R7800 performance

Hardware Questions and Recommendations
54

I've tried to put together performance related tweaks:

  1. On-demand governor
# https://forum.openwrt.org/t/netgear-r7800-exploration-ipq8065-qca9984/285/1659                                                 
# https://forum.openwrt.org/t/netgear-r7800-exploration-ipq8065-qca9984/285/1661
#echo 800000 > /sys/devices/system/cpu/cpufreq/policy0/scaling_min_freq
#echo 800000 > /sys/devices/system/cpu/cpufreq/policy1/scaling_min_freq
#sleep 1
echo ondemand > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor
echo ondemand > /sys/devices/system/cpu/cpufreq/policy1/scaling_governor
# https://forum.lede-project.org/t/r7800-performance/15780/5
#echo 35 > /sys/devices/system/cpu/cpufreq/ondemand/up_threshold        
#echo 10 > /sys/devices/system/cpu/cpufreq/ondemand/sampling_down_factor
  1. Performance governor
# https://forum.openwrt.org/t/netgear-r7800-exploration-ipq8065-qca9984/285/1442
echo performance > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor
echo performance > /sys/devices/system/cpu/cpufreq/policy1/scaling_governor
echo 800000 > /sys/devices/system/cpu/cpufreq/policy0/scaling_max_freq
echo 800000 > /sys/devices/system/cpu/cpufreq/policy1/scaling_max_freq
sleep 1                                                                
echo 1725000 > /sys/devices/system/cpu/cpufreq/policy0/scaling_max_freq
echo 1725000 > /sys/devices/system/cpu/cpufreq/policy1/scaling_max_freq
  1. KONG changes
# https://www.desipro.de/openwrt/sources/startup
# https://forum.openwrt.org/t/r7800-cache-scaling-issue/44187/20
echo 800000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
echo 800000 > /sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq
echo 20 > /sys/devices/system/cpu/cpufreq/ondemand/up_threshold

#utilize both cpu cores for network processing
for file in /sys/class/net/*
do
	echo 3 > $file"/queues/rx-0/rps_cpus"
	echo 3 > $file"/queues/tx-0/xps_cpus"
done

Common

# https://gist.github.com/fantom-x/629fac1e82639979ae7fa02cb3c6d0b4

echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6
echo 1 > /proc/sys/net/ipv6/conf/default/disable_ipv6
echo 0 > /proc/sys/net/ipv6/conf/all/forwarding
echo 0 > /proc/sys/net/ipv6/conf/default/forwarding
/etc/init.d/odhcpd disable                           
/etc/init.d/odhcpd stop   

	# Disable SNMP MIBs on the switch
	swconfig dev switch0 set ar8xxx_mib_poll_interval 0

	# wifi0 - 5GHz                    
	echo 2 > /proc/irq/28/smp_affinity
	# wifi1 - 2GHz                    
	echo 1 > /proc/irq/29/smp_affinity
	# eth0 - WAN                      
	echo 1 > /proc/irq/31/smp_affinity
	# eth1 - LAN                      
	echo 2 > /proc/irq/32/smp_affinity

	# USB1 & USB2
	echo 2 > /proc/irq/105/smp_affinity
	echo 2 > /proc/irq/106/smp_affinity

	# These get lost after making any change via LuCI, so a reboot is required after every change
	ethtool -C eth0 tx-usecs 0
	ethtool -C eth1 tx-usecs 0 
	ethtool -C eth0 rx-usecs 31
	ethtool -C eth1 rx-usecs 31

	/etc/init.d/uhttpd restart                              
  
# There is no need for collectd to run above nice == 19
if [ ! `grep "NICEPRIO=19" /etc/init.d/collectd` ]; then
  sed -i 's/^NICEPRIO.*/NICEPRIO=19/g' /etc/init.d/collectd
  # Restart does not pick up the above change right away
  (sleep 300 ; /etc/init.d/collectd stop; sleep 15; /etc/init.d/collectd start) &
fi

# There is no need for uhttpd to run above nice == 19
if [ ! `grep "nice -n 19" /etc/init.d/uhttpd` ]; then
  sed -i "s/procd_set_param command/procd_set_param command nice -n 19/g" /etc/init.d/uhttpd
  # Restart does not pick up the above change right away
  (sleep 300 ; /etc/init.d/uhttpd stop; sleep 15; /etc/init.d/uhttpd start) &
fi

So far option with governor configured for performance seams to be in par with KONG changes (based on qualitative assessment). Does it make sense to combine those two? Any other ideas?