/** @brief Create a new VM with specified parameters.
* @ingroup msg_VMs*
+ * All parameters are in MBytes
*
*/
-msg_vm_t MSG_vm_create(msg_host_t ind_pm, const char *name,
- int ncpus, long ramsize, long net_cap, char *disk_path, long disksize)
+msg_vm_t MSG_vm_create(msg_host_t ind_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 vm = MSG_vm_create_core(ind_pm, name);
-
- {
- s_ws_params_t params;
- memset(¶ms, 0, sizeof(params));
- params.ramsize = ramsize;
- //params.overcommit = 0;
- simcall_host_set_params(vm, ¶ms);
- }
-
- /* TODO: Limit net capability, take into account disk considerations. */
-
- return vm;
+ /* For the moment, intensity_rate is the percentage against the migration bandwidth */
+ double host_speed = MSG_get_host_speed(ind_pm);
+ double update_speed = ((double)dp_intensity/100) * mig_netspeed;
+
+ msg_vm_t vm = MSG_vm_create_core(ind_pm, name);
+ s_ws_params_t params;
+ memset(¶ms, 0, sizeof(params));
+ params.ramsize = 1L * 1024 * 1024 * ramsize;
+ //params.overcommit = 0;
+ params.devsize = 0;
+ params.skip_stage2 = 0;
+ params.max_downtime = 0.03;
+ params.dp_rate = (update_speed * 1L * 1024 * 1024 ) / host_speed;
+ params.dp_cap = params.ramsize / 0.9; // working set memory is 90%
+ params.mig_speed = 1L * 1024 * 1024 * mig_netspeed; // 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);
+ simcall_host_set_params(vm, ¶ms);
+
+ return vm;
}
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);
+static void launch_deferred_exec_process(msg_host_t host, double computation, double prio);
static int migration_rx_fun(int argc, char *argv[])
{
- const char *pr_name = MSG_process_get_name(MSG_process_self());
- const char *host_name = MSG_host_get_name(MSG_host_self());
-
XBT_DEBUG("mig: rx_start");
xbt_assert(argc == 4);
msg_vm_t vm = MSG_get_host_by_name(vm_name);
msg_vm_t dst_pm = MSG_get_host_by_name(dst_pm_name);
+
+ s_ws_params_t params;
+ simcall_host_get_params(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);
MSG_task_recv(&task, mbox);
{
double received = MSG_task_get_data_size(task);
- /* TODO */
- const double alpha = 0.22L * 1.0E8 / (80L * 1024 * 1024);
- launch_deferred_exec_process(vm, received * alpha);
+ /* TODO: clean up */
+ // const double alpha = 0.22L * 1.0E8 / (80L * 1024 * 1024);
+ launch_deferred_exec_process(vm, received * xfer_cpu_overhead, 1);
}
if (strcmp(task->name, finalize_task_name) == 0)
return 0;
}
-
-typedef struct dirty_page {
- double prev_clock;
- double prev_remaining;
- msg_task_t task;
-} s_dirty_page, *dirty_page_t;
-
-
static void reset_dirty_pages(msg_vm_t vm)
{
msg_host_priv_t priv = msg_host_resource_priv(vm);
}
#endif
-double get_computed(char *key, msg_vm_t vm, dirty_page_t dp, double remaining, double clock)
+static double get_computed(char *key, msg_vm_t vm, dirty_page_t dp, double remaining, double clock)
{
double computed = dp->prev_remaining - remaining;
double duration = clock - dp->prev_clock;
return computed;
}
-static double lookup_computed_flop_counts(msg_vm_t vm, int stage2_round_for_fancy_debug)
+static double lookup_computed_flop_counts(msg_vm_t vm, int stage_for_fancy_debug, int stage2_round_for_fancy_debug)
{
msg_host_priv_t priv = msg_host_resource_priv(vm);
double total = 0;
total += priv->dp_updated_by_deleted_tasks;
