diff options
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/ntpd.c | 88 |
1 files changed, 36 insertions, 52 deletions
diff --git a/networking/ntpd.c b/networking/ntpd.c index 62543ad2f..ede993078 100644 --- a/networking/ntpd.c +++ b/networking/ntpd.c @@ -461,12 +461,7 @@ struct globals { #define G_precision_sec 0.002 uint8_t stratum; -#define STATE_NSET 0 /* initial state, "nothing is set" */ -//#define STATE_FSET 1 /* frequency set from file */ -//#define STATE_SPIK 2 /* spike detected */ -//#define STATE_FREQ 3 /* initial frequency */ -#define STATE_SYNC 4 /* clock synchronized (normal operation) */ - uint8_t discipline_state; // doc calls it c.state + //uint8_t discipline_state; // doc calls it c.state uint8_t poll_exp; // s.poll int polladj_count; // c.count int FREQHOLD_cnt; @@ -1453,15 +1448,14 @@ select_and_cluster(void) * Local clock discipline and its helpers */ static void -set_new_values(int disc_state, double offset, double recv_time) +set_new_values(double offset, double recv_time) { /* Enter new state and set state variables. Note we use the time * of the last clock filter sample, which must be earlier than * the current time. */ - VERB4 bb_error_msg("disc_state=%d last update offset=%f recv_time=%f", - disc_state, offset, recv_time); - G.discipline_state = disc_state; + VERB4 bb_error_msg("last update offset=%f recv_time=%f", + offset, recv_time); G.last_update_offset = offset; G.last_update_recv_time = recv_time; } @@ -1550,9 +1544,16 @@ update_local_clock(peer_t *p) recv_time += offset; abs_offset = offset = 0; - set_new_values(STATE_SYNC, offset, recv_time); + set_new_values(offset, recv_time); } else { /* abs_offset <= STEP_THRESHOLD */ + if (option_mask32 & OPT_q) { + /* We were only asked to set time once. + * The clock is precise enough, no need to step. + */ + exit(0); + } + /* The ratio is calculated before jitter is updated to make * poll adjust code more sensitive to large offsets. */ @@ -1567,46 +1568,31 @@ update_local_clock(peer_t *p) if (G.discipline_jitter < G_precision_sec) G.discipline_jitter = G_precision_sec; - switch (G.discipline_state) { - case STATE_NSET: - if (option_mask32 & OPT_q) { - /* We were only asked to set time once. - * The clock is precise enough, no need to step. - */ - exit(0); - } - set_new_values(STATE_SYNC, offset, recv_time); - VERB4 bb_simple_error_msg("transitioning to FREQ, datapoint ignored"); - return 0; /* "leave poll interval as is" */ - - default: #if !USING_KERNEL_PLL_LOOP - /* Compute freq_drift due to PLL and FLL contributions. - * - * The FLL and PLL frequency gain constants - * depend on the poll interval and Allan - * intercept. The FLL is not used below one-half - * the Allan intercept. Above that the loop gain - * increases in steps to 1 / AVG. - */ - if ((1 << G.poll_exp) > ALLAN / 2) { - etemp = FLL - G.poll_exp; - if (etemp < AVG) - etemp = AVG; - freq_drift += (offset - G.last_update_offset) / (MAXD(since_last_update, ALLAN) * etemp); - } - /* For the PLL the integration interval - * (numerator) is the minimum of the update - * interval and poll interval. This allows - * oversampling, but not undersampling. - */ - etemp = MIND(since_last_update, (1 << G.poll_exp)); - dtemp = (4 * PLL) << G.poll_exp; - freq_drift += offset * etemp / SQUARE(dtemp); -#endif - set_new_values(STATE_SYNC, offset, recv_time); - break; + /* Compute freq_drift due to PLL and FLL contributions. + * + * The FLL and PLL frequency gain constants + * depend on the poll interval and Allan + * intercept. The FLL is not used below one-half + * the Allan intercept. Above that the loop gain + * increases in steps to 1 / AVG. + */ + if ((1 << G.poll_exp) > ALLAN / 2) { + etemp = FLL - G.poll_exp; + if (etemp < AVG) + etemp = AVG; + freq_drift += (offset - G.last_update_offset) / (MAXD(since_last_update, ALLAN) * etemp); } + /* For the PLL the integration interval + * (numerator) is the minimum of the update + * interval and poll interval. This allows + * oversampling, but not undersampling. + */ + etemp = MIND(since_last_update, (1 << G.poll_exp)); + dtemp = (4 * PLL) << G.poll_exp; + freq_drift += offset * etemp / SQUARE(dtemp); +#endif + set_new_values(offset, recv_time); if (G.stratum != p->lastpkt_stratum + 1) { G.stratum = p->lastpkt_stratum + 1; run_script("stratum", offset); @@ -1625,9 +1611,7 @@ update_local_clock(peer_t *p) G.rootdisp = p->lastpkt_rootdisp + dtemp; VERB4 bb_error_msg("updating leap/refid/reftime/rootdisp from peer %s", p->p_dotted); - /* We are in STATE_SYNC now, but did not do adjtimex yet. - * (Any other state does not reach this, they all return earlier) - * By this time, freq_drift and offset are set + /* By this time, freq_drift and offset are set * to values suitable for adjtimex. */ #if !USING_KERNEL_PLL_LOOP |