From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FUZZY_XPILL,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51E3BC5B57D for ; Wed, 3 Jul 2019 02:19:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2BB3E21874 for ; Wed, 3 Jul 2019 02:19:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562120366; bh=lENIlEV+ZrCZrAg2zRAaefLXf3dzUtTHps/YFHXJheI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=2SDNEBbn4GuW2e/euQDr1Qz6m7E16oQEgrF2mG2wVcUTFP0RLBnO4MeiM6RQIQOaz 9LH0okOAq1Ta1rnwOYnG42Nv23ew2mIL/yetucRse+W77wxEzeDihhevdQ4zESJu5v qbqiCoYMoQqTz8w43OYaamkDsx1f9BDk5YL0PneA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728435AbfGCCTY (ORCPT ); Tue, 2 Jul 2019 22:19:24 -0400 Received: from mail.kernel.org ([198.145.29.99]:56970 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727411AbfGCCTH (ORCPT ); Tue, 2 Jul 2019 22:19:07 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 201A221873; Wed, 3 Jul 2019 02:19:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562120345; bh=lENIlEV+ZrCZrAg2zRAaefLXf3dzUtTHps/YFHXJheI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MUtqGOCfTuocVT4h0RmrFD8aqYnWO4vq+IwoF5UHMQ4M8e+1NkoJoSMYqSFiZrXFS B9QL6IDV3Gk+O7J8qVvH+L/brhRXlgiWAuQmikJJm9i8w6RtTvCuVHeXd01az4udrE Z8WWbXB6lsP+UmxW3YO4b5ADYsKPaDKP0j5SPU1Q= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Sergej Benilov , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 5/6] sis900: fix TX completion Date: Tue, 2 Jul 2019 22:18:57 -0400 Message-Id: <20190703021858.18653-5-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190703021858.18653-1-sashal@kernel.org> References: <20190703021858.18653-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sergej Benilov [ Upstream commit 8ac8a01092b2added0749ef937037bf1912e13e3 ] Since commit 605ad7f184b60cfaacbc038aa6c55ee68dee3c89 "tcp: refine TSO autosizing", outbound throughput is dramatically reduced for some connections, as sis900 is doing TX completion within idle states only. Make TX completion happen after every transmitted packet. Test: netperf before patch: > netperf -H remote -l -2000000 -- -s 1000000 MIGRATED TCP STREAM TEST from 0.0.0.0 () port 0 AF_INET to 95.223.112.76 () port 0 AF_INET : demo Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 327680 327680 253.44 0.06 after patch: > netperf -H remote -l -10000000 -- -s 1000000 MIGRATED TCP STREAM TEST from 0.0.0.0 () port 0 AF_INET to 95.223.112.76 () port 0 AF_INET : demo Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 327680 327680 5.38 14.89 Thx to Dave Miller and Eric Dumazet for helpful hints Signed-off-by: Sergej Benilov Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/sis/sis900.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/sis/sis900.c b/drivers/net/ethernet/sis/sis900.c index fd812d2e5e1c..dff5b56738d3 100644 --- a/drivers/net/ethernet/sis/sis900.c +++ b/drivers/net/ethernet/sis/sis900.c @@ -1058,7 +1058,7 @@ sis900_open(struct net_device *net_dev) sis900_set_mode(sis_priv, HW_SPEED_10_MBPS, FDX_CAPABLE_HALF_SELECTED); /* Enable all known interrupts by setting the interrupt mask. */ - sw32(imr, RxSOVR | RxORN | RxERR | RxOK | TxURN | TxERR | TxIDLE); + sw32(imr, RxSOVR | RxORN | RxERR | RxOK | TxURN | TxERR | TxIDLE | TxDESC); sw32(cr, RxENA | sr32(cr)); sw32(ier, IE); @@ -1581,7 +1581,7 @@ static void sis900_tx_timeout(struct net_device *net_dev) sw32(txdp, sis_priv->tx_ring_dma); /* Enable all known interrupts by setting the interrupt mask. */ - sw32(imr, RxSOVR | RxORN | RxERR | RxOK | TxURN | TxERR | TxIDLE); + sw32(imr, RxSOVR | RxORN | RxERR | RxOK | TxURN | TxERR | TxIDLE | TxDESC); } /** @@ -1621,7 +1621,7 @@ sis900_start_xmit(struct sk_buff *skb, struct net_device *net_dev) spin_unlock_irqrestore(&sis_priv->lock, flags); return NETDEV_TX_OK; } - sis_priv->tx_ring[entry].cmdsts = (OWN | skb->len); + sis_priv->tx_ring[entry].cmdsts = (OWN | INTR | skb->len); sw32(cr, TxENA | sr32(cr)); sis_priv->cur_tx ++; @@ -1677,7 +1677,7 @@ static irqreturn_t sis900_interrupt(int irq, void *dev_instance) do { status = sr32(isr); - if ((status & (HIBERR|TxURN|TxERR|TxIDLE|RxORN|RxERR|RxOK)) == 0) + if ((status & (HIBERR|TxURN|TxERR|TxIDLE|TxDESC|RxORN|RxERR|RxOK)) == 0) /* nothing intresting happened */ break; handled = 1; @@ -1687,7 +1687,7 @@ static irqreturn_t sis900_interrupt(int irq, void *dev_instance) /* Rx interrupt */ sis900_rx(net_dev); - if (status & (TxURN | TxERR | TxIDLE)) + if (status & (TxURN | TxERR | TxIDLE | TxDESC)) /* Tx interrupt */ sis900_finish_xmit(net_dev); @@ -1899,8 +1899,8 @@ static void sis900_finish_xmit (struct net_device *net_dev) if (tx_status & OWN) { /* The packet is not transmitted yet (owned by hardware) ! - * Note: the interrupt is generated only when Tx Machine - * is idle, so this is an almost impossible case */ + * Note: this is an almost impossible condition + * in case of TxDESC ('descriptor interrupt') */ break; } @@ -2476,7 +2476,7 @@ static int sis900_resume(struct pci_dev *pci_dev) sis900_set_mode(sis_priv, HW_SPEED_10_MBPS, FDX_CAPABLE_HALF_SELECTED); /* Enable all known interrupts by setting the interrupt mask. */ - sw32(imr, RxSOVR | RxORN | RxERR | RxOK | TxURN | TxERR | TxIDLE); + sw32(imr, RxSOVR | RxORN | RxERR | RxOK | TxURN | TxERR | TxIDLE | TxDESC); sw32(cr, RxENA | sr32(cr)); sw32(ier, IE); -- 2.20.1