diff mbox

[dpdk-dev,net-next,v4,1/4] net/ixgbevf: set the interrupt interval for EITR

Message ID 1524884620-64598-2-git-send-email-xiangxia.m.yue@gmail.com (mailing list archive)
State Accepted, archived
Delegated to: Helin Zhang
Headers

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation fail apply issues

Commit Message

Tonghao Zhang April 28, 2018, 3:03 a.m. UTC 
  From: Tonghao Zhang <xiangxia.m.yue@gmail.com>

Set EITR interval as default. This patch can improve the
performance when we enable the rx-interrupt to process the
packets because we hope rx-interrupt reduce CPU. For example,
the 200us value of EITR makes the performance better with
the low CPU. The default value of ITR is 500us, compatible
with RSC of ixgbe PF, and next patch will use the default value.

Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 7 +++++++
 drivers/net/ixgbe/ixgbe_ethdev.h | 1 +
 2 files changed, 8 insertions(+)
diff mbox

Patch

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 6088c7e..bdede8b 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -5803,6 +5803,13 @@  static void ixgbevf_set_vfta_all(struct rte_eth_dev *dev, bool on)
 		if (vector_idx < base + intr_handle->nb_efd - 1)
 			vector_idx++;
 	}
+
+	/* As RX queue setting above show, all queues use the vector 0.
+	 * Set only the ITR value of IXGBE_MISC_VEC_ID.
+	 */
+	IXGBE_WRITE_REG(hw, IXGBE_VTEITR(IXGBE_MISC_VEC_ID),
+			IXGBE_EITR_INTERVAL_US(IXGBE_QUEUE_ITR_INTERVAL_DEFAULT)
+			| IXGBE_EITR_CNT_WDIS);
 }
 
 /**
diff --git a/drivers/net/ixgbe/ixgbe_ethdev.h b/drivers/net/ixgbe/ixgbe_ethdev.h
index cc512d6..e42ec30 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.h
+++ b/drivers/net/ixgbe/ixgbe_ethdev.h
@@ -62,6 +62,7 @@ 
 	(((us) * 1000 / IXGBE_EITR_INTERVAL_UNIT_NS << IXGBE_EITR_ITR_INT_SHIFT) & \
 		IXGBE_EITR_ITR_INT_MASK)
 
+#define IXGBE_QUEUE_ITR_INTERVAL_DEFAULT	500 /* 500us */
 
 /* Loopback operation modes */
 /* 82599 specific loopback operation types */