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11#include "resctrl.h"
12
13#define BENCHMARK_ARGS 64
14#define BENCHMARK_ARG_SIZE 64
15
16static 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
41int 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
53static 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
65void tests_cleanup(void)
66{
67 mbm_test_cleanup();
68 mba_test_cleanup();
69 cmt_test_cleanup();
70 cat_test_cleanup();
71}
72
73static 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
94static 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
113static 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
132static 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
148int 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
224
225
226
227 if (geteuid() != 0)
228 return ksft_exit_skip("Not running as root. Skipping...\n");
229
230 if (has_ben) {
231
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
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
