[linux-block.git] / tools / perf / tests / perf-record.c

// SPDX-License-Identifier: GPL-2.0
#include <errno.h>
#include <inttypes.h>
/* For the CLR_() macros */
#include <pthread.h>

#include <sched.h>
#include "evlist.h"
#include "evsel.h"
#include "perf.h"
#include "debug.h"
#include "tests.h"

static int sched__get_first_possible_cpu(pid_t pid, cpu_set_t *maskp)
{
	int i, cpu = -1, nrcpus = 1024;
realloc:
	CPU_ZERO(maskp);

	if (sched_getaffinity(pid, sizeof(*maskp), maskp) == -1) {
		if (errno == EINVAL && nrcpus < (1024 << 8)) {
			nrcpus = nrcpus << 2;
			goto realloc;
		}
		perror("sched_getaffinity");
			return -1;
	}

	for (i = 0; i < nrcpus; i++) {
		if (CPU_ISSET(i, maskp)) {
			if (cpu == -1)
				cpu = i;
			else
				CPU_CLR(i, maskp);
		}
	}

	return cpu;
}

int test__PERF_RECORD(struct test *test __maybe_unused, int subtest __maybe_unused)
{
	struct record_opts opts = {
		.target = {
			.uid = UINT_MAX,
			.uses_mmap = true,
		},
		.no_buffering = true,
		.mmap_pages   = 256,
	};
	cpu_set_t cpu_mask;
	size_t cpu_mask_size = sizeof(cpu_mask);
	struct evlist *evlist = perf_evlist__new_dummy();
	struct evsel *evsel;
	struct perf_sample sample;
	const char *cmd = "sleep";
	const char *argv[] = { cmd, "1", NULL, };
	char *bname, *mmap_filename;
	u64 prev_time = 0;
	bool found_cmd_mmap = false,
	     found_coreutils_mmap = false,
	     found_libc_mmap = false,
	     found_vdso_mmap = false,
	     found_ld_mmap = false;
	int err = -1, errs = 0, i, wakeups = 0;
	u32 cpu;
	int total_events = 0, nr_events[PERF_RECORD_MAX] = { 0, };
	char sbuf[STRERR_BUFSIZE];

	if (evlist == NULL) /* Fallback for kernels lacking PERF_COUNT_SW_DUMMY */
		evlist = perf_evlist__new_default();

	if (evlist == NULL) {
		pr_debug("Not enough memory to create evlist\n");
		goto out;
	}

	/*
	 * Create maps of threads and cpus to monitor. In this case
	 * we start with all threads and cpus (-1, -1) but then in
	 * perf_evlist__prepare_workload we'll fill in the only thread
	 * we're monitoring, the one forked there.
	 */
	err = perf_evlist__create_maps(evlist, &opts.target);
	if (err < 0) {
		pr_debug("Not enough memory to create thread/cpu maps\n");
		goto out_delete_evlist;
	}

	/*
	 * Prepare the workload in argv[] to run, it'll fork it, and then wait
	 * for perf_evlist__start_workload() to exec it. This is done this way
	 * so that we have time to open the evlist (calling sys_perf_event_open
	 * on all the fds) and then mmap them.
	 */
	err = perf_evlist__prepare_workload(evlist, &opts.target, argv, false, NULL);
	if (err < 0) {
		pr_debug("Couldn't run the workload!\n");
		goto out_delete_evlist;
	}

	/*
	 * Config the evsels, setting attr->comm on the first one, etc.
	 */
	evsel = perf_evlist__first(evlist);
	perf_evsel__set_sample_bit(evsel, CPU);
	perf_evsel__set_sample_bit(evsel, TID);
	perf_evsel__set_sample_bit(evsel, TIME);
	perf_evlist__config(evlist, &opts, NULL);

	err = sched__get_first_possible_cpu(evlist->workload.pid, &cpu_mask);
	if (err < 0) {
		pr_debug("sched__get_first_possible_cpu: %s\n",
			 str_error_r(errno, sbuf, sizeof(sbuf)));
		goto out_delete_evlist;
	}

	cpu = err;

