if (not 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 = sg_vm_lookup_computed_flops(vm_);
- updated_size = get_updated_size(computed, dp_rate, dp_cap);
- }
+ /* just after stage1, nothing has been updated. But, we have to send the data updated during stage1 */
+ sg_size_t updated_size = get_updated_size(computed_during_stage1, dp_rate, dp_cap);
+ remaining_size += updated_size;
+ XBT_DEBUG("mig-stage2.%d: remaining_size %zu (%s threshold %zu)", stage2_round, remaining_size,
+ (remaining_size < threshold) ? "<" : ">", threshold);
+
+ /* When the remaining size is below the threshold value, move to stage 3. */
+ while (threshold < remaining_size) {
XBT_DEBUG("mig-stage 2:%d updated_size %llu computed_during_stage1 %f dp_rate %f dp_cap %llu", 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 %zu (%s threshold %zu)", stage2_round, remaining_size,
- (remaining_size < threshold) ? "<" : ">", threshold);
- if (remaining_size < threshold)
- break;
-
sg_size_t sent = 0;
clock_prev_send = s4u::Engine::get_clock();
try {
sg_vm_stop_dirty_page_tracking(vm_);
return;
}
+
+ remaining_size -= sent;
+ double computed = sg_vm_lookup_computed_flops(vm_);
+
clock_post_send = s4u::Engine::get_clock();
if (sent == updated_size) {
- /* timeout did not happen */
bandwidth = updated_size / (clock_post_send - clock_prev_send);
threshold = bandwidth * max_downtime;
XBT_DEBUG("actual bandwidth %f, threshold %zu", 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) {
+ XBT_DEBUG("mig-stage2.%d: remaining_size %zu (%s threshold %zu)", stage2_round, remaining_size,
+ (remaining_size < threshold) ? "<" : ">", threshold);
+ updated_size = get_updated_size(computed, dp_rate, dp_cap);
+ remaining_size += updated_size;
+ } else {
/* 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 = sg_vm_lookup_computed_flops(vm_);
updated_size = get_updated_size(computed, dp_rate, dp_cap);
remaining_size += updated_size;
break;
- } else
- XBT_CRITICAL("bug");
+ }
}
}