- XBT_INFO("mig-stage2.%d: computed %f flop_counts (including %f by deleted tasks)",
+ XBT_INFO("mig-stage%d.%d: computed %f flop_counts (including %f by deleted tasks)",
+ stage_for_fancy_debug,
stage2_round_for_fancy_debug,
total, priv->dp_updated_by_deleted_tasks);
static int deferred_exec_fun(int argc, char *argv[])
{
- xbt_assert(argc == 2);
+ xbt_assert(argc == 3);
const char *comp_str = argv[1];
double computaion = atof(comp_str);
+ const char *prio_str = argv[2];
+ double prio = atof(prio_str);
msg_task_t task = MSG_task_create("__task_deferred", computaion, 0, NULL);
// XBT_INFO("exec deferred %f", computaion);
/* dpt is the results of the VM activity */
- MSG_task_set_priority(task, 1000000);
+ MSG_task_set_priority(task, prio);
MSG_task_execute(task);
return 0;
}
-static void launch_deferred_exec_process(msg_host_t host, double computation)
+static void launch_deferred_exec_process(msg_host_t host, double computation, double prio)
{
char *pr_name = bprintf("__pr_deferred_exec_%s", MSG_host_get_name(host));
- int nargvs = 3;
+ int nargvs = 4;
char **argv = xbt_new(char *, nargvs);
argv[0] = xbt_strdup(pr_name);
argv[1] = bprintf("%lf", computation);
- argv[2] = NULL;
+ argv[2] = bprintf("%lf", prio);
+ argv[3] = NULL;
- msg_process_t pr = MSG_process_create_with_arguments(pr_name, deferred_exec_fun, NULL, host, nargvs - 1, argv);
+ MSG_process_create_with_arguments(pr_name, deferred_exec_fun, NULL, host, nargvs - 1, argv);
xbt_free(pr_name);
}
int need_exit = 0;
- XBT_INFO("start %s", mbox);
+ // XBT_INFO("start %s", mbox);
for (;;) {
msg_task_t task = NULL;
need_exit = 1;
// XBT_INFO("exec");
+ // MSG_task_set_priority(task, 1000000);
MSG_task_execute(task);
MSG_task_destroy(task);
break;
}
- XBT_INFO("bye");
+ // XBT_INFO("bye");
return 0;
}
argv[1] = xbt_strdup(mbox);
argv[2] = NULL;
- XBT_INFO("micro start: mbox %s", mbox);
- msg_process_t pr = MSG_process_create_with_arguments(pr_name, task_tx_overhead_fun, NULL, MSG_host_self(), nargvs - 1, argv);
+ // XBT_INFO("micro start: mbox %s", mbox);
+ MSG_process_create_with_arguments(pr_name, task_tx_overhead_fun, NULL, MSG_host_self(), nargvs - 1, argv);
xbt_free(pr_name);
xbt_free(mbox);
msg_task_t task = MSG_task_create("finalize_making_overhead", 0, 0, NULL);
- XBT_INFO("micro shutdown: mbox %s", mbox);
+ // XBT_INFO("micro shutdown: mbox %s", mbox);
msg_error_t ret = MSG_task_send(task, mbox);
xbt_assert(ret == MSG_OK);
xbt_free(mbox);
- XBT_INFO("shutdown done");
+ // XBT_INFO("shutdown done");
}
static void request_overhead(msg_task_t comm_task, double computation)
msg_task_t task = MSG_task_create("micro", computation, 0, NULL);
- XBT_INFO("req overhead");
+ // XBT_INFO("req overhead");
msg_error_t ret = MSG_task_send(task, mbox);
xbt_assert(ret == MSG_OK);
* */
static void task_send_bounded_with_cpu_overhead(msg_task_t comm_task, char *mbox, double mig_speed, double alpha)
{
- const double chunk_size = 1024 * 1024;
+ const double chunk_size = 1024 * 1024 * 10;
double remaining = MSG_task_get_data_size(comm_task);
start_overhead_process(comm_task);
remaining -= data_size;
- XBT_INFO("remaining %f bytes", remaining);
+ // XBT_INFO("remaining %f bytes", remaining);
double clock_sta = MSG_get_clock();
MSG_process_sleep(time_to_sleep);
- XBT_INFO("duration %f", clock_end - clock_sta);
