[RFC PATCH v4 3/3] mac80211: add busy time factor into expected throughput

Baligh Gasmi
2022-06-01T11:31:53Z

When estimating the expected throughput, take into account the busy time
of the current channel.

Signed-off-by: Baligh Gasmi <gasmibal@gmail.com>
---
net/mac80211/sta_info.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 201aab465234..9f977cf13dd5 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -2000,6 +2000,8 @@ void ieee80211_sta_update_tp(struct ieee80211_local *local,
bool ack, int retry)
{
unsigned long diff;
+ struct ieee80211_sub_if_data *sdata;
+ u32 avg_busy;
struct rate_control_ref *ref = NULL;

if (!skb || !sta || !tx_time_est)
@@ -2014,6 +2016,7 @@ void ieee80211_sta_update_tp(struct ieee80211_local *local,
if (local->ops->get_expected_throughput)
return;

+ sdata = sta->sdata;
tx_time_est += ack ? 4 : 0;
tx_time_est += retry ? retry * 2 : 2;

@@ -2022,6 +2025,10 @@ void ieee80211_sta_update_tp(struct ieee80211_local *local,

diff = jiffies - sta->deflink.status_stats.last_tp_update;
if (diff > HZ / 10) {
+ avg_busy = ewma_avg_busy_read(&sdata->avg_busy) >> 1;
+ sta->deflink.tx_stats.tp_tx_time_est +=
+ (sta->deflin.tx_stats.tp_tx_time_est * avg_busy) / 100;
+
ewma_avg_est_tp_add(&sta->deflink.status_stats.avg_est_tp,
sta->deflink.tx_stats.tp_tx_size /
sta->deflink.tx_stats.tp_tx_time_est);
--
2.36.1