diff options
| author | Felix Fietkau <nbd@nbd.name> | 2022-06-25 23:24:05 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2022-07-01 10:51:41 +0200 |
| commit | 942741dabcb43236006f557178801ce2051e69f9 (patch) | |
| tree | c6ac91b8b5081264c1fb18343f89bf0b621bc60e /net/mac80211/main.c | |
| parent | 7f884baae68adc85db55b97e3fc903a1f20bd1f9 (diff) | |
wifi: mac80211: switch airtime fairness back to deficit round-robin scheduling
This reverts commits 6a789ba679d652587532cec2a0e0274fda172f3b and
2433647bc8d983a543e7d31b41ca2de1c7e2c198.
The virtual time scheduler code has a number of issues:
- queues slowed down by hardware/firmware powersave handling were not properly
handled.
- on ath10k in push-pull mode, tx queues that the driver tries to pull from
were starved, causing excessive latency
- delay between tx enqueue and reported airtime use were causing excessively
bursty tx behavior
The bursty behavior may also be present on the round-robin scheduler, but there
it is much easier to fix without introducing additional regressions
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Acked-by: Toke Høiland-Jørgensen <toke@toke.dk>
Link: https://lore.kernel.org/r/20220625212411.36675-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/main.c')
| -rw-r--r-- | net/mac80211/main.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 08f153b82a23..e6c1cafbe9e5 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -784,13 +784,10 @@ struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, spin_lock_init(&local->queue_stop_reason_lock); for (i = 0; i < IEEE80211_NUM_ACS; i++) { - struct airtime_sched_info *air_sched = &local->airtime[i]; - - air_sched->active_txqs = RB_ROOT_CACHED; - INIT_LIST_HEAD(&air_sched->active_list); - spin_lock_init(&air_sched->lock); - air_sched->aql_txq_limit_low = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; - air_sched->aql_txq_limit_high = + INIT_LIST_HEAD(&local->active_txqs[i]); + spin_lock_init(&local->active_txq_lock[i]); + local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; + local->aql_txq_limit_high[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; } |