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| author |   Michal Kazior <michal.kazior@tieto.com> | 2016-05-19 10:37:48 +0200 |
|---|---|---|
| committer |   Johannes Berg <johannes.berg@intel.com> | 2016-06-09 11:31:27 +0200 |
| commit | 80a83cfc434b1e3afe38974570b460db4898bec6 (patch) | |
| tree | f2774b8d416c3341ec57312fe39c6633d380be70 /include/net | |
| parent | nl80211: clarify nl80211_set_reg() success path (diff) | |
| download | linux-dev-80a83cfc434b1e3afe38974570b460db4898bec6.tar.xz linux-dev-80a83cfc434b1e3afe38974570b460db4898bec6.zip | |
mac80211: skip netdev queue control with software queuing
Qdiscs are designed with no regard to 802.11
aggregation requirements and hand out
packet-by-packet with no guarantee they are
destined to the same tid. This does more bad than
good no matter how fairly a given qdisc may behave
on an ethernet interface.
Software queuing used per-AC netdev subqueue
congestion control whenever a global AC limit was
hit. This meant in practice a single station or
tid queue could starve others rather easily. This
could resonate with qdiscs in a bad way or could
just end up with poor aggregation performance.
Increasing the AC limit would increase induced
latency which is also bad.
Disabling qdiscs by default and performing
taildrop instead of netdev subqueue congestion
control on the other hand makes it possible for
tid queues to fill up "in the meantime" while
preventing stations starving each other.
This increases aggregation opportunities and
should allow software queuing based drivers
achieve better performance by utilizing airtime
more efficiently with big aggregates.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/mac80211.h | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h index be30b0549b88..a8683aec6dbe 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -2147,9 +2147,6 @@ enum ieee80211_hw_flags { * @n_cipher_schemes: a size of an array of cipher schemes definitions. * @cipher_schemes: a pointer to an array of cipher scheme definitions * supported by HW. - * - * @txq_ac_max_pending: maximum number of frames per AC pending in all txq - * entries for a vif. */ struct ieee80211_hw { struct ieee80211_conf conf; @@ -2180,7 +2177,6 @@ struct ieee80211_hw { u8 uapsd_max_sp_len; u8 n_cipher_schemes; const struct ieee80211_cipher_scheme *cipher_schemes; - int txq_ac_max_pending; }; static inline bool _ieee80211_hw_check(struct ieee80211_hw *hw, |