Arnaldo Carvalho de Melo | 1c6a800 | 2010-04-29 18:58:32 -0300 | [diff] [blame] | 1 | /* |
| 2 | * builtin-test.c |
| 3 | * |
| 4 | * Builtin regression testing command: ever growing number of sanity tests |
| 5 | */ |
| 6 | #include "builtin.h" |
| 7 | |
| 8 | #include "util/cache.h" |
| 9 | #include "util/debug.h" |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 10 | #include "util/evlist.h" |
Arnaldo Carvalho de Melo | 1c6a800 | 2010-04-29 18:58:32 -0300 | [diff] [blame] | 11 | #include "util/parse-options.h" |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 12 | #include "util/parse-events.h" |
Arnaldo Carvalho de Melo | 1c6a800 | 2010-04-29 18:58:32 -0300 | [diff] [blame] | 13 | #include "util/symbol.h" |
Arnaldo Carvalho de Melo | fd78260 | 2011-01-18 15:15:24 -0200 | [diff] [blame] | 14 | #include "util/thread_map.h" |
Arnaldo Carvalho de Melo | 1c6a800 | 2010-04-29 18:58:32 -0300 | [diff] [blame] | 15 | |
| 16 | static long page_size; |
| 17 | |
| 18 | static int vmlinux_matches_kallsyms_filter(struct map *map __used, struct symbol *sym) |
| 19 | { |
| 20 | bool *visited = symbol__priv(sym); |
| 21 | *visited = true; |
| 22 | return 0; |
| 23 | } |
| 24 | |
| 25 | static int test__vmlinux_matches_kallsyms(void) |
| 26 | { |
| 27 | int err = -1; |
| 28 | struct rb_node *nd; |
| 29 | struct symbol *sym; |
| 30 | struct map *kallsyms_map, *vmlinux_map; |
| 31 | struct machine kallsyms, vmlinux; |
| 32 | enum map_type type = MAP__FUNCTION; |
| 33 | struct ref_reloc_sym ref_reloc_sym = { .name = "_stext", }; |
| 34 | |
| 35 | /* |
| 36 | * Step 1: |
| 37 | * |
| 38 | * Init the machines that will hold kernel, modules obtained from |
| 39 | * both vmlinux + .ko files and from /proc/kallsyms split by modules. |
| 40 | */ |
| 41 | machine__init(&kallsyms, "", HOST_KERNEL_ID); |
| 42 | machine__init(&vmlinux, "", HOST_KERNEL_ID); |
| 43 | |
| 44 | /* |
| 45 | * Step 2: |
| 46 | * |
| 47 | * Create the kernel maps for kallsyms and the DSO where we will then |
| 48 | * load /proc/kallsyms. Also create the modules maps from /proc/modules |
| 49 | * and find the .ko files that match them in /lib/modules/`uname -r`/. |
| 50 | */ |
| 51 | if (machine__create_kernel_maps(&kallsyms) < 0) { |
| 52 | pr_debug("machine__create_kernel_maps "); |
| 53 | return -1; |
| 54 | } |
| 55 | |
| 56 | /* |
| 57 | * Step 3: |
| 58 | * |
| 59 | * Load and split /proc/kallsyms into multiple maps, one per module. |
| 60 | */ |
| 61 | if (machine__load_kallsyms(&kallsyms, "/proc/kallsyms", type, NULL) <= 0) { |
| 62 | pr_debug("dso__load_kallsyms "); |
| 63 | goto out; |
| 64 | } |
| 65 | |
| 66 | /* |
| 67 | * Step 4: |
| 68 | * |
| 69 | * kallsyms will be internally on demand sorted by name so that we can |
| 70 | * find the reference relocation * symbol, i.e. the symbol we will use |
| 71 | * to see if the running kernel was relocated by checking if it has the |
| 72 | * same value in the vmlinux file we load. |
| 73 | */ |
| 74 | kallsyms_map = machine__kernel_map(&kallsyms, type); |
| 75 | |
| 76 | sym = map__find_symbol_by_name(kallsyms_map, ref_reloc_sym.name, NULL); |
| 77 | if (sym == NULL) { |
| 78 | pr_debug("dso__find_symbol_by_name "); |
| 79 | goto out; |
| 80 | } |
| 81 | |
| 82 | ref_reloc_sym.addr = sym->start; |
| 83 | |
| 84 | /* |
| 85 | * Step 5: |
| 86 | * |
| 87 | * Now repeat step 2, this time for the vmlinux file we'll auto-locate. |
| 88 | */ |
| 89 | if (machine__create_kernel_maps(&vmlinux) < 0) { |
| 90 | pr_debug("machine__create_kernel_maps "); |
| 91 | goto out; |
| 92 | } |
| 93 | |
| 94 | vmlinux_map = machine__kernel_map(&vmlinux, type); |
| 95 | map__kmap(vmlinux_map)->ref_reloc_sym = &ref_reloc_sym; |
| 96 | |
| 97 | /* |
| 98 | * Step 6: |
| 99 | * |
