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-rw-r--r--tools/perf/util/evlist.c2450
1 files changed, 2450 insertions, 0 deletions
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
new file mode 100644
index 000000000..ca08e6dc8
--- /dev/null
+++ b/tools/perf/util/evlist.c
@@ -0,0 +1,2450 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * 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.
+ */
+#include <api/fs/fs.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <poll.h>
+#include "cpumap.h"
+#include "util/mmap.h"
+#include "thread_map.h"
+#include "target.h"
+#include "evlist.h"
+#include "evsel.h"
+#include "record.h"
+#include "debug.h"
+#include "units.h"
+#include "bpf_counter.h"
+#include <internal/lib.h> // page_size
+#include "affinity.h"
+#include "../perf.h"
+#include "asm/bug.h"
+#include "bpf-event.h"
+#include "util/string2.h"
+#include "util/perf_api_probe.h"
+#include "util/evsel_fprintf.h"
+#include "util/evlist-hybrid.h"
+#include "util/pmu.h"
+#include <signal.h>
+#include <unistd.h>
+#include <sched.h>
+#include <stdlib.h>
+
+#include "parse-events.h"
+#include <subcmd/parse-options.h>
+
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/prctl.h>
+#include <sys/timerfd.h>
+
+#include <linux/bitops.h>
+#include <linux/hash.h>
+#include <linux/log2.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <linux/time64.h>
+#include <linux/zalloc.h>
+#include <perf/evlist.h>
+#include <perf/evsel.h>
+#include <perf/cpumap.h>
+#include <perf/mmap.h>
+
+#include <internal/xyarray.h>
+
+#ifdef LACKS_SIGQUEUE_PROTOTYPE
+int sigqueue(pid_t pid, int sig, const union sigval value);
+#endif
+
+#define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y))
+#define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y)
+
+void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus,
+ struct perf_thread_map *threads)
+{
+ perf_evlist__init(&evlist->core);
+ perf_evlist__set_maps(&evlist->core, cpus, threads);
+ evlist->workload.pid = -1;
+ evlist->bkw_mmap_state = BKW_MMAP_NOTREADY;
+ evlist->ctl_fd.fd = -1;
+ evlist->ctl_fd.ack = -1;
+ evlist->ctl_fd.pos = -1;
+}
+
+struct evlist *evlist__new(void)
+{
+ struct evlist *evlist = zalloc(sizeof(*evlist));
+
+ if (evlist != NULL)
+ evlist__init(evlist, NULL, NULL);
+
+ return evlist;
+}
+
+struct evlist *evlist__new_default(void)
+{
+ struct evlist *evlist = evlist__new();
+
+ if (evlist && evlist__add_default(evlist)) {
+ evlist__delete(evlist);
+ evlist = NULL;
+ }
+
+ return evlist;
+}
+
+struct evlist *evlist__new_dummy(void)
+{
+ struct evlist *evlist = evlist__new();
+
+ if (evlist && evlist__add_dummy(evlist)) {
+ evlist__delete(evlist);
+ evlist = NULL;
+ }
+
+ return evlist;
+}
+
+/**
+ * evlist__set_id_pos - set the positions of event ids.
+ * @evlist: selected event list
+ *
+ * Events with compatible sample types all have the same id_pos
+ * and is_pos. For convenience, put a copy on evlist.
