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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (C) 2018 Uladzislau Rezki (Sony) <urezki@gmail.com>
#
# This is a test script for the kernel test driver to analyse vmalloc
# allocator. Therefore it is just a kernel module loader. You can specify
# and pass different parameters in order to:
# a) analyse performance of vmalloc allocations;
# b) stressing and stability check of vmalloc subsystem.
TEST_NAME="vmalloc"
DRIVER="test_${TEST_NAME}"
NUM_CPUS=`grep -c ^processor /proc/cpuinfo`
# 1 if fails
exitcode=1
# Kselftest framework requirement - SKIP code is 4.
ksft_skip=4
#
# Static templates for performance, stressing and smoke tests.
# Also it is possible to pass any supported parameters manualy.
#
PERF_PARAM="sequential_test_order=1 test_repeat_count=3"
SMOKE_PARAM="test_loop_count=10000 test_repeat_count=10"
STRESS_PARAM="nr_threads=$NUM_CPUS test_repeat_count=20"
check_test_requirements()
{
uid=$(id -u)
if [ $uid -ne 0 ]; then
echo "$0: Must be run as root"
exit $ksft_skip
fi
if ! which modprobe > /dev/null 2>&1; then
echo "$0: You need modprobe installed"
exit $ksft_skip
fi
if ! modinfo $DRIVER > /dev/null 2>&1; then
echo "$0: You must have the following enabled in your kernel:"
echo "CONFIG_TEST_VMALLOC=m"
exit $ksft_skip
fi
}
run_perfformance_check()
{
echo "Run performance tests to evaluate how fast vmalloc allocation is."
echo "It runs all test cases on one single CPU with sequential order."
modprobe $DRIVER $PERF_PARAM > /dev/null 2>&1
echo "Done."
echo "Ccheck the kernel message buffer to see the summary."
}
run_stability_check()
{
echo "Run stability tests. In order to stress vmalloc subsystem all"
echo "available test cases are run by NUM_CPUS workers simultaneously."
echo "It will take time, so be patient."
modprobe $DRIVER $STRESS_PARAM > /dev/null 2>&1
echo "Done."
echo "Check the kernel ring buffer to see the summary."
}
run_smoke_check()
{
echo "Run smoke test. Note, this test provides basic coverage."
echo "Please check $0 output how it can be used"
echo "for deep performance analysis as well as stress testing."
modprobe $DRIVER $SMOKE_PARAM > /dev/null 2>&1
echo "Done."
echo "Check the kernel ring buffer to see the summary."
}
usage()
{
echo -n "Usage: $0 [ performance ] | [ stress ] | | [ smoke ] | "
echo "manual parameters"
echo
echo "Valid tests and parameters:"
echo
modinfo $DRIVER
echo
echo "Example usage:"
echo
echo "# Shows help message"
echo "./${DRIVER}.sh"
echo
echo "# Runs 1 test(id_1), repeats it 5 times by NUM_CPUS workers"
echo "./${DRIVER}.sh nr_threads=$NUM_CPUS run_test_mask=1 test_repeat_count=5"
echo
echo -n "# Runs 4 tests(id_1|id_2|id_4|id_16) on one CPU with "
echo "sequential order"
echo -n "./${DRIVER}.sh sequential_test_order=1 "
echo "run_test_mask=23"
echo
echo -n "# Runs all tests by NUM_CPUS workers, shuffled order, repeats "
echo "20 times"
echo "./${DRIVER}.sh nr_threads=$NUM_CPUS test_repeat_count=20"
echo
echo "# Performance analysis"
echo "./${DRIVER}.sh performance"
echo
echo "# Stress testing"
echo "./${DRIVER}.sh stress"
echo
exit 0
}
function validate_passed_args()
{
VALID_ARGS=`modinfo $DRIVER | awk '/parm:/ {print $2}' | sed 's/:.*//'`
#
# Something has been passed, check it.
#
for passed_arg in $@; do
key=${passed_arg//=*/}
val="${passed_arg:$((${#key}+1))}"
valid=0
for valid_arg in $VALID_ARGS; do
if [[ $key = $valid_arg ]] && [[ $val -gt 0 ]]; then
valid=1
break
fi
done
if [[ $valid -ne 1 ]]; then
echo "Error: key or value is not correct: ${key} $val"
exit $exitcode
fi
done
}
function run_manual_check()
{
#
# Validate passed parameters. If there is wrong one,
# the script exists and does not execute further.
#
validate_passed_args $@
echo "Run the test with following parameters: $@"
modprobe $DRIVER $@ > /dev/null 2>&1
echo "Done."
echo "Check the kernel ring buffer to see the summary."
}
function run_test()
{
if [ $# -eq 0 ]; then
usage
else
if [[ "$1" = "performance" ]]; then
run_perfformance_check
elif [[ "$1" = "stress" ]]; then
run_stability_check
elif [[ "$1" = "smoke" ]]; then
run_smoke_check
else
run_manual_check $@
fi
fi
}
check_test_requirements
run_test $@
exit 0
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