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Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -03001/*
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 Meloebf294b2011-11-16 14:03:07 -020010#include "util/debugfs.h"
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -020011#include "util/evlist.h"
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -030012#include "util/parse-options.h"
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -020013#include "util/parse-events.h"
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -030014#include "util/symbol.h"
Arnaldo Carvalho de Melofd782602011-01-18 15:15:24 -020015#include "util/thread_map.h"
Jiri Olsa13b62562011-07-14 11:25:33 +020016#include "../../include/linux/hw_breakpoint.h"
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -030017
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -030018static 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
25static 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;
Arnaldo Carvalho de Meloe60770a2011-11-29 12:52:07 -020033 long page_size = sysconf(_SC_PAGE_SIZE);
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -030034 struct ref_reloc_sym ref_reloc_sym = { .name = "_stext", };
35
36 /*
37 * Step 1:
38 *
39 * Init the machines that will hold kernel, modules obtained from
40 * both vmlinux + .ko files and from /proc/kallsyms split by modules.
41 */
42 machine__init(&kallsyms, "", HOST_KERNEL_ID);
43 machine__init(&vmlinux, "", HOST_KERNEL_ID);
44
45 /*
46 * Step 2:
47 *
48 * Create the kernel maps for kallsyms and the DSO where we will then
49 * load /proc/kallsyms. Also create the modules maps from /proc/modules
50 * and find the .ko files that match them in /lib/modules/`uname -r`/.
51 */
52 if (machine__create_kernel_maps(&kallsyms) < 0) {
53 pr_debug("machine__create_kernel_maps ");
54 return -1;
55 }
56
57 /*
58 * Step 3:
59 *
60 * Load and split /proc/kallsyms into multiple maps, one per module.
61 */
62 if (machine__load_kallsyms(&kallsyms, "/proc/kallsyms", type, NULL) <= 0) {
63 pr_debug("dso__load_kallsyms ");
64 goto out;
65 }
66
67 /*
68 * Step 4:
69 *
70 * kallsyms will be internally on demand sorted by name so that we can
71 * find the reference relocation * symbol, i.e. the symbol we will use
72 * to see if the running kernel was relocated by checking if it has the
73 * same value in the vmlinux file we load.
74 */
75 kallsyms_map = machine__kernel_map(&kallsyms, type);
76
77 sym = map__find_symbol_by_name(kallsyms_map, ref_reloc_sym.name, NULL);
78 if (sym == NULL) {
79 pr_debug("dso__find_symbol_by_name ");
80 goto out;
81 }
82
83 ref_reloc_sym.addr = sym->start;
84
85 /*
86 * Step 5:
87 *
88 * Now repeat step 2, this time for the vmlinux file we'll auto-locate.
89 */
90 if (machine__create_kernel_maps(&vmlinux) < 0) {
91 pr_debug("machine__create_kernel_maps ");
92 goto out;
93 }
94
95 vmlinux_map = machine__kernel_map(&vmlinux, type);
96 map__kmap(vmlinux_map)->ref_reloc_sym = &ref_reloc_sym;
97
98 /*
99 * Step 6:
100 *
101 * Locate a vmlinux file in the vmlinux path that has a buildid that
102 * matches the one of the running kernel.
103 *
104 * While doing that look if we find the ref reloc symbol, if we find it
105 * we'll have its ref_reloc_symbol.unrelocated_addr and then
106 * maps__reloc_vmlinux will notice and set proper ->[un]map_ip routines
107 * to fixup the symbols.
108 */
109 if (machine__load_vmlinux_path(&vmlinux, type,
110 vmlinux_matches_kallsyms_filter) <= 0) {
111 pr_debug("machine__load_vmlinux_path ");
112 goto out;
113 }
114
115 err = 0;
116 /*
117 * Step 7:
118 *
119 * Now look at the symbols in the vmlinux DSO and check if we find all of them
120 * in the kallsyms dso. For the ones that are in both, check its names and
121 * end addresses too.
122 */
123 for (nd = rb_first(&vmlinux_map->dso->symbols[type]); nd; nd = rb_next(nd)) {
Arnaldo Carvalho de Melod3678752010-12-21 23:38:37 -0200124 struct symbol *pair, *first_pair;
125 bool backwards = true;
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -0300126
127 sym = rb_entry(nd, struct symbol, rb_node);
Arnaldo Carvalho de Melod3678752010-12-21 23:38:37 -0200128
129 if (sym->start == sym->end)
130 continue;
131
132 first_pair = machine__find_kernel_symbol(&kallsyms, type, sym->start, NULL, NULL);
133 pair = first_pair;
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -0300134
135 if (pair && pair->start == sym->start) {
136next_pair:
137 if (strcmp(sym->name, pair->name) == 0) {
138 /*
139 * kallsyms don't have the symbol end, so we
140 * set that by using the next symbol start - 1,
141 * in some cases we get this up to a page
142 * wrong, trace_kmalloc when I was developing
143 * this code was one such example, 2106 bytes
144 * off the real size. More than that and we
145 * _really_ have a problem.
146 */
147 s64 skew = sym->end - pair->end;
148 if (llabs(skew) < page_size)
149 continue;
150
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200151 pr_debug("%#" PRIx64 ": diff end addr for %s v: %#" PRIx64 " k: %#" PRIx64 "\n",
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -0300152 sym->start, sym->name, sym->end, pair->end);
153 } else {
Arnaldo Carvalho de Melod3678752010-12-21 23:38:37 -0200154 struct rb_node *nnd;
155detour:
156 nnd = backwards ? rb_prev(&pair->rb_node) :
157 rb_next(&pair->rb_node);
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -0300158 if (nnd) {
159 struct symbol *next = rb_entry(nnd, struct symbol, rb_node);
160
161 if (next->start == sym->start) {
162 pair = next;
163 goto next_pair;
164 }
165 }
Arnaldo Carvalho de Melod3678752010-12-21 23:38:37 -0200166
167 if (backwards) {
168 backwards = false;
169 pair = first_pair;
170 goto detour;
171 }
172
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200173 pr_debug("%#" PRIx64 ": diff name v: %s k: %s\n",
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -0300174 sym->start, sym->name, pair->name);
175 }
176 } else
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200177 pr_debug("%#" PRIx64 ": %s not on kallsyms\n", sym->start, sym->name);
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -0300178
179 err = -1;
180 }
181
182 if (!verbose)
183 goto out;
184
185 pr_info("Maps only in vmlinux:\n");
186
187 for (nd = rb_first(&vmlinux.kmaps.maps[type]); nd; nd = rb_next(nd)) {
188 struct map *pos = rb_entry(nd, struct map, rb_node), *pair;
189 /*
190 * If it is the kernel, kallsyms is always "[kernel.kallsyms]", while
191 * the kernel will have the path for the vmlinux file being used,
192 * so use the short name, less descriptive but the same ("[kernel]" in
193 * both cases.