| 100 | * Locate a vmlinux file in the vmlinux path that has a buildid that |
| 101 | * matches the one of the running kernel. |
| 102 | * |
| 103 | * While doing that look if we find the ref reloc symbol, if we find it |
| 104 | * we'll have its ref_reloc_symbol.unrelocated_addr and then |
| 105 | * maps__reloc_vmlinux will notice and set proper ->[un]map_ip routines |
| 106 | * to fixup the symbols. |
| 107 | */ |
| 108 | if (machine__load_vmlinux_path(&vmlinux, type, |
| 109 | vmlinux_matches_kallsyms_filter) <= 0) { |
| 110 | pr_debug("machine__load_vmlinux_path "); |
| 111 | goto out; |
| 112 | } |
| 113 | |
| 114 | err = 0; |
| 115 | /* |
| 116 | * Step 7: |
| 117 | * |
| 118 | * Now look at the symbols in the vmlinux DSO and check if we find all of them |
| 119 | * in the kallsyms dso. For the ones that are in both, check its names and |
| 120 | * end addresses too. |
| 121 | */ |
| 122 | for (nd = rb_first(&vmlinux_map->dso->symbols[type]); nd; nd = rb_next(nd)) { |
Arnaldo Carvalho de Melo | d367875 | 2010-12-21 23:38:37 -0200 | [diff] [blame] | 123 | struct symbol *pair, *first_pair; |
| 124 | bool backwards = true; |
Arnaldo Carvalho de Melo | 1c6a800 | 2010-04-29 18:58:32 -0300 | [diff] [blame] | 125 | |
| 126 | sym = rb_entry(nd, struct symbol, rb_node); |
Arnaldo Carvalho de Melo | d367875 | 2010-12-21 23:38:37 -0200 | [diff] [blame] | 127 | |
| 128 | if (sym->start == sym->end) |
| 129 | continue; |
| 130 | |
| 131 | first_pair = machine__find_kernel_symbol(&kallsyms, type, sym->start, NULL, NULL); |
| 132 | pair = first_pair; |
Arnaldo Carvalho de Melo | 1c6a800 | 2010-04-29 18:58:32 -0300 | [diff] [blame] | 133 | |
| 134 | if (pair && pair->start == sym->start) { |
| 135 | next_pair: |
| 136 | if (strcmp(sym->name, pair->name) == 0) { |
| 137 | /* |
| 138 | * kallsyms don't have the symbol end, so we |
| 139 | * set that by using the next symbol start - 1, |
| 140 | * in some cases we get this up to a page |
| 141 | * wrong, trace_kmalloc when I was developing |
| 142 | * this code was one such example, 2106 bytes |
| 143 | * off the real size. More than that and we |
| 144 | * _really_ have a problem. |
| 145 | */ |
| 146 | s64 skew = sym->end - pair->end; |
| 147 | if (llabs(skew) < page_size) |
| 148 | continue; |
| 149 | |
Arnaldo Carvalho de Melo | 9486aa3 | 2011-01-22 20:37:02 -0200 | [diff] [blame] | 150 | pr_debug("%#" PRIx64 ": diff end addr for %s v: %#" PRIx64 " k: %#" PRIx64 "\n", |
Arnaldo Carvalho de Melo | 1c6a800 | 2010-04-29 18:58:32 -0300 | [diff] [blame] | 151 | sym->start, sym->name, sym->end, pair->end); |
| 152 | } else { |
Arnaldo Carvalho de Melo | d367875 | 2010-12-21 23:38:37 -0200 | [diff] [blame] | 153 | struct rb_node *nnd; |
| 154 | detour: |
| 155 | nnd = backwards ? rb_prev(&pair->rb_node) : |
| 156 | rb_next(&pair->rb_node); |
Arnaldo Carvalho de Melo | 1c6a800 | 2010-04-29 18:58:32 -0300 | [diff] [blame] | 157 | if (nnd) { |
| 158 | struct symbol *next = rb_entry(nnd, struct symbol, rb_node); |
| 159 | |
| 160 | if (next->start == sym->start) { |
| 161 | pair = next; |
| 162 | goto next_pair; |
| 163 | } |
| 164 | } |
Arnaldo Carvalho de Melo | d367875 | 2010-12-21 23:38:37 -0200 | [diff] [blame] | 165 | |
| 166 | if (backwards) { |
| 167 | backwards = false; |
| 168 | pair = first_pair; |
| 169 | goto detour; |
| 170 | } |
| 171 | |
Arnaldo Carvalho de Melo | 9486aa3 | 2011-01-22 20:37:02 -0200 | [diff] [blame] | 172 | pr_debug("%#" PRIx64 ": diff name v: %s k: %s\n", |
Arnaldo Carvalho de Melo | 1c6a800 | 2010-04-29 18:58:32 -0300 | [diff] [blame] | 173 | sym->start, sym->name, pair->name); |
| 174 | } |
| 175 | } else |
Arnaldo Carvalho de Melo | 9486aa3 | 2011-01-22 20:37:02 -0200 | [diff] [blame] | 176 | pr_debug("%#" PRIx64 ": %s not on kallsyms\n", sym->start, sym->name); |
