tools/perf/util/evlist.c - kernel/msm-4.9 - Gitiles

 /*
  * 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->sample_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 void perf_evlist__id_hash(struct perf_evlist *evlist,
 				 struct perf_evsel *evsel,
 				 int cpu, int thread, u64 id)
 {
 	int hash;
 	struct perf_sample_id *sid = SID(evsel, cpu, thread);

 	sid->id = id;
 	sid->evsel = evsel;
 	hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS);
 	hlist_add_head(&sid->node, &evlist->heads[hash]);
 }

 void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel,
 			 int cpu, int thread, u64 id)
 {
 	perf_evlist__id_hash(evlist, evsel, cpu, thread, id);
 	evsel->id[evsel->ids++] = id;
 }

 static int perf_evlist__id_add_fd(struct perf_evlist *evlist,
 				  struct perf_evsel *evsel,
 				  int cpu, int thread, int fd)
 {
 	u64 read_data[4] = { 0, };
 	int 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;

 	perf_evlist__id_add(evlist, evsel, cpu, thread, read_data[id_idx]);
 	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->sample_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_add_fd(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;
 }

 int perf_evlist__set_filters(struct perf_evlist *evlist)
 {
 	const struct thread_map *threads = evlist->threads;
 	const struct cpu_map *cpus = evlist->cpus;
 	struct perf_evsel *evsel;
 	char *filter;
 	int thread;
 	int cpu;
 	int err;
 	int fd;

 	list_for_each_entry(evsel, &evlist->entries, node) {
 		filter = evsel->filter;
 		if (!filter)
 			continue;
 		for (cpu = 0; cpu < cpus->nr; cpu++) {
 			for (thread = 0; thread < threads->nr; thread++) {
 				fd = FD(evsel, cpu, thread);
 				err = ioctl(fd, PERF_EVENT_IOC_SET_FILTER, filter);
 				if (err)
 					return err;
 			}
 		}
 	}

 	return 0;
 }
	/*
	* 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->sample_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 void perf_evlist__id_hash(struct perf_evlist *evlist,
	struct perf_evsel *evsel,
	int cpu, int thread, u64 id)
	{
	int hash;
	struct perf_sample_id *sid = SID(evsel, cpu, thread);

	sid->id = id;
	sid->evsel = evsel;
	hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS);
	hlist_add_head(&sid->node, &evlist->heads[hash]);
	}

	void perf_evlist__id_add(struct perf_evlist evlist, struct perf_evsel evsel,
	int cpu, int thread, u64 id)
	{
	perf_evlist__id_hash(evlist, evsel, cpu, thread, id);
	evsel->id[evsel->ids++] = id;
	}

	static int perf_evlist__id_add_fd(struct perf_evlist *evlist,
	struct perf_evsel *evsel,
	int cpu, int thread, int fd)
	{
	u64 read_data[4] = { 0, };
	int 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;

	perf_evlist__id_add(evlist, evsel, cpu, thread, read_data[id_idx]);
	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->sample_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_add_fd(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;
	}

	int perf_evlist__set_filters(struct perf_evlist *evlist)
	{
	const struct thread_map *threads = evlist->threads;
	const struct cpu_map *cpus = evlist->cpus;
	struct perf_evsel *evsel;
	char *filter;
	int thread;
	int cpu;
	int err;
	int fd;

	list_for_each_entry(evsel, &evlist->entries, node) {
	filter = evsel->filter;
	if (!filter)
	continue;
	for (cpu = 0; cpu < cpus->nr; cpu++) {
	for (thread = 0; thread < threads->nr; thread++) {
	fd = FD(evsel, cpu, thread);
	err = ioctl(fd, PERF_EVENT_IOC_SET_FILTER, filter);
	if (err)
	return err;
	}
	}
	}

	return 0;
	}