/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
-// QUESTIONS:
-// 1./ check how and where a new VM is added to the list of the hosts
-// 2./ Diff between SIMIX_Actions and SURF_Actions
-// => SIMIX_actions : point synchro entre processus de niveau (theoretically speaking I do not have to create such SIMIX_ACTION
-// => Surf_Actions
-
-// TODO
-// MSG_TRACE can be revisited in order to use the host
-// To implement a mixed model between workstation and vm_workstation,
-// please give a look at surf_model_private_t model_private at SURF Level and to the share resource functions
-// double (*share_resources) (double now);
-// For the action into the vm workstation model, we should be able to leverage the usual one (and if needed, look at
-// the workstation model.
+/* TODO:
+ * 1. add the support of trace
+ * 2. use parallel tasks to simulate CPU overhead and remove the very
+ * experimental code generating micro computation tasks
+ */
+
+
#include "msg_private.h"
#include "xbt/sysdep.h"
*/
int MSG_vm_is_migrating(msg_vm_t vm)
{
- return __MSG_vm_is_state(vm, SURF_VM_STATE_MIGRATING);
+ msg_host_priv_t priv = msg_host_resource_priv(vm);
+ return priv->is_migrating;
}
/** @brief Returns whether the given VM is currently suspended, not running.
*/
void MSG_vm_destroy(msg_vm_t vm)
{
+ if (MSG_vm_is_migrating(vm))
+ THROWF(vm_error, 0, "VM(%s) is migrating", sg_host_name(vm));
+
/* First, terminate all processes on the VM if necessary */
if (MSG_vm_is_running(vm))
simcall_vm_shutdown(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(const char *vm_name, const char *src_pm_name, const char *dst_pm_name)
+static inline char *get_mig_mbox_src_dst(msg_vm_t vm, msg_host_t src_pm, msg_host_t dst_pm)
{
+ char *vm_name = sg_host_name(vm);
+ char *src_pm_name = sg_host_name(src_pm);
+ char *dst_pm_name = sg_host_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(const char *vm_name, const char *src_pm_name, const char *dst_pm_name)
+static inline char *get_mig_mbox_ctl(msg_vm_t vm, msg_host_t src_pm, msg_host_t dst_pm)
{
+ char *vm_name = sg_host_name(vm);
+ char *src_pm_name = sg_host_name(src_pm);
+ char *dst_pm_name = sg_host_name(dst_pm);
+
return bprintf("__mbox_mig_ctl:%s(%s-%s)", vm_name, src_pm_name, dst_pm_name);
}
-static inline char *get_mig_process_tx_name(const char *vm_name, const char *src_pm_name, const char *dst_pm_name)
+static inline char *get_mig_process_tx_name(msg_vm_t vm, msg_host_t src_pm, msg_host_t dst_pm)
{
+ char *vm_name = sg_host_name(vm);
+ char *src_pm_name = sg_host_name(src_pm);
+ char *dst_pm_name = sg_host_name(dst_pm);
+
return bprintf("__pr_mig_tx:%s(%s-%s)", vm_name, src_pm_name, dst_pm_name);
}
-static inline char *get_mig_process_rx_name(const char *vm_name, const char *src_pm_name, const char *dst_pm_name)
+static inline char *get_mig_process_rx_name(msg_vm_t vm, msg_host_t src_pm, msg_host_t dst_pm)
{
+ char *vm_name = sg_host_name(vm);
+ char *src_pm_name = sg_host_name(src_pm);
+ char *dst_pm_name = sg_host_name(dst_pm);
+
return bprintf("__pr_mig_rx:%s(%s-%s)", vm_name, src_pm_name, dst_pm_name);
}
-static inline char *get_mig_task_name(const char *vm_name, const char *src_pm_name, const char *dst_pm_name, int stage)
+static inline char *get_mig_task_name(msg_vm_t vm, msg_host_t src_pm, msg_host_t dst_pm, int stage)
{
+ char *vm_name = sg_host_name(vm);
+ char *src_pm_name = sg_host_name(src_pm);
+ char *dst_pm_name = sg_host_name(dst_pm);
