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;
s_ws_params_t params;
simcall_host_get_params(ms->vm, ¶ms);
- const double xfer_cpu_overhead = params.xfer_cpu_overhead;
int need_exit = 0;
msg_task_t task = NULL;
ret = MSG_task_recv(&task, ms->mbox);
{
- double received ;
- if (ret == MSG_OK)
- received = MSG_task_get_data_size(task);
- else{
- // An error occured, clean the code and return
+ if (ret != MSG_OK) {
+ // An error occured, 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;
+ return 0;
}
- /* TODO: clean up */
- // const double alpha = 0.22L * 1.0E8 / (80L * 1024 * 1024);
- launch_deferred_exec_process(ms->vm, received * xfer_cpu_overhead, 1);
}
if (strcmp(task->name, finalize_task_name) == 0)
}
-static int deferred_exec_fun(int argc, char *argv[])
-{
- 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", computation);
-
- /* dpt is the results of the VM activity */
- MSG_task_set_priority(task, prio);
- MSG_task_execute(task);
-
-
-
- MSG_task_destroy(task);
-
- return 0;
-}
-
-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 = 4;
- char **argv = xbt_new(char *, nargvs);
- argv[0] = pr_name;
- argv[1] = bprintf("%f", computation);
- argv[2] = bprintf("%f", prio);
- argv[3] = NULL;
-
- MSG_process_create_with_arguments(pr_name, deferred_exec_fun, NULL, host, nargvs - 1, argv);
-}
-
-
-static int task_tx_overhead_fun(int argc, char *argv[])
-{
- xbt_assert(argc == 2);
- const char *mbox = argv[1];
-
- int need_exit = 0;
-
- // XBT_INFO("start %s", mbox);
-
- for (;;) {
- msg_task_t task = NULL;
- MSG_task_recv(&task, mbox);
-
- // XBT_INFO("task->name %s", task->name);
-
- if (strcmp(task->name, "finalize_making_overhead") == 0)
- need_exit = 1;
-
- // XBT_INFO("exec");
- // MSG_task_set_priority(task, 1000000);
- MSG_task_execute(task);
- MSG_task_destroy(task);
-
- if (need_exit)
- break;
- }
-
- // XBT_INFO("bye");
-
- return 0;
-}
-
-static void start_overhead_process(msg_task_t comm_task)
-{
- char *pr_name = bprintf("__pr_task_tx_overhead_%s", MSG_task_get_name(comm_task));
- char *mbox = bprintf("__mb_task_tx_overhead_%s", MSG_task_get_name(comm_task));
-
- int nargvs = 3;
- char **argv = xbt_new(char *, nargvs);
- argv[0] = pr_name;
- argv[1] = mbox;
- argv[2] = NULL;
-
- // 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);
-}
-
-static void shutdown_overhead_process(msg_task_t comm_task)
-{
- char *mbox = bprintf("__mb_task_tx_overhead_%s", MSG_task_get_name(comm_task));
-
- msg_task_t task = MSG_task_create("finalize_making_overhead", 0, 0, NULL);
-
- // XBT_INFO("micro shutdown: mbox %s", mbox);
- msg_error_t ret = MSG_task_send(task, mbox);
- if(ret != MSG_OK)
- xbt_die("shutdown error - task not sent");
-
- xbt_free(mbox);
- // XBT_INFO("shutdown done");
-}
-
-static void request_overhead(msg_task_t comm_task, double computation)
-{
- char *mbox = bprintf("__mb_task_tx_overhead_%s", MSG_task_get_name(comm_task));
-
- msg_task_t task = MSG_task_create("micro", computation, 0, NULL);
-
- // XBT_INFO("req overhead");
- msg_error_t ret = MSG_task_send(task, mbox);
- if(ret != MSG_OK)
- xbt_die("req overhead error - task not sent");
-
- xbt_free(mbox);
-}
-
-/* alpha is (floating_operations / bytes).
- *
- * When actual migration traffic was 32 mbytes/s, we observed the CPU
- * utilization of the main thread of the Qemu process was 10 %.
- * alpha = 0.1 * C / (32 * 1024 * 1024)
- * where the CPU capacity of the PM is C flops/s.
- *
- * */
-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 * 10;
- double remaining = MSG_task_get_data_size(comm_task);
-
- start_overhead_process(comm_task);
-
-
- while (remaining > 0) {
- double data_size = chunk_size;
- if (remaining < chunk_size)
- data_size = remaining;
-
- remaining -= data_size;
-
- // XBT_INFO("remaining %f bytes", remaining);
-
-
- double clock_sta = MSG_get_clock();
-
- /* create a micro task */
- {
- char *mtask_name = bprintf("__micro_%s", MSG_task_get_name(comm_task));
- msg_task_t mtask = MSG_task_create(mtask_name, 0, data_size, NULL);
-
- request_overhead(comm_task, data_size * alpha);
-
- msg_error_t ret = MSG_task_send(mtask, mbox);
- if(ret != MSG_OK)
- xbt_die("migration error - task not sent");
-
- xbt_free(mtask_name);
- }
-
-#if 0
- {
- /* In the real world, sending data involves small CPU computation. */
- char *mtask_name = bprintf("__micro_%s", MSG_task_get_name(comm_task));
- msg_task_t mtask = MSG_task_create(mtask_name, data_size * alpha, data_size, NULL);
- MSG_task_execute(mtask);
- MSG_task_destroy(mtask);
- xbt_free(mtask_name);
- }
-#endif
-
- /* TODO */
-
- double clock_end = MSG_get_clock();
-
-
- if (mig_speed > 0) {
- /*
- * (max bandwidth) > data_size / ((elapsed time) + time_to_sleep)
- *
- * Thus, we get
- * time_to_sleep > data_size / (max bandwidth) - (elapsed time)
- *
- * If time_to_sleep is smaller than zero, the elapsed time was too big. We
- * do not need a micro sleep.