	/*
	 * So that we can check perf_sample.cpu on all the samples.
	 */
	if (sched_setaffinity(evlist->workload.pid, cpu_mask_size, &cpu_mask) < 0) {
		pr_debug("sched_setaffinity: %s\n",
			 str_error_r(errno, sbuf, sizeof(sbuf)));
		goto out_delete_evlist;
	}

	/*
	 * Call sys_perf_event_open on all the fds on all the evsels,
	 * grouping them if asked to.
	 */
	err = perf_evlist__open(evlist);
	if (err < 0) {
		pr_debug("perf_evlist__open: %s\n",
			 str_error_r(errno, sbuf, sizeof(sbuf)));
		goto out_delete_evlist;
	}

	/*
	 * mmap the first fd on a given CPU and ask for events for the other
	 * fds in the same CPU to be injected in the same mmap ring buffer
	 * (using ioctl(PERF_EVENT_IOC_SET_OUTPUT)).
	 */
	err = perf_evlist__mmap(evlist, opts.mmap_pages);
	if (err < 0) {
		pr_debug("perf_evlist__mmap: %s\n",
			 str_error_r(errno, sbuf, sizeof(sbuf)));
		goto out_delete_evlist;
	}

	/*
	 * Now that all is properly set up, enable the events, they will
	 * count just on workload.pid, which will start...
	 */
	perf_evlist__enable(evlist);

	/*
	 * Now!
	 */
	perf_evlist__start_workload(evlist);

	while (1) {
		int before = total_events;

		for (i = 0; i < evlist->nr_mmaps; i++) {
			union perf_event *event;
			struct perf_mmap *md;

			md = &evlist->mmap[i];
			if (perf_mmap__read_init(md) < 0)
				continue;

			while ((event = perf_mmap__read_event(md)) != NULL) {
				const u32 type = event->header.type;
				const char *name = perf_event__name(type);

				++total_events;
				if (type < PERF_RECORD_MAX)
					nr_events[type]++;

				err = perf_evlist__parse_sample(evlist, event, &sample);
				if (err < 0) {
					if (verbose > 0)
						perf_event__fprintf(event, stderr);
					pr_debug("Couldn't parse sample\n");
					goto out_delete_evlist;
				}

				if (verbose > 0) {
					pr_info("%" PRIu64" %d ", sample.time, sample.cpu);
					perf_event__fprintf(event, stderr);
				}

				if (prev_time > sample.time) {
					pr_debug("%s going backwards in time, prev=%" PRIu64 ", curr=%" PRIu64 "\n",
						 name, prev_time, sample.time);
					++errs;
				}

				prev_time = sample.time;

				if (sample.cpu != cpu) {
					pr_debug("%s with unexpected cpu, expected %d, got %d\n",
						 name, cpu, sample.cpu);
					++errs;
				}

				if ((pid_t)sample.pid != evlist->workload.pid) {
					pr_debug("%s with unexpected pid, expected %d, got %d\n",
						 name, evlist->workload.pid, sample.pid);
					++errs;
				}

				if ((pid_t)sample.tid != evlist->workload.pid) {
					pr_debug("%s with unexpected tid, expected %d, got %d\n",
						 name, evlist->workload.pid, sample.tid);
					++errs;
				}

				if ((type == PERF_RECORD_COMM ||
				     type == PERF_RECORD_MMAP ||
				     type == PERF_RECORD_MMAP2 ||
				     type == PERF_RECORD_FORK ||
				     type == PERF_RECORD_EXIT) &&
				     (pid_t)event->comm.pid != evlist->workload.pid) {
					pr_debug("%s with unexpected pid/tid\n", name);
					++errs;
				}

				if ((type == PERF_RECORD_COMM ||
				     type == PERF_RECORD_MMAP ||
				     type == PERF_RECORD_MMAP2) &&
				     event->comm.pid != event->comm.tid) {
					pr_debug("%s with different pid/tid!\n", name);
					++errs;
				}

