Here's the script that I used to measure the ping latency during RRUL,
Speedtest.net, and other bandwidth tests.
Note that this script works fine under the ash shell on CeroWrt if vis the
clean_up() function declaration as noted.
Enjoy!
Rich
==================================
#!/bin/sh
# pingstats.sh - Script to start pinging a host and
# produce summary of the response times after receiving a Ctl-C
# Usage: sh pingstats.sh [ host name/ip to ping ]
# If there is an option, it is treated as the name/address to ping
# Default is gstatic.com
# Copyright (c) 2014 - Rich Brown
# GPLv2
# Create temp file for ping results
PINGFILE=`mktemp /tmp/measurepings.XXXXXX` || exit 1
function clean_up { # called when Ctl-C is pressed
# clean_up() { # Use this line to declare the clean_up()
function in ash, the CeroWrt shell.
# Process the ping times, and summarize the results
# grep to keep lines that have "time=", then sed to isolate the time
stamps, and sort them
# awk builds an array of those values, and prints first & last (which
are min, max)
# and computes average and the median
grep "time=" < $PINGFILE | sed 's/^.*time=\([^ ]*\) ms/\1/' | sort -n | \
awk '{ arr[NR]=$1; sum+=$1; }END \
{ if (NR%2==1) med=arr[(NR+1)/2]; else
med=(arr[NR/2]+arr[NR/2+1])/2; \
pc10="-"; pc90="-"; \
if (NR>=10) { ix=int(NR/10); pc10=arr[ix];
ix=int(NR*9/10);pc90=arr[ix]; }; \
printf("\nMin: %4.3f 10pct: %4.3f Avg: %4.3f Median:
%4.3f 90pct: %4.3f Max: %4.3f Num pings: %d\n", arr[1], pc10, sum/NR, med,
pc90, arr[NR], NR ) }'
# Perform program exit housekeeping
# NB: Ctl-C stops the associated background ping job
rm $PINGFILE
exit
}
trap clean_up SIGHUP SIGINT SIGTERM
PINGHOST="gstatic.com"
if [ $# -ne 0 ]; then
PINGHOST=$1
fi
ping $PINGHOST > $PINGFILE &
echo "Pinging $PINGHOST... Press Ctl-C to summarize results "
wait
#! /bin/sh
# Take file of pings time readings, compute & display min/max/avg
# Found awk scripts on:
# http://blog.damiles.com/2008/10/awk-calculate-mean-min-and-max/
#
http://unix.stackexchange.com/questions/13731/is-there-a-way-to-get-the-min-max-median-and-average-of-a-list-of-numbers-in
# Found clean_up function on:
# http://linuxcommand.org/wss0160.php
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