[mirror_ubuntu-jammy-kernel.git] / tools / perf / util / evlist.c

/*
 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
 *
 * Parts came from builtin-{top,stat,record}.c, see those files for further
 * copyright notes.
 *
 * Released under the GPL v2. (and only v2, not any later version)
 */
#include <poll.h>
#include "cpumap.h"
#include "thread_map.h"
#include "evlist.h"
#include "evsel.h"
#include "util.h"

#include <sys/mman.h>

#include <linux/bitops.h>
#include <linux/hash.h>

#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
#define SID(e, x, y) xyarray__entry(e->id, x, y)

void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus,
		       struct thread_map *threads)
{
	int i;

	for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i)
		INIT_HLIST_HEAD(&evlist->heads[i]);
	INIT_LIST_HEAD(&evlist->entries);
	perf_evlist__set_maps(evlist, cpus, threads);
}

struct perf_evlist *perf_evlist__new(struct cpu_map *cpus,
				     struct thread_map *threads)
{
	struct perf_evlist *evlist = zalloc(sizeof(*evlist));

	if (evlist != NULL)
		perf_evlist__init(evlist, cpus, threads);

	return evlist;
}

static void perf_evlist__purge(struct perf_evlist *evlist)
{
	struct perf_evsel *pos, *n;

	list_for_each_entry_safe(pos, n, &evlist->entries, node) {
		list_del_init(&pos->node);
		perf_evsel__delete(pos);
	}

	evlist->nr_entries = 0;
}

void perf_evlist__exit(struct perf_evlist *evlist)
{
	free(evlist->mmap);
	free(evlist->pollfd);
	evlist->mmap = NULL;
	evlist->pollfd = NULL;
}

void perf_evlist__delete(struct perf_evlist *evlist)
{
	perf_evlist__purge(evlist);
	perf_evlist__exit(evlist);
	free(evlist);
}

void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry)
{
	list_add_tail(&entry->node, &evlist->entries);
	++evlist->nr_entries;
}

int perf_evlist__add_default(struct perf_evlist *evlist)
{
	struct perf_event_attr attr = {
		.type = PERF_TYPE_HARDWARE,
		.config = PERF_COUNT_HW_CPU_CYCLES,
	};
	struct perf_evsel *evsel = perf_evsel__new(&attr, 0);

	if (evsel == NULL)
		return -ENOMEM;

	perf_evlist__add(evlist, evsel);
	return 0;
}

int perf_evlist__alloc_pollfd(struct perf_evlist *evlist)
{
	int nfds = evlist->cpus->nr * evlist->threads->nr * evlist->nr_entries;
	evlist->pollfd = malloc(sizeof(struct pollfd) * nfds);
	return evlist->pollfd != NULL ? 0 : -ENOMEM;
}

void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd)
{
	fcntl(fd, F_SETFL, O_NONBLOCK);
	evlist->pollfd[evlist->nr_fds].fd = fd;
	evlist->pollfd[evlist->nr_fds].events = POLLIN;
	evlist->nr_fds++;
}

static int perf_evlist__id_hash(struct perf_evlist *evlist, struct perf_evsel *evsel,
			       int cpu, int thread, int fd)
{
	struct perf_sample_id *sid;
	u64 read_data[4] = { 0, };
	int hash, id_idx = 1; /* The first entry is the counter value */

	if (!(evsel->attr.read_format & PERF_FORMAT_ID) ||
	    read(fd, &read_data, sizeof(read_data)) == -1)
		return -1;

	if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
		++id_idx;
	if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
		++id_idx;

	sid = SID(evsel, cpu, thread);
	sid->id = read_data[id_idx];
	sid->evsel = evsel;
	hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS);
	hlist_add_head(&sid->node, &evlist->heads[hash]);
	return 0;
}

struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)
{
	struct hlist_head *head;
	struct hlist_node *pos;
	struct perf_sample_id *sid;
	int hash;

	if (evlist->nr_entries == 1)
		return list_entry(evlist->entries.next, struct perf_evsel, node);

	hash = hash_64(id, PERF_EVLIST__HLIST_BITS);
	head = &evlist->heads[hash];

