[dpdk-dev,4/4] net/ixgbevf: add check for rte_intr_enable.
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Commit Message
From: Tonghao Zhang <zhangtonghao@didichuxing.com>
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 <zhangtonghao@didichuxing.com>
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
---
drivers/net/ixgbe/ixgbe_ethdev.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
@@ -5631,7 +5631,9 @@ 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;
}
@@ -5680,7 +5682,10 @@ 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;
}