netdev - [PATCH net-next RFC 0/2] don't clean packets in start

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Message-ID: <20250122061600.16781-1-jasowang@redhat.com>
Date: Wed, 22 Jan 2025 14:15:58 +0800
From: Jason Wang <jasowang@...hat.com>
To: mst@...hat.com,
	jasowang@...hat.com,
	xuanzhuo@...ux.alibaba.com,
	eperezma@...hat.com
Cc: andrew+netdev@...n.ch,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	virtualization@...ts.linux.dev,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next RFC 0/2] don't clean packets in start_xmit in TX NAPI mode

Hi all:

This is an RFC to try to speed up TX by avoid cleaning transmitted
packets in start_xmit() when TX NAPI mode is enabled. This increase
25%-62% PPS depending on the setups while keeping the TCP throughput.

More numbers could be seen in patch 2.

Thanks

Jason Wang (2):
  virtio-net: factor out logic for stopping TX
  virtio-net: free old xmit skbs only in NAPI

 drivers/net/virtio_net.c | 53 ++++++++++++++++++++++++++++++----------
 1 file changed, 40 insertions(+), 13 deletions(-)

-- 
2.34.1