evlist.c (3d3b5e95997208067c963923db90ed1517565d14) evlist.c (a91e5431d54f5359fccb5ec2512f252eb217707e)
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 */

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14#include "util.h"
15
16#include <sys/mman.h>
17
18#include <linux/bitops.h>
19#include <linux/hash.h>
20
21#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
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 */

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14#include "util.h"
15
16#include <sys/mman.h>
17
18#include <linux/bitops.h>
19#include <linux/hash.h>
20
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)
22#define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
23
24void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus,
25 struct thread_map *threads)
26{
27 int i;
28
29 for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i)
30 INIT_HLIST_HEAD(&evlist->heads[i]);

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101void 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}
108
23
24void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus,
25 struct thread_map *threads)
26{
27 int i;
28
29 for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i)
30 INIT_HLIST_HEAD(&evlist->heads[i]);

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101void 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}
108
109void perf_evlist__id_hash(struct perf_evlist *evlist, struct perf_evsel *evsel,
110 int cpu, int thread, u64 id)
109static void perf_evlist__id_hash(struct perf_evlist *evlist,
110 struct perf_evsel *evsel,
111 int cpu, int thread, u64 id)
111{
112 int hash;
113 struct perf_sample_id *sid = SID(evsel, cpu, thread);
114
115 sid->id = id;
116 sid->evsel = evsel;
117 hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS);
118 hlist_add_head(&sid->node, &evlist->heads[hash]);
119}
120
112{
113 int hash;
114 struct perf_sample_id *sid = SID(evsel, cpu, thread);
115
116 sid->id = id;
117 sid->evsel = evsel;
118 hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS);
119 hlist_add_head(&sid->node, &evlist->heads[hash]);
120}
121
121static int perf_evlist__id_hash_fd(struct perf_evlist *evlist,
122 struct perf_evsel *evsel,
123 int cpu, int thread, int fd)
122void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel,
123 int cpu, int thread, u64 id)
124{
124{
125 perf_evlist__id_hash(evlist, evsel, cpu, thread, id);
126 evsel->id[evsel->ids++] = id;
127}
128
129static int perf_evlist__id_add_fd(struct perf_evlist *evlist,
130 struct perf_evsel *evsel,
131 int cpu, int thread, int fd)
132{
125 u64 read_data[4] = { 0, };
126 int id_idx = 1; /* The first entry is the counter value */
127
128 if (!(evsel->attr.read_format & PERF_FORMAT_ID) ||
129 read(fd, &read_data, sizeof(read_data)) == -1)
130 return -1;
131
132 if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
133 ++id_idx;
134 if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
135 ++id_idx;
136
133 u64 read_data[4] = { 0, };
134 int id_idx = 1; /* The first entry is the counter value */
135
136 if (!(evsel->attr.read_format & PERF_FORMAT_ID) ||
137 read(fd, &read_data, sizeof(read_data)) == -1)
138 return -1;
139
140 if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
141 ++id_idx;
142 if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
143 ++id_idx;
144
137 perf_evlist__id_hash(evlist, evsel, cpu, thread, read_data[id_idx]);
145 perf_evlist__id_add(evlist, evsel, cpu, thread, read_data[id_idx]);
138 return 0;
139}
140
141struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)
142{
143 struct hlist_head *head;
144 struct hlist_node *pos;
145 struct perf_sample_id *sid;

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287 return -ENOMEM;
288
289 evlist->overwrite = overwrite;
290 evlist->mmap_len = (pages + 1) * page_size;
291 first_evsel = list_entry(evlist->entries.next, struct perf_evsel, node);
292
293 list_for_each_entry(evsel, &evlist->entries, node) {
294 if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
146 return 0;
147}
148
149struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)
150{
151 struct hlist_head *head;
152 struct hlist_node *pos;
153 struct perf_sample_id *sid;

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295 return -ENOMEM;
296
297 evlist->overwrite = overwrite;
298 evlist->mmap_len = (pages + 1) * page_size;
299 first_evsel = list_entry(evlist->entries.next, struct perf_evsel, node);
300
301 list_for_each_entry(evsel, &evlist->entries, node) {
302 if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
295 evsel->id == NULL &&
303 evsel->sample_id == NULL &&
296 perf_evsel__alloc_id(evsel, cpus->nr, threads->nr) < 0)
297 return -ENOMEM;
298
299 for (cpu = 0; cpu < cpus->nr; cpu++) {
300 for (thread = 0; thread < threads->nr; thread++) {
301 int fd = FD(evsel, cpu, thread);
302
303 if (evsel->idx || thread) {
304 if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT,
305 FD(first_evsel, cpu, 0)) != 0)
306 goto out_unmap;
307 } else if (__perf_evlist__mmap(evlist, cpu, prot, mask, fd) < 0)
308 goto out_unmap;
309
310 if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
304 perf_evsel__alloc_id(evsel, cpus->nr, threads->nr) < 0)
305 return -ENOMEM;
306
307 for (cpu = 0; cpu < cpus->nr; cpu++) {
308 for (thread = 0; thread < threads->nr; thread++) {
309 int fd = FD(evsel, cpu, thread);
310
311 if (evsel->idx || thread) {
312 if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT,
313 FD(first_evsel, cpu, 0)) != 0)
314 goto out_unmap;
315 } else if (__perf_evlist__mmap(evlist, cpu, prot, mask, fd) < 0)
316 goto out_unmap;
317
318 if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
311 perf_evlist__id_hash_fd(evlist, evsel, cpu, thread, fd) < 0)
319 perf_evlist__id_add_fd(evlist, evsel, cpu, thread, fd) < 0)
312 goto out_unmap;
313 }
314 }
315 }
316
317 return 0;
318
319out_unmap:

--- 67 unchanged lines hidden --- 		320 goto out_unmap;
321 }
322 }
323 }
324
325 return 0;
326
327out_unmap:

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