#define PBOXTIME_MIN (30ULL * 1000 * 1000) /* 30ms */
#define PBOXTIME_MAX (300ULL * 1000 * 1000) /* 300ms */
+/*
+ * Target queueing delay is the amount of extra delay that can be added
+ * to accommodate variations in the link bandwidth. The queue should be
+ * large enough to induce this much delay and nothing more than that.
+ */
+#define TARGET_QDELAY_BASE (10ULL * 1000 * 1000) /* 10ms */
+#define TARGET_QDELAY_MIN (10ULL * 1000) /* 10us */
+#define TARGET_QDELAY_MAX (20ULL * 1000 * 1000 * 1000) /* 20s */
+
+/*
+ * Update interval for checking the extra delay added by the queue. This
+ * should be 90-95 percentile of RTT experienced by any TCP connection
+ * so that it will take care of the burst traffic.
+ */
+#define UPDATE_INTERVAL_BASE (100ULL * 1000 * 1000) /* 100ms */
+#define UPDATE_INTERVAL_MIN (100ULL * 1000 * 1000) /* 100ms */
+#define UPDATE_INTERVAL_MAX (10ULL * 1000 * 1000 * 1000) /* 10s */
+
#define SFB_RANDOM(sp, tmin, tmax) ((sfb_random(sp) % (tmax)) + (tmin))
#define SFB_PKT_PBOX 0x1 /* in penalty box */
} \
} while (0)
+/* Minimum nuber of bytes in queue to get flow controlled */
+#define SFB_MIN_FC_THRESHOLD_BYTES 7500
+
+#define SFB_SET_DELAY_HIGH(_sp_, _q_) do { \
+ (_sp_)->sfb_flags |= SFBF_DELAYHIGH; \
+ (_sp_)->sfb_fc_threshold = max(SFB_MIN_FC_THRESHOLD_BYTES, \
+ (qsize((_q_)) >> 3)); \
+} while (0)
+
+#define SFB_QUEUE_DELAYBASED(_sp_) ((_sp_)->sfb_flags & SFBF_DELAYBASED)
+#define SFB_IS_DELAYHIGH(_sp_) ((_sp_)->sfb_flags & SFBF_DELAYHIGH)
+#define SFB_QUEUE_DELAYBASED_MAXSIZE 2048 /* max pkts */
+
#define HINTERVAL_MIN (10) /* 10 seconds */
#define HINTERVAL_MAX (20) /* 20 seconds */
#define SFB_HINTERVAL(sp) ((sfb_random(sp) % HINTERVAL_MAX) + HINTERVAL_MIN)
static void sfb_calc_holdtime(struct sfb *, u_int64_t);
static void sfb_calc_pboxtime(struct sfb *, u_int64_t);
static void sfb_calc_hinterval(struct sfb *, u_int64_t *);
+static void sfb_calc_target_qdelay(struct sfb *, u_int64_t);
+static void sfb_calc_update_interval(struct sfb *, u_int64_t);
static void sfb_swap_bins(struct sfb *, u_int32_t);
static inline int sfb_pcheck(struct sfb *, struct pkthdr *);
static int sfb_penalize(struct sfb *, struct pkthdr *, struct timespec *);
static void sfb_increment_bin(struct sfb *, struct sfbbinstats *,
struct timespec *, struct timespec *);
static inline void sfb_dq_update_bins(struct sfb *, struct pkthdr *,
- struct timespec *);
+ struct timespec *, u_int32_t qsize);
static inline void sfb_eq_update_bins(struct sfb *, struct pkthdr *);
static int sfb_drop_early(struct sfb *, struct pkthdr *, u_int16_t *,
struct timespec *);
static boolean_t sfb_bin_addfcentry(struct sfb *, struct pkthdr *);