194 */
195 pair = map_groups__find_by_name(&kallsyms.kmaps, type,
196 (pos->dso->kernel ?
197 pos->dso->short_name :
198 pos->dso->name));
199 if (pair)
200 pair->priv = 1;
201 else
202 map__fprintf(pos, stderr);
203 }
204
205 pr_info("Maps in vmlinux with a different name in kallsyms:\n");
206
207 for (nd = rb_first(&vmlinux.kmaps.maps[type]); nd; nd = rb_next(nd)) {
208 struct map *pos = rb_entry(nd, struct map, rb_node), *pair;
209
210 pair = map_groups__find(&kallsyms.kmaps, type, pos->start);
211 if (pair == NULL || pair->priv)
212 continue;
213
214 if (pair->start == pos->start) {
215 pair->priv = 1;
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200216 pr_info(" %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s in kallsyms as",
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -0300217 pos->start, pos->end, pos->pgoff, pos->dso->name);
218 if (pos->pgoff != pair->pgoff || pos->end != pair->end)
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200219 pr_info(": \n*%" PRIx64 "-%" PRIx64 " %" PRIx64 "",
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -0300220 pair->start, pair->end, pair->pgoff);
221 pr_info(" %s\n", pair->dso->name);
222 pair->priv = 1;
223 }
224 }
225
226 pr_info("Maps only in kallsyms:\n");
227
228 for (nd = rb_first(&kallsyms.kmaps.maps[type]);
229 nd; nd = rb_next(nd)) {
230 struct map *pos = rb_entry(nd, struct map, rb_node);
231
232 if (!pos->priv)
233 map__fprintf(pos, stderr);
234 }
235out:
236 return err;
237}
238
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200239#include "util/cpumap.h"
Arnaldo Carvalho de Melod8548612011-01-04 00:16:20 -0200240#include "util/evsel.h"
241#include <sys/types.h>
242
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -0200243static int trace_event__id(const char *evname)
Arnaldo Carvalho de Melod8548612011-01-04 00:16:20 -0200244{
245 char *filename;
246 int err = -1, fd;
247
248 if (asprintf(&filename,
Jiri Olsabaf040a2011-07-14 11:25:34 +0200249 "%s/syscalls/%s/id",
Arnaldo Carvalho de Meloebf294b2011-11-16 14:03:07 -0200250 tracing_events_path, evname) < 0)
Arnaldo Carvalho de Melod8548612011-01-04 00:16:20 -0200251 return -1;
252
253 fd = open(filename, O_RDONLY);
254 if (fd >= 0) {
255 char id[16];
256 if (read(fd, id, sizeof(id)) > 0)
257 err = atoi(id);
258 close(fd);
259 }
260
261 free(filename);
262 return err;
263}
264
265static int test__open_syscall_event(void)
266{
267 int err = -1, fd;
268 struct thread_map *threads;
269 struct perf_evsel *evsel;
Lin Ming23a2f3a2011-01-07 11:11:09 +0800270 struct perf_event_attr attr;
Arnaldo Carvalho de Melod8548612011-01-04 00:16:20 -0200271 unsigned int nr_open_calls = 111, i;
272 int id = trace_event__id("sys_enter_open");
273
274 if (id < 0) {
Arnaldo Carvalho de Melo454a3bb2011-01-04 10:40:08 -0200275 pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
Arnaldo Carvalho de Melod8548612011-01-04 00:16:20 -0200276 return -1;
277 }
278
279 threads = thread_map__new(-1, getpid());
280 if (threads == NULL) {
Arnaldo Carvalho de Melo454a3bb2011-01-04 10:40:08 -0200281 pr_debug("thread_map__new\n");
Arnaldo Carvalho de Melod8548612011-01-04 00:16:20 -0200282 return -1;
283 }
284
Lin Ming23a2f3a2011-01-07 11:11:09 +0800285 memset(&attr, 0, sizeof(attr));
286 attr.type = PERF_TYPE_TRACEPOINT;
287 attr.config = id;
288 evsel = perf_evsel__new(&attr, 0);
Arnaldo Carvalho de Melod8548612011-01-04 00:16:20 -0200289 if (evsel == NULL) {
Arnaldo Carvalho de Melo454a3bb2011-01-04 10:40:08 -0200290 pr_debug("perf_evsel__new\n");
Arnaldo Carvalho de Melod8548612011-01-04 00:16:20 -0200291 goto out_thread_map_delete;
292 }
293
Arnaldo Carvalho de Melo727ab042011-10-25 10:42:19 -0200294 if (perf_evsel__open_per_thread(evsel, threads, false, NULL) < 0) {
Arnaldo Carvalho de Melo454a3bb2011-01-04 10:40:08 -0200295 pr_debug("failed to open counter: %s, "
296 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
297 strerror(errno));
Arnaldo Carvalho de Melod8548612011-01-04 00:16:20 -0200298 goto out_evsel_delete;
299 }
300
301 for (i = 0; i < nr_open_calls; ++i) {
302 fd = open("/etc/passwd", O_RDONLY);
303 close(fd);
304 }
305
306 if (perf_evsel__read_on_cpu(evsel, 0, 0) < 0) {
Arnaldo Carvalho de Melo5d2cd902011-04-14 11:20:14 -0300307 pr_debug("perf_evsel__read_on_cpu\n");
Arnaldo Carvalho de Melod8548612011-01-04 00:16:20 -0200308 goto out_close_fd;
309 }
310
Arnaldo Carvalho de Melo454a3bb2011-01-04 10:40:08 -0200311 if (evsel->counts->cpu[0].val != nr_open_calls) {
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200312 pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n",
Arnaldo Carvalho de Melod8548612011-01-04 00:16:20 -0200313 nr_open_calls, evsel->counts->cpu[0].val);
Arnaldo Carvalho de Melo454a3bb2011-01-04 10:40:08 -0200314 goto out_close_fd;
315 }
Arnaldo Carvalho de Melod8548612011-01-04 00:16:20 -0200316
317 err = 0;
318out_close_fd:
319 perf_evsel__close_fd(evsel, 1, threads->nr);
320out_evsel_delete:
321 perf_evsel__delete(evsel);
322out_thread_map_delete:
323 thread_map__delete(threads);
324 return err;
325}
326
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200327#include <sched.h>
328
329static int test__open_syscall_event_on_all_cpus(void)
330{
331 int err = -1, fd, cpu;
