From: Rajkumar Manoharan <rmanohar@qti.qualcomm.com> To: <ath10k@lists.infradead.org> Cc: <linux-wireless@vger.kernel.org>, <rmanohar@codeaurora.org>, "Rajkumar Manoharan" <rmanohar@qti.qualcomm.com> Subject: [PATCH] ath10k: fix throughput regression in multi client mode Date: Mon, 29 Aug 2016 13:46:13 +0530 [thread overview] Message-ID: <20160829081613.1474-1-rmanohar@qti.qualcomm.com> (raw) commit 7a0adc83f34d ("ath10k: improve tx scheduling") is causing severe throughput drop in multi client mode. This issue is originally reported in veriwave setup with 50 clients with TCP downlink traffic. While increasing number of clients, the average throughput drops gradually. With 50 clients, the combined peak throughput is decreased to 98 Mbps whereas reverting given commit restored it to 550 Mbps. Processing txqs for every tx completion is causing overhead. Ideally for management frame tx completion, pending txqs processing can be avoided. The change partly reverts the commit "ath10k: improve tx scheduling". Processing pending txqs after all skbs tx completion will yeild enough room to burst tx frames. Fixes: 7a0adc83f34d ("ath10k: improve tx scheduling") Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com> --- drivers/net/wireless/ath/ath10k/htt_rx.c | 2 ++ drivers/net/wireless/ath/ath10k/txrx.c | 2 -- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c index d3f8baf532d4..2d62921bcd4e 100644 --- a/drivers/net/wireless/ath/ath10k/htt_rx.c +++ b/drivers/net/wireless/ath/ath10k/htt_rx.c @@ -2445,6 +2445,8 @@ int ath10k_htt_txrx_compl_task(struct ath10k *ar, int budget) while (kfifo_get(&htt->txdone_fifo, &tx_done)) ath10k_txrx_tx_unref(htt, &tx_done); + ath10k_mac_tx_push_pending(ar); + spin_lock_irqsave(&htt->tx_fetch_ind_q.lock, flags); skb_queue_splice_init(&htt->tx_fetch_ind_q, &tx_ind_q); spin_unlock_irqrestore(&htt->tx_fetch_ind_q.lock, flags); diff --git a/drivers/net/wireless/ath/ath10k/txrx.c b/drivers/net/wireless/ath/ath10k/txrx.c index 98f3bb47414c..5d645f989ce2 100644 --- a/drivers/net/wireless/ath/ath10k/txrx.c +++ b/drivers/net/wireless/ath/ath10k/txrx.c @@ -125,8 +125,6 @@ int ath10k_txrx_tx_unref(struct ath10k_htt *htt, ieee80211_tx_status(htt->ar->hw, msdu); /* we do not own the msdu anymore */ - ath10k_mac_tx_push_pending(ar); - return 0; } -- 2.9.3
WARNING: multiple messages have this Message-ID (diff)
From: Rajkumar Manoharan <rmanohar@qti.qualcomm.com> To: ath10k@lists.infradead.org Cc: linux-wireless@vger.kernel.org, Rajkumar Manoharan <rmanohar@qti.qualcomm.com>, rmanohar@codeaurora.org Subject: [PATCH] ath10k: fix throughput regression in multi client mode Date: Mon, 29 Aug 2016 13:46:13 +0530 [thread overview] Message-ID: <20160829081613.1474-1-rmanohar@qti.qualcomm.com> (raw) commit 7a0adc83f34d ("ath10k: improve tx scheduling") is causing severe throughput drop in multi client mode. This issue is originally reported in veriwave setup with 50 clients with TCP downlink traffic. While increasing number of clients, the average throughput drops gradually. With 50 clients, the combined peak throughput is decreased to 98 Mbps whereas reverting given commit restored it to 550 Mbps. Processing txqs for every tx completion is causing overhead. Ideally for management frame tx completion, pending txqs processing can be avoided. The change partly reverts the commit "ath10k: improve tx scheduling". Processing pending txqs after all skbs tx completion will yeild enough room to burst tx frames. Fixes: 7a0adc83f34d ("ath10k: improve tx scheduling") Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com> --- drivers/net/wireless/ath/ath10k/htt_rx.c | 2 ++ drivers/net/wireless/ath/ath10k/txrx.c | 2 -- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c index d3f8baf532d4..2d62921bcd4e 100644 --- a/drivers/net/wireless/ath/ath10k/htt_rx.c +++ b/drivers/net/wireless/ath/ath10k/htt_rx.c @@ -2445,6 +2445,8 @@ int ath10k_htt_txrx_compl_task(struct ath10k *ar, int budget) while (kfifo_get(&htt->txdone_fifo, &tx_done)) ath10k_txrx_tx_unref(htt, &tx_done); + ath10k_mac_tx_push_pending(ar); + spin_lock_irqsave(&htt->tx_fetch_ind_q.lock, flags); skb_queue_splice_init(&htt->tx_fetch_ind_q, &tx_ind_q); spin_unlock_irqrestore(&htt->tx_fetch_ind_q.lock, flags); diff --git a/drivers/net/wireless/ath/ath10k/txrx.c b/drivers/net/wireless/ath/ath10k/txrx.c index 98f3bb47414c..5d645f989ce2 100644 --- a/drivers/net/wireless/ath/ath10k/txrx.c +++ b/drivers/net/wireless/ath/ath10k/txrx.c @@ -125,8 +125,6 @@ int ath10k_txrx_tx_unref(struct ath10k_htt *htt, ieee80211_tx_status(htt->ar->hw, msdu); /* we do not own the msdu anymore */ - ath10k_mac_tx_push_pending(ar); - return 0; } -- 2.9.3 _______________________________________________ ath10k mailing list ath10k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath10k
next reply other threads:[~2016-08-29 8:17 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-08-29 8:16 Rajkumar Manoharan [this message] 2016-08-29 8:16 ` [PATCH] ath10k: fix throughput regression in multi client mode Rajkumar Manoharan 2016-08-31 8:24 ` Kalle Valo 2016-08-31 8:24 ` Kalle Valo 2016-09-02 16:30 ` Valo, Kalle 2016-09-02 16:30 ` Valo, Kalle 2016-09-09 12:07 ` Kalle Valo 2016-09-09 12:07 ` Kalle Valo
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