static void sfb_fclist_append(struct sfb *, struct sfb_fcl *);
static void sfb_fclists_clean(struct sfb *sp);
+static int sfb_bin_mark_or_drop(struct sfb *sp, struct sfbbinstats *bin);
+static void sfb_detect_dequeue_stall(struct sfb *sp, class_queue_t *,
+ struct timespec *);
SYSCTL_NODE(_net_classq, OID_AUTO, sfb, CTLFLAG_RW|CTLFLAG_LOCKED, 0, "SFB");
SYSCTL_QUAD(_net_classq_sfb, OID_AUTO, hinterval, CTLFLAG_RW|CTLFLAG_LOCKED,
&sfb_hinterval, "SFB hash interval in nanoseconds");
+static u_int64_t sfb_target_qdelay;
+SYSCTL_QUAD(_net_classq_sfb, OID_AUTO, target_qdelay, CTLFLAG_RW|CTLFLAG_LOCKED,
+ &sfb_target_qdelay, "SFB target queue delay in milliseconds");
+
+static u_int64_t sfb_update_interval;
+SYSCTL_QUAD(_net_classq_sfb, OID_AUTO, update_interval,
+ CTLFLAG_RW|CTLFLAG_LOCKED, &sfb_update_interval, "SFB update interval");
+
static u_int32_t sfb_increment = SFB_INCREMENT;
SYSCTL_UINT(_net_classq_sfb, OID_AUTO, increment, CTLFLAG_RW|CTLFLAG_LOCKED,
&sfb_increment, SFB_INCREMENT, "SFB increment [d1]");
SYSCTL_UINT(_net_classq_sfb, OID_AUTO, ratelimit, CTLFLAG_RW|CTLFLAG_LOCKED,
&sfb_ratelimit, 0, "SFB rate limit");
-#define MBPS (1ULL * 1000 * 1000)
-#define GBPS (MBPS * 1000)
+#define KBPS (1ULL * 1000) /* 1 Kbits per second */
+#define MBPS (1ULL * 1000 * 1000) /* 1 Mbits per second */
+#define GBPS (MBPS * 1000) /* 1 Gbits per second */
struct sfb_time_tbl {
u_int64_t speed; /* uplink speed */
net_timeradd(&now, &sp->sfb_hinterval, &sp->sfb_nextreset);
}
+static void
+sfb_calc_target_qdelay(struct sfb *sp, u_int64_t out_bw)
+{
+#pragma unused(out_bw)
+ u_int64_t target_qdelay = 0;
+ struct ifnet *ifp = sp->sfb_ifp;
+
+ target_qdelay = IFCQ_TARGET_QDELAY(&ifp->if_snd);
+
+ if (sfb_target_qdelay != 0)
+ target_qdelay = sfb_target_qdelay;
+
+ /*
+ * If we do not know the effective bandwidth, use the default
+ * target queue delay.
+ */
+ if (target_qdelay == 0)
+ target_qdelay = IFQ_TARGET_DELAY;
+
+ sp->sfb_target_qdelay = target_qdelay;
+}
+
+static void
+sfb_calc_update_interval(struct sfb *sp, u_int64_t out_bw)
+{
+#pragma unused(out_bw)
+ u_int64_t update_interval = 0;
+
+ /* If the system-level override is set, use it */
+ if (sfb_update_interval != 0)
+ update_interval = sfb_update_interval;
+ /*
+ * If we do not know the effective bandwidth, use the default
+ * update interval.
+ */
+ if (update_interval == 0)
+ update_interval = IFQ_UPDATE_INTERVAL;
+
+ net_nsectimer(&update_interval, &sp->sfb_update_interval);
+}
+
/*
* sfb support routines
*/
sfb_calc_holdtime(sp, eff_rate);
sfb_calc_pboxtime(sp, eff_rate);
sfb_calc_hinterval(sp, NULL);
+ sfb_calc_target_qdelay(sp, eff_rate);
+ sfb_calc_update_interval(sp, eff_rate);