332 struct thread_map *threads;
333 struct cpu_map *cpus;
334 struct perf_evsel *evsel;
335 struct perf_event_attr attr;
336 unsigned int nr_open_calls = 111, i;
Arnaldo Carvalho de Melo57b84e52011-01-22 23:14:20 -0200337 cpu_set_t cpu_set;
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200338 int id = trace_event__id("sys_enter_open");
339
340 if (id < 0) {
341 pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
342 return -1;
343 }
344
345 threads = thread_map__new(-1, getpid());
346 if (threads == NULL) {
347 pr_debug("thread_map__new\n");
348 return -1;
349 }
350
351 cpus = cpu_map__new(NULL);
Han Pingtian98d77b72011-01-15 07:00:50 +0800352 if (cpus == NULL) {
353 pr_debug("cpu_map__new\n");
354 goto out_thread_map_delete;
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200355 }
356
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200357
Arnaldo Carvalho de Melo57b84e52011-01-22 23:14:20 -0200358 CPU_ZERO(&cpu_set);
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200359
360 memset(&attr, 0, sizeof(attr));
361 attr.type = PERF_TYPE_TRACEPOINT;
362 attr.config = id;
363 evsel = perf_evsel__new(&attr, 0);
364 if (evsel == NULL) {
365 pr_debug("perf_evsel__new\n");
Arnaldo Carvalho de Melo57b84e52011-01-22 23:14:20 -0200366 goto out_thread_map_delete;
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200367 }
368
Arnaldo Carvalho de Melo727ab042011-10-25 10:42:19 -0200369 if (perf_evsel__open(evsel, cpus, threads, false, NULL) < 0) {
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200370 pr_debug("failed to open counter: %s, "
371 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
372 strerror(errno));
373 goto out_evsel_delete;
374 }
375
376 for (cpu = 0; cpu < cpus->nr; ++cpu) {
377 unsigned int ncalls = nr_open_calls + cpu;
Arnaldo Carvalho de Melo57b84e52011-01-22 23:14:20 -0200378 /*
379 * XXX eventually lift this restriction in a way that
380 * keeps perf building on older glibc installations
381 * without CPU_ALLOC. 1024 cpus in 2010 still seems
382 * a reasonable upper limit tho :-)
383 */
384 if (cpus->map[cpu] >= CPU_SETSIZE) {
385 pr_debug("Ignoring CPU %d\n", cpus->map[cpu]);
386 continue;
387 }
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200388
Arnaldo Carvalho de Melo57b84e52011-01-22 23:14:20 -0200389 CPU_SET(cpus->map[cpu], &cpu_set);
390 if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
Han Pingtianffb5e0f2011-01-20 19:47:07 +0800391 pr_debug("sched_setaffinity() failed on CPU %d: %s ",
392 cpus->map[cpu],
393 strerror(errno));
394 goto out_close_fd;
395 }
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200396 for (i = 0; i < ncalls; ++i) {
397 fd = open("/etc/passwd", O_RDONLY);
398 close(fd);
399 }
Arnaldo Carvalho de Melo57b84e52011-01-22 23:14:20 -0200400 CPU_CLR(cpus->map[cpu], &cpu_set);
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200401 }
402
403 /*
404 * Here we need to explicitely preallocate the counts, as if
405 * we use the auto allocation it will allocate just for 1 cpu,
406 * as we start by cpu 0.
407 */
408 if (perf_evsel__alloc_counts(evsel, cpus->nr) < 0) {
409 pr_debug("perf_evsel__alloc_counts(ncpus=%d)\n", cpus->nr);
410 goto out_close_fd;
411 }
412
Arnaldo Carvalho de Melod2af9682011-01-14 16:24:49 -0200413 err = 0;
414
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200415 for (cpu = 0; cpu < cpus->nr; ++cpu) {
416 unsigned int expected;
417
Arnaldo Carvalho de Melo57b84e52011-01-22 23:14:20 -0200418 if (cpus->map[cpu] >= CPU_SETSIZE)
419 continue;
420
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200421 if (perf_evsel__read_on_cpu(evsel, cpu, 0) < 0) {
Arnaldo Carvalho de Melo5d2cd902011-04-14 11:20:14 -0300422 pr_debug("perf_evsel__read_on_cpu\n");
Arnaldo Carvalho de Melod2af9682011-01-14 16:24:49 -0200423 err = -1;
424 break;
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200425 }
426
427 expected = nr_open_calls + cpu;
428 if (evsel->counts->cpu[cpu].val != expected) {
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200429 pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls on cpu %d, got %" PRIu64 "\n",
Han Pingtianffb5e0f2011-01-20 19:47:07 +0800430 expected, cpus->map[cpu], evsel->counts->cpu[cpu].val);
Arnaldo Carvalho de Melod2af9682011-01-14 16:24:49 -0200431 err = -1;
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200432 }
433 }
434
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200435out_close_fd:
436 perf_evsel__close_fd(evsel, 1, threads->nr);
437out_evsel_delete:
438 perf_evsel__delete(evsel);
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -0200439out_thread_map_delete:
440 thread_map__delete(threads);
441 return err;
442}
443
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -0200444/*
445 * This test will generate random numbers of calls to some getpid syscalls,
446 * then establish an mmap for a group of events that are created to monitor
447 * the syscalls.
448 *
449 * It will receive the events, using mmap, use its PERF_SAMPLE_ID generated
450 * sample.id field to map back to its respective perf_evsel instance.
451 *
452 * Then it checks if the number of syscalls reported as perf events by
453 * the kernel corresponds to the number of syscalls made.