	hlist_for_each_entry(sid, pos, head, node)
		if (sid->id == id)
			return sid->evsel;
	return NULL;
}

union perf_event *perf_evlist__read_on_cpu(struct perf_evlist *evlist, int cpu)
{
	/* XXX Move this to perf.c, making it generally available */
	unsigned int page_size = sysconf(_SC_PAGE_SIZE);
	struct perf_mmap *md = &evlist->mmap[cpu];
	unsigned int head = perf_mmap__read_head(md);
	unsigned int old = md->prev;
	unsigned char *data = md->base + page_size;
	union perf_event *event = NULL;

	if (evlist->overwrite) {
		/*
		 * If we're further behind than half the buffer, there's a chance
		 * the writer will bite our tail and mess up the samples under us.
		 *
		 * If we somehow ended up ahead of the head, we got messed up.
		 *
		 * In either case, truncate and restart at head.
		 */
		int diff = head - old;
		if (diff > md->mask / 2 || diff < 0) {
			fprintf(stderr, "WARNING: failed to keep up with mmap data.\n");

			/*
			 * head points to a known good entry, start there.
			 */
			old = head;
		}
	}

	if (old != head) {
		size_t size;

		event = (union perf_event *)&data[old & md->mask];
		size = event->header.size;

		/*
		 * Event straddles the mmap boundary -- header should always
		 * be inside due to u64 alignment of output.
		 */
		if ((old & md->mask) + size != ((old + size) & md->mask)) {
			unsigned int offset = old;
			unsigned int len = min(sizeof(*event), size), cpy;
			void *dst = &evlist->event_copy;

			do {
				cpy = min(md->mask + 1 - (offset & md->mask), len);
				memcpy(dst, &data[offset & md->mask], cpy);
				offset += cpy;
				dst += cpy;
				len -= cpy;
			} while (len);

			event = &evlist->event_copy;
		}

		old += size;
	}

	md->prev = old;

	if (!evlist->overwrite)
		perf_mmap__write_tail(md, old);

	return event;
}

void perf_evlist__munmap(struct perf_evlist *evlist)
{
	int cpu;

	for (cpu = 0; cpu < evlist->cpus->nr; cpu++) {
		if (evlist->mmap[cpu].base != NULL) {
			munmap(evlist->mmap[cpu].base, evlist->mmap_len);
			evlist->mmap[cpu].base = NULL;
		}
	}
}

int perf_evlist__alloc_mmap(struct perf_evlist *evlist)
{
	evlist->mmap = zalloc(evlist->cpus->nr * sizeof(struct perf_mmap));
	return evlist->mmap != NULL ? 0 : -ENOMEM;
}

static int __perf_evlist__mmap(struct perf_evlist *evlist, int cpu, int prot,
			       int mask, int fd)
{
	evlist->mmap[cpu].prev = 0;
	evlist->mmap[cpu].mask = mask;
	evlist->mmap[cpu].base = mmap(NULL, evlist->mmap_len, prot,
				      MAP_SHARED, fd, 0);
	if (evlist->mmap[cpu].base == MAP_FAILED)
		return -1;

	perf_evlist__add_pollfd(evlist, fd);
	return 0;
}

/** perf_evlist__mmap - Create per cpu maps to receive events
 *
 * @evlist - list of events
 * @pages - map length in pages
 * @overwrite - overwrite older events?
 *
 * If overwrite is false the user needs to signal event consuption using:
 *
 *	struct perf_mmap *m = &evlist->mmap[cpu];
 *	unsigned int head = perf_mmap__read_head(m);
 *
 *	perf_mmap__write_tail(m, head)
 *
 * Using perf_evlist__read_on_cpu does this automatically.
 */
int perf_evlist__mmap(struct perf_evlist *evlist, int pages, bool overwrite)
{
	unsigned int page_size = sysconf(_SC_PAGE_SIZE);
	int mask = pages * page_size - 1, cpu;
	struct perf_evsel *first_evsel, *evsel;
	const struct cpu_map *cpus = evlist->cpus;
	const struct thread_map *threads = evlist->threads;
	int thread, prot = PROT_READ | (overwrite ? 0 : PROT_WRITE);

	if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0)
		return -ENOMEM;

