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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_${TEST_NAME}" # 1 if fails exitcode=1 # Kselftest framework requirement - SKIP code is 4. ksft_skip=4 # # Static templates for performance, stressing and smoke tests. # Also it is possible to pass any supported parameters manualy. # PERF_PARAM="single_cpu_test=1 sequential_test_order=1 test_repeat_count=3" SMOKE_PARAM="single_cpu_test=1 test_loop_count=10000 test_repeat_count=10" STRESS_PARAM="test_repeat_count=20" check_test_requirements() { uid=$(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 we run" echo "all available test cases on all available CPUs 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 on all online CPUs" echo "./${DRIVER}.sh run_test_mask=1 test_repeat_count=5" echo echo -n "# Runs 4 tests(id_1|id_2|id_4|id_16) on one CPU with " echo "sequential order" echo -n "./${DRIVER}.sh single_cpu_test=1 sequential_test_order=1 " echo "run_test_mask=23" echo echo -n "# Runs all tests on all online CPUs, shuffled order, repeats " echo "20 times" echo "./${DRIVER}.sh test_repeat_count=20" echo echo "# Performance analysis" echo "./${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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