1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Resctrl tests 4 * 5 * Copyright (C) 2018 Intel Corporation 6 * 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 #define BENCHMARK_ARGS 64 14 #define BENCHMARK_ARG_SIZE 64 15 16 static int detect_vendor(void) 17 { 18 FILE *inf = fopen("/proc/cpuinfo", "r"); 19 int vendor_id = 0; 20 char *s = NULL; 21 char *res; 22 23 if (!inf) 24 return vendor_id; 25 26 res = fgrep(inf, "vendor_id"); 27 28 if (res) 29 s = strchr(res, ':'); 30 31 if (s && !strcmp(s, ": GenuineIntel\n")) 32 vendor_id = ARCH_INTEL; 33 else if (s && !strcmp(s, ": AuthenticAMD\n")) 34 vendor_id = ARCH_AMD; 35 36 fclose(inf); 37 free(res); 38 return vendor_id; 39 } 40 41 int get_vendor(void) 42 { 43 static int vendor = -1; 44 45 if (vendor == -1) 46 vendor = detect_vendor(); 47 if (vendor == 0) 48 ksft_print_msg("Can not get vendor info...\n"); 49 50 return vendor; 51 } 52 53 static void cmd_help(void) 54 { 55 printf("usage: resctrl_tests [-h] [-b \"benchmark_cmd [options]\"] [-t test list] [-n no_of_bits]\n"); 56 printf("\t-b benchmark_cmd [options]: run specified benchmark for MBM, MBA and CMT\n"); 57 printf("\t default benchmark is builtin fill_buf\n"); 58 printf("\t-t test list: run tests specified in the test list, "); 59 printf("e.g. -t mbm,mba,cmt,cat\n"); 60 printf("\t-n no_of_bits: run cache tests using specified no of bits in cache bit mask\n"); 61 printf("\t-p cpu_no: specify CPU number to run the test. 1 is default\n"); 62 printf("\t-h: help\n"); 63 } 64 65 void tests_cleanup(void) 66 { 67 mbm_test_cleanup(); 68 mba_test_cleanup(); 69 cmt_test_cleanup(); 70 cat_test_cleanup(); 71 } 72 73 static void run_mbm_test(bool has_ben, char **benchmark_cmd, int span, 74 int cpu_no, char *bw_report) 75 { 76 int res; 77 78 ksft_print_msg("Starting MBM BW change ...\n"); 79 80 if (!validate_resctrl_feature_request(MBM_STR) || (get_vendor() != ARCH_INTEL)) { 81 ksft_test_result_skip("Hardware does not support MBM or MBM is disabled\n"); 82 return; 83 } 84 85 if (!has_ben) 86 sprintf(benchmark_cmd[5], "%s", MBA_STR); 87 res = mbm_bw_change(span, cpu_no, bw_report, benchmark_cmd); 88 ksft_test_result(!res, "MBM: bw change\n"); 89 if ((get_vendor() == ARCH_INTEL) && res) 90 ksft_print_msg("Intel MBM may be inaccurate when Sub-NUMA Clustering is enabled. Check BIOS configuration.\n"); 91 } 92 93 static void run_mba_test(bool has_ben, char **benchmark_cmd, int span, 94 int cpu_no, char *bw_report) 95 { 96 int res; 97 98 ksft_print_msg("Starting MBA Schemata change ...\n"); 99 100 if (!validate_resctrl_feature_request(MBA_STR) || (get_vendor() != ARCH_INTEL)) { 101 ksft_test_result_skip("Hardware does not support MBA or MBA is disabled\n"); 102 return; 103 } 104 105 if (!has_ben) 106 sprintf(benchmark_cmd[1], "%d", span); 107 res = mba_schemata_change(cpu_no, bw_report, benchmark_cmd); 108 ksft_test_result(!res, "MBA: schemata change\n"); 109 } 110 111 static void run_cmt_test(bool has_ben, char **benchmark_cmd, int cpu_no) 112 { 113 int res; 114 115 ksft_print_msg("Starting CMT test ...\n"); 116 if (!validate_resctrl_feature_request(CMT_STR)) { 117 ksft_test_result_skip("Hardware does not support CMT or CMT is disabled\n"); 118 return; 119 } 120 121 if (!has_ben) 122 sprintf(benchmark_cmd[5], "%s", CMT_STR); 123 res = cmt_resctrl_val(cpu_no, 5, benchmark_cmd); 124 ksft_test_result(!res, "CMT: test\n"); 125 if ((get_vendor() == ARCH_INTEL) && res) 126 ksft_print_msg("Intel CMT may be inaccurate when Sub-NUMA Clustering is enabled. Check BIOS configuration.\n"); 127 } 128 129 static void run_cat_test(int cpu_no, int no_of_bits) 130 { 131 int res; 132 133 ksft_print_msg("Starting CAT test ...