| From: |
| javen <javen_xu-AT-realsil.com.cn> |
| To: |
| <hkallweit1-AT-gmail.com>, <nic_swsd-AT-realtek.com>, <andrew+netdev-AT-lunn.ch>, <davem-AT-davemloft.net>, <edumazet-AT-google.com>, <kuba-AT-kernel.org>, <pabeni-AT-redhat.com>, <horms-AT-kernel.org> |
| Subject: |
| [Patch net-next v6 0/7] r8169: add RSS support for RTL8127 |
| Date: |
| Tue, 26 May 2026 16:11:10 +0800 |
| Message-ID: |
| <20260526081117.173-1-javen_xu@realsil.com.cn> |
| Cc: |
| <netdev-AT-vger.kernel.org>, <linux-kernel-AT-vger.kernel.org>, Javen Xu <javen_xu-AT-realsil.com.cn> |
| Archive-link: |
| Article |
From: Javen Xu <javen_xu@realsil.com.cn>
This patch series adds RSS (Receive Side Scaling) support for the r8169
ethernet driver, specifically for RTL8127 (RTL_GIGA_MAC_VER_80).
RSS enables packet distribution across multiple receive queues, which can
significantly improve network throughput on multi-core systems by allowing
parallel processing of incoming packets.
Key features:
- Multi-queue RX support (up to 8 queues)
- MSI-X interrupt with vector mapping
- Dynamic queue configuration via ethtool (-L)
- RSS hash computation for flow classification
Experiments:
Platform: AMD Ryzen Embedded R2514 with Radeon Graphics(4 Cores/8 Threads)
Arch: x86_64
Test command:
Server: iperf3 -s
Client: iperf3 -c 192.168.2.1 -P 20 -t 3600
Monitor: mpstat -P ALL 1
Before this patch (Without RSS):
Throughput: Unstable, fluctuating between 3.76 Gbits/sec and
8.2 Gbits/sec.
CPU Usage: A single CPU core is fully occupied with softirq reaching
up to 96%.
After this patch (With RSS enabled):
Throughput: Stable at 9.42 Gbits/sec.
CPU Usage: The traffic load is evenly distributed across multiple CPU
cores. The maximum softirq on a single core dropped to 63%.
Other Experiments:
Link: https://lore.kernel.org/netdev/0A5279953D81BB9C+f50c9b49-...
Javen Xu (7):
r8169: add support for multi irqs
r8169: add support for multi rx queues
r8169: add support for new interrupt mapping
r8169: enable new interrupt mapping
r8169: add support and enable rss
r8169: move struct ethtool_ops
r8169: support setting rx queue numbers via ethtool
drivers/net/ethernet/realtek/r8169_main.c | 1118 ++++++++++++++++++---
1 file changed, 977 insertions(+), 141 deletions(-)
--
2.43.0
