4 * Builtin regression testing command: ever growing number of sanity tests
8 #include "util/cache.h"
9 #include "util/debug.h"
10 #include "util/debugfs.h"
11 #include "util/evlist.h"
12 #include "util/parse-options.h"
13 #include "util/parse-events.h"
14 #include "util/symbol.h"
15 #include "util/thread_map.h"
17 #include "../../include/linux/hw_breakpoint.h"
21 static int vmlinux_matches_kallsyms_filter(struct map
*map __used
, struct symbol
*sym
)
23 bool *visited
= symbol__priv(sym
);
28 static int test__vmlinux_matches_kallsyms(void)
33 struct map
*kallsyms_map
, *vmlinux_map
;
34 struct machine kallsyms
, vmlinux
;
35 enum map_type type
= MAP__FUNCTION
;
36 long page_size
= sysconf(_SC_PAGE_SIZE
);
37 struct ref_reloc_sym ref_reloc_sym
= { .name
= "_stext", };
42 * Init the machines that will hold kernel, modules obtained from
43 * both vmlinux + .ko files and from /proc/kallsyms split by modules.
45 machine__init(&kallsyms
, "", HOST_KERNEL_ID
);
46 machine__init(&vmlinux
, "", HOST_KERNEL_ID
);
51 * Create the kernel maps for kallsyms and the DSO where we will then
52 * load /proc/kallsyms. Also create the modules maps from /proc/modules
53 * and find the .ko files that match them in /lib/modules/`uname -r`/.
55 if (machine__create_kernel_maps(&kallsyms
) < 0) {
56 pr_debug("machine__create_kernel_maps ");
63 * Load and split /proc/kallsyms into multiple maps, one per module.
65 if (machine__load_kallsyms(&kallsyms
, "/proc/kallsyms", type
, NULL
) <= 0) {
66 pr_debug("dso__load_kallsyms ");
73 * kallsyms will be internally on demand sorted by name so that we can
74 * find the reference relocation * symbol, i.e. the symbol we will use
75 * to see if the running kernel was relocated by checking if it has the
76 * same value in the vmlinux file we load.
78 kallsyms_map
= machine__kernel_map(&kallsyms
, type
);
80 sym
= map__find_symbol_by_name(kallsyms_map
, ref_reloc_sym
.name
, NULL
);
82 pr_debug("dso__find_symbol_by_name ");
86 ref_reloc_sym
.addr
= sym
->start
;
91 * Now repeat step 2, this time for the vmlinux file we'll auto-locate.
93 if (machine__create_kernel_maps(&vmlinux
) < 0) {
94 pr_debug("machine__create_kernel_maps ");
98 vmlinux_map
= machine__kernel_map(&vmlinux
, type
);
99 map__kmap(vmlinux_map
)->ref_reloc_sym
= &ref_reloc_sym
;
104 * Locate a vmlinux file in the vmlinux path that has a buildid that
105 * matches the one of the running kernel.
107 * While doing that look if we find the ref reloc symbol, if we find it
108 * we'll have its ref_reloc_symbol.unrelocated_addr and then
109 * maps__reloc_vmlinux will notice and set proper ->[un]map_ip routines
110 * to fixup the symbols.
112 if (machine__load_vmlinux_path(&vmlinux
, type
,
113 vmlinux_matches_kallsyms_filter
) <= 0) {
114 pr_debug("machine__load_vmlinux_path ");
122 * Now look at the symbols in the vmlinux DSO and check if we find all of them
123 * in the kallsyms dso. For the ones that are in both, check its names and
126 for (nd
= rb_first(&vmlinux_map
->dso
->symbols
[type
]); nd
; nd
= rb_next(nd
)) {
127 struct symbol
*pair
, *first_pair
;
128 bool backwards
= true;
130 sym
= rb_entry(nd
, struct symbol
, rb_node
);
132 if (sym
->start
== sym
->end
)
135 first_pair
= machine__find_kernel_symbol(&kallsyms
, type
, sym
->start
, NULL
, NULL
);
138 if (pair
&& pair
->start
== sym
->start
) {
140 if (strcmp(sym
->name
, pair
->name
) == 0) {
142 * kallsyms don't have the symbol end, so we
143 * set that by using the next symbol start - 1,
144 * in some cases we get this up to a page
145 * wrong, trace_kmalloc when I was developing
146 * this code was one such example, 2106 bytes
147 * off the real size. More than that and we
148 * _really_ have a problem.
150 s64 skew
= sym
->end
- pair
->end
;
151 if (llabs(skew
) < page_size
)
154 pr_debug("%#" PRIx64
": diff end addr for %s v: %#" PRIx64
" k: %#" PRIx64
"\n",
155 sym
->start
, sym
->name
, sym
->end
, pair
->end
);
159 nnd
= backwards
? rb_prev(&pair
->rb_node
) :
160 rb_next(&pair
->rb_node
);
162 struct symbol
*next
= rb_entry(nnd
, struct symbol
, rb_node
);
164 if (next
->start
== sym
->start
) {
176 pr_debug("%#" PRIx64
": diff name v: %s k: %s\n",
177 sym
->start
, sym
->name
, pair
->name
);
180 pr_debug("%#" PRIx64
": %s not on kallsyms\n", sym
->start
, sym
->name
);
188 pr_info("Maps only in vmlinux:\n");
190 for (nd
= rb_first(&vmlinux
.kmaps
.maps
[type
]); nd
; nd
= rb_next(nd
)) {
191 struct map
*pos
= rb_entry(nd
, struct map
, rb_node
), *pair
;
193 * If it is the kernel, kallsyms is always "[kernel.kallsyms]", while
194 * the kernel will have the path for the vmlinux file being used,
195 * so use the short name, less descriptive but the same ("[kernel]" in
198 pair
= map_groups__find_by_name(&kallsyms
.kmaps
, type
,
200 pos
->dso
->short_name
:
205 map__fprintf(pos
, stderr
);
208 pr_info("Maps in vmlinux with a different name in kallsyms:\n");
210 for (nd
= rb_first(&vmlinux
.kmaps
.maps
[type
]); nd
; nd
= rb_next(nd
)) {
211 struct map
*pos
= rb_entry(nd
, struct map
, rb_node
), *pair
;
213 pair
= map_groups__find(&kallsyms
.kmaps
, type
, pos
->start
);
214 if (pair
== NULL
|| pair
->priv
)
217 if (pair
->start
