#include <xbt/ex.hpp>
+#include "src/instr/instr_private.h"
+#include "src/msg/msg_private.h"
#include "src/plugins/vm/VirtualMachineImpl.hpp"
#include "src/plugins/vm/VmHostExt.hpp"
-#include <simgrid/s4u/VirtualMachine.hpp>
-#include <simgrid/s4u/host.hpp>
-#include "msg_private.h"
-#include "xbt/sysdep.h"
-#include "xbt/log.h"
#include "simgrid/host.h"
+#include "simgrid/simix.hpp"
-#include "src/simix/smx_host_private.h" /* don't ask me why the VM functions are in there (FIXME:KILLME) */
+struct dirty_page {
+ double prev_clock;
+ double prev_remaining;
+ msg_task_t task;
+};
+typedef struct dirty_page s_dirty_page;
+typedef struct dirty_page* dirty_page_t;
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_vm, msg, "Cloud-oriented parts of the MSG API");
-
/* **** ******** GENERAL ********* **** */
/** \ingroup m_vm_management
/** \ingroup m_vm_management
* \brief Get the parameters of a given host
*
- * \param host a host
+ * \param vm the vm you are interested into
* \param params a prameter object
*/
void MSG_vm_get_params(msg_vm_t vm, vm_params_t params)
return __MSG_vm_is_state(vm, SURF_VM_STATE_SUSPENDED);
}
-/** @brief Returns whether the given VM is being saved (FIXME: live saving or not?).
- * @ingroup msg_VMs
- */
-int MSG_vm_is_saving(msg_vm_t vm)
-{
- return __MSG_vm_is_state(vm, SURF_VM_STATE_SAVING);
-}
-
-/** @brief Returns whether the given VM has been saved, not running.
- * @ingroup msg_VMs
- */
-int MSG_vm_is_saved(msg_vm_t vm)
-{
- return __MSG_vm_is_state(vm, SURF_VM_STATE_SAVED);
-}
-
-/** @brief Returns whether the given VM is being restored, not running.
- * @ingroup msg_VMs
- */
-int MSG_vm_is_restoring(msg_vm_t vm)
-{
- return __MSG_vm_is_state(vm, SURF_VM_STATE_RESTORING);
-}
-
/* **** ******** MSG vm actions ********* **** */
/** @brief Create a new VM with specified parameters.
* @ingroup msg_VMs*
* @param pm Physical machine that will host the VM
- * @param name [TODO]
- * @param ncpus [TODO]
+ * @param name Must be unique
* @param ramsize [TODO]
- * @param net_cap Maximal bandwidth that the VM can consume (in MByte/s)
- * @param disk_path (unused) Path to the image that boots
- * @param disksize (unused) will represent the size of the VM (will be used during migrations)
* @param mig_netspeed Amount of Mbyte/s allocated to the migration (cannot be larger than net_cap). Use 0 if unsure.
* @param dp_intensity Dirty page percentage according to migNetSpeed, [0-100]. Use 0 if unsure.
