1799 lines
40 KiB
C
1799 lines
40 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Parts came from builtin-{top,stat,record}.c, see those files for further
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* copyright notes.
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*/
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#include <api/fs/fs.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <poll.h>
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#include "cpumap.h"
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#include "util/mmap.h"
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#include "thread_map.h"
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#include "target.h"
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#include "evlist.h"
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#include "evsel.h"
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#include "debug.h"
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#include "units.h"
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#include <internal/lib.h> // page_size
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#include "../perf.h"
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#include "asm/bug.h"
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#include "bpf-event.h"
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#include <signal.h>
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#include <unistd.h>
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#include <sched.h>
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#include <stdlib.h>
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#include "parse-events.h"
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#include <subcmd/parse-options.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <linux/bitops.h>
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#include <linux/hash.h>
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#include <linux/log2.h>
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#include <linux/err.h>
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#include <linux/string.h>
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#include <linux/zalloc.h>
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#include <perf/evlist.h>
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#include <perf/evsel.h>
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#include <perf/cpumap.h>
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#include <internal/xyarray.h>
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#ifdef LACKS_SIGQUEUE_PROTOTYPE
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int sigqueue(pid_t pid, int sig, const union sigval value);
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#endif
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#define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y))
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#define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y)
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void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus,
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struct perf_thread_map *threads)
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{
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perf_evlist__init(&evlist->core);
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perf_evlist__set_maps(&evlist->core, cpus, threads);
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fdarray__init(&evlist->core.pollfd, 64);
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evlist->workload.pid = -1;
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evlist->bkw_mmap_state = BKW_MMAP_NOTREADY;
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}
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struct evlist *evlist__new(void)
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{
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struct evlist *evlist = zalloc(sizeof(*evlist));
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if (evlist != NULL)
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evlist__init(evlist, NULL, NULL);
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return evlist;
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}
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struct evlist *perf_evlist__new_default(void)
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{
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struct evlist *evlist = evlist__new();
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if (evlist && perf_evlist__add_default(evlist)) {
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evlist__delete(evlist);
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evlist = NULL;
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}
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return evlist;
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}
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struct evlist *perf_evlist__new_dummy(void)
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{
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struct evlist *evlist = evlist__new();
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if (evlist && perf_evlist__add_dummy(evlist)) {
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evlist__delete(evlist);
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evlist = NULL;
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}
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return evlist;
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}
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/**
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* perf_evlist__set_id_pos - set the positions of event ids.
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* @evlist: selected event list
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*
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* Events with compatible sample types all have the same id_pos
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* and is_pos. For convenience, put a copy on evlist.
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*/
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void perf_evlist__set_id_pos(struct evlist *evlist)
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{
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struct evsel *first = evlist__first(evlist);
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evlist->id_pos = first->id_pos;
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evlist->is_pos = first->is_pos;
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}
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static void perf_evlist__update_id_pos(struct evlist *evlist)
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{
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struct evsel *evsel;
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evlist__for_each_entry(evlist, evsel)
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perf_evsel__calc_id_pos(evsel);
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perf_evlist__set_id_pos(evlist);
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}
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static void evlist__purge(struct evlist *evlist)
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{
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struct evsel *pos, *n;
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evlist__for_each_entry_safe(evlist, n, pos) {
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list_del_init(&pos->core.node);
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pos->evlist = NULL;
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evsel__delete(pos);
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}
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evlist->core.nr_entries = 0;
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}
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void evlist__exit(struct evlist *evlist)
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{
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zfree(&evlist->mmap);
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zfree(&evlist->overwrite_mmap);
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fdarray__exit(&evlist->core.pollfd);
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}
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void evlist__delete(struct evlist *evlist)
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{
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if (evlist == NULL)
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return;
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evlist__munmap(evlist);
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evlist__close(evlist);
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perf_cpu_map__put(evlist->core.cpus);
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perf_thread_map__put(evlist->core.threads);
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evlist->core.cpus = NULL;
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evlist->core.threads = NULL;
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evlist__purge(evlist);
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evlist__exit(evlist);
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free(evlist);
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}
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void evlist__add(struct evlist *evlist, struct evsel *entry)
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{
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entry->evlist = evlist;
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entry->idx = evlist->core.nr_entries;
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entry->tracking = !entry->idx;
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perf_evlist__add(&evlist->core, &entry->core);
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if (evlist->core.nr_entries == 1)
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perf_evlist__set_id_pos(evlist);
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}
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void evlist__remove(struct evlist *evlist, struct evsel *evsel)
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{
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evsel->evlist = NULL;
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perf_evlist__remove(&evlist->core, &evsel->core);
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}
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void perf_evlist__splice_list_tail(struct evlist *evlist,
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struct list_head *list)
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{
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struct evsel *evsel, *temp;
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__evlist__for_each_entry_safe(list, temp, evsel) {
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list_del_init(&evsel->core.node);
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evlist__add(evlist, evsel);
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}
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}
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void __perf_evlist__set_leader(struct list_head *list)
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{
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struct evsel *evsel, *leader;
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leader = list_entry(list->next, struct evsel, core.node);
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evsel = list_entry(list->prev, struct evsel, core.node);
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leader->core.nr_members = evsel->idx - leader->idx + 1;
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__evlist__for_each_entry(list, evsel) {
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evsel->leader = leader;
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}
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}
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void perf_evlist__set_leader(struct evlist *evlist)
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{
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if (evlist->core.nr_entries) {
