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1// SPDX-License-Identifier: GPL-2.02/*3 * Resctrl tests4 *5 * Copyright (C) 2018 Intel Corporation6 *7 * Authors:8 * Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>,9 * Fenghua Yu <fenghua.yu@intel.com>10 */11#include "resctrl.h"12 13/* Volatile memory sink to prevent compiler optimizations */14static volatile int sink_target;15volatile int *value_sink = &sink_target;16 17static struct resctrl_test *resctrl_tests[] = {18 &mbm_test,19 &mba_test,20 &cmt_test,21 &l3_cat_test,22 &l3_noncont_cat_test,23 &l2_noncont_cat_test,24};25 26static int detect_vendor(void)27{28 FILE *inf = fopen("/proc/cpuinfo", "r");29 int vendor_id = 0;30 char *s = NULL;31 char *res;32 33 if (!inf)34 return vendor_id;35 36 res = fgrep(inf, "vendor_id");37 38 if (res)39 s = strchr(res, ':');40 41 if (s && !strcmp(s, ": GenuineIntel\n"))42 vendor_id = ARCH_INTEL;43 else if (s && !strcmp(s, ": AuthenticAMD\n"))44 vendor_id = ARCH_AMD;45 46 fclose(inf);47 free(res);48 return vendor_id;49}50 51int get_vendor(void)52{53 static int vendor = -1;54 55 if (vendor == -1)56 vendor = detect_vendor();57 if (vendor == 0)58 ksft_print_msg("Can not get vendor info...\n");59 60 return vendor;61}62 63static void cmd_help(void)64{65 int i;66 67 printf("usage: resctrl_tests [-h] [-t test list] [-n no_of_bits] [-b benchmark_cmd [option]...]\n");68 printf("\t-b benchmark_cmd [option]...: run specified benchmark for MBM, MBA and CMT\n");69 printf("\t default benchmark is builtin fill_buf\n");70 printf("\t-t test list: run tests/groups specified by the list, ");71 printf("e.g. -t mbm,mba,cmt,cat\n");72 printf("\t\tSupported tests (group):\n");73 for (i = 0; i < ARRAY_SIZE(resctrl_tests); i++) {74 if (resctrl_tests[i]->group)75 printf("\t\t\t%s (%s)\n", resctrl_tests[i]->name, resctrl_tests[i]->group);76 else77 printf("\t\t\t%s\n", resctrl_tests[i]->name);78 }79 printf("\t-n no_of_bits: run cache tests using specified no of bits in cache bit mask\n");80 printf("\t-p cpu_no: specify CPU number to run the test. 1 is default\n");81 printf("\t-h: help\n");82}83 84static int test_prepare(const struct resctrl_test *test)85{86 int res;87 88 res = signal_handler_register(test);89 if (res) {90 ksft_print_msg("Failed to register signal handler\n");91 return res;92 }93 94 res = mount_resctrlfs();95 if (res) {96 signal_handler_unregister();97 ksft_print_msg("Failed to mount resctrl FS\n");98 return res;99 }100 return 0;101}102 103static void test_cleanup(const struct resctrl_test *test)104{105 if (test->cleanup)106 test->cleanup();107 umount_resctrlfs();108 signal_handler_unregister();109}110 111static bool test_vendor_specific_check(const struct resctrl_test *test)112{113 if (!test->vendor_specific)114 return true;115 116 return get_vendor() & test->vendor_specific;117}118 119static void run_single_test(const struct resctrl_test *test, const struct user_params *uparams)120{121 int ret;122 123 if (test->disabled)124 return;125 126 if (!test_vendor_specific_check(test)) {127 ksft_test_result_skip("Hardware does not support %s\n", test->name);128 return;129 }130 131 ksft_print_msg("Starting %s test ...