if (ev == CLASSQ_EV_LINK_DOWN ||
ev == CLASSQ_EV_LINK_UP)
log(LOG_DEBUG, "%s: SFB qid=%d, holdtime=%llu nsec, "
"pboxtime=%llu nsec, allocation=%d, drop_thresh=%d, "
- "hinterval=%d sec, sfb_bins=%d bytes, eff_rate=%llu bps\n",
+ "hinterval=%d sec, sfb_bins=%d bytes, eff_rate=%llu bps"
+ "target_qdelay= %llu nsec "
+ "update_interval=%llu sec %llu nsec flags=0x%x\n",
if_name(ifp), sp->sfb_qid, (u_int64_t)sp->sfb_holdtime.tv_nsec,
(u_int64_t)sp->sfb_pboxtime.tv_nsec,
(u_int32_t)sp->sfb_allocation, (u_int32_t)sp->sfb_drop_thresh,
(int)sp->sfb_hinterval.tv_sec, (int)sizeof (*sp->sfb_bins),
- eff_rate);
+ eff_rate, (u_int64_t)sp->sfb_target_qdelay,
+ (u_int64_t)sp->sfb_update_interval.tv_sec,
+ (u_int64_t)sp->sfb_update_interval.tv_nsec, sp->sfb_flags);
}
void
sps->dropthresh = sp->sfb_drop_thresh;
sps->clearpkts = sp->sfb_clearpkts;
sps->current = sp->sfb_current;
+ sps->target_qdelay = sp->sfb_target_qdelay;
+ sps->min_estdelay = sp->sfb_min_qdelay;
+ sps->delay_fcthreshold = sp->sfb_fc_threshold;
+ sps->flags = sp->sfb_flags;
net_timernsec(&sp->sfb_holdtime, &sp->sfb_stats.hold_time);
net_timernsec(&sp->sfb_pboxtime, &sp->sfb_stats.pbox_time);
net_timernsec(&sp->sfb_hinterval, &sp->sfb_stats.rehash_intval);
+ net_timernsec(&sp->sfb_update_interval, &sps->update_interval);
*(&(sps->sfbstats)) = *(&(sp->sfb_stats));
_CASSERT(sizeof ((*sp->sfb_bins)[0].stats) ==
wbin = SFB_BINST(sp, j, i, s ^ 1); /* warm-up */
cbin->pkts = 0;
+ cbin->bytes = 0;
if (cbin->pmark > SFB_MAX_PMARK)
cbin->pmark = SFB_MAX_PMARK;
if (cbin->pmark < 0)
}
static inline void
-sfb_dq_update_bins(struct sfb *sp, struct pkthdr *pkt, struct timespec *now)
+sfb_dq_update_bins(struct sfb *sp, struct pkthdr *pkt,
+ struct timespec *now, u_int32_t qsize)
{
#if SFB_LEVELS != 2 || SFB_FC_LEVEL != 0
int i;
n = SFB_BINMASK(pkt->pkt_sfb_hash8[(s << 1)]);
bin = SFB_BINST(sp, 0, n, s);
- VERIFY(bin->pkts > 0);
- if (--bin->pkts == 0) {
+ VERIFY(bin->pkts > 0 && bin->bytes >= (u_int32_t)pkt->len);
+ bin->pkts--;
+ bin->bytes -= pkt->len;
+
+ if (bin->pkts == 0)
sfb_decrement_bin(sp, bin, SFB_BINFT(sp, 0, n, s), now);
+
+ /* Deliver flow control feedback to the sockets */
+ if (SFB_QUEUE_DELAYBASED(sp)) {
+ if (!(SFB_IS_DELAYHIGH(sp)) ||
+ bin->bytes <= sp->sfb_fc_threshold ||
+ bin->pkts == 0 || qsize == 0)
+ fcl = SFB_FC_LIST(sp, n);
+ } else if (bin->pkts <= (sp->sfb_allocation >> 2)) {
+ fcl = SFB_FC_LIST(sp, n);
}
- if (bin->pkts <= (sp->sfb_allocation >> 2)) {
- /* deliver flow control feedback to the sockets */
- fcl = SFB_FC_LIST(sp, n);
- if (!STAILQ_EMPTY(&fcl->fclist))
- sfb_fclist_append(sp, fcl);
- }
+
+ if (fcl != NULL && !STAILQ_EMPTY(&fcl->fclist))