+ */
+void evlist__set_id_pos(struct evlist *evlist)
+{
+ struct evsel *first = evlist__first(evlist);
+
+ evlist->id_pos = first->id_pos;
+ evlist->is_pos = first->is_pos;
+}
+
+static void evlist__update_id_pos(struct evlist *evlist)
+{
+ struct evsel *evsel;
+
+ evlist__for_each_entry(evlist, evsel)
+ evsel__calc_id_pos(evsel);
+
+ evlist__set_id_pos(evlist);
+}
+
+static void evlist__purge(struct evlist *evlist)
+{
+ struct evsel *pos, *n;
+
+ evlist__for_each_entry_safe(evlist, n, pos) {
+ list_del_init(&pos->core.node);
+ pos->evlist = NULL;
+ evsel__delete(pos);
+ }
+
+ evlist->core.nr_entries = 0;
+}
+
+void evlist__exit(struct evlist *evlist)
+{
+ event_enable_timer__exit(&evlist->eet);
+ zfree(&evlist->mmap);
+ zfree(&evlist->overwrite_mmap);
+ perf_evlist__exit(&evlist->core);
+}
+
+void evlist__delete(struct evlist *evlist)
+{
+ if (evlist == NULL)
+ return;
+
+ evlist__munmap(evlist);
+ evlist__close(evlist);
+ evlist__purge(evlist);
+ evlist__exit(evlist);
+ free(evlist);
+}
+
+void evlist__add(struct evlist *evlist, struct evsel *entry)
+{
+ perf_evlist__add(&evlist->core, &entry->core);
+ entry->evlist = evlist;
+ entry->tracking = !entry->core.idx;
+
+ if (evlist->core.nr_entries == 1)
+ evlist__set_id_pos(evlist);
+}
+
+void evlist__remove(struct evlist *evlist, struct evsel *evsel)
+{
+ evsel->evlist = NULL;
+ perf_evlist__remove(&evlist->core, &evsel->core);
+}
+
+void evlist__splice_list_tail(struct evlist *evlist, struct list_head *list)
+{
+ while (!list_empty(list)) {
+ struct evsel *evsel, *temp, *leader = NULL;
+
+ __evlist__for_each_entry_safe(list, temp, evsel) {
+ list_del_init(&evsel->core.node);
+ evlist__add(evlist, evsel);
+ leader = evsel;
+ break;
+ }
+
+ __evlist__for_each_entry_safe(list, temp, evsel) {
+ if (evsel__has_leader(evsel, leader)) {
+ list_del_init(&evsel->core.node);
+ evlist__add(evlist, evsel);
+ }
+ }
+ }
+}
+
+int __evlist__set_tracepoints_handlers(struct evlist *evlist,
+ const struct evsel_str_handler *assocs, size_t nr_assocs)
+{
+ size_t i;
+ int err;
+
+ for (i = 0; i < nr_assocs; i++) {
+ // Adding a handler for an event not in this evlist, just ignore it.
+ struct evsel *evsel = evlist__find_tracepoint_by_name(evlist, assocs[i].name);
+ if (evsel == NULL)
+ continue;
+
+ err = -EEXIST;
+ if (evsel->handler != NULL)
+ goto out;
+ evsel->handler = assocs[i].handler;
+ }
+
+ err = 0;
+out:
+ return err;
+}
+
+void evlist__set_leader(struct evlist *evlist)
+{
+ perf_evlist__set_leader(&evlist->core);
+}
+
+int __evlist__add_default(struct evlist *evlist, bool precise)
+{
+ struct evsel *evsel;
+
+ evsel = evsel__new_cycles(precise, PERF_TYPE_HARDWARE,
+ PERF_COUNT_HW_CPU_CYCLES);
+ if (evsel == NULL)
+ return -ENOMEM;
+
+ evlist__add(evlist, evsel);
+ return 0;
+}
+
+static struct evsel *evlist__dummy_event(struct evlist *evlist)
+{
+ struct perf_event_attr attr = {
+ .type = PERF_TYPE_SOFTWARE,
+ .config = PERF_COUNT_SW_DUMMY,
+ .size = sizeof(attr), /* to capture ABI version */
+ /* Avoid frequency mode for dummy events to avoid associated timers. */
+ .freq = 0,
+ .sample_period = 1,
+ };
+
+ return evsel__new_idx(&attr, evlist->core.nr_entries);
+}
+
+int evlist__add_dummy(struct evlist *evlist)
+{
+ struct evsel *evsel = evlist__dummy_event(evlist);
+
+ if (evsel == NULL)
+ return -ENOMEM;
+
+ evlist__add(evlist, evsel);
+ return 0;
+}
+
+struct evsel *evlist__add_aux_dummy(struct evlist *evlist, bool system_wide)