Arnaldo Carvalho de Melo | 1c6a800 | 2010-04-29 18:58:32 -0300 | [diff] [blame] | 177 | |
| 178 | err = -1; |
| 179 | } |
| 180 | |
| 181 | if (!verbose) |
| 182 | goto out; |
| 183 | |
| 184 | pr_info("Maps only in vmlinux:\n"); |
| 185 | |
| 186 | for (nd = rb_first(&vmlinux.kmaps.maps[type]); nd; nd = rb_next(nd)) { |
| 187 | struct map *pos = rb_entry(nd, struct map, rb_node), *pair; |
| 188 | /* |
| 189 | * If it is the kernel, kallsyms is always "[kernel.kallsyms]", while |
| 190 | * the kernel will have the path for the vmlinux file being used, |
| 191 | * so use the short name, less descriptive but the same ("[kernel]" in |
| 192 | * both cases. |
| 193 | */ |
| 194 | pair = map_groups__find_by_name(&kallsyms.kmaps, type, |
| 195 | (pos->dso->kernel ? |
| 196 | pos->dso->short_name : |
| 197 | pos->dso->name)); |
| 198 | if (pair) |
| 199 | pair->priv = 1; |
| 200 | else |
| 201 | map__fprintf(pos, stderr); |
| 202 | } |
| 203 | |
| 204 | pr_info("Maps in vmlinux with a different name in kallsyms:\n"); |
| 205 | |
| 206 | for (nd = rb_first(&vmlinux.kmaps.maps[type]); nd; nd = rb_next(nd)) { |
| 207 | struct map *pos = rb_entry(nd, struct map, rb_node), *pair; |
| 208 | |
| 209 | pair = map_groups__find(&kallsyms.kmaps, type, pos->start); |
| 210 | if (pair == NULL || pair->priv) |
| 211 | continue; |
| 212 | |
| 213 | if (pair->start == pos->start) { |
| 214 | pair->priv = 1; |
Arnaldo Carvalho de Melo | 9486aa3 | 2011-01-22 20:37:02 -0200 | [diff] [blame] | 215 | pr_info(" %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s in kallsyms as", |
Arnaldo Carvalho de Melo | 1c6a800 | 2010-04-29 18:58:32 -0300 | [diff] [blame] | 216 | pos->start, pos->end, pos->pgoff, pos->dso->name); |
| 217 | if (pos->pgoff != pair->pgoff || pos->end != pair->end) |
Arnaldo Carvalho de Melo | 9486aa3 | 2011-01-22 20:37:02 -0200 | [diff] [blame] | 218 | pr_info(": \n*%" PRIx64 "-%" PRIx64 " %" PRIx64 "", |
Arnaldo Carvalho de Melo | 1c6a800 | 2010-04-29 18:58:32 -0300 | [diff] [blame] | 219 | pair->start, pair->end, pair->pgoff); |
| 220 | pr_info(" %s\n", pair->dso->name); |
| 221 | pair->priv = 1; |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | pr_info("Maps only in kallsyms:\n"); |
| 226 | |
| 227 | for (nd = rb_first(&kallsyms.kmaps.maps[type]); |
| 228 | nd; nd = rb_next(nd)) { |
| 229 | struct map *pos = rb_entry(nd, struct map, rb_node); |
| 230 | |
| 231 | if (!pos->priv) |
| 232 | map__fprintf(pos, stderr); |
| 233 | } |
| 234 | out: |
| 235 | return err; |
| 236 | } |
| 237 | |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 238 | #include "util/cpumap.h" |
Arnaldo Carvalho de Melo | d854861 | 2011-01-04 00:16:20 -0200 | [diff] [blame] | 239 | #include "util/evsel.h" |
| 240 | #include <sys/types.h> |
| 241 | |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 242 | static int trace_event__id(const char *evname) |
Arnaldo Carvalho de Melo | d854861 | 2011-01-04 00:16:20 -0200 | [diff] [blame] | 243 | { |
| 244 | char *filename; |
| 245 | int err = -1, fd; |
| 246 | |
| 247 | if (asprintf(&filename, |
| 248 | "/sys/kernel/debug/tracing/events/syscalls/%s/id", |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 249 | evname) < 0) |
Arnaldo Carvalho de Melo | d854861 | 2011-01-04 00:16:20 -0200 | [diff] [blame] | 250 | return -1; |
| 251 | |
| 252 | fd = open(filename, O_RDONLY); |
| 253 | if (fd >= 0) { |
| 254 | char id[16]; |
| 255 | if (read(fd, id, sizeof(id)) > 0) |
| 256 | err = atoi(id); |
| 257 | close(fd); |
| 258 | } |
| 259 | |
| 260 | free(filename); |
| 261 | return err; |
| 262 | } |
| 263 | |
| 264 | static int test__open_syscall_event(void) |
| 265 | { |
| 266 | int err = -1, fd; |
| 267 | struct thread_map *threads; |
| 268 | struct perf_evsel *evsel; |