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evlist->nr_groups = evlist->core.nr_entries > 1 ? 1 : 0;
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__perf_evlist__set_leader(&evlist->core.entries);
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}
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}
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int __perf_evlist__add_default(struct evlist *evlist, bool precise)
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{
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struct evsel *evsel = perf_evsel__new_cycles(precise);
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if (evsel == NULL)
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return -ENOMEM;
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evlist__add(evlist, evsel);
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return 0;
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}
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int perf_evlist__add_dummy(struct evlist *evlist)
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{
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struct perf_event_attr attr = {
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.type = PERF_TYPE_SOFTWARE,
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.config = PERF_COUNT_SW_DUMMY,
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.size = sizeof(attr), /* to capture ABI version */
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};
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struct evsel *evsel = perf_evsel__new_idx(&attr, evlist->core.nr_entries);
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if (evsel == NULL)
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return -ENOMEM;
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evlist__add(evlist, evsel);
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return 0;
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}
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static int evlist__add_attrs(struct evlist *evlist,
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struct perf_event_attr *attrs, size_t nr_attrs)
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{
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struct evsel *evsel, *n;
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LIST_HEAD(head);
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size_t i;
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for (i = 0; i < nr_attrs; i++) {
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evsel = perf_evsel__new_idx(attrs + i, evlist->core.nr_entries + i);
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if (evsel == NULL)
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goto out_delete_partial_list;
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list_add_tail(&evsel->core.node, &head);
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}
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perf_evlist__splice_list_tail(evlist, &head);
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return 0;
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out_delete_partial_list:
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__evlist__for_each_entry_safe(&head, n, evsel)
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evsel__delete(evsel);
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return -1;
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}
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int __perf_evlist__add_default_attrs(struct evlist *evlist,
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struct perf_event_attr *attrs, size_t nr_attrs)
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{
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size_t i;
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for (i = 0; i < nr_attrs; i++)
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event_attr_init(attrs + i);
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return evlist__add_attrs(evlist, attrs, nr_attrs);
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}
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struct evsel *
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perf_evlist__find_tracepoint_by_id(struct evlist *evlist, int id)
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{
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struct evsel *evsel;
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evlist__for_each_entry(evlist, evsel) {
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if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
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(int)evsel->core.attr.config == id)
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return evsel;
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}
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return NULL;
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}
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struct evsel *
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perf_evlist__find_tracepoint_by_name(struct evlist *evlist,
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const char *name)
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{
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struct evsel *evsel;
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evlist__for_each_entry(evlist, evsel) {
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if ((evsel->core.attr.type == PERF_TYPE_TRACEPOINT) &&
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(strcmp(evsel->name, name) == 0))
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return evsel;
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}
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return NULL;
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}
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int perf_evlist__add_newtp(struct evlist *evlist,
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const char *sys, const char *name, void *handler)
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{
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struct evsel *evsel = perf_evsel__newtp(sys, name);
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if (IS_ERR(evsel))
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return -1;
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evsel->handler = handler;
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evlist__add(evlist, evsel);
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return 0;
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}
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static int perf_evlist__nr_threads(struct evlist *evlist,
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struct evsel *evsel)
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{
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if (evsel->core.system_wide)
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return 1;
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else
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return perf_thread_map__nr(evlist->core.threads);
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}
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void evlist__disable(struct evlist *evlist)
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{
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struct evsel *pos;
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evlist__for_each_entry(evlist, pos) {
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if (pos->disabled || !perf_evsel__is_group_leader(pos) || !pos->core.fd)
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continue;
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evsel__disable(pos);
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}
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evlist->enabled = false;
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}
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void evlist__enable(struct evlist *evlist)
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{
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struct evsel *pos;
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evlist__for_each_entry(evlist, pos) {
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if (!perf_evsel__is_group_leader(pos) || !pos->core.fd)
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continue;
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evsel__enable(pos);
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}
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evlist->enabled = true;
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}
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void perf_evlist__toggle_enable(struct evlist *evlist)
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{
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(evlist->enabled ? evlist__disable : evlist__enable)(evlist);
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}
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static int perf_evlist__enable_event_cpu(struct evlist *evlist,
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struct evsel *evsel, int cpu)
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{
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int thread;
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int nr_threads = perf_evlist__nr_threads(evlist, evsel);
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if (!evsel->core.fd)
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return -EINVAL;
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for (thread = 0; thread < nr_threads; thread++) {
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int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0);
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if (err)
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return err;
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}
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return 0;
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}
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static int perf_evlist__enable_event_thread(struct evlist *evlist,
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struct evsel *evsel,
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int thread)
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{
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int cpu;
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int nr_cpus = perf_cpu_map__nr(evlist->core.cpus);
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if (!evsel->core.fd)
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return -EINVAL;
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for (cpu = 0; cpu < nr_cpus; cpu++) {
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int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0);
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if (err)
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return err;
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}
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return 0;
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}
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int perf_evlist__enable_event_idx(struct evlist *evlist,
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struct evsel *evsel, int idx)
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{
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bool per_cpu_mmaps = !perf_cpu_map__empty(evlist->core.cpus);
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if (per_cpu_mmaps)
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return perf_evlist__enable_event_cpu(evlist, evsel, idx);
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else
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return perf_evlist__enable_event_thread(evlist, evsel, idx);
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}
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int evlist__add_pollfd(struct evlist *evlist, int fd)
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{
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return perf_evlist__add_pollfd(&evlist->core, fd, NULL, POLLIN);
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}
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static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd,