+{
+ struct evsel *evsel = evlist__dummy_event(evlist);
+
+ if (!evsel)
+ return NULL;
+
+ evsel->core.attr.exclude_kernel = 1;
+ evsel->core.attr.exclude_guest = 1;
+ evsel->core.attr.exclude_hv = 1;
+ evsel->core.system_wide = system_wide;
+ evsel->no_aux_samples = true;
+ evsel->name = strdup("dummy:u");
+
+ evlist__add(evlist, evsel);
+ return evsel;
+}
+
+struct evsel *evlist__add_sched_switch(struct evlist *evlist, bool system_wide)
+{
+ struct evsel *evsel = evsel__newtp_idx("sched", "sched_switch", 0);
+
+ if (IS_ERR(evsel))
+ return evsel;
+
+ evsel__set_sample_bit(evsel, CPU);
+ evsel__set_sample_bit(evsel, TIME);
+
+ evsel->core.system_wide = system_wide;
+ evsel->no_aux_samples = true;
+
+ evlist__add(evlist, evsel);
+ return evsel;
+};
+
+int evlist__add_attrs(struct evlist *evlist, struct perf_event_attr *attrs, size_t nr_attrs)
+{
+ struct evsel *evsel, *n;
+ LIST_HEAD(head);
+ size_t i;
+
+ for (i = 0; i < nr_attrs; i++) {
+ evsel = evsel__new_idx(attrs + i, evlist->core.nr_entries + i);
+ if (evsel == NULL)
+ goto out_delete_partial_list;
+ list_add_tail(&evsel->core.node, &head);
+ }
+
+ evlist__splice_list_tail(evlist, &head);
+
+ return 0;
+
+out_delete_partial_list:
+ __evlist__for_each_entry_safe(&head, n, evsel)
+ evsel__delete(evsel);
+ return -1;
+}
+
+int __evlist__add_default_attrs(struct evlist *evlist, struct perf_event_attr *attrs, size_t nr_attrs)
+{
+ size_t i;
+
+ for (i = 0; i < nr_attrs; i++)
+ event_attr_init(attrs + i);
+
+ return evlist__add_attrs(evlist, attrs, nr_attrs);
+}
+
+__weak int arch_evlist__add_default_attrs(struct evlist *evlist,
+ struct perf_event_attr *attrs,
+ size_t nr_attrs)
+{
+ if (!nr_attrs)
+ return 0;
+
+ return __evlist__add_default_attrs(evlist, attrs, nr_attrs);
+}
+
+struct evsel *evlist__find_tracepoint_by_id(struct evlist *evlist, int id)
+{
+ struct evsel *evsel;
+
+ evlist__for_each_entry(evlist, evsel) {
+ if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
+ (int)evsel->core.attr.config == id)
+ return evsel;
+ }
+
+ return NULL;
+}
+
+struct evsel *evlist__find_tracepoint_by_name(struct evlist *evlist, const char *name)
+{
+ struct evsel *evsel;
+
+ evlist__for_each_entry(evlist, evsel) {
+ if ((evsel->core.attr.type == PERF_TYPE_TRACEPOINT) &&
+ (strcmp(evsel->name, name) == 0))
+ return evsel;
+ }
+
+ return NULL;
+}
+
+int evlist__add_newtp(struct evlist *evlist, const char *sys, const char *name, void *handler)
+{
+ struct evsel *evsel = evsel__newtp(sys, name);
+
+ if (IS_ERR(evsel))
+ return -1;
+
+ evsel->handler = handler;
+ evlist__add(evlist, evsel);
+ return 0;
+}
+
+struct evlist_cpu_iterator evlist__cpu_begin(struct evlist *evlist, struct affinity *affinity)
+{
+ struct evlist_cpu_iterator itr = {
+ .container = evlist,
+ .evsel = NULL,
+ .cpu_map_idx = 0,
+ .evlist_cpu_map_idx = 0,
+ .evlist_cpu_map_nr = perf_cpu_map__nr(evlist->core.all_cpus),
+ .cpu = (struct perf_cpu){ .cpu = -1},
+ .affinity = affinity,
+ };
+
+ if (evlist__empty(evlist)) {
+ /* Ensure the empty list doesn't iterate. */
+ itr.evlist_cpu_map_idx = itr.evlist_cpu_map_nr;
+ } else {
+ itr.evsel = evlist__first(evlist);
+ if (itr.affinity) {
+ itr.cpu = perf_cpu_map__cpu(evlist->core.all_cpus, 0);
+ affinity__set(itr.affinity, itr.cpu.cpu);
+ itr.cpu_map_idx = perf_cpu_map__idx(itr.evsel->core.cpus, itr.cpu);
+ /*
+ * If this CPU isn't in the evsel's cpu map then advance
+ * through the list.