- XBT_INFO("time_to_sleep %f", time_to_sleep);
+ //XBT_INFO("duration %f", clock_end - clock_sta);
+ //XBT_INFO("time_to_sleep %f", time_to_sleep);
}
}
- XBT_INFO("%s", MSG_task_get_name(comm_task));
+ // XBT_INFO("%s", MSG_task_get_name(comm_task));
shutdown_overhead_process(comm_task);
}
#define USE_MICRO_TASK 1
+#if 0
+// const double alpha = 0.1L * 1.0E8 / (32L * 1024 * 1024);
+// const double alpha = 0.25L * 1.0E8 / (85L * 1024 * 1024);
+// const double alpha = 0.20L * 1.0E8 / (85L * 1024 * 1024);
+// const double alpha = 0.25L * 1.0E8 / (85L * 1024 * 1024);
+// const double alpha = 0.32L * 1.0E8 / (24L * 1024 * 1024); // makes super good values for 32 mbytes/s
+//const double alpha = 0.32L * 1.0E8 / (32L * 1024 * 1024);
+// const double alpha = 0.56L * 1.0E8 / (80L * 1024 * 1024);
+////const double alpha = 0.20L * 1.0E8 / (80L * 1024 * 1024);
+// const double alpha = 0.56L * 1.0E8 / (90L * 1024 * 1024);
+// const double alpha = 0.66L * 1.0E8 / (90L * 1024 * 1024);
+// const double alpha = 0.20L * 1.0E8 / (80L * 1024 * 1024);
+
+/* CPU 22% when 80Mbyte/s */
+const double alpha = 0.22L * 1.0E8 / (80L * 1024 * 1024);
+#endif
+
+
static void send_migration_data(const char *vm_name, const char *src_pm_name, const char *dst_pm_name,
- double size, char *mbox, int stage, int stage2_round, double mig_speed)
+ double 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);
msg_task_t task = MSG_task_create(task_name, 0, size, NULL);
+ /* TODO: clean up */
double clock_sta = MSG_get_clock();
#ifdef USE_MICRO_TASK
- // const double alpha = 0.1L * 1.0E8 / (32L * 1024 * 1024);
- // const double alpha = 0.25L * 1.0E8 / (85L * 1024 * 1024);
- // const double alpha = 0.20L * 1.0E8 / (85L * 1024 * 1024);
- // const double alpha = 0.25L * 1.0E8 / (85L * 1024 * 1024);
- // const double alpha = 0.32L * 1.0E8 / (24L * 1024 * 1024); // makes super good values for 32 mbytes/s
- //const double alpha = 0.32L * 1.0E8 / (32L * 1024 * 1024);
- // const double alpha = 0.56L * 1.0E8 / (80L * 1024 * 1024);
- ////const double alpha = 0.20L * 1.0E8 / (80L * 1024 * 1024);
- // const double alpha = 0.56L * 1.0E8 / (90L * 1024 * 1024);
- // const double alpha = 0.66L * 1.0E8 / (90L * 1024 * 1024);
-
- // const double alpha = 0.20L * 1.0E8 / (80L * 1024 * 1024);
- const double alpha = 0.22L * 1.0E8 / (80L * 1024 * 1024);
-
- task_send_bounded_with_cpu_overhead(task, mbox, mig_speed, alpha);
+
+ task_send_bounded_with_cpu_overhead(task, mbox, mig_speed, xfer_cpu_overhead);
#else
msg_error_t ret;
double duration = clock_end - clock_sta;
double actual_speed = size / duration;
#ifdef USE_MICRO_TASK
- double cpu_utilization = size * alpha / duration / 1.0E8;
+ double cpu_utilization = size * xfer_cpu_overhead / duration / 1.0E8;
#else
double cpu_utilization = 0;
#endif
#endif
}
+static double get_updated_size(double computed, double dp_rate, double dp_cap)
+{
+ double updated_size = computed * dp_rate;
+ XBT_INFO("updated_size %f dp_rate %f", updated_size, dp_rate);
+ if (updated_size > dp_cap) {
+ // XBT_INFO("mig-stage2.%d: %f bytes updated, but cap it with the working set size %f", stage2_round, updated_size, dp_cap);
+ updated_size = dp_cap;
+ }
-static int migration_tx_fun(int argc, char *argv[])
+ return updated_size;
+}
+