454 */
455static int test__basic_mmap(void)
456{
457 int err = -1;
Arnaldo Carvalho de Melo8115d602011-01-29 14:01:45 -0200458 union perf_event *event;
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -0200459 struct thread_map *threads;
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -0200460 struct cpu_map *cpus;
461 struct perf_evlist *evlist;
462 struct perf_event_attr attr = {
463 .type = PERF_TYPE_TRACEPOINT,
464 .read_format = PERF_FORMAT_ID,
465 .sample_type = PERF_SAMPLE_ID,
466 .watermark = 0,
467 };
468 cpu_set_t cpu_set;
469 const char *syscall_names[] = { "getsid", "getppid", "getpgrp",
470 "getpgid", };
471 pid_t (*syscalls[])(void) = { (void *)getsid, getppid, getpgrp,
472 (void*)getpgid };
473#define nsyscalls ARRAY_SIZE(syscall_names)
474 int ids[nsyscalls];
475 unsigned int nr_events[nsyscalls],
476 expected_nr_events[nsyscalls], i, j;
477 struct perf_evsel *evsels[nsyscalls], *evsel;
Arnaldo Carvalho de Meloc2a70652011-06-02 11:04:54 -0300478 int sample_size = __perf_evsel__sample_size(attr.sample_type);
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -0200479
480 for (i = 0; i < nsyscalls; ++i) {
481 char name[64];
482
483 snprintf(name, sizeof(name), "sys_enter_%s", syscall_names[i]);
484 ids[i] = trace_event__id(name);
485 if (ids[i] < 0) {
486 pr_debug("Is debugfs mounted on /sys/kernel/debug?\n");
487 return -1;
488 }
489 nr_events[i] = 0;
490 expected_nr_events[i] = random() % 257;
491 }
492
493 threads = thread_map__new(-1, getpid());
494 if (threads == NULL) {
495 pr_debug("thread_map__new\n");
496 return -1;
497 }
498
499 cpus = cpu_map__new(NULL);
Han Pingtian54489c182011-01-25 07:39:00 +0800500 if (cpus == NULL) {
501 pr_debug("cpu_map__new\n");
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -0200502 goto out_free_threads;
503 }
504
505 CPU_ZERO(&cpu_set);
506 CPU_SET(cpus->map[0], &cpu_set);
507 sched_setaffinity(0, sizeof(cpu_set), &cpu_set);
508 if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
509 pr_debug("sched_setaffinity() failed on CPU %d: %s ",
510 cpus->map[0], strerror(errno));
511 goto out_free_cpus;
512 }
513
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200514 evlist = perf_evlist__new(cpus, threads);
Han Pingtian54489c182011-01-25 07:39:00 +0800515 if (evlist == NULL) {
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -0200516 pr_debug("perf_evlist__new\n");
517 goto out_free_cpus;
518 }
519
520 /* anonymous union fields, can't be initialized above */
521 attr.wakeup_events = 1;
522 attr.sample_period = 1;
523
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -0200524 for (i = 0; i < nsyscalls; ++i) {
525 attr.config = ids[i];
526 evsels[i] = perf_evsel__new(&attr, i);
527 if (evsels[i] == NULL) {
528 pr_debug("perf_evsel__new\n");
529 goto out_free_evlist;
530 }
531
532 perf_evlist__add(evlist, evsels[i]);
533
Arnaldo Carvalho de Melo727ab042011-10-25 10:42:19 -0200534 if (perf_evsel__open(evsels[i], cpus, threads, false, NULL) < 0) {
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -0200535 pr_debug("failed to open counter: %s, "
536 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
537 strerror(errno));
538 goto out_close_fd;
539 }
540 }
541
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200542 if (perf_evlist__mmap(evlist, 128, true) < 0) {
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -0200543 pr_debug("failed to mmap events: %d (%s)\n", errno,
544 strerror(errno));
545 goto out_close_fd;
546 }
547
548 for (i = 0; i < nsyscalls; ++i)
549 for (j = 0; j < expected_nr_events[i]; ++j) {
550 int foo = syscalls[i]();
551 ++foo;
552 }
553
Arnaldo Carvalho de Meloaece9482011-05-15 09:39:00 -0300554 while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
Arnaldo Carvalho de Melo8d50e5b2011-01-29 13:02:00 -0200555 struct perf_sample sample;
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -0200556
557 if (event->header.type != PERF_RECORD_SAMPLE) {
558 pr_debug("unexpected %s event\n",
Arnaldo Carvalho de Melo8115d602011-01-29 14:01:45 -0200559 perf_event__name(event->header.type));
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -0200560 goto out_munmap;
561 }
562
Frederic Weisbecker5538bec2011-05-22 02:17:22 +0200563 err = perf_event__parse_sample(event, attr.sample_type, sample_size,
David Ahern936be502011-09-06 09:12:26 -0600564 false, &sample, false);
Frederic Weisbecker5538bec2011-05-22 02:17:22 +0200565 if (err) {
566 pr_err("Can't parse sample, err = %d\n", err);
567 goto out_munmap;
568 }
569
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -0200570 evsel = perf_evlist__id2evsel(evlist, sample.id);
571 if (evsel == NULL) {
572 pr_debug("event with id %" PRIu64
573 " doesn't map to an evsel\n", sample.id);
574 goto out_munmap;
575 }
576 nr_events[evsel->idx]++;
577 }
578
579 list_for_each_entry(evsel, &evlist->entries, node) {
580 if (nr_events[evsel->idx] != expected_nr_events[evsel->idx]) {
581 pr_debug("expected %d %s events, got %d\n",
582 expected_nr_events[evsel->idx],
583 event_name(evsel), nr_events[evsel->idx]);
584 goto out_munmap;
585 }
586 }
587
588 err = 0;
589out_munmap:
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200590 perf_evlist__munmap(evlist);
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -0200591out_close_fd:
592 for (i = 0; i < nsyscalls; ++i)
593 perf_evsel__close_fd(evsels[i], 1, threads->nr);
594out_free_evlist:
595 perf_evlist__delete(evlist);
596out_free_cpus:
597 cpu_map__delete(cpus);
598out_free_threads:
599 thread_map__delete(threads);
600 return err;
601#undef nsyscalls
602}
603
Jiri Olsa13b62562011-07-14 11:25:33 +0200604#define TEST_ASSERT_VAL(text, cond) \
605do { \
Jiri Olsa65c1e042011-12-15 16:30:39 +0100606 if (!(cond)) { \
Jiri Olsa13b62562011-07-14 11:25:33 +0200607 pr_debug("FAILED %s:%d %s\n", __FILE__, __LINE__, text); \
608 return -1; \
609 } \
610} while (0)
611
612static int test__checkevent_tracepoint(struct perf_evlist *evlist)
613{
614 struct perf_evsel *evsel = list_entry(evlist->entries.next,
615 struct perf_evsel, node);
616
617 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
618 TEST_ASSERT_VAL("wrong type", PERF_TYPE_TRACEPOINT == evsel->attr.type);
619 TEST_ASSERT_VAL("wrong sample_type",
620 (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | PERF_SAMPLE_CPU) ==
621 evsel->attr.sample_type);
622 TEST_ASSERT_VAL("wrong sample_period", 1 == evsel->attr.sample_period);
623 return 0;
624}
625
626static int test__checkevent_tracepoint_multi(struct perf_evlist *evlist)
627{
628 struct perf_evsel *evsel;
629
630 TEST_ASSERT_VAL("wrong number of entries", evlist->nr_entries > 1);
631
632 list_for_each_entry(evsel, &evlist->entries, node) {
633 TEST_ASSERT_VAL("wrong type",