*/
-msg_vm_t MSG_vm_create(msg_host_t pm, const char* name, int ncpus, int ramsize, int net_cap, char* disk_path,
- int disksize, int mig_netspeed, int dp_intensity)
+msg_vm_t MSG_vm_create(msg_host_t pm, const char* name, int ramsize, int mig_netspeed, int dp_intensity)
{
simgrid::vm::VmHostExt::ensureVmExtInstalled();
s_vm_params_t params;
memset(¶ms, 0, sizeof(params));
params.ramsize = (sg_size_t)ramsize * 1024 * 1024;
- //params.overcommit = 0;
params.devsize = 0;
params.skip_stage2 = 0;
params.max_downtime = 0.03;
params.dp_cap = params.ramsize * 0.9; // assume working set memory is 90% of ramsize
params.mig_speed = (double)mig_netspeed * 1024 * 1024; // mig_speed
- //XBT_INFO("dp rate %f migspeed : %f intensity mem : %d, updatespeed %f, hostspeed %f",params.dp_rate,
- // params.mig_speed, dp_intensity, update_speed, host_speed);
+ XBT_DEBUG("dp rate %f migspeed : %f intensity mem : %d, updatespeed %f, hostspeed %f", params.dp_rate,
+ params.mig_speed, dp_intensity, update_speed, host_speed);
static_cast<simgrid::s4u::VirtualMachine*>(vm)->setParameters(¶ms);
return vm;
void MSG_vm_destroy(msg_vm_t vm)
{
if (MSG_vm_is_migrating(vm))
- THROWF(vm_error, 0, "VM(%s) is migrating", vm->name().c_str());
+ THROWF(vm_error, 0, "Cannot destroy VM '%s', which is migrating.", vm->cname());
/* First, terminate all processes on the VM if necessary */
if (MSG_vm_is_running(vm))
});
if (TRACE_msg_vm_is_enabled()) {
- container_t container = PJ_container_get(vm->name().c_str());
+ container_t container = PJ_container_get(vm->cname());
PJ_container_remove_from_parent(container);
PJ_container_free(container);
}
/** @brief Start a vm (i.e., boot the guest operating system)
* @ingroup msg_VMs
*
- * If the VM cannot be started, an exception is generated.
+ * If the VM cannot be started (because of memory overprovisionning), an exception is generated.
*/
void MSG_vm_start(msg_vm_t vm)
{
- simcall_vm_start(vm);
+ simgrid::simix::kernelImmediate([vm]() {
+ simgrid::vm::VmHostExt::ensureVmExtInstalled();
+
+ simgrid::s4u::VirtualMachine* typedVM = static_cast<simgrid::s4u::VirtualMachine*>(vm);
+ simgrid::s4u::Host* pm = typedVM->pimpl_vm_->getPm();
+ if (pm->extension<simgrid::vm::VmHostExt>() == nullptr)
+ pm->extension_set(new simgrid::vm::VmHostExt());
+
+ long pm_ramsize = pm->extension<simgrid::vm::VmHostExt>()->ramsize;
+ int pm_overcommit = pm->extension<simgrid::vm::VmHostExt>()->overcommit;
+ long vm_ramsize = typedVM->getRamsize();
+
+ if (pm_ramsize && !pm_overcommit) { /* Only verify that we don't overcommit on need */
+ /* Retrieve the memory occupied by the VMs on that host. Yep, we have to traverse all VMs of all hosts for that */
+ long total_ramsize_of_vms = 0;
+ for (simgrid::s4u::VirtualMachine* ws_vm : simgrid::vm::VirtualMachineImpl::allVms_)
+ if (pm == ws_vm->pimpl_vm_->getPm())
+ total_ramsize_of_vms += ws_vm->pimpl_vm_->getRamsize();
+
+ 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->cname(), pm->cname(), vm_ramsize, pm_ramsize - total_ramsize_of_vms, pm_ramsize);
+ THROWF(vm_error, 0, "Memory shortage on host '%s', VM '%s' cannot be started", pm->cname(), vm->cname());
+ }
+ }
+
+ typedVM->pimpl_vm_->setState(SURF_VM_STATE_RUNNING);
+ });
if (TRACE_msg_vm_is_enabled()) {
- container_t vm_container = PJ_container_get(vm->name().c_str());
+ container_t vm_container = PJ_container_get(vm->cname());
type_t type = PJ_type_get("MSG_VM_STATE", vm_container->type);
val_t value = PJ_value_get_or_new("start", "0 0 1", type); // start is blue
new_pajePushState(MSG_get_clock(), vm_container, type, value);
}
}
-/** @brief Immediately kills all processes within the given VM. Any memory that they allocated will be leaked.
+/** @brief Immediately kills all processes within the given VM.
* @ingroup msg_VMs
*
- * FIXME: No extra delay occurs. If you want to simulate this too, you want to use a #MSG_process_sleep() or something.
- * I'm not quite sure.
+ * Any memory that they allocated will be leaked, unless you used #MSG_process_on_exit().