+ */
+ if (itr.cpu_map_idx == -1)
+ evlist_cpu_iterator__next(&itr);
+ }
+ }
+ return itr;
+}
+
+void evlist_cpu_iterator__next(struct evlist_cpu_iterator *evlist_cpu_itr)
+{
+ while (evlist_cpu_itr->evsel != evlist__last(evlist_cpu_itr->container)) {
+ evlist_cpu_itr->evsel = evsel__next(evlist_cpu_itr->evsel);
+ evlist_cpu_itr->cpu_map_idx =
+ perf_cpu_map__idx(evlist_cpu_itr->evsel->core.cpus,
+ evlist_cpu_itr->cpu);
+ if (evlist_cpu_itr->cpu_map_idx != -1)
+ return;
+ }
+ evlist_cpu_itr->evlist_cpu_map_idx++;
+ if (evlist_cpu_itr->evlist_cpu_map_idx < evlist_cpu_itr->evlist_cpu_map_nr) {
+ evlist_cpu_itr->evsel = evlist__first(evlist_cpu_itr->container);
+ evlist_cpu_itr->cpu =
+ perf_cpu_map__cpu(evlist_cpu_itr->container->core.all_cpus,
+ evlist_cpu_itr->evlist_cpu_map_idx);
+ if (evlist_cpu_itr->affinity)
+ affinity__set(evlist_cpu_itr->affinity, evlist_cpu_itr->cpu.cpu);
+ evlist_cpu_itr->cpu_map_idx =
+ perf_cpu_map__idx(evlist_cpu_itr->evsel->core.cpus,
+ evlist_cpu_itr->cpu);
+ /*
+ * If this CPU isn't in the evsel's cpu map then advance through
+ * the list.
+ */
+ if (evlist_cpu_itr->cpu_map_idx == -1)
+ evlist_cpu_iterator__next(evlist_cpu_itr);
+ }
+}
+
+bool evlist_cpu_iterator__end(const struct evlist_cpu_iterator *evlist_cpu_itr)
+{
+ return evlist_cpu_itr->evlist_cpu_map_idx >= evlist_cpu_itr->evlist_cpu_map_nr;
+}
+
+static int evsel__strcmp(struct evsel *pos, char *evsel_name)
+{
+ if (!evsel_name)
+ return 0;
+ if (evsel__is_dummy_event(pos))
+ return 1;
+ return strcmp(pos->name, evsel_name);
+}
+
+static int evlist__is_enabled(struct evlist *evlist)
+{
+ struct evsel *pos;
+
+ evlist__for_each_entry(evlist, pos) {
+ if (!evsel__is_group_leader(pos) || !pos->core.fd)
+ continue;
+ /* If at least one event is enabled, evlist is enabled. */
+ if (!pos->disabled)
+ return true;
+ }
+ return false;
+}
+
+static void __evlist__disable(struct evlist *evlist, char *evsel_name, bool excl_dummy)
+{
+ struct evsel *pos;
+ struct evlist_cpu_iterator evlist_cpu_itr;
+ struct affinity saved_affinity, *affinity = NULL;
+ bool has_imm = false;
+
+ // See explanation in evlist__close()
+ if (!cpu_map__is_dummy(evlist->core.user_requested_cpus)) {
+ if (affinity__setup(&saved_affinity) < 0)
+ return;
+ affinity = &saved_affinity;
+ }
+
+ /* Disable 'immediate' events last */
+ for (int imm = 0; imm <= 1; imm++) {
+ evlist__for_each_cpu(evlist_cpu_itr, evlist, affinity) {
+ pos = evlist_cpu_itr.evsel;
+ if (evsel__strcmp(pos, evsel_name))
+ continue;
+ if (pos->disabled || !evsel__is_group_leader(pos) || !pos->core.fd)
+ continue;
+ if (excl_dummy && evsel__is_dummy_event(pos))
+ continue;
+ if (pos->immediate)
+ has_imm = true;
+ if (pos->immediate != imm)
+ continue;
+ evsel__disable_cpu(pos, evlist_cpu_itr.cpu_map_idx);
+ }
+ if (!has_imm)
+ break;
+ }
+
+ affinity__cleanup(affinity);
+ evlist__for_each_entry(evlist, pos) {
+ if (evsel__strcmp(pos, evsel_name))
+ continue;
+ if (!evsel__is_group_leader(pos) || !pos->core.fd)
+ continue;
+ if (excl_dummy && evsel__is_dummy_event(pos))
+ continue;
+ pos->disabled = true;
+ }
+
+ /*
+ * If we disabled only single event, we need to check
+ * the enabled state of the evlist manually.