Lin Ming | 23a2f3a | 2011-01-07 11:11:09 +0800 | [diff] [blame] | 269 | struct perf_event_attr attr; |
Arnaldo Carvalho de Melo | d854861 | 2011-01-04 00:16:20 -0200 | [diff] [blame] | 270 | unsigned int nr_open_calls = 111, i; |
| 271 | int id = trace_event__id("sys_enter_open"); |
| 272 | |
| 273 | if (id < 0) { |
Arnaldo Carvalho de Melo | 454a3bb | 2011-01-04 10:40:08 -0200 | [diff] [blame] | 274 | pr_debug("is debugfs mounted on /sys/kernel/debug?\n"); |
Arnaldo Carvalho de Melo | d854861 | 2011-01-04 00:16:20 -0200 | [diff] [blame] | 275 | return -1; |
| 276 | } |
| 277 | |
| 278 | threads = thread_map__new(-1, getpid()); |
| 279 | if (threads == NULL) { |
Arnaldo Carvalho de Melo | 454a3bb | 2011-01-04 10:40:08 -0200 | [diff] [blame] | 280 | pr_debug("thread_map__new\n"); |
Arnaldo Carvalho de Melo | d854861 | 2011-01-04 00:16:20 -0200 | [diff] [blame] | 281 | return -1; |
| 282 | } |
| 283 | |
Lin Ming | 23a2f3a | 2011-01-07 11:11:09 +0800 | [diff] [blame] | 284 | memset(&attr, 0, sizeof(attr)); |
| 285 | attr.type = PERF_TYPE_TRACEPOINT; |
| 286 | attr.config = id; |
| 287 | evsel = perf_evsel__new(&attr, 0); |
Arnaldo Carvalho de Melo | d854861 | 2011-01-04 00:16:20 -0200 | [diff] [blame] | 288 | if (evsel == NULL) { |
Arnaldo Carvalho de Melo | 454a3bb | 2011-01-04 10:40:08 -0200 | [diff] [blame] | 289 | pr_debug("perf_evsel__new\n"); |
Arnaldo Carvalho de Melo | d854861 | 2011-01-04 00:16:20 -0200 | [diff] [blame] | 290 | goto out_thread_map_delete; |
| 291 | } |
| 292 | |
Arnaldo Carvalho de Melo | 5d2cd90 | 2011-04-14 11:20:14 -0300 | [diff] [blame] | 293 | if (perf_evsel__open_per_thread(evsel, threads, false) < 0) { |
Arnaldo Carvalho de Melo | 454a3bb | 2011-01-04 10:40:08 -0200 | [diff] [blame] | 294 | pr_debug("failed to open counter: %s, " |
| 295 | "tweak /proc/sys/kernel/perf_event_paranoid?\n", |
| 296 | strerror(errno)); |
Arnaldo Carvalho de Melo | d854861 | 2011-01-04 00:16:20 -0200 | [diff] [blame] | 297 | goto out_evsel_delete; |
| 298 | } |
| 299 | |
| 300 | for (i = 0; i < nr_open_calls; ++i) { |
| 301 | fd = open("/etc/passwd", O_RDONLY); |
| 302 | close(fd); |
| 303 | } |
| 304 | |
| 305 | if (perf_evsel__read_on_cpu(evsel, 0, 0) < 0) { |
Arnaldo Carvalho de Melo | 5d2cd90 | 2011-04-14 11:20:14 -0300 | [diff] [blame] | 306 | pr_debug("perf_evsel__read_on_cpu\n"); |
Arnaldo Carvalho de Melo | d854861 | 2011-01-04 00:16:20 -0200 | [diff] [blame] | 307 | goto out_close_fd; |
| 308 | } |
| 309 | |
Arnaldo Carvalho de Melo | 454a3bb | 2011-01-04 10:40:08 -0200 | [diff] [blame] | 310 | if (evsel->counts->cpu[0].val != nr_open_calls) { |
Arnaldo Carvalho de Melo | 9486aa3 | 2011-01-22 20:37:02 -0200 | [diff] [blame] | 311 | pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n", |
Arnaldo Carvalho de Melo | d854861 | 2011-01-04 00:16:20 -0200 | [diff] [blame] | 312 | nr_open_calls, evsel->counts->cpu[0].val); |
Arnaldo Carvalho de Melo | 454a3bb | 2011-01-04 10:40:08 -0200 | [diff] [blame] | 313 | goto out_close_fd; |
| 314 | } |
Arnaldo Carvalho de Melo | d854861 | 2011-01-04 00:16:20 -0200 | [diff] [blame] | 315 | |
| 316 | err = 0; |
| 317 | out_close_fd: |
| 318 | perf_evsel__close_fd(evsel, 1, threads->nr); |
| 319 | out_evsel_delete: |
| 320 | perf_evsel__delete(evsel); |
| 321 | out_thread_map_delete: |
| 322 | thread_map__delete(threads); |
| 323 | return err; |
| 324 | } |
| 325 | |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 326 | #include <sched.h> |
| 327 | |
| 328 | static int test__open_syscall_event_on_all_cpus(void) |
| 329 | { |
| 330 | int err = -1, fd, cpu; |
| 331 | struct thread_map *threads; |
| 332 | struct cpu_map *cpus; |
| 333 | struct perf_evsel *evsel; |
| 334 | struct perf_event_attr attr; |
| 335 | unsigned int nr_open_calls = 111, i; |
