[Make-wifi-fast] [PATCH v8 0/2] Implement Airtime-based Queue Limit (AQL)

[Dave Taht]

On Thu, Nov 14, 2019 at 6:04 PM Kan Yan <kyan at google.com> wrote:
>
> I have tested it with Toke's patch "[PATCH v6 4/4] mac80211: Use
> Airtime-based Queue Limits (AQL) on packet dequeue", but didn't
> include it here, as it is self contained and Toke has plan to update
> it.
>
> The platform (QCA9984) used in my test

I do keep hoping for pretty pictures. Got any? :-P

>  doesn't support 802.11ax, so I
> was not able to test the HE mode support added in v7 update of "Import
> airtime calculation code from mt76" from Toke.

Is there an ax QCAXXXX platform, m.2 card, or mini-pci card worth
testing at this point?

How are they handling mu-mimo?

I have a round of tests scheduled for intel's ax200 chips, soon. Not sure
what, if any, of this new work might apply.

> On Thu, Nov 14, 2019 at 5:48 PM Kan Yan <kyan at google.com> wrote:
> >
> > This patch series port the Airtime Queue Limits concept from the out-of-tree
> > ath10k implementation[0] to mac80211. This version takes my patch to do the
> > throttling in mac80211, and replaces the driver API with the mechanism from
> > Toke's series, which instead calculated the expected airtime at dequeue time
> > inside mac80211, storing it in the SKB cb field.
> >
> > This version has been tested on QCA9984 platform.
> >
> > [0] https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/1703105/7
> >
> > Changelog:
> >
> > v8:
> >   - Includes Toke's v7 version of "mac80211: Import airtime calculation code from mt76"
> >   - Don't clobber sta's customized queue limit when configuring the default via debugfs
> >   - Fix a racing condition when reset aql_tx_pending.
> >
> > v7:
> >   - Fix aql_total_pending_airtime underflow due to insufficient locking.
> >
> > v6:
> >   - Fix sta lookup in ieee80211_report_used_skb().
> >   - Move call to ieee80211_sta_update_pending_airtime() to a bit later in
> >     __ieee80211_tx_status()
> > v5:
> >   - Add missing export of ieee80211_calc_rx_airtime() and make
> >     ieee80211_calc_tx_airtime_rate() static (kbuildbot).
> >   - Use skb_get_queue_mapping() to get the AC from the skb.
> >   - Take basic rate configuration for the BSS into account when calculating
> >     multicast rate.
> > v4:
> >   - Fix calculation that clamps the maximum airtime to fit into 10 bits
> >   - Incorporate Rich Brown's nits for the commit message in Kan's patch
> >   - Add fewer local variables to ieee80211_tx_dequeue()
> > v3:
> >   - Move the tx_time_est field so it's shared with ack_frame_id, and use units
> >     of 4us for the value stored in it.
> >   - Move the addition of the Ethernet header size into ieee80211_calc_expected_tx_airtime()
> > v2:
> >   - Integrate Kan's approach to airtime throttling.
> >   - Hopefully fix the cb struct alignment on big-endian architectures.
> >
> >
> >
> > Kan Yan (1):
> >   mac80211: Implement Airtime-based Queue Limit (AQL)
> >
> > Toke Høiland-Jørgensen (1):
> >   mac80211: Import airtime calculation code from mt76
> >
> >  include/net/cfg80211.h     |   7 +
> >  include/net/mac80211.h     |  41 +++
> >  net/mac80211/Makefile      |   3 +-
> >  net/mac80211/airtime.c     | 597 +++++++++++++++++++++++++++++++++++++
> >  net/mac80211/debugfs.c     |  85 ++++++
> >  net/mac80211/debugfs_sta.c |  43 ++-
> >  net/mac80211/ieee80211_i.h |   8 +
> >  net/mac80211/main.c        |  10 +-
> >  net/mac80211/sta_info.c    |  38 +++
> >  net/mac80211/sta_info.h    |   8 +
> >  net/mac80211/tx.c          |  47 ++-
> >  11 files changed, 872 insertions(+), 15 deletions(-)
> >  create mode 100644 net/mac80211/airtime.c
> >
> > --
> > 2.24.0.rc1.363.gb1bccd3e3d-goog
> >
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-- 

Dave Täht
CTO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-831-205-9740