	if (evlist->pollfd == NULL && perf_evlist__alloc_pollfd(evlist) < 0)
		return -ENOMEM;

	evlist->overwrite = overwrite;
	evlist->mmap_len = (pages + 1) * page_size;
	first_evsel = list_entry(evlist->entries.next, struct perf_evsel, node);

	list_for_each_entry(evsel, &evlist->entries, node) {
		if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
		    evsel->id == NULL &&
		    perf_evsel__alloc_id(evsel, cpus->nr, threads->nr) < 0)
			return -ENOMEM;

		for (cpu = 0; cpu < cpus->nr; cpu++) {
			for (thread = 0; thread < threads->nr; thread++) {
				int fd = FD(evsel, cpu, thread);

				if (evsel->idx || thread) {
					if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT,
						  FD(first_evsel, cpu, 0)) != 0)
						goto out_unmap;
				} else if (__perf_evlist__mmap(evlist, cpu, prot, mask, fd) < 0)
					goto out_unmap;

				if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
				    perf_evlist__id_hash(evlist, evsel, cpu, thread, fd) < 0)
					goto out_unmap;
			}
		}
	}

	return 0;

out_unmap:
	for (cpu = 0; cpu < cpus->nr; cpu++) {
		if (evlist->mmap[cpu].base != NULL) {
			munmap(evlist->mmap[cpu].base, evlist->mmap_len);
			evlist->mmap[cpu].base = NULL;
		}
	}
	return -1;
}

int perf_evlist__create_maps(struct perf_evlist *evlist, pid_t target_pid,
			     pid_t target_tid, const char *cpu_list)
{
	evlist->threads = thread_map__new(target_pid, target_tid);

	if (evlist->threads == NULL)
		return -1;

	if (target_tid != -1)
		evlist->cpus = cpu_map__dummy_new();
	else
		evlist->cpus = cpu_map__new(cpu_list);

	if (evlist->cpus == NULL)
		goto out_delete_threads;

	return 0;

