#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
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;
*
* A VM is treated as a host. The name of the VM must be unique among all hosts.
*/
-msg_vm_t MSG_vm_create_core(msg_host_t ind_pm, const char *name)
+msg_vm_t MSG_vm_create_core(msg_host_t pm, const char* name)
{
- /* make sure the VM of the same name does not exit */
- {
- simgrid::s4u::Host* ind_host_tmp = sg_host_by_name(name);
- if (ind_host_tmp != nullptr && sg_host_simix(ind_host_tmp) != nullptr) {
- XBT_ERROR("host %s already exits", name);
- return nullptr;
- }
- }
-
- /* Note: ind_vm and vm_workstation point to the same elm object. */
- /* Ask the SIMIX layer to create the surf vm resource */
- sg_host_t ind_vm_workstation = simcall_vm_create(name, ind_pm);
+ xbt_assert(sg_host_by_name(name) == nullptr,
+ "Cannot create a VM named %s: this name is already used by an host or a VM", name);
- msg_vm_t ind_vm = (msg_vm_t) __MSG_host_create(ind_vm_workstation);
-
- XBT_DEBUG("A new VM (%s) has been created", name);
-
- TRACE_msg_vm_create(name, ind_pm);
-
- return ind_vm;
+ return new simgrid::s4u::VirtualMachine(name, pm);
}
/** @brief Destroy a VM. Destroy the VM object from the simulation.
void MSG_vm_destroy(msg_vm_t vm)
{
if (MSG_vm_is_migrating(vm))
- THROWF(vm_error, 0, "VM(%s) is migrating", sg_host_get_name(vm));
+ 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))
- simcall_vm_shutdown(vm);
+ MSG_vm_shutdown(vm);
- if (!MSG_vm_is_created(vm)) {
- XBT_CRITICAL("shutdown the given VM before destroying it");
- DIE_IMPOSSIBLE;
- }
+ xbt_assert(MSG_vm_is_created(vm), "shutdown the given VM before destroying it");
/* Then, destroy the VM object */
- simcall_vm_destroy(vm);
+ simgrid::simix::kernelImmediate([vm]() {
+ vm->destroy();
+ });
- TRACE_msg_vm_end(vm);
+ if (TRACE_msg_vm_is_enabled()) {
+ 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);
+ });
- TRACE_msg_vm_start(vm);
+ if (TRACE_msg_vm_is_enabled()) {
+ 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)
{
- /* msg_vm_t equals to msg_host_t */
- 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)
- // TRACE_msg_vm_(vm);
-}
-
-/* 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)
-{
- const char *vm_name = sg_host_get_name(vm);
- const char *src_pm_name = sg_host_get_name(src_pm);
- const char *dst_pm_name = sg_host_get_name(dst_pm);
-
- return bprintf("__mbox_mig_src_dst:%s(%s-%s)", vm_name, src_pm_name, dst_pm_name);
-}
-
-static inline char *get_mig_mbox_ctl(msg_vm_t vm, msg_host_t src_pm, msg_host_t dst_pm)
-{
- const char *vm_name = sg_host_get_name(vm);
- const char *src_pm_name = sg_host_get_name(src_pm);
- const char *dst_pm_name = sg_host_get_name(dst_pm);
+ smx_actor_t issuer=SIMIX_process_self();
+ simgrid::simix::kernelImmediate([vm,issuer]() {
+ static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->shutdown(issuer);
+ });
- return bprintf("__mbox_mig_ctl:%s(%s-%s)", vm_name, src_pm_name, dst_pm_name);
+ // 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)
{
- const char *vm_name = sg_host_get_name(vm);
- const char *src_pm_name = sg_host_get_name(src_pm);
- const char *dst_pm_name = sg_host_get_name(dst_pm);
-
- return bprintf("__pr_mig_tx:%s(%s-%s)", vm_name, src_pm_name, dst_pm_name);
+ return bprintf("__pr_mig_tx:%s(%s-%s)", vm->cname(), src_pm->cname(), dst_pm->cname());
}
static inline char *get_mig_process_rx_name(msg_vm_t vm, msg_host_t src_pm, msg_host_t dst_pm)
{
- const char *vm_name = sg_host_get_name(vm);
- const char *src_pm_name = sg_host_get_name(src_pm);
- const char *dst_pm_name = sg_host_get_name(dst_pm);
-
- return bprintf("__pr_mig_rx:%s(%s-%s)", vm_name, src_pm_name, dst_pm_name);
+ return bprintf("__pr_mig_rx:%s(%s-%s)", vm->cname(), src_pm->cname(), dst_pm->cname());
}
static inline char *get_mig_task_name(msg_vm_t vm, msg_host_t src_pm, msg_host_t dst_pm, int stage)
{
- const char *vm_name = sg_host_get_name(vm);
- const char *src_pm_name = sg_host_get_name(src_pm);
- const char *dst_pm_name = sg_host_get_name(dst_pm);
-
- return bprintf("__task_mig_stage%d:%s(%s-%s)", stage, vm_name, src_pm_name, dst_pm_name);
+ return bprintf("__task_mig_stage%d:%s(%s-%s)", stage, vm->cname(), src_pm->cname(), dst_pm->cname());