634 PERF_TYPE_TRACEPOINT == evsel->attr.type);
635 TEST_ASSERT_VAL("wrong sample_type",
636 (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | PERF_SAMPLE_CPU)
637 == evsel->attr.sample_type);
638 TEST_ASSERT_VAL("wrong sample_period",
639 1 == evsel->attr.sample_period);
640 }
641 return 0;
642}
643
644static int test__checkevent_raw(struct perf_evlist *evlist)
645{
646 struct perf_evsel *evsel = list_entry(evlist->entries.next,
647 struct perf_evsel, node);
648
649 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
650 TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->attr.type);
651 TEST_ASSERT_VAL("wrong config", 1 == evsel->attr.config);
652 return 0;
653}
654
655static int test__checkevent_numeric(struct perf_evlist *evlist)
656{
657 struct perf_evsel *evsel = list_entry(evlist->entries.next,
658 struct perf_evsel, node);
659
660 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
661 TEST_ASSERT_VAL("wrong type", 1 == evsel->attr.type);
662 TEST_ASSERT_VAL("wrong config", 1 == evsel->attr.config);
663 return 0;
664}
665
666static int test__checkevent_symbolic_name(struct perf_evlist *evlist)
667{
668 struct perf_evsel *evsel = list_entry(evlist->entries.next,
669 struct perf_evsel, node);
670
671 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
672 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
673 TEST_ASSERT_VAL("wrong config",
674 PERF_COUNT_HW_INSTRUCTIONS == evsel->attr.config);
675 return 0;
676}
677
678static int test__checkevent_symbolic_alias(struct perf_evlist *evlist)
679{
680 struct perf_evsel *evsel = list_entry(evlist->entries.next,
681 struct perf_evsel, node);
682
683 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
684 TEST_ASSERT_VAL("wrong type", PERF_TYPE_SOFTWARE == evsel->attr.type);
685 TEST_ASSERT_VAL("wrong config",
686 PERF_COUNT_SW_PAGE_FAULTS == evsel->attr.config);
687 return 0;
688}
689
690static int test__checkevent_genhw(struct perf_evlist *evlist)
691{
692 struct perf_evsel *evsel = list_entry(evlist->entries.next,
693 struct perf_evsel, node);
694
695 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
696 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HW_CACHE == evsel->attr.type);
697 TEST_ASSERT_VAL("wrong config", (1 << 16) == evsel->attr.config);
698 return 0;
699}
700
701static int test__checkevent_breakpoint(struct perf_evlist *evlist)
702{
703 struct perf_evsel *evsel = list_entry(evlist->entries.next,
704 struct perf_evsel, node);
705
706 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
707 TEST_ASSERT_VAL("wrong type", PERF_TYPE_BREAKPOINT == evsel->attr.type);
708 TEST_ASSERT_VAL("wrong config", 0 == evsel->attr.config);
709 TEST_ASSERT_VAL("wrong bp_type", (HW_BREAKPOINT_R | HW_BREAKPOINT_W) ==
710 evsel->attr.bp_type);
711 TEST_ASSERT_VAL("wrong bp_len", HW_BREAKPOINT_LEN_4 ==
712 evsel->attr.bp_len);
713 return 0;
714}
715
716static int test__checkevent_breakpoint_x(struct perf_evlist *evlist)
717{
718 struct perf_evsel *evsel = list_entry(evlist->entries.next,
719 struct perf_evsel, node);
720
721 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
722 TEST_ASSERT_VAL("wrong type", PERF_TYPE_BREAKPOINT == evsel->attr.type);
723 TEST_ASSERT_VAL("wrong config", 0 == evsel->attr.config);
724 TEST_ASSERT_VAL("wrong bp_type",
725 HW_BREAKPOINT_X == evsel->attr.bp_type);
726 TEST_ASSERT_VAL("wrong bp_len", sizeof(long) == evsel->attr.bp_len);
727 return 0;
728}
729
730static int test__checkevent_breakpoint_r(struct perf_evlist *evlist)
731{
732 struct perf_evsel *evsel = list_entry(evlist->entries.next,
733 struct perf_evsel, node);
734
735 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
736 TEST_ASSERT_VAL("wrong type",
737 PERF_TYPE_BREAKPOINT == evsel->attr.type);
738 TEST_ASSERT_VAL("wrong config", 0 == evsel->attr.config);
739 TEST_ASSERT_VAL("wrong bp_type",
740 HW_BREAKPOINT_R == evsel->attr.bp_type);
741 TEST_ASSERT_VAL("wrong bp_len",
742 HW_BREAKPOINT_LEN_4 == evsel->attr.bp_len);
743 return 0;
744}
745
746static int test__checkevent_breakpoint_w(struct perf_evlist *evlist)
747{
748 struct perf_evsel *evsel = list_entry(evlist->entries.next,
749 struct perf_evsel, node);
750
751 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
752 TEST_ASSERT_VAL("wrong type",
753 PERF_TYPE_BREAKPOINT == evsel->attr.type);
754 TEST_ASSERT_VAL("wrong config", 0 == evsel->attr.config);
755 TEST_ASSERT_VAL("wrong bp_type",
756 HW_BREAKPOINT_W == evsel->attr.bp_type);
757 TEST_ASSERT_VAL("wrong bp_len",
758 HW_BREAKPOINT_LEN_4 == evsel->attr.bp_len);
759 return 0;
760}
761
Jiri Olsa65c1e042011-12-15 16:30:39 +0100762static int test__checkevent_tracepoint_modifier(struct perf_evlist *evlist)
763{
764 struct perf_evsel *evsel = list_entry(evlist->entries.next,
765 struct perf_evsel, node);
766
767 TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
768 TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
769 TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
770 TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
771
772 return test__checkevent_tracepoint(evlist);
773}
774
775static int
776test__checkevent_tracepoint_multi_modifier(struct perf_evlist *evlist)
777{
778 struct perf_evsel *evsel;
779
780 TEST_ASSERT_VAL("wrong number of entries", evlist->nr_entries > 1);
781
782 list_for_each_entry(evsel, &evlist->entries, node) {
783 TEST_ASSERT_VAL("wrong exclude_user",
784 !evsel->attr.exclude_user);
785 TEST_ASSERT_VAL("wrong exclude_kernel",
786 evsel->attr.exclude_kernel);
787 TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
788 TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
789 }
790
791 return test__checkevent_tracepoint_multi(evlist);
792}
793
794static int test__checkevent_raw_modifier(struct perf_evlist *evlist)
795{
796 struct perf_evsel *evsel = list_entry(evlist->entries.next,
797 struct perf_evsel, node);
798
799 TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
800 TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
801 TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
802 TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip);
803
804 return test__checkevent_raw(evlist);
805}
806
807static int test__checkevent_numeric_modifier(struct perf_evlist *evlist)
808{
809 struct perf_evsel *evsel = list_entry(evlist->entries.next,
810 struct perf_evsel, node);
811
812 TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
813 TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
814 TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
815 TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip);
816
817 return test__checkevent_numeric(evlist);
818}
819
820static int test__checkevent_symbolic_name_modifier(struct perf_evlist *evlist)
821{