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void *arg __maybe_unused)
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{
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struct mmap *map = fda->priv[fd].ptr;
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if (map)
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perf_mmap__put(map);
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}
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int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask)
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{
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return fdarray__filter(&evlist->core.pollfd, revents_and_mask,
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perf_evlist__munmap_filtered, NULL);
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}
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int evlist__poll(struct evlist *evlist, int timeout)
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{
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return perf_evlist__poll(&evlist->core, timeout);
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}
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static void perf_evlist__set_sid_idx(struct evlist *evlist,
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struct evsel *evsel, int idx, int cpu,
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int thread)
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{
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struct perf_sample_id *sid = SID(evsel, cpu, thread);
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sid->idx = idx;
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if (evlist->core.cpus && cpu >= 0)
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sid->cpu = evlist->core.cpus->map[cpu];
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else
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sid->cpu = -1;
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if (!evsel->core.system_wide && evlist->core.threads && thread >= 0)
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sid->tid = perf_thread_map__pid(evlist->core.threads, thread);
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else
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sid->tid = -1;
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}
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struct perf_sample_id *perf_evlist__id2sid(struct evlist *evlist, u64 id)
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{
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struct hlist_head *head;
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struct perf_sample_id *sid;
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int hash;
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hash = hash_64(id, PERF_EVLIST__HLIST_BITS);
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head = &evlist->core.heads[hash];
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hlist_for_each_entry(sid, head, node)
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if (sid->id == id)
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return sid;
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return NULL;
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}
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struct evsel *perf_evlist__id2evsel(struct evlist *evlist, u64 id)
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{
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struct perf_sample_id *sid;
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if (evlist->core.nr_entries == 1 || !id)
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return evlist__first(evlist);
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sid = perf_evlist__id2sid(evlist, id);
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if (sid)
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return container_of(sid->evsel, struct evsel, core);
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if (!perf_evlist__sample_id_all(evlist))
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return evlist__first(evlist);
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return NULL;
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}
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struct evsel *perf_evlist__id2evsel_strict(struct evlist *evlist,
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u64 id)
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{
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struct perf_sample_id *sid;
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if (!id)
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return NULL;
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sid = perf_evlist__id2sid(evlist, id);
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if (sid)
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return container_of(sid->evsel, struct evsel, core);
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return NULL;
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}
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static int perf_evlist__event2id(struct evlist *evlist,
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union perf_event *event, u64 *id)
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{
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const __u64 *array = event->sample.array;
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ssize_t n;
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n = (event->header.size - sizeof(event->header)) >> 3;
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if (event->header.type == PERF_RECORD_SAMPLE) {
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if (evlist->id_pos >= n)
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return -1;
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*id = array[evlist->id_pos];
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} else {
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if (evlist->is_pos > n)
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return -1;
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n -= evlist->is_pos;
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*id = array[n];
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}
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return 0;
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}
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struct evsel *perf_evlist__event2evsel(struct evlist *evlist,
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union perf_event *event)
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{
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struct evsel *first = evlist__first(evlist);
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struct hlist_head *head;
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struct perf_sample_id *sid;
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int hash;
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u64 id;
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if (evlist->core.nr_entries == 1)
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return first;
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if (!first->core.attr.sample_id_all &&
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event->header.type != PERF_RECORD_SAMPLE)
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return first;
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if (perf_evlist__event2id(evlist, event, &id))
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return NULL;
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/* Synthesized events have an id of zero */
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if (!id)
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return first;
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hash = hash_64(id, PERF_EVLIST__HLIST_BITS);
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head = &evlist->core.heads[hash];
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hlist_for_each_entry(sid, head, node) {
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if (sid->id == id)
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return container_of(sid->evsel, struct evsel, core);
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}
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return NULL;
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}
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|
|
static int perf_evlist__set_paused(struct evlist *evlist, bool value)
|
|
{
|
|
int i;
|
|
|
|
if (!evlist->overwrite_mmap)
|
|
return 0;
|
|
|
|
for (i = 0; i < evlist->core.nr_mmaps; i++) {
|
|
int fd = evlist->overwrite_mmap[i].core.fd;
|
|
int err;
|
|
|
|
if (fd < 0)
|
|
continue;
|
|
err = ioctl(fd, PERF_EVENT_IOC_PAUSE_OUTPUT, value ? 1 : 0);
|
|
if (err)
|
|
return err;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int perf_evlist__pause(struct evlist *evlist)
|
|
{
|
|
return perf_evlist__set_paused(evlist, true);
|
|
}
|
|
|
|
static int perf_evlist__resume(struct evlist *evlist)
|
|
{
|
|
return perf_evlist__set_paused(evlist, false);
|
|
}
|
|
|
|
static void evlist__munmap_nofree(struct evlist *evlist)
|
|
{
|
|
int i;
|
|
|
|
if (evlist->mmap)
|
|
for (i = 0; i < evlist->core.nr_mmaps; i++)
|
|
perf_mmap__munmap(&evlist->mmap[i]);
|
|
|
|
if (evlist->overwrite_mmap)
|
|
for (i = 0; i < evlist->core.nr_mmaps; i++)
|
|
perf_mmap__munmap(&evlist->overwrite_mmap[i]);
|
|
}
|
|
|
|
void evlist__munmap(struct evlist *evlist)
|
|
{
|
|
evlist__munmap_nofree(evlist);
|
|
zfree(&evlist->mmap);
|
|
zfree(&evlist->overwrite_mmap);
|
|
}
|
|
|
|
static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
|
|
bool overwrite)
|
|
{
|
|
int i;
|
|
struct mmap *map;
|
|
|
|
evlist->core.nr_mmaps = perf_cpu_map__nr(evlist->core.cpus);
|
|
if (perf_cpu_map__empty(evlist->core.cpus))
|
|
evlist->core.nr_mmaps = perf_thread_map__nr(evlist->core.threads);
|
|
map = zalloc(evlist->core.nr_mmaps * sizeof(struct mmap));
|
|
if (!map)
|
|
return NULL;
|
|
|
|
for (i = 0; i < evlist->core.nr_mmaps; i++) {
|
|
map[i].core.fd = -1;
|
|
map[i].core.overwrite = overwrite;
|
|
/*
|
|
* When the perf_mmap() call is made we grab one refcount, plus
|
|
* one extra to let perf_mmap__consume() get the last
|
|
* events after all real references (perf_mmap__get()) are
|
|
* dropped.
|
|
*
|
|
* Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and
|
|
* thus does perf_mmap__get() on it.
|
|
*/
|
|
refcount_set(&map[i].core.refcnt, 0);
|
|
}
|
|
return map;
|
|
}
|
|
|
|
static bool
|
|
perf_evlist__should_poll(struct evlist *evlist __maybe_unused,
|
|
struct evsel *evsel)
|
|
{
|
|
if (evsel->core.attr.write_backward)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
|
|
struct mmap_params *mp, int cpu_idx,
|
|
int thread, int *_output, int *_output_overwrite)
|
|
{
|
|
struct evsel *evsel;
|
|
int revent;
|
|
int evlist_cpu = cpu_map__cpu(evlist->core.cpus, cpu_idx);
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
struct mmap *maps = evlist->mmap;
|
|
int *output = _output;
|
|
int fd;
|
|
int cpu;
|
|
|
|
mp->prot = PROT_READ | PROT_WRITE;
|
|
if (evsel->core.attr.write_backward) {
|
|
output = _output_overwrite;
|
|
maps = evlist->overwrite_mmap;
|
|
|
|
if (!maps) {
|
|
maps = evlist__alloc_mmap(evlist, true);
|
|
if (!maps)
|
|
return -1;
|
|
evlist->overwrite_mmap = maps;
|
|
if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY)
|
|
perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
|
|
}
|
|
mp->prot &= ~PROT_WRITE;
|
|
}
|
|
|
|
if (evsel->core.system_wide && thread)
|
|
continue;
|
|
|
|
cpu = perf_cpu_map__idx(evsel->core.cpus, evlist_cpu);
|
|
if (cpu == -1)
|
|
continue;
|
|
|
|
fd = FD(evsel, cpu, thread);
|
|
|
|
if (*output == -1) {
|
|
*output = fd;
|
|
|
|
if (perf_mmap__mmap(&maps[idx], mp, *output, evlist_cpu) < 0)
|
|
return -1;
|
|
} else {
|
|
if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0)
|
|
return -1;
|
|
|
|
perf_mmap__get(&maps[idx]);
|
|
}
|
|
|
|
revent = perf_evlist__should_poll(evlist, evsel) ? POLLIN : 0;
|
|
|
|
/*
|
|
* The system_wide flag causes a selected event to be opened
|
|
* always without a pid. Consequently it will never get a
|
|
* POLLHUP, but it is used for tracking in combination with
|
|
* other events, so it should not need to be polled anyway.
|
|
* Therefore don't add it for polling.
