend(smx_simcall_t simcall, smx_host_t ind_vm){
-   SIMIX_vm_suspend(ind_vm);
+void SIMIX_pre_vm_suspend(smx_simcall_t simcall, smx_host_t ind_vm)
+{
+  if (simcall->issuer->smx_host == ind_vm) {
+    XBT_ERROR("cannot suspend the VM where I run");
+    DIE_IMPOSSIBLE;
+  }
+
+  SIMIX_vm_suspend(ind_vm, simcall->issuer);
+
+  /* without this, simcall_vm_suspend() does not return to the userland. why? */
+  SIMIX_simcall_answer(simcall);
+
+  XBT_DEBUG("SIMIX_pre_vm_suspend done");
 }
 
 
@@ -157,25 +221,29 @@ void SIMIX_pre_vm_suspend(smx_simcall_t simcall, smx_host_t ind_vm){
  *
  * \param host the vm host to resume (a smx_host_t)
  */
-void SIMIX_vm_resume(smx_host_t ind_vm)
+void SIMIX_vm_resume(smx_host_t ind_vm, smx_process_t issuer)
 {
-  /* TODO: check state */
+  const char *name = SIMIX_host_get_name(ind_vm);
+
+  if (SIMIX_vm_get_state(ind_vm) != SURF_VM_STATE_SUSPENDED)
+    THROWF(vm_error, 0, "VM(%s) was not suspended", name);
+
+  XBT_DEBUG("resume VM(%s), where %d processes exist", name, xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
 
-  XBT_DEBUG("%lu processes in the VM", xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
+  /* jump to vm_ws_resume() */
+  surf_vm_workstation_model->extension.vm_workstation.resume(ind_vm);
 
   smx_process_t smx_process, smx_process_safe;
   xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
-         XBT_DEBUG("resume %s", SIMIX_host_get_name(ind_vm));
-	 /* FIXME: calling a simcall from the SIMIX layer is strange. */
-         simcall_process_resume(smx_process);
+    XBT_DEBUG("resume %s", smx_process->name);
+    SIMIX_process_resume(smx_process, issuer);
   }
-
-  /* TODO: Using the variable of the MSG layer is not clean. */
-  SIMIX_vm_set_state(ind_vm, msg_vm_state_running);
 }
 
-void SIMIX_pre_vm_resume(smx_simcall_t simcall, smx_host_t ind_vm){
-   SIMIX_vm_resume(ind_vm);
+void SIMIX_pre_vm_resume(smx_simcall_t simcall, smx_host_t ind_vm)
+{
+  SIMIX_vm_resume(ind_vm, simcall->issuer);
+  SIMIX_simcall_answer(simcall);
 }
 
 
@@ -186,27 +254,32 @@ void SIMIX_pre_vm_resume(smx_simcall_t simcall, smx_host_t ind_vm){
  *
  * \param host the vm host to save (a smx_host_t)
  */
-void SIMIX_vm_save(smx_host_t ind_vm)
+void SIMIX_vm_save(smx_host_t ind_vm, smx_process_t issuer)
 {
-  /* TODO: check state */
+  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);
+
 
-  XBT_DEBUG("%lu processes in the VM", xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
+  XBT_DEBUG("save VM(%s), where %d processes exist", name, xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
 
-  /* TODO: do something at the surf level */
+  /* jump to vm_ws_save() */
+  surf_vm_workstation_model->extension.vm_workstation.save(ind_vm);
 
   smx_process_t smx_process, smx_process_safe;
   xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
-         XBT_DEBUG("save %s", SIMIX_host_get_name(ind_vm));
-	 /* FIXME: calling a simcall from the SIMIX layer is strange. */
-         simcall_process_save(smx_process);
+    XBT_DEBUG("suspend %s", smx_process->name);
+    SIMIX_process_suspend(smx_process, issuer);
   }
-
-  /* TODO: Using the variable of the MSG layer is not clean. */
-  SIMIX_vm_set_state(ind_vm, msg_vm_state_saved);
 }
 
-void SIMIX_pre_vm_save(smx_simcall_t simcall, smx_host_t ind_vm){
-   SIMIX_vm_save(ind_vm);
+void SIMIX_pre_vm_save(smx_simcall_t simcall, smx_host_t ind_vm)
+{
+  SIMIX_vm_save(ind_vm, simcall->issuer);
+
+  /* without this, simcall_vm_suspend() does not return to the userland. why? */
+  SIMIX_simcall_answer(simcall);
 }
 