822 struct perf_evsel *evsel = list_entry(evlist->entries.next,
823 struct perf_evsel, node);
824
825 TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
826 TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
827 TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
828 TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
829
830 return test__checkevent_symbolic_name(evlist);
831}
832
833static int test__checkevent_symbolic_alias_modifier(struct perf_evlist *evlist)
834{
835 struct perf_evsel *evsel = list_entry(evlist->entries.next,
836 struct perf_evsel, node);
837
838 TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
839 TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
840 TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
841 TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
842
843 return test__checkevent_symbolic_alias(evlist);
844}
845
846static int test__checkevent_genhw_modifier(struct perf_evlist *evlist)
847{
848 struct perf_evsel *evsel = list_entry(evlist->entries.next,
849 struct perf_evsel, node);
850
851 TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
852 TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
853 TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
854 TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip);
855
856 return test__checkevent_genhw(evlist);
857}
858
Jiri Olsa13b62562011-07-14 11:25:33 +0200859static struct test__event_st {
860 const char *name;
861 __u32 type;
862 int (*check)(struct perf_evlist *evlist);
863} test__events[] = {
864 {
865 .name = "syscalls:sys_enter_open",
866 .check = test__checkevent_tracepoint,
867 },
868 {
869 .name = "syscalls:*",
870 .check = test__checkevent_tracepoint_multi,
871 },
872 {
873 .name = "r1",
874 .check = test__checkevent_raw,
875 },
876 {
877 .name = "1:1",
878 .check = test__checkevent_numeric,
879 },
880 {
881 .name = "instructions",
882 .check = test__checkevent_symbolic_name,
883 },
884 {
885 .name = "faults",
886 .check = test__checkevent_symbolic_alias,
887 },
888 {
889 .name = "L1-dcache-load-miss",
890 .check = test__checkevent_genhw,
891 },
892 {
893 .name = "mem:0",
894 .check = test__checkevent_breakpoint,
895 },
896 {
897 .name = "mem:0:x",
898 .check = test__checkevent_breakpoint_x,
899 },
900 {
901 .name = "mem:0:r",
902 .check = test__checkevent_breakpoint_r,
903 },
904 {
905 .name = "mem:0:w",
906 .check = test__checkevent_breakpoint_w,
907 },
Jiri Olsa65c1e042011-12-15 16:30:39 +0100908 {
909 .name = "syscalls:sys_enter_open:k",
910 .check = test__checkevent_tracepoint_modifier,
911 },
912 {
913 .name = "syscalls:*:u",
914 .check = test__checkevent_tracepoint_multi_modifier,
915 },
916 {
917 .name = "r1:kp",
918 .check = test__checkevent_raw_modifier,
919 },
920 {
921 .name = "1:1:hp",
922 .check = test__checkevent_numeric_modifier,
923 },
924 {
925 .name = "instructions:h",
926 .check = test__checkevent_symbolic_name_modifier,
927 },
928 {
929 .name = "faults:u",
930 .check = test__checkevent_symbolic_alias_modifier,
931 },
932 {
933 .name = "L1-dcache-load-miss:kp",
934 .check = test__checkevent_genhw_modifier,
935 },
Jiri Olsa13b62562011-07-14 11:25:33 +0200936};
937
938#define TEST__EVENTS_CNT (sizeof(test__events) / sizeof(struct test__event_st))
939
940static int test__parse_events(void)
941{
942 struct perf_evlist *evlist;
943 u_int i;
944 int ret = 0;
945
946 for (i = 0; i < TEST__EVENTS_CNT; i++) {
947 struct test__event_st *e = &test__events[i];
948
949 evlist = perf_evlist__new(NULL, NULL);
950 if (evlist == NULL)
951 break;
952
953 ret = parse_events(evlist, e->name, 0);
954 if (ret) {
955 pr_debug("failed to parse event '%s', err %d\n",
956 e->name, ret);
957 break;
958 }
959
960 ret = e->check(evlist);
961 if (ret)
962 break;
963
964 perf_evlist__delete(evlist);
965 }
966
967 return ret;
968}
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -0200969
970static int sched__get_first_possible_cpu(pid_t pid, cpu_set_t **maskp,
971 size_t *sizep)
972{
973 cpu_set_t *mask;
974 size_t size;
975 int i, cpu = -1, nrcpus = 1024;
976realloc:
977 mask = CPU_ALLOC(nrcpus);
978 size = CPU_ALLOC_SIZE(nrcpus);
979 CPU_ZERO_S(size, mask);
980
981 if (sched_getaffinity(pid, size, mask) == -1) {
982 CPU_FREE(mask);
983 if (errno == EINVAL && nrcpus < (1024 << 8)) {
984 nrcpus = nrcpus << 2;
985 goto realloc;
986 }
987 perror("sched_getaffinity");
988 return -1;
989 }
990
991 for (i = 0; i < nrcpus; i++) {
992 if (CPU_ISSET_S(i, size, mask)) {
993 if (cpu == -1) {
994 cpu = i;
995 *maskp = mask;
996 *sizep = size;
997 } else
998 CPU_CLR_S(i, size, mask);
999 }
1000 }
1001
1002 if (cpu == -1)
1003 CPU_FREE(mask);
1004
1005 return cpu;
1006}
1007
1008static int test__PERF_RECORD(void)
1009{
1010 struct perf_record_opts opts = {
1011 .target_pid = -1,
1012 .target_tid = -1,
1013 .no_delay = true,
1014 .freq = 10,
1015 .mmap_pages = 256,
1016 .sample_id_all_avail = true,
1017 };
1018 cpu_set_t *cpu_mask = NULL;
1019 size_t cpu_mask_size = 0;
1020 struct perf_evlist *evlist = perf_evlist__new(NULL, NULL);
1021 struct perf_evsel *evsel;
1022 struct perf_sample sample;
1023 const char *cmd = "sleep";
1024 const char *argv[] = { cmd, "1", NULL, };
1025 char *bname;
1026 u64 sample_type, prev_time = 0;
1027 bool found_cmd_mmap = false,
1028 found_libc_mmap = false,
1029 found_vdso_mmap = false,
1030 found_ld_mmap = false;
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001031 int err = -1, errs = 0, i, wakeups = 0, sample_size;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001032 u32 cpu;
1033 int total_events = 0, nr_events[PERF_RECORD_MAX] = { 0, };
1034
1035 if (evlist == NULL || argv == NULL) {
1036 pr_debug("Not enough memory to create evlist\n");
1037 goto out;
1038 }
1039
1040 /*
1041 * We need at least one evsel in the evlist, use the default
1042 * one: "cycles".
1043 */
1044 err = perf_evlist__add_default(evlist);
1045 if (err < 0) {
1046 pr_debug("Not enough memory to create evsel\n");
1047 goto out_delete_evlist;
1048 }
1049
1050 /*
1051 * Create maps of threads and cpus to monitor. In this case
1052 * we start with all threads and cpus (-1, -1) but then in
1053 * perf_evlist__prepare_workload we'll fill in the only thread
1054 * we're monitoring, the one forked there.
1055 */
1056 err = perf_evlist__create_maps(evlist, opts.target_pid,
1057 opts.target_tid, opts.cpu_list);
1058 if (err < 0) {
1059 pr_debug("Not enough memory to create thread/cpu maps\n");
1060 goto out_delete_evlist;
1061 }
1062
1063 /*
1064 * Prepare the workload in argv[] to run, it'll fork it, and then wait
1065 * for perf_evlist__start_workload() to exec it. This is done this way
1066 * so that we have time to open the evlist (calling sys_perf_event_open
1067 * on all the fds) and then mmap them.