== pos
->start
) {
219 pr_info(" %" PRIx64
"-%" PRIx64
" %" PRIx64
" %s in kallsyms as",
220 pos
->start
, pos
->end
, pos
->pgoff
, pos
->dso
->name
);
221 if (pos
->pgoff
!= pair
->pgoff
|| pos
->end
!= pair
->end
)
222 pr_info(": \n*%" PRIx64
"-%" PRIx64
" %" PRIx64
"",
223 pair
->start
, pair
->end
, pair
->pgoff
);
224 pr_info(" %s\n", pair
->dso
->name
);
229 pr_info("Maps only in kallsyms:\n");
231 for (nd
= rb_first(&kallsyms
.kmaps
.maps
[type
]);
232 nd
; nd
= rb_next(nd
)) {
233 struct map
*pos
= rb_entry(nd
, struct map
, rb_node
);
236 map__fprintf(pos
, stderr
);
242 #include "util/cpumap.h"
243 #include "util/evsel.h"
244 #include <sys/types.h>
246 static int trace_event__id(const char *evname
)
251 if (asprintf(&filename
,
253 tracing_events_path
, evname
) < 0)
256 fd
= open(filename
, O_RDONLY
);
259 if (read(fd
, id
, sizeof(id
)) > 0)
268 static int test__open_syscall_event(void)
271 struct thread_map
*threads
;
272 struct perf_evsel
*evsel
;
273 struct perf_event_attr attr
;
274 unsigned int nr_open_calls
= 111, i
;
275 int id
= trace_event__id("sys_enter_open");
278 pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
282 threads
= thread_map__new(-1, getpid(), UINT_MAX
);
283 if (threads
== NULL
) {
284 pr_debug("thread_map__new\n");
288 memset(&attr
, 0, sizeof(attr
));
289 attr
.type
= PERF_TYPE_TRACEPOINT
;
291 evsel
= perf_evsel__new(&attr
, 0);
293 pr_debug("perf_evsel__new\n");
294 goto out_thread_map_delete
;
297 if (perf_evsel__open_per_thread(evsel
, threads
, false, NULL
) < 0) {
298 pr_debug("failed to open counter: %s, "
299 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
301 goto out_evsel_delete
;
304 for (i
= 0; i
< nr_open_calls
; ++i
) {
305 fd
= open("/etc/passwd", O_RDONLY
);
309 if (perf_evsel__read_on_cpu(evsel
, 0, 0) < 0) {
310 pr_debug("perf_evsel__read_on_cpu\n");
314 if (evsel
->counts
->cpu
[0].val
!= nr_open_calls
) {
315 pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64
"\n",
316 nr_open_calls
, evsel
->counts
->cpu
[0].val
);
322 perf_evsel__close_fd(evsel
, 1, threads
->nr
);
324 perf_evsel__delete(evsel
);
325 out_thread_map_delete
:
326 thread_map__delete(threads
);
332 static int test__open_syscall_event_on_all_cpus(void)
334 int err
= -1, fd
, cpu
;
335 struct thread_map
*threads
;
336 struct cpu_map
*cpus
;
337 struct perf_evsel
*evsel
;
338 struct perf_event_attr attr
;
339 unsigned int nr_open_calls
= 111, i
;
341 int id
= trace_event__id("sys_enter_open");
344 pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
348 threads
= thread_map__new(-1, getpid(), UINT_MAX
);
349 if (threads
== NULL
) {
350 pr_debug("thread_map__new\n");
354 cpus
= cpu_map__new(NULL
);
356 pr_debug("cpu_map__new\n");
357 goto out_thread_map_delete
;
363 memset(&attr
, 0, sizeof(attr
));
364 attr
.type
= PERF_TYPE_TRACEPOINT
;
366 evsel
= perf_evsel__new(&attr
, 0);
368 pr_debug("perf_evsel__new\n");
369 goto out_thread_map_delete
;
372 if (perf_evsel__open(evsel
, cpus
, threads
, false, NULL
) < 0) {
373 pr_debug("failed to open counter: %s, "
374 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
376 goto out_evsel_delete
;
379 for (cpu
= 0; cpu
< cpus
->nr
; ++cpu
) {
380 unsigned int ncalls
= nr_open_calls
+ cpu
;
382 * XXX eventually lift this restriction in a way that
383 * keeps perf building on older glibc installations
384 * without CPU_ALLOC. 1024 cpus in 2010 still seems
385 * a reasonable upper limit tho :-)
387 if (cpus
->map
[cpu
] >= CPU_SETSIZE
) {
388 pr_debug("Ignoring CPU %d\n", cpus
->map
[cpu
]);
392 CPU_SET(cpus
->map
[cpu
], &cpu_set
);
393 if (sched_setaffinity(0, sizeof(cpu_set
), &cpu_set
) < 0) {
394 pr_debug("sched_setaffinity() failed on CPU %d: %s ",
399 for (i
= 0; i
< ncalls
; ++i
) {
400 fd
= open("/etc/passwd", O_RDONLY
);
403 CPU_CLR(cpus
->map
[cpu
], &cpu_set
);
407 * Here we need to explicitely preallocate the counts, as if
408 * we use the auto allocation it will allocate just for 1 cpu,
409 * as we start by cpu 0.
411 if (perf_evsel__alloc_counts(evsel
, cpus
->nr
) < 0) {
412 pr_debug("perf_evsel__alloc_counts(ncpus=%d)\n", cpus
->nr
);
418 for (cpu
= 0; cpu
< cpus
->nr
; ++cpu
) {
419 unsigned int expected
;
421 if (cpus
->map
[cpu
] >= CPU_SETSIZE
)
424 if (perf_evsel__read_on_cpu(evsel
, cpu
, 0) < 0) {
425 pr_debug("perf_evsel__read_on_cpu\n");
430 expected
= nr_open_calls
+ cpu
;
431 if (evsel
->counts
->cpu
[cpu
].val
!= expected
) {
432 pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls on cpu %d, got %" PRIu64
"\n",
433 expected
, cpus
->map
[cpu
], evsel
->counts
->cpu
[cpu
].val
);
439 perf_evsel__close_fd(evsel
, 1, threads
->nr
);
441 perf_evsel__delete(evsel
);
442 out_thread_map_delete
:
443 thread_map__delete(threads
);
448 * This test will generate random numbers of calls to some getpid syscalls,
449 * then establish an mmap for a group of events that are created to monitor
452 * It will receive the events, using mmap, use its PERF_SAMPLE_ID generated
453 * sample.id field to map back to its respective perf_evsel instance.
455 * Then it checks if the number of syscalls reported as perf events by
456 * the kernel corresponds to the number of syscalls made.
