R7800 performance

quarky · August 19, 2020, 2:13am

The script below is used to configure both ingress and egress shapers:

# Shape ingress traffic to 500 Mbit with chained NSSFQ_CODEL
tc qdisc add dev nssifb root handle 1: nsstbl rate 500Mbit burst 1Mb
tc qdisc add dev nssifb parent 1: handle 10: nssfq_codel limit 10240 flows 1024 quantum 1514 target 5ms interval 100ms set_default

# Shape egress traffic to 200 Mbit with chained NSSFQ_CODEL
tc qdisc add dev eth0 root handle 1: nsstbl rate 200Mbit burst 1Mb
tc qdisc add dev eth0 parent 1: handle 10: nssfq_codel limit 10240 flows 1024 quantum 1514 target 5ms interval 100ms set_default

I forgot to add that there are quirks in which ethernet device to target for ingress shaping. The solution is also only for ethernet device only at the moment, but it should be enough for most real world use cases.

I have a simple read me doc here:

github.com

quarkysg/openwrt/blob/master-ipq806x-nss-qsdk11/package/qca/nss-ifb/README.md

NSS Physical Interface Ingress Driver
=====================================

This driver redirect NSS physical interface (namely GMACs) ingress traffic to itself
and sends it back to the Linux network stack (as the source GMACs packets) as it's
egress traffic.

This allows the NSS QDISC drivers to manage the egress traffic of this driver's
NSS virtual interface.

This driver will create a single network interface named 'nssifb'.  The default
source interface is defined as 'eth0'.  It can be changed using the following module
parameter path:

/sys/module/nss-ifb/parameter/nss_src_dev

To change the source NSS physical interface to 'eth1', use the following command:

printf eth1 > /sys/module/nss-ifb/parameter/nss_src_dev

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