Arnaldo Carvalho de Melo | 57b84e5 | 2011-01-22 23:14:20 -0200 | [diff] [blame] | 336 | cpu_set_t cpu_set; |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 337 | int id = trace_event__id("sys_enter_open"); |
| 338 | |
| 339 | if (id < 0) { |
| 340 | pr_debug("is debugfs mounted on /sys/kernel/debug?\n"); |
| 341 | return -1; |
| 342 | } |
| 343 | |
| 344 | threads = thread_map__new(-1, getpid()); |
| 345 | if (threads == NULL) { |
| 346 | pr_debug("thread_map__new\n"); |
| 347 | return -1; |
| 348 | } |
| 349 | |
| 350 | cpus = cpu_map__new(NULL); |
Han Pingtian | 98d77b7 | 2011-01-15 07:00:50 +0800 | [diff] [blame] | 351 | if (cpus == NULL) { |
| 352 | pr_debug("cpu_map__new\n"); |
| 353 | goto out_thread_map_delete; |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 354 | } |
| 355 | |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 356 | |
Arnaldo Carvalho de Melo | 57b84e5 | 2011-01-22 23:14:20 -0200 | [diff] [blame] | 357 | CPU_ZERO(&cpu_set); |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 358 | |
| 359 | memset(&attr, 0, sizeof(attr)); |
| 360 | attr.type = PERF_TYPE_TRACEPOINT; |
| 361 | attr.config = id; |
| 362 | evsel = perf_evsel__new(&attr, 0); |
| 363 | if (evsel == NULL) { |
| 364 | pr_debug("perf_evsel__new\n"); |
Arnaldo Carvalho de Melo | 57b84e5 | 2011-01-22 23:14:20 -0200 | [diff] [blame] | 365 | goto out_thread_map_delete; |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 366 | } |
| 367 | |
Arnaldo Carvalho de Melo | 5d2cd90 | 2011-04-14 11:20:14 -0300 | [diff] [blame] | 368 | if (perf_evsel__open(evsel, cpus, threads, false) < 0) { |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 369 | pr_debug("failed to open counter: %s, " |
| 370 | "tweak /proc/sys/kernel/perf_event_paranoid?\n", |
| 371 | strerror(errno)); |
| 372 | goto out_evsel_delete; |
| 373 | } |
| 374 | |
| 375 | for (cpu = 0; cpu < cpus->nr; ++cpu) { |
| 376 | unsigned int ncalls = nr_open_calls + cpu; |
Arnaldo Carvalho de Melo | 57b84e5 | 2011-01-22 23:14:20 -0200 | [diff] [blame] | 377 | /* |
| 378 | * XXX eventually lift this restriction in a way that |
| 379 | * keeps perf building on older glibc installations |
| 380 | * without CPU_ALLOC. 1024 cpus in 2010 still seems |
| 381 | * a reasonable upper limit tho :-) |
| 382 | */ |
| 383 | if (cpus->map[cpu] >= CPU_SETSIZE) { |
| 384 | pr_debug("Ignoring CPU %d\n", cpus->map[cpu]); |
| 385 | continue; |
| 386 | } |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 387 | |
Arnaldo Carvalho de Melo | 57b84e5 | 2011-01-22 23:14:20 -0200 | [diff] [blame] | 388 | CPU_SET(cpus->map[cpu], &cpu_set); |
| 389 | if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) { |
Han Pingtian | ffb5e0f | 2011-01-20 19:47:07 +0800 | [diff] [blame] | 390 | pr_debug("sched_setaffinity() failed on CPU %d: %s ", |
| 391 | cpus->map[cpu], |
| 392 | strerror(errno)); |
| 393 | goto out_close_fd; |
| 394 | } |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 395 | for (i = 0; i < ncalls; ++i) { |
| 396 | fd = open("/etc/passwd", O_RDONLY); |
| 397 | close(fd); |
| 398 | } |
Arnaldo Carvalho de Melo | 57b84e5 | 2011-01-22 23:14:20 -0200 | [diff] [blame] | 399 | CPU_CLR(cpus->map[cpu], &cpu_set); |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 400 | } |
| 401 | |
| 402 | /* |
| 403 | * Here we need to explicitely preallocate the counts, as if |
| 404 | * we use the auto allocation it will allocate just for 1 cpu, |
| 405 | * as we start by cpu 0. |
| 406 | */ |
| 407 | if (perf_evsel__alloc_counts(evsel, cpus->nr) < 0) { |
| 408 | pr_debug("perf_evsel__alloc_counts(ncpus=%d)\n", cpus->nr); |
| 409 | goto out_close_fd; |
| 410 | } |
| 411 | |
Arnaldo Carvalho de Melo | d2af968 | 2011-01-14 16:24:49 -0200 | [diff] [blame] | 412 | err = 0; |
