Merge branch 'r8169-add-rss-support-for-rtl8127'

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Javen Xu says:

====================
r8169: add RSS support for RTL8127

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+f50c9b49-3e5d-467f-b69a-7e49ed223383@radxa.com/
====================

Link: https://patch.msgid.link/20261008065722.1026-1-javen_xu@realsil.com.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Jakub Kicinski 2026-10-19 14:58:41 -07:00

parent d1241cdbbc aaf99d89a7

commit 6f1edcae05

1 changed files with 973 additions and 149 deletions

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drivers/net/ethernet/realtek/r8169_main.c

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