Re: [Patch net-next v1 0/7] r8169: add RSS support for RTL8127

[Heiner Kallweit]

On 06.05.2026 10:13, javen wrote:
> From: Javen Xu <javen_xu@xxxxxxxxxxxxxx>
> 
> This patch series adds RSS (Receive Side Scaling) support for the r8169
> ethernet driver, specifically for RTL8127 (RTL_GIGA_MAC_VER_80).

Series adds RSS support for RTL8127 only. Is this generic enough to retrofit
RSS support for other chip versions like RTL8126 w/o bigger refactoring?

> 
> 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@xxxxxxxxx/
> 
> 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: add support for ethtool
> 
>  drivers/net/ethernet/realtek/r8169_main.c | 1202 ++++++++++++++++++---
>  1 file changed, 1080 insertions(+), 122 deletions(-)
>