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Factor out summarize_pings();
Display summary even after Ctl-C; Add some test code for the awk summarize_pings() function.
This commit is contained in:
Rich Brown
parent
4b021acb31
commit
eac7700c14
4 changed files with 178 additions and 47 deletions
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@ -18,49 +18,11 @@
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# -i | --idle: Don't send traffic, only measure idle latency
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# -n | --number: Number of simultaneous sessions (default - 5 sessions)
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# Copyright (c) 2014-2019 - Rich Brown rich.brown@blueberryhillsoftware.com
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# Copyright (c) 2014-2022 - Rich Brown rich.brown@blueberryhillsoftware.com
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# GPLv2
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# Summarize the contents of the ping's output file to show min, avg, median, max, etc.
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# input parameter ($1) file contains the output of the ping command
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summarize_pings() {
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# Process the ping times, and summarize the results
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# grep to keep lines that have "time=", then sed to isolate the time stamps, and sort them
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# awk builds an array of those values, and prints first & last (which are min, max)
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# and computes average.
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# If the number of samples is >= 10, also computes median, and 10th and 90th percentile readings
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# stop pinging and drawing dots
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kill_pings
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kill_dots
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sed 's/^.*time=\([^ ]*\) ms/\1/' < "$1" | grep -v "PING" | sort -n | \
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awk 'BEGIN {numdrops=0; numrows=0;} \
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{ \
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if ( $0 ~ /timeout/ ) { \
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numdrops += 1; \
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} else { \
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numrows += 1; \
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arr[numrows]=$1; sum+=$1; \
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} \
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} \
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END { \
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pc10="-"; pc90="-"; med="-"; \
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if (numrows == 0) {numrows=1} \
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if (numrows>=10) \
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{ ix=int(numrows/10); pc10=arr[ix]; ix=int(numrows*9/10);pc90=arr[ix]; \
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if (numrows%2==1) med=arr[(numrows+1)/2]; else med=(arr[numrows/2]); \
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}; \
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pktloss = numdrops/(numdrops+numrows) * 100; \
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printf("\n Latency: (in msec, %d pings, %4.2f%% packet loss)\n Min: %4.3f \n 10pct: %4.3f \n Median: %4.3f \n Avg: %4.3f \n 90pct: %4.3f \n Max: %4.3f\n", numrows, pktloss, arr[1], pc10, med, sum/numrows, pc90, arr[numrows] )\
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}'
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# and finally remove the PINGFILE
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rm "$1"
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}
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# include the summarize_pings() function from the lib directory
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. "./lib/summarize_pings.sh"
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# Print a line of dots as a progress indicator.
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@ -89,12 +51,22 @@ kill_pings() {
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ping_pid=0
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}
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# Clean up all the debris from the testing
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clean_up() {
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kill_pings
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kill_dots
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rm "$PINGFILE"
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}
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# Stop the current pings and dots, and exit
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# ping command catches (and handles) first Ctrl-C, so you have to hit it again...
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kill_pings_and_dots_and_exit() {
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kill_dots
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kill_pings
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catch_interrupt() {
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printf "\nStopped"
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kill_pings
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kill_dots
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summarize_pings "$PINGFILE"
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rm "$PINGFILE"
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exit 1
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}
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@ -169,7 +141,8 @@ measure_direction() {
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# When netperf completes, summarize the ping data
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summarize_pings "$PINGFILE"
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rm "$SPEEDFILE"
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# stop the dots & pings, rm "$PINGFILE"
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clean_up
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}
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# ------- Start of the main routine --------
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@ -240,8 +213,8 @@ else
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fi
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DATE=$(date "+%Y-%m-%d %H:%M:%S")
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# Catch a Ctl-C and stop the pinging and the print_dots
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trap kill_pings_and_dots_and_exit HUP INT TERM
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# Catch a Ctl-C and close up
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trap catch_interrupt HUP INT TERM
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if $IDLETEST
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then
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@ -249,6 +222,7 @@ then
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start_pings
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sleep "$TESTDUR"
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summarize_pings "$PINGFILE"
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clean_up
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else
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echo "$DATE Testing against $TESTHOST ($PROTO) with $MAXSESSIONS simultaneous sessions while pinging $PINGHOST ($TESTDUR seconds in each direction)"
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46
lib/summarize_pings.sh
Normal file
46
lib/summarize_pings.sh
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@ -0,0 +1,46 @@
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summarize_pings() {
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# Process the ping times from the passed-in file, and summarize the results
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# grep to keep lines that have "time=", then sed to isolate the time stamps, and sort them
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# Use awk to build an array of those values, and print first & last (which are min, max)
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# and compute average.