1068 */
1069 err = perf_evlist__prepare_workload(evlist, &opts, argv);
1070 if (err < 0) {
1071 pr_debug("Couldn't run the workload!\n");
1072 goto out_delete_evlist;
1073 }
1074
1075 /*
1076 * Config the evsels, setting attr->comm on the first one, etc.
1077 */
1078 evsel = list_entry(evlist->entries.next, struct perf_evsel, node);
1079 evsel->attr.sample_type |= PERF_SAMPLE_CPU;
1080 evsel->attr.sample_type |= PERF_SAMPLE_TID;
1081 evsel->attr.sample_type |= PERF_SAMPLE_TIME;
1082 perf_evlist__config_attrs(evlist, &opts);
1083
1084 err = sched__get_first_possible_cpu(evlist->workload.pid, &cpu_mask,
1085 &cpu_mask_size);
1086 if (err < 0) {
1087 pr_debug("sched__get_first_possible_cpu: %s\n", strerror(errno));
1088 goto out_delete_evlist;
1089 }
1090
1091 cpu = err;
1092
1093 /*
1094 * So that we can check perf_sample.cpu on all the samples.
1095 */
1096 if (sched_setaffinity(evlist->workload.pid, cpu_mask_size, cpu_mask) < 0) {
1097 pr_debug("sched_setaffinity: %s\n", strerror(errno));
1098 goto out_free_cpu_mask;
1099 }
1100
1101 /*
1102 * Call sys_perf_event_open on all the fds on all the evsels,
1103 * grouping them if asked to.
1104 */
1105 err = perf_evlist__open(evlist, opts.group);
1106 if (err < 0) {
1107 pr_debug("perf_evlist__open: %s\n", strerror(errno));
1108 goto out_delete_evlist;
1109 }
1110
1111 /*
1112 * mmap the first fd on a given CPU and ask for events for the other
1113 * fds in the same CPU to be injected in the same mmap ring buffer
1114 * (using ioctl(PERF_EVENT_IOC_SET_OUTPUT)).
1115 */
1116 err = perf_evlist__mmap(evlist, opts.mmap_pages, false);
1117 if (err < 0) {
1118 pr_debug("perf_evlist__mmap: %s\n", strerror(errno));
1119 goto out_delete_evlist;
1120 }
1121
1122 /*
1123 * We'll need these two to parse the PERF_SAMPLE_* fields in each
1124 * event.
1125 */
1126 sample_type = perf_evlist__sample_type(evlist);
1127 sample_size = __perf_evsel__sample_size(sample_type);
1128
1129 /*
1130 * Now that all is properly set up, enable the events, they will
1131 * count just on workload.pid, which will start...
1132 */
1133 perf_evlist__enable(evlist);
1134
1135 /*
1136 * Now!
1137 */
1138 perf_evlist__start_workload(evlist);
1139
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001140 while (1) {
1141 int before = total_events;
1142
1143 for (i = 0; i < evlist->nr_mmaps; i++) {
1144 union perf_event *event;
1145
1146 while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
1147 const u32 type = event->header.type;
1148 const char *name = perf_event__name(type);
1149
1150 ++total_events;
1151 if (type < PERF_RECORD_MAX)
1152 nr_events[type]++;
1153
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001154 err = perf_event__parse_sample(event, sample_type,
1155 sample_size, true,
1156 &sample, false);
1157 if (err < 0) {
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001158 if (verbose)
1159 perf_event__fprintf(event, stderr);
1160 pr_debug("Couldn't parse sample\n");
1161 goto out_err;
1162 }
1163
1164 if (verbose) {
1165 pr_info("%" PRIu64" %d ", sample.time, sample.cpu);
1166 perf_event__fprintf(event, stderr);
1167 }
1168
1169 if (prev_time > sample.time) {
1170 pr_debug("%s going backwards in time, prev=%" PRIu64 ", curr=%" PRIu64 "\n",
1171 name, prev_time, sample.time);
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001172 ++errs;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001173 }
1174
1175 prev_time = sample.time;
1176
1177 if (sample.cpu != cpu) {
1178 pr_debug("%s with unexpected cpu, expected %d, got %d\n",
1179 name, cpu, sample.cpu);
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001180 ++errs;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001181 }
1182
1183 if ((pid_t)sample.pid != evlist->workload.pid) {
1184 pr_debug("%s with unexpected pid, expected %d, got %d\n",
1185 name, evlist->workload.pid, sample.pid);
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001186 ++errs;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001187 }
1188
1189 if ((pid_t)sample.tid != evlist->workload.pid) {
1190 pr_debug("%s with unexpected tid, expected %d, got %d\n",
1191 name, evlist->workload.pid, sample.tid);
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001192 ++errs;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001193 }
1194
1195 if ((type == PERF_RECORD_COMM ||
1196 type == PERF_RECORD_MMAP ||
1197 type == PERF_RECORD_FORK ||
1198 type == PERF_RECORD_EXIT) &&
1199 (pid_t)event->comm.pid != evlist->workload.pid) {
1200 pr_debug("%s with unexpected pid/tid\n", name);
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001201 ++errs;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001202 }
1203
1204 if ((type == PERF_RECORD_COMM ||
1205 type == PERF_RECORD_MMAP) &&
1206 event->comm.pid != event->comm.tid) {
1207 pr_debug("%s with different pid/tid!\n", name);
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001208 ++errs;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001209 }
1210
1211 switch (type) {
1212 case PERF_RECORD_COMM:
1213 if (strcmp(event->comm.comm, cmd)) {
1214 pr_debug("%s with unexpected comm!\n", name);
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001215 ++errs;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001216 }
1217 break;
1218 case PERF_RECORD_EXIT:
1219 goto found_exit;
1220 case PERF_RECORD_MMAP:
1221 bname = strrchr(event->mmap.filename, '/');
1222 if (bname != NULL) {
1223 if (!found_cmd_mmap)
1224 found_cmd_mmap = !strcmp(bname + 1, cmd);
1225 if (!found_libc_mmap)
1226 found_libc_mmap = !strncmp(bname + 1, "libc", 4);
1227 if (!found_ld_mmap)
1228 found_ld_mmap = !strncmp(bname + 1, "ld", 2);
1229 } else if (!found_vdso_mmap)
1230 found_vdso_mmap = !strcmp(event->mmap.filename, "[vdso]");
1231 break;
1232
1233 case PERF_RECORD_SAMPLE:
1234 /* Just ignore samples for now */
1235 break;
1236 default:
1237 pr_debug("Unexpected perf_event->header.type %d!\n",
1238 type);
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001239 ++errs;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001240 }
1241 }
1242 }
1243
1244 /*
1245 * We don't use poll here because at least at 3.1 times the
1246 * PERF_RECORD_{!SAMPLE} events don't honour
1247 * perf_event_attr.wakeup_events, just PERF_EVENT_SAMPLE does.