| 413 | |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 414 | for (cpu = 0; cpu < cpus->nr; ++cpu) { |
| 415 | unsigned int expected; |
| 416 | |
Arnaldo Carvalho de Melo | 57b84e5 | 2011-01-22 23:14:20 -0200 | [diff] [blame] | 417 | if (cpus->map[cpu] >= CPU_SETSIZE) |
| 418 | continue; |
| 419 | |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 420 | if (perf_evsel__read_on_cpu(evsel, cpu, 0) < 0) { |
Arnaldo Carvalho de Melo | 5d2cd90 | 2011-04-14 11:20:14 -0300 | [diff] [blame] | 421 | pr_debug("perf_evsel__read_on_cpu\n"); |
Arnaldo Carvalho de Melo | d2af968 | 2011-01-14 16:24:49 -0200 | [diff] [blame] | 422 | err = -1; |
| 423 | break; |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 424 | } |
| 425 | |
| 426 | expected = nr_open_calls + cpu; |
| 427 | if (evsel->counts->cpu[cpu].val != expected) { |
Arnaldo Carvalho de Melo | 9486aa3 | 2011-01-22 20:37:02 -0200 | [diff] [blame] | 428 | pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls on cpu %d, got %" PRIu64 "\n", |
Han Pingtian | ffb5e0f | 2011-01-20 19:47:07 +0800 | [diff] [blame] | 429 | expected, cpus->map[cpu], evsel->counts->cpu[cpu].val); |
Arnaldo Carvalho de Melo | d2af968 | 2011-01-14 16:24:49 -0200 | [diff] [blame] | 430 | err = -1; |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 431 | } |
| 432 | } |
| 433 | |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 434 | out_close_fd: |
| 435 | perf_evsel__close_fd(evsel, 1, threads->nr); |
| 436 | out_evsel_delete: |
| 437 | perf_evsel__delete(evsel); |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 438 | out_thread_map_delete: |
| 439 | thread_map__delete(threads); |
| 440 | return err; |
| 441 | } |
| 442 | |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 443 | /* |
| 444 | * This test will generate random numbers of calls to some getpid syscalls, |
| 445 | * then establish an mmap for a group of events that are created to monitor |
| 446 | * the syscalls. |
| 447 | * |
| 448 | * It will receive the events, using mmap, use its PERF_SAMPLE_ID generated |
| 449 | * sample.id field to map back to its respective perf_evsel instance. |
| 450 | * |
| 451 | * Then it checks if the number of syscalls reported as perf events by |
| 452 | * the kernel corresponds to the number of syscalls made. |
| 453 | */ |
| 454 | static int test__basic_mmap(void) |
| 455 | { |
| 456 | int err = -1; |
Arnaldo Carvalho de Melo | 8115d60 | 2011-01-29 14:01:45 -0200 | [diff] [blame] | 457 | union perf_event *event; |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 458 | struct thread_map *threads; |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 459 | struct cpu_map *cpus; |
| 460 | struct perf_evlist *evlist; |
| 461 | struct perf_event_attr attr = { |
| 462 | .type = PERF_TYPE_TRACEPOINT, |
| 463 | .read_format = PERF_FORMAT_ID, |
| 464 | .sample_type = PERF_SAMPLE_ID, |
| 465 | .watermark = 0, |
| 466 | }; |
| 467 | cpu_set_t cpu_set; |
| 468 | const char *syscall_names[] = { "getsid", "getppid", "getpgrp", |
| 469 | "getpgid", }; |
| 470 | pid_t (*syscalls[])(void) = { (void *)getsid, getppid, getpgrp, |
| 471 | (void*)getpgid }; |
| 472 | #define nsyscalls ARRAY_SIZE(syscall_names) |
| 473 | int ids[nsyscalls]; |
| 474 | unsigned int nr_events[nsyscalls], |
| 475 | expected_nr_events[nsyscalls], i, j; |
| 476 | struct perf_evsel *evsels[nsyscalls], *evsel; |
Frederic Weisbecker | a285412 | 2011-05-21 19:33:04 +0200 | [diff] [blame] | 477 | int sample_size = perf_sample_size(attr.sample_type); |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 478 | |
| 479 | for (i = 0; i < nsyscalls; ++i) { |
| 480 | char name[64]; |
| 481 | |
| 482 | snprintf(name, sizeof(name), "sys_enter_%s", syscall_names[i]); |
| 483 | ids[i] = trace_event__id(name); |
| 484 | if (ids[i] < 0) { |
