Simple script to measure cpu load with perf whilst running a bandwidth limited VM network test

gistfile1.txt

#!/bin/bash

# Very simple test script to see if we can measure 'cpu utilisation' stably whilst running a bandwidth limited
# network test - across two VM containers.

#set -x

RUNTIME=kata-runtime

C1NAME=fred
C2NAME=john

BANDWIDTH="1G"
TIMEOUT="70"
SAMPLE_PERIOD=60

CONTAINER="gabyct/network"
C1CMD="export TMPDIR=/dev/shm; iperf3 -s"

# use func call to delay var expansion
fillcmd2() {
        C2CMD="export TMPDIR=/dev/shm; iperf3 -c $server_address -b $BANDWIDTH -t $TIMEOUT"
}

docker stop $C1NAME $C2NAME
docker rm $C1NAME $C2NAME

docker run --runtime $RUNTIME --name $C1NAME -d $CONTAINER bash -c "$C1CMD"

server_address=$(docker inspect --format "{{.NetworkSettings.IPAddress}}" $C1NAME)

fillcmd2
docker run --runtime $RUNTIME --name $C2NAME -d $CONTAINER bash -c "$C2CMD"
docker ps

# let things get going
sleep 5
PIDS="$(pgrep -d ',' qemu)"
#PIDARGS="$(echo " ${PIDS}" | sed 's/ / -p /g')"
sudo perf stat -x, -e cycles -e instructions -p ${PIDS} sleep ${SAMPLE_PERIOD}
#sudo perf stat -p ${PIDS} sleep ${SAMPLE_PERIOD}

docker stop $C1NAME $C2NAME
docker rm $C1NAME $C2NAME