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# If the number of samples is >= 10, also compute median, and 10th and 90th percentile readings
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# Display the values as:
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# Latency: (in msec, 11 pings, 8.33% packet loss)
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# Min: 16.556
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# 10pct: 16.561
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# Median: 22.370
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# Avg: 21.203
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# 90pct: 23.202
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# Max: 23.394
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grep "time" < "$1" | cat | \
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sed 's/^.*time=\([^ ]*\) ms/\1/'| \
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# tee >&2 | \
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sort -n | \
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awk 'BEGIN {numdrops=0; numrows=0} \
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{ \
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# print ; \
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if ( $0 ~ /timeout/ ) { \
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numdrops += 1; \
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} else { \
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numrows += 1; \
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arr[numrows]=$1; sum+=$1; \
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} \
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} \
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END { \
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pc10="-"; pc90="-"; med="-"; \
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if (numrows == 0) {numrows=1} \
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if (numrows>=10) \
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{ # get the 10th pctile - never the first one
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ix=int(numrows/10); if (ix=1) {ix+=1}; pc10=arr[ix]; \
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# get the 90th pctile
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ix=int(numrows*9/10);pc90=arr[ix]; \
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# get the median
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if (numrows%2==1) med=arr[(numrows+1)/2]; else med=(arr[numrows/2]); \
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}; \
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pktloss = numdrops/(numdrops+numrows) * 100; \
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printf("\n Latency: (in msec, %d pings, %4.2f%% packet loss)\n Min: %4.3f \n 10pct: %4.3f \n Median: %4.3f \n Avg: %4.3f \n 90pct: %4.3f \n Max: %4.3f\n", numrows, pktloss, arr[1], pc10, med, sum/numrows, pc90, arr[numrows] )\
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}'
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}
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88
tests/pingsamples.txt
Normal file
88
tests/pingsamples.txt
Normal file
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@ -0,0 +1,88 @@
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PING 1.1.1.1 (1.1.1.1): 56 data bytes
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64 bytes from 1.1.1.1: icmp_seq=0 ttl=55 time=22.370 ms
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64 bytes from 1.1.1.1: icmp_seq=1 ttl=55 time=22.639 ms
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64 bytes from 1.1.1.1: icmp_seq=2 ttl=55 time=23.202 ms
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64 bytes from 1.1.1.1: icmp_seq=3 ttl=55 time=16.561 ms
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64 bytes from 1.1.1.1: icmp_seq=4 ttl=55 time=23.394 ms
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64 bytes from 1.1.1.1: icmp_seq=5 ttl=55 time=22.348 ms
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64 bytes from 1.1.1.1: icmp_seq=6 ttl=55 time=23.250 ms
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64 bytes from 1.1.1.1: icmp_seq=7 ttl=55 time=16.556 ms
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Request timeout for icmp_seq 8
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64 bytes from 1.1.1.1: icmp_seq=9 ttl=55 time=22.247 ms
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64 bytes from 1.1.1.1: icmp_seq=10 ttl=55 time=17.617 ms
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64 bytes from 1.1.1.1: icmp_seq=11 ttl=55 time=23.049 ms
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64 bytes from 1.1.1.1: icmp_seq=12 ttl=55 time=16.619 ms
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64 bytes from 1.1.1.1: icmp_seq=13 ttl=55 time=22.737 ms
