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11#include "resctrl.h"
12
13#define BENCHMARK_ARGS 64
14#define BENCHMARK_ARG_SIZE 64
15
16bool is_amd;
17
18void 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
37static 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 CMT\n");
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,cmt,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
49void tests_cleanup(void)
50{
51 mbm_test_cleanup();
52 mba_test_cleanup();
53 cmt_test_cleanup();
54 cat_test_cleanup();
55}
56
57static void run_mbm_test(bool has_ben, char **benchmark_cmd, int span,
58 int cpu_no, char *bw_report)
59{
60 int res;
61
62 ksft_print_msg("Starting MBM BW change ...\n");
63
64 if (!validate_resctrl_feature_request(MBM_STR)) {
65 ksft_test_result_skip("Hardware does not support MBM or MBM is disabled\n");
66 return;
67 }
68
69 if (!has_ben)
70 sprintf(benchmark_cmd[5], "%s", MBA_STR);
71 res = mbm_bw_change(span, cpu_no, bw_report, benchmark_cmd);
72 ksft_test_result(!res, "MBM: bw change\n");
73 mbm_test_cleanup();
74}
75
76static void run_mba_test(bool has_ben, char **benchmark_cmd, int span,
77 int cpu_no, char *bw_report)
78{
79 int res;
80
81 ksft_print_msg("Starting MBA Schemata change ...\n");
82
83 if (!validate_resctrl_feature_request(MBA_STR)) {
84 ksft_test_result_skip("Hardware does not support MBA or MBA is disabled\n");
85 return;
86 }
87
88 if (!has_ben)
89 sprintf(benchmark_cmd[1], "%d", span);
90 res = mba_schemata_change(cpu_no, bw_report, benchmark_cmd);
91 ksft_test_result(!res, "MBA: schemata change\n");
92 mba_test_cleanup();
93}
94
95static void run_cmt_test(bool has_ben, char **benchmark_cmd, int cpu_no)
96{
97 int res;
98
99 ksft_print_msg("Starting CMT test ...\n");
100 if (!validate_resctrl_feature_request(CMT_STR)) {
101 ksft_test_result_skip("Hardware does not support CMT or CMT is disabled\n");
102 return;
103 }
104
105 if (!has_ben)
106 sprintf(benchmark_cmd[5], "%s", CMT_STR);
107 res = cmt_resctrl_val(cpu_no, 5, benchmark_cmd);
108 ksft_test_result(!res, "CMT: test\n");
109 cmt_test_cleanup();
110}
111
112static void run_cat_test(int cpu_no, int no_of_bits)
113{
114 int res;
115
116 ksft_print_msg("Starting CAT test ...\n");
117
118 if (!validate_resctrl_feature_request(CAT_STR)) {
119 ksft_test_result_skip("Hardware does not support CAT or CAT is disabled\n");
120 return;
121 }
122
123 res = cat_perf_miss_val(cpu_no, no_of_bits, "L3");
124 ksft_test_result(!res, "CAT: test\n");
125 cat_test_cleanup();
126}
127
128int main(int argc, char **argv)
129{
130 bool has_ben = false, mbm_test = true, mba_test = true, cmt_test = true;
131 int c, cpu_no = 1, span = 250, argc_new = argc, i, no_of_bits = 0;
132 char *benchmark_cmd[BENCHMARK_ARGS], bw_report[64], bm_type[64];
133 char benchmark_cmd_area[BENCHMARK_ARGS][BENCHMARK_ARG_SIZE];
134 int ben_ind, ben_count, tests = 0;
135 bool cat_test = true;
136
137 for (i = 0; i < argc; i++) {
138 if (strcmp(argv[i], "-b") == 0) {
139 ben_ind = i + 1;
140 ben_count = argc - ben_ind;
141 argc_new = ben_ind - 1;
142 has_ben = true;
143 break;
144 }
145 }
146
147 while ((c = getopt(argc_new, argv, "ht:b:n:p:")) != -1) {
148 char *token;
149
150 switch (c) {
151 case 't':
152 token = strtok(optarg, ",");
153
154 mbm_test = false;
155 mba_test = false;
156 cmt_test = false;
157 cat_test = false;
158 while (token) {
159 if (!strncmp(token, MBM_STR, sizeof(MBM_STR))) {
160 mbm_test = true;
161 tests++;
162 } else if (!strncmp(token, MBA_STR, sizeof(MBA_STR))) {
163 mba_test = true;
164 tests++;
165 } else if (!strncmp(token, CMT_STR, sizeof(CMT_STR))) {
166 cmt_test = true;
167 tests++;
168 } else if (!strncmp(token, CAT_STR, sizeof(CAT_STR))) {
169 cat_test = true;
170 tests++;
171 } else {
172 printf("invalid argument\n");
173
174 return -1;
175 }
176 token = strtok(NULL, ",");
177 }
178 break;
179 case 'p':
180 cpu_no = atoi(optarg);
181 break;
182 case 'n':
183 no_of_bits = atoi(optarg);
184 if (no_of_bits <= 0) {
185 printf("Bail out! invalid argument for no_of_bits\n");
186 return -1;
187 }
188 break;
189 case 'h':
190 cmd_help();
191
192 return 0;
193 default:
194 printf("invalid argument\n");
195
196 return -1;
197 }
198 }
199
200 ksft_print_header();
201
202
203
204
205
206
207 if (geteuid() != 0)
208 return ksft_exit_fail_msg("Not running as root, abort testing.\n");
209
210
211 detect_amd();
212
213 if (has_ben) {
214
215 for (i = ben_ind; i < argc; i++) {
216 benchmark_cmd[i - ben_ind] = benchmark_cmd_area[i];
217 sprintf(benchmark_cmd[i - ben_ind], "%s", argv[i]);
218 }
219 benchmark_cmd[ben_count] = NULL;
220 } else {
221
222 for (i = 0; i < 6; i++)
223 benchmark_cmd[i] = benchmark_cmd_area[i];
224
225 strcpy(benchmark_cmd[0], "fill_buf");
226 sprintf(benchmark_cmd[1], "%d", span);
227 strcpy(benchmark_cmd[2], "1");
228 strcpy(benchmark_cmd[3], "1");
229 strcpy(benchmark_cmd[4], "0");
230 strcpy(benchmark_cmd[5], "");
231 benchmark_cmd[6] = NULL;
232 }
233
234 sprintf(bw_report, "reads");
235 sprintf(bm_type, "fill_buf");
236
237 if (!check_resctrlfs_support())
238 return ksft_exit_fail_msg("resctrl FS does not exist\n");
239
240 filter_dmesg();
241
242 ksft_set_plan(tests ? : 4);
243
244 if (!is_amd && mbm_test)
245 run_mbm_test(has_ben, benchmark_cmd, span, cpu_no, bw_report);
246
247 if (!is_amd && mba_test)
248 run_mba_test(has_ben, benchmark_cmd, span, cpu_no, bw_report);
249
250 if (cmt_test)
251 run_cmt_test(has_ben, benchmark_cmd, cpu_no);
252
253 if (cat_test)
254 run_cat_test(cpu_no, no_of_bits);
255
256 umount_resctrlfs();
257
258 return ksft_exit_pass();
259}
260