				switch (type) {
				case PERF_RECORD_COMM:
					if (strcmp(event->comm.comm, cmd)) {
						pr_debug("%s with unexpected comm!\n", name);
						++errs;
					}
					break;
				case PERF_RECORD_EXIT:
					goto found_exit;
				case PERF_RECORD_MMAP:
					mmap_filename = event->mmap.filename;
					goto check_bname;
				case PERF_RECORD_MMAP2:
					mmap_filename = event->mmap2.filename;
				check_bname:
					bname = strrchr(mmap_filename, '/');
					if (bname != NULL) {
						if (!found_cmd_mmap)
							found_cmd_mmap = !strcmp(bname + 1, cmd);
						if (!found_coreutils_mmap)
							found_coreutils_mmap = !strcmp(bname + 1, "coreutils");
						if (!found_libc_mmap)
							found_libc_mmap = !strncmp(bname + 1, "libc", 4);
						if (!found_ld_mmap)
							found_ld_mmap = !strncmp(bname + 1, "ld", 2);
					} else if (!found_vdso_mmap)
						found_vdso_mmap = !strcmp(mmap_filename, "[vdso]");
					break;

				case PERF_RECORD_SAMPLE:
					/* Just ignore samples for now */
					break;
				default:
					pr_debug("Unexpected perf_event->header.type %d!\n",
						 type);
					++errs;
				}

				perf_mmap__consume(md);
			}
			perf_mmap__read_done(md);
		}

		/*
		 * We don't use poll here because at least at 3.1 times the
		 * PERF_RECORD_{!SAMPLE} events don't honour
		 * perf_event_attr.wakeup_events, just PERF_EVENT_SAMPLE does.
		 */
		if (total_events == before && false)
			perf_evlist__poll(evlist, -1);

		sleep(1);
		if (++wakeups > 5) {
			pr_debug("No PERF_RECORD_EXIT event!\n");
			break;
		}
	}

found_exit:
	if (nr_events[PERF_RECORD_COMM] > 1 + !!found_coreutils_mmap) {
		pr_debug("Excessive number of PERF_RECORD_COMM events!\n");
		++errs;
	}

	if (nr_events[PERF_RECORD_COMM] == 0) {
		pr_debug("Missing PERF_RECORD_COMM for %s!\n", cmd);
		++errs;
	}

	if (!found_cmd_mmap && !found_coreutils_mmap) {
		pr_debug("PERF_RECORD_MMAP for %s missing!\n", cmd);
		++errs;
	}

	if (!found_libc_mmap) {
		pr_debug("PERF_RECORD_MMAP for %s missing!\n", "libc");
		++errs;
	}

	if (!found_ld_mmap) {
		pr_debug("PERF_RECORD_MMAP for %s missing!\n", "ld");
		++errs;
	}