+ *
+ * No extra delay occurs. If you want to simulate this too, you want to use a #MSG_process_sleep().
*/
void MSG_vm_shutdown(msg_vm_t vm)
{
- simcall_vm_shutdown(vm);
- MSG_process_sleep(0.); // Make sure that the processes in the VM are killed in this scheduling round before processing
- // (eg with the VM destroy)
-}
-
-/* We have two mailboxes. mbox is used to transfer migration data between source and destination PMs. mbox_ctl is used
- * to detect the completion of a migration. The names of these mailboxes must not conflict with others. */
-static inline char *get_mig_mbox_src_dst(msg_vm_t vm, msg_host_t src_pm, msg_host_t dst_pm)
-{
- return bprintf("__mbox_mig_src_dst:%s(%s-%s)", vm->cname(), src_pm->cname(), dst_pm->cname());
-}
+ smx_actor_t issuer=SIMIX_process_self();
+ simgrid::simix::kernelImmediate([vm,issuer]() {
+ static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->shutdown(issuer);
+ });
-static inline char *get_mig_mbox_ctl(msg_vm_t vm, msg_host_t src_pm, msg_host_t dst_pm)
-{
- return bprintf("__mbox_mig_ctl:%s(%s-%s)", vm->cname(), src_pm->cname(), dst_pm->cname());
+ // Make sure that the processes in the VM are killed in this scheduling round before processing
+ // (eg with the VM destroy)
+ MSG_process_sleep(0.);
}
static inline char *get_mig_process_tx_name(msg_vm_t vm, msg_host_t src_pm, msg_host_t dst_pm)
simgrid::simix::kernelImmediate([vm, src_pm, dst_pm]() {
/* Update the vm location */
/* precopy migration makes the VM temporally paused */
- xbt_assert(static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->getState() == SURF_VM_STATE_SUSPENDED);
-
- /* jump to vm_ws_xigrate(). this will update the vm location. */
- static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->migrate(dst_pm);
+ xbt_assert(vm->pimpl_vm_->getState() == SURF_VM_STATE_SUSPENDED);
- /* Resume the VM */
- SIMIX_vm_resume(vm);
+ /* Update the vm location and resume it */
+ vm->pimpl_vm_->setPm(dst_pm);
+ vm->pimpl_vm_->resume();
});
{
// Now the VM is running on the new host (the migration is completed) (even if the SRC crash)
vm->pimpl_vm_->isMigrating = false;
- XBT_DEBUG("VM(%s) moved from PM(%s) to PM(%s)", sg_host_get_name(ms->vm), sg_host_get_name(ms->src_pm),
- sg_host_get_name(ms->dst_pm));
+ XBT_DEBUG("VM(%s) moved from PM(%s) to PM(%s)", ms->vm->cname(), ms->src_pm->cname(), ms->dst_pm->cname());
if (TRACE_msg_vm_is_enabled()) {
static long long int counter = 0;
snprintf(key, INSTR_DEFAULT_STR_SIZE, "%lld", counter++);
// start link
- container_t msg = PJ_container_get(vm->name().c_str());
+ container_t msg = PJ_container_get(vm->cname());
type_t type = PJ_type_get("MSG_VM_LINK", PJ_type_get_root());
new_pajeStartLink(MSG_get_clock(), PJ_container_get_root(), type, msg, "M", key);
// destroy existing container of this vm
- container_t existing_container = PJ_container_get(vm->name().c_str());
+ container_t existing_container = PJ_container_get(vm->cname());
PJ_container_remove_from_parent(existing_container);
PJ_container_free(existing_container);
// create new container on the new_host location
- PJ_container_new(vm->name().c_str(), INSTR_MSG_VM, PJ_container_get(sg_host_get_name(ms->dst_pm)));
+ PJ_container_new(vm->cname(), INSTR_MSG_VM, PJ_container_get(ms->dst_pm->cname()));
// end link
- msg = PJ_container_get(vm->name().c_str());
+ msg = PJ_container_get(vm->cname());
type = PJ_type_get("MSG_VM_LINK", PJ_type_get_root());