458 static int test__basic_mmap(void)
461 union perf_event
*event
;
462 struct thread_map
*threads
;
463 struct cpu_map
*cpus
;
464 struct perf_evlist
*evlist
;
465 struct perf_event_attr attr
= {
466 .type
= PERF_TYPE_TRACEPOINT
,
467 .read_format
= PERF_FORMAT_ID
,
468 .sample_type
= PERF_SAMPLE_ID
,
472 const char *syscall_names
[] = { "getsid", "getppid", "getpgrp",
474 pid_t (*syscalls
[])(void) = { (void *)getsid
, getppid
, getpgrp
,
476 #define nsyscalls ARRAY_SIZE(syscall_names)
478 unsigned int nr_events
[nsyscalls
],
479 expected_nr_events
[nsyscalls
], i
, j
;
480 struct perf_evsel
*evsels
[nsyscalls
], *evsel
;
481 int sample_size
= __perf_evsel__sample_size(attr
.sample_type
);
483 for (i
= 0; i
< nsyscalls
; ++i
) {
486 snprintf(name
, sizeof(name
), "sys_enter_%s", syscall_names
[i
]);
487 ids
[i
] = trace_event__id(name
);
489 pr_debug("Is debugfs mounted on /sys/kernel/debug?\n");
493 expected_nr_events
[i
] = random() % 257;
496 threads
= thread_map__new(-1, getpid(), UINT_MAX
);
497 if (threads
== NULL
) {
498 pr_debug("thread_map__new\n");
502 cpus
= cpu_map__new(NULL
);
504 pr_debug("cpu_map__new\n");
505 goto out_free_threads
;
509 CPU_SET(cpus
->map
[0], &cpu_set
);
510 sched_setaffinity(0, sizeof(cpu_set
), &cpu_set
);
511 if (sched_setaffinity(0, sizeof(cpu_set
), &cpu_set
) < 0) {
512 pr_debug("sched_setaffinity() failed on CPU %d: %s ",
513 cpus
->map
[0], strerror(errno
));
517 evlist
= perf_evlist__new(cpus
, threads
);
518 if (evlist
== NULL
) {
519 pr_debug("perf_evlist__new\n");
523 /* anonymous union fields, can't be initialized above */
524 attr
.wakeup_events
= 1;
525 attr
.sample_period
= 1;
527 for (i
= 0; i
< nsyscalls
; ++i
) {
528 attr
.config
= ids
[i
];
529 evsels
[i
] = perf_evsel__new(&attr
, i
);
530 if (evsels
[i
] == NULL
) {
531 pr_debug("perf_evsel__new\n");
532 goto out_free_evlist
;
535 perf_evlist__add(evlist
, evsels
[i
]);
537 if (perf_evsel__open(evsels
[i
], cpus
, threads
, false, NULL
) < 0) {
538 pr_debug("failed to open counter: %s, "
539 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
545 if (perf_evlist__mmap(evlist
, 128, true) < 0) {
546 pr_debug("failed to mmap events: %d (%s)\n", errno
,
551 for (i
= 0; i
< nsyscalls
; ++i
)
552 for (j
= 0; j
< expected_nr_events
[i
]; ++j
) {
553 int foo
= syscalls
[i
]();
557 while ((event
= perf_evlist__mmap_read(evlist
, 0)) != NULL
) {
558 struct perf_sample sample
;
560 if (event
->header
.type
!= PERF_RECORD_SAMPLE
) {
561 pr_debug("unexpected %s event\n",
562 perf_event__name(event
->header
.type
));
566 err
= perf_event__parse_sample(event
, attr
.sample_type
, sample_size
,
567 false, &sample
, false);
569 pr_err("Can't parse sample, err = %d\n", err
);
573 evsel
= perf_evlist__id2evsel(evlist
, sample
.id
);
575 pr_debug("event with id %" PRIu64
576 " doesn't map to an evsel\n", sample
.id
);
579 nr_events
[evsel
->idx
]++;
582 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
583 if (nr_events
[evsel
->idx
] != expected_nr_events
[evsel
->idx
]) {
584 pr_debug("expected %d %s events, got %d\n",
585 expected_nr_events
[evsel
->idx
],
586 event_name(evsel
), nr_events
[evsel
->idx
]);
593 perf_evlist__munmap(evlist
);
595 for (i
= 0; i
< nsyscalls
; ++i
)
596 perf_evsel__close_fd(evsels
[i
], 1, threads
->nr
);
598 perf_evlist__delete(evlist
);
600 cpu_map__delete(cpus
);
602 thread_map__delete(threads
);
607 #define TEST_ASSERT_VAL(text, cond) \
610 pr_debug("FAILED %s:%d %s\n", __FILE__, __LINE__, text); \
615 static int test__checkevent_tracepoint(struct perf_evlist
*evlist
)
617 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
618 struct perf_evsel
, node
);
620 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist
->nr_entries
);
621 TEST_ASSERT_VAL("wrong type", PERF_TYPE_TRACEPOINT
== evsel
->attr
.type
);
622 TEST_ASSERT_VAL("wrong sample_type",
623 (PERF_SAMPLE_RAW
| PERF_SAMPLE_TIME
| PERF_SAMPLE_CPU
) ==
624 evsel
->attr
.sample_type
);
625 TEST_ASSERT_VAL("wrong sample_period", 1 == evsel
->attr
.sample_period
);
629 static int test__checkevent_tracepoint_multi(struct perf_evlist
*evlist
)
631 struct perf_evsel
*evsel
;
633 TEST_ASSERT_VAL("wrong number of entries", evlist
->nr_entries
> 1);
635 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
636 TEST_ASSERT_VAL("wrong type",
637 PERF_TYPE_TRACEPOINT
== evsel
->attr
.type
);
638 TEST_ASSERT_VAL("wrong sample_type",
639 (PERF_SAMPLE_RAW
| PERF_SAMPLE_TIME
| PERF_SAMPLE_CPU
)
640 == evsel
->attr
.sample_type
);
641 TEST_ASSERT_VAL("wrong sample_period",
642 1 == evsel
->attr
.sample_period
);
647 static int test__checkevent_raw(struct perf_evlist
*evlist
)
649 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
650 struct perf_evsel
, node
);
652 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist
->nr_entries
);
653 TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW
== evsel
->attr
.type
);
654 TEST_ASSERT_VAL("wrong config", 0x1a == evsel
->attr
.config
);
658 static int test__checkevent_numeric(struct perf_evlist
*evlist
)
660 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
661 struct perf_evsel
, node
);
663 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist
->nr_entries
);
664 TEST_ASSERT_VAL("wrong type", 1 == evsel
->attr
.type
);
665 TEST_ASSERT_VAL("wrong config", 1 == evsel
->attr
.config
);
669 static int test__checkevent_symbolic_name(struct perf_evlist
*evlist
)
671 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
672 struct perf_evsel
, node
);
674 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist
->nr_entries
);
675 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE
== evsel
->attr
.type
);
676 TEST_ASSERT_VAL("wrong config",
677 PERF_COUNT_HW_INSTRUCTIONS
== evsel
->attr
.config
);