+ sfb_fclist_append(sp, fcl);
+ fcl = NULL;
/* Level 1: bin index at [1] for set 0; [3] for set 1 */
n = SFB_BINMASK(pkt->pkt_sfb_hash8[(s << 1) + 1]);
bin = SFB_BINST(sp, 1, n, s);
- VERIFY(bin->pkts > 0);
- if (--bin->pkts == 0)
+ VERIFY(bin->pkts > 0 && bin->bytes >= (u_int64_t)pkt->len);
+ bin->pkts--;
+ bin->bytes -= pkt->len;
+ if (bin->pkts == 0)
sfb_decrement_bin(sp, bin, SFB_BINFT(sp, 1, n, s), now);
#else /* SFB_LEVELS != 2 || SFB_FC_LEVEL != 0 */
for (i = 0; i < SFB_LEVELS; i++) {
bin = SFB_BINST(sp, i, n, s);
- VERIFY(bin->pkts > 0);
- if (--bin->pkts == 0) {
+ VERIFY(bin->pkts > 0 && bin->bytes >= pkt->len);
+ bin->pkts--;
+ bin->bytes -= pkt->len;
+ if (bin->pkts == 0)
sfb_decrement_bin(sp, bin,
SFB_BINFT(sp, i, n, s), now);
- }
- if (bin->pkts <= (sp->sfb_allocation >> 2)) {
- /* deliver flow control feedback to the sockets */
- if (i == SFB_FC_LEVEL) {
+ if (i != SFB_FC_LEVEL)
+ continue;
+ if (SFB_QUEUE_DELAYBASED(sp)) {
+ if (!(SFB_IS_DELAYHIGH(sp)) ||
+ bin->bytes <= sp->sfb_fc_threshold)
fcl = SFB_FC_LIST(sp, n);
- if (!STAILQ_EMPTY(&fcl->fclist))
- sfb_fclist_append(sp, fcl);
- }
+ } else if (bin->pkts <= (sp->sfb_allocation >> 2)) {
+ fcl = SFB_FC_LIST(sp, n);
}
+ if (fcl != NULL && !STAILQ_EMPTY(&fcl->fclist))
+ sfb_fclist_append(sp, fcl);
+ fcl = NULL;
}
#endif /* SFB_LEVELS != 2 || SFB_FC_LEVEL != 0 */
}
int i, n;
#endif /* SFB_LEVELS != 2 */
int s;
-
+ struct sfbbinstats *bin;
s = sp->sfb_current;
VERIFY((s + (s ^ 1)) == 1);
*/
#if SFB_LEVELS == 2
/* Level 0: bin index at [0] for set 0; [2] for set 1 */
- SFB_BINST(sp, 0,
- SFB_BINMASK(pkt->pkt_sfb_hash8[(s << 1)]), s)->pkts++;
+ bin = SFB_BINST(sp, 0,
+ SFB_BINMASK(pkt->pkt_sfb_hash8[(s << 1)]), s);
+ bin->pkts++;
+ bin->bytes += pkt->len;
/* Level 1: bin index at [1] for set 0; [3] for set 1 */
- SFB_BINST(sp, 1,
- SFB_BINMASK(pkt->pkt_sfb_hash8[(s << 1) + 1]), s)->pkts++;
+ bin = SFB_BINST(sp, 1,
+ SFB_BINMASK(pkt->pkt_sfb_hash8[(s << 1) + 1]), s);
+ bin->pkts++;
+ bin->bytes += pkt->len;
+
#else /* SFB_LEVELS != 2 */
for (i = 0; i < SFB_LEVELS; i++) {
if (s == 0) /* set 0, bin index [0,1] */
else /* set 1, bin index [2,3] */
n = SFB_BINMASK(pkt->pkt_sfb_hash8[i + 2]);
- SFB_BINST(sp, i, n, s)->pkts++;
+ bin = SFB_BINST(sp, i, n, s);
+ bin->pkts++;
+ bin->bytes += pkt->len;
}
#endif /* SFB_LEVELS != 2 */
}
return (fce != NULL);
}
+/*
+ * check if this flow needs to be flow-controlled or if this
+ * packet needs to be dropped.
+ */
+static int
+sfb_bin_mark_or_drop(struct sfb *sp, struct sfbbinstats *bin)
+{
+ int ret = 0;
+ if (SFB_QUEUE_DELAYBASED(sp)) {
+ /*
+ * Mark or drop if this bin has more
+ * bytes than the flowcontrol threshold.