new_pajeEndLink(MSG_get_clock(), PJ_container_get_root(), type, msg, "M", key);
}
xbt_free(task_name);
}
-
XBT_DEBUG("mig: rx_done");
return 0;
}
-static void reset_dirty_pages(msg_vm_t vm)
+static void start_dirty_page_tracking(msg_vm_t vm)
{
- simgrid::surf::VirtualMachineImpl* pimpl = static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_;
+ simgrid::vm::VirtualMachineImpl* pimpl = static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_;
+
+ pimpl->dp_enabled = 1;
+ if (!pimpl->dp_objs)
+ return;
char *key = nullptr;
xbt_dict_cursor_t cursor = nullptr;
dirty_page_t dp = nullptr;
- if (!pimpl->dp_objs)
- return;
xbt_dict_foreach (pimpl->dp_objs, cursor, key, dp) {
double remaining = MSG_task_get_flops_amount(dp->task);
dp->prev_clock = MSG_get_clock();
}
}
-static void start_dirty_page_tracking(msg_vm_t vm)
-{
- static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->dp_enabled = 1;
-
- reset_dirty_pages(vm);
-}
-
static void stop_dirty_page_tracking(msg_vm_t vm)
{
static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->dp_enabled = 0;
double computed = dp->prev_remaining - remaining;
double duration = clock - dp->prev_clock;
- XBT_DEBUG("%s@%s: computed %f ops (remaining %f -> %f) in %f secs (%f -> %f)",
- key, sg_host_get_name(vm), computed, dp->prev_remaining, remaining, duration, dp->prev_clock, clock);
+ XBT_DEBUG("%s@%s: computed %f ops (remaining %f -> %f) in %f secs (%f -> %f)", key, vm->cname(), computed,
+ dp->prev_remaining, remaining, duration, dp->prev_clock, clock);
return computed;
}
static double lookup_computed_flop_counts(msg_vm_t vm, int stage_for_fancy_debug, int stage2_round_for_fancy_debug)
{
- simgrid::surf::VirtualMachineImpl* pimpl = static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_;
+ simgrid::vm::VirtualMachineImpl* pimpl = static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_;
double total = 0;
char *key = nullptr;
simgrid::s4u::VirtualMachine* vm = dynamic_cast<simgrid::s4u::VirtualMachine*>(host);
if (vm == nullptr)
return;
- simgrid::surf::VirtualMachineImpl* pimpl = static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_;
+ simgrid::vm::VirtualMachineImpl* pimpl = static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_;
double remaining = MSG_task_get_flops_amount(task);
char *key = bprintf("%s-%p", task->name, task);
dp->prev_remaining = remaining;
}
if (!pimpl->dp_objs)
- pimpl->dp_objs = xbt_dict_new();
+ pimpl->dp_objs = xbt_dict_new_homogeneous(nullptr);
xbt_assert(xbt_dict_get_or_null(pimpl->dp_objs, key) == nullptr);
xbt_dict_set(pimpl->dp_objs, key, dp, nullptr);
- XBT_DEBUG("add %s on %s (remaining %f, dp_enabled %d)", key, sg_host_get_name(host), remaining, pimpl->dp_enabled);
+ XBT_DEBUG("add %s on %s (remaining %f, dp_enabled %d)", key, host->cname(), remaining, pimpl->dp_enabled);
xbt_free(key);
}
simgrid::s4u::VirtualMachine* vm = dynamic_cast<simgrid::s4u::VirtualMachine*>(host);
if (vm == nullptr)
return;
- simgrid::surf::VirtualMachineImpl* pimpl = static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_;
+ simgrid::vm::VirtualMachineImpl* pimpl = static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_;
char *key = bprintf("%s-%p", task->name, task);
dirty_page_t dp = (dirty_page_t)(pimpl->dp_objs ? xbt_dict_get_or_null(pimpl->dp_objs, key) : NULL);
xbt_dict_remove(pimpl->dp_objs, key);
xbt_free(dp);
