The code being removed would enable time-based interrupt throttling for
the first MSI-X interrupt vector. This would throttle link status
change interrupts for NICs bound to vfio_pci driver; but for
igb_uio driver, rx queue 0 interrupts would be throttled. This resulted
in inconsistent latencies in a DPDK interrupt mode packet forwarding
application between the 2 drivers.
We'd like DPDK interrupt mode applications to be awaken by
inbound packet interrupts as soon as they are received regardless
of interrupt interval, interrupt throttling should be kept disabled.
Signed-off-by: David Su <david.w...@intel.com>
---
drivers/net/ixgbe/ixgbe_ethdev.c | 2 --
1 files changed, 0 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index bdf4e2b..fdfb7a6 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -5815,8 +5815,6 @@ ixgbe_configure_msix(struct rte_eth_dev *dev)
default:
break;
}
- IXGBE_WRITE_REG(hw, IXGBE_EITR(IXGBE_MISC_VEC_ID),
- IXGBE_MIN_INTER_INTERRUPT_INTERVAL_DEFAULT & 0xFFF);
/* set up to autoclear timer, and the vectors */
mask = IXGBE_EIMS_ENABLE_MASK;
--
1.7.0.4
