I added the kvm_stat support to ppc to watch my guest while executing e.g. to check
things like "what does my guest do when I see nothing" ;-)
To be able to do that I also needed a script that reports in a iostat/vmstat
like style, because of that I wrote a small shell script.
Additionally my colleague Christian Bornträger had the need for a top style
output and wrote a script for that need.
I attached both to help everyone experimenting with kvm_stat.
They are just small helpers and might still contain issues, feel free to
comment, correct, whatever ;-)
--
Grüsse / regards,
Christian Ehrhardt
IBM Linux Technology Center, Open Virtualization
#!/bin/bash
kvmstatdir="/sys/kernel/debug/kvm"
duration=2
summode="no"
lph=20
line=-1
if [ $summode = "no" ]
then
declare -a values
counter=0
for i in `ls $kvmstatdir`
do
values[$counter]=0
counter=`expr $counter + 1`
done
fi
kvmstat_header() {
for i in `ls $kvmstatdir`
do
printf "|%16s " $i
done
printf "|\n"
}
USAGE="Usage: `basename $0` [-d arg] [-l arg] [-hs]"
while getopts hvsd:l: OPT; do
case "$OPT" in
h) echo $USAGE
echo "d - sleep between reported lines"
echo "l - number of lines betweeen headers"
echo "s - summary mode (default is difference since last print)"
exit 0
;;
v) echo "`basename $0` version 0.1"
exit 0
;;
d) duration=$OPTARG
;;
l) lph=$OPTARG
;;
s) summode="yes"
;;
\?) # getopts issues an error message
echo $USAGE >&2
exit 1
;;
esac
done
while true
do
line=`expr $line + 1`
line=`expr $line % $lph`
if [ $line -eq "0" ]
then
kvmstat_header
fi
counter=0
for i in `ls $kvmstatdir`
do
val=`cat $kvmstatdir/$i`
if [ $summode = "no" ]
then
cval=$val;
val=`expr $cval - ${values[$counter]}`
values[$counter]=$cval
counter=`expr $counter + 1`
fi
printf "|%16d " $val
done
printf "|\n"
sleep $duration
done
#!/bin/bash
watch --differences -n 1 " kvmtop_once | sort -n -r"
#!/bin/bash
cd /sys/kernel/debug/kvm
for d in *
do
cat $d | tr -d \\n
echo -e :\\t $d
done
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