}
struct migration_session {
// The structure has been created in the do_migration function and should only be freed in the same place ;)
struct migration_session *ms = (migration_session *) MSG_process_get_data(MSG_process_self());
- s_vm_params_t params;
- static_cast<simgrid::s4u::VirtualMachine*>(ms->vm)->parameters(¶ms);
-
- int need_exit = 0;
+ bool received_finalize = false;
char *finalize_task_name = get_mig_task_name(ms->vm, ms->src_pm, ms->dst_pm, 3);
-
- int ret = 0;
- for (;;) {
+ while (!received_finalize) {
msg_task_t task = nullptr;
- ret = MSG_task_recv(&task, ms->mbox);
- {
- if (ret != MSG_OK) {
- // An error occurred, clean the code and return
- // The owner did not change, hence the task should be only destroyed on the other side
- xbt_free(finalize_task_name);
- return 0;
- }
+ int ret = MSG_task_recv(&task, ms->mbox);
+
+ if (ret != MSG_OK) {
+ // An error occurred, clean the code and return
+ // The owner did not change, hence the task should be only destroyed on the other side
+ xbt_free(finalize_task_name);
+ return 0;
}
if (strcmp(task->name, finalize_task_name) == 0)
- need_exit = 1;
+ received_finalize = 1;
MSG_task_destroy(task);
-
- if (need_exit)
- break;
}
+ xbt_free(finalize_task_name);
// Here Stage 1, 2 and 3 have been performed.
// Hence complete the migration
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);
+ xbt_assert(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);
-
- /* 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));
- TRACE_msg_vm_change_host(ms->vm, ms->src_pm, ms->dst_pm);
+ // 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)", ms->vm->cname(), ms->src_pm->cname(), ms->dst_pm->cname());
+
+ if (TRACE_msg_vm_is_enabled()) {
+ static long long int counter = 0;
+ char key[INSTR_DEFAULT_STR_SIZE];
+ snprintf(key, INSTR_DEFAULT_STR_SIZE, "%lld", counter++);
+
+ // start link
+ 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->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->cname(), INSTR_MSG_VM, PJ_container_get(ms->dst_pm->cname()));
+
+ // end link
+ 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);
+ }
}
// Inform the SRC that the migration has been correctly performed
{
xbt_free(task_name);
}
- xbt_free(finalize_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::surf::VirtualMachineImpl*>(vm->pimpl_);
+ 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::surf::VirtualMachineImpl*>(vm->pimpl_);
+ 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::surf::VirtualMachineImpl*>(vm->pimpl_);
+ 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);
}
-static sg_size_t send_migration_data(msg_vm_t vm, msg_host_t src_pm, msg_host_t dst_pm, sg_size_t size, char *mbox,
+static sg_size_t send_migration_data(msg_vm_t vm, msg_host_t src_pm, msg_host_t dst_pm, sg_size_t size, char* mbox,
int stage, int stage2_round, double mig_speed, double timeout)
{
sg_size_t sent = 0;
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();
double actual_speed = size / duration;
if (stage == 2)
- XBT_DEBUG("mig-stage%d.%d: sent %llu duration %f actual_speed %f (target %f)",
- stage, stage2_round, size, duration, actual_speed, mig_speed);
+ XBT_DEBUG("mig-stage%d.%d: sent %llu duration %f actual_speed %f (target %f)", stage, stage2_round, size, duration,
+ actual_speed, mig_speed);
else
- XBT_DEBUG("mig-stage%d: sent %llu duration %f actual_speed %f (target %f)",
- stage, size, duration, actual_speed, mig_speed);
+ XBT_DEBUG("mig-stage%d: sent %llu duration %f actual_speed %f (target %f)", stage, size, duration, actual_speed,
+ mig_speed);
return sent;
}
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);
}
/* Stage2: send update pages iteratively until the size of remaining states becomes smaller than threshold value. */
- if (! skip_stage2) {
-
- int stage2_round = 0;
- for (;;) {
-
- sg_size_t updated_size = 0;
- if (stage2_round == 0) {
- /* just after stage1, nothing has been updated. But, we have to send the data updated during stage1 */
- updated_size = get_updated_size(computed_during_stage1, dp_rate, dp_cap);
- } else {
- double computed = lookup_computed_flop_counts(ms->vm, 2, stage2_round);
- updated_size = get_updated_size(computed, dp_rate, dp_cap);
- }
-
