BPF_T_MICROTIME
BPF_T_FORMAT(d->bd_tstamp) == BPF_T_MICROTIME)
case BPF_T_MICROTIME:
if (tstype == BPF_T_NONE || BPF_T_FORMAT(tstype) == BPF_T_MICROTIME) {
#define BPF_T_MICROTIME_FAST (BPF_T_MICROTIME | BPF_T_FAST)
#define BPF_T_MICROTIME_MONOTONIC (BPF_T_MICROTIME | BPF_T_MONOTONIC)
#define BPF_T_MICROTIME_MONOTONIC_FAST (BPF_T_MICROTIME | BPF_T_MONOTONIC_FAST)