+static double send_stage1(msg_host_t vm, const char *src_pm_name, const char *dst_pm_name,
+ long ramsize, double mig_speed, double xfer_cpu_overhead, double dp_rate, double dp_cap, double dpt_cpu_overhead)
{
- const char *pr_name = MSG_process_get_name(MSG_process_self());
- const char *host_name = MSG_host_get_name(MSG_host_self());
+ 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 = 1024 * 1024 * 100;
+ long remaining = ramsize;
+ double computed_total = 0;
+
+ while (remaining > 0) {
+ long datasize = chunksize;
+ if (remaining < chunksize)
+ datasize = remaining;
+
+ 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);
+ computed_total += computed;
+
+ {
+ double updated_size = get_updated_size(computed, dp_rate, dp_cap);
+ double overhead = dpt_cpu_overhead * updated_size;
+ launch_deferred_exec_process(vm, overhead, 10000);
+ }
+ }
+
+ return computed_total;
+}
+
+
+
+
+static int migration_tx_fun(int argc, char *argv[])
+{
XBT_DEBUG("mig: tx_start");
xbt_assert(argc == 4);
const double dp_rate = params.dp_rate;
const double dp_cap = params.dp_cap;
const double mig_speed = params.mig_speed;
+ const double xfer_cpu_overhead = params.xfer_cpu_overhead;
+ const double dpt_cpu_overhead = params.dpt_cpu_overhead;
+
double remaining_size = ramsize + devsize;
double max_downtime = params.max_downtime;
/* Stage1: send all memory pages to the destination. */
start_dirty_page_tracking(vm);
+ double computed_during_stage1 = 0;
if (!skip_stage1) {
- send_migration_data(vm_name, src_pm_name, dst_pm_name, ramsize, mbox, 1, 0, mig_speed);
+ // send_migration_data(vm_name, src_pm_name, dst_pm_name, ramsize, mbox, 1, 0, mig_speed, xfer_cpu_overhead);
+
+ /* send ramsize, but split it */
+ 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);
remaining_size -= ramsize;
}
-
/* Stage2: send update pages iteratively until the size of remaining states
* becomes smaller than the threshold value. */
if (skip_stage2)
int stage2_round = 0;
for (;;) {
- // long updated_size = lookup_dirty_pages(vm);
- double updated_size = lookup_computed_flop_counts(vm, stage2_round) * dp_rate;
- if (updated_size > dp_cap) {
- XBT_INFO("mig-stage2.%d: %f bytes updated, but cap it with the working set size %f",
- stage2_round, updated_size, dp_cap);
- updated_size = dp_cap;
+
+ double 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(vm, 2, stage2_round);
+ updated_size = get_updated_size(computed, dp_rate, dp_cap);
}
+ XBT_INFO("%d updated_size %f computed_during_stage1 %f dp_rate %f dp_cap %f",
+ stage2_round, updated_size, computed_during_stage1, dp_rate, dp_cap);
- // double dpt_overhead_parameter = 1.0L * 1E8 / 0.5 / 40 / 1024 / 1024 * 1000 * 1000 * 1000 * 1000 * 1000; // super cool, but 520 for 0 32 8g 75%
- // double dpt_overhead_parameter = 1.0L * 1E8 / 0.5 / 40 / 1024 / 1024 * 1000 * 1000 * 1000 * 1000 * 1000 * 1000 * 1000;
- // double dpt_overhead_parameter = 1.0L * 1E8 / 0.5 / 40 / 1024 / 1024 * 1000 * 1000 * 1000 * 1000;
- double dpt_overhead_parameter = 1.0L * 1E8 / 0.5 / 40 / 1024 / 1024 * 1000 * 1000 * 1000 * 1000 * 1000 * 1000;
- double overhead = dpt_overhead_parameter * updated_size;
- XBT_INFO("updated %f overhead %f", updated_size, overhead);
- launch_deferred_exec_process(vm, overhead);
+ if (stage2_round != 0) {