|
|
*/
|
|
if (!evsel->core.system_wide &&
|
|
perf_evlist__add_pollfd(&evlist->core, fd, &maps[idx], revent) < 0) {
|
|
perf_mmap__put(&maps[idx]);
|
|
return -1;
|
|
}
|
|
|
|
if (evsel->core.attr.read_format & PERF_FORMAT_ID) {
|
|
if (perf_evlist__id_add_fd(&evlist->core, &evsel->core, cpu, thread,
|
|
fd) < 0)
|
|
return -1;
|
|
perf_evlist__set_sid_idx(evlist, evsel, idx, cpu,
|
|
thread);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int evlist__mmap_per_cpu(struct evlist *evlist,
|
|
struct mmap_params *mp)
|
|
{
|
|
int cpu, thread;
|
|
int nr_cpus = perf_cpu_map__nr(evlist->core.cpus);
|
|
int nr_threads = perf_thread_map__nr(evlist->core.threads);
|
|
|
|
pr_debug2("perf event ring buffer mmapped per cpu\n");
|
|
for (cpu = 0; cpu < nr_cpus; cpu++) {
|
|
int output = -1;
|
|
int output_overwrite = -1;
|
|
|
|
auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu,
|
|
true);
|
|
|
|
for (thread = 0; thread < nr_threads; thread++) {
|
|
if (evlist__mmap_per_evsel(evlist, cpu, mp, cpu,
|
|
thread, &output, &output_overwrite))
|
|
goto out_unmap;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_unmap:
|
|
evlist__munmap_nofree(evlist);
|
|
return -1;
|
|
}
|
|
|
|
static int evlist__mmap_per_thread(struct evlist *evlist,
|
|
struct mmap_params *mp)
|
|
{
|
|
int thread;
|
|
int nr_threads = perf_thread_map__nr(evlist->core.threads);
|
|
|
|
pr_debug2("perf event ring buffer mmapped per thread\n");
|
|
for (thread = 0; thread < nr_threads; thread++) {
|
|
int output = -1;
|
|
int output_overwrite = -1;
|
|
|
|
auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread,
|
|
false);
|
|
|
|
if (evlist__mmap_per_evsel(evlist, thread, mp, 0, thread,
|
|
&output, &output_overwrite))
|
|
goto out_unmap;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_unmap:
|
|
evlist__munmap_nofree(evlist);
|
|
return -1;
|
|
}
|
|
|
|
unsigned long perf_event_mlock_kb_in_pages(void)
|
|
{
|
|
unsigned long pages;
|
|
int max;
|
|
|
|
if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) {
|
|
/*
|
|
* Pick a once upon a time good value, i.e. things look
|
|
* strange since we can't read a sysctl value, but lets not
|
|
* die yet...
|
|
*/
|
|
max = 512;
|
|
} else {
|
|
max -= (page_size / 1024);
|
|
}
|
|
|
|
pages = (max * 1024) / page_size;
|
|
if (!is_power_of_2(pages))
|
|
pages = rounddown_pow_of_two(pages);
|
|
|
|
return pages;
|
|
}
|
|
|
|
size_t evlist__mmap_size(unsigned long pages)
|
|
{
|
|
if (pages == UINT_MAX)
|
|
pages = perf_event_mlock_kb_in_pages();
|
|
else if (!is_power_of_2(pages))
|
|
return 0;
|
|
|
|
return (pages + 1) * page_size;
|
|
}
|
|
|
|
static long parse_pages_arg(const char *str, unsigned long min,
|
|
unsigned long max)
|
|
{
|
|
unsigned long pages, val;
|
|
static struct parse_tag tags[] = {
|
|
{ .tag = 'B', .mult = 1 },
|
|
{ .tag = 'K', .mult = 1 << 10 },
|
|
{ .tag = 'M', .mult = 1 << 20 },
|
|
{ .tag = 'G', .mult = 1 << 30 },
|
|
{ .tag = 0 },
|
|
};
|
|
|
|
if (str == NULL)
|
|
return -EINVAL;
|
|
|
|
val = parse_tag_value(str, tags);
|
|
if (val != (unsigned long) -1) {
|
|
/* we got file size value */
|
|
pages = PERF_ALIGN(val, page_size) / page_size;
|
|
} else {
|
|
/* we got pages count value */
|
|
char *eptr;
|
|
pages = strtoul(str, &eptr, 10);
|
|
if (*eptr != '\0')
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (pages == 0 && min == 0) {
|
|
/* leave number of pages at 0 */
|
|
} else if (!is_power_of_2(pages)) {
|
|
char buf[100];
|
|
|
|
/* round pages up to next power of 2 */
|
|
pages = roundup_pow_of_two(pages);
|
|
if (!pages)
|
|
return -EINVAL;
|
|
|
|
unit_number__scnprintf(buf, sizeof(buf), pages * page_size);
|
|
pr_info("rounding mmap pages size to %s (%lu pages)\n",
|
|
buf, pages);
|
|
}
|
|
|
|
if (pages > max)
|
|
return -EINVAL;
|
|
|
|
return pages;
|
|
}
|
|
|
|
int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str)
|
|
{
|
|
unsigned long max = UINT_MAX;
|
|
long pages;
|
|
|
|
if (max > SIZE_MAX / page_size)
|
|
max = SIZE_MAX / page_size;
|
|
|
|
pages = parse_pages_arg(str, 1, max);
|
|
if (pages < 0) {
|
|
pr_err("Invalid argument for --mmap_pages/-m\n");
|
|
return -1;
|
|
}
|
|
|
|
*mmap_pages = pages;
|
|
return 0;
|
|
}
|
|
|
|
int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str,
|
|
int unset __maybe_unused)
|
|
{
|
|
return __perf_evlist__parse_mmap_pages(opt->value, str);
|
|
}
|
|
|
|
/**
|
|
* evlist__mmap_ex - Create mmaps to receive events.
|
|
* @evlist: list of events
|
|
* @pages: map length in pages
|
|
* @overwrite: overwrite older events?
|
|
* @auxtrace_pages - auxtrace map length in pages
|
|
* @auxtrace_overwrite - overwrite older auxtrace data?
|
|
*
|
|
* If @overwrite is %false the user needs to signal event consumption using
|
|
* perf_mmap__write_tail(). Using evlist__mmap_read() does this
|
|
* automatically.
|
|
*
|
|
* Similarly, if @auxtrace_overwrite is %false the user needs to signal data
|
|
* consumption using auxtrace_mmap__write_tail().
|
|
*
|
|
* Return: %0 on success, negative error code otherwise.
|
|
*/
|
|
int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
|
|
unsigned int auxtrace_pages,
|
|
bool auxtrace_overwrite, int nr_cblocks, int affinity, int flush,
|
|
int comp_level)
|
|
{
|
|
struct evsel *evsel;
|
|
const struct perf_cpu_map *cpus = evlist->core.cpus;
|
|
const struct perf_thread_map *threads = evlist->core.threads;
|
|
/*
|
|
* Delay setting mp.prot: set it before calling perf_mmap__mmap.
|
|
* Its value is decided by evsel's write_backward.
|
|
* So &mp should not be passed through const pointer.
