RX-DRP monitor

Kaspars_Zibarts — Fri, 19 Feb 2021 09:22:39 GMT

Whilst working on tuning our 23800 and 26000T performance issues I realised that couple of one-liners that are already available here in the community only provide cumulative statistics from time when counters were restarted and that might give inaccurate picture if some past event created RX drops that are not occurring anymore. So instead I wrote a script that evaluates "current" state by making two readings (set to 30mins apart but you can change it yourself) and then calculating drop rate based on diff

It's ugly as i had only 3 mins to write it but does the trick. Note it reads RX-DRP counter only!

source /etc/profile.d/CP.sh if [[ -e /etc/profile.d/vsenv.sh ]]; then source /etc/profile.d/vsenv.sh vsenv fi runme=true if [ ! -f rxdrop.curr ]; then touch rxdrop.curr; fi while $runme; do echo `date` mv rxdrop.curr rxdrop.prev netstat -ni | awk '{print $1" "$4" "$6}' | egrep "^bond|^eth" > rxdrop.curr while read line; do if_name=`echo "$line" | awk '{print $1}'` rx_tot_curr=`echo "$line" | awk '{print $2}'` rx_drp_curr=`echo "$line" | awk '{print $3}'` rx_tot_prev=`grep $if_name rxdrop.prev | awk '{print $2}'` rx_drp_prev=`grep $if_name rxdrop.prev | awk '{print $3}'` if [ ! $rx_tot_prev ]; then rx_tot_prev=0; fi if [ ! $rx_drp_prev ]; then rx_drp_prev=0; fi let diff_tot=rx_tot_curr-rx_tot_prev+1 let diff_drp=rx_drp_curr-rx_drp_prev rate=`echo 100*$diff_drp/$diff_tot | bc -l` echo "$if_name ${rate:0:5}%" | sed 's/ \./ 0./' done < rxdrop.curr echo sleep 1800 # time in seconds done

Re: RX-DRP monitor

Timothy_Hall — Thu, 22 Oct 2020 02:37:42 GMT

You can also use the expert mode command sar -n EDEV to see when network error counters were incremented for the last 30 days per interface, averaged out per second over 10-minute sampling periods:

Re: RX-DRP monitor

Kaspars_Zibarts — Wed, 21 Oct 2020 20:03:31 GMT

awesome! thanks heaps!

topic Re: RX-DRP monitor in General Topics

RX-DRP monitor

Re: RX-DRP monitor

Re: RX-DRP monitor