#!/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.
# 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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¤ Dauer der Verarbeitung: 0.17 Sekunden
(vorverarbeitet am 2026-04-27)
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