Messages in this thread |  | | From | javen <> | | Subject | [RFC Patch net-next v1 0/9] r8169: add RSS support for RTL8127 | | Date | Mon, 20 Apr 2026 10:19:48 +0800 |
| |
From: Javen Xu <javen_xu@realsil.com.cn>
This series patch adds RSS support for RTL8127 in the r8169 driver.
Currently, without RSS support, a single CPU core handles all incoming traffic. Under heavy loads, this single core becomes a bottleneck, causing high softirq usage and leading to unstable and degraded network throughput.
As a result, we add rss support for RTL8127. This RFC patch is just for discussing. And we do some experiments on AMD platform. Below is the result.
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%.
Patch summary: Patch 1: Adds necessary macro and register definitions for RSS. Patch 2-4: Support NAPI and multi RX/TX queues. Patch 5-6: Support MSI-X and enables it specifically for RTL8127. Patch 7: Enables RSS for RTL8127. Patch 8-9: Adds ethtool support to configure the number of RX queues.
Javen Xu (9): r8169: add some register definitions r8169: add napi and irq support r8169: add support for multi tx queues r8169: add support for multi rx queues r8169: add support for msix r8169: enable msix for RTL8127 r8169: add support and enable rss r8169: move struct ethtool_ops r8169: add support for ethtool
drivers/net/ethernet/realtek/r8169_main.c | 1437 ++++++++++++++++++--- 1 file changed, 1238 insertions(+), 199 deletions(-)
-- 2.43.0
|  |