out_delete_threads:
	thread_map__delete(evlist->threads);
	return -1;
}

void perf_evlist__delete_maps(struct perf_evlist *evlist)
{
	cpu_map__delete(evlist->cpus);
	thread_map__delete(evlist->threads);
	evlist->cpus	= NULL;
	evlist->threads = NULL;
}
Commit	Line	Data
f8a95309 ACM	1	/*
	2	* Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
	3	*
	4	* Parts came from builtin-{top,stat,record}.c, see those files for further
	5	* copyright notes.
	6	*
	7	* Released under the GPL v2. (and only v2, not any later version)
	8	*/
5c581041	9	#include <poll.h>
f8a95309 ACM	10	#include "cpumap.h"
f8a95309 ACM	11	#include "thread_map.h"
361c99a6 ACM	12	#include "evlist.h"
	13	#include "evsel.h"
	14	#include "util.h"
	15
f8a95309 ACM	16	#include <sys/mman.h>
f8a95309 ACM	17
70db7533 ACM	18	#include <linux/bitops.h>
	19	#include <linux/hash.h>
	20
f8a95309 ACM	21	#define FD(e, x, y) ((int )xyarray__entry(e->fd, x, y))
	22	#define SID(e, x, y) xyarray__entry(e->id, x, y)
	23
7e2ed097 ACM	24	void perf_evlist__init(struct perf_evlist evlist, struct cpu_map cpus,
7e2ed097 ACM	25	struct thread_map *threads)
ef1d1af2 ACM	26	{
	27	int i;
	28
	29	for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i)
	30	INIT_HLIST_HEAD(&evlist->heads[i]);
	31	INIT_LIST_HEAD(&evlist->entries);
7e2ed097	32	perf_evlist__set_maps(evlist, cpus, threads);
ef1d1af2 ACM	33	}
ef1d1af2 ACM	34
7e2ed097 ACM	35	struct perf_evlist perf_evlist__new(struct cpu_map cpus,
7e2ed097 ACM	36	struct thread_map *threads)
361c99a6 ACM	37	{
	38	struct perf_evlist evlist = zalloc(sizeof(evlist));
	39
ef1d1af2	40	if (evlist != NULL)
7e2ed097	41	perf_evlist__init(evlist, cpus, threads);
361c99a6 ACM	42
	43	return evlist;
	44	}
	45
	46	static void perf_evlist__purge(struct perf_evlist *evlist)
	47	{
	48	struct perf_evsel pos, n;
	49
	50	list_for_each_entry_safe(pos, n, &evlist->entries, node) {
	51	list_del_init(&pos->node);
	52	perf_evsel__delete(pos);
	53	}
	54
	55	evlist->nr_entries = 0;
	56	}
	57
ef1d1af2	58	void perf_evlist__exit(struct perf_evlist *evlist)
361c99a6	59	{
70db7533	60	free(evlist->mmap);
5c581041	61	free(evlist->pollfd);
ef1d1af2 ACM	62	evlist->mmap = NULL;
	63	evlist->pollfd = NULL;
	64	}
	65
	66	void perf_evlist__delete(struct perf_evlist *evlist)
	67	{
	68	perf_evlist__purge(evlist);
	69	perf_evlist__exit(evlist);
361c99a6 ACM	70	free(evlist);
	71	}
	72
	73	void perf_evlist__add(struct perf_evlist evlist, struct perf_evsel entry)
	74	{
	75	list_add_tail(&entry->node, &evlist->entries);
	76	++evlist->nr_entries;
	77	}
	78
	79	int perf_evlist__add_default(struct perf_evlist *evlist)
	80	{
	81	struct perf_event_attr attr = {
	82	.type = PERF_TYPE_HARDWARE,
	83	.config = PERF_COUNT_HW_CPU_CYCLES,
	84	};
	85	struct perf_evsel *evsel = perf_evsel__new(&attr, 0);
	86
	87	if (evsel == NULL)
	88	return -ENOMEM;
	89
	90	perf_evlist__add(evlist, evsel);
	91	return 0;
	92	}
5c581041	93
7e2ed097	94	int perf_evlist__alloc_pollfd(struct perf_evlist *evlist)
5c581041	95	{
7e2ed097	96	int nfds = evlist->cpus->nr * evlist->threads->nr * evlist->nr_entries;
5c581041 ACM	97	evlist->pollfd = malloc(sizeof(struct pollfd) * nfds);
	98	return evlist->pollfd != NULL ? 0 : -ENOMEM;
	99	}
70082dd9 ACM	100
	101	void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd)
	102	{
	103	fcntl(fd, F_SETFL, O_NONBLOCK);
	104	evlist->pollfd[evlist->nr_fds].fd = fd;
	105	evlist->pollfd[evlist->nr_fds].events = POLLIN;
	106	evlist->nr_fds++;
	107	}
70db7533	108
f8a95309 ACM	109	static int perf_evlist__id_hash(struct perf_evlist evlist, struct perf_evsel evsel,
	110	int cpu, int thread, int fd)
	111	{
	112	struct perf_sample_id *sid;
	113	u64 read_data[4] = { 0, };
	114	int hash, id_idx = 1; /* The first entry is the counter value */