681 static int test__checkevent_symbolic_name_config(struct perf_evlist
*evlist
)
683 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
684 struct perf_evsel
, node
);
686 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist
->nr_entries
);
687 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE
== evsel
->attr
.type
);
688 TEST_ASSERT_VAL("wrong config",
689 PERF_COUNT_HW_CPU_CYCLES
== evsel
->attr
.config
);
690 TEST_ASSERT_VAL("wrong period",
691 100000 == evsel
->attr
.sample_period
);
692 TEST_ASSERT_VAL("wrong config1",
693 0 == evsel
->attr
.config1
);
694 TEST_ASSERT_VAL("wrong config2",
695 1 == evsel
->attr
.config2
);
699 static int test__checkevent_symbolic_alias(struct perf_evlist
*evlist
)
701 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
702 struct perf_evsel
, node
);
704 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist
->nr_entries
);
705 TEST_ASSERT_VAL("wrong type", PERF_TYPE_SOFTWARE
== evsel
->attr
.type
);
706 TEST_ASSERT_VAL("wrong config",
707 PERF_COUNT_SW_PAGE_FAULTS
== evsel
->attr
.config
);
711 static int test__checkevent_genhw(struct perf_evlist
*evlist
)
713 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
714 struct perf_evsel
, node
);
716 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist
->nr_entries
);
717 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HW_CACHE
== evsel
->attr
.type
);
718 TEST_ASSERT_VAL("wrong config", (1 << 16) == evsel
->attr
.config
);
722 static int test__checkevent_breakpoint(struct perf_evlist
*evlist
)
724 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
725 struct perf_evsel
, node
);
727 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist
->nr_entries
);
728 TEST_ASSERT_VAL("wrong type", PERF_TYPE_BREAKPOINT
== evsel
->attr
.type
);
729 TEST_ASSERT_VAL("wrong config", 0 == evsel
->attr
.config
);
730 TEST_ASSERT_VAL("wrong bp_type", (HW_BREAKPOINT_R
| HW_BREAKPOINT_W
) ==
731 evsel
->attr
.bp_type
);
732 TEST_ASSERT_VAL("wrong bp_len", HW_BREAKPOINT_LEN_4
==
737 static int test__checkevent_breakpoint_x(struct perf_evlist
*evlist
)
739 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
740 struct perf_evsel
, node
);
742 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist
->nr_entries
);
743 TEST_ASSERT_VAL("wrong type", PERF_TYPE_BREAKPOINT
== evsel
->attr
.type
);
744 TEST_ASSERT_VAL("wrong config", 0 == evsel
->attr
.config
);
745 TEST_ASSERT_VAL("wrong bp_type",
746 HW_BREAKPOINT_X
== evsel
->attr
.bp_type
);
747 TEST_ASSERT_VAL("wrong bp_len", sizeof(long) == evsel
->attr
.bp_len
);
751 static int test__checkevent_breakpoint_r(struct perf_evlist
*evlist
)
753 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
754 struct perf_evsel
, node
);
756 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist
->nr_entries
);
757 TEST_ASSERT_VAL("wrong type",
758 PERF_TYPE_BREAKPOINT
== evsel
->attr
.type
);
759 TEST_ASSERT_VAL("wrong config", 0 == evsel
->attr
.config
);
760 TEST_ASSERT_VAL("wrong bp_type",
761 HW_BREAKPOINT_R
== evsel
->attr
.bp_type
);
762 TEST_ASSERT_VAL("wrong bp_len",
763 HW_BREAKPOINT_LEN_4
== evsel
->attr
.bp_len
);
767 static int test__checkevent_breakpoint_w(struct perf_evlist
*evlist
)
769 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
770 struct perf_evsel
, node
);
772 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist
->nr_entries
);
773 TEST_ASSERT_VAL("wrong type",
774 PERF_TYPE_BREAKPOINT
== evsel
->attr
.type
);
775 TEST_ASSERT_VAL("wrong config", 0 == evsel
->attr
.config
);
776 TEST_ASSERT_VAL("wrong bp_type",
777 HW_BREAKPOINT_W
== evsel
->attr
.bp_type
);
778 TEST_ASSERT_VAL("wrong bp_len",
779 HW_BREAKPOINT_LEN_4
== evsel
->attr
.bp_len
);
783 static int test__checkevent_tracepoint_modifier(struct perf_evlist
*evlist
)
785 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
786 struct perf_evsel
, node
);
788 TEST_ASSERT_VAL("wrong exclude_user", evsel
->attr
.exclude_user
);
789 TEST_ASSERT_VAL("wrong exclude_kernel", !evsel
->attr
.exclude_kernel
);
790 TEST_ASSERT_VAL("wrong exclude_hv", evsel
->attr
.exclude_hv
);
791 TEST_ASSERT_VAL("wrong precise_ip", !evsel
->attr
.precise_ip
);
793 return test__checkevent_tracepoint(evlist
);
797 test__checkevent_tracepoint_multi_modifier(struct perf_evlist
*evlist
)
799 struct perf_evsel
*evsel
;
801 TEST_ASSERT_VAL("wrong number of entries", evlist
->nr_entries
> 1);
803 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
804 TEST_ASSERT_VAL("wrong exclude_user",
805 !evsel
->attr
.exclude_user
);
806 TEST_ASSERT_VAL("wrong exclude_kernel",
807 evsel
->attr
.exclude_kernel
);
808 TEST_ASSERT_VAL("wrong exclude_hv", evsel
->attr
.exclude_hv
);
809 TEST_ASSERT_VAL("wrong precise_ip", !evsel
->attr
.precise_ip
);
812 return test__checkevent_tracepoint_multi(evlist
);
815 static int test__checkevent_raw_modifier(struct perf_evlist
*evlist
)
817 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
818 struct perf_evsel
, node
);
820 TEST_ASSERT_VAL("wrong exclude_user", evsel
->attr
.exclude_user
);
821 TEST_ASSERT_VAL("wrong exclude_kernel", !evsel
->attr
.exclude_kernel
);
822 TEST_ASSERT_VAL("wrong exclude_hv", evsel
->attr
.exclude_hv
);
823 TEST_ASSERT_VAL("wrong precise_ip", evsel
->attr
.precise_ip
);
825 return test__checkevent_raw(evlist
);
828 static int test__checkevent_numeric_modifier(struct perf_evlist
*evlist
)
830 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
831 struct perf_evsel
, node
);
833 TEST_ASSERT_VAL("wrong exclude_user", evsel
->attr
.exclude_user
);
834 TEST_ASSERT_VAL("wrong exclude_kernel", evsel
->attr
.exclude_kernel
);
835 TEST_ASSERT_VAL("wrong exclude_hv", !evsel
->attr
.exclude_hv
);
836 TEST_ASSERT_VAL("wrong precise_ip", evsel
->attr
.precise_ip
);
838 return test__checkevent_numeric(evlist
