Convert and correct time stamps early.
Convert time stamps to tmv_t and apply all corrections before passing them to clock/port functions to reduce the number of parameters. Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>master
parent
09e5e6e934
commit
6813fd7c3d
56
clock.c
56
clock.c
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@ -106,8 +106,6 @@ struct clock {
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struct freq_estimator fest;
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struct time_status_np status;
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double nrr;
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tmv_t c1;
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tmv_t c2;
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tmv_t t1;
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tmv_t t2;
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struct clock_description desc;
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@ -549,16 +547,9 @@ static enum servo_state clock_no_adjust(struct clock *c)
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{
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double fui;
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double ratio, freq;
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tmv_t origin2;
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struct freq_estimator *f = &c->fest;
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enum servo_state state = SERVO_UNLOCKED;
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/*
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* We have clock.t1 as the origin time stamp, and clock.t2 as
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* the ingress. According to the master's clock, the time at
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* which the sync arrived is:
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*
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* origin = origin_ts + path_delay + correction
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*
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* The ratio of the local clock freqency to the master clock
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* is estimated by:
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*
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@ -571,7 +562,7 @@ static enum servo_state clock_no_adjust(struct clock *c)
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*/
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if (!f->ingress1) {
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f->ingress1 = c->t2;
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f->origin1 = tmv_add(c->t1, tmv_add(c->c1, c->c2));
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f->origin1 = c->t1;
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return state;
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}
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f->count++;
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@ -582,12 +573,8 @@ static enum servo_state clock_no_adjust(struct clock *c)
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pr_warning("bad timestamps in rate ratio calculation");
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return state;
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}
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/*
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* origin2 = c->t1 (+c->path_delay) + c->c1 + c->c2;
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*/
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origin2 = tmv_add(c->t1, tmv_add(c->c1, c->c2));
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ratio = tmv_dbl(tmv_sub(origin2, f->origin1)) /
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ratio = tmv_dbl(tmv_sub(c->t1, f->origin1)) /
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tmv_dbl(tmv_sub(c->t2, f->ingress1));
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freq = (1.0 - ratio) * 1e9;
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@ -611,7 +598,7 @@ static enum servo_state clock_no_adjust(struct clock *c)
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pr_debug("diff %+.9f", ratio - (fui + c->nrr - 1.0));
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f->ingress1 = c->t2;
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f->origin1 = origin2;
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f->origin1 = c->t1;
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f->count = 0;
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return state;
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@ -1289,27 +1276,22 @@ int clock_poll(struct clock *c)
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return 0;
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}
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void clock_path_delay(struct clock *c, struct timespec req, struct timestamp rx,
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Integer64 correction)
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void clock_path_delay(struct clock *c, tmv_t req, tmv_t rx)
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{
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tmv_t c1, c2, c3, pd, t1, t2, t3, t4;
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tmv_t pd, t1, t2, t3, t4;
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double rr;
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if (tmv_is_zero(c->t1))
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return;
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c1 = c->c1;
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c2 = c->c2;
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c3 = correction_to_tmv(correction);
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t1 = c->t1;
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t2 = c->t2;
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t3 = timespec_to_tmv(req);
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t4 = timestamp_to_tmv(rx);
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t3 = req;
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t4 = rx;
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rr = clock_rate_ratio(c);
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/*
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* c->path_delay = (t2 - t3) * rr + (t4 - t1);
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* c->path_delay -= c_sync + c_fup + c_delay_resp;
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* c->path_delay /= 2.0;
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*/
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@ -1317,18 +1299,14 @@ void clock_path_delay(struct clock *c, struct timespec req, struct timestamp rx,
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if (rr != 1.0)
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pd = dbl_tmv(tmv_dbl(pd) * rr);
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pd = tmv_add(pd, tmv_sub(t4, t1));
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pd = tmv_sub(pd, tmv_add(c1, tmv_add(c2, c3)));