	115
	116	if (!(evsel->attr.read_format & PERF_FORMAT_ID) \|\|
	117	read(fd, &read_data, sizeof(read_data)) == -1)
	118	return -1;
	119
	120	if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
	121	++id_idx;
	122	if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
	123	++id_idx;
	124
	125	sid = SID(evsel, cpu, thread);
	126	sid->id = read_data[id_idx];
	127	sid->evsel = evsel;
	128	hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS);
	129	hlist_add_head(&sid->node, &evlist->heads[hash]);
	130	return 0;
	131	}
	132
70db7533 ACM	133	struct perf_evsel perf_evlist__id2evsel(struct perf_evlist evlist, u64 id)
	134	{
	135	struct hlist_head *head;
	136	struct hlist_node *pos;
	137	struct perf_sample_id *sid;
	138	int hash;
	139
	140	if (evlist->nr_entries == 1)
	141	return list_entry(evlist->entries.next, struct perf_evsel, node);
	142
	143	hash = hash_64(id, PERF_EVLIST__HLIST_BITS);
	144	head = &evlist->heads[hash];
	145
	146	hlist_for_each_entry(sid, pos, head, node)
	147	if (sid->id == id)
	148	return sid->evsel;
	149	return NULL;
	150	}
04391deb	151
8115d60c	152	union perf_event perf_evlist__read_on_cpu(struct perf_evlist evlist, int cpu)
04391deb ACM	153	{
	154	/* XXX Move this to perf.c, making it generally available */
	155	unsigned int page_size = sysconf(_SC_PAGE_SIZE);
	156	struct perf_mmap *md = &evlist->mmap[cpu];
	157	unsigned int head = perf_mmap__read_head(md);
	158	unsigned int old = md->prev;
	159	unsigned char *data = md->base + page_size;
8115d60c	160	union perf_event *event = NULL;
04391deb	161
7bb41152	162	if (evlist->overwrite) {
04391deb	163	/*
7bb41152 ACM	164	* If we're further behind than half the buffer, there's a chance
	165	* the writer will bite our tail and mess up the samples under us.
	166	*
	167	* If we somehow ended up ahead of the head, we got messed up.
	168	*
	169	* In either case, truncate and restart at head.
04391deb	170	*/
7bb41152 ACM	171	int diff = head - old;
	172	if (diff > md->mask / 2 \|\| diff < 0) {
	173	fprintf(stderr, "WARNING: failed to keep up with mmap data.\n");
	174
	175	/*
	176	* head points to a known good entry, start there.
	177	*/
	178	old = head;
	179	}
04391deb ACM	180	}
	181
	182	if (old != head) {
	183	size_t size;
	184
8115d60c	185	event = (union perf_event *)&data[old & md->mask];
04391deb ACM	186	size = event->header.size;
	187
	188	/*
	189	* Event straddles the mmap boundary -- header should always
	190	* be inside due to u64 alignment of output.
	191	*/
	192	if ((old & md->mask) + size != ((old + size) & md->mask)) {
	193	unsigned int offset = old;
	194	unsigned int len = min(sizeof(*event), size), cpy;
	195	void *dst = &evlist->event_copy;
	196
	197	do {
	198	cpy = min(md->mask + 1 - (offset & md->mask), len);
	199	memcpy(dst, &data[offset & md->mask], cpy);
	200	offset += cpy;
	201	dst += cpy;
	202	len -= cpy;
	203	} while (len);
	204
	205	event = &evlist->event_copy;
	206	}
	207
	208	old += size;
	209	}
	210
	211	md->prev = old;
7bb41152 ACM	212
	213	if (!evlist->overwrite)
	214	perf_mmap__write_tail(md, old);
	215
04391deb ACM	216	return event;
04391deb ACM	217	}
f8a95309	218
7e2ed097	219	void perf_evlist__munmap(struct perf_evlist *evlist)
f8a95309 ACM	220	{
	221	int cpu;
	222
7e2ed097	223	for (cpu = 0; cpu < evlist->cpus->nr; cpu++) {
f8a95309 ACM	224	if (evlist->mmap[cpu].base != NULL) {
	225	munmap(evlist->mmap[cpu].base, evlist->mmap_len);
	226	evlist->mmap[cpu].base = NULL;
	227	}
	228	}
	229	}
	230
7e2ed097	231	int perf_evlist__alloc_mmap(struct perf_evlist *evlist)
f8a95309	232	{
7e2ed097	233	evlist->mmap = zalloc(evlist->cpus->nr * sizeof(struct perf_mmap));
f8a95309 ACM	234	return evlist->mmap != NULL ? 0 : -ENOMEM;
