From fb9829e90dcd5365c45478629e45075560ea8644 Mon Sep 17 00:00:00 2001 From: Ping-Ke Shih Date: Mon, 13 Nov 2017 17:39:33 +0800 Subject: rtlwifi: Reduce IO in RX interrupt to boost throughput Check remaining count of RX packets cost a lot of CPU time, so only update when the counter decreases to zero. In old flow, the counter was updated once a RX packet is received. Signed-off-by: Steven Ting Signed-off-by: Ping-Ke Shih Signed-off-by: Kalle Valo --- drivers/net/wireless/realtek/rtlwifi/pci.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/realtek/rtlwifi/pci.c b/drivers/net/wireless/realtek/rtlwifi/pci.c index ed6e4a5b99de..b28e6e35c6db 100644 --- a/drivers/net/wireless/realtek/rtlwifi/pci.c +++ b/drivers/net/wireless/realtek/rtlwifi/pci.c @@ -747,7 +747,7 @@ static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw) u8 tmp_one; bool unicast = false; u8 hw_queue = 0; - unsigned int rx_remained_cnt; + unsigned int rx_remained_cnt = 0; struct rtl_stats stats = { .signal = 0, .rate = 0, @@ -768,7 +768,8 @@ static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw) struct sk_buff *new_skb; if (rtlpriv->use_new_trx_flow) { - rx_remained_cnt = + if (rx_remained_cnt == 0) + rx_remained_cnt = rtlpriv->cfg->ops->rx_desc_buff_remained_cnt(hw, hw_queue); if (rx_remained_cnt == 0) -- cgit v1.2.3