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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 <steventing@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Ping-Ke Shih 2017-11-13 17:39:33 +08:00 committed by Kalle Valo
parent 78aa601203
commit fb9829e90d
1 changed files with 3 additions and 2 deletions
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5
drivers/net/wireless/realtek/rtlwifi/pci.c
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@ -747,7 +747,7 @@ static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw)
u8 tmp_one; u8 tmp_one;
bool unicast = false; bool unicast = false;
u8 hw_queue = 0; u8 hw_queue = 0;
unsigned int rx_remained_cnt; unsigned int rx_remained_cnt = 0;
struct rtl_stats stats = { struct rtl_stats stats = {
.signal = 0, .signal = 0,
.rate = 0, .rate = 0,
@ -768,7 +768,8 @@ static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw)
struct sk_buff *new_skb; struct sk_buff *new_skb;
if (rtlpriv->use_new_trx_flow) { 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, rtlpriv->cfg->ops->rx_desc_buff_remained_cnt(hw,
hw_queue); hw_queue);
if (rx_remained_cnt == 0) if (rx_remained_cnt == 0)