	235	}
	236
	237	static int __perf_evlist__mmap(struct perf_evlist *evlist, int cpu, int prot,
	238	int mask, int fd)
	239	{
	240	evlist->mmap[cpu].prev = 0;
	241	evlist->mmap[cpu].mask = mask;
	242	evlist->mmap[cpu].base = mmap(NULL, evlist->mmap_len, prot,
	243	MAP_SHARED, fd, 0);
	244	if (evlist->mmap[cpu].base == MAP_FAILED)
	245	return -1;
	246
	247	perf_evlist__add_pollfd(evlist, fd);
	248	return 0;
	249	}
	250
	251	/** perf_evlist__mmap - Create per cpu maps to receive events
	252	*
	253	* @evlist - list of events
f8a95309 ACM	254	* @pages - map length in pages
	255	* @overwrite - overwrite older events?
	256	*
	257	* If overwrite is false the user needs to signal event consuption using:
	258	*
	259	* struct perf_mmap *m = &evlist->mmap[cpu];
	260	* unsigned int head = perf_mmap__read_head(m);
	261	*
	262	* perf_mmap__write_tail(m, head)
7e2ed097 ACM	263	*
7e2ed097 ACM	264	* Using perf_evlist__read_on_cpu does this automatically.
f8a95309	265	*/
7e2ed097	266	int perf_evlist__mmap(struct perf_evlist *evlist, int pages, bool overwrite)
f8a95309 ACM	267	{
	268	unsigned int page_size = sysconf(_SC_PAGE_SIZE);
	269	int mask = pages * page_size - 1, cpu;
	270	struct perf_evsel first_evsel, evsel;
7e2ed097 ACM	271	const struct cpu_map *cpus = evlist->cpus;
7e2ed097 ACM	272	const struct thread_map *threads = evlist->threads;
f8a95309 ACM	273	int thread, prot = PROT_READ \| (overwrite ? 0 : PROT_WRITE);
f8a95309 ACM	274
7e2ed097	275	if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0)
f8a95309 ACM	276	return -ENOMEM;
f8a95309 ACM	277
7e2ed097	278	if (evlist->pollfd == NULL && perf_evlist__alloc_pollfd(evlist) < 0)
f8a95309 ACM	279	return -ENOMEM;
	280
	281	evlist->overwrite = overwrite;
	282	evlist->mmap_len = (pages + 1) * page_size;
	283	first_evsel = list_entry(evlist->entries.next, struct perf_evsel, node);
	284
	285	list_for_each_entry(evsel, &evlist->entries, node) {
	286	if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
	287	evsel->id == NULL &&
	288	perf_evsel__alloc_id(evsel, cpus->nr, threads->nr) < 0)
	289	return -ENOMEM;
	290
	291	for (cpu = 0; cpu < cpus->nr; cpu++) {
	292	for (thread = 0; thread < threads->nr; thread++) {
	293	int fd = FD(evsel, cpu, thread);
	294
	295	if (evsel->idx \|\| thread) {
	296	if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT,
	297	FD(first_evsel, cpu, 0)) != 0)
	298	goto out_unmap;
	299	} else if (__perf_evlist__mmap(evlist, cpu, prot, mask, fd) < 0)
	300	goto out_unmap;
	301
	302	if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
	303	perf_evlist__id_hash(evlist, evsel, cpu, thread, fd) < 0)
	304	goto out_unmap;
	305	}
	306	}
	307	}
	308
	309	return 0;
	310
	311	out_unmap:
	312	for (cpu = 0; cpu < cpus->nr; cpu++) {
	313	if (evlist->mmap[cpu].base != NULL) {
	314	munmap(evlist->mmap[cpu].base, evlist->mmap_len);
	315	evlist->mmap[cpu].base = NULL;
	316	}
	317	}
	318	return -1;
	319	}
7e2ed097 ACM	320
	321	int perf_evlist__create_maps(struct perf_evlist *evlist, pid_t target_pid,
	322	pid_t target_tid, const char *cpu_list)
	323	{
	324	evlist->threads = thread_map__new(target_pid, target_tid);
	325
	326	if (evlist->threads == NULL)
	327	return -1;
	328
	329	if (target_tid != -1)
	330	evlist->cpus = cpu_map__dummy_new();
	331	else
	332	evlist->cpus = cpu_map__new(cpu_list);
	333
	334	if (evlist->cpus == NULL)
	335	goto out_delete_threads;
	336
	337	return 0;
	338
	339	out_delete_threads:
	340	thread_map__delete(evlist->threads);
	341	return -1;
	342	}
	343
	344	void perf_evlist__delete_maps(struct perf_evlist *evlist)
	345	{
	346	cpu_map__delete(evlist->cpus);
	347	thread_map__delete(evlist->threads);
	348	evlist->cpus = NULL;
	349	evlist->threads = NULL;
	350	}