[LTP] [PATCH] rcu/rcu_torture.sh: Rewrite test
Alexey Kodanev
alexey.kodanev@oracle.com
Wed Jun 5 19:11:14 CEST 2019
Hi,
On 6/2/19 5:23 PM, Xiao Yang wrote:
> 1) Cleanup and convert to new API
> 2) Update rcutorture types(just rcu, srcu, srcud, tasks,
> busted and busted_srcud are supported currently)
>
> Note:
> 1) rcu, srcu, srcud and tasks expect SUCCESS
> 2) busted and busted_srcud expect FAILURE
>
It would be good to check that the kernel supports these new types before
the test-case starts, TCONF otherwise. For example, "busted_scrud" requires
4.19+.
I'm not sure if we need to run the busted* tests though... they are checking
the test itself? Besides, after they are loaded, we cannot unload rcutorture module?
> Signed-off-by: Xiao Yang <ice_yangxiao@163.com>
> ---
> testcases/kernel/device-drivers/rcu/rcu_torture.sh | 144 +++++++++------------
> 1 file changed, 63 insertions(+), 81 deletions(-)
>
> diff --git a/testcases/kernel/device-drivers/rcu/rcu_torture.sh b/testcases/kernel/device-drivers/rcu/rcu_torture.sh
> index c3739f9..56656ef 100755
> --- a/testcases/kernel/device-drivers/rcu/rcu_torture.sh
> +++ b/testcases/kernel/device-drivers/rcu/rcu_torture.sh
> @@ -1,20 +1,7 @@
> #!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0-or-later
> # Copyright (c) 2014-2015 Oracle and/or its affiliates. All Rights Reserved.
> -#
> -# 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 would 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 the Free Software Foundation,
> -# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
> -#
> +# Copyright (C) 2019 Xiao Yang <ice_yangxiao@163.com>
> # Author: Alexey Kodanev <alexey.kodanev@oracle.com>
> #
> # One of the possible ways to test RCU is to use rcutorture kernel module.
> @@ -23,89 +10,84 @@
> # dmesg output for module's test results.
> # For more information, please read Linux Documentation: RCU/torture.txt
>
> -TCID="rcu_torture"
> -TST_TOTAL=14
> -TST_CLEANUP=cleanup
> +TST_CNT=6
> +TST_SETUP=rcutorture_setup
> +TST_TESTFUNC=do_test
> +TST_NEEDS_ROOT=1
> +TST_NEEDS_CMDS="modprobe rmmod dmesg tac sed head"
TST_NEEDS_DRIVERS="rcutorture"?
> +TST_OPTS="t:w:"
> +TST_USAGE=rcutorture_usage
> +TST_PARSE_ARGS=rcutorture_parse_args
>
> -. test.sh
> +. tst_test.sh
>
> # default options
> -test_time=60
> +test_time=30
> num_writers=5
>
> -while getopts :ht:w: opt; do
> - case "$opt" in
> - h)
> - echo "Usage:"
> - echo "h help"
> - echo "t x time in seconds for each test-case"
> - echo "w x number of writers"
> - exit 0
> - ;;
> - t) test_time=$OPTARG ;;
> - w) num_writers=$OPTARG ;;
> - *)
> - tst_brkm TBROK "unknown option: $opt"
> - ;;
> - esac
> -done
> -
> -cleanup()
> +rcutorture_usage()
> {
> - tst_resm TINFO "cleanup"
> - rmmod rcutorture > /dev/null 2>&1
> + echo "Usage:"
> + echo "-t x time in seconds for each test-case"
> + echo "-w x number of writers"
> }
>
> -tst_require_root
> -
> -# check if module is present
> -modprobe rcutorture > /dev/null 2>&1 || \
> - tst_brkm TCONF "Test requires rcutorture module"
> -rmmod rcutorture > /dev/null 2>&1
> -
> -trap cleanup INT
> -
> -rcu_type="rcu rcu_bh srcu sched"
> -
> -if tst_kvcmp -lt "3.12"; then
> - rcu_type="$rcu_type rcu_sync rcu_expedited rcu_bh_sync rcu_bh_expedited \
> - srcu_sync srcu_expedited sched_sync sched_expedited"
> +rcutorture_parse_args()
> +{
> + case $1 in
> + t) test_time=$2 ;;
> + w) num_writers=$2 ;;
> + esac
> +}
>
> - if tst_kvcmp -lt "3.11"; then
> - rcu_type="$rcu_type srcu_raw srcu_raw_sync"
> - fi
> -fi
> +rcutorture_setup()
> +{
> + # do test by insert and remove rcutorture module so
> + # check that it is not built-in or loaded
> + modprobe -n --first-time rcutorture >/dev/null 2>&1 || \
> + tst_brk TCONF "built-in or loaded rcutorture"
> +}
>
> -TST_TOTAL=$(echo "$rcu_type" | wc -w)
> +rcutorture_test()
> +{
> + local rcu_type=$1
> + local exp_res=$2
>
> -est_time=`echo "scale=2; $test_time * $TST_TOTAL / 60 " | bc`
> -tst_resm TINFO "estimate time $est_time min"
> + tst_res TINFO "${rcu_type}-torture: running ${test_time} sec..."