+
return bprintf("__task_mig_stage%d:%s(%s-%s)", stage, vm_name, src_pm_name, dst_pm_name);
}
static void launch_deferred_exec_process(msg_host_t host, double computation, double prio);
+
+struct migration_session {
+ msg_vm_t vm;
+ msg_host_t src_pm;
+ msg_host_t dst_pm;
+
+ /* The miration_rx process uses mbox_ctl to let the caller of do_migration()
+ * know the completion of the migration. */
+ char *mbox_ctl;
+ /* The migration_rx and migration_tx processes use mbox to transfer migration
+ * data. */
+ char *mbox;
+};
+
+
static int migration_rx_fun(int argc, char *argv[])
{
XBT_DEBUG("mig: rx_start");
- xbt_assert(argc == 4);
- const char *vm_name = argv[1];
- const char *src_pm_name = argv[2];
- const char *dst_pm_name = argv[3];
- msg_vm_t vm = MSG_get_host_by_name(vm_name);
- msg_host_t src_pm = MSG_get_host_by_name(src_pm_name);
- msg_host_t dst_pm = MSG_get_host_by_name(dst_pm_name);
+ struct migration_session *ms = MSG_process_get_data(MSG_process_self());
s_ws_params_t params;
- simcall_host_get_params(vm, ¶ms);
+ simcall_host_get_params(ms->vm, ¶ms);
const double xfer_cpu_overhead = params.xfer_cpu_overhead;
-
int need_exit = 0;
- char *mbox = get_mig_mbox_src_dst(vm_name, src_pm_name, dst_pm_name);
- char *mbox_ctl = get_mig_mbox_ctl(vm_name, src_pm_name, dst_pm_name);
- char *finalize_task_name = get_mig_task_name(vm_name, src_pm_name, dst_pm_name, 3);
+ char *finalize_task_name = get_mig_task_name(ms->vm, ms->src_pm, ms->dst_pm, 3);
for (;;) {
msg_task_t task = NULL;
- MSG_task_recv(&task, mbox);
+ MSG_task_recv(&task, ms->mbox);
{
double received = MSG_task_get_data_size(task);
/* TODO: clean up */
// const double alpha = 0.22L * 1.0E8 / (80L * 1024 * 1024);
- launch_deferred_exec_process(vm, received * xfer_cpu_overhead, 1);
+ launch_deferred_exec_process(ms->vm, received * xfer_cpu_overhead, 1);
}
if (strcmp(task->name, finalize_task_name) == 0)
}
- /* deinstall the current affinity setting */
- simcall_vm_set_affinity(vm, src_pm, 0);
+ /* deinstall the current affinity setting for the CPU */
+ simcall_vm_set_affinity(ms->vm, ms->src_pm, 0);
- simcall_vm_migrate(vm, dst_pm);
- simcall_vm_resume(vm);
+ /* Update the vm location */
+ simcall_vm_migrate(ms->vm, ms->dst_pm);
+
+ /* Resume the VM */
+ simcall_vm_resume(ms->vm);
/* install the affinity setting of the VM on the destination pm */
{
- msg_host_priv_t priv = msg_host_resource_priv(vm);
+ msg_host_priv_t priv = msg_host_resource_priv(ms->vm);
- unsigned long affinity_mask = (unsigned long) xbt_dict_get_or_null_ext(priv->affinity_mask_db, (char *) dst_pm, sizeof(msg_host_t));
- simcall_vm_set_affinity(vm, dst_pm, affinity_mask);
- XBT_INFO("set affinity(0x%04lx@%s) for %s", affinity_mask, MSG_host_get_name(dst_pm), MSG_host_get_name(vm));
+ unsigned long affinity_mask = (unsigned long) xbt_dict_get_or_null_ext(priv->affinity_mask_db, (char *) ms->dst_pm, sizeof(msg_host_t));
+ simcall_vm_set_affinity(ms->vm, ms->dst_pm, affinity_mask);
+ XBT_INFO("set affinity(0x%04lx@%s) for %s", affinity_mask, MSG_host_get_name(ms->dst_pm), MSG_host_get_name(ms->vm));
}
{
- char *task_name = get_mig_task_name(vm_name, src_pm_name, dst_pm_name, 4);
+ char *task_name = get_mig_task_name(ms->vm, ms->src_pm, ms->dst_pm, 4);
msg_task_t task = MSG_task_create(task_name, 0, 0, NULL);
- msg_error_t ret = MSG_task_send(task, mbox_ctl);
+ msg_error_t ret = MSG_task_send(task, ms->mbox_ctl);
