psi_group_change
psi_group_change(group, cpu, 0, 0, now, true);
psi_group_change(group, cpu, clear, set, now, true);
psi_group_change(group, cpu, 0, TSK_ONCPU, now, true);
psi_group_change(group, cpu, clear, set, now, wake_clock);
psi_group_change(group, cpu, clear, set, now, wake_clock);