	if (!found_vdso_mmap) {
		pr_debug("PERF_RECORD_MMAP for %s missing!\n", "[vdso]");
		++errs;
	}
out_delete_evlist:
	perf_evlist__delete(evlist);
out:
	return (err < 0 || errs > 0) ? -1 : 0;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
a43783ae	2	#include <errno.h>
fd20e811	3	#include <inttypes.h>
1fbe7df8 ACM	4	/* For the CLR_() macros */
	5	#include <pthread.h>
	6
16d00fee JO	7	#include <sched.h>
	8	#include "evlist.h"
	9	#include "evsel.h"
	10	#include "perf.h"
	11	#include "debug.h"
	12	#include "tests.h"
	13
	14	static int sched__get_first_possible_cpu(pid_t pid, cpu_set_t *maskp)
	15	{
	16	int i, cpu = -1, nrcpus = 1024;
	17	realloc:
	18	CPU_ZERO(maskp);
	19
	20	if (sched_getaffinity(pid, sizeof(*maskp), maskp) == -1) {
	21	if (errno == EINVAL && nrcpus < (1024 << 8)) {
	22	nrcpus = nrcpus << 2;
	23	goto realloc;
	24	}
	25	perror("sched_getaffinity");
	26	return -1;
	27	}
	28
	29	for (i = 0; i < nrcpus; i++) {
	30	if (CPU_ISSET(i, maskp)) {
	31	if (cpu == -1)
	32	cpu = i;
	33	else
	34	CPU_CLR(i, maskp);
	35	}
	36	}
	37
	38	return cpu;
	39	}
	40
81f17c90	41	int test__PERF_RECORD(struct test *test __maybe_unused, int subtest __maybe_unused)
16d00fee	42	{
b4006796	43	struct record_opts opts = {
16d00fee JO	44	.target = {
	45	.uid = UINT_MAX,
	46	.uses_mmap = true,
	47	},
509051ea	48	.no_buffering = true,
509051ea	49	.mmap_pages = 256,
16d00fee JO	50	};
	51	cpu_set_t cpu_mask;
	52	size_t cpu_mask_size = sizeof(cpu_mask);
63503dba	53	struct evlist *evlist = perf_evlist__new_dummy();
32dcd021	54	struct evsel *evsel;
16d00fee JO	55	struct perf_sample sample;
	56	const char *cmd = "sleep";
	57	const char *argv[] = { cmd, "1", NULL, };
5c5e854b	58	char bname, mmap_filename;
16d00fee JO	59	u64 prev_time = 0;
16d00fee JO	60	bool found_cmd_mmap = false,
2aac9f9d	61	found_coreutils_mmap = false,
16d00fee JO	62	found_libc_mmap = false,
	63	found_vdso_mmap = false,
	64	found_ld_mmap = false;
	65	int err = -1, errs = 0, i, wakeups = 0;
	66	u32 cpu;
	67	int total_events = 0, nr_events[PERF_RECORD_MAX] = { 0, };
ba3dfff8	68	char sbuf[STRERR_BUFSIZE];
16d00fee	69
69ef8f47 ACM	70	if (evlist == NULL) /* Fallback for kernels lacking PERF_COUNT_SW_DUMMY */
	71	evlist = perf_evlist__new_default();
	72
9ef6839b	73	if (evlist == NULL) {
16d00fee JO	74	pr_debug("Not enough memory to create evlist\n");
	75	goto out;
	76	}
	77
16d00fee JO	78	/*
	79	* Create maps of threads and cpus to monitor. In this case
	80	* we start with all threads and cpus (-1, -1) but then in
	81	* perf_evlist__prepare_workload we'll fill in the only thread
	82	* we're monitoring, the one forked there.
	83	*/
	84	err = perf_evlist__create_maps(evlist, &opts.target);
	85	if (err < 0) {
	86	pr_debug("Not enough memory to create thread/cpu maps\n");
	87	goto out_delete_evlist;
	88	}
	89
	90	/*
	91	* Prepare the workload in argv[] to run, it'll fork it, and then wait
	92	* for perf_evlist__start_workload() to exec it. This is done this way
	93	* so that we have time to open the evlist (calling sys_perf_event_open
	94	* on all the fds) and then mmap them.
	95	*/
735f7e0b	96	err = perf_evlist__prepare_workload(evlist, &opts.target, argv, false, NULL);
16d00fee JO	97	if (err < 0) {
16d00fee JO	98	pr_debug("Couldn't run the workload!\n");
03ad9747	99	goto out_delete_evlist;
16d00fee JO	100	}
	101
	102	/*
	103	* Config the evsels, setting attr->comm on the first one, etc.
	104	*/
	105	evsel = perf_evlist__first(evlist);
