Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit b74118f0 authored by Jesse Brandeburg's avatar Jesse Brandeburg Committed by Jeff Kirsher
Browse files

i40e/i40evf: prefetch skb data on transmit 



Issue a prefetch for data early in the transmit path.
This should not be generally needed for Tx traffic, but
it helps immensely for pktgen workloads and should help
for forwarding workloads as well.

Change-ID: Iefee870c20599e0c4240e1d8637e4f16b625f83a
Signed-off-by: default avatarJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: default avatarAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 6a7fded7

drivers/net/ethernet/intel/i40e/i40e_txrx.c

+3 −0
Original line number Diff line number Diff line
@@ -2806,6 +2806,9 @@ static netdev_tx_t i40e_xmit_frame_ring(struct sk_buff *skb, 
	int tsyn;

	int tso;



	/* prefetch the data, we'll need it later */

	prefetch(skb->data);



	if (0 == i40e_xmit_descriptor_count(skb, tx_ring))

		return NETDEV_TX_BUSY;

drivers/net/ethernet/intel/i40evf/i40e_txrx.c

+3 −0
Original line number Diff line number Diff line
@@ -1993,6 +1993,9 @@ static netdev_tx_t i40e_xmit_frame_ring(struct sk_buff *skb, 
	u8 hdr_len = 0;

	int tso;



	/* prefetch the data, we'll need it later */

	prefetch(skb->data);



	if (0 == i40evf_xmit_descriptor_count(skb, tx_ring))

		return NETDEV_TX_BUSY;