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authorFelix Fietkau <nbd@openwrt.org>2008-04-22 23:35:27 +0000
committerFelix Fietkau <nbd@openwrt.org>2008-04-22 23:35:27 +0000
commitc78311b598b0ee2a627082800e70ede89e3b6e70 (patch)
tree4f8c27504ebbb35dcf35d8eb6369b306f5fecd37 /package
parent6e4bdf784bce0fa7ce88c11dabbe64e6340d64b7 (diff)
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madwifi: put an upper limit on the amount of sampling that minstrel should do when
the link changes its status from very good to slightly bad. the previous version of the patch could have resulted in erratic rate control behavior when there was a lot of sampling backlog. git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10921 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package')
-rw-r--r--package/madwifi/patches/345-minstrel_sampling.patch36
1 files changed, 24 insertions, 12 deletions
diff --git a/package/madwifi/patches/345-minstrel_sampling.patch b/package/madwifi/patches/345-minstrel_sampling.patch
index ea4c25f3ad..3be5a8fee3 100644
--- a/package/madwifi/patches/345-minstrel_sampling.patch
+++ b/package/madwifi/patches/345-minstrel_sampling.patch
@@ -1,7 +1,7 @@
Index: madwifi-trunk-r3314/ath/if_ath.c
===================================================================
---- madwifi-trunk-r3314.orig/ath/if_ath.c 2008-04-21 02:44:23.000000000 +0200
-+++ madwifi-trunk-r3314/ath/if_ath.c 2008-04-21 03:33:02.000000000 +0200
+--- madwifi-trunk-r3314.orig/ath/if_ath.c 2008-04-21 09:13:19.000000000 +0200
++++ madwifi-trunk-r3314/ath/if_ath.c 2008-04-23 01:15:49.000000000 +0200
@@ -8095,6 +8095,7 @@
ath_hal_setupxtxdesc(sc->sc_ah, ds, mrr.rate1, mrr.retries1,
mrr.rate2, mrr.retries2,
@@ -12,8 +12,8 @@ Index: madwifi-trunk-r3314/ath/if_ath.c
#ifndef ATH_SUPERG_FF
Index: madwifi-trunk-r3314/ath/if_athvar.h
===================================================================
---- madwifi-trunk-r3314.orig/ath/if_athvar.h 2008-04-21 00:50:13.000000000 +0200
-+++ madwifi-trunk-r3314/ath/if_athvar.h 2008-04-21 03:31:48.000000000 +0200
+--- madwifi-trunk-r3314.orig/ath/if_athvar.h 2008-04-21 09:13:19.000000000 +0200
++++ madwifi-trunk-r3314/ath/if_athvar.h 2008-04-23 01:15:49.000000000 +0200
@@ -446,6 +446,7 @@
u_int16_t bf_flags; /* tx descriptor flags */
u_int64_t bf_tsf;
@@ -24,18 +24,30 @@ Index: madwifi-trunk-r3314/ath/if_athvar.h
* multiple segments.
Index: madwifi-trunk-r3314/ath_rate/minstrel/minstrel.c
===================================================================
---- madwifi-trunk-r3314.orig/ath_rate/minstrel/minstrel.c 2008-04-21 02:50:31.000000000 +0200
-+++ madwifi-trunk-r3314/ath_rate/minstrel/minstrel.c 2008-04-21 04:08:36.000000000 +0200
-@@ -336,7 +336,7 @@
+--- madwifi-trunk-r3314.orig/ath_rate/minstrel/minstrel.c 2008-04-21 09:13:19.000000000 +0200
++++ madwifi-trunk-r3314/ath_rate/minstrel/minstrel.c 2008-04-23 01:15:50.000000000 +0200
+@@ -333,15 +333,19 @@
+ if (sn->static_rate_ndx >= 0) {
+ ndx = sn->static_rate_ndx;
+ } else {
++ int delta;
sn->packet_count++;
sn->random_n = (sn->a * sn->random_n) + sn->b;
offset = sn->random_n & 0xf;
- if ((((100 * sn->sample_count) / (sn->sample_count + sn->packet_count)) < ath_lookaround_rate) && (offset < 2)) {
-+ if ((((100 * sn->sample_count) / (sn->packet_count ?: 1)) < ath_lookaround_rate) && (offset < 2)) {
++ delta = (sn->packet_count * ath_lookaround_rate / 100) - sn->sample_count;
++ if ((delta > 0) && (offset < 2)) {
sn->sample_count++;
sn->is_sampling = 1;
if (sn->packet_count >= 10000) {
-@@ -398,11 +398,14 @@
+ sn->sample_count = 0;
+ sn->packet_count = 0;
++ } else if (delta > sn->num_rates * 2) {
++ sn->sample_count += ((delta - sn->num_rates * 2) * ath_lookaround_rate) / 100;
+ }
+
+ /* Don't look for slowest rate (i.e. slowest
+@@ -398,11 +402,14 @@
if (sn->num_rates <= 0)
return;
@@ -52,7 +64,7 @@ Index: madwifi-trunk-r3314/ath_rate/minstrel/minstrel.c
rc1 = sn->max_tp_rate;
} else {
rc1 = sn->max_tp_rate2;
-@@ -525,6 +528,9 @@
+@@ -525,6 +532,9 @@
if (tries <= tries1)
return;
@@ -64,8 +76,8 @@ Index: madwifi-trunk-r3314/ath_rate/minstrel/minstrel.c
tries = tries - tries1;
Index: madwifi-trunk-r3314/net80211/ieee80211_rate.h
===================================================================
---- madwifi-trunk-r3314.orig/net80211/ieee80211_rate.h 2008-01-31 03:29:42.000000000 +0100
-+++ madwifi-trunk-r3314/net80211/ieee80211_rate.h 2008-04-21 03:30:25.000000000 +0200
+--- madwifi-trunk-r3314.orig/net80211/ieee80211_rate.h 2008-04-21 09:11:19.000000000 +0200
++++ madwifi-trunk-r3314/net80211/ieee80211_rate.h 2008-04-21 09:13:19.000000000 +0200
@@ -87,6 +87,7 @@
int retries2;
int rate3;