);
841 static int test__checkevent_symbolic_name_modifier(struct perf_evlist
*evlist
)
843 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
844 struct perf_evsel
, node
);
846 TEST_ASSERT_VAL("wrong exclude_user", evsel
->attr
.exclude_user
);
847 TEST_ASSERT_VAL("wrong exclude_kernel", evsel
->attr
.exclude_kernel
);
848 TEST_ASSERT_VAL("wrong exclude_hv", !evsel
->attr
.exclude_hv
);
849 TEST_ASSERT_VAL("wrong precise_ip", !evsel
->attr
.precise_ip
);
851 return test__checkevent_symbolic_name(evlist
);
854 static int test__checkevent_exclude_host_modifier(struct perf_evlist
*evlist
)
856 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
857 struct perf_evsel
, node
);
859 TEST_ASSERT_VAL("wrong exclude guest", !evsel
->attr
.exclude_guest
);
860 TEST_ASSERT_VAL("wrong exclude host", evsel
->attr
.exclude_host
);
862 return test__checkevent_symbolic_name(evlist
);
865 static int test__checkevent_exclude_guest_modifier(struct perf_evlist
*evlist
)
867 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
868 struct perf_evsel
, node
);
870 TEST_ASSERT_VAL("wrong exclude guest", evsel
->attr
.exclude_guest
);
871 TEST_ASSERT_VAL("wrong exclude host", !evsel
->attr
.exclude_host
);
873 return test__checkevent_symbolic_name(evlist
);
876 static int test__checkevent_symbolic_alias_modifier(struct perf_evlist
*evlist
)
878 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
879 struct perf_evsel
, node
);
881 TEST_ASSERT_VAL("wrong exclude_user", !evsel
->attr
.exclude_user
);
882 TEST_ASSERT_VAL("wrong exclude_kernel", evsel
->attr
.exclude_kernel
);
883 TEST_ASSERT_VAL("wrong exclude_hv", evsel
->attr
.exclude_hv
);
884 TEST_ASSERT_VAL("wrong precise_ip", !evsel
->attr
.precise_ip
);
886 return test__checkevent_symbolic_alias(evlist
);
889 static int test__checkevent_genhw_modifier(struct perf_evlist
*evlist
)
891 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
892 struct perf_evsel
, node
);
894 TEST_ASSERT_VAL("wrong exclude_user", evsel
->attr
.exclude_user
);
895 TEST_ASSERT_VAL("wrong exclude_kernel", !evsel
->attr
.exclude_kernel
);
896 TEST_ASSERT_VAL("wrong exclude_hv", evsel
->attr
.exclude_hv
);
897 TEST_ASSERT_VAL("wrong precise_ip", evsel
->attr
.precise_ip
);
899 return test__checkevent_genhw(evlist
);
902 static int test__checkevent_breakpoint_modifier(struct perf_evlist
*evlist
)
904 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
905 struct perf_evsel
, node
);
907 TEST_ASSERT_VAL("wrong exclude_user", !evsel
->attr
.exclude_user
);
908 TEST_ASSERT_VAL("wrong exclude_kernel", evsel
->attr
.exclude_kernel
);
909 TEST_ASSERT_VAL("wrong exclude_hv", evsel
->attr
.exclude_hv
);
910 TEST_ASSERT_VAL("wrong precise_ip", !evsel
->attr
.precise_ip
);
912 return test__checkevent_breakpoint(evlist
);
915 static int test__checkevent_breakpoint_x_modifier(struct perf_evlist
*evlist
)
917 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
918 struct perf_evsel
, node
);
920 TEST_ASSERT_VAL("wrong exclude_user", evsel
->attr
.exclude_user
);
921 TEST_ASSERT_VAL("wrong exclude_kernel", !evsel
->attr
.exclude_kernel
);
922 TEST_ASSERT_VAL("wrong exclude_hv", evsel
->attr
.exclude_hv
);
923 TEST_ASSERT_VAL("wrong precise_ip", !evsel
->attr
.precise_ip
);
925 return test__checkevent_breakpoint_x(evlist
);
928 static int test__checkevent_breakpoint_r_modifier(struct perf_evlist
*evlist
)
930 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
931 struct perf_evsel
, node
);
933 TEST_ASSERT_VAL("wrong exclude_user", evsel
->attr
.exclude_user
);
934 TEST_ASSERT_VAL("wrong exclude_kernel", evsel
->attr
.exclude_kernel
);
935 TEST_ASSERT_VAL("wrong exclude_hv", !evsel
->attr
.exclude_hv
);
936 TEST_ASSERT_VAL("wrong precise_ip", evsel
->attr
.precise_ip
);
938 return test__checkevent_breakpoint_r(evlist
);
941 static int test__checkevent_breakpoint_w_modifier(struct perf_evlist
*evlist
)
943 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
944 struct perf_evsel
, node
);
946 TEST_ASSERT_VAL("wrong exclude_user", !evsel
->attr
.exclude_user
);
947 TEST_ASSERT_VAL("wrong exclude_kernel", evsel
->attr
.exclude_kernel
);
948 TEST_ASSERT_VAL("wrong exclude_hv", evsel
->attr
.exclude_hv
);
949 TEST_ASSERT_VAL("wrong precise_ip", evsel
->attr
.precise_ip
);
951 return test__checkevent_breakpoint_w(evlist
);
954 static int test__checkevent_pmu(struct perf_evlist
*evlist
)
957 struct perf_evsel
*evsel
= list_entry(evlist
->entries
.next
,
958 struct perf_evsel
, node
);
960 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist
->nr_entries
);
961 TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW
== evsel
->attr
.type
);
962 TEST_ASSERT_VAL("wrong config", 10 == evsel
->attr
.config
);
963 TEST_ASSERT_VAL("wrong config1", 1 == evsel
->attr
.config1
);
964 TEST_ASSERT_VAL("wrong config2", 3 == evsel
->attr
.config2
);
965 TEST_ASSERT_VAL("wrong period", 1000 == evsel
->attr
.sample_period
);
970 static int test__checkevent_list(struct perf_evlist
*evlist
)
972 struct perf_evsel
*evsel
;
974 TEST_ASSERT_VAL("wrong number of entries", 3 == evlist
->nr_entries
);
977 evsel
= list_entry(evlist
->entries
.next
, struct perf_evsel
, node
);
978 TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW
== evsel
->attr
.type
);
979 TEST_ASSERT_VAL("wrong config", 1 == evsel
->attr
.config
);
980 TEST_ASSERT_VAL("wrong config1", 0 == evsel
->attr
.config1
);
981 TEST_ASSERT_VAL("wrong config2", 0 == evsel
->attr
.config2
);
982 TEST_ASSERT_VAL("wrong exclude_user", !evsel
->attr
.exclude_user
);
983 TEST_ASSERT_VAL("wrong exclude_kernel", !evsel
->attr
.exclude_kernel
);
984 TEST_ASSERT_VAL("wrong exclude_hv", !evsel
->attr
.exclude_hv
);
985 TEST_ASSERT_VAL("wrong precise_ip", !evsel
->attr
.precise_ip
);
