diff options
| author |   Felix Fietkau <nbd@openwrt.org> | 2012-03-18 22:58:06 +0100 |
|---|---|---|
| committer |   John W. Linville <linville@tuxdriver.com> | 2012-04-09 16:09:36 -0400 |
| commit | 12d3952fc4a1cd96234bc7023bf7eefeb0bb6355 (patch) | |
| tree | 5c3437e1f996a5c772b286530a3fce547a7d40f2 /net/mac80211/tx.c | |
| parent | mac80211: reduce code duplication in debugfs code (diff) | |
| download | linux-dev-12d3952fc4a1cd96234bc7023bf7eefeb0bb6355.tar.xz linux-dev-12d3952fc4a1cd96234bc7023bf7eefeb0bb6355.zip | |
mac80211: optimize aggregation session timeout handling
Calling mod_timer from the rx/tx hotpath is somewhat expensive, and the
timeout doesn't need to be so precise.
Switch to a different strategy: Schedule the timer initially, store jiffies
of all last rx/tx activity which would previously modify the timer, and
let the timer re-arm itself after checking the last rx/tx timestamp.
Make the session timers deferrable to avoid causing extra wakeups on systems
running on battery.
This visibly reduces CPU load under high network load on small embedded
systems.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/tx.c')
| -rw-r--r-- | net/mac80211/tx.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index a9b27273320e..da2447a7bade 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -1118,8 +1118,7 @@ static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, /* reset session timer */ if (reset_agg_timer && tid_tx->timeout) - mod_timer(&tid_tx->session_timer, - TU_TO_EXP_TIME(tid_tx->timeout)); + tid_tx->last_tx = jiffies; return queued; } |