/** \ingroup msg_host_management
* \brief Return the content of mounted storages on an host.
* \param host a host
* \return a dict containing content (as a dict) of all storages mounted on the host
*/
xbt_dict_t MSG_host_get_storage_content(msg_host_t host)
{
xbt_assert((host != NULL), "Invalid parameters");
xbt_dict_t contents = xbt_dict_new_homogeneous(NULL);
msg_storage_t storage;
char* storage_name;
char* mount_name;
xbt_dict_cursor_t cursor = NULL;
xbt_dict_t storage_list = simcall_host_get_mounted_storage_list(host);
xbt_dict_foreach(storage_list,cursor,mount_name,storage_name){
storage = (msg_storage_t)xbt_lib_get_elm_or_null(storage_lib,storage_name);
xbt_dict_t content = simcall_storage_get_content(storage);
xbt_dict_set(contents,mount_name, content,NULL);
}
/* Creates a workstation and registers it in SD.
*/
SD_workstation_t __SD_workstation_create(void *surf_workstation,
void *data)
{
SD_workstation_priv_t workstation;
const char *name;
workstation = xbt_new(s_SD_workstation_priv_t, 1);
workstation->data = data; /* user data */
workstation->access_mode = SD_WORKSTATION_SHARED_ACCESS; /* default mode is shared */
workstation->task_fifo = NULL;
workstation->current_task = NULL;
name = surf_resource_name(surf_workstation);
xbt_lib_set(host_lib,name,SD_HOST_LEVEL,workstation);
return xbt_lib_get_elm_or_null(host_lib,name);
}
/** \ingroup msg_file_management
* \brief Write into a file (local or remote)
*
* \param size of the file to write
* \param fd is a the file descriptor
* \return the number of bytes successfully write or -1 if an error occurred
*/
sg_size_t MSG_file_write(msg_file_t fd, sg_size_t size)
{
msg_file_priv_t file_priv = MSG_file_priv(fd);
sg_size_t write_size, offset;
/* Find the host where the file is physically located (remote or local)*/
msg_storage_t storage_src =(msg_storage_t) xbt_lib_get_elm_or_null(storage_lib, file_priv->storageId);
msg_storage_priv_t storage_priv_src = MSG_storage_priv(storage_src);
msg_host_t attached_host = MSG_get_host_by_name(storage_priv_src->hostname);
if(strcmp(storage_priv_src->hostname, MSG_host_get_name(MSG_host_self()))){
/* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", storage_priv_src->hostname, size);
msg_host_t *m_host_list = NULL;
m_host_list = calloc(2, sizeof(msg_host_t));
m_host_list[0] = MSG_host_self();
m_host_list[1] = attached_host;
double flops_amount[] = { 0, 0 };
double bytes_amount[] = { 0, (double)size, 0, 0 };
msg_task_t task = MSG_parallel_task_create("file transfer for write", 2, m_host_list, flops_amount, bytes_amount, NULL);
msg_error_t transfer = MSG_parallel_task_execute(task);
MSG_task_destroy(task);
free(m_host_list);
if(transfer != MSG_OK){
if (transfer == MSG_HOST_FAILURE)
XBT_WARN("Transfer error, %s remote host just turned off!", MSG_host_get_name(attached_host));
if (transfer == MSG_TASK_CANCELED)
XBT_WARN("Transfer error, task has been canceled!");
return -1;
}
}
/* Write file on local or remote host */
offset = simcall_file_tell(file_priv->simdata->smx_file);
write_size = simcall_file_write(file_priv->simdata->smx_file, size, attached_host);
file_priv->size = offset+write_size;
return write_size;
}
/**
* \brief Returns a workstation given its name
*
* If there is no such workstation, the function returns \c NULL.
*
* \param name workstation name
* \return the workstation, or \c NULL if there is no such workstation
*/
SD_workstation_t SD_workstation_get_by_name(const char *name)
{
return xbt_lib_get_elm_or_null(host_lib, name);
}
/*
* A surf level object will be useless in the upper layer. Returing the
* dict_elm of the host.
**/
surf_resource_t VM::getPm()
{
return xbt_lib_get_elm_or_null(host_lib, p_subWs->getName());
}
/** \ingroup msg_host_management
* \brief Finds a msg_host_t using its name.
*
* This is a name directory service
* \param name the name of an host.
