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authorFelix Fietkau <nbd@openwrt.org>2009-10-17 04:56:09 +0000
committerFelix Fietkau <nbd@openwrt.org>2009-10-17 04:56:09 +0000
commitf283279dd868060efc9512f0998794637d6617d2 (patch)
tree20dd8be4f52c5ee19c16b647626cc104d6f5b598 /package/madwifi
parentfdb032fd772da4d6a5a77a166e5f90c631114133 (diff)
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madwifi: remove the 10HZ timer for updating rate control statistics
SVN-Revision: 18053
Diffstat (limited to 'package/madwifi')
-rw-r--r--package/madwifi/patches/452-minstrel_no_timer.patch134
1 files changed, 134 insertions, 0 deletions
diff --git a/package/madwifi/patches/452-minstrel_no_timer.patch b/package/madwifi/patches/452-minstrel_no_timer.patch
new file mode 100644
index 0000000..e7f2dea
--- /dev/null
+++ b/package/madwifi/patches/452-minstrel_no_timer.patch
@@ -0,0 +1,134 @@
+--- a/ath_rate/minstrel/minstrel.c
++++ b/ath_rate/minstrel/minstrel.c
+@@ -119,6 +119,7 @@
+ #include "minstrel.h"
+
+ #define ONE_SECOND (1000 * 1000) /* 1 second, or 1000 milliseconds; eternity, in other words */
++#define TIMER_INTERVAL 100 /* msecs */
+
+ #include "release.h"
+
+@@ -128,9 +129,6 @@ static char *dev_info = "ath_rate_minstr
+ #define STALE_FAILURE_TIMEOUT_MS 10000
+ #define ENABLE_MRR 1
+
+-static int ath_timer_interval = (1000 / 10); /* every 1/10 second, timer runs */
+-static void ath_timer_function(unsigned long data);
+-
+ /* 10% of the time, send a packet at something other than the optimal rate, which fills
+ * the statistics tables nicely. This percentage is applied to the first packet of the
+ * multi rate retry chain. */
+@@ -142,7 +140,7 @@ static void ath_rate_ctl_reset(struct at
+ /* Calculate the throughput and probability of success for each node
+ * we are talking on, based on the statistics collected during the
+ * last timer period. */
+-static void ath_rate_statistics(void *arg, struct ieee80211_node *ni);
++static void ath_rate_statistics(struct ieee80211_node *ni);
+
+
+ #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,52))
+@@ -204,6 +202,11 @@ ath_rate_findrate(struct ath_softc *sc,
+ unsigned int ndx, offset;
+ int mrr;
+
++
++ if (sn->last_update + msecs_to_jiffies(TIMER_INTERVAL) < jiffies) {
++ ath_rate_statistics(&an->an_node);
++ sn->last_update = jiffies;
++ }
+ if (sn->num_rates <= 0) {
+ printk(KERN_WARNING "%s: no rates for " MAC_FMT "?\n",
+ dev_info,
+@@ -640,54 +643,11 @@ ath_rate_newstate(struct ieee80211vap *v
+ }
+ }
+
+-static void
+-ath_timer_function(unsigned long data)
+-{
+- struct minstrel_softc *ssc = (struct minstrel_softc *) data;
+- struct ath_softc *sc = ssc->sc;
+- struct ieee80211com *ic;
+- struct net_device *dev = ssc->sc_dev;
+- struct timer_list *timer;
+- unsigned int interval = ath_timer_interval;
+-
+- if (dev == NULL)
+- DPRINTF(sc, ATH_DEBUG_RATE, "%s: 'dev' is null in this timer \n", __func__);
+-
+- if (sc == NULL)
+- DPRINTF(sc, ATH_DEBUG_RATE, "%s: 'sc' is null in this timer\n", __func__);
+-
+- ic = &sc->sc_ic;
+-
+- if (ssc->close_timer_now)
+- return;
+-
+- if (dev->flags & IFF_RUNNING) {
+- sc->sc_stats.ast_rate_calls++;
+-
+- if (ic->ic_opmode == IEEE80211_M_STA) {
+- struct ieee80211vap *tmpvap;
+- TAILQ_FOREACH(tmpvap, &ic->ic_vaps, iv_next) {
+- ath_rate_statistics(sc, tmpvap->iv_bss);/* NB: no reference */
+- }
+- } else
+- ieee80211_iterate_nodes(&ic->ic_sta, ath_rate_statistics, sc);
+- }
+-
+- if (ic->ic_opmode == IEEE80211_M_STA)
+- interval = ath_timer_interval >> 1;
+-
+- timer = &(ssc->timer);
+- if (timer == NULL)
+- DPRINTF(sc, ATH_DEBUG_RATE, "%s: timer is null - leave it\n", __func__);
+-
+- timer->expires = jiffies + ((HZ * interval) / 1000);
+- add_timer(timer);
+-}
+
+ static void
+-ath_rate_statistics(void *arg, struct ieee80211_node *ni)
++ath_rate_statistics(struct ieee80211_node *ni)
+ {
+- struct ath_node *an = (struct ath_node *) ni;
++ struct ath_node *an = ATH_NODE(ni);
+ struct ieee80211_rateset *rs = &ni->ni_rates;
+ struct minstrel_node *rn = ATH_NODE_MINSTREL(an);
+ unsigned int i;
+@@ -786,15 +746,8 @@ ath_rate_attach(struct ath_softc *sc)
+ osc->arc.arc_space = sizeof(struct minstrel_node);
+ osc->arc.arc_vap_space = 0;
+
+- osc->close_timer_now = 0;
+- init_timer(&osc->timer);
+ osc->sc = sc;
+ osc->sc_dev = sc->sc_dev;
+- osc->timer.function = ath_timer_function;
+- osc->timer.data = (unsigned long)osc;
+-
+- osc->timer.expires = jiffies + HZ;
+- add_timer(&osc->timer);
+
+ return &osc->arc;
+ }
+@@ -803,8 +756,6 @@ static void
+ ath_rate_detach(struct ath_ratectrl *arc)
+ {
+ struct minstrel_softc *osc = (struct minstrel_softc *) arc;
+- osc->close_timer_now = 1;
+- del_timer(&osc->timer);
+ kfree(osc);
+ _MOD_DEC_USE(THIS_MODULE);
+ }
+--- a/ath_rate/minstrel/minstrel.h
++++ b/ath_rate/minstrel/minstrel.h
+@@ -167,6 +167,8 @@ struct minstrel_node {
+ packet, or a packet at an optimal rate.*/
+ int random_n;
+ int a, b; /**Coefficients of the random thing */
++
++ unsigned long last_update;
+ };
+
+