- XBT_DEBUG("mig-stage 2:%d updated_size %llu computed_during_stage1 %f dp_rate %f dp_cap %f",
- stage2_round, updated_size, computed_during_stage1, dp_rate, dp_cap);
-
- /* Check whether the remaining size is below the threshold value. If so, move to stage 3. */
- remaining_size += updated_size;
- XBT_DEBUG("mig-stage2.%d: remaining_size %f (%s threshold %f)", stage2_round,
- remaining_size, (remaining_size < threshold) ? "<" : ">", threshold);
- if (remaining_size < threshold)
- break;
-
- sg_size_t sent = 0;
- double clock_prev_send = MSG_get_clock();
- try {
- XBT_DEBUG("Stage 2, gonna send %llu", updated_size);
- sent = send_migration_data(ms->vm, ms->src_pm, ms->dst_pm, updated_size, ms->mbox, 2, stage2_round, mig_speed,
- mig_timeout);
- }
- 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)
- stop_dirty_page_tracking(ms->vm);
- return 0;
- }
- double clock_post_send = MSG_get_clock();
+ if (!skip_stage2) {
+
+ int stage2_round = 0;
+ for (;;) {
+
+ sg_size_t updated_size = 0;
+ if (stage2_round == 0) {
+ /* just after stage1, nothing has been updated. But, we have to send the data updated during stage1 */
+ updated_size = get_updated_size(computed_during_stage1, dp_rate, dp_cap);
+ } else {
+ double computed = lookup_computed_flop_counts(ms->vm, 2, stage2_round);
+ updated_size = get_updated_size(computed, dp_rate, dp_cap);
+ }
- 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);
- XBT_DEBUG("actual bandwidth %f, threshold %f", bandwidth / 1024 / 1024, threshold);
- remaining_size -= sent;
- stage2_round += 1;
- mig_timeout -= (clock_post_send - clock_prev_send);
- xbt_assert(mig_timeout > 0);
-
- } else if (sent < updated_size) {
- /* When timeout happens, we move to stage 3. The size of memory pages
- * updated before timeout must be added to the remaining size. */
- XBT_VERB("mig-stage2.%d: timeout, force moving to stage 3. sent %llu / %llu, eta %lf",
- stage2_round, sent, updated_size, (clock_post_send - clock_prev_send));
- remaining_size -= sent;
+ XBT_DEBUG("mig-stage 2:%d updated_size %llu computed_during_stage1 %f dp_rate %f dp_cap %f", stage2_round,
+ updated_size, computed_during_stage1, dp_rate, dp_cap);
- double computed = lookup_computed_flop_counts(ms->vm, 2, stage2_round);
- updated_size = get_updated_size(computed, dp_rate, dp_cap);
+ /* Check whether the remaining size is below the threshold value. If so, move to stage 3. */
remaining_size += updated_size;
- break;
- } else
- XBT_CRITICAL("bug");
+ XBT_DEBUG("mig-stage2.%d: remaining_size %f (%s threshold %f)", stage2_round, remaining_size,
+ (remaining_size < threshold) ? "<" : ">", threshold);
+ if (remaining_size < threshold)
+ break;
+
+ sg_size_t sent = 0;
+ double clock_prev_send = MSG_get_clock();
+ try {
+ XBT_DEBUG("Stage 2, gonna send %llu", updated_size);
+ sent = send_migration_data(ms->vm, ms->src_pm, ms->dst_pm, updated_size, ms->mbox, 2, stage2_round, mig_speed,
+ mig_timeout);
+ } 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)
+ stop_dirty_page_tracking(ms->vm);
+ return 0;
+ }
+ double clock_post_send = MSG_get_clock();
+
+ if (sent == updated_size) {
+ /* timeout did not happen */
+ double bandwidth = updated_size / (clock_post_send - clock_prev_send);
+ threshold = bandwidth * max_downtime;
+ XBT_DEBUG("actual bandwidth %f, threshold %f", bandwidth / 1024 / 1024, threshold);
+ remaining_size -= sent;
+ stage2_round += 1;
+ mig_timeout -= (clock_post_send - clock_prev_send);
+ xbt_assert(mig_timeout > 0);
+
+ } else if (sent < updated_size) {
+ /* When timeout happens, we move to stage 3. The size of memory pages
+ * updated before timeout must be added to the remaining size. */
+ XBT_VERB("mig-stage2.%d: timeout, force moving to stage 3. sent %llu / %llu, eta %lf", stage2_round, sent,
+ updated_size, (clock_post_send - clock_prev_send));
+ remaining_size -= sent;
+
+ double computed = lookup_computed_flop_counts(ms->vm, 2, stage2_round);
+ updated_size = get_updated_size(computed, dp_rate, dp_cap);
+ remaining_size += updated_size;
+ break;
+ } else
+ XBT_CRITICAL("bug");
+ }
}
- }
/* 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)
-{
- 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);
-
- 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);
