1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3# 4# Copyright (C) 2018 Uladzislau Rezki (Sony) <urezki@gmail.com> 5# 6# This is a test script for the kernel test driver to analyse vmalloc 7# allocator. Therefore it is just a kernel module loader. You can specify 8# and pass different parameters in order to: 9# a) analyse performance of vmalloc allocations; 10# b) stressing and stability check of vmalloc subsystem. 11 12TEST_NAME="vmalloc" 13DRIVER="test_${TEST_NAME}" 14NUM_CPUS=`grep -c ^processor /proc/cpuinfo` 15 16# 1 if fails 17exitcode=1 18 19# Kselftest framework requirement - SKIP code is 4. 20ksft_skip=4 21 22# 23# Static templates for performance, stressing and smoke tests. 24# Also it is possible to pass any supported parameters manualy. 25# 26PERF_PARAM="sequential_test_order=1 test_repeat_count=3" 27SMOKE_PARAM="test_loop_count=10000 test_repeat_count=10" 28STRESS_PARAM="nr_threads=$NUM_CPUS test_repeat_count=20" 29 30check_test_requirements() 31{ 32 uid=$(id -u) 33 if [ $uid -ne 0 ]; then 34 echo "$0: Must be run as root" 35 exit $ksft_skip 36 fi 37 38 if ! which modprobe > /dev/null 2>&1; then 39 echo "$0: You need modprobe installed" 40 exit $ksft_skip 41 fi 42 43 if ! modinfo $DRIVER > /dev/null 2>&1; then 44 echo "$0: You must have the following enabled in your kernel:" 45 echo "CONFIG_TEST_VMALLOC=m" 46 exit $ksft_skip 47 fi 48} 49 50run_perfformance_check() 51{ 52 echo "Run performance tests to evaluate how fast vmalloc allocation is." 53 echo "It runs all test cases on one single CPU with sequential order." 54 55 modprobe $DRIVER $PERF_PARAM > /dev/null 2>&1 56 echo "Done." 57 echo "Ccheck the kernel message buffer to see the summary." 58} 59 60run_stability_check() 61{ 62 echo "Run stability tests. In order to stress vmalloc subsystem all" 63 echo "available test cases are run by NUM_CPUS workers simultaneously." 64 echo "It will take time, so be patient." 65 66 modprobe $DRIVER $STRESS_PARAM > /dev/null 2>&1 67 echo "Done." 68 echo "Check the kernel ring buffer to see the summary." 69} 70 71run_smoke_check() 72{ 73 echo "Run smoke test. Note, this test provides basic coverage." 74 echo "Please check $0 output how it can be used" 75 echo "for deep performance analysis as well as stress testing." 76 77 modprobe $DRIVER $SMOKE_PARAM > /dev/null 2>&1 78 echo "Done." 79 echo "Check the kernel ring buffer to see the summary." 80} 81 82usage() 83{ 84 echo -n "Usage: $0 [ performance ] | [ stress ] | | [ smoke ] | " 85 echo "manual parameters" 86 echo 87 echo "Valid tests and parameters:" 88 echo 89 modinfo $DRIVER 90 echo 91 echo "Example usage:" 92 echo 93 echo "# Shows help message" 94 echo "./${DRIVER}.sh" 95 echo 96 echo "# Runs 1 test(id_1), repeats it 5 times by NUM_CPUS workers" 97 echo "./${DRIVER}.sh nr_threads=$NUM_CPUS run_test_mask=1 test_repeat_count=5" 98 echo 99 echo -n "# Runs 4 tests(id_1|id_2|id_4|id_16) on one CPU with " 100 echo "sequential order" 101 echo -n "./${DRIVER}.sh sequential_test_order=1 " 102 echo "run_test_mask=23" 103 echo 104 echo -n "# Runs all tests by NUM_CPUS workers, shuffled order, repeats " 105 echo "20 times" 106 echo "./${DRIVER}.sh nr_threads=$NUM_CPUS test_repeat_count=20" 107 echo 108 echo "# Performance analysis" 109 echo "./${DRIVER}.sh performance" 110 echo 111 echo "# Stress testing" 112 echo "./${DRIVER}.sh stress" 113 echo 114 exit 0 115} 116 117function validate_passed_args() 118{ 119 VALID_ARGS=`modinfo $DRIVER | awk '/parm:/ {print $2}' | sed 's/:.*//'` 120 121 # 122 # Something has been passed, check it. 123 # 124 for passed_arg in $@; do 125 key=${passed_arg//=*/} 126 val="${passed_arg:$((${#key}+1))}" 127 valid=0 128 129 for valid_arg in $VALID_ARGS; do 130 if [[ $key = $valid_arg ]] && [[ $val -gt 0 ]]; then 131 valid=1 132 break 133 fi 134 done 135 136 if [[ $valid -ne 1 ]]; then 137 echo "Error: key or value is not correct: ${key} $val" 138 exit $exitcode 139 fi 140 done 141} 142 143function run_manual_check() 144{ 145 # 146 # Validate passed parameters. If there is wrong one, 147 # the script exists and does not execute further. 148 # 149 validate_passed_args $@ 150 151 echo "Run the test with following parameters: $@" 152 modprobe $DRIVER $@ > /dev/null 2>&1 153 echo "Done." 154 echo "Check the kernel ring buffer to see the summary." 155} 156 157function run_test() 158{ 159 if [ $# -eq 0 ]; then 160 usage 161 else 162 if [[ "$1" = "performance" ]]; then 163 run_perfformance_check 164 elif [[ "$1" = "stress" ]]; then 165 run_stability_check 166 elif [[ "$1" = "smoke" ]]; then 167 run_smoke_check 168 else 169 run_manual_check $@ 170 fi 171 fi 172} 173 174check_test_requirements 175run_test $@ 176 177exit 0 178