|
|
*/
|
|
struct mmap_params mp = { .nr_cblocks = nr_cblocks, .affinity = affinity, .flush = flush,
|
|
.comp_level = comp_level };
|
|
|
|
if (!evlist->mmap)
|
|
evlist->mmap = evlist__alloc_mmap(evlist, false);
|
|
if (!evlist->mmap)
|
|
return -ENOMEM;
|
|
|
|
if (evlist->core.pollfd.entries == NULL && perf_evlist__alloc_pollfd(&evlist->core) < 0)
|
|
return -ENOMEM;
|
|
|
|
evlist->core.mmap_len = evlist__mmap_size(pages);
|
|
pr_debug("mmap size %zuB\n", evlist->core.mmap_len);
|
|
mp.mask = evlist->core.mmap_len - page_size - 1;
|
|
|
|
auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->core.mmap_len,
|
|
auxtrace_pages, auxtrace_overwrite);
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
if ((evsel->core.attr.read_format & PERF_FORMAT_ID) &&
|
|
evsel->core.sample_id == NULL &&
|
|
perf_evsel__alloc_id(&evsel->core, perf_cpu_map__nr(cpus), threads->nr) < 0)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (perf_cpu_map__empty(cpus))
|
|
return evlist__mmap_per_thread(evlist, &mp);
|
|
|
|
return evlist__mmap_per_cpu(evlist, &mp);
|
|
}
|
|
|
|
int evlist__mmap(struct evlist *evlist, unsigned int pages)
|
|
{
|
|
return evlist__mmap_ex(evlist, pages, 0, false, 0, PERF_AFFINITY_SYS, 1, 0);
|
|
}
|
|
|
|
int perf_evlist__create_maps(struct evlist *evlist, struct target *target)
|
|
{
|
|
bool all_threads = (target->per_thread && target->system_wide);
|
|
struct perf_cpu_map *cpus;
|
|
struct perf_thread_map *threads;
|
|
|
|
/*
|
|
* If specify '-a' and '--per-thread' to perf record, perf record
|
|
* will override '--per-thread'. target->per_thread = false and
|
|
* target->system_wide = true.
|
|
*
|
|
* If specify '--per-thread' only to perf record,
|
|
* target->per_thread = true and target->system_wide = false.
|
|
*
|
|
* So target->per_thread && target->system_wide is false.
|
|
* For perf record, thread_map__new_str doesn't call
|
|
* thread_map__new_all_cpus. That will keep perf record's
|
|
* current behavior.
|
|
*
|
|
* For perf stat, it allows the case that target->per_thread and
|
|
* target->system_wide are all true. It means to collect system-wide
|
|
* per-thread data. thread_map__new_str will call
|
|
* thread_map__new_all_cpus to enumerate all threads.
|
|
*/
|
|
threads = thread_map__new_str(target->pid, target->tid, target->uid,
|
|
all_threads);
|
|
|
|
if (!threads)
|
|
return -1;
|
|
|
|
if (target__uses_dummy_map(target))
|
|
cpus = perf_cpu_map__dummy_new();
|
|
else
|
|
cpus = perf_cpu_map__new(target->cpu_list);
|
|
|
|
if (!cpus)
|
|
goto out_delete_threads;
|
|
|
|
evlist->core.has_user_cpus = !!target->cpu_list;
|
|
|
|
perf_evlist__set_maps(&evlist->core, cpus, threads);
|
|
|
|
return 0;
|
|
|
|
out_delete_threads:
|
|
perf_thread_map__put(threads);
|
|
return -1;
|
|
}
|
|
|
|
void __perf_evlist__set_sample_bit(struct evlist *evlist,
|
|
enum perf_event_sample_format bit)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
evlist__for_each_entry(evlist, evsel)
|
|
__perf_evsel__set_sample_bit(evsel, bit);
|
|
}
|
|
|
|
void __perf_evlist__reset_sample_bit(struct evlist *evlist,
|
|
enum perf_event_sample_format bit)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
evlist__for_each_entry(evlist, evsel)
|
|
__perf_evsel__reset_sample_bit(evsel, bit);
|
|
}
|
|
|
|
int perf_evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel)
|
|
{
|
|
struct evsel *evsel;
|
|
int err = 0;
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
if (evsel->filter == NULL)
|
|
continue;
|
|
|
|
/*
|
|
* filters only work for tracepoint event, which doesn't have cpu limit.
|
|
* So evlist and evsel should always be same.
|
|
*/
|
|
err = perf_evsel__apply_filter(&evsel->core, evsel->filter);
|
|
if (err) {
|
|
*err_evsel = evsel;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
int perf_evlist__set_tp_filter(struct evlist *evlist, const char *filter)
|
|
{
|
|
struct evsel *evsel;
|
|
int err = 0;
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT)
|
|
continue;
|
|
|
|
err = perf_evsel__set_filter(evsel, filter);
|
|
if (err)
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
int perf_evlist__set_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids)
|
|
{
|
|
char *filter;
|
|
int ret = -1;
|
|
size_t i;
|
|
|
|
for (i = 0; i < npids; ++i) {
|
|
if (i == 0) {
|
|
if (asprintf(&filter, "common_pid != %d", pids[i]) < 0)
|
|
return -1;
|
|
} else {
|
|
char *tmp;
|
|
|
|
if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0)
|
|
goto out_free;
|
|
|
|
free(filter);
|
|
filter = tmp;
|
|
}
|
|
}
|
|
|
|
ret = perf_evlist__set_tp_filter(evlist, filter);
|
|
out_free:
|
|
free(filter);
|
|
return ret;
|
|
}
|
|
|
|
int perf_evlist__set_tp_filter_pid(struct evlist *evlist, pid_t pid)
|
|
{
|
|
return perf_evlist__set_tp_filter_pids(evlist, 1, &pid);
|
|
}
|
|
|
|
bool perf_evlist__valid_sample_type(struct evlist *evlist)
|
|
{
|
|
struct evsel *pos;
|
|
|
|
if (evlist->core.nr_entries == 1)
|
|
return true;
|
|
|
|
if (evlist->id_pos < 0 || evlist->is_pos < 0)
|
|
return false;
|
|
|
|
evlist__for_each_entry(evlist, pos) {
|
|
if (pos->id_pos != evlist->id_pos ||
|
|
pos->is_pos != evlist->is_pos)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
u64 __perf_evlist__combined_sample_type(struct evlist *evlist)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
if (evlist->combined_sample_type)
|
|
return evlist->combined_sample_type;
|
|
|
|
evlist__for_each_entry(evlist, evsel)
|
|
evlist->combined_sample_type |= evsel->core.attr.sample_type;
|
|
|
|