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pd = tmv_div(pd, 2);
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if (pd < 0) {
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pr_debug("negative path delay %10" PRId64, pd);
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pr_debug("path_delay = (t2 - t3) * rr + (t4 - t1) - (c1 + c2 + c3)");
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pr_debug("path_delay = (t2 - t3) * rr + (t4 - t1)");
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pr_debug("t2 - t3 = %+10" PRId64, t2 - t3);
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pr_debug("t4 - t1 = %+10" PRId64, t4 - t1);
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pr_debug("rr = %.9f", rr);
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pr_debug("c1 %10" PRId64, c1);
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pr_debug("c2 %10" PRId64, c2);
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pr_debug("c3 %10" PRId64, c3);
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}
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c->path_delay = filter_sample(c->delay_filter, pd);
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@ -1395,30 +1373,18 @@ int clock_switch_phc(struct clock *c, int phc_index)
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return 0;
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}
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enum servo_state clock_synchronize(struct clock *c,
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struct timespec ingress_ts,
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struct timestamp origin_ts,
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Integer64 correction1,
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Integer64 correction2)
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enum servo_state clock_synchronize(struct clock *c, tmv_t ingress, tmv_t origin)
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{
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double adj;
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tmv_t ingress, origin;
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enum servo_state state = SERVO_UNLOCKED;
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ingress = timespec_to_tmv(ingress_ts);
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origin = timestamp_to_tmv(origin_ts);
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c->t1 = origin;
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c->t2 = ingress;
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c->c1 = correction_to_tmv(correction1);
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c->c2 = correction_to_tmv(correction2);
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/*
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* c->master_offset = ingress - origin - c->path_delay - c->c1 - c->c2;
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* c->master_offset = ingress - origin - c->path_delay;
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*/
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c->master_offset = tmv_sub(ingress,
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tmv_add(origin, tmv_add(c->path_delay, tmv_add(c->c1, c->c2))));
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c->master_offset = tmv_sub(ingress, tmv_add(origin, c->path_delay));
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if (!c->path_delay)
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return state;
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19
clock.h
19
clock.h
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@ -169,11 +169,10 @@ struct PortIdentity clock_parent_identity(struct clock *c);
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* @param c The clock instance.
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* @param req The transmission time of the delay request message.
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* @param rx The reception time of the delay request message,
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* as reported in the delay response message.
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* @param correction The correction field from the delay response message.
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* as reported in the delay response message, including
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* correction.
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*/
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void clock_path_delay(struct clock *c, struct timespec req, struct timestamp rx,
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Integer64 correction);
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void clock_path_delay(struct clock *c, tmv_t req, tmv_t rx);
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/**
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* Provide the estimated peer delay from a slave port.
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@ -215,18 +214,16 @@ int clock_switch_phc(struct clock *c, int phc_index);
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/**
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* Provide a data point to synchronize the clock.
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* @param c The clock instance to synchronize.
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* @param ingress_ts The ingress time stamp on the sync message.
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* @param origin_ts The reported transmission time of the sync message.
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* @param ingress The ingress time stamp on the sync message.
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* @param origin The reported transmission time of the sync message,
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including any corrections.
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* @param correction1 The correction field of the sync message.
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* @param correction2 The correction field of the follow up message.
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* Pass zero in the case of one step operation.
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* @return The state of the clock's servo.
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*/
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enum servo_state clock_synchronize(struct clock *c,
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struct timespec ingress_ts,
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struct timestamp origin_ts,
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Integer64 correction1,
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Integer64 correction2);
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enum servo_state clock_synchronize(struct clock *c, tmv_t ingress,
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tmv_t origin);
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/**
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* Inform a slaved clock about the master's sync interval.