- XBT_DEBUG("del %s on %s", key, sg_host_get_name(host));
+ XBT_DEBUG("del %s on %s", key, host->cname());
xbt_free(key);
}
if(ret == MSG_HOST_FAILURE){
//XBT_DEBUG("SRC host failed during migration of %s (stage %d)", sg_host_name(vm), stage);
MSG_task_destroy(task);
- THROWF(host_error, 0, "SRC host failed during migration of %s (stage %d)", sg_host_get_name(vm), stage);
+ THROWF(host_error, 0, "SRC host failed during migration of %s (stage %d)", vm->cname(), stage);
}else if(ret == MSG_TRANSFER_FAILURE){
//XBT_DEBUG("DST host failed during migration of %s (stage %d)", sg_host_name(vm), stage);
MSG_task_destroy(task);
- THROWF(host_error, 0, "DST host failed during migration of %s (stage %d)", sg_host_get_name(vm), stage);
+ THROWF(host_error, 0, "DST host failed during migration of %s (stage %d)", vm->cname(), stage);
}
double clock_end = MSG_get_clock();
return (sg_size_t) updated_size;
}
-static double send_stage1(struct migration_session* ms, sg_size_t ramsize, double mig_speed, double dp_rate,
- double dp_cap)
-{
- // const long chunksize = (sg_size_t)1024 * 1024 * 100;
- const sg_size_t chunksize = (sg_size_t)1024 * 1024 * 100000;
- sg_size_t remaining = ramsize;
- double computed_total = 0;
-
- while (remaining > 0) {
- sg_size_t datasize = chunksize;
- if (remaining < chunksize)
- datasize = remaining;
-
- remaining -= datasize;
- send_migration_data(ms->vm, ms->src_pm, ms->dst_pm, datasize, ms->mbox, 1, 0, mig_speed, -1);
- double computed = lookup_computed_flop_counts(ms->vm, 1, 0);
- computed_total += computed;
- }
-
- return computed_total;
-}
-
-static double get_threshold_value(double bandwidth, double max_downtime)
-{
- return max_downtime * bandwidth;
-}
-
static int migration_tx_fun(int argc, char *argv[])
{
XBT_DEBUG("mig: tx_start");
const double mig_speed = params.mig_speed;
double max_downtime = params.max_downtime;
- /* hard code it temporally. Fix Me */
-#define MIGRATION_TIMEOUT_DO_NOT_HARDCODE_ME 10000000.0
- double mig_timeout = MIGRATION_TIMEOUT_DO_NOT_HARDCODE_ME;
+ double mig_timeout = 10000000.0;
double remaining_size = (double) (ramsize + devsize);
double threshold = 0.0;
double clock_post_send = MSG_get_clock();
mig_timeout -= (clock_post_send - clock_prev_send);
if (mig_timeout < 0) {
- XBT_VERB("The duration of stage 1 exceeds the timeout value (%lf > %lf), skip stage 2",
- (clock_post_send - clock_prev_send), MIGRATION_TIMEOUT_DO_NOT_HARDCODE_ME);
+ XBT_VERB("The duration of stage 1 exceeds the timeout value, skip stage 2");
skip_stage2 = 1;
}
/* estimate bandwidth */
double bandwidth = ramsize / (clock_post_send - clock_prev_send);
- threshold = get_threshold_value(bandwidth, max_downtime);
+ threshold = bandwidth * max_downtime;
XBT_DEBUG("actual bandwidth %f (MB/s), threshold %f", bandwidth / 1024 / 1024, threshold);
}
if (sent == updated_size) {
/* timeout did not happen */
double bandwidth = updated_size / (clock_post_send - clock_prev_send);
- threshold = get_threshold_value(bandwidth, max_downtime);
+ threshold = bandwidth * max_downtime;
XBT_DEBUG("actual bandwidth %f, threshold %f", bandwidth / 1024 / 1024, threshold);
remaining_size -= sent;
stage2_round += 1;
/* Stage3: stop the VM and copy the rest of states. */
XBT_DEBUG("mig-stage3: remaining_size %f", remaining_size);
- simcall_vm_suspend(ms->vm);
+ simgrid::vm::VirtualMachineImpl* pimpl = static_cast<simgrid::s4u::VirtualMachine*>(ms->vm)->pimpl_vm_;