return evlist->combined_sample_type;
|
|
}
|
|
|
|
u64 perf_evlist__combined_sample_type(struct evlist *evlist)
|
|
{
|
|
evlist->combined_sample_type = 0;
|
|
return __perf_evlist__combined_sample_type(evlist);
|
|
}
|
|
|
|
u64 perf_evlist__combined_branch_type(struct evlist *evlist)
|
|
{
|
|
struct evsel *evsel;
|
|
u64 branch_type = 0;
|
|
|
|
evlist__for_each_entry(evlist, evsel)
|
|
branch_type |= evsel->core.attr.branch_sample_type;
|
|
return branch_type;
|
|
}
|
|
|
|
bool perf_evlist__valid_read_format(struct evlist *evlist)
|
|
{
|
|
struct evsel *first = evlist__first(evlist), *pos = first;
|
|
u64 read_format = first->core.attr.read_format;
|
|
u64 sample_type = first->core.attr.sample_type;
|
|
|
|
evlist__for_each_entry(evlist, pos) {
|
|
if (read_format != pos->core.attr.read_format)
|
|
return false;
|
|
}
|
|
|
|
/* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */
|
|
if ((sample_type & PERF_SAMPLE_READ) &&
|
|
!(read_format & PERF_FORMAT_ID)) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
u16 perf_evlist__id_hdr_size(struct evlist *evlist)
|
|
{
|
|
struct evsel *first = evlist__first(evlist);
|
|
struct perf_sample *data;
|
|
u64 sample_type;
|
|
u16 size = 0;
|
|
|
|
if (!first->core.attr.sample_id_all)
|
|
goto out;
|
|
|
|
sample_type = first->core.attr.sample_type;
|
|
|
|
if (sample_type & PERF_SAMPLE_TID)
|
|
size += sizeof(data->tid) * 2;
|
|
|
|
if (sample_type & PERF_SAMPLE_TIME)
|
|
size += sizeof(data->time);
|
|
|
|
if (sample_type & PERF_SAMPLE_ID)
|
|
size += sizeof(data->id);
|
|
|
|
if (sample_type & PERF_SAMPLE_STREAM_ID)
|
|
size += sizeof(data->stream_id);
|
|
|
|
if (sample_type & PERF_SAMPLE_CPU)
|
|
size += sizeof(data->cpu) * 2;
|
|
|
|
if (sample_type & PERF_SAMPLE_IDENTIFIER)
|
|
size += sizeof(data->id);
|
|
out:
|
|
return size;
|
|
}
|
|
|
|
bool perf_evlist__valid_sample_id_all(struct evlist *evlist)
|
|
{
|
|
struct evsel *first = evlist__first(evlist), *pos = first;
|
|
|
|
evlist__for_each_entry_continue(evlist, pos) {
|
|
if (first->core.attr.sample_id_all != pos->core.attr.sample_id_all)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool perf_evlist__sample_id_all(struct evlist *evlist)
|
|
{
|
|
struct evsel *first = evlist__first(evlist);
|
|
return first->core.attr.sample_id_all;
|
|
}
|
|
|
|
void perf_evlist__set_selected(struct evlist *evlist,
|
|
struct evsel *evsel)
|
|
{
|
|
evlist->selected = evsel;
|
|
}
|
|
|
|
void evlist__close(struct evlist *evlist)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
evlist__for_each_entry_reverse(evlist, evsel)
|
|
evsel__close(evsel);
|
|
}
|
|
|
|
static int perf_evlist__create_syswide_maps(struct evlist *evlist)
|
|
{
|
|
struct perf_cpu_map *cpus;
|
|
struct perf_thread_map *threads;
|
|
int err = -ENOMEM;
|
|
|
|
/*
|
|
* Try reading /sys/devices/system/cpu/online to get
|
|
* an all cpus map.
|
|
*
|
|
* FIXME: -ENOMEM is the best we can do here, the cpu_map
|
|
* code needs an overhaul to properly forward the
|
|
* error, and we may not want to do that fallback to a
|
|
* default cpu identity map :-\
|
|
*/
|
|
cpus = perf_cpu_map__new(NULL);
|
|
if (!cpus)
|
|
goto out;
|
|
|
|
threads = perf_thread_map__new_dummy();
|
|
if (!threads)
|
|
goto out_put;
|
|
|
|
perf_evlist__set_maps(&evlist->core, cpus, threads);
|
|
out:
|
|
return err;
|
|
out_put:
|
|
perf_cpu_map__put(cpus);
|
|
goto out;
|
|
}
|
|
|
|
int evlist__open(struct evlist *evlist)
|
|
{
|
|
struct evsel *evsel;
|
|
int err;
|
|
|
|
/*
|
|
* Default: one fd per CPU, all threads, aka systemwide
|
|
* as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL
|
|
*/
|
|
if (evlist->core.threads == NULL && evlist->core.cpus == NULL) {
|
|
err = perf_evlist__create_syswide_maps(evlist);
|
|
if (err < 0)
|
|
goto out_err;
|
|
}
|
|
|
|
perf_evlist__update_id_pos(evlist);
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
err = evsel__open(evsel, evsel->core.cpus, evsel->core.threads);
|
|
if (err < 0)
|
|
goto out_err;
|
|
}
|
|
|
|
return 0;
|
|
out_err:
|
|
evlist__close(evlist);
|
|
errno = -err;
|
|
return err;
|
|
}
|
|
|
|
int perf_evlist__prepare_workload(struct evlist *evlist, struct target *target,
|
|
const char *argv[], bool pipe_output,
|
|
void (*exec_error)(int signo, siginfo_t *info, void *ucontext))
|
|
{
|
|
int child_ready_pipe[2], go_pipe[2];
|
|
char bf;
|
|
|
|
if (pipe(child_ready_pipe) < 0) {
|
|
perror("failed to create 'ready' pipe");
|
|
return -1;
|
|
}
|
|
|
|
if (pipe(go_pipe) < 0) {
|
|
perror("failed to create 'go' pipe");
|
|
goto out_close_ready_pipe;
|
|
}
|
|
|
|
evlist->workload.pid = fork();
|
|
if (evlist->workload.pid < 0) {
|
|
perror("failed to fork");
|
|
goto out_close_pipes;
|
|
}
|
|
|
|
if (!evlist->workload.pid) {
|
|
int ret;
|
|
|
|
if (pipe_output)
|
|
dup2(2, 1);
|
|
|
|
signal(SIGTERM, SIG_DFL);
|
|
|
|
close(child_ready_pipe[0]);
|
|
close(go_pipe[1]);
|
|
fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
|
|
|
|
/*
|
|
* Tell the parent we're ready to go
|
|
*/
|
|
close(child_ready_pipe[1]);
|
|
|
|
/*
|
|
* Wait until the parent tells us to go.
|
|
*/
|
|
ret = read(go_pipe[0], &bf, 1);
|
|
/*
|
|
* The parent will ask for the execvp() to be performed by
|
|
* writing exactly one byte, in workload.cork_fd, usually via
|
|
* perf_evlist__start_workload().
|
|
*
|
|
* For cancelling the workload without actually running it,
|
|
* the parent will just close workload.cork_fd, without writing
|
|
* anything, i.e. read will return zero and we just exit()
|
|
* here.