* \return the corresponding host
*/
msg_host_t MSG_get_host_by_name(const char *name)
{
return (msg_host_t) xbt_lib_get_elm_or_null(host_lib,name);
}
double VMHL13Model::shareResources(double now)
{
/* TODO: udpate action's cost with the total cost of processes on the VM. */
/* 0. Make sure that we already calculated the resource share at the physical
* machine layer. */
{
_XBT_GNUC_UNUSED ModelPtr ws_model = surf_host_model;
_XBT_GNUC_UNUSED ModelPtr vm_ws_model = surf_vm_model;
_XBT_GNUC_UNUSED unsigned int index_of_pm_ws_model = xbt_dynar_search(model_list_invoke, &ws_model);
_XBT_GNUC_UNUSED unsigned int index_of_vm_ws_model = xbt_dynar_search(model_list_invoke, &vm_ws_model);
xbt_assert((index_of_pm_ws_model < index_of_vm_ws_model), "Cannot assume surf_host_model comes before");
/* Another option is that we call sub_ws->share_resource() here. The
* share_resource() function has no side-effect. We can call it here to
* ensure that. */
}
/* 1. Now we know how many resource should be assigned to each virtual
* machine. We update constraints of the virtual machine layer.
*
*
* If we have two virtual machine (VM1 and VM2) on a physical machine (PM1).
* X1 + X2 = C (Equation 1)
* where
* the resource share of VM1: X1
* the resource share of VM2: X2
* the capacity of PM1: C
*
* Then, if we have two process (P1 and P2) on VM1.
* X1_1 + X1_2 = X1 (Equation 2)
* where
* the resource share of P1: X1_1
* the resource share of P2: X1_2
* the capacity of VM1: X1
*
* Equation 1 was solved in the physical machine layer.
* Equation 2 is solved in the virtual machine layer (here).
* X1 must be passed to the virtual machine laye as a constraint value.
*
**/
/* iterate for all virtual machines */
for (VMModel::vm_list_t::iterator iter =
VMModel::ws_vms.begin();
iter != VMModel::ws_vms.end(); ++iter) {
VMPtr ws_vm = &*iter;
CpuPtr cpu = ws_vm->p_cpu;
xbt_assert(cpu, "cpu-less host");
double solved_value = get_solved_value(ws_vm->p_action);
XBT_DEBUG("assign %f to vm %s @ pm %s", solved_value,
ws_vm->getName(), ws_vm->p_subWs->getName());
// TODO: check lmm_update_constraint_bound() works fine instead of the below manual substitution.
// cpu_cas01->constraint->bound = solved_value;
xbt_assert(cpu->getModel() == surf_cpu_model_vm);
lmm_system_t vcpu_system = cpu->getModel()->getMaxminSystem();
lmm_update_constraint_bound(vcpu_system, cpu->getConstraint(), virt_overhead * solved_value);
}
/* 2. Calculate resource share at the virtual machine layer. */
adjustWeightOfDummyCpuActions();
double min_by_cpu = p_cpuModel->shareResources(now);
double min_by_net = (strcmp(surf_network_model->getName(), "network NS3")) ? surf_network_model->shareResources(now) : -1;
double min_by_sto = -1;
if (p_cpuModel == surf_cpu_model_pm)
min_by_sto = surf_storage_model->shareResources(now);
XBT_DEBUG("model %p, %s min_by_cpu %f, %s min_by_net %f, %s min_by_sto %f",
this, surf_cpu_model_pm->getName(), min_by_cpu,
surf_network_model->getName(), min_by_net,
surf_storage_model->getName(), min_by_sto);
double ret = max(max(min_by_cpu, min_by_net), min_by_sto);
if (min_by_cpu >= 0.0 && min_by_cpu < ret)
ret = min_by_cpu;
if (min_by_net >= 0.0 && min_by_net < ret)
ret = min_by_net;
if (min_by_sto >= 0.0 && min_by_sto < ret)
ret = min_by_sto;
/* FIXME: 3. do we have to re-initialize our cpu_action object? */
#if 0
/* iterate for all virtual machines */
for (VMModel::vm_list_t::iterator iter =
VMModel::ws_vms.begin();
iter != VMModel::ws_vms.end(); ++iter) {
{
#if 0
VM2013Ptr ws_vm2013 = static_cast<VM2013Ptr>(&*iter);
XBT_INFO("cost %f remains %f start %f finish %f", ws_vm2013->cpu_action->cost,
ws_vm2013->cpu_action->remains,
ws_vm2013->cpu_action->start,
ws_vm2013->cpu_action->finish
);
#endif
#if 0
void *ind_sub_host = xbt_lib_get_elm_or_null(host_lib, ws_vm2013->sub_ws->generic_resource.getName);
surf_cpu_model_pm->action_unref(ws_vm2013->cpu_action);
/* FIXME: this means busy loop? */
// ws_vm2013->cpu_action = surf_cpu_model_pm->extension.cpu.execute(ind_sub_host, GUESTOS_NOISE);
ws_vm2013->cpu_action = surf_cpu_model_pm->extension.cpu.execute(ind_sub_host, 0);
#endif
}
}
#endif
return ret;
}