7be5ebe8 ACM	106	perf_evsel__set_sample_bit(evsel, CPU);
	107	perf_evsel__set_sample_bit(evsel, TID);
	108	perf_evsel__set_sample_bit(evsel, TIME);
e68ae9cf	109	perf_evlist__config(evlist, &opts, NULL);
16d00fee JO	110
	111	err = sched__get_first_possible_cpu(evlist->workload.pid, &cpu_mask);
	112	if (err < 0) {
ba3dfff8	113	pr_debug("sched__get_first_possible_cpu: %s\n",
c8b5f2c9	114	str_error_r(errno, sbuf, sizeof(sbuf)));
03ad9747	115	goto out_delete_evlist;
16d00fee JO	116	}
	117
	118	cpu = err;
	119
	120	/*
	121	* So that we can check perf_sample.cpu on all the samples.
	122	*/
	123	if (sched_setaffinity(evlist->workload.pid, cpu_mask_size, &cpu_mask) < 0) {
ba3dfff8	124	pr_debug("sched_setaffinity: %s\n",
c8b5f2c9	125	str_error_r(errno, sbuf, sizeof(sbuf)));
03ad9747	126	goto out_delete_evlist;
16d00fee JO	127	}
	128
	129	/*
	130	* Call sys_perf_event_open on all the fds on all the evsels,
	131	* grouping them if asked to.
	132	*/
	133	err = perf_evlist__open(evlist);
	134	if (err < 0) {
ba3dfff8	135	pr_debug("perf_evlist__open: %s\n",
c8b5f2c9	136	str_error_r(errno, sbuf, sizeof(sbuf)));
03ad9747	137	goto out_delete_evlist;
16d00fee JO	138	}
	139
	140	/*
	141	* mmap the first fd on a given CPU and ask for events for the other
	142	* fds in the same CPU to be injected in the same mmap ring buffer
	143	* (using ioctl(PERF_EVENT_IOC_SET_OUTPUT)).
	144	*/
f74b9d3a	145	err = perf_evlist__mmap(evlist, opts.mmap_pages);
16d00fee	146	if (err < 0) {
ba3dfff8	147	pr_debug("perf_evlist__mmap: %s\n",
c8b5f2c9	148	str_error_r(errno, sbuf, sizeof(sbuf)));
f26e1c7c	149	goto out_delete_evlist;
16d00fee JO	150	}
	151
	152	/*
	153	* Now that all is properly set up, enable the events, they will
	154	* count just on workload.pid, which will start...
	155	*/
	156	perf_evlist__enable(evlist);
	157
	158	/*
	159	* Now!
	160	*/
	161	perf_evlist__start_workload(evlist);
	162
	163	while (1) {
	164	int before = total_events;
	165
	166	for (i = 0; i < evlist->nr_mmaps; i++) {
	167	union perf_event *event;
88e37a4b	168	struct perf_mmap *md;
16d00fee	169
88e37a4b	170	md = &evlist->mmap[i];
b9bae2c8	171	if (perf_mmap__read_init(md) < 0)
88e37a4b KL	172	continue;
88e37a4b KL	173
0019dc87	174	while ((event = perf_mmap__read_event(md)) != NULL) {
16d00fee JO	175	const u32 type = event->header.type;
	176	const char *name = perf_event__name(type);
	177
	178	++total_events;
	179	if (type < PERF_RECORD_MAX)
	180	nr_events[type]++;
	181
	182	err = perf_evlist__parse_sample(evlist, event, &sample);
	183	if (err < 0) {
bb963e16	184	if (verbose > 0)
16d00fee JO	185	perf_event__fprintf(event, stderr);
16d00fee JO	186	pr_debug("Couldn't parse sample\n");
983874d1	187	goto out_delete_evlist;
16d00fee JO	188	}
16d00fee JO	189
bb963e16	190	if (verbose > 0) {
16d00fee JO	191	pr_info("%" PRIu64" %d ", sample.time, sample.cpu);
	192	perf_event__fprintf(event, stderr);
	193	}
	194
	195	if (prev_time > sample.time) {
	196	pr_debug("%s going backwards in time, prev=%" PRIu64 ", curr=%" PRIu64 "\n",
	197	name, prev_time, sample.time);
	198	++errs;
	199	}
	200
	201	prev_time = sample.time;
	202
	203	if (sample.cpu != cpu) {
	204	pr_debug("%s with unexpected cpu, expected %d, got %d\n",
	205	name, cpu, sample.cpu);
	206	++errs;
	207	}
	208
	209	if ((pid_t)sample.pid != evlist->workload.pid) {
	210	pr_debug("%s with unexpected pid, expected %d, got %d\n",
	211	name, evlist->workload.pid, sample.pid);
	212	++errs;
	213	}
	214
