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 bool is_amd; 17 18 void detect_amd(void) 19 { 20 FILE *inf = fopen("/proc/cpuinfo", "r"); 21 char *res; 22 23 if (!inf) 24 return; 25 26 res = fgrep(inf, "vendor_id"); 27 28 if (res) { 29 char *s = strchr(res, ':'); 30 31 is_amd = s && !strcmp(s, ": AuthenticAMD\n"); 32 free(res); 33 } 34 fclose(inf); 35 } 36 37 static void cmd_help(void) 38 { 39 printf("usage: resctrl_tests [-h] [-b \"benchmark_cmd [options]\"] [-t test list] [-n no_of_bits]\n"); 40 printf("\t-b benchmark_cmd [options]: run specified benchmark for MBM, MBA and CQM"); 41 printf("\t default benchmark is builtin fill_buf\n"); 42 printf("\t-t test list: run tests specified in the test list, "); 43 printf("e.g. -t mbm, mba, cqm, cat\n"); 44 printf("\t-n no_of_bits: run cache tests using specified no of bits in cache bit mask\n"); 45 printf("\t-p cpu_no: specify CPU number to run the test. 1 is default\n"); 46 printf("\t-h: help\n"); 47 } 48 49 void tests_cleanup(void) 50 { 51 mbm_test_cleanup(); 52 mba_test_cleanup(); 53 cqm_test_cleanup(); 54 cat_test_cleanup(); 55 } 56 57 int main(int argc, char **argv) 58 { 59 bool has_ben = false, mbm_test = true, mba_test = true, cqm_test = true; 60 int res, c, cpu_no = 1, span = 250, argc_new = argc, i, no_of_bits = 5; 61 char *benchmark_cmd[BENCHMARK_ARGS], bw_report[64], bm_type[64]; 62 char benchmark_cmd_area[BENCHMARK_ARGS][BENCHMARK_ARG_SIZE]; 63 int ben_ind, ben_count; 64 bool cat_test = true; 65 66 for (i = 0; i < argc; i++) { 67 if (strcmp(argv[i], "-b") == 0) { 68 ben_ind = i + 1; 69 ben_count = argc - ben_ind; 70 argc_new = ben_ind - 1; 71 has_ben = true; 72 break; 73 } 74 } 75 76 while ((c = getopt(argc_new, argv, "ht:b:")) != -1) { 77 char *token; 78 79 switch (c) { 80 case 't': 81 token = strtok(optarg, ","); 82 83 mbm_test = false; 84 mba_test = false; 85 cqm_test = false; 86 cat_test = false; 87 while (token) { 88 if (!strcmp(token, "mbm")) { 89 mbm_test = true; 90 } else if (!strcmp(token, "mba")) { 91 mba_test = true; 92 } else if (!strcmp(token, "cqm")) { 93 cqm_test = true; 94 } else if (!strcmp(token, "cat")) { 95 cat_test = true; 96 } else { 97 printf("invalid argument\n"); 98 99 return -1; 100 } 101 token = strtok(NULL, ":\t"); 102 } 103 break; 104 case 'p': 105 cpu_no = atoi(optarg); 106 break; 107 case 'n': 108 no_of_bits = atoi(optarg); 109 break; 110 case 'h': 111 cmd_help(); 112 113 return 0; 114 default: 115 printf("invalid argument\n"); 116 117 return -1; 118 } 119 } 120 121 printf("TAP version 13\n"); 122 123 /* 124 * Typically we need root privileges, because: 125 * 1. We write to resctrl FS 126 * 2. We execute perf commands 127 */ 128 if (geteuid() != 0) 129 printf("# WARNING: not running as root, tests may fail.\n"); 130 131 /* Detect AMD vendor */ 132 detect_amd(); 133 134 if (has_ben) { 135 /* Extract benchmark command from command line. */ 136 for (i = ben_ind; i < argc; i++) { 137 benchmark_cmd[i - ben_ind] = benchmark_cmd_area[i]; 138 sprintf(benchmark_cmd[i - ben_ind], "%s", argv[i]); 139 } 140 benchmark_cmd[ben_count] = NULL; 141 } else { 142 /* If no benchmark is given by "-b" argument, use fill_buf. */ 143 for (i = 0; i < 6; i++) 144 benchmark_cmd[i] = benchmark_cmd_area[i]; 145 146 strcpy(benchmark_cmd[0], "fill_buf"); 147 sprintf(benchmark_cmd[1], "%d", span); 148 strcpy(benchmark_cmd[2], "1"); 149 strcpy(benchmark_cmd[3], "1"); 150 strcpy(benchmark_cmd[4], "0"); 151 strcpy(benchmark_cmd[5], ""); 152 benchmark_cmd[6] = NULL; 153 } 154 155 sprintf(bw_report, "reads"); 156 sprintf(bm_type, "fill_buf"); 157 158 check_resctrlfs_support(); 159 filter_dmesg(); 160 161 if (!is_amd && mbm_test) { 162 printf("# Starting MBM BW change ...\n"); 163 if (!has_ben) 164 sprintf(benchmark_cmd[5], "%s", "mba"); 165 res = mbm_bw_change(span, cpu_no, bw_report, benchmark_cmd); 166 printf("%sok MBM: bw change\n", res ? "not " : ""); 167 mbm_test_cleanup(); 168 tests_run++; 169 } 170 171 if (!is_amd && mba_test) { 172 printf("# Starting MBA Schemata change ...\n"); 173 if (!has_ben) 174 sprintf(benchmark_cmd[1], "%d", span); 175 res = mba_schemata_change(cpu_no, bw_report, benchmark_cmd); 176 printf("%sok MBA: schemata change\n", res ? "not " : ""); 177 mba_test_cleanup(); 178 tests_run++; 179 } 180 181 if (cqm_test) { 182 printf("# Starting CQM test ...\n"); 183 if (!has_ben) 184 sprintf(benchmark_cmd[5], "%s", "cqm"); 185 res = cqm_resctrl_val(cpu_no, no_of_bits, benchmark_cmd); 186 printf("%sok CQM: test\n", res ? "not " : ""); 187 cqm_test_cleanup(); 188 tests_run++; 189 } 190 191 if (cat_test) { 192 printf("# Starting CAT test ...\n"); 193 res = cat_perf_miss_val(cpu_no, no_of_bits, "L3"); 194 printf("%sok CAT: test\n", res ? "not " : ""); 195 tests_run++; 196 cat_test_cleanup(); 197 } 198 199 printf("1..%d\n", tests_run); 200 201 return 0; 202 } 203