+ pimpl->setState(SURF_VM_STATE_RUNNING); // FIXME: this bypass of the checks in suspend() is not nice
+ pimpl->isMigrating = false; // FIXME: this bypass of the checks in suspend() is not nice
+ pimpl->suspend(SIMIX_process_self());
stop_dirty_page_tracking(ms->vm);
try {
catch(xbt_ex& e) {
//hostfailure (if you want to know whether this is the SRC or the DST check directly in send_migration_data code)
// Stop the dirty page tracking an return (there is no memory space to release)
- simcall_vm_resume(ms->vm);
+ static_cast<simgrid::s4u::VirtualMachine*>(ms->vm)->pimpl_vm_->resume();
return 0;
}
return 0;
}
-static int do_migration(msg_vm_t vm, msg_host_t src_pm, msg_host_t dst_pm)
+/** @brief Migrate the VM to the given host.
+ * @ingroup msg_VMs
+ */
+void MSG_vm_migrate(msg_vm_t vm, msg_host_t dst_pm)
{
+ /* some thoughts:
+ * - One approach is ...
+ * We first create a new VM (i.e., destination VM) on the destination physical host. The destination VM will
+ * receive the state of the source
+ * VM over network. We will finally destroy the source VM.
+ * - This behavior is similar to the way of migration in the real world.
+ * Even before a migration is completed, we will see a destination VM, consuming resources.
+ * - We have to relocate all processes. The existing process migration code will work for this?
+ * - The name of the VM is a somewhat unique ID in the code. It is tricky for the destination VM?
+ *
+ * - Another one is ...
+ * We update the information of the given VM to place it to the destination physical host.
+ *
+ * The second one would be easier.
+ */
+
+ simgrid::s4u::VirtualMachine* typedVm = static_cast<simgrid::s4u::VirtualMachine*>(vm);
+ simgrid::vm::VirtualMachineImpl* pimpl = typedVm->pimpl_vm_;
+ msg_host_t src_pm = pimpl->getPm();
+
+ if (src_pm->isOff())
+ THROWF(vm_error, 0, "Cannot migrate VM '%s' from host '%s', which is offline.", vm->cname(), src_pm->cname());
+ if (dst_pm->isOff())
+ THROWF(vm_error, 0, "Cannot migrate VM '%s' to host '%s', which is offline.", vm->cname(), dst_pm->cname());
+ if (!MSG_vm_is_running(vm))
+ THROWF(vm_error, 0, "Cannot migrate VM '%s' that is not running yet.", vm->cname());
+ if (typedVm->isMigrating())
+ THROWF(vm_error, 0, "Cannot migrate VM '%s' that is already migrating.", vm->cname());
+
+ pimpl->isMigrating = true;
+
struct migration_session *ms = xbt_new(struct migration_session, 1);
ms->vm = vm;
ms->src_pm = src_pm;
ms->dst_pm = dst_pm;
- ms->mbox_ctl = get_mig_mbox_ctl(vm, src_pm, dst_pm);
- ms->mbox = get_mig_mbox_src_dst(vm, src_pm, dst_pm);
+
+ /* We have two mailboxes. mbox is used to transfer migration data between source and destination PMs. mbox_ctl is used
+ * to detect the completion of a migration. The names of these mailboxes must not conflict with others. */
+ ms->mbox_ctl = bprintf("__mbox_mig_ctl:%s(%s-%s)", vm->cname(), src_pm->cname(), dst_pm->cname());
+ ms->mbox = bprintf("__mbox_mig_src_dst:%s(%s-%s)", vm->cname(), src_pm->cname(), dst_pm->cname());
char *pr_rx_name = get_mig_process_rx_name(vm, src_pm, dst_pm);
char *pr_tx_name = get_mig_process_tx_name(vm, src_pm, dst_pm);
XBT_DEBUG("wait for reception of the final ACK (i.e. migration has been correctly performed");
msg_task_t task = nullptr;
msg_error_t ret = MSG_TIMEOUT;
- while (ret == MSG_TIMEOUT && MSG_host_is_on(dst_pm)) // Wait while you receive the message o