	215	if ((pid_t)sample.tid != evlist->workload.pid) {
	216	pr_debug("%s with unexpected tid, expected %d, got %d\n",
	217	name, evlist->workload.pid, sample.tid);
	218	++errs;
	219	}
	220
	221	if ((type == PERF_RECORD_COMM \|\|
	222	type == PERF_RECORD_MMAP \|\|
5c5e854b	223	type == PERF_RECORD_MMAP2 \|\|
16d00fee JO	224	type == PERF_RECORD_FORK \|\|
	225	type == PERF_RECORD_EXIT) &&
	226	(pid_t)event->comm.pid != evlist->workload.pid) {
	227	pr_debug("%s with unexpected pid/tid\n", name);
	228	++errs;
	229	}
	230
	231	if ((type == PERF_RECORD_COMM \|\|
5c5e854b SE	232	type == PERF_RECORD_MMAP \|\|
5c5e854b SE	233	type == PERF_RECORD_MMAP2) &&
16d00fee JO	234	event->comm.pid != event->comm.tid) {
	235	pr_debug("%s with different pid/tid!\n", name);
	236	++errs;
	237	}
	238
	239	switch (type) {
	240	case PERF_RECORD_COMM:
	241	if (strcmp(event->comm.comm, cmd)) {
	242	pr_debug("%s with unexpected comm!\n", name);
	243	++errs;
	244	}
	245	break;
	246	case PERF_RECORD_EXIT:
	247	goto found_exit;
	248	case PERF_RECORD_MMAP:
5c5e854b SE	249	mmap_filename = event->mmap.filename;
	250	goto check_bname;
	251	case PERF_RECORD_MMAP2:
	252	mmap_filename = event->mmap2.filename;
	253	check_bname:
	254	bname = strrchr(mmap_filename, '/');
16d00fee JO	255	if (bname != NULL) {
	256	if (!found_cmd_mmap)
	257	found_cmd_mmap = !strcmp(bname + 1, cmd);
2aac9f9d AH	258	if (!found_coreutils_mmap)
2aac9f9d AH	259	found_coreutils_mmap = !strcmp(bname + 1, "coreutils");
16d00fee JO	260	if (!found_libc_mmap)
	261	found_libc_mmap = !strncmp(bname + 1, "libc", 4);
	262	if (!found_ld_mmap)
	263	found_ld_mmap = !strncmp(bname + 1, "ld", 2);
	264	} else if (!found_vdso_mmap)
5c5e854b	265	found_vdso_mmap = !strcmp(mmap_filename, "[vdso]");
16d00fee JO	266	break;
	267
	268	case PERF_RECORD_SAMPLE:
	269	/* Just ignore samples for now */
	270	break;
	271	default:
	272	pr_debug("Unexpected perf_event->header.type %d!\n",
	273	type);
	274	++errs;
	275	}
8e50d384	276
d6ace3df	277	perf_mmap__consume(md);
16d00fee	278	}
88e37a4b	279	perf_mmap__read_done(md);
16d00fee JO	280	}
	281
	282	/*
	283	* We don't use poll here because at least at 3.1 times the
	284	* PERF_RECORD_{!SAMPLE} events don't honour
	285	* perf_event_attr.wakeup_events, just PERF_EVENT_SAMPLE does.
	286	*/
	287	if (total_events == before && false)
f66a889d	288	perf_evlist__poll(evlist, -1);
16d00fee JO	289
	290	sleep(1);
	291	if (++wakeups > 5) {
	292	pr_debug("No PERF_RECORD_EXIT event!\n");
	293	break;
	294	}
	295	}
	296
	297	found_exit:
2aac9f9d	298	if (nr_events[PERF_RECORD_COMM] > 1 + !!found_coreutils_mmap) {
16d00fee JO	299	pr_debug("Excessive number of PERF_RECORD_COMM events!\n");
	300	++errs;
	301	}
	302
	303	if (nr_events[PERF_RECORD_COMM] == 0) {
	304	pr_debug("Missing PERF_RECORD_COMM for %s!\n", cmd);
	305	++errs;
	306	}
	307
2aac9f9d	308	if (!found_cmd_mmap && !found_coreutils_mmap) {
16d00fee JO	309	pr_debug("PERF_RECORD_MMAP for %s missing!\n", cmd);
	310	++errs;
	311	}
	312
	313	if (!found_libc_mmap) {
	314	pr_debug("PERF_RECORD_MMAP for %s missing!\n", "libc");
	315	++errs;
	316	}
	317
	318	if (!found_ld_mmap) {
	319	pr_debug("PERF_RECORD_MMAP for %s missing!\n", "ld");
	320	++errs;
	321	}
	322
	323	if (!found_vdso_mmap) {
	324	pr_debug("PERF_RECORD_MMAP for %s missing!\n", "[vdso]");
	325	++errs;
	326	}
16d00fee JO	327	out_delete_evlist:
	328	perf_evlist__delete(evlist);
	329	out:
	330	return (err < 0 \|\| errs > 0) ? -1 : 0;
	331	}