\n"); 134 135 if (!validate_resctrl_feature_request(CAT_STR)) { 136 ksft_test_result_skip("Hardware does not support CAT or CAT is disabled\n"); 137 return; 138 } 139 140 res = cat_perf_miss_val(cpu_no, no_of_bits, "L3"); 141 ksft_test_result(!res, "CAT: test\n"); 142 } 143 144 int main(int argc, char **argv) 145 { 146 bool has_ben = false, mbm_test = true, mba_test = true, cmt_test = true; 147 int c, cpu_no = 1, span = 250, argc_new = argc, i, no_of_bits = 0; 148 char *benchmark_cmd[BENCHMARK_ARGS], bw_report[64], bm_type[64]; 149 char benchmark_cmd_area[BENCHMARK_ARGS][BENCHMARK_ARG_SIZE]; 150 int ben_ind, ben_count, tests = 0; 151 bool cat_test = true; 152 153 for (i = 0; i < argc; i++) { 154 if (strcmp(argv[i], "-b") == 0) { 155 ben_ind = i + 1; 156 ben_count = argc - ben_ind; 157 argc_new = ben_ind - 1; 158 has_ben = true; 159 break; 160 } 161 } 162 163 while ((c = getopt(argc_new, argv, "ht:b:n:p:")) != -1) { 164 char *token; 165 166 switch (c) { 167 case 't': 168 token = strtok(optarg, ","); 169 170 mbm_test = false; 171 mba_test = false; 172 cmt_test = false; 173 cat_test = false; 174 while (token) { 175 if (!strncmp(token, MBM_STR, sizeof(MBM_STR))) { 176 mbm_test = true; 177 tests++; 178 } else if (!strncmp(token, MBA_STR, sizeof(MBA_STR))) { 179 mba_test = true; 180 tests++; 181 } else if (!strncmp(token, CMT_STR, sizeof(CMT_STR))) { 182 cmt_test = true; 183 tests++; 184 } else if (!strncmp(token, CAT_STR, sizeof(CAT_STR))) { 185 cat_test = true; 186 tests++; 187 } else { 188 printf("invalid argument\n"); 189 190 return -1; 191 } 192 token = strtok(NULL, ","); 193 } 194 break; 195 case 'p': 196 cpu_no = atoi(optarg); 197 break; 198 case 'n': 199 no_of_bits = atoi(optarg); 200 if (no_of_bits <= 0) { 201 printf("Bail out! invalid argument for no_of_bits\n"); 202 return -1; 203 } 204 break; 205 case 'h': 206 cmd_help(); 207 208 return 0; 209 default: 210 printf("invalid argument\n"); 211 212 return -1; 213 } 214 } 215 216 ksft_print_header(); 217 218 /* 219 * Typically we need root privileges, because: 220 * 1. We write to resctrl FS 221 * 2. We execute perf commands 222 */ 223 if (geteuid() != 0) 224 return ksft_exit_skip("Not running as root. Skipping...\n"); 225 226 if (has_ben) { 227 /* Extract benchmark command from command line. */ 228 for (i = ben_ind; i < argc; i++) { 229 benchmark_cmd[i - ben_ind] = benchmark_cmd_area[i]; 230 sprintf(benchmark_cmd[i - ben_ind], "%s", argv[i]); 231 } 232 benchmark_cmd[ben_count] = NULL; 233 } else { 234 /* If no benchmark is given by "-b" argument, use fill_buf. */ 235 for (i = 0; i < 6; i++) 236 benchmark_cmd[i] = benchmark_cmd_area[i]; 237 238 strcpy(benchmark_cmd[0], "fill_buf"); 239 sprintf(benchmark_cmd[1], "%d", span); 240 strcpy(benchmark_cmd[2], "1"); 241 strcpy(benchmark_cmd[3], "1"); 242 strcpy(benchmark_cmd[4], "0"); 243 strcpy(benchmark_cmd[5], ""); 244 benchmark_cmd[6] = NULL; 245 } 246 247 sprintf(bw_report, "reads"); 248 sprintf(bm_type, "fill_buf"); 249 250 if (!check_resctrlfs_support()) 251 return ksft_exit_skip("resctrl FS does not exist. Enable X86_CPU_RESCTRL config option.\n"); 252 253 filter_dmesg(); 254 255 ksft_set_plan(tests ? : 4); 256 257 if (mbm_test) 258 run_mbm_test(has_ben, benchmark_cmd, span, cpu_no, bw_report); 259 260 if (mba_test) 261 run_mba_test(has_ben, benchmark_cmd, span, cpu_no, bw_report); 262 263 if (cmt_test) 264 run_cmt_test(has_ben, benchmark_cmd, cpu_no); 265 266 if (cat_test) 267 run_cat_test(cpu_no, no_of_bits); 268 269 umount_resctrlfs(); 270 271 ksft_finished(); 272 } 273