KumiSystems/openwrtv3
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

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.

Browse source 
SVN-Revision: 10921
This commit is contained in:
Felix Fietkau 2008-04-22 23:35:27 +00:00
parent b672976e8e
commit 16767f8db3
1 changed files with 24 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

36
package/madwifi/patches/345-minstrel_sampling.patch
View file

@ -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;