1248 */
1249 if (total_events == before && false)
1250 poll(evlist->pollfd, evlist->nr_fds, -1);
1251
1252 sleep(1);
1253 if (++wakeups > 5) {
1254 pr_debug("No PERF_RECORD_EXIT event!\n");
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001255 break;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001256 }
1257 }
1258
1259found_exit:
1260 if (nr_events[PERF_RECORD_COMM] > 1) {
1261 pr_debug("Excessive number of PERF_RECORD_COMM events!\n");
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001262 ++errs;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001263 }
1264
1265 if (nr_events[PERF_RECORD_COMM] == 0) {
1266 pr_debug("Missing PERF_RECORD_COMM for %s!\n", cmd);
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001267 ++errs;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001268 }
1269
1270 if (!found_cmd_mmap) {
1271 pr_debug("PERF_RECORD_MMAP for %s missing!\n", cmd);
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001272 ++errs;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001273 }
1274
1275 if (!found_libc_mmap) {
1276 pr_debug("PERF_RECORD_MMAP for %s missing!\n", "libc");
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001277 ++errs;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001278 }
1279
1280 if (!found_ld_mmap) {
1281 pr_debug("PERF_RECORD_MMAP for %s missing!\n", "ld");
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001282 ++errs;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001283 }
1284
1285 if (!found_vdso_mmap) {
1286 pr_debug("PERF_RECORD_MMAP for %s missing!\n", "[vdso]");
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001287 ++errs;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001288 }
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001289out_err:
1290 perf_evlist__munmap(evlist);
1291out_free_cpu_mask:
1292 CPU_FREE(cpu_mask);
1293out_delete_evlist:
1294 perf_evlist__delete(evlist);
1295out:
Arnaldo Carvalho de Melof71c49e2011-12-02 13:53:04 -02001296 return (err < 0 || errs > 0) ? -1 : 0;
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001297}
1298
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -03001299static struct test {
1300 const char *desc;
1301 int (*func)(void);
1302} tests[] = {
1303 {
1304 .desc = "vmlinux symtab matches kallsyms",
1305 .func = test__vmlinux_matches_kallsyms,
1306 },
1307 {
Arnaldo Carvalho de Melod8548612011-01-04 00:16:20 -02001308 .desc = "detect open syscall event",
1309 .func = test__open_syscall_event,
1310 },
1311 {
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -02001312 .desc = "detect open syscall event on all cpus",
1313 .func = test__open_syscall_event_on_all_cpus,
1314 },
1315 {
Arnaldo Carvalho de Melode5fa3a2011-01-15 10:42:46 -02001316 .desc = "read samples using the mmap interface",
1317 .func = test__basic_mmap,
1318 },
1319 {
Jiri Olsa13b62562011-07-14 11:25:33 +02001320 .desc = "parse events tests",
1321 .func = test__parse_events,
1322 },
1323 {
Arnaldo Carvalho de Melo3e7c4392011-12-02 11:13:50 -02001324 .desc = "Validate PERF_RECORD_* events & perf_sample fields",
1325 .func = test__PERF_RECORD,
1326 },
1327 {
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -03001328 .func = NULL,
1329 },
1330};
1331
Arnaldo Carvalho de Meloe60770a2011-11-29 12:52:07 -02001332static bool perf_test__matches(int curr, int argc, const char *argv[])
1333{
1334 int i;
1335
1336 if (argc == 0)
1337 return true;
1338
1339 for (i = 0; i < argc; ++i) {
1340 char *end;
1341 long nr = strtoul(argv[i], &end, 10);
1342
1343 if (*end == '\0') {
1344 if (nr == curr + 1)
1345 return true;
1346 continue;
1347 }
1348
1349 if (strstr(tests[curr].desc, argv[i]))
1350 return true;
1351 }
1352
1353 return false;
1354}
1355
1356static int __cmd_test(int argc, const char *argv[])
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -03001357{
1358 int i = 0;
1359
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -03001360 while (tests[i].func) {
Arnaldo Carvalho de Meloe60770a2011-11-29 12:52:07 -02001361 int curr = i++, err;
1362
1363 if (!perf_test__matches(curr, argc, argv))
1364 continue;
1365
1366 pr_info("%2d: %s:", i, tests[curr].desc);
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -03001367 pr_debug("\n--- start ---\n");
Arnaldo Carvalho de Meloe60770a2011-11-29 12:52:07 -02001368 err = tests[curr].func();
1369 pr_debug("---- end ----\n%s:", tests[curr].desc);
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -03001370 pr_info(" %s\n", err ? "FAILED!\n" : "Ok");
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -03001371 }
1372
1373 return 0;
1374}
1375
Arnaldo Carvalho de Meloe60770a2011-11-29 12:52:07 -02001376static int perf_test__list(int argc, const char **argv)
1377{
1378 int i = 0;
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -03001379
Arnaldo Carvalho de Meloe60770a2011-11-29 12:52:07 -02001380 while (tests[i].func) {
1381 int curr = i++;
1382
1383 if (argc > 1 && !strstr(tests[curr].desc, argv[1]))
1384 continue;
1385
1386 pr_info("%2d: %s\n", i, tests[curr].desc);
1387 }
1388
1389 return 0;
1390}
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -03001391
1392int cmd_test(int argc, const char **argv, const char *prefix __used)
1393{
Arnaldo Carvalho de Meloe60770a2011-11-29 12:52:07 -02001394 const char * const test_usage[] = {
1395 "perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]",
1396 NULL,
1397 };
1398 const struct option test_options[] = {
Namhyung Kimc30ab8a2012-01-08 02:25:26 +09001399 OPT_INCR('v', "verbose", &verbose,
Arnaldo Carvalho de Meloe60770a2011-11-29 12:52:07 -02001400 "be more verbose (show symbol address, etc)"),
1401 OPT_END()
1402 };
1403
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -03001404 argc = parse_options(argc, argv, test_options, test_usage, 0);
Arnaldo Carvalho de Meloe60770a2011-11-29 12:52:07 -02001405 if (argc >= 1 && !strcmp(argv[0], "list"))
1406 return perf_test__list(argc, argv);
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -03001407
1408 symbol_conf.priv_size = sizeof(int);
1409 symbol_conf.sort_by_name = true;
1410 symbol_conf.try_vmlinux_path = true;
1411
1412 if (symbol__init() < 0)
1413 return -1;
1414
1415 setup_pager();
1416
Arnaldo Carvalho de Meloe60770a2011-11-29 12:52:07 -02001417 return __cmd_test(argc, argv);
Arnaldo Carvalho de Melo1c6a8002010-04-29 18:58:32 -03001418}