+ */
+ if (SFB_IS_DELAYHIGH(sp) &&
+ bin->bytes >= (sp->sfb_fc_threshold << 1))
+ ret = 1;
+ } else {
+ if (bin->pkts >= sp->sfb_allocation &&
+ bin->pkts >= sp->sfb_drop_thresh)
+ ret = 1; /* drop or mark */
+ }
+ return (ret);
+}
+
/*
* early-drop probability is kept in pmark of each bin of the flow
*/
if (*pmin > (u_int16_t)bin->pmark)
*pmin = (u_int16_t)bin->pmark;
- if (bin->pkts >= sp->sfb_allocation) {
- if (bin->pkts >= sp->sfb_drop_thresh)
- ret = 1; /* drop or mark */
+
+ /* Update SFB probability */
+ if (bin->pkts >= sp->sfb_allocation)
sfb_increment_bin(sp, bin, SFB_BINFT(sp, 0, n, s), now);
- }
+
+ ret = sfb_bin_mark_or_drop(sp, bin);
/* Level 1: bin index at [1] for set 0; [3] for set 1 */
n = SFB_BINMASK(pkt->pkt_sfb_hash8[(s << 1) + 1]);
if (*pmin > (u_int16_t)bin->pmark)
*pmin = (u_int16_t)bin->pmark;
- if (bin->pkts >= sp->sfb_allocation) {
- if (bin->pkts >= sp->sfb_drop_thresh)
- ret = 1; /* drop or mark */
+ if (bin->pkts >= sp->sfb_allocation)
sfb_increment_bin(sp, bin, SFB_BINFT(sp, 1, n, s), now);
- }
#else /* SFB_LEVELS != 2 */
for (i = 0; i < SFB_LEVELS; i++) {
if (s == 0) /* set 0, bin index [0,1] */
if (*pmin > (u_int16_t)bin->pmark)
*pmin = (u_int16_t)bin->pmark;
- if (bin->pkts >= sp->sfb_allocation) {
- if (bin->pkts >= sp->sfb_drop_thresh)
- ret = 1; /* drop or mark */
+ if (bin->pkts >= sp->sfb_allocation)
sfb_increment_bin(sp, bin,
SFB_BINFT(sp, i, n, s), now);
- }
+ if (i == SFB_FC_LEVEL)
+ ret = sfb_bin_mark_or_drop(sp, bin);
}
#endif /* SFB_LEVELS != 2 */
return (ret);
}
+void
+sfb_detect_dequeue_stall(struct sfb *sp, class_queue_t *q,
+ struct timespec *now)
+{
+ struct timespec max_getqtime;
+
+ if (!SFB_QUEUE_DELAYBASED(sp) || SFB_IS_DELAYHIGH(sp) ||
+ qsize(q) <= SFB_MIN_FC_THRESHOLD_BYTES ||
+ !net_timerisset(&sp->sfb_getqtime))
+ return;
+
+ net_timeradd(&sp->sfb_getqtime, &sp->sfb_update_interval,
+ &max_getqtime);
+ if (net_timercmp(now, &max_getqtime, >)) {
+ /*
+ * No packets have been dequeued in an update interval
+ * worth of time. It means that the queue is stalled
+ */
+ SFB_SET_DELAY_HIGH(sp, q);
+ sp->sfb_stats.dequeue_stall++;
+ }
+}
+
#define DTYPE_NODROP 0 /* no drop */
#define DTYPE_FORCED 1 /* a "forced" drop */
#define DTYPE_EARLY 2 /* an "unforced" (early) drop */
s = sp->sfb_current;
VERIFY((s + (s ^ 1)) == 1);
+ /* See comments in <rdar://problem/14040693> */
+ VERIFY(!(pkt->pkt_flags & PKTF_PRIV_GUARDED));
+ pkt->pkt_flags |= PKTF_PRIV_GUARDED;
+
/* time to swap the bins? */
if (net_timercmp(&now, &sp->sfb_nextreset, >=)) {
net_timeradd(&now, &sp->sfb_hinterval, &sp->sfb_nextreset);
VERIFY((s + (s ^ 1)) == 1);
}
+ if (!net_timerisset(&sp->sfb_update_time)) {
+ net_timeradd(&now, &sp->sfb_update_interval,
+ &sp->sfb_update_time);
+ }
+
pkt->pkt_sfb_flags = 0;
pkt->pkt_sfb_hash16[s] =
(SFB_HASH(&pkt->pkt_flowid, sizeof (pkt->pkt_flowid),
(SFB_HASH(&pkt->pkt_flowid, sizeof (pkt->pkt_flowid),
(*sp->sfb_bins)[s ^ 1].fudge) & SFB_HASHMASK);
+ /* check if the queue has been stalled */
+ sfb_detect_dequeue_stall(sp, q, &now);
+
/* see if we drop early */
droptype = DTYPE_NODROP;
