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)) { 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 mbm_test_cleanup(); 92 } 93 94 static void run_mba_test(bool has_ben, char **benchmark_cmd, int span, 95 int cpu_no, char *bw_report) 96 { 97 int res; 98 99 ksft_print_msg("Starting MBA Schemata change ...\n"); 100 101 if (!validate_resctrl_feature_request(MBA_STR)) { 102 ksft_test_result_skip("Hardware does not support MBA or MBA is disabled\n"); 103 return; 104 } 105 106 if (!has_ben) 107 sprintf(benchmark_cmd[1], "%d", span); 108 res = mba_schemata_change(cpu_no, bw_report, benchmark_cmd); 109 ksft_test_result(!res, "MBA: schemata change\n"); 110 mba_test_cleanup(); 111 } 112 113 static void run_cmt_test(bool has_ben, char **benchmark_cmd, int cpu_no) 114 { 115 int res; 116 117 ksft_print_msg("Starting CMT test ...\n"); 118 if (!validate_resctrl_feature_request(CMT_STR)) { 119 ksft_test_result_skip("Hardware does not support CMT or CMT is disabled\n"); 120 return; 121 } 122 123 if (!has_ben) 124 sprintf(benchmark_cmd[5], "%s", CMT_STR); 125 res = cmt_resctrl_val(cpu_no, 5, benchmark_cmd); 126 ksft_test_result(!res, "CMT: test\n"); 127 if ((get_vendor() == ARCH_INTEL) && res) 128 ksft_print_msg("Intel CMT may be inaccurate when Sub-NUMA Clustering is enabled. Check BIOS configuration.\n"); 129 cmt_test_cleanup(); 130 } 131 132 static void run_cat_test(int cpu_no, int no_of_bits) 133 { 134 int res; 135 136 ksft_print_msg("Starting CAT test ...\n"); 137 138 if (!validate_resctrl_feature_request(CAT_STR)) { 139 ksft_test_result_skip("Hardware does not support CAT or CAT is disabled\n"); 140 return; 141 } 142 143 res = cat_perf_miss_val(cpu_no, no_of_bits, "L3"); 144 ksft_test_result(!res, "CAT: test\n"); 145 cat_test_cleanup(); 146 } 147 148 int main(int argc, char **argv) 149 { 150 bool has_ben = false, mbm_test = true, mba_test = true, cmt_test = true; 151 int c, cpu_no = 1, span = 250, argc_new = argc, i, no_of_bits = 0; 152 char *benchmark_cmd[BENCHMARK_ARGS], bw_report[64], bm_type[64]; 153 char benchmark_cmd_area[BENCHMARK_ARGS][BENCHMARK_ARG_SIZE]; 154 int ben_ind, ben_count, tests = 0; 155 bool cat_test = true; 156 157 for (i = 0; i < argc; i++) { 158 if (strcmp(argv[i], "-b") == 0) { 159 ben_ind = i + 1; 160 ben_count = argc - ben_ind; 161 argc_new = ben_ind - 1; 162 has_ben = true; 163 break; 164 } 165 } 166 167 while ((c = getopt(argc_new, argv, "ht:b:n:p:")) != -1) { 168 char *token; 169 170 switch (c) { 171 case 't': 172 token = strtok(optarg, ","); 173 174 mbm_test = false; 175 mba_test = false; 176 cmt_test = false; 177 cat_test = false; 178 while (token) { 179 if (!strncmp(token, MBM_STR, sizeof(MBM_STR))) { 180 mbm_test = true; 181 tests++; 182 } else if (!strncmp(token, MBA_STR, sizeof(MBA_STR))) { 183 mba_test = true; 184 tests++; 185 } else if (!strncmp(token, CMT_STR, sizeof(CMT_STR))) { 186 cmt_test = true; 187 tests++; 188 } else if (!strncmp(token, CAT_STR, sizeof(CAT_STR))) { 189 cat_test = true; 190 tests++; 191 } else { 192 printf("invalid argument\n"); 193 194 return -1; 195 } 196 token = strtok(NULL, ","); 197 } 198 break; 199 case 'p': 200 cpu_no = atoi(optarg); 201 break; 202 case 'n': 203 no_of_bits = atoi(optarg); 204 if (no_of_bits <= 0) { 205 printf("Bail out! invalid argument for no_of_bits\n"); 206 return -1; 207 } 208 break; 209 case 'h': 210 cmd_help(); 211 212 return 0; 213 default: 214 printf("invalid argument\n"); 215 216 return -1; 217 } 218 } 219 220 ksft_print_header(); 221 222 /* 223 * Typically we need root privileges, because: 224 * 1. We write to resctrl FS 225 * 2. We execute perf commands 226 */ 227 if (geteuid() != 0) 228 return ksft_exit_skip("Not running as root. Skipping...\n"); 229 230 if (has_ben) { 231 /* Extract benchmark command from command line. */ 232 for (i = ben_ind; i < argc; i++) { 233 benchmark_cmd[i - ben_ind] = benchmark_cmd_area[i]; 234 sprintf(benchmark_cmd[i - ben_ind], "%s", argv[i]); 235 } 236 benchmark_cmd[ben_count] = NULL; 237 } else { 238 /* If no benchmark is given by "-b" argument, use fill_buf. */ 239 for (i = 0; i < 6; i++) 240 benchmark_cmd[i] = benchmark_cmd_area[i]; 241 242 strcpy(benchmark_cmd[0], "fill_buf"); 243 sprintf(benchmark_cmd[1], "%d", span); 244 strcpy(benchmark_cmd[2], "1"); 245 strcpy(benchmark_cmd[3], "1"); 246 strcpy(benchmark_cmd[4], "0"); 247 strcpy(benchmark_cmd[5], ""); 248 benchmark_cmd[6] = NULL; 249 } 250 251 sprintf(bw_report, "reads"); 252 sprintf(bm_type, "fill_buf"); 253 254 if (!check_resctrlfs_support()) 255 return ksft_exit_skip("resctrl FS does not exist. Enable X86_CPU_RESCTRL config option.\n"); 256 257 filter_dmesg(); 258 259 ksft_set_plan(tests ? : 4); 260 261 if ((get_vendor() == ARCH_INTEL) && mbm_test) 262 run_mbm_test(has_ben, benchmark_cmd, span, cpu_no, bw_report); 263 264 if ((get_vendor() == ARCH_INTEL) && mba_test) 265 run_mba_test(has_ben, benchmark_cmd, span, cpu_no, bw_report); 266 267 if (cmt_test) 268 run_cmt_test(has_ben, benchmark_cmd, cpu_no); 269 270 if (cat_test) 271 run_cat_test(cpu_no, no_of_bits); 272 273 umount_resctrlfs(); 274 275 return ksft_exit_pass(); 276 } 277