| 485 | pr_debug("Is debugfs mounted on /sys/kernel/debug?\n"); |
| 486 | return -1; |
| 487 | } |
| 488 | nr_events[i] = 0; |
| 489 | expected_nr_events[i] = random() % 257; |
| 490 | } |
| 491 | |
| 492 | threads = thread_map__new(-1, getpid()); |
| 493 | if (threads == NULL) { |
| 494 | pr_debug("thread_map__new\n"); |
| 495 | return -1; |
| 496 | } |
| 497 | |
| 498 | cpus = cpu_map__new(NULL); |
Han Pingtian | 54489c18 | 2011-01-25 07:39:00 +0800 | [diff] [blame] | 499 | if (cpus == NULL) { |
| 500 | pr_debug("cpu_map__new\n"); |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 501 | goto out_free_threads; |
| 502 | } |
| 503 | |
| 504 | CPU_ZERO(&cpu_set); |
| 505 | CPU_SET(cpus->map[0], &cpu_set); |
| 506 | sched_setaffinity(0, sizeof(cpu_set), &cpu_set); |
| 507 | if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) { |
| 508 | pr_debug("sched_setaffinity() failed on CPU %d: %s ", |
| 509 | cpus->map[0], strerror(errno)); |
| 510 | goto out_free_cpus; |
| 511 | } |
| 512 | |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 513 | evlist = perf_evlist__new(cpus, threads); |
Han Pingtian | 54489c18 | 2011-01-25 07:39:00 +0800 | [diff] [blame] | 514 | if (evlist == NULL) { |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 515 | pr_debug("perf_evlist__new\n"); |
| 516 | goto out_free_cpus; |
| 517 | } |
| 518 | |
| 519 | /* anonymous union fields, can't be initialized above */ |
| 520 | attr.wakeup_events = 1; |
| 521 | attr.sample_period = 1; |
| 522 | |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 523 | for (i = 0; i < nsyscalls; ++i) { |
| 524 | attr.config = ids[i]; |
| 525 | evsels[i] = perf_evsel__new(&attr, i); |
| 526 | if (evsels[i] == NULL) { |
| 527 | pr_debug("perf_evsel__new\n"); |
| 528 | goto out_free_evlist; |
| 529 | } |
| 530 | |
| 531 | perf_evlist__add(evlist, evsels[i]); |
| 532 | |
Arnaldo Carvalho de Melo | 5d2cd90 | 2011-04-14 11:20:14 -0300 | [diff] [blame] | 533 | if (perf_evsel__open(evsels[i], cpus, threads, false) < 0) { |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 534 | pr_debug("failed to open counter: %s, " |
| 535 | "tweak /proc/sys/kernel/perf_event_paranoid?\n", |
| 536 | strerror(errno)); |
| 537 | goto out_close_fd; |
| 538 | } |
| 539 | } |
| 540 | |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 541 | if (perf_evlist__mmap(evlist, 128, true) < 0) { |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 542 | pr_debug("failed to mmap events: %d (%s)\n", errno, |
| 543 | strerror(errno)); |
| 544 | goto out_close_fd; |
| 545 | } |
| 546 | |
| 547 | for (i = 0; i < nsyscalls; ++i) |
| 548 | for (j = 0; j < expected_nr_events[i]; ++j) { |
| 549 | int foo = syscalls[i](); |
| 550 | ++foo; |
| 551 | } |
| 552 | |
Arnaldo Carvalho de Melo | aece948 | 2011-05-15 09:39:00 -0300 | [diff] [blame] | 553 | while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) { |
Arnaldo Carvalho de Melo | 8d50e5b | 2011-01-29 13:02:00 -0200 | [diff] [blame] | 554 | struct perf_sample sample; |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 555 | |
| 556 | if (event->header.type != PERF_RECORD_SAMPLE) { |
| 557 | pr_debug("unexpected %s event\n", |
Arnaldo Carvalho de Melo | 8115d60 | 2011-01-29 14:01:45 -0200 | [diff] [blame] | 558 | perf_event__name(event->header.type)); |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 559 | goto out_munmap; |
| 560 | } |
| 561 | |
Frederic Weisbecker | 5538bec | 2011-05-22 02:17:22 +0200 | [diff] [blame] | 562 | err = perf_event__parse_sample(event, attr.sample_type, sample_size, |
| 563 | false, &sample); |
| 564 | if (err) { |
| 565 | pr_err("Can't parse sample, err = %d\n", err); |
| 566 | goto out_munmap; |
| 567 | } |
| 568 | |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 569 | evsel = perf_evlist__id2evsel(evlist, sample.id); |