>
> -for type in $rcu_type; do
> + modprobe rcutorture nfakewriters=${num_writers} torture_type=${rcu_type} \
> + >/dev/null 2>&1 || tst_brk TBROK "failed to load module"
>
> - tst_resm TINFO "$type: running $test_time sec..."
> + sleep ${test_time}
>
> - modprobe rcutorture nfakewriters=$num_writers \
> - stat_interval=60 test_no_idle_hz=1 shuffle_interval=3 \
> - stutter=5 irqreader=1 fqs_duration=0 fqs_holdoff=0 \
> - fqs_stutter=3 test_boost=1 test_boost_interval=7 \
> - test_boost_duration=4 shutdown_secs=0 \
> - stall_cpu=0 stall_cpu_holdoff=10 n_barrier_cbs=0 \
> - onoff_interval=0 onoff_holdoff=0 torture_type=$type \
> - > /dev/null 2>&1 || tst_brkm TBROK "failed to load module"
> + rmmod rcutorture >/dev/null 2>&1 || \
> + tst_brk TBROK "failed to unload module"
>
> - sleep $test_time
> + # check module status in dmesg
> + local output=$(dmesg | tac | grep " ${rcu_type}-torture:.* End of test" | head -n1)
> + [ -z "$output" ] && tst_brk TBROK "${rcu_type}: incompleted"
>
> - rmmod rcutorture > /dev/null 2>&1 || \
> - tst_brkm TBROK "failed to unload module"
> + mod_parms=$(echo "$output" | sed -nE 's/.* End of test: .*: (.*)/\1/p')
> + tst_res TINFO "${rcu_type}-torture with ${mod_parms}"
>
> - # check module status in dmesg
> - result_str=`dmesg | sed -nE '$s/.*End of test: ([A-Z]+):.*/\1/p'`
> - if [ "$result_str" = "SUCCESS" ]; then
> - tst_resm TPASS "$type: completed"
> + act_res=$(echo "$output" | sed -nE 's/.* End of test: (.*): .*/\1/p')
> + if [ "${act_res}" = "${exp_res}" ]; then
> + tst_res TPASS "${rcu_type}-torture: ${act_res}"
> else
> - tst_resm TFAIL "$type: $result_str, see dmesg"
> + tst_res TFAIL "${rcu_type}-torture: ${act_res}, see dmesg"
> fi
> -done
> +}
> +
> +do_test()
> +{
> + case $1 in
> + 1) rcutorture_test rcu SUCCESS;;
> + 2) rcutorture_test srcu SUCCESS;;
> + 3) rcutorture_test srcud SUCCESS;;
> + 4) rcutorture_test tasks SUCCESS;;
> + 5) rcutorture_test busted FAILURE;;
> + 6) rcutorture_test busted_srcud FAILURE;;
> + esac
> +}
>
> -tst_exit
> +tst_run
>
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