[PATCHv2 0/7] ath10k: improve TX path

Michal Kazior michal.kazior at tieto.com
Fri Sep 13 08:16:51 EDT 2013


This patchset addresses two issues:

 * system/userspace starvation on heavy briding
 * unstable/inconsistent UDP TX throughput

In short the patchset simplifies TX path by
removing HTC TX workers, makes WMI commands block
and makes ath10k more responsive to queues
becoming full. This contributes to both improved
throughput and makes the system more responsive
under heavy UDP TX load.

Max stable briding TX (ath10k as TX):
 UDP w/o patchset: 520mbps
 UDP w/  patchset: 570mbps

 TCP w/o patchset: 350mbps
 TCP w/  patchset: 400mbps

Measured with two 2x2 cards, one acting as an AP
on AP135 board, the other as a STA on a core i5
laptop. The AP135 was passing traffic from a
station on LAN/eth1 to the STA/wlan0.

 * comment usage of ath10k_wmi_tx_beacons_nowait
 * additional check for tx_credits_flow_enabled

Michal Kazior (7):
  ath10k: simplify HTC credits calculation
  ath10k: add HTC TX credits replenishing notification
  ath10k: make WMI commands block by design
  ath10k: simplify HTC command submitting
  ath10k: improve beacon submission latency
  ath10k: remove wmi pending count limit
  ath10k: remove wmi event worker thread

 drivers/net/wireless/ath/ath10k/core.h  |    7 +-
 drivers/net/wireless/ath/ath10k/htc.c   |  215 +++++++------------------------
 drivers/net/wireless/ath/ath10k/htc.h   |    5 +-
 drivers/net/wireless/ath/ath10k/mac.c   |   16 +--
 drivers/net/wireless/ath/ath10k/trace.h |   11 +-
 drivers/net/wireless/ath/ath10k/wmi.c   |  201 ++++++++++++++---------------
 drivers/net/wireless/ath/ath10k/wmi.h   |    5 +-
 7 files changed, 160 insertions(+), 300 deletions(-)


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