From patchwork Fri Feb 28 06:00:04 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amir Vadai X-Patchwork-Id: 325037 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 91BE52C00A2 for ; Fri, 28 Feb 2014 17:00:49 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751604AbaB1GAp (ORCPT ); Fri, 28 Feb 2014 01:00:45 -0500 Received: from mailp.voltaire.com ([193.47.165.129]:43017 "EHLO mellanox.co.il" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1750942AbaB1GA0 (ORCPT ); Fri, 28 Feb 2014 01:00:26 -0500 Received: from Internal Mail-Server by MTLPINE2 (envelope-from amirv@mellanox.com) with SMTP; 28 Feb 2014 08:00:20 +0200 Received: from mtl-eit-vdi-22.mtl.labs.mlnx (mtl-eit-vdi-22.mtl.labs.mlnx [10.7.132.72]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id s1S60JqI013730; Fri, 28 Feb 2014 08:00:20 +0200 From: Amir Vadai To: "David S. Miller" Cc: netdev@vger.kernel.org, Amir Vadai , Yevgeny Petrilin , Or Gerlitz , Eugenia Emantayev Subject: [PATCH net-next V1 4/9] net/mlx4_en: Move queue stopped/waked counters to be per ring Date: Fri, 28 Feb 2014 08:00:04 +0200 Message-Id: <1393567209-16358-5-git-send-email-amirv@mellanox.com> X-Mailer: git-send-email 1.8.3.4 In-Reply-To: <1393567209-16358-1-git-send-email-amirv@mellanox.com> References: <1393567209-16358-1-git-send-email-amirv@mellanox.com> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Eugenia Emantayev Give accurate counters and avoids cache misses when several rings update the counters of stop/wake queue. Signed-off-by: Eugenia Emantayev Signed-off-by: Amir Vadai --- drivers/net/ethernet/mellanox/mlx4/en_port.c | 6 ++++++ drivers/net/ethernet/mellanox/mlx4/en_tx.c | 6 +++--- drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 2 ++ 3 files changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/en_port.c b/drivers/net/ethernet/mellanox/mlx4/en_port.c index dae1a1f..c2cfb05 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_port.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_port.c @@ -148,10 +148,16 @@ int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset) stats->tx_packets = 0; stats->tx_bytes = 0; priv->port_stats.tx_chksum_offload = 0; + priv->port_stats.queue_stopped = 0; + priv->port_stats.wake_queue = 0; + for (i = 0; i < priv->tx_ring_num; i++) { stats->tx_packets += priv->tx_ring[i]->packets; stats->tx_bytes += priv->tx_ring[i]->bytes; priv->port_stats.tx_chksum_offload += priv->tx_ring[i]->tx_csum; + priv->port_stats.queue_stopped += + priv->tx_ring[i]->queue_stopped; + priv->port_stats.wake_queue += priv->tx_ring[i]->wake_queue; } stats->rx_errors = be64_to_cpu(mlx4_en_stats->PCS) + diff --git a/drivers/net/ethernet/mellanox/mlx4/en_tx.c b/drivers/net/ethernet/mellanox/mlx4/en_tx.c index 781ebca..56e8fbc 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c @@ -445,7 +445,7 @@ static int mlx4_en_process_tx_cq(struct net_device *dev, */ if (netif_tx_queue_stopped(ring->tx_queue) && txbbs_skipped > 0) { netif_tx_wake_queue(ring->tx_queue); - priv->port_stats.wake_queue++; + ring->wake_queue++; } return done; } @@ -691,7 +691,7 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev) ring->size - HEADROOM - MAX_DESC_TXBBS)) { /* every full Tx ring stops queue */ netif_tx_stop_queue(ring->tx_queue); - priv->port_stats.queue_stopped++; + ring->queue_stopped++; /* If queue was emptied after the if, and before the * stop_queue - need to wake the queue, or else it will remain @@ -704,7 +704,7 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev) if (unlikely(((int)(ring->prod - ring->cons)) <= ring->size - HEADROOM - MAX_DESC_TXBBS)) { netif_tx_wake_queue(ring->tx_queue); - priv->port_stats.wake_queue++; + ring->wake_queue++; } else { return NETDEV_TX_BUSY; } diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h index 2610cc5..c59011d 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h @@ -274,6 +274,8 @@ struct mlx4_en_tx_ring { unsigned long bytes; unsigned long packets; unsigned long tx_csum; + unsigned long queue_stopped; + unsigned long wake_queue; struct mlx4_bf bf; bool bf_enabled; struct netdev_queue *tx_queue;