+ while (ret == MSG_TIMEOUT && dst_pm->isOn()) // The rx will tell me when he gots the VM
ret = MSG_task_receive_with_timeout(&task, ms->mbox_ctl, 4);
+ pimpl->isMigrating = false;
+
xbt_free(ms->mbox_ctl);
xbt_free(ms->mbox);
xbt_free(ms);
- // xbt_assert(ret == MSG_OK);
if (ret == MSG_HOST_FAILURE) {
// Note that since the communication failed, the owner did not change and the task should be destroyed on the
// other side. Hence, just throw the execption
XBT_ERROR("SRC crashes, throw an exception (m-control)");
// MSG_process_kill(tx_process); // Adrien, I made a merge on Nov 28th 2014, I'm not sure whether this line is
// required or not
- return -1;
+ THROWF(host_error, 0, "Source host '%s' failed during the migration of VM '%s'.", src_pm->cname(), vm->cname());
} else if ((ret == MSG_TRANSFER_FAILURE) || (ret == MSG_TIMEOUT)) {
// MSG_TIMEOUT here means that MSG_host_is_avail() returned false.
XBT_ERROR("DST crashes, throw an exception (m-control)");
- return -2;
+ THROWF(host_error, 0, "Destination host '%s' failed during the migration of VM '%s'.", dst_pm->cname(),
+ vm->cname());
}
char* expected_task_name = get_mig_task_name(vm, src_pm, dst_pm, 4);
xbt_assert(strcmp(task->name, expected_task_name) == 0);
xbt_free(expected_task_name);
MSG_task_destroy(task);
- return 0;
-}
-
-/** @brief Migrate the VM to the given host.
- * @ingroup msg_VMs
- *
- * FIXME: No migration cost occurs. If you want to simulate this too, you want to use a MSG_task_send() before or after,
- * depending on whether you want to do cold or hot migration.
- */
-void MSG_vm_migrate(msg_vm_t vm, msg_host_t new_pm)
-{
- /* some thoughts:
- * - One approach is ...
- * We first create a new VM (i.e., destination VM) on the destination physical host. The destination VM will
- * receive the state of the source
- * VM over network. We will finally destroy the source VM.
- * - This behavior is similar to the way of migration in the real world.
- * Even before a migration is completed, we will see a destination VM, consuming resources.
- * - We have to relocate all processes. The existing process migration code will work for this?
- * - The name of the VM is a somewhat unique ID in the code. It is tricky for the destination VM?
- *
- * - Another one is ...
- * We update the information of the given VM to place it to the destination physical host.
- *
- * The second one would be easier.
- */
-
- simgrid::surf::VirtualMachineImpl* pimpl = static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_;
- msg_host_t old_pm = pimpl->getPm();
-
- if (old_pm->isOff())
- THROWF(vm_error, 0, "Cannot start a migration from host '%s', which is offline.", sg_host_get_name(old_pm));
-
- if (new_pm->isOff())
- THROWF(vm_error, 0, "Cannot start a migration to host '%s', which is offline.", sg_host_get_name(new_pm));
-
- if (!MSG_vm_is_running(vm))
- THROWF(vm_error, 0, "VM(%s) is not running", sg_host_get_name(vm));
-
- if (MSG_vm_is_migrating(vm))
- THROWF(vm_error, 0, "VM(%s) is already migrating", sg_host_get_name(vm));
-
- pimpl->isMigrating = 1;
-
- int ret = do_migration(vm, old_pm, new_pm);
- if (ret == -1) {
- pimpl->isMigrating = 0;
- THROWF(host_error, 0, "SRC host failed during migration");
- } else if (ret == -2) {
- pimpl->isMigrating = 0;
- THROWF(host_error, 0, "DST host failed during migration");
- }
}
/** @brief Immediately suspend the execution of all processes within the given VM.
