static int
ath_rate_get_static_rix(struct ath_softc *sc, const struct ieee80211_node *ni)
{
#define RATE(_ix) (ni->ni_rates.rs_rates[(_ix)] & IEEE80211_RATE_VAL)
#define DOT11RATE(_ix) (rt->info[(_ix)].dot11Rate & IEEE80211_RATE_VAL)
#define MCS(_ix) (ni->ni_htrates.rs_rates[_ix] | IEEE80211_RATE_MCS)
const struct ieee80211_txparam *tp = ni->ni_txparms;
int srate;
/* Check MCS rates */
for (srate = ni->ni_htrates.rs_nrates - 1; srate >= 0; srate--) {
if (MCS(srate) == tp->ucastrate)
return sc->sc_rixmap[tp->ucastrate];
}
/* Check legacy rates */
for (srate = ni->ni_rates.rs_nrates - 1; srate >= 0; srate--) {
if (RATE(srate) == tp->ucastrate)
return sc->sc_rixmap[tp->ucastrate];
}
return -1;
#undef RATE
#undef DOT11RATE
#undef MCS
}
/*
* Pick a HT rate to begin using.
*
* Don't use any non-HT rates; only consider HT rates.
*/
static int
ath_rate_pick_seed_rate_ht(struct ath_softc *sc, struct ath_node *an,
int frameLen)
{
#define DOT11RATE(ix) (rt->info[ix].dot11Rate & IEEE80211_RATE_VAL)
#define MCS(ix) (rt->info[ix].dot11Rate | IEEE80211_RATE_MCS)
#define RATE(ix) (DOT11RATE(ix) / 2)
int rix = -1, ht_rix = -1;
const HAL_RATE_TABLE *rt = sc->sc_currates;
struct sample_node *sn = ATH_NODE_SAMPLE(an);
const int size_bin = size_to_bin(frameLen);
/* no packet has been sent successfully yet */
for (rix = rt->rateCount-1; rix > 0; rix--) {
/* Skip rates we can't use */
if ((sn->ratemask & (1<<rix)) == 0)
continue;
/* Keep a copy of the last seen HT rate index */
if (rt->info[rix].phy == IEEE80211_T_HT)
ht_rix = rix;
/* Skip non-HT rates */
if (rt->info[rix].phy != IEEE80211_T_HT)
continue;
/*
* Pick a medium-speed rate regardless of stream count
* which has not seen any failures. Higher rates may fail;
* we'll try them later.
*/
if (((MCS(rix) & 0x7) <= 4) &&
sn->stats[size_bin][rix].successive_failures == 0) {
break;
}
}
/*
* If all the MCS rates have successive failures, rix should be
* > 0; otherwise use the lowest MCS rix (hopefully MCS 0.)
*/
return MAX(rix, ht_rix);
#undef RATE
#undef MCS
#undef DOT11RATE
}
void
ath_rate_findrate(struct ath_softc *sc, struct ath_node *an,
int shortPreamble, size_t frameLen,
u_int8_t *rix0, int *try0, u_int8_t *txrate)
{
#define DOT11RATE(ix) (rt->info[ix].dot11Rate & IEEE80211_RATE_VAL)
#define MCS(ix) (rt->info[ix].dot11Rate | IEEE80211_RATE_MCS)
#define RATE(ix) (DOT11RATE(ix) / 2)
struct sample_node *sn = ATH_NODE_SAMPLE(an);
struct sample_softc *ssc = ATH_SOFTC_SAMPLE(sc);
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
const HAL_RATE_TABLE *rt = sc->sc_currates;
const int size_bin = size_to_bin(frameLen);
int rix, mrr, best_rix, change_rates;
unsigned average_tx_time;
ath_rate_update_static_rix(sc, &an->an_node);
if (sn->static_rix != -1) {
rix = sn->static_rix;
*try0 = ATH_TXMAXTRY;
goto done;
}
/* XXX TODO: this doesn't know about 11gn vs 11g protection; teach it */
mrr = sc->sc_mrretry && !(ic->ic_flags & IEEE80211_F_USEPROT);
best_rix = pick_best_rate(an, rt, size_bin, !mrr);
if (best_rix >= 0) {
average_tx_time = sn->stats[size_bin][best_rix].average_tx_time;
} else {
average_tx_time = 0;
}
/*
* Limit the time measuring the performance of other tx
* rates to sample_rate% of the total transmission time.