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64 bytes from 1.1.1.1: icmp_seq=14 ttl=55 time=22.806 ms
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64 bytes from 1.1.1.1: icmp_seq=15 ttl=55 time=22.971 ms
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64 bytes from 1.1.1.1: icmp_seq=16 ttl=55 time=16.498 ms
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64 bytes from 1.1.1.1: icmp_seq=17 ttl=55 time=23.385 ms
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64 bytes from 1.1.1.1: icmp_seq=18 ttl=55 time=22.898 ms
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64 bytes from 1.1.1.1: icmp_seq=19 ttl=55 time=22.988 ms
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64 bytes from 1.1.1.1: icmp_seq=20 ttl=55 time=23.051 ms
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64 bytes from 1.1.1.1: icmp_seq=21 ttl=55 time=16.487 ms
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64 bytes from 1.1.1.1: icmp_seq=22 ttl=55 time=16.692 ms
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64 bytes from 1.1.1.1: icmp_seq=23 ttl=55 time=15.711 ms
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64 bytes from 1.1.1.1: icmp_seq=24 ttl=55 time=17.799 ms
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64 bytes from 1.1.1.1: icmp_seq=25 ttl=55 time=23.230 ms
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64 bytes from 1.1.1.1: icmp_seq=26 ttl=55 time=22.493 ms
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64 bytes from 1.1.1.1: icmp_seq=27 ttl=55 time=23.209 ms
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64 bytes from 1.1.1.1: icmp_seq=28 ttl=55 time=22.708 ms
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64 bytes from 1.1.1.1: icmp_seq=29 ttl=55 time=22.146 ms
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64 bytes from 1.1.1.1: icmp_seq=30 ttl=55 time=22.887 ms
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64 bytes from 1.1.1.1: icmp_seq=31 ttl=55 time=23.119 ms
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64 bytes from 1.1.1.1: icmp_seq=32 ttl=55 time=23.049 ms
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64 bytes from 1.1.1.1: icmp_seq=33 ttl=55 time=17.061 ms
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64 bytes from 1.1.1.1: icmp_seq=34 ttl=55 time=23.603 ms
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64 bytes from 1.1.1.1: icmp_seq=35 ttl=55 time=16.382 ms
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64 bytes from 1.1.1.1: icmp_seq=36 ttl=55 time=23.197 ms
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64 bytes from 1.1.1.1: icmp_seq=37 ttl=55 time=17.043 ms
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64 bytes from 1.1.1.1: icmp_seq=38 ttl=55 time=25.956 ms
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64 bytes from 1.1.1.1: icmp_seq=39 ttl=55 time=23.118 ms
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64 bytes from 1.1.1.1: icmp_seq=40 ttl=55 time=23.350 ms
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64 bytes from 1.1.1.1: icmp_seq=41 ttl=55 time=23.614 ms
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64 bytes from 1.1.1.1: icmp_seq=42 ttl=55 time=16.343 ms
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64 bytes from 1.1.1.1: icmp_seq=43 ttl=55 time=28.280 ms
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64 bytes from 1.1.1.1: icmp_seq=44 ttl=55 time=23.024 ms
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64 bytes from 1.1.1.1: icmp_seq=45 ttl=55 time=22.868 ms
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64 bytes from 1.1.1.1: icmp_seq=46 ttl=55 time=16.664 ms
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64 bytes from 1.1.1.1: icmp_seq=47 ttl=55 time=22.922 ms
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64 bytes from 1.1.1.1: icmp_seq=48 ttl=55 time=23.331 ms
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64 bytes from 1.1.1.1: icmp_seq=49 ttl=55 time=23.770 ms
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64 bytes from 1.1.1.1: icmp_seq=50 ttl=55 time=22.904 ms
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64 bytes from 1.1.1.1: icmp_seq=51 ttl=55 time=23.393 ms
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64 bytes from 1.1.1.1: icmp_seq=52 ttl=55 time=22.398 ms
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64 bytes from 1.1.1.1: icmp_seq=53 ttl=55 time=18.838 ms
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64 bytes from 1.1.1.1: icmp_seq=54 ttl=55 time=17.159 ms
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64 bytes from 1.1.1.1: icmp_seq=55 ttl=55 time=23.008 ms
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64 bytes from 1.1.1.1: icmp_seq=56 ttl=55 time=23.543 ms
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64 bytes from 1.1.1.1: icmp_seq=57 ttl=55 time=16.356 ms
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64 bytes from 1.1.1.1: icmp_seq=58 ttl=55 time=16.766 ms
