toolkit/func/core/pkg_sysstat/10-iostat.sh

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2021-07-05 06:50:25 +00:00
#!/bin/bash
r_log "sysstat" "Test basic iostat disk measurements"
TMPFILE=/var/tmp/iostat.disk
BLOCKS=4096
COUNT=10100
SUM="$(expr $BLOCKS \* $COUNT / 1024)"
DISK="$(fdisk -l | grep -Po -m1 '^/dev/[\D]+')"
[ -e $TMPFILE ] && /bin/rm -f $TMPFILE
# Clear out page cache
echo 1 > /proc/sys/vm/drop_caches
r_log "sysstat" "Running iostat on $DISK"
/usr/bin/iostat -dkx 1 5 $DISK > $TMPFILE &
# wait
sleep 4
# Generate traffic
/bin/dd if=$DISK of=/dev/null bs=$BLOCKS count=$COUNT &> /dev/null
# wait
sleep 6
READBYTES=$(awk '$6 ~ /[0-9]/ {NR>1 && sum+=$6} END {print int(sum)}' $TMPFILE)
[ "$READBYTES" -ge "$SUM" ] || { r_log "sysstat" "It doesn't look like we got a lot of traffic. Why?"; }
r_checkExitStatus $?