-
-// msg_process_t tx_process, rx_process;
-// MSG_process_create(pr_rx_name, migration_rx_fun, ms, dst_pm);
-// MSG_process_create(pr_tx_name, migration_tx_fun, ms, src_pm);
-#if 1
- {
- char **argv = xbt_new(char *, 2);
- argv[0] = pr_rx_name;
- argv[1] = nullptr;
-/*rx_process = */ MSG_process_create_with_arguments(pr_rx_name, migration_rx_fun, ms, dst_pm, 1, argv);
- }
- {
- char **argv = xbt_new(char *, 2);
- argv[0] = pr_tx_name;
- argv[1] = nullptr;
-/* tx_process = */MSG_process_create_with_arguments(pr_tx_name, migration_tx_fun, ms, src_pm, 1, argv);
- }
-#endif
-
- /* wait until the migration have finished or on error has occurred */
- {
- 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
- ret = MSG_task_receive_with_timeout(&task, ms->mbox_ctl, 4);
-
- 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;
- }
- 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;
- }
-
- 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)
+void MSG_vm_migrate(msg_vm_t vm, msg_host_t dst_pm)
{
/* some thoughts:
* - One approach is ...
* The second one would be easier.
*/
- msg_host_t old_pm = (msg_host_t) simcall_vm_get_pm(vm);
+ 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(MSG_host_is_off(old_pm))
- THROWF(vm_error, 0, "SRC host(%s) seems off, cannot start a migration", sg_host_get_name(old_pm));
+ 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());
- if(MSG_host_is_off(new_pm))
- THROWF(vm_error, 0, "DST host(%s) seems off, cannot start a migration", sg_host_get_name(new_pm));
+ pimpl->isMigrating = true;
- if (!MSG_vm_is_running(vm))
- THROWF(vm_error, 0, "VM(%s) is not running", sg_host_get_name(vm));
+ struct migration_session *ms = xbt_new(struct migration_session, 1);
+ ms->vm = vm;
+ ms->src_pm = src_pm;
+ ms->dst_pm = dst_pm;
- if (MSG_vm_is_migrating(vm))
- THROWF(vm_error, 0, "VM(%s) is already migrating", sg_host_get_name(vm));
+ /* 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);
- simgrid::surf::VirtualMachineImpl* pimpl = static_cast<simgrid::surf::VirtualMachineImpl*>(vm->pimpl_);
- pimpl->isMigrating = 1;
+ char** argv = xbt_new(char*, 2);
+ argv[0] = pr_rx_name;
+ argv[1] = nullptr;
+ MSG_process_create_with_arguments(pr_rx_name, migration_rx_fun, ms, dst_pm, 1, argv);
- {
- 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");
- }
+ argv = xbt_new(char*, 2);
+ argv[0] = pr_tx_name;
+ argv[1] = nullptr;
+ MSG_process_create_with_arguments(pr_tx_name, migration_tx_fun, ms, src_pm, 1, argv);
+
+ /* wait until the migration have finished or on error has occurred */
+ 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 && 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);
+
+ 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
+ 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)");
+ THROWF(host_error, 0, "Destination host '%s' failed during the migration of VM '%s'.", dst_pm->cname(),
+ vm->cname());
}
- // This part is done in the RX code, to handle the corner case where SRC can crash just at the end of the migration
- // process. In that case, the VM has been already assigned to the DST node.
- //XBT_DEBUG("VM(%s) moved from PM(%s) to PM(%s)", vm->key, old_pm->key, new_pm->key);
- //TRACE_msg_vm_change_host(vm, old_pm, new_pm);
+ 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);
}
/** @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");
- TRACE_msg_vm_suspend(vm);
+ if (TRACE_msg_vm_is_enabled()) {
+ 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);
+ }
}
/** @brief Resume the execution of the VM. All processes on the VM run again.
*/
void MSG_vm_resume(msg_vm_t vm)
{
- simcall_vm_resume(vm);
+ static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->resume();
- TRACE_msg_vm_resume(vm);
-}
-
-
-/** @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);
- TRACE_msg_vm_save(vm);
-}
-
-/** @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);
-
- TRACE_msg_vm_restore(vm);
+ if (TRACE_msg_vm_is_enabled()) {
+ 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);
+ }
}
/** @brief Get the physical host of a given VM.
*/
msg_host_t MSG_vm_get_pm(msg_vm_t vm)
{
- return (msg_host_t) simcall_vm_get_pm(vm);
+ 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); });
}
