PTS_D_EXP
dst->arg_len = PTS_D_EXP * sizeof(uint64_t);
for (i = 0; i < PTS_D_EXP; i++) {
double d = -log2 ((double)(PTS_D_EXP - i) / PTS_D_EXP) * d_av + d_min;
q->cur_delay = t[my_random24() & (PTS_D_EXP - 1)];