| 570 | if (evsel == NULL) { |
| 571 | pr_debug("event with id %" PRIu64 |
| 572 | " doesn't map to an evsel\n", sample.id); |
| 573 | goto out_munmap; |
| 574 | } |
| 575 | nr_events[evsel->idx]++; |
| 576 | } |
| 577 | |
| 578 | list_for_each_entry(evsel, &evlist->entries, node) { |
| 579 | if (nr_events[evsel->idx] != expected_nr_events[evsel->idx]) { |
| 580 | pr_debug("expected %d %s events, got %d\n", |
| 581 | expected_nr_events[evsel->idx], |
| 582 | event_name(evsel), nr_events[evsel->idx]); |
| 583 | goto out_munmap; |
| 584 | } |
| 585 | } |
| 586 | |
| 587 | err = 0; |
| 588 | out_munmap: |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 589 | perf_evlist__munmap(evlist); |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 590 | out_close_fd: |
| 591 | for (i = 0; i < nsyscalls; ++i) |
| 592 | perf_evsel__close_fd(evsels[i], 1, threads->nr); |
| 593 | out_free_evlist: |
| 594 | perf_evlist__delete(evlist); |
| 595 | out_free_cpus: |
| 596 | cpu_map__delete(cpus); |
| 597 | out_free_threads: |
| 598 | thread_map__delete(threads); |
| 599 | return err; |
| 600 | #undef nsyscalls |
| 601 | } |
| 602 | |
Arnaldo Carvalho de Melo | 1c6a800 | 2010-04-29 18:58:32 -0300 | [diff] [blame] | 603 | static struct test { |
| 604 | const char *desc; |
| 605 | int (*func)(void); |
| 606 | } tests[] = { |
| 607 | { |
| 608 | .desc = "vmlinux symtab matches kallsyms", |
| 609 | .func = test__vmlinux_matches_kallsyms, |
| 610 | }, |
| 611 | { |
Arnaldo Carvalho de Melo | d854861 | 2011-01-04 00:16:20 -0200 | [diff] [blame] | 612 | .desc = "detect open syscall event", |
| 613 | .func = test__open_syscall_event, |
| 614 | }, |
| 615 | { |
Arnaldo Carvalho de Melo | 0252208 | 2011-01-04 11:55:27 -0200 | [diff] [blame] | 616 | .desc = "detect open syscall event on all cpus", |
| 617 | .func = test__open_syscall_event_on_all_cpus, |
| 618 | }, |
| 619 | { |
Arnaldo Carvalho de Melo | de5fa3a | 2011-01-15 10:42:46 -0200 | [diff] [blame] | 620 | .desc = "read samples using the mmap interface", |
| 621 | .func = test__basic_mmap, |
| 622 | }, |
| 623 | { |
Arnaldo Carvalho de Melo | 1c6a800 | 2010-04-29 18:58:32 -0300 | [diff] [blame] | 624 | .func = NULL, |
| 625 | }, |
| 626 | }; |
| 627 | |
| 628 | static int __cmd_test(void) |
| 629 | { |
| 630 | int i = 0; |
| 631 | |
| 632 | page_size = sysconf(_SC_PAGE_SIZE); |
| 633 | |
| 634 | while (tests[i].func) { |
| 635 | int err; |
| 636 | pr_info("%2d: %s:", i + 1, tests[i].desc); |
| 637 | pr_debug("\n--- start ---\n"); |
| 638 | err = tests[i].func(); |
| 639 | pr_debug("---- end ----\n%s:", tests[i].desc); |
| 640 | pr_info(" %s\n", err ? "FAILED!\n" : "Ok"); |
| 641 | ++i; |
| 642 | } |
| 643 | |
| 644 | return 0; |
| 645 | } |
| 646 | |
| 647 | static const char * const test_usage[] = { |
| 648 | "perf test [<options>]", |
| 649 | NULL, |
| 650 | }; |
| 651 | |
| 652 | static const struct option test_options[] = { |
Arnaldo Carvalho de Melo | 8035458 | 2010-05-17 15:51:10 -0300 | [diff] [blame] | 653 | OPT_INTEGER('v', "verbose", &verbose, |
Arnaldo Carvalho de Melo | 1c6a800 | 2010-04-29 18:58:32 -0300 | [diff] [blame] | 654 | "be more verbose (show symbol address, etc)"), |
| 655 | OPT_END() |
| 656 | }; |
| 657 | |
| 658 | int cmd_test(int argc, const char **argv, const char *prefix __used) |
| 659 | { |
| 660 | argc = parse_options(argc, argv, test_options, test_usage, 0); |
| 661 | if (argc) |
| 662 | usage_with_options(test_usage, test_options); |
| 663 | |
| 664 | symbol_conf.priv_size = sizeof(int); |
| 665 | symbol_conf.sort_by_name = true; |
| 666 | symbol_conf.try_vmlinux_path = true; |
| 667 | |
| 668 | if (symbol__init() < 0) |
| 669 | return -1; |
| 670 | |
| 671 | setup_pager(); |
| 672 | |
| 673 | return __cmd_test(); |
| 674 | } |