xbt_assert(ret == MSG_OK);
xbt_free(task_name);
}
- xbt_free(mbox);
- xbt_free(mbox_ctl);
xbt_free(finalize_task_name);
XBT_DEBUG("mig: rx_done");
#endif
-static void send_migration_data(const char *vm_name, const char *src_pm_name, const char *dst_pm_name,
+static void 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 xfer_cpu_overhead)
{
- char *task_name = get_mig_task_name(vm_name, src_pm_name, dst_pm_name, stage);
+ char *task_name = get_mig_task_name(vm, src_pm, dst_pm, stage);
msg_task_t task = MSG_task_create(task_name, 0, size, NULL);
/* TODO: clean up */
return updated_size;
}
-static double send_stage1(msg_host_t vm, const char *src_pm_name, const char *dst_pm_name,
+static double send_stage1(struct migration_session *ms,
sg_size_t ramsize, double mig_speed, double xfer_cpu_overhead, double dp_rate, double dp_cap, double dpt_cpu_overhead)
{
- const char *vm_name = MSG_host_get_name(vm);
- char *mbox = get_mig_mbox_src_dst(vm_name, src_pm_name, dst_pm_name);
// const long chunksize = (sg_size_t)1024 * 1024 * 100;
const sg_size_t chunksize = (sg_size_t)1024 * 1024 * 100000;
remaining -= datasize;
- send_migration_data(vm_name, src_pm_name, dst_pm_name, datasize, mbox, 1, 0, mig_speed, xfer_cpu_overhead);
- double computed = lookup_computed_flop_counts(vm, 1, 0);
+ send_migration_data(ms->vm, ms->src_pm, ms->dst_pm, datasize, ms->mbox, 1, 0, mig_speed, xfer_cpu_overhead);
+ double computed = lookup_computed_flop_counts(ms->vm, 1, 0);
computed_total += computed;
// {
// launch_deferred_exec_process(vm, overhead, 10000);
// }
}
- xbt_free(mbox);
+
return computed_total;
}
{
XBT_DEBUG("mig: tx_start");
- xbt_assert(argc == 4);
- const char *vm_name = argv[1];
- const char *src_pm_name = argv[2];
- const char *dst_pm_name = argv[3];
- msg_vm_t vm = MSG_get_host_by_name(vm_name);
-
+ struct migration_session *ms = MSG_process_get_data(MSG_process_self());
s_ws_params_t params;
- simcall_host_get_params(vm, ¶ms);
+ simcall_host_get_params(ms->vm, ¶ms);
const sg_size_t ramsize = params.ramsize;
const sg_size_t devsize = params.devsize;
const int skip_stage1 = params.skip_stage1;
if (ramsize == 0)
XBT_WARN("migrate a VM, but ramsize is zero");
- char *mbox = get_mig_mbox_src_dst(vm_name, src_pm_name, dst_pm_name);
XBT_INFO("mig-stage1: remaining_size %f", remaining_size);
/* Stage1: send all memory pages to the destination. */
- start_dirty_page_tracking(vm);
+ start_dirty_page_tracking(ms->vm);
double computed_during_stage1 = 0;
if (!skip_stage1) {
/* send ramsize, but split it */
double clock_prev_send = MSG_get_clock();
- computed_during_stage1 = send_stage1(vm, src_pm_name, dst_pm_name, ramsize, mig_speed, xfer_cpu_overhead, dp_rate, dp_cap, dpt_cpu_overhead);
+ computed_during_stage1 = send_stage1(ms, ramsize, mig_speed, xfer_cpu_overhead, dp_rate, dp_cap, dpt_cpu_overhead);
remaining_size -= ramsize;
double clock_post_send = MSG_get_clock();
/* 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(vm, 2, stage2_round);
+ double computed = lookup_computed_flop_counts(ms->vm, 2, stage2_round);
updated_size = get_updated_size(computed, dp_rate, dp_cap);
}
double clock_prev_send = MSG_get_clock();
- send_migration_data(vm_name, src_pm_name, dst_pm_name, updated_size, mbox, 2, stage2_round, mig_speed, xfer_cpu_overhead);
+ send_migration_data(ms->vm, ms->src_pm, ms->dst_pm, updated_size, ms->mbox, 2, stage2_round, mig_speed, xfer_cpu_overhead);
double clock_post_send = MSG_get_clock();
