BPF_F_TIMER_ABS
if (flags & ~(BPF_F_TIMER_ABS | BPF_F_TIMER_CPU_PIN))
if (flags & BPF_F_TIMER_ABS)
BPF_F_TIMER_ABS);
BPF_F_TIMER_ABS);
BPF_F_TIMER_ABS);
flags |= BPF_F_TIMER_ABS;