*/
if (sn->sample_tt[size_bin] < average_tx_time * (sn->packets_since_sample[size_bin]*ssc->sample_rate/100)) {
rix = pick_sample_rate(ssc, an, rt, size_bin);
IEEE80211_NOTE(an->an_node.ni_vap, IEEE80211_MSG_RATECTL,
&an->an_node, "att %d sample_tt %d size %u sample rate %d %s current rate %d %s",
average_tx_time,
sn->sample_tt[size_bin],
bin_to_size(size_bin),
dot11rate(rt, rix),
dot11rate_label(rt, rix),
dot11rate(rt, sn->current_rix[size_bin]),
dot11rate_label(rt, sn->current_rix[size_bin]));
if (rix != sn->current_rix[size_bin]) {
sn->current_sample_rix[size_bin] = rix;
} else {
sn->current_sample_rix[size_bin] = -1;
}
sn->packets_since_sample[size_bin] = 0;
} else {
change_rates = 0;
if (!sn->packets_sent[size_bin] || best_rix == -1) {
/* no packet has been sent successfully yet */
change_rates = 1;
if (an->an_node.ni_flags & IEEE80211_NODE_HT)
best_rix =
ath_rate_pick_seed_rate_ht(sc, an, frameLen);
else
best_rix =
ath_rate_pick_seed_rate_legacy(sc, an, frameLen);
} else if (sn->packets_sent[size_bin] < 20) {
/* let the bit-rate switch quickly during the first few packets */
IEEE80211_NOTE(an->an_node.ni_vap,
IEEE80211_MSG_RATECTL, &an->an_node,
"%s: switching quickly..", __func__);
change_rates = 1;
} else if (ticks - ssc->min_switch > sn->ticks_since_switch[size_bin]) {
/* min_switch seconds have gone by */
IEEE80211_NOTE(an->an_node.ni_vap,
IEEE80211_MSG_RATECTL, &an->an_node,
"%s: min_switch %d > ticks_since_switch %d..",
__func__, ticks - ssc->min_switch, sn->ticks_since_switch[size_bin]);
change_rates = 1;
} else if ((! (an->an_node.ni_flags & IEEE80211_NODE_HT)) &&
(2*average_tx_time < sn->stats[size_bin][sn->current_rix[size_bin]].average_tx_time)) {
/* the current bit-rate is twice as slow as the best one */
IEEE80211_NOTE(an->an_node.ni_vap,
IEEE80211_MSG_RATECTL, &an->an_node,
"%s: 2x att (= %d) < cur_rix att %d",
__func__,
2 * average_tx_time, sn->stats[size_bin][sn->current_rix[size_bin]].average_tx_time);
change_rates = 1;
} else if ((an->an_node.ni_flags & IEEE80211_NODE_HT)) {
int cur_rix = sn->current_rix[size_bin];
int cur_att = sn->stats[size_bin][cur_rix].average_tx_time;
/*
* If the node is HT, upgrade it if the MCS rate is
* higher and the average tx time is within 20% of
* the current rate. It can fail a little.
*
* This is likely not optimal!
*/
#if 0
printf("cur rix/att %x/%d, best rix/att %x/%d\n",
MCS(cur_rix), cur_att, MCS(best_rix), average_tx_time);
#endif
if ((MCS(best_rix) > MCS(cur_rix)) &&
(average_tx_time * 8) <= (cur_att * 10)) {
IEEE80211_NOTE(an->an_node.ni_vap,
IEEE80211_MSG_RATECTL, &an->an_node,
"%s: HT: best_rix 0x%d > cur_rix 0x%x, average_tx_time %d, cur_att %d",
__func__,
MCS(best_rix), MCS(cur_rix), average_tx_time, cur_att);
change_rates = 1;
}
}
sn->packets_since_sample[size_bin]++;
if (change_rates) {
if (best_rix != sn->current_rix[size_bin]) {
IEEE80211_NOTE(an->an_node.ni_vap,
IEEE80211_MSG_RATECTL,
&an->an_node,
"%s: size %d switch rate %d (%d/%d) -> %d (%d/%d) after %d packets mrr %d",
__func__,
bin_to_size(size_bin),
RATE(sn->current_rix[size_bin]),
sn->stats[size_bin][sn->current_rix[size_bin]].average_tx_time,
sn->stats[size_bin][sn->current_rix[size_bin]].perfect_tx_time,
RATE(best_rix),
sn->stats[size_bin][best_rix].average_tx_time,
sn->stats[size_bin][best_rix].perfect_tx_time,
sn->packets_since_switch[size_bin],
mrr);
}
sn->packets_since_switch[size_bin] = 0;
sn->current_rix[size_bin] = best_rix;
sn->ticks_since_switch[size_bin] = ticks;
/*
* Set the visible txrate for this node.
*/
an->an_node.ni_txrate = (rt->info[best_rix].phy == IEEE80211_T_HT) ? MCS(best_rix) : DOT11RATE(best_rix);
}
rix = sn->current_rix[size_bin];
sn->packets_since_switch[size_bin]++;
}
*try0 = mrr ? sn->sched[rix].t0 : ATH_TXMAXTRY;
done:
KASSERT(rix >= 0 && rix < rt->rateCount, ("rix is %d", rix));
*rix0 = rix;
*txrate = rt->info[rix].rateCode
| (shortPreamble ? rt->info[rix].shortPreamble : 0);
sn->packets_sent[size_bin]++;
#undef DOT11RATE
#undef MCS
#undef RATE
}
/*
* Initialize the tables for a node.