+ /* during stage1, we have already created overhead tasks */
+ double overhead = dpt_cpu_overhead * updated_size;
+ XBT_INFO("updated %f overhead %f", updated_size, overhead);
+ launch_deferred_exec_process(vm, overhead, 10000);
+ }
- remaining_size += updated_size;
- XBT_INFO("mig-stage2.%d: remaining_size %f (%s threshold %f)", stage2_round,
- remaining_size, (remaining_size < threshold) ? "<" : ">", threshold);
+ {
+ remaining_size += updated_size;
- if (remaining_size < threshold)
- break;
+ XBT_INFO("mig-stage2.%d: remaining_size %f (%s threshold %f)", stage2_round,
+ remaining_size, (remaining_size < threshold) ? "<" : ">", threshold);
- send_migration_data(vm_name, src_pm_name, dst_pm_name, updated_size, mbox, 2, stage2_round, mig_speed);
+ if (remaining_size < threshold)
+ break;
+ }
+
+
+ send_migration_data(vm_name, src_pm_name, dst_pm_name, updated_size, mbox, 2, stage2_round, mig_speed, xfer_cpu_overhead);
remaining_size -= updated_size;
stage2_round += 1;
simcall_vm_suspend(vm);
stop_dirty_page_tracking(vm);
- send_migration_data(vm_name, src_pm_name, dst_pm_name, remaining_size, mbox, 3, 0, mig_speed);
+ send_migration_data(vm_name, src_pm_name, dst_pm_name, remaining_size, mbox, 3, 0, mig_speed, xfer_cpu_overhead);
xbt_free(mbox);
argv[3] = xbt_strdup(sg_host_name(dst_pm));
argv[4] = NULL;
- msg_process_t pr = MSG_process_create_with_arguments(pr_name, migration_rx_fun, NULL, dst_pm, nargvs - 1, argv);
+ MSG_process_create_with_arguments(pr_name, migration_rx_fun, NULL, dst_pm, nargvs - 1, argv);
xbt_free(pr_name);
}
argv[2] = xbt_strdup(sg_host_name(src_pm));
argv[3] = xbt_strdup(sg_host_name(dst_pm));
argv[4] = NULL;
- msg_process_t pr = MSG_process_create_with_arguments(pr_name, migration_tx_fun, NULL, src_pm, nargvs - 1, argv);
+ MSG_process_create_with_arguments(pr_name, migration_tx_fun, NULL, src_pm, nargvs - 1, argv);
xbt_free(pr_name);
}
}
-
-
/** @brief Get the physical host of a given VM.
* @ingroup msg_VMs
*/
{
return simcall_vm_get_pm(vm);
}
+
+
+/** @brief Set a CPU bound for a given VM.
+ * @ingroup msg_VMs
+ *
+ * 1.
+ * Note that in some cases MSG_task_set_bound() may not intuitively work for VMs.
+ *
+ * For example,
+ * On PM0, there are Task1 and VM0.
+ * On VM0, there is Task2.
+ * Now we bound 75% to Task1@PM0 and bound 25% to Task2@VM0.
+ * Then,
+ * Task1@PM0 gets 50%.
+ * Task2@VM0 gets 25%.
+ * This is NOT 75% for Task1@PM0 and 25% for Task2@VM0, respectively.
+ *
+ * This is because a VM has the dummy CPU action in the PM layer. Putting a
+ * task on the VM does not affect the bound of the dummy CPU action. The bound
+ * of the dummy CPU action is unlimited.
+ *
+ * There are some solutions for this problem. One option is to update the bound
+ * of the dummy CPU action automatically. It should be the sum of all tasks on
+ * the VM. But, this solution might be costy, because we have to scan all tasks
+ * on the VM in share_resource() or we have to trap both the start and end of
+ * task execution.
+ *
+ * The current solution is to use MSG_vm_set_bound(), which allows us to
+ * directly set the bound of the dummy CPU action.
+ *
+ *
+ * 2.
+ * Note that bound == 0 means no bound (i.e., unlimited).
+ */
+void MSG_vm_set_bound(msg_vm_t vm, double bound)
+{
+ return simcall_vm_set_bound(vm, bound);
+}
