[PATCH] net/iavf: set interrupt throttling register

[PATCH] net/iavf: set interrupt throttling register

[Bruce Richardson]

The interrupt throttling register(ITR) bank 0 value is set to 2, but
to ensure best performance across all systems also set the bank 1 value
to match.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/intel/iavf/iavf_ethdev.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/net/intel/iavf/iavf_ethdev.c b/drivers/net/intel/iavf/iavf_ethdev.c
index a8abe0154c..dc3cea0b95 100644
--- a/drivers/net/intel/iavf/iavf_ethdev.c
+++ b/drivers/net/intel/iavf/iavf_ethdev.c
@@ -899,10 +899,7 @@ static int iavf_config_rx_queues_irqs(struct rte_eth_dev *dev,
 				       (0 << IAVF_VFINT_DYN_CTLN1_ITR_INDX_SHIFT) |
 				       IAVF_VFINT_DYN_CTLN1_WB_ON_ITR_MASK |
 				       (2UL << IAVF_VFINT_DYN_CTLN1_INTERVAL_SHIFT));
-			/* debug - check for success! the return value
-			 * should be 2, offset is 0x2800
-			 */
-			/* IAVF_READ_REG(hw, IAVF_VFINT_ITRN1(0, 0)); */
+			IAVF_WRITE_REG(hw, IAVF_VFINT_ITRN1(1, vf->msix_base - 1), 2);
 		} else {
 			/* If no WB_ON_ITR offload flags, need to set
 			 * interrupt for descriptor write back.
-- 
2.53.0

Re: [PATCH] net/iavf: set interrupt throttling register

[Burakov, Anatoly]

On 10/5/2026 1:06 PM, Bruce Richardson wrote:
> The interrupt throttling register(ITR) bank 0 value is set to 2, but
> to ensure best performance across all systems also set the bank 1 value
> to match.
> 
> Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
> ---

Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>

-- 
Thanks,
Anatoly