From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tonghao Zhang Subject: [PATCH 4/5] net/ixgbevf: add check for rte_intr_enable. Date: Fri, 5 Jan 2018 05:57:55 -0800 Message-ID: <1515160676-4296-4-git-send-email-xiangxia.m.yue@gmail.com> References: <1515160676-4296-1-git-send-email-xiangxia.m.yue@gmail.com> Cc: Tonghao Zhang To: dev@dpdk.org Return-path: Received: from mail-pl0-f66.google.com (mail-pl0-f66.google.com [209.85.160.66]) by dpdk.org (Postfix) with ESMTP id 9C5641B16E for ; Fri, 5 Jan 2018 14:58:11 +0100 (CET) Received: by mail-pl0-f66.google.com with SMTP id s3so3076144plp.4 for ; Fri, 05 Jan 2018 05:58:11 -0800 (PST) In-Reply-To: <1515160676-4296-1-git-send-email-xiangxia.m.yue@gmail.com> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" When we bind the ixgbevf to vfio and call the rte_eth_dev_rx_intr_enable and rte_eth_dev_rx_intr_disable frequently, the interrupt setting (msi_set_mask_bit) will take more CPU as show below. rte_intr_enable call the ioctl to map the fd to interrupts frequently. perf top: 5.45% [kernel] [k] msi_set_mask_bit It is unnecessary to call the rte_intr_enable in ixgbe_dev_rx_queue_intr_enable. because the fds has been mapped to interrupt and not unmapped in ixgbe_dev_rx_queue_intr_disable. This patch add checks for using VFIO. With the patch, msi_set_mask_bit is not listed in perl any more. Any suggestion will be welcome. Signed-off-by: Tonghao Zhang --- drivers/net/ixgbe/ixgbe_ethdev.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c index e929235..79e4097 100644 --- a/drivers/net/ixgbe/ixgbe_ethdev.c +++ b/drivers/net/ixgbe/ixgbe_ethdev.c @@ -5610,7 +5610,9 @@ static void ixgbevf_set_vfta_all(struct rte_eth_dev *dev, bool on) RTE_SET_USED(queue_id); IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, intr->mask); - rte_intr_enable(intr_handle); + if (intr_handle->type == RTE_INTR_HANDLE_UIO || + intr_handle->type == RTE_INTR_HANDLE_UIO_INTX) + rte_intr_enable(intr_handle); return 0; } @@ -5659,7 +5661,10 @@ static void ixgbevf_set_vfta_all(struct rte_eth_dev *dev, bool on) mask &= (1 << (queue_id - 32)); IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask); } - rte_intr_enable(intr_handle); + + if (intr_handle->type == RTE_INTR_HANDLE_UIO || + intr_handle->type == RTE_INTR_HANDLE_UIO_INTX) + rte_intr_enable(intr_handle); return 0; } -- 1.8.3.1