*/
static void
ath_rate_ctl_reset(struct ath_softc *sc, struct ieee80211_node *ni)
{
#define RATE(_ix) (ni->ni_rates.rs_rates[(_ix)] & IEEE80211_RATE_VAL)
#define DOT11RATE(_ix) (rt->info[(_ix)].dot11Rate & IEEE80211_RATE_VAL)
#define MCS(_ix) (ni->ni_htrates.rs_rates[_ix] | IEEE80211_RATE_MCS)
struct ath_node *an = ATH_NODE(ni);
struct sample_node *sn = ATH_NODE_SAMPLE(an);
const HAL_RATE_TABLE *rt = sc->sc_currates;
int x, y, rix;
KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode));
KASSERT(sc->sc_curmode < IEEE80211_MODE_MAX+2,
("curmode %u", sc->sc_curmode));
sn->sched = mrr_schedules[sc->sc_curmode];
KASSERT(sn->sched != NULL,
("no mrr schedule for mode %u", sc->sc_curmode));
sn->static_rix = -1;
ath_rate_update_static_rix(sc, ni);
/*
* Construct a bitmask of usable rates. This has all
* negotiated rates minus those marked by the hal as
* to be ignored for doing rate control.
*/
sn->ratemask = 0;
/* MCS rates */
if (ni->ni_flags & IEEE80211_NODE_HT) {
for (x = 0; x < ni->ni_htrates.rs_nrates; x++) {
rix = sc->sc_rixmap[MCS(x)];
if (rix == 0xff)
continue;
/* skip rates marked broken by hal */
if (!rt->info[rix].valid)
continue;
KASSERT(rix < SAMPLE_MAXRATES,
("mcs %u has rix %d", MCS(x), rix));
sn->ratemask |= 1<<rix;
}
}
/* Legacy rates */
for (x = 0; x < ni->ni_rates.rs_nrates; x++) {
rix = sc->sc_rixmap[RATE(x)];
if (rix == 0xff)
continue;
/* skip rates marked broken by hal */
if (!rt->info[rix].valid)
continue;
KASSERT(rix < SAMPLE_MAXRATES,
("rate %u has rix %d", RATE(x), rix));
sn->ratemask |= 1<<rix;
}
#ifdef IEEE80211_DEBUG
if (ieee80211_msg(ni->ni_vap, IEEE80211_MSG_RATECTL)) {
uint32_t mask;
ieee80211_note(ni->ni_vap, "[%6D] %s: size 1600 rate/tt",
ni->ni_macaddr, ":", __func__);
for (mask = sn->ratemask, rix = 0; mask != 0; mask >>= 1, rix++) {
if ((mask & 1) == 0)
continue;
printf(" %d %s/%d", dot11rate(rt, rix), dot11rate_label(rt, rix),
calc_usecs_unicast_packet(sc, 1600, rix, 0,0,
(ni->ni_chw == 40)));
}
printf("\n");
}
void ListMiner::update(list<ListNode*>* L,const int t,const int p,const int sigma,__gnu_cxx::hash_map<ListNode,list<ListNode*>,my_compare>* H){
//1. Gt ← L.begin()
Graph* Gt=L->front()->getGraph();
//2. iterator ← L.begin()
list<ListNode*>::iterator it=L->begin();
//3. iterator.next()
++it;
//4. while iterator ≤ L.end() do
while (it!=L->end()) {
//5. N ← L.iterator()
ListNode* N=*it;
//6. F ← L.iterator().graph()
Graph* F=N->getGraph();
//7. C ← Gt ∩ F
Graph* C=MCS(Gt,F);
//8. if (F ⊂ Gt) then
if(F->isPartOf(*Gt)){
//9. while iterator ≤ L.end() do
while(it!=L->end()){
//10. N ← L.iterator()
N=*it;
//11. N.update_end_index(t)
N->setEnd(t);
//12. N.update_support(support(F)+1)
N->incrementSupport();
bool flag=true;
if ((*N->getGraph())==*((*(--it))->getGraph())) {
flag=false;
it=L->erase(it);
}
++it;
if (flag) {
++it;
}
//++it;
//13. end while
}
//14. else if C = ∅ then
} else if (C->getter()->size()==0){
//15. while iterator ≤ L.end() do
while (it!=L->end()) {
//16. N ← L.iterator()
N=*it;
//17. if (!Subsumed (N.graph(),p) and N.support() ≥ σ ) then
if(!subsumed(N, p,sigma,H) && N->getSupport()>=sigma)
//18. print N
print(N);
//19. endif
//20. delete N
it=L->erase(it);
//21. end while
}
//22. else // case C != ∅ and C!= F
} else {
//23. if (!Subsumed (N.graph(),p) and N.support() ≥ σ ) then
if(!subsumed(N, p,sigma,H) && N->getSupport()>=sigma)
//24. print N
print(N);
//25. endif
//26: N.update_graph(C) //the graph of N is set to C
N->setGraph(*C);
//27: N.update_end_index(t) // the end index of N is set equal to t
N->setEnd(t);
//28: N.update_support(support(N)+1) //the support of N is incremented by one
N->incrementSupport();
//29: if (N.graph() is equal to the graph of the previous node) then
bool flag=true;
if ((*C)==*((*(--it))->getGraph())) {
//30: delete the previous node
flag=false;
it=L->erase(it);
//31. endif
}
//32: iterator.next()
++it;
if (flag) {
++it;
}
//33: endif
}
//34: endif
//35: endfor
}
}