|
|
*/
|
|
if (ret != 1) {
|
|
if (ret == -1)
|
|
perror("unable to read pipe");
|
|
exit(ret);
|
|
}
|
|
|
|
execvp(argv[0], (char **)argv);
|
|
|
|
if (exec_error) {
|
|
union sigval val;
|
|
|
|
val.sival_int = errno;
|
|
if (sigqueue(getppid(), SIGUSR1, val))
|
|
perror(argv[0]);
|
|
} else
|
|
perror(argv[0]);
|
|
exit(-1);
|
|
}
|
|
|
|
if (exec_error) {
|
|
struct sigaction act = {
|
|
.sa_flags = SA_SIGINFO,
|
|
.sa_sigaction = exec_error,
|
|
};
|
|
sigaction(SIGUSR1, &act, NULL);
|
|
}
|
|
|
|
if (target__none(target)) {
|
|
if (evlist->core.threads == NULL) {
|
|
fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n",
|
|
__func__, __LINE__);
|
|
goto out_close_pipes;
|
|
}
|
|
perf_thread_map__set_pid(evlist->core.threads, 0, evlist->workload.pid);
|
|
}
|
|
|
|
close(child_ready_pipe[1]);
|
|
close(go_pipe[0]);
|
|
/*
|
|
* wait for child to settle
|
|
*/
|
|
if (read(child_ready_pipe[0], &bf, 1) == -1) {
|
|
perror("unable to read pipe");
|
|
goto out_close_pipes;
|
|
}
|
|
|
|
fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC);
|
|
evlist->workload.cork_fd = go_pipe[1];
|
|
close(child_ready_pipe[0]);
|
|
return 0;
|
|
|
|
out_close_pipes:
|
|
close(go_pipe[0]);
|
|
close(go_pipe[1]);
|
|
out_close_ready_pipe:
|
|
close(child_ready_pipe[0]);
|
|
close(child_ready_pipe[1]);
|
|
return -1;
|
|
}
|
|
|
|
int perf_evlist__start_workload(struct evlist *evlist)
|
|
{
|
|
if (evlist->workload.cork_fd > 0) {
|
|
char bf = 0;
|
|
int ret;
|
|
/*
|
|
* Remove the cork, let it rip!
|
|
*/
|
|
ret = write(evlist->workload.cork_fd, &bf, 1);
|
|
if (ret < 0)
|
|
perror("unable to write to pipe");
|
|
|
|
close(evlist->workload.cork_fd);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_evlist__parse_sample(struct evlist *evlist, union perf_event *event,
|
|
struct perf_sample *sample)
|
|
{
|
|
struct evsel *evsel = perf_evlist__event2evsel(evlist, event);
|
|
|
|
if (!evsel)
|
|
return -EFAULT;
|
|
return perf_evsel__parse_sample(evsel, event, sample);
|
|
}
|
|
|
|
int perf_evlist__parse_sample_timestamp(struct evlist *evlist,
|
|
union perf_event *event,
|
|
u64 *timestamp)
|
|
{
|
|
struct evsel *evsel = perf_evlist__event2evsel(evlist, event);
|
|
|
|
if (!evsel)
|
|
return -EFAULT;
|
|
return perf_evsel__parse_sample_timestamp(evsel, event, timestamp);
|
|
}
|
|
|
|
int perf_evlist__strerror_open(struct evlist *evlist,
|
|
int err, char *buf, size_t size)
|
|
{
|
|
int printed, value;
|
|
char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf));
|
|
|
|
switch (err) {
|
|
case EACCES:
|
|
case EPERM:
|
|
printed = scnprintf(buf, size,
|
|
"Error:\t%s.\n"
|
|
"Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg);
|
|
|
|
value = perf_event_paranoid();
|
|
|
|
printed += scnprintf(buf + printed, size - printed, "\nHint:\t");
|
|
|
|
if (value >= 2) {
|
|
printed += scnprintf(buf + printed, size - printed,
|
|
"For your workloads it needs to be <= 1\nHint:\t");
|
|
}
|
|
printed += scnprintf(buf + printed, size - printed,
|
|
"For system wide tracing it needs to be set to -1.\n");
|
|
|
|
printed += scnprintf(buf + printed, size - printed,
|
|
"Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n"
|
|
"Hint:\tThe current value is %d.", value);
|
|
break;
|
|
case EINVAL: {
|
|
struct evsel *first = evlist__first(evlist);
|
|
int max_freq;
|
|
|
|
if (sysctl__read_int("kernel/perf_event_max_sample_rate", &max_freq) < 0)
|
|
goto out_default;
|
|
|
|
if (first->core.attr.sample_freq < (u64)max_freq)
|
|
goto out_default;
|
|
|
|
printed = scnprintf(buf, size,
|
|
"Error:\t%s.\n"
|
|
"Hint:\tCheck /proc/sys/kernel/perf_event_max_sample_rate.\n"
|
|
"Hint:\tThe current value is %d and %" PRIu64 " is being requested.",
|
|
emsg, max_freq, first->core.attr.sample_freq);
|
|
break;
|
|
}
|
|
default:
|
|
out_default:
|
|
scnprintf(buf, size, "%s", emsg);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_evlist__strerror_mmap(struct evlist *evlist, int err, char *buf, size_t size)
|
|
{
|
|
char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf));
|
|
int pages_attempted = evlist->core.mmap_len / 1024, pages_max_per_user, printed = 0;
|
|
|
|
switch (err) {
|
|
case EPERM:
|
|
sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user);
|
|
printed += scnprintf(buf + printed, size - printed,
|
|
"Error:\t%s.\n"
|
|
"Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n"
|
|
"Hint:\tTried using %zd kB.\n",
|
|
emsg, pages_max_per_user, pages_attempted);
|
|
|
|
if (pages_attempted >= pages_max_per_user) {
|
|
printed += scnprintf(buf + printed, size - printed,
|
|
"Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n",
|
|
pages_max_per_user + pages_attempted);
|
|
}
|
|
|
|
printed += scnprintf(buf + printed, size - printed,
|
|
"Hint:\tTry using a smaller -m/--mmap-pages value.");
|
|
break;
|
|
default:
|
|
scnprintf(buf, size, "%s", emsg);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void perf_evlist__to_front(struct evlist *evlist,
|
|
struct evsel *move_evsel)
|
|
{
|
|
struct evsel *evsel, *n;
|
|
LIST_HEAD(move);
|
|
|
|
if (move_evsel == evlist__first(evlist))
|
|
return;
|
|
|
|
evlist__for_each_entry_safe(evlist, n, evsel) {
|
|
if (evsel->leader == move_evsel->leader)
|
|
list_move_tail(&evsel->core.node, &move);
|
|
}
|
|
|
|
list_splice(&move, &evlist->core.entries);
|
|
}
|
|
|
|
void perf_evlist__set_tracking_event(struct evlist *evlist,
|
|
struct evsel *tracking_evsel)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
if (tracking_evsel->tracking)
|
|
return;
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
if (evsel != tracking_evsel)
|
|
evsel->tracking = false;
|
|
}
|
|
|
|
tracking_evsel->tracking = true;
|
|
}
|
|
|
|
struct evsel *
|
|
perf_evlist__find_evsel_by_str(struct evlist *evlist,
|
|
const char *str)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
if (!evsel->name)
|
|
continue;
|
|
if (strcmp(str, evsel->name) == 0)
|
|
return evsel;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void perf_evlist__toggle_bkw_mmap(struct evlist *evlist,
|
|
enum bkw_mmap_state state)
|
|
{
|
|
enum bkw_mmap_state old_state = evlist->bkw_mmap_state;
|
|
enum action {
|
|
NONE,
|
|
PAUSE,
|
|
RESUME,
|
|
} action = NONE;
|
|
|
|
if (!evlist->overwrite_mmap)
|
|
return;
|
|
|
|
switch (old_state) {
|
|
case BKW_MMAP_NOTREADY: {
|
|
if (state != BKW_MMAP_RUNNING)
|
|
goto state_err;
|
|
break;
|
|
}
|
|
case BKW_MMAP_RUNNING: {
|
|
if (state != BKW_MMAP_DATA_PENDING)
|
|
goto state_err;
|
|
action = PAUSE;
|
|
break;
|
|
}
|
|
case BKW_MMAP_DATA_PENDING: {
|
|
if (state != BKW_MMAP_EMPTY)
|
|
goto state_err;
|
|
break;
|
|
}
|
|
case BKW_MMAP_EMPTY: {
|
|
if (state != BKW_MMAP_RUNNING)
|
|
goto state_err;
|
|
action = RESUME;
|
|
break;
|
|
}
|
|
default:
|
|
WARN_ONCE(1, "Shouldn't get there\n");
|
|
}
|
|
|
|
evlist->bkw_mmap_state = state;
|
|
|
|
switch (action) {
|
|
case PAUSE:
|
|
perf_evlist__pause(evlist);
|
|
break;
|
|
case RESUME:
|
|
perf_evlist__resume(evlist);
|
|
break;
|
|
case NONE:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
state_err:
|
|
return;
|
|
}
|
|
|
|
bool perf_evlist__exclude_kernel(struct evlist *evlist)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
if (!evsel->core.attr.exclude_kernel)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Events in data file are not collect in groups, but we still want
|
|
* the group display. Set the artificial group and set the leader's
|
|
* forced_leader flag to notify the display code.