+ */
+ if (evsel_name)
+ evlist->enabled = evlist__is_enabled(evlist);
+ else
+ evlist->enabled = false;
+}
+
+void evlist__disable(struct evlist *evlist)
+{
+ __evlist__disable(evlist, NULL, false);
+}
+
+void evlist__disable_non_dummy(struct evlist *evlist)
+{
+ __evlist__disable(evlist, NULL, true);
+}
+
+void evlist__disable_evsel(struct evlist *evlist, char *evsel_name)
+{
+ __evlist__disable(evlist, evsel_name, false);
+}
+
+static void __evlist__enable(struct evlist *evlist, char *evsel_name, bool excl_dummy)
+{
+ struct evsel *pos;
+ struct evlist_cpu_iterator evlist_cpu_itr;
+ struct affinity saved_affinity, *affinity = NULL;
+
+ // See explanation in evlist__close()
+ if (!cpu_map__is_dummy(evlist->core.user_requested_cpus)) {
+ if (affinity__setup(&saved_affinity) < 0)
+ return;
+ affinity = &saved_affinity;
+ }
+
+ evlist__for_each_cpu(evlist_cpu_itr, evlist, affinity) {
+ pos = evlist_cpu_itr.evsel;
+ if (evsel__strcmp(pos, evsel_name))
+ continue;
+ if (!evsel__is_group_leader(pos) || !pos->core.fd)
+ continue;
+ if (excl_dummy && evsel__is_dummy_event(pos))
+ continue;
+ evsel__enable_cpu(pos, evlist_cpu_itr.cpu_map_idx);
+ }
+ affinity__cleanup(affinity);
+ evlist__for_each_entry(evlist, pos) {
+ if (evsel__strcmp(pos, evsel_name))
+ continue;
+ if (!evsel__is_group_leader(pos) || !pos->core.fd)
+ continue;
+ if (excl_dummy && evsel__is_dummy_event(pos))
+ continue;
+ pos->disabled = false;
+ }
+
+ /*
+ * Even single event sets the 'enabled' for evlist,
+ * so the toggle can work properly and toggle to
+ * 'disabled' state.
+ */
+ evlist->enabled = true;
+}
+
+void evlist__enable(struct evlist *evlist)
+{
+ __evlist__enable(evlist, NULL, false);
+}
+
+void evlist__enable_non_dummy(struct evlist *evlist)
+{
+ __evlist__enable(evlist, NULL, true);
+}
+
+void evlist__enable_evsel(struct evlist *evlist, char *evsel_name)
+{
+ __evlist__enable(evlist, evsel_name, false);
+}
+
+void evlist__toggle_enable(struct evlist *evlist)
+{
+ (evlist->enabled ? evlist__disable : evlist__enable)(evlist);
+}
+
+int evlist__add_pollfd(struct evlist *evlist, int fd)
+{
+ return perf_evlist__add_pollfd(&evlist->core, fd, NULL, POLLIN, fdarray_flag__default);
+}
+
+int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask)
+{
+ return perf_evlist__filter_pollfd(&evlist->core, revents_and_mask);
+}
+
+#ifdef HAVE_EVENTFD_SUPPORT
+int evlist__add_wakeup_eventfd(struct evlist *evlist, int fd)
+{
+ return perf_evlist__add_pollfd(&evlist->core, fd, NULL, POLLIN,
+ fdarray_flag__nonfilterable |
+ fdarray_flag__non_perf_event);
+}
+#endif
+
+int evlist__poll(struct evlist *evlist, int timeout)
+{
+ return perf_evlist__poll(&evlist->core, timeout);
+}
+
+struct perf_sample_id *evlist__id2sid(struct evlist *evlist, u64 id)
+{
+ struct hlist_head *head;
+ struct perf_sample_id *sid;
+ int hash;
+
+ hash = hash_64(id, PERF_EVLIST__HLIST_BITS);
+ head = &evlist->core.heads[hash];
