if (thread_count_ == 1) {
model_action_ = get_host()->get_cpu()->execution_start(flops_amounts_.front(), bound_);
model_action_->set_sharing_penalty(sharing_penalty_);
if (thread_count_ == 1) {
model_action_ = get_host()->get_cpu()->execution_start(flops_amounts_.front(), bound_);
model_action_->set_sharing_penalty(sharing_penalty_);