|
|
*/
|
|
void perf_evlist__force_leader(struct evlist *evlist)
|
|
{
|
|
if (!evlist->nr_groups) {
|
|
struct evsel *leader = evlist__first(evlist);
|
|
|
|
perf_evlist__set_leader(evlist);
|
|
leader->forced_leader = true;
|
|
}
|
|
}
|
|
|
|
struct evsel *perf_evlist__reset_weak_group(struct evlist *evsel_list,
|
|
struct evsel *evsel)
|
|
{
|
|
struct evsel *c2, *leader;
|
|
bool is_open = true;
|
|
|
|
leader = evsel->leader;
|
|
pr_debug("Weak group for %s/%d failed\n",
|
|
leader->name, leader->core.nr_members);
|
|
|
|
/*
|
|
* for_each_group_member doesn't work here because it doesn't
|
|
* include the first entry.
|
|
*/
|
|
evlist__for_each_entry(evsel_list, c2) {
|
|
if (c2 == evsel)
|
|
is_open = false;
|
|
if (c2->leader == leader) {
|
|
if (is_open)
|
|
perf_evsel__close(&c2->core);
|
|
c2->leader = c2;
|
|
c2->core.nr_members = 0;
|
|
}
|
|
}
|
|
return leader;
|
|
}
|
|
|
|
int perf_evlist__add_sb_event(struct evlist **evlist,
|
|
struct perf_event_attr *attr,
|
|
perf_evsel__sb_cb_t cb,
|
|
void *data)
|
|
{
|
|
struct evsel *evsel;
|
|
bool new_evlist = (*evlist) == NULL;
|
|
|
|
if (*evlist == NULL)
|
|
*evlist = evlist__new();
|
|
if (*evlist == NULL)
|
|
return -1;
|
|
|
|
if (!attr->sample_id_all) {
|
|
pr_warning("enabling sample_id_all for all side band events\n");
|
|
attr->sample_id_all = 1;
|
|
}
|
|
|
|
evsel = perf_evsel__new_idx(attr, (*evlist)->core.nr_entries);
|
|
if (!evsel)
|
|
goto out_err;
|
|
|
|
evsel->side_band.cb = cb;
|
|
evsel->side_band.data = data;
|
|
evlist__add(*evlist, evsel);
|
|
return 0;
|
|
|
|
out_err:
|
|
if (new_evlist) {
|
|
evlist__delete(*evlist);
|
|
*evlist = NULL;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static void *perf_evlist__poll_thread(void *arg)
|
|
{
|
|
struct evlist *evlist = arg;
|
|
bool draining = false;
|
|
int i, done = 0;
|
|
/*
|
|
* In order to read symbols from other namespaces perf to needs to call
|
|
* setns(2). This isn't permitted if the struct_fs has multiple users.
|
|
* unshare(2) the fs so that we may continue to setns into namespaces
|
|
* that we're observing when, for instance, reading the build-ids at
|
|
* the end of a 'perf record' session.
|
|
*/
|
|
unshare(CLONE_FS);
|
|
|
|
while (!done) {
|
|
bool got_data = false;
|
|
|
|
if (evlist->thread.done)
|
|
draining = true;
|
|
|
|
if (!draining)
|
|
evlist__poll(evlist, 1000);
|
|
|
|
for (i = 0; i < evlist->core.nr_mmaps; i++) {
|
|
struct mmap *map = &evlist->mmap[i];
|
|
union perf_event *event;
|
|
|
|
if (perf_mmap__read_init(map))
|
|
continue;
|
|
while ((event = perf_mmap__read_event(map)) != NULL) {
|
|
struct evsel *evsel = perf_evlist__event2evsel(evlist, event);
|
|
|
|
if (evsel && evsel->side_band.cb)
|
|
evsel->side_band.cb(event, evsel->side_band.data);
|
|
else
|
|
pr_warning("cannot locate proper evsel for the side band event\n");
|
|
|
|
perf_mmap__consume(map);
|
|
got_data = true;
|
|
}
|
|
perf_mmap__read_done(map);
|
|
}
|
|
|
|
if (draining && !got_data)
|
|
break;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int perf_evlist__start_sb_thread(struct evlist *evlist,
|
|
struct target *target)
|
|
{
|
|
struct evsel *counter;
|
|
|
|
if (!evlist)
|
|
return 0;
|
|
|
|
if (perf_evlist__create_maps(evlist, target))
|
|
goto out_delete_evlist;
|
|
|
|
evlist__for_each_entry(evlist, counter) {
|
|
if (evsel__open(counter, evlist->core.cpus,
|
|
evlist->core.threads) < 0)
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
if (evlist__mmap(evlist, UINT_MAX))
|
|
goto out_delete_evlist;
|
|
|
|
evlist__for_each_entry(evlist, counter) {
|
|
if (evsel__enable(counter))
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
evlist->thread.done = 0;
|
|
if (pthread_create(&evlist->thread.th, NULL, perf_evlist__poll_thread, evlist))
|
|
goto out_delete_evlist;
|
|
|
|
return 0;
|
|
|
|
out_delete_evlist:
|
|
evlist__delete(evlist);
|
|
evlist = NULL;
|
|
return -1;
|
|
}
|
|
|
|
void perf_evlist__stop_sb_thread(struct evlist *evlist)
|
|
{
|
|
if (!evlist)
|
|
return;
|
|
evlist->thread.done = 1;
|
|
pthread_join(evlist->thread.th, NULL);
|
|
evlist__delete(evlist);
|
|
}
|