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- #!/bin/bash
- #
- # This program is free software; you can redistribute it and/or
- # modify it under the terms of the GNU General Public
- # License as published by the Free Software Foundation; either
- # version 2 of the License, or (at your option) any later version.
- #
- # This program is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- # General Public License for more details.
- #
- # You should have received a copy of the GNU General Public
- # License along with this program; if not, write to the
- # Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- # Boston, MA 021110-1307, USA.
- #
- # Copyright (C) 2008 Andrea Righi <righi.andrea@gmail.com>
- #
- # Usage: ./run_io_throttle_test.sh
- # Description: test block device I/O bandwidth controller functionalities
- . ./myfunctions-io.sh
- trap cleanup SIGINT
- BUFSIZE=16m
- DATASIZE=64m
- setup
- # get the device name of the entire mounted block device
- dev=`df -P . | sed '1d' | cut -d' ' -f1 | sed 's/[p]*[0-9]*$//'`
- # evaluate device bandwidth
- export MYGROUP=
- phys_bw=`./iobw -direct 1 $BUFSIZE $DATASIZE | grep TOTAL | awk '{print $7}'`
- if [ $? -ne 0 ]; then
- echo "ERROR: could not evaluate i/o bandwidth of $dev. Exiting test."
- cleanup
- exit 1
- fi
- echo ">> physical i/o bandwidth limit is: $phys_bw KiB/s"
- # show cgroup i/o bandwidth limits
- for i in `seq 1 3`; do
- MYGROUP=cgroup-$i
- echo "($MYGROUP) max i/o bw: " \
- "$(($phys_bw / `echo 2^$i | bc`)) KiB/s + O_DIRECT"
- done
- for tasks in 1 2 4; do
- for strategy in 0 1; do
- # set bw limiting rules
- if [ -f /dev/blockioctl/blockio.bandwidth ]; then
- io_throttle_file=blockio.bandwidth
- elif [ -f /dev/blockioctl/blockio.bandwidth-max ]; then
- io_throttle_file=blockio.bandwidth-max
- else
- echo "ERROR: unknown kernel ABI. Exiting test."
- cleanup
- exit 1
- fi
- for i in `seq 1 3`; do
- limit=$(($phys_bw * 1024 / `echo 2^$i | bc`))
- IOBW[$i]=$(($limit / 1024))
- /bin/echo $dev:$limit:$strategy:$limit > \
- /dev/blockioctl/cgroup-$i/${io_throttle_file}
- if [ $? -ne 0 ]; then
- echo "ERROR: could not set i/o bandwidth limit for cgroup-$i. Exiting test."
- cleanup
- exit 1
- fi
- done
- # run benchmark
- if [ $tasks -eq 1 ]; then
- stream="stream"
- else
- stream="streams"
- fi
- echo -n ">> testing $tasks parallel $stream per cgroup "
- if [ $strategy -eq 0 ]; then
- echo "(leaky-bucket i/o throttling)"
- else
- echo "(token-bucket i/o throttling)"
- fi
- for i in `seq 1 3`; do
- MYGROUP=cgroup-$i
- /bin/echo $$ > /dev/blockioctl/$MYGROUP/tasks
- if [ $? -ne 0 ]; then
- echo "ERROR: could not set i/o bandwidth limit for cgroup-$i. Exiting test."
- cleanup
- exit 1
- fi
- # exec i/o benchmark
- ./iobw -direct $tasks $BUFSIZE $DATASIZE > /tmp/$MYGROUP.out &
- PID[$i]=$!
- done
- /bin/echo $$ > /dev/blockioctl/tasks
- # wait for children completion
- for i in `seq 1 3`; do
- MYGROUP=cgroup-$i
- wait ${PID[$i]}
- ret=$?
- if [ $ret -ne 0 ]; then
- echo "ERROR: error code $ret during test $tasks.$strategy.$i. Exiting test."
- cleanup
- exit 1
- fi
- iorate=`grep parent /tmp/${MYGROUP}.out | awk '{print $7}'`
- diff=$((${IOBW[$i]} - $iorate))
- echo "($MYGROUP) i/o-bw ${IOBW[$i]} KiB/s, i/o-rate $iorate KiB/s, err $diff KiB/s"
- if [ ${IOBW[$i]} -ge $iorate ]; then
- echo "TPASS Block device I/O bandwidth controller: test $tasks.$strategy.$i PASSED";
- else
- echo "TFAIL Block device I/O bandwidth controller: test $tasks.$strategy.$i FAILED";
- fi
- done
- done
- done
- cleanup
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