diff options
| author |   Qi Zhou <qizhou@google.com> | 2015-07-22 16:38:24 -0400 |
|---|---|---|
| committer |   Kalle Valo <kvalo@qca.qualcomm.com> | 2015-07-29 11:27:24 +0300 |
| commit | 005fb161310f72070ad5f4352d6b81ffaca8a11e (patch) | |
| tree | 02d2756fd70810e72998007b9ffa732f294060c8 /drivers/net/wireless/ath/ath10k/txrx.c | |
| parent | ath10k: suppress 'failed to process fft' warning messages (diff) | |
| download | linux-dev-005fb161310f72070ad5f4352d6b81ffaca8a11e.tar.xz linux-dev-005fb161310f72070ad5f4352d6b81ffaca8a11e.zip | |
ath10k: Improve performance by reducing tx_lock contention
During tx completion, tx_lock is held for longer than required, preventing
efficient refill of htt->pending_tx. Refactor the code so that only MSDU
related operations are protected by the lock.
Improves downstream performance on a dual-core ARM Freescale LS1024A
(f.k.a. Mindspeed Comcerto 2000) AP with a 3x3 client from 495 to 580 Mbps.
Other CPU bound multicore systems may also benefit.
Signed-off-by: Denton Gentry <dgentry@google.com>
Signed-off-by: Avery Pennarun <apenwarr@google.com>
[mfaltesek@google.com: removed conflicting code for tracking msdu_ids.]
Signed-off-by: Marty Faltesek <mfaltesek@google.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath10k/txrx.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath10k/txrx.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/drivers/net/wireless/ath/ath10k/txrx.c b/drivers/net/wireless/ath/ath10k/txrx.c index 6cf289158840..e4a9c4c8d0cb 100644 --- a/drivers/net/wireless/ath/ath10k/txrx.c +++ b/drivers/net/wireless/ath/ath10k/txrx.c @@ -53,8 +53,6 @@ void ath10k_txrx_tx_unref(struct ath10k_htt *htt, struct ath10k_skb_cb *skb_cb; struct sk_buff *msdu; - lockdep_assert_held(&htt->tx_lock); - ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx completion msdu_id %u discard %d no_ack %d success %d\n", tx_done->msdu_id, !!tx_done->discard, @@ -66,12 +64,19 @@ void ath10k_txrx_tx_unref(struct ath10k_htt *htt, return; } + spin_lock_bh(&htt->tx_lock); msdu = idr_find(&htt->pending_tx, tx_done->msdu_id); if (!msdu) { ath10k_warn(ar, "received tx completion for invalid msdu_id: %d\n", tx_done->msdu_id); + spin_unlock_bh(&htt->tx_lock); return; } + ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id); + __ath10k_htt_tx_dec_pending(htt); + if (htt->num_pending_tx == 0) + wake_up(&htt->empty_tx_wq); + spin_unlock_bh(&htt->tx_lock); skb_cb = ATH10K_SKB_CB(msdu); @@ -90,7 +95,7 @@ void ath10k_txrx_tx_unref(struct ath10k_htt *htt, if (tx_done->discard) { ieee80211_free_txskb(htt->ar->hw, msdu); - goto exit; + return; } if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) @@ -104,12 +109,6 @@ void ath10k_txrx_tx_unref(struct ath10k_htt *htt, ieee80211_tx_status(htt->ar->hw, msdu); /* we do not own the msdu anymore */ - -exit: - ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id); - __ath10k_htt_tx_dec_pending(htt); - if (htt->num_pending_tx == 0) - wake_up(&htt->empty_tx_wq); } struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id, |