+
+ hlist_for_each_entry(sid, head, node)
+ if (sid->id == id)
+ return sid;
+
+ return NULL;
+}
+
+struct evsel *evlist__id2evsel(struct evlist *evlist, u64 id)
+{
+ struct perf_sample_id *sid;
+
+ if (evlist->core.nr_entries == 1 || !id)
+ return evlist__first(evlist);
+
+ sid = evlist__id2sid(evlist, id);
+ if (sid)
+ return container_of(sid->evsel, struct evsel, core);
+
+ if (!evlist__sample_id_all(evlist))
+ return evlist__first(evlist);
+
+ return NULL;
+}
+
+struct evsel *evlist__id2evsel_strict(struct evlist *evlist, u64 id)
+{
+ struct perf_sample_id *sid;
+
+ if (!id)
+ return NULL;
+
+ sid = evlist__id2sid(evlist, id);
+ if (sid)
+ return container_of(sid->evsel, struct evsel, core);
+
+ return NULL;
+}
+
+static int evlist__event2id(struct evlist *evlist, union perf_event *event, u64 *id)
+{
+ const __u64 *array = event->sample.array;
+ ssize_t n;
+
+ n = (event->header.size - sizeof(event->header)) >> 3;
+
+ if (event->header.type == PERF_RECORD_SAMPLE) {
+ if (evlist->id_pos >= n)
+ return -1;
+ *id = array[evlist->id_pos];
+ } else {
+ if (evlist->is_pos > n)
+ return -1;
+ n -= evlist->is_pos;
+ *id = array[n];
+ }
+ return 0;
+}
+
+struct evsel *evlist__event2evsel(struct evlist *evlist, union perf_event *event)
+{
+ struct evsel *first = evlist__first(evlist);
+ struct hlist_head *head;
+ struct perf_sample_id *sid;
+ int hash;
+ u64 id;
+
+ if (evlist->core.nr_entries == 1)
+ return first;
+
+ if (!first->core.attr.sample_id_all &&
+ event->header.type != PERF_RECORD_SAMPLE)
+ return first;
+
+ if (evlist__event2id(evlist, event, &id))
+ return NULL;
+
+ /* Synthesized events have an id of zero */
+ if (!id)
+ return first;
+
+ hash = hash_64(id, PERF_EVLIST__HLIST_BITS);
+ head = &evlist->core.heads[hash];
+
+ hlist_for_each_entry(sid, head, node) {
+ if (sid->id == id)
+ return container_of(sid->evsel, struct evsel, core);
+ }
+ return NULL;
+}
+
+static int 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 evlist__pause(struct evlist *evlist)
+{
+ return evlist__set_paused(evlist, true);
+}
+
+static int evlist__resume(struct evlist *evlist)
+{
+ return 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].core);
+
+ if (evlist->overwrite_mmap)
+ for (i = 0; i < evlist->core.nr_mmaps; i++)
+ perf_mmap__munmap(&evlist->overwrite_mmap[i].core);
+}
+
+void evlist__munmap(struct evlist *evlist)
+{
+ evlist__munmap_nofree(evlist);
+ zfree(&evlist->mmap);
+ zfree(&evlist->overwrite_mmap);
+}
+
+static void perf_mmap__unmap_cb(struct perf_mmap *map)
+{
+ struct mmap *m = container_of(map, struct mmap, core);
+
+ mmap__munmap(m);
+}
+
+static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
+ bool overwrite)
+{
+ int i;
+ struct mmap *map;
+
+ map = zalloc(evlist->core.nr_mmaps * sizeof(struct mmap));
+ if (!map)
+ return NULL;
+
+ for (i = 0; i < evlist->core.nr_mmaps; i++) {
+ struct perf_mmap *prev = i ? &map