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64 bytes from 1.1.1.1: icmp_seq=59 ttl=55 time=22.899 ms
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64 bytes from 1.1.1.1: icmp_seq=60 ttl=55 time=23.018 ms
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64 bytes from 1.1.1.1: icmp_seq=61 ttl=55 time=16.107 ms
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64 bytes from 1.1.1.1: icmp_seq=62 ttl=55 time=23.279 ms
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64 bytes from 1.1.1.1: icmp_seq=63 ttl=55 time=17.151 ms
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64 bytes from 1.1.1.1: icmp_seq=64 ttl=55 time=16.751 ms
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64 bytes from 1.1.1.1: icmp_seq=65 ttl=55 time=23.201 ms
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64 bytes from 1.1.1.1: icmp_seq=66 ttl=55 time=23.518 ms
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64 bytes from 1.1.1.1: icmp_seq=67 ttl=55 time=23.008 ms
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64 bytes from 1.1.1.1: icmp_seq=68 ttl=55 time=23.239 ms
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64 bytes from 1.1.1.1: icmp_seq=69 ttl=55 time=22.914 ms
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64 bytes from 1.1.1.1: icmp_seq=70 ttl=55 time=17.153 ms
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64 bytes from 1.1.1.1: icmp_seq=71 ttl=55 time=22.090 ms
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64 bytes from 1.1.1.1: icmp_seq=72 ttl=55 time=23.510 ms
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64 bytes from 1.1.1.1: icmp_seq=73 ttl=55 time=23.084 ms
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64 bytes from 1.1.1.1: icmp_seq=74 ttl=55 time=22.768 ms
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64 bytes from 1.1.1.1: icmp_seq=75 ttl=55 time=22.237 ms
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64 bytes from 1.1.1.1: icmp_seq=76 ttl=55 time=23.340 ms
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64 bytes from 1.1.1.1: icmp_seq=77 ttl=55 time=16.883 ms
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64 bytes from 1.1.1.1: icmp_seq=78 ttl=55 time=23.954 ms
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64 bytes from 1.1.1.1: icmp_seq=79 ttl=55 time=23.415 ms
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64 bytes from 1.1.1.1: icmp_seq=80 ttl=55 time=16.897 ms
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64 bytes from 1.1.1.1: icmp_seq=81 ttl=55 time=18.440 ms
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64 bytes from 1.1.1.1: icmp_seq=82 ttl=55 time=20.889 ms
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--- 1.1.1.1 ping statistics ---
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83 packets transmitted, 83 packets received, 0.0% packet loss
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round-trip min/avg/max/stddev = 15.711/21.256/28.280/2.984 ms
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23
tests/test_summary.sh
Normal file
23
tests/test_summary.sh
Normal file
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@ -0,0 +1,23 @@
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# Test scaffolding for the summarize_pings() subroutine.
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# Take a known set of ping readings (in ./pingsamples.txt), strip out bogus stuff,
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# then pass the first N lines (passed in as an argument) to the summarize_pings() function
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#
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# include the summarize_pings() function from the library
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. "../lib/summarize_pings.sh"
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PINGFILE=$(mktemp /tmp/measurepings.XXXXXX) || exit 1
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# pre-format the pingsamples for ease of counting...
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# strip out any line that doesn't contain "time" (e.g., not time= or timeout)
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# Only send the specified number of lines into $PINGFILE
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cat < pingsamples.txt | \
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grep time | \
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head -n "$1" > "$PINGFILE"
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echo "=== PINGFILE ==="
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cat "$PINGFILE"
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echo "========"
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summarize_pings "$PINGFILE"
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rm "$PINGFILE"
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