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Message-ID: <20230724034048.51482-1-gavinl@nvidia.com>
Date: Mon, 24 Jul 2023 06:40:44 +0300
From: Gavin Li <gavinl@...dia.com>
To: <mst@...hat.com>, <jasowang@...hat.com>,
<xuanzhuo@...ux.alibaba.com>, <davem@...emloft.net>,
<edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
<ast@...nel.org>, <daniel@...earbox.net>, <hawk@...nel.org>,
<john.fastabend@...il.com>, <jiri@...dia.com>,
<dtatulea@...dia.com>
CC: <gavi@...dia.com>, <virtualization@...ts.linux-foundation.org>,
<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<bpf@...r.kernel.org>
Subject: [PATCH net-next V3 0/4] virtio_net: add per queue interrupt coalescing support
Currently, coalescing parameters are grouped for all transmit and receive
virtqueues. This patch series add support to set or get the parameters for
a specified virtqueue.
When the traffic between virtqueues is unbalanced, for example, one virtqueue
is busy and another virtqueue is idle, then it will be very useful to
control coalescing parameters at the virtqueue granularity.
Example command:
$ ethtool -Q eth5 queue_mask 0x1 --coalesce tx-packets 10
Would set max_packets=10 to VQ 1.
$ ethtool -Q eth5 queue_mask 0x1 --coalesce rx-packets 10
Would set max_packets=10 to VQ 0.
$ ethtool -Q eth5 queue_mask 0x1 --show-coalesce
Queue: 0
Adaptive RX: off TX: off
stats-block-usecs: 0
sample-interval: 0
pkt-rate-low: 0
pkt-rate-high: 0
rx-usecs: 222
rx-frames: 0
rx-usecs-irq: 0
rx-frames-irq: 256
tx-usecs: 222
tx-frames: 0
tx-usecs-irq: 0
tx-frames-irq: 256
rx-usecs-low: 0
rx-frame-low: 0
tx-usecs-low: 0
tx-frame-low: 0
rx-usecs-high: 0
rx-frame-high: 0
tx-usecs-high: 0
tx-frame-high: 0
Gavin Li (4):
virtio_net: extract interrupt coalescing settings to a structure
virtio_net: extract get/set interrupt coalesce to a function
virtio_net: support per queue interrupt coalesce command
---
changelog:
v1->v2
- Addressed the comment from Xuan Zhuo
- Allocate memory from heap instead of using stack memory for control vq
messages
v2->v3
- Addressed the comment from Heng Qi
- Use control_buf for control vq messages
---
virtio_net: enable per queue interrupt coalesce feature
drivers/net/virtio_net.c | 172 ++++++++++++++++++++++++++------
include/uapi/linux/virtio_net.h | 14 +++
2 files changed, 157 insertions(+), 29 deletions(-)
--
2.39.1
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