987 /* syscalls:sys_enter_open:k */
988 evsel
= list_entry(evsel
->node
.next
, struct perf_evsel
, node
);
989 TEST_ASSERT_VAL("wrong type", PERF_TYPE_TRACEPOINT
== evsel
->attr
.type
);
990 TEST_ASSERT_VAL("wrong sample_type",
991 (PERF_SAMPLE_RAW
| PERF_SAMPLE_TIME
| PERF_SAMPLE_CPU
) ==
992 evsel
->attr
.sample_type
);
993 TEST_ASSERT_VAL("wrong sample_period", 1 == evsel
->attr
.sample_period
);
994 TEST_ASSERT_VAL("wrong exclude_user", evsel
->attr
.exclude_user
);
995 TEST_ASSERT_VAL("wrong exclude_kernel", !evsel
->attr
.exclude_kernel
);
996 TEST_ASSERT_VAL("wrong exclude_hv", evsel
->attr
.exclude_hv
);
997 TEST_ASSERT_VAL("wrong precise_ip", !evsel
->attr
.precise_ip
);
1000 evsel
= list_entry(evsel
->node
.next
, struct perf_evsel
, node
);
1001 TEST_ASSERT_VAL("wrong type", 1 == evsel
->attr
.type
);
1002 TEST_ASSERT_VAL("wrong config", 1 == evsel
->attr
.config
);
1003 TEST_ASSERT_VAL("wrong exclude_user", evsel
->attr
.exclude_user
);
1004 TEST_ASSERT_VAL("wrong exclude_kernel", evsel
->attr
.exclude_kernel
);
1005 TEST_ASSERT_VAL("wrong exclude_hv", !evsel
->attr
.exclude_hv
);
1006 TEST_ASSERT_VAL("wrong precise_ip", evsel
->attr
.precise_ip
);
1011 static struct test__event_st
{
1014 int (*check
)(struct perf_evlist
*evlist
);
1015 } test__events
[] = {
1017 .name
= "syscalls:sys_enter_open",
1018 .check
= test__checkevent_tracepoint
,
1021 .name
= "syscalls:*",
1022 .check
= test__checkevent_tracepoint_multi
,
1026 .check
= test__checkevent_raw
,
1030 .check
= test__checkevent_numeric
,
1033 .name
= "instructions",
1034 .check
= test__checkevent_symbolic_name
,
1037 .name
= "cycles/period=100000,config2/",
1038 .check
= test__checkevent_symbolic_name_config
,
1042 .check
= test__checkevent_symbolic_alias
,
1045 .name
= "L1-dcache-load-miss",
1046 .check
= test__checkevent_genhw
,
1050 .check
= test__checkevent_breakpoint
,
1054 .check
= test__checkevent_breakpoint_x
,
1058 .check
= test__checkevent_breakpoint_r
,
1062 .check
= test__checkevent_breakpoint_w
,
1065 .name
= "syscalls:sys_enter_open:k",
1066 .check
= test__checkevent_tracepoint_modifier
,
1069 .name
= "syscalls:*:u",
1070 .check
= test__checkevent_tracepoint_multi_modifier
,
1074 .check
= test__checkevent_raw_modifier
,
1078 .check
= test__checkevent_numeric_modifier
,
1081 .name
= "instructions:h",
1082 .check
= test__checkevent_symbolic_name_modifier
,
1086 .check
= test__checkevent_symbolic_alias_modifier
,
1089 .name
= "L1-dcache-load-miss:kp",
1090 .check
= test__checkevent_genhw_modifier
,
1094 .check
= test__checkevent_breakpoint_modifier
,
1097 .name
= "mem:0:x:k",
1098 .check
= test__checkevent_breakpoint_x_modifier
,
1101 .name
= "mem:0:r:hp",
1102 .check
= test__checkevent_breakpoint_r_modifier
,
1105 .name
= "mem:0:w:up",
1106 .check
= test__checkevent_breakpoint_w_modifier
,
1109 .name
= "cpu/config=10,config1,config2=3,period=1000/u",
1110 .check
= test__checkevent_pmu
,
1113 .name
= "r1,syscalls:sys_enter_open:k,1:1:hp",
1114 .check
= test__checkevent_list
,
1117 .name
= "instructions:G",
1118 .check
= test__checkevent_exclude_host_modifier
,
1121 .name
= "instructions:H",
1122 .check
= test__checkevent_exclude_guest_modifier
,
1126 #define TEST__EVENTS_CNT (sizeof(test__events) / sizeof(struct test__event_st))
1128 static int test__parse_events(void)
1130 struct perf_evlist
*evlist
;
1134 for (i
= 0; i
< TEST__EVENTS_CNT
; i
++) {
1135 struct test__event_st
*e
= &test__events
[i
];
1137 evlist
= perf_evlist__new(NULL
, NULL
);
1141 ret
= parse_events(evlist
, e
->name
, 0);
1143 pr_debug("failed to parse event '%s', err %d\n",
1148 ret
= e
->check(evlist
);
1149 perf_evlist__delete(evlist
);
1157 static int sched__get_first_possible_cpu(pid_t pid
, cpu_set_t
**maskp
,
1162 int i
, cpu
= -1, nrcpus
= 1024;
1164 mask
= CPU_ALLOC(nrcpus
);
1165 size
= CPU_ALLOC_SIZE(nrcpus
);
1166 CPU_ZERO_S(size
, mask
);
1168 if (sched_getaffinity(pid
, size
, mask
) == -1) {
1170 if (errno
== EINVAL
&& nrcpus
< (1024 << 8)) {
1171 nrcpus
= nrcpus
<< 2;
1174 perror("sched_getaffinity");
1178 for (i
= 0; i
< nrcpus
; i
++) {
1179 if (CPU_ISSET_S(i
, size
, mask
)) {
1185 CPU_CLR_S(i
, size
, mask
);
1195 static int test__PERF_RECORD(void)
1197 struct perf_record_opts opts
= {
1206 cpu_set_t
*cpu_mask
= NULL
;
1207 size_t cpu_mask_size
= 0;
1208 struct perf_evlist
*evlist
= perf_evlist__new(NULL
, NULL
);
1209 struct perf_evsel
*evsel
;
1210 struct perf_sample sample
;
1211 const char *cmd
= "sleep";
1212 const char *argv
[] = { cmd
, "1", NULL
, };
1214 u64 sample_type
, prev_time
= 0;
1215 bool found_cmd_mmap
= false,
1216 found_libc_mmap
= false,
1217 found_vdso_mmap
= false,
1218 found_ld_mmap
= false;
1219 int err
= -1, errs
= 0, i
, wakeups
= 0, sample_size
;
1221 int total_events
= 0, nr_events
[PERF_RECORD_MAX
] = { 0, };
1223 if (evlist
== NULL
|| argv
== NULL
) {
1224 pr_debug("Not enough memory to create evlist\n");
1229 * We need at least one evsel in the evlist, use the default
1232 err
= perf_evlist__add_default(evlist
);
1234 pr_debug("Not enough memory to create evsel\n");
1235 goto out_delete_evlist
;
1239 * Create maps of threads and cpus to monitor. In this case
1240 * we start with all threads and cpus (-1, -1) but then in
1241 * perf_evlist__prepare_workload we'll fill in the only thread
1242 * we're monitoring, the one forked there.
1244 err
= perf_evlist__create_maps(evlist
, &opts
.target
);
1246 pr_debug("Not enough memory to create thread/cpu maps\n");
1247 goto out_delete_evlist
;
1251 * Prepare the workload in argv[] to run, it'll fork it, and then wait
1252 * for perf_evlist__start_workload() to exec it. This is done this way
1253 * so that we have time to open the evlist (calling sys_perf_event_open
1254 * on all the fds) and then mmap them.
