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
detect_vendor(void)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
get_vendor(void)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
cmd_help(void)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
tests_cleanup(void)65 void tests_cleanup(void)
66 {
67 mbm_test_cleanup();
68 mba_test_cleanup();
69 cmt_test_cleanup();
70 cat_test_cleanup();
71 }
72
run_mbm_test(bool has_ben,char ** benchmark_cmd,int span,int cpu_no,char * bw_report)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 mbm_test_cleanup();
90 }
91
run_mba_test(bool has_ben,char ** benchmark_cmd,int span,int cpu_no,char * bw_report)92 static void run_mba_test(bool has_ben, char **benchmark_cmd, int span,
93 int cpu_no, char *bw_report)
94 {
95 int res;
96
97 ksft_print_msg("Starting MBA Schemata change ...\n");
98
99 if (!validate_resctrl_feature_request(MBA_STR)) {
100 ksft_test_result_skip("Hardware does not support MBA or MBA is disabled\n");
101 return;
102 }
103
104 if (!has_ben)
105 sprintf(benchmark_cmd[1], "%d", span);
106 res = mba_schemata_change(cpu_no, bw_report, benchmark_cmd);
107 ksft_test_result(!res, "MBA: schemata change\n");
108 mba_test_cleanup();
109 }
110
run_cmt_test(bool has_ben,char ** benchmark_cmd,int cpu_no)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 cmt_test_cleanup();
126 }
127
run_cat_test(int cpu_no,int no_of_bits)128 static void run_cat_test(int cpu_no, int no_of_bits)
129 {
130 int res;
131
132 ksft_print_msg("Starting CAT test ...\n");
133
134 if (!validate_resctrl_feature_request(CAT_STR)) {
135 ksft_test_result_skip("Hardware does not support CAT or CAT is disabled\n");
136 return;
137 }
138
139 res = cat_perf_miss_val(cpu_no, no_of_bits, "L3");
140 ksft_test_result(!res, "CAT: test\n");
141 cat_test_cleanup();
142 }
143
main(int argc,char ** argv)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_fail_msg("Not running as root, abort testing.\n");
225
226 if (has_ben) {
227 if (argc - ben_ind >= BENCHMARK_ARGS)
228 ksft_exit_fail_msg("Too long benchmark command.\n");
229
230 /* Extract benchmark command from command line. */
231 for (i = ben_ind; i < argc; i++) {
232 benchmark_cmd[i - ben_ind] = benchmark_cmd_area[i];
233 if (strlen(argv[i]) >= BENCHMARK_ARG_SIZE)
234 ksft_exit_fail_msg("Too long benchmark command argument.\n");
235 sprintf(benchmark_cmd[i - ben_ind], "%s", argv[i]);
236 }
237 benchmark_cmd[ben_count] = NULL;
238 } else {
239 /* If no benchmark is given by "-b" argument, use fill_buf. */
240 for (i = 0; i < 6; i++)
241 benchmark_cmd[i] = benchmark_cmd_area[i];
242
243 strcpy(benchmark_cmd[0], "fill_buf");
244 sprintf(benchmark_cmd[1], "%d", span);
245 strcpy(benchmark_cmd[2], "1");
246 strcpy(benchmark_cmd[3], "1");
247 strcpy(benchmark_cmd[4], "0");
248 strcpy(benchmark_cmd[5], "");
249 benchmark_cmd[6] = NULL;
250 }
251
252 sprintf(bw_report, "reads");
253 sprintf(bm_type, "fill_buf");
254
255 if (!check_resctrlfs_support())
256 return ksft_exit_fail_msg("resctrl FS does not exist\n");
257
258 filter_dmesg();
259
260 ksft_set_plan(tests ? : 4);
261
262 if ((get_vendor() == ARCH_INTEL) && mbm_test)
263 run_mbm_test(has_ben, benchmark_cmd, span, cpu_no, bw_report);
264
265 if ((get_vendor() == ARCH_INTEL) && mba_test)
266 run_mba_test(has_ben, benchmark_cmd, span, cpu_no, bw_report);
267
268 if (cmt_test)
269 run_cmt_test(has_ben, benchmark_cmd, cpu_no);
270
271 if (cat_test)
272 run_cat_test(cpu_no, no_of_bits);
273
274 umount_resctrlfs();
275
276 return ksft_exit_pass();
277 }
278