 
@@ -216,27 +289,29 @@ void SIMIX_pre_vm_save(smx_simcall_t simcall, smx_host_t ind_vm){
  *
  * \param host the vm host to restore (a smx_host_t)
  */
-void SIMIX_vm_restore(smx_host_t ind_vm)
+void SIMIX_vm_restore(smx_host_t ind_vm, smx_process_t issuer)
 {
-  /* TODO: check state */
+  const char *name = SIMIX_host_get_name(ind_vm);
+
+  if (SIMIX_vm_get_state(ind_vm) != SURF_VM_STATE_SAVED)
+    THROWF(vm_error, 0, "VM(%s) was not saved", name);
 
-  XBT_DEBUG("%lu processes in the VM", xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
+  XBT_DEBUG("restore VM(%s), where %d processes exist", name, xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
 
-  /* TODO: do something at the surf level */
+  /* jump to vm_ws_restore() */
+  surf_vm_workstation_model->extension.vm_workstation.resume(ind_vm);
 
   smx_process_t smx_process, smx_process_safe;
   xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
-         XBT_DEBUG("restore %s", SIMIX_host_get_name(ind_vm));
-	 /* FIXME: calling a simcall from the SIMIX layer is strange. */
-         simcall_process_restore(smx_process);
+    XBT_DEBUG("resume %s", smx_process->name);
+    SIMIX_process_resume(smx_process, issuer);
   }
-
-  /* TODO: Using the variable of the MSG layer is not clean. */
-  SIMIX_vm_set_state(ind_vm, msg_vm_state_running);
 }
 
-void SIMIX_pre_vm_restore(smx_simcall_t simcall, smx_host_t ind_vm){
-   SIMIX_vm_restore(ind_vm);
+void SIMIX_pre_vm_restore(smx_simcall_t simcall, smx_host_t ind_vm)
+{
+  SIMIX_vm_restore(ind_vm, simcall->issuer);
+  SIMIX_simcall_answer(simcall);
 }
 
 
@@ -249,23 +324,27 @@ void SIMIX_pre_vm_restore(smx_simcall_t simcall, smx_host_t ind_vm){
  */
 void SIMIX_vm_shutdown(smx_host_t ind_vm, smx_process_t issuer)
 {
-  /* TODO: check state */
+  const char *name = SIMIX_host_get_name(ind_vm);
 
-  XBT_DEBUG("%lu processes in the VM", xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
+  if (SIMIX_vm_get_state(ind_vm) != SURF_VM_STATE_RUNNING)
+    THROWF(vm_error, 0, "VM(%s) is not running", name);
+
+  XBT_DEBUG("%d processes in the VM", xbt_swag_size(SIMIX_host_priv(ind_vm)->process_list));
 
   smx_process_t smx_process, smx_process_safe;
   xbt_swag_foreach_safe(smx_process, smx_process_safe, SIMIX_host_priv(ind_vm)->process_list) {
-         XBT_DEBUG("kill %s", SIMIX_host_get_name(ind_vm));
-
-	 SIMIX_process_kill(smx_process, issuer);
+    XBT_DEBUG("shutdown %s", name);
+    SIMIX_process_kill(smx_process, issuer);
   }
 
-  /* TODO: Using the variable of the MSG layer is not clean. */
-  SIMIX_vm_set_state(ind_vm, msg_vm_state_sleeping);
+  /* FIXME: we may have to do something at the surf layer, e.g., vcpu action */
+  SIMIX_vm_set_state(ind_vm, SURF_VM_STATE_CREATED);
 }
 
-void SIMIX_pre_vm_shutdown(smx_simcall_t simcall, smx_host_t ind_vm){
-   SIMIX_vm_shutdown(ind_vm, simcall->issuer);
+void SIMIX_pre_vm_shutdown(smx_simcall_t simcall, smx_host_t ind_vm)
+{
+  SIMIX_vm_shutdown(ind_vm, simcall->issuer);
+  SIMIX_simcall_answer(simcall);
 }
 
 
@@ -281,15 +360,15 @@ void SIMIX_vm_destroy(smx_host_t ind_vm)
   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);
+  xbt_lib_unset(host_lib, hostname, SIMIX_HOST_LEVEL, 1);
 
   /* jump to vm_ws_destroy(). The surf level resource will be freed. */
   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);
 }