\n", test->name);132 133 if (test_prepare(test)) {134 ksft_exit_fail_msg("Abnormal failure when preparing for the test\n");135 return;136 }137 138 if (!test->feature_check(test)) {139 ksft_test_result_skip("Hardware does not support %s or %s is disabled\n",140 test->name, test->name);141 goto cleanup;142 }143 144 ret = test->run_test(test, uparams);145 ksft_test_result(!ret, "%s: test\n", test->name);146 147cleanup:148 test_cleanup(test);149}150 151static void init_user_params(struct user_params *uparams)152{153 memset(uparams, 0, sizeof(*uparams));154 155 uparams->cpu = 1;156 uparams->bits = 0;157}158 159int main(int argc, char **argv)160{161 int tests = ARRAY_SIZE(resctrl_tests);162 bool test_param_seen = false;163 struct user_params uparams;164 char *span_str = NULL;165 int ret, c, i;166 167 init_user_params(&uparams);168 169 while ((c = getopt(argc, argv, "ht:b:n:p:")) != -1) {170 char *token;171 172 switch (c) {173 case 'b':174 /*175 * First move optind back to the (first) optarg and176 * then build the benchmark command using the177 * remaining arguments.178 */179 optind--;180 if (argc - optind >= BENCHMARK_ARGS)181 ksft_exit_fail_msg("Too long benchmark command");182 183 /* Extract benchmark command from command line. */184 for (i = 0; i < argc - optind; i++)185 uparams.benchmark_cmd[i] = argv[i + optind];186 uparams.benchmark_cmd[i] = NULL;187 188 goto last_arg;189 case 't':190 token = strtok(optarg, ",");191 192 if (!test_param_seen) {193 for (i = 0; i < ARRAY_SIZE(resctrl_tests); i++)194 resctrl_tests[i]->disabled = true;195 tests = 0;196 test_param_seen = true;197 }198 while (token) {199 bool found = false;200 201 for (i = 0; i < ARRAY_SIZE(resctrl_tests); i++) {202 if (!strcasecmp(token, resctrl_tests[i]->name) ||203 (resctrl_tests[i]->group &&204 !strcasecmp(token, resctrl_tests[i]->group))) {205 if (resctrl_tests[i]->disabled)206 tests++;207 resctrl_tests[i]->disabled = false;208 found = true;209 }210 }211 212 if (!found) {213 printf("invalid test: %s\n", token);214 215 return -1;216 }217 token = strtok(NULL, ",");218 }219 break;220 case 'p':221 uparams.cpu = atoi(optarg);222 break;223 case 'n':224 uparams.bits = atoi(optarg);225 if (uparams.bits <= 0) {226 printf("Bail out! invalid argument for no_of_bits\n");227 return -1;228 }229 break;230 case 'h':231 cmd_help();232 233 return 0;234 default:235 printf("invalid argument\n");236 237 return -1;238 }239 }240last_arg:241 242 ksft_print_header();243 244 /*245 * Typically we need root privileges, because:246 * 1. We write to resctrl FS247 * 2. We execute perf commands248 */249 if (geteuid() != 0)250 ksft_exit_skip("Not running as root. Skipping...\n");251 252 if (!check_resctrlfs_support())253 ksft_exit_skip("resctrl FS does not exist. Enable X86_CPU_RESCTRL config option.\n");254 255 if (umount_resctrlfs())256 ksft_exit_skip("resctrl FS unmount failed.\n");257 258 filter_dmesg();259 260 if (!uparams.benchmark_cmd[0]) {261 /* If no benchmark is given by "-b" argument, use fill_buf. */262 uparams.benchmark_cmd[0] = "fill_buf";263 ret = asprintf(&span_str, "%u", DEFAULT_SPAN);264 if (ret < 0)265 ksft_exit_fail_msg("Out of memory!\n");266 uparams.benchmark_cmd[1] = span_str;267 uparams.benchmark_cmd[2] = "1";268 uparams.benchmark_cmd[3] = "0";269 uparams.benchmark_cmd[4] = "false";270 uparams.benchmark_cmd[5] = NULL;271 }272 273 ksft_set_plan(tests);274 275 for (i = 0; i < ARRAY_SIZE(resctrl_tests); i++)276 run_single_test(resctrl_tests[i], &uparams);277 278 free(span_str);279 ksft_finished();280}281