if (sfb_drop_early(sp, pkt, &pmin, &now)) {
sp->sfb_stats.drop_pbox++;
}
- /* if the queue length hits the hard limit, it's a forced drop */
- if (droptype == DTYPE_NODROP && qlen(q) >= qlimit(q)) {
+ /*
+ * if max queue size is static, make it a forced drop
+ * when the queue length hits the queue limit
+ */
+ if (!(SFB_QUEUE_DELAYBASED(sp)) &&
+ droptype == DTYPE_NODROP && qlen(q) >= qlimit(q)) {
+ droptype = DTYPE_FORCED;
+ sp->sfb_stats.drop_queue++;
+ }
+
+ /*
+ * delay based queues have a larger maximum size to
+ * allow for bursts
+ */
+ if (SFB_QUEUE_DELAYBASED(sp) &&
+ droptype == DTYPE_NODROP &&
+ qlen(q) >= SFB_QUEUE_DELAYBASED_MAXSIZE) {
droptype = DTYPE_FORCED;
sp->sfb_stats.drop_queue++;
}
ret = CLASSQEQ_DROPPED_FC;
}
}
-
/* if successful enqueue this packet, else drop it */
if (droptype == DTYPE_NODROP) {
+ net_timernsec(&now, &pkt->pkt_enqueue_ts);
_addq(q, m);
} else {
IFCQ_CONVERT_LOCK(&sp->sfb_ifp->if_snd);
VERIFY(m->m_flags & M_PKTHDR);
pkt = &m->m_pkthdr;
+ VERIFY(pkt->pkt_flags & PKTF_PRIV_GUARDED);
if (!purge) {
/* calculate EWMA of dequeues */
if (net_timerisset(&sp->sfb_getqtime)) {
struct timespec delta;
u_int64_t avg, new;
-
net_timersub(&now, &sp->sfb_getqtime, &delta);
net_timernsec(&delta, &new);
avg = sp->sfb_stats.dequeue_avg;
/*
* If the time since last dequeue is
* significantly greater than the current
- * average, weight the average more against
+ * average, weigh the average more against
* the old value.
*/
if (DEQUEUE_SPIKE(new, avg))
*(&sp->sfb_getqtime) = *(&now);
}
+ if (!purge && SFB_QUEUE_DELAYBASED(sp)) {
+ u_int64_t dequeue_ns, queue_delay = 0;
+ net_timernsec(&now, &dequeue_ns);
+ if (dequeue_ns > pkt->pkt_enqueue_ts)
+ queue_delay = dequeue_ns - pkt->pkt_enqueue_ts;
+
+ if (sp->sfb_min_qdelay == 0 ||
+ (queue_delay > 0 && queue_delay < sp->sfb_min_qdelay))
+ sp->sfb_min_qdelay = queue_delay;
+ if (net_timercmp(&now, &sp->sfb_update_time, >=)) {
+ if (sp->sfb_min_qdelay > sp->sfb_target_qdelay) {
+ if (!SFB_IS_DELAYHIGH(sp))
+ SFB_SET_DELAY_HIGH(sp, q);
+ } else {
+ sp->sfb_flags &= ~(SFBF_DELAYHIGH);
+ sp->sfb_fc_threshold = 0;
+
+ }
+ net_timeradd(&now, &sp->sfb_update_interval,
+ &sp->sfb_update_time);
+ sp->sfb_min_qdelay = 0;
+ }
+ }
+
/*
* Clearpkts are the ones which were in the queue when the hash
* function was perturbed. Since the perturbation value (fudge),
} else if (sp->sfb_clearpkts > 0) {
sp->sfb_clearpkts--;
} else {
- sfb_dq_update_bins(sp, pkt, &now);
+ sfb_dq_update_bins(sp, pkt, &now, qsize(q));
+ }
+
+ /* See comments in <rdar://problem/14040693> */
+ pkt->pkt_flags &= ~PKTF_PRIV_GUARDED;
+
+ /*
+ * If the queue becomes empty before the update interval, reset
+ * the flow control threshold
+ */
+ if (qsize(q) == 0) {
+ sp->sfb_flags &= ~SFBF_DELAYHIGH;
+ sp->sfb_min_qdelay = 0;
+ sp->sfb_fc_threshold = 0;
+ net_timerclear(&sp->sfb_update_time);
}
return (m);
}
sfb_calc_holdtime(sp, eff_rate);
sfb_calc_pboxtime(sp, eff_rate);
+ sfb_calc_target_qdelay(sp, eff_rate);
+ sfb_calc_update_interval(sp, eff_rate);
break;
}
projects / apple / xnu.git / blobdiff