- **/
- double time_to_sleep = data_size / mig_speed - (clock_end - clock_sta);
- if (time_to_sleep > 0)
- 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("%s", MSG_task_get_name(comm_task));
- shutdown_overhead_process(comm_task);
-
-}
-
-
-#if 0
-static void make_cpu_overhead_of_data_transfer(msg_task_t comm_task, double init_comm_size)
-{
- double prev_remaining = init_comm_size;
-
- for (;;) {
- double remaining = MSG_task_get_remaining_communication(comm_task);
- if (remaining == 0)
- need_exit = 1;
-
- double sent = prev_remaining - remaining;
- double comp_size = sent * overhead;
-
-
- char *comp_task_name = bprintf("__sender_overhead%s", MSG_task_get_name(comm_task));
- msg_task_t comp_task = MSG_task_create(comp_task_name, comp_size, 0, NULL);
- MSG_task_execute(comp_task);
- MSG_task_destroy(comp_task);
-
- if (need_exit)
- break;
-
- prev_remaining = remaining;
-
- }
-
- xbt_free(comp_task_name);
-}
-#endif
-
-// #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(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)
+ sg_size_t size, char *mbox, int stage, int stage2_round, double mig_speed)
{
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);
double clock_sta = MSG_get_clock();
-#ifdef USE_MICRO_TASK
-
- task_send_bounded_with_cpu_overhead(task, mbox, mig_speed, xfer_cpu_overhead);
-
-#else
msg_error_t ret;
if (mig_speed > 0)
ret = MSG_task_send_bounded(task, mbox, mig_speed);
}
//else
// XBT_INFO("Ret != FAILURE !!!!");
-#endif
double clock_end = MSG_get_clock();
double duration = clock_end - clock_sta;
double actual_speed = size / duration;
-#ifdef USE_MICRO_TASK
- double cpu_utilization = size * xfer_cpu_overhead / duration / 1.0E8;
-#else
double cpu_utilization = 0;
-#endif
if (stage == 2){
XBT_DEBUG("mig-stage%d.%d: sent %llu duration %f actual_speed %f (target %f) cpu %f", stage, stage2_round, size, duration, actual_speed, mig_speed, cpu_utilization);}
}
-#ifdef USE_MICRO_TASK
- /* The name of a micro task starts with __micro, which does not match the
- * special name that finalizes the receiver loop. Thus, we send the special task.
- **/
- {
- if (stage == 3) {
- 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, 0, NULL);
- msg_error_t ret = MSG_task_send(task, mbox);
-// xbt_assert(ret == MSG_OK);
- xbt_free(task_name);
- if(ret == MSG_HOST_FAILURE){
- //XBT_INFO("SRC host failed during migration of %s (stage 3)", sg_host_name(vm));
- MSG_task_destroy(task);
- THROWF(host_error, 0, "SRC host failed during migration of VM %s (stage 3)", sg_host_name(vm));
- // The owner of the task did not change so destroy the task
- return;
- }else if(ret == MSG_TRANSFER_FAILURE){
- //XBT_INFO("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_name(vm), stage);
- return;
- }
-
- }
- }
-#endif
}
}
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)
+ sg_size_t ramsize, double mig_speed, double dp_rate, double dp_cap)
{
// const long chunksize = (sg_size_t)1024 * 1024 * 100;
datasize = remaining;
remaining -= datasize;
- send_migration_data(ms->vm, ms->src_pm, ms->dst_pm, datasize, ms->mbox, 1, 0, mig_speed, xfer_cpu_overhead);
+ send_migration_data(ms->vm, ms->src_pm, ms->dst_pm, datasize, ms->mbox, 1, 0, mig_speed);
double computed = lookup_computed_flop_counts(ms->vm, 1, 0);
computed_total += computed;
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;
msg_vm_t vm=ms->vm;
double clock_prev_send = MSG_get_clock();
TRY{
- computed_during_stage1 = send_stage1(ms, ramsize, mig_speed, xfer_cpu_overhead, dp_rate, dp_cap, dpt_cpu_overhead);
+ computed_during_stage1 = send_stage1(ms, ramsize, mig_speed, dp_rate, dp_cap);
} CATCH_ANONYMOUS{
//hostfailure (if you want to know whether this is the SRC or the DST please check directly in send_migration_data code)
// Stop the dirty page tracking an return (there is no memory space to release)
double clock_prev_send = MSG_get_clock();
TRY{
- send_migration_data(ms->vm, ms->src_pm, ms->dst_pm, updated_size, ms->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);
}CATCH_ANONYMOUS{
//hostfailure (if you want to know whether this is the SRC or the DST please 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(vm);
TRY{
- send_migration_data(ms->vm, ms->src_pm, ms->dst_pm, remaining_size, ms->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);
}CATCH_ANONYMOUS{
//hostfailure (if you want to know whether this is the SRC or the DST please check directly in send_migration_data code)
// Stop the dirty page tracking an return (there is no memory space to release)
