-/* Copyright (c) 2012. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2012-2013. The SimGrid Team.
+ * All rights reserved. */
/* 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. */
#include "msg_private.h"
#include "xbt/sysdep.h"
#include "xbt/log.h"
+#include "simgrid/platf.h"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_vm, msg,
"Cloud-oriented parts of the MSG API");
/** @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;
}
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_vm_t dst_pm = MSG_get_host_by_name(dst_pm_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);
s_ws_params_t params;
}
+ /* deinstall the current affinity setting */
+ simcall_vm_set_affinity(vm, src_pm, 0);
+
simcall_vm_migrate(vm, dst_pm);
simcall_vm_resume(vm);
+ /* install the affinity setting of the VM on the destination pm */
+ {
+ msg_host_priv_t priv = msg_host_resource_priv(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));
+ }
+
{
char *task_name = get_mig_task_name(vm_name, src_pm_name, dst_pm_name, 4);
}
#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;
dirty_page_t dp = NULL;
xbt_dict_foreach(priv->dp_objs, cursor, key, dp) {
double remaining = MSG_task_get_remaining_computation(dp->task);
- double clock = MSG_get_clock();
+
+ double clock = MSG_get_clock();
// total += calc_updated_pages(key, vm, dp, remaining, clock);
total += get_computed(key, vm, dp, remaining, clock);
total += priv->dp_updated_by_deleted_tasks;
- XBT_INFO("mig-stage%d.%d: computed %f flop_counts (including %f by deleted tasks)",
+ XBT_DEBUG("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);
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);
}
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);
+ 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);
}
#endif
-#define USE_MICRO_TASK 1
+// #define USE_MICRO_TASK 1
#if 0
// const double alpha = 0.1L * 1.0E8 / (32L * 1024 * 1024);
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 xfer_cpu_overhead)
+ 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);
msg_task_t task = MSG_task_create(task_name, 0, size, NULL);
- if (stage == 2)
- XBT_INFO("mig-stage%d.%d: sent %f duration %f actual_speed %f (target %f) cpu %f", stage, stage2_round, size, duration, actual_speed, mig_speed, cpu_utilization);
- else
- XBT_INFO("mig-stage%d: sent %f duration %f actual_speed %f (target %f) cpu %f", stage, size, duration, actual_speed, mig_speed, cpu_utilization);
+ if (stage == 2){
+ XBT_DEBUG("mig-stage%d.%d: sent %" PRIu64 " duration %f actual_speed %f (target %f) cpu %f", stage, stage2_round, size, duration, actual_speed, mig_speed, cpu_utilization);}
+ else{
+ XBT_DEBUG("mig-stage%d: sent %" PRIu64 " duration %f actual_speed %f (target %f) cpu %f", stage, size, duration, actual_speed, mig_speed, cpu_utilization);
+ }
xbt_free(task_name);
#endif
}
-double get_updated_size(double computed, double dp_rate, double dp_cap)
+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);
+ XBT_DEBUG("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 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)
+ 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 = 1024 * 1024 * 100;
- long remaining = ramsize;
+ // 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) {
- long datasize = chunksize;
+ sg_size_t datasize = chunksize;
if (remaining < chunksize)
datasize = remaining;
double computed = lookup_computed_flop_counts(vm, 1, 0);
computed_total += computed;
- {
- double updated_size = get_updated_size(computed, dp_rate, dp_cap);
+ // {
+ // 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);
- }
+ // double overhead = dpt_cpu_overhead * updated_size;
+ // launch_deferred_exec_process(vm, overhead, 10000);
+ // }
}
return computed_total;
+static double get_threshold_value(double bandwidth, double max_downtime)
+{
+ /* This value assumes the network link is 1Gbps. */
+ // double threshold = max_downtime * 125 * 1024 * 1024;
+ double threshold = max_downtime * bandwidth;
+
+ return threshold;
+}
static int migration_tx_fun(int argc, char *argv[])
{
s_ws_params_t params;
simcall_host_get_params(vm, ¶ms);
- const long ramsize = params.ramsize;
+ const sg_size_t ramsize = params.ramsize;
const long devsize = params.devsize;
const int skip_stage1 = params.skip_stage1;
const int skip_stage2 = params.skip_stage2;
max_downtime = 0.03;
}
- /* This value assumes the network link is 1Gbps. */
- double threshold = max_downtime * 125 * 1024 * 1024;
+ double threshold = 0.00001; /* TODO: cleanup */
/* setting up parameters has done */
// 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 */
+ 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);
remaining_size -= ramsize;
+
+ double clock_post_send = MSG_get_clock();
+ double bandwidth = ramsize / (clock_post_send - clock_prev_send);
+ threshold = get_threshold_value(bandwidth, max_downtime);
+ XBT_INFO("actual banwdidth %f, threshold %f", bandwidth / 1024 / 1024, threshold);
}
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",
+ XBT_INFO("mig-stage 2:%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);
- 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);
- }
+ // if (stage2_round != 0) {
+ // /* during stage1, we have already created overhead tasks */
+ // double overhead = dpt_cpu_overhead * updated_size;
+ // XBT_DEBUG("updated %f overhead %f", updated_size, overhead);
+ // launch_deferred_exec_process(vm, overhead, 10000);
+ // }
{
break;
}
+ 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);
+ double clock_post_send = MSG_get_clock();
+
+ double bandwidth = updated_size / (clock_post_send - clock_prev_send);
+ threshold = get_threshold_value(bandwidth, max_downtime);
+ XBT_INFO("actual banwdidth %f, threshold %f", bandwidth / 1024 / 1024, threshold);
+
+
+
+
+
+
+
remaining_size -= updated_size;
stage2_round += 1;
}
}
-
-
/** @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). But, if a host has
+ * multiple CPU cores, the CPU share of a computation task (or a VM) never
+ * exceeds the capacity of a CPU core.
+ */
+void MSG_vm_set_bound(msg_vm_t vm, double bound)
+{
+ return simcall_vm_set_bound(vm, bound);
+}
+
+
+/** @brief Set the CPU affinity of a given VM.
+ * @ingroup msg_VMs
+ *
+ * This function changes the CPU affinity of a given VM. Usage is the same as
+ * MSG_task_set_affinity(). See the MSG_task_set_affinity() for details.
+ */
+void MSG_vm_set_affinity(msg_vm_t vm, msg_host_t pm, unsigned long mask)
+{
+ msg_host_priv_t priv = msg_host_resource_priv(vm);
+
+ if (mask == 0)
+ xbt_dict_remove_ext(priv->affinity_mask_db, (char *) pm, sizeof(pm));
+ else
+ xbt_dict_set_ext(priv->affinity_mask_db, (char *) pm, sizeof(pm), (void *) mask, NULL);
+
+ msg_host_t pm_now = MSG_vm_get_pm(vm);
+ if (pm_now == pm) {
+ XBT_INFO("set affinity(0x%04lx@%s) for %s", mask, MSG_host_get_name(pm), MSG_host_get_name(vm));
+ simcall_vm_set_affinity(vm, pm, mask);
+ } else
+ XBT_INFO("set affinity(0x%04lx@%s) for %s (not active now)", mask, MSG_host_get_name(pm), MSG_host_get_name(vm));
+}