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46
port.c
46
port.c
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@ -887,9 +887,8 @@ static int port_management_set(struct port *target,
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return respond ? 1 : 0;
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}
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static void port_nrate_calculate(struct port *p, tmv_t t3, tmv_t t4, tmv_t c)
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static void port_nrate_calculate(struct port *p, tmv_t origin, tmv_t ingress)
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{
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tmv_t origin2;
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struct nrate_estimator *n = &p->nrate;
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/*
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@ -899,24 +898,23 @@ static void port_nrate_calculate(struct port *p, tmv_t t3, tmv_t t4, tmv_t c)
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p->pdr_missing = 0;
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if (!n->ingress1) {
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n->ingress1 = t4;
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n->origin1 = tmv_add(t3, c);
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n->ingress1 = ingress;
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n->origin1 = origin;
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return;
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}
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n->count++;
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if (n->count < n->max_count) {
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return;
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}
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origin2 = tmv_add(t3, c);
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if (tmv_eq(t4, n->ingress1)) {
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if (tmv_eq(ingress, n->ingress1)) {
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pr_warning("bad timestamps in nrate calculation");
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return;
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}
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n->ratio =
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tmv_dbl(tmv_sub(origin2, n->origin1)) /
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tmv_dbl(tmv_sub(t4, n->ingress1));
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n->ingress1 = t4;
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n->origin1 = origin2;
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tmv_dbl(tmv_sub(origin, n->origin1)) /
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tmv_dbl(tmv_sub(ingress, n->ingress1));
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n->ingress1 = ingress;
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n->origin1 = origin;
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n->count = 0;
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n->ratio_valid = 1;
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}
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@ -1012,11 +1010,17 @@ static void port_synchronize(struct port *p,
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Integer64 correction1, Integer64 correction2)
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{
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enum servo_state state;
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tmv_t t1, t1c, t2, c1, c2;
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port_set_sync_rx_tmo(p);
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state = clock_synchronize(p->clock, ingress_ts, origin_ts,
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correction1, correction2);
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t1 = timestamp_to_tmv(origin_ts);
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t2 = timespec_to_tmv(ingress_ts);
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c1 = correction_to_tmv(correction1);
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c2 = correction_to_tmv(correction2);
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t1c = tmv_add(t1, tmv_add(c1, c2));
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state = clock_synchronize(p->clock, t2, t1c);
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switch (state) {
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case SERVO_UNLOCKED:
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port_dispatch(p, EV_SYNCHRONIZATION_FAULT, 0);
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@ -1623,6 +1627,7 @@ static void process_delay_resp(struct port *p, struct ptp_message *m)
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struct delay_req_msg *req;
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struct delay_resp_msg *rsp = &m->delay_resp;
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struct PortIdentity master;
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tmv_t c3, t3, t4, t4c;
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if (!p->delay_req)
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return;
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@ -1639,8 +1644,12 @@ static void process_delay_resp(struct port *p, struct ptp_message *m)
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if (!pid_eq(&master, &m->header.sourcePortIdentity))
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return;
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clock_path_delay(p->clock, p->delay_req->hwts.ts, m->ts.pdu,
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m->header.correction);
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c3 = correction_to_tmv(m->header.correction);
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t3 = timespec_to_tmv(p->delay_req->hwts.ts);
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t4 = timestamp_to_tmv(m->ts.pdu);
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t4c = tmv_sub(t4, c3);
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clock_path_delay(p->clock, t3, t4c);
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if (p->logMinDelayReqInterval != rsp->hdr.logMessageInterval) {
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// TODO - validate the input.
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@ -1789,7 +1798,7 @@ out:
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static void port_peer_delay(struct port *p)
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{
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tmv_t c1, c2, t1, t2, t3, t4, pd;
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tmv_t c1, c2, t1, t2, t3, t3c, t4, pd;
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struct ptp_message *req = p->peer_delay_req;
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struct ptp_message *rsp = p->peer_delay_resp;
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struct ptp_message *fup = p->peer_delay_fup;
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@ -1837,11 +1846,10 @@ static void port_peer_delay(struct port *p)
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t3 = timestamp_to_tmv(fup->ts.pdu);
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c2 = correction_to_tmv(fup->header.correction);
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calc:
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t3c = tmv_add(t3, tmv_add(c1, c2));
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adj_t41 = p->nrate.ratio * clock_rate_ratio(p->clock) *
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tmv_dbl(tmv_sub(t4, t1));
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pd = tmv_sub(dbl_tmv(adj_t41), tmv_sub(t3, t2));
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pd = tmv_sub(pd, c1);
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pd = tmv_sub(pd, c2);
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pd = tmv_sub(dbl_tmv(adj_t41), tmv_sub(t3c, t2));
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pd = tmv_div(pd, 2);
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p->peer_delay = filter_sample(p->delay_filter, pd);
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@ -1851,7 +1859,7 @@ calc:
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pr_debug("pdelay %hu %10" PRId64 "%10" PRId64, portnum(p), p->peer_delay, pd);
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if (p->pod.follow_up_info)
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port_nrate_calculate(p, t3, t4, tmv_add(c1, c2));
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port_nrate_calculate(p, t3c, t4);
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if (p->state == PS_UNCALIBRATED || p->state == PS_SLAVE) {
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clock_peer_delay(p->clock, p->peer_delay, p->nrate.ratio);
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