*/
void MSG_vm_suspend(msg_vm_t vm)
{
- if (MSG_vm_is_migrating(vm))
- THROWF(vm_error, 0, "VM(%s) is migrating", sg_host_get_name(vm));
-
- simcall_vm_suspend(vm);
+ smx_actor_t issuer = SIMIX_process_self();
+ simgrid::simix::kernelImmediate([vm,issuer]() {
+ static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->suspend(issuer);
+ });
XBT_DEBUG("vm_suspend done");
if (TRACE_msg_vm_is_enabled()) {
- container_t vm_container = PJ_container_get(vm->name().c_str());
+ container_t vm_container = PJ_container_get(vm->cname());
type_t type = PJ_type_get("MSG_VM_STATE", vm_container->type);
val_t value = PJ_value_get_or_new("suspend", "1 0 0", type); // suspend is red
new_pajePushState(MSG_get_clock(), vm_container, type, value);
*/
void MSG_vm_resume(msg_vm_t vm)
{
- simcall_vm_resume(vm);
-
- if (TRACE_msg_vm_is_enabled()) {
- container_t vm_container = PJ_container_get(vm->name().c_str());
- type_t type = PJ_type_get("MSG_VM_STATE", vm_container->type);
- new_pajePopState(MSG_get_clock(), vm_container, type);
- }
-}
-
-
-/** @brief Immediately save the execution of all processes within the given VM.
- * @ingroup msg_VMs
- *
- * This function stops the execution of the VM. All the processes on this VM
- * will pause. The state of the VM is preserved. We can later resume it again.
- *
- * FIXME: No suspension cost occurs. If you want to simulate this too, you want to use a \ref MSG_file_write() before
- * or after, depending on the exact semantic of VM save to you.
- */
-void MSG_vm_save(msg_vm_t vm)
-{
- if (MSG_vm_is_migrating(vm))
- THROWF(vm_error, 0, "VM(%s) is migrating", sg_host_get_name(vm));
-
- simcall_vm_save(vm);
-
- if (TRACE_msg_vm_is_enabled()) {
- container_t vm_container = PJ_container_get(vm->name().c_str());
- type_t type = PJ_type_get("MSG_VM_STATE", vm_container->type);
- val_t value = PJ_value_get_or_new("save", "0 1 0", type); // save is green
- new_pajePushState(MSG_get_clock(), vm_container, type, value);
- }
-}
-
-/** @brief Restore the execution of the VM. All processes on the VM run again.
- * @ingroup msg_VMs
- *
- * FIXME: No restore cost occurs. If you want to simulate this too, you want to use a \ref MSG_file_read() before or
- * after, depending on the exact semantic of VM restore to you.
- */
-void MSG_vm_restore(msg_vm_t vm)
-{
- simcall_vm_restore(vm);
+ static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->resume();
if (TRACE_msg_vm_is_enabled()) {
- container_t vm_container = PJ_container_get(vm->name().c_str());
+ container_t vm_container = PJ_container_get(vm->cname());
type_t type = PJ_type_get("MSG_VM_STATE", vm_container->type);
new_pajePopState(MSG_get_clock(), vm_container, type);
}
*/
msg_host_t MSG_vm_get_pm(msg_vm_t vm)
{
- return static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->getPm();
+ return static_cast<simgrid::s4u::VirtualMachine*>(vm)->pm();
}
/** @brief Set a CPU bound for a given VM.
*/
void MSG_vm_set_bound(msg_vm_t vm, double bound)
{
- simcall_vm_set_bound(vm, bound);
+ simgrid::simix::kernelImmediate(
+ [vm, bound]() { static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->setBound(bound); });
}
