From patchwork Mon Nov 13 09:39:33 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ping-Ke Shih X-Patchwork-Id: 10055429 X-Patchwork-Delegate: kvalo@adurom.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 6750F6029B for ; Mon, 13 Nov 2017 09:40:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 49557291CC for ; Mon, 13 Nov 2017 09:40:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3B864291E0; Mon, 13 Nov 2017 09:40:59 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 82B39291CC for ; Mon, 13 Nov 2017 09:40:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751143AbdKMJk4 (ORCPT ); Mon, 13 Nov 2017 04:40:56 -0500 Received: from rtits2.realtek.com ([211.75.126.72]:40099 "EHLO rtits2.realtek.com.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750972AbdKMJk4 (ORCPT ); Mon, 13 Nov 2017 04:40:56 -0500 Authenticated-By: X-SpamFilter-By: BOX Solutions SpamTrap 5.62 with qID vAD9ej4P027081, This message is accepted by code: ctloc85258 Received: from mail.realtek.com (rtitcas11.realtek.com.tw [172.21.6.12]) by rtits2.realtek.com.tw (8.15.2/2.57/5.78) with ESMTP id vAD9ej4P027081; Mon, 13 Nov 2017 17:40:45 +0800 Received: from RTITCASV01.realtek.com.tw (172.21.6.18) by RTITCAS11.realtek.com.tw (172.21.6.12) with Microsoft SMTP Server (TLS) id 14.3.351.0; Mon, 13 Nov 2017 17:40:45 +0800 Received: from localhost.localdomain (172.21.69.107) by RTITCASV01.realtek.com.tw (172.21.6.18) with Microsoft SMTP Server id 14.3.294.0; Mon, 13 Nov 2017 17:39:44 +0800 From: To: , CC: , , Subject: [PATCH 1/3] rtlwifi: Reduce IO in RX interrupt to boost throughput Date: Mon, 13 Nov 2017 17:39:33 +0800 Message-ID: <20171113093935.20431-2-pkshih@realtek.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20171113093935.20431-1-pkshih@realtek.com> References: <20171113093935.20431-1-pkshih@realtek.com> MIME-Version: 1.0 X-Originating-IP: [172.21.69.107] Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Ping-Ke Shih 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 --- 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 c2575b0b9440..ca3f4716c1b6 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)