Optimization of network interface settings for the Sensor component

Follow these instructions if the application encounters network packet loss or performance issues when processing network traffic.

To reduce network packet loss and incomplete extraction of files from traffic:

1. Specify the maximum number of RSS queues:
   • If the data transfer rate on your network is less than 1 Gbps, set the number to 1.
   • If the data transfer rate on your network is greater than 1 Gbps, set the number to 16.

   If your network interface does not allow setting the maximum number of RSS queues to 16, set it to the maximum supported number.

2. Configure symmetric RSS hashing for the network interface. For details on configuring RSS hashing, refer to the vendor documentation of your network adapter.
3. Create an interrupts.sh file with the following content.

   #!/usr/bin/env bash

   set -e

   dev=$1
min_cpu=$2
max_cpu=$3
step=$4

   irs=($(cat /proc/interrupts | grep "$dev" | awk '{split($1,a,":"); print a[1]}'))

   cpu=$min_cpu
for ir in ${irs[@]}; do
echo $cpu > /proc/irq/$ir/smp_affinity_list
cpu=$(((cpu + step) % max_cpu))
cat "/proc/irq/$ir/smp_affinity_list"
done

4. Run the following command:

   sudo bash interrupts.sh <dev> <min_cpu> <max_cpu> <step>, where

   • <dev> is the network interface whose interrupts you want to distribute among cores.
   • <min_cpu> is the first core in the range for network adapter interrupt distribution.
   • <max_cpu> is the last core in the range for network adapter interrupt distribution.
   • <step>is the increment for picking the next core to assign to interrupts.

     Example: sudo bash interrupts.sh ens192 2 11 1

5. If you are using NVIDIA Mellanox network adapters (mlx4), configure the number of RSS queues and RSS hashing by running the following commands:

   ethtool -L $dev rx 16

   ethtool -X $dev equal 16

   ethtool -X $dev hfunc xor

6. If you are using Intel network adapters (i40e), configure the number of RSS queues and RSS hashing:

   rmmod i40e && modprobe i40e

   ifconfig $dev down

   ethtool -L $dev combined 16

   ethtool -K $dev rxhash on

   ethtool -K $dev ntuple on

   ifconfig $dev up

   ethtool -X $dev hkey 6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:

   5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A:6D:5A equal 16

   ethtool -A $dev rx off

   ethtool -C $dev adaptive-rx off adaptive-tx off rx-usecs 125

   ethtool -G $dev rx 1024

   ethtool -N $dev rx-flow-hash tcp4 sdfn

   ethtool -N $dev rx-flow-hash tcp6 sdfn

   ethtool -N $dev rx-flow-hash udp4 sdfn

   ethtool -N $dev rx-flow-hash udp6 sdfn

The network interfaces are configured.

After restarting the application, you must reconfigure the network interfaces following the instructions.

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