1256 err
= perf_evlist__prepare_workload(evlist
, &opts
, argv
);
1258 pr_debug("Couldn't run the workload!\n");
1259 goto out_delete_evlist
;
1263 * Config the evsels, setting attr->comm on the first one, etc.
1265 evsel
= list_entry(evlist
->entries
.next
, struct perf_evsel
, node
);
1266 evsel
->attr
.sample_type
|= PERF_SAMPLE_CPU
;
1267 evsel
->attr
.sample_type
|= PERF_SAMPLE_TID
;
1268 evsel
->attr
.sample_type
|= PERF_SAMPLE_TIME
;
1269 perf_evlist__config_attrs(evlist
, &opts
);
1271 err
= sched__get_first_possible_cpu(evlist
->workload
.pid
, &cpu_mask
,
1274 pr_debug("sched__get_first_possible_cpu: %s\n", strerror(errno
));
1275 goto out_delete_evlist
;
1281 * So that we can check perf_sample.cpu on all the samples.
1283 if (sched_setaffinity(evlist
->workload
.pid
, cpu_mask_size
, cpu_mask
) < 0) {
1284 pr_debug("sched_setaffinity: %s\n", strerror(errno
));
1285 goto out_free_cpu_mask
;
1289 * Call sys_perf_event_open on all the fds on all the evsels,
1290 * grouping them if asked to.
1292 err
= perf_evlist__open(evlist
, opts
.group
);
1294 pr_debug("perf_evlist__open: %s\n", strerror(errno
));
1295 goto out_delete_evlist
;
1299 * mmap the first fd on a given CPU and ask for events for the other
1300 * fds in the same CPU to be injected in the same mmap ring buffer
1301 * (using ioctl(PERF_EVENT_IOC_SET_OUTPUT)).
1303 err
= perf_evlist__mmap(evlist
, opts
.mmap_pages
, false);
1305 pr_debug("perf_evlist__mmap: %s\n", strerror(errno
));
1306 goto out_delete_evlist
;
1310 * We'll need these two to parse the PERF_SAMPLE_* fields in each
1313 sample_type
= perf_evlist__sample_type(evlist
);
1314 sample_size
= __perf_evsel__sample_size(sample_type
);
1317 * Now that all is properly set up, enable the events, they will
1318 * count just on workload.pid, which will start...
1320 perf_evlist__enable(evlist
);
1325 perf_evlist__start_workload(evlist
);
1328 int before
= total_events
;
1330 for (i
= 0; i
< evlist
->nr_mmaps
; i
++) {
1331 union perf_event
*event
;
1333 while ((event
= perf_evlist__mmap_read(evlist
, i
)) != NULL
) {
1334 const u32 type
= event
->header
.type
;
1335 const char *name
= perf_event__name(type
);
1338 if (type
< PERF_RECORD_MAX
)
1341 err
= perf_event__parse_sample(event
, sample_type
,
1346 perf_event__fprintf(event
, stderr
);
1347 pr_debug("Couldn't parse sample\n");
1352 pr_info("%" PRIu64
" %d ", sample
.time
, sample
.cpu
);
1353 perf_event__fprintf(event
, stderr
);
1356 if (prev_time
> sample
.time
) {
1357 pr_debug("%s going backwards in time, prev=%" PRIu64
", curr=%" PRIu64
"\n",
1358 name
, prev_time
, sample
.time
);
1362 prev_time
= sample
.time
;
1364 if (sample
.cpu
!= cpu
) {
1365 pr_debug("%s with unexpected cpu, expected %d, got %d\n",
1366 name
, cpu
, sample
.cpu
);
1370 if ((pid_t
)sample
.pid
!= evlist
->workload
.pid
) {
1371 pr_debug("%s with unexpected pid, expected %d, got %d\n",
1372 name
, evlist
->workload
.pid
, sample
.pid
);
1376 if ((pid_t
)sample
.tid
!= evlist
->workload
.pid
) {
1377 pr_debug("%s with unexpected tid, expected %d, got %d\n",
1378 name
, evlist
->workload
.pid
, sample
.tid
);
1382 if ((type
== PERF_RECORD_COMM
||
1383 type
== PERF_RECORD_MMAP
||
1384 type
== PERF_RECORD_FORK
||
1385 type
== PERF_RECORD_EXIT
) &&
1386 (pid_t
)event
->comm
.pid
!= evlist
->workload
.pid
) {
1387 pr_debug("%s with unexpected pid/tid\n", name
);
1391 if ((type
== PERF_RECORD_COMM
||
1392 type
== PERF_RECORD_MMAP
) &&
1393 event
->comm
.pid
!= event
->comm
.tid
) {
1394 pr_debug("%s with different pid/tid!\n", name
);
1399 case PERF_RECORD_COMM
:
1400 if (strcmp(event
->comm
.comm
, cmd
)) {
1401 pr_debug("%s with unexpected comm!\n", name
);
1405 case PERF_RECORD_EXIT
:
1407 case PERF_RECORD_MMAP
:
1408 bname
= strrchr(event
->mmap
.filename
, '/');
1409 if (bname
!= NULL
) {
1410 if (!found_cmd_mmap
)
1411 found_cmd_mmap
= !strcmp(bname
+ 1, cmd
);
1412 if (!found_libc_mmap
)
1413 found_libc_mmap
= !strncmp(bname
+ 1, "libc", 4);
1415 found_ld_mmap
= !strncmp(bname
+ 1, "ld", 2);
1416 } else if (!found_vdso_mmap
)
1417 found_vdso_mmap
= !strcmp(event
->mmap
.filename
, "[vdso]");
1420 case PERF_RECORD_SAMPLE
:
1421 /* Just ignore samples for now */
1424 pr_debug("Unexpected perf_event->header.type %d!\n",
1432 * We don't use poll here because at least at 3.1 times the
1433 * PERF_RECORD_{!SAMPLE} events don't honour
1434 * perf_event_attr.wakeup_events, just PERF_EVENT_SAMPLE does.