XBT_INFO("actual bandwidth %f, threshold %f", bandwidth / 1024 / 1024, threshold);
-
-
-
-
-
remaining_size -= updated_size;
stage2_round += 1;
}
stage3:
/* Stage3: stop the VM and copy the rest of states. */
XBT_INFO("mig-stage3: remaining_size %f", remaining_size);
- simcall_vm_suspend(vm);
- stop_dirty_page_tracking(vm);
+ simcall_vm_suspend(ms->vm);
+ stop_dirty_page_tracking(ms->vm);
- send_migration_data(vm_name, src_pm_name, dst_pm_name, remaining_size, mbox, 3, 0, mig_speed, xfer_cpu_overhead);
+ send_migration_data(ms->vm, ms->src_pm, ms->dst_pm, remaining_size, ms->mbox, 3, 0, mig_speed, xfer_cpu_overhead);
- xbt_free(mbox);
XBT_DEBUG("mig: tx_done");
static void do_migration(msg_vm_t vm, msg_host_t src_pm, msg_host_t dst_pm)
{
- char *mbox_ctl = get_mig_mbox_ctl(sg_host_name(vm), sg_host_name(src_pm), sg_host_name(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_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] = NULL;
+ 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] = NULL;
+ MSG_process_create_with_arguments(pr_tx_name, migration_tx_fun, ms, src_pm, 1, argv);
+ }
+#endif
+
- {
- char *pr_name = get_mig_process_rx_name(sg_host_name(vm), sg_host_name(src_pm), sg_host_name(dst_pm));
- int nargvs = 5;
- char **argv = xbt_new(char *, nargvs);
- argv[0] = pr_name;
- argv[1] = xbt_strdup(sg_host_name(vm));
- argv[2] = xbt_strdup(sg_host_name(src_pm));
- argv[3] = xbt_strdup(sg_host_name(dst_pm));
- argv[4] = NULL;
-
- MSG_process_create_with_arguments(pr_name, migration_rx_fun, NULL, dst_pm, nargvs - 1, argv);
- }
- {
- char *pr_name = get_mig_process_tx_name(sg_host_name(vm), sg_host_name(src_pm), sg_host_name(dst_pm));
- int nargvs = 5;
- char **argv = xbt_new(char *, nargvs);
- argv[0] = pr_name;
- argv[1] = xbt_strdup(sg_host_name(vm));
- argv[2] = xbt_strdup(sg_host_name(src_pm));
- argv[3] = xbt_strdup(sg_host_name(dst_pm));
- argv[4] = NULL;
- MSG_process_create_with_arguments(pr_name, migration_tx_fun, NULL, src_pm, nargvs - 1, argv);
- }
/* wait until the migration have finished */
{
msg_task_t task = NULL;
- msg_error_t ret = MSG_task_recv(&task, mbox_ctl);
+ msg_error_t ret = MSG_task_recv(&task, ms->mbox_ctl);
xbt_assert(ret == MSG_OK);
- char *expected_task_name = get_mig_task_name(sg_host_name(vm), sg_host_name(src_pm), sg_host_name(dst_pm), 4);
+ 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);
}
- xbt_free(mbox_ctl);
+ xbt_free(ms->mbox_ctl);
+ xbt_free(ms->mbox);
+ xbt_free(ms);
}
msg_host_t old_pm = simcall_vm_get_pm(vm);
- if (simcall_vm_get_state(vm) != SURF_VM_STATE_RUNNING)
+ if (!MSG_vm_is_running(vm))
THROWF(vm_error, 0, "VM(%s) is not running", sg_host_name(vm));
- do_migration(vm, old_pm, new_pm);
+ if (MSG_vm_is_migrating(vm))
+ THROWF(vm_error, 0, "VM(%s) is already migrating", sg_host_name(vm));
+ msg_host_priv_t priv = msg_host_resource_priv(vm);
+ priv->is_migrating = 1;
+
+ do_migration(vm, old_pm, new_pm);
+ priv->is_migrating = 0;
XBT_DEBUG("VM(%s) moved from PM(%s) to PM(%s)", vm->key, old_pm->key, new_pm->key);
*/
void MSG_vm_suspend(msg_vm_t vm)
{
+ if (MSG_vm_is_migrating(vm))
+ THROWF(vm_error, 0, "VM(%s) is migrating", sg_host_name(vm));
+
simcall_vm_suspend(vm);
XBT_DEBUG("vm_suspend done");
*/
void MSG_vm_save(msg_vm_t vm)
{
+ if (MSG_vm_is_migrating(vm))
+ THROWF(vm_error, 0, "VM(%s) is migrating", sg_host_name(vm));
+
simcall_vm_save(vm);
#ifdef HAVE_TRACING
TRACE_msg_vm_save(vm);