1436 if (total_events
== before
&& false)
1437 poll(evlist
->pollfd
, evlist
->nr_fds
, -1);
1440 if (++wakeups
> 5) {
1441 pr_debug("No PERF_RECORD_EXIT event!\n");
1447 if (nr_events
[PERF_RECORD_COMM
] > 1) {
1448 pr_debug("Excessive number of PERF_RECORD_COMM events!\n");
1452 if (nr_events
[PERF_RECORD_COMM
] == 0) {
1453 pr_debug("Missing PERF_RECORD_COMM for %s!\n", cmd
);
1457 if (!found_cmd_mmap
) {
1458 pr_debug("PERF_RECORD_MMAP for %s missing!\n", cmd
);
1462 if (!found_libc_mmap
) {
1463 pr_debug("PERF_RECORD_MMAP for %s missing!\n", "libc");
1467 if (!found_ld_mmap
) {
1468 pr_debug("PERF_RECORD_MMAP for %s missing!\n", "ld");
1472 if (!found_vdso_mmap
) {
1473 pr_debug("PERF_RECORD_MMAP for %s missing!\n", "[vdso]");
1477 perf_evlist__munmap(evlist
);
1481 perf_evlist__delete(evlist
);
1483 return (err
< 0 || errs
> 0) ? -1 : 0;
1487 #if defined(__x86_64__) || defined(__i386__)
1489 #define barrier() asm volatile("" ::: "memory")
1491 static u64
rdpmc(unsigned int counter
)
1493 unsigned int low
, high
;
1495 asm volatile("rdpmc" : "=a" (low
), "=d" (high
) : "c" (counter
));
1497 return low
| ((u64
)high
) << 32;
1500 static u64
rdtsc(void)
1502 unsigned int low
, high
;
1504 asm volatile("rdtsc" : "=a" (low
), "=d" (high
));
1506 return low
| ((u64
)high
) << 32;
1509 static u64
mmap_read_self(void *addr
)
1511 struct perf_event_mmap_page
*pc
= addr
;
1512 u32 seq
, idx
, time_mult
= 0, time_shift
= 0;
1513 u64 count
, cyc
= 0, time_offset
= 0, enabled
, running
, delta
;
1519 enabled
= pc
->time_enabled
;
1520 running
= pc
->time_running
;
1522 if (enabled
!= running
) {
1524 time_mult
= pc
->time_mult
;
1525 time_shift
= pc
->time_shift
;
1526 time_offset
= pc
->time_offset
;
1532 count
+= rdpmc(idx
- 1);
1535 } while (pc
->lock
!= seq
);
1537 if (enabled
!= running
) {
1540 quot
= (cyc
>> time_shift
);
1541 rem
= cyc
& ((1 << time_shift
) - 1);
1542 delta
= time_offset
+ quot
* time_mult
+
1543 ((rem
* time_mult
) >> time_shift
);
1549 quot
= count
/ running
;
1550 rem
= count
% running
;
1551 count
= quot
* enabled
+ (rem
* enabled
) / running
;
1558 * If the RDPMC instruction faults then signal this back to the test parent task:
1560 static void segfault_handler(int sig __used
, siginfo_t
*info __used
, void *uc __used
)
1565 static int __test__rdpmc(void)
1567 long page_size
= sysconf(_SC_PAGE_SIZE
);
1568 volatile int tmp
= 0;
1569 u64 i
, loops
= 1000;
1573 struct perf_event_attr attr
= {
1574 .type
= PERF_TYPE_HARDWARE
,
1575 .config
= PERF_COUNT_HW_INSTRUCTIONS
,
1576 .exclude_kernel
= 1,
1579 struct sigaction sa
;
1581 sigfillset(&sa
.sa_mask
);
1582 sa
.sa_sigaction
= segfault_handler
;
1583 sigaction(SIGSEGV
, &sa
, NULL
);
1585 fd
= sys_perf_event_open(&attr
, 0, -1, -1, 0);
1587 die("Error: sys_perf_event_open() syscall returned "
1588 "with %d (%s)\n", fd
, strerror(errno
));
1591 addr
= mmap(NULL
, page_size
, PROT_READ
, MAP_SHARED
, fd
, 0);
1592 if (addr
== (void *)(-1)) {
1593 die("Error: mmap() syscall returned "
1594 "with (%s)\n", strerror(errno
));
1597 for (n
= 0; n
< 6; n
++) {
1598 u64 stamp
, now
, delta
;
1600 stamp
= mmap_read_self(addr
);
1602 for (i
= 0; i
< loops
; i
++)
1605 now
= mmap_read_self(addr
);
1608 delta
= now
- stamp
;
1609 pr_debug("%14d: %14Lu\n", n
, (long long)delta
);
1614 munmap(addr
, page_size
);
1625 static int test__rdpmc(void)
1637 ret
= __test__rdpmc();
1642 wret
= waitpid(pid
, &status
, 0);
1643 if (wret
< 0 || status
)
1651 static int test__perf_pmu(void)
1653 return perf_pmu__test();
1656 static struct test
{
1661 .desc
= "vmlinux symtab matches kallsyms",
1662 .func
= test__vmlinux_matches_kallsyms
,
1665 .desc
= "detect open syscall event",
1666 .func
= test__open_syscall_event
,
1669 .desc
= "detect open syscall event on all cpus",
1670 .func
= test__open_syscall_event_on_all_cpus
,
1673 .desc
= "read samples using the mmap interface",
1674 .func
= test__basic_mmap
,
1677 .desc
= "parse events tests",
1678 .func
= test__parse_events
,
1680 #if defined(__x86_64__) || defined(__i386__)
1682 .desc
= "x86 rdpmc test",
1683 .func
= test__rdpmc
,
1687 .desc
= "Validate PERF_RECORD_* events & perf_sample fields",
1688 .func
= test__PERF_RECORD
,
1691 .desc
= "Test perf pmu format parsing",
1692 .func
= test__perf_pmu
,
1699 static bool perf_test__matches(int curr
, int argc
, const char *argv
[])
1706 for (i
= 0; i
< argc
; ++i
) {
1708 long nr
= strtoul(argv
[i
], &end
, 10);
1716 if (strstr(tests
[curr
].desc
, argv
[i
]))
1723 static int __cmd_test(int argc
, const char *argv
[])
1727 while (tests
[i
].func
) {
1728 int curr
= i
++, err
;
1730 if (!perf_test__matches(curr
, argc
, argv
))
1733 pr_info("%2d: %s:", i
, tests
[curr
].desc
);
1734 pr_debug("\n--- start ---\n");
1735 err
= tests
[curr
].func();
1736 pr_debug("---- end ----\n%s:", tests
[curr
].desc
);
1737 pr_info(" %s\n", err
? "FAILED!\n" : "Ok");
1743 static int perf_test__list(int argc
, const char **argv
)
1747 while (tests
[i
].func
) {
1750 if (argc
> 1 && !strstr(tests
[curr
].desc
, argv
[1]))
1753 pr_info("%2d: %s\n", i
, tests
[curr
].desc
);
1759 int cmd_test(int argc
, const char **argv
, const char *prefix __used
)
1761 const char * const test_usage
[] = {
1762 "perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]",
1765 const struct option test_options
[] = {
1766 OPT_INCR('v', "verbose", &verbose
,
1767 "be more verbose (show symbol address, etc)"),
1771 argc
= parse_options(argc
, argv
, test_options
, test_usage
, 0);
1772 if (argc
>= 1 && !strcmp(argv
[0], "list"))
1773 return perf_test__list(argc
, argv
);
1775 symbol_conf
.priv_size
= sizeof(int);
1776 symbol_conf
.sort_by_name
= true;
1777 symbol_conf
.try_vmlinux_path
= true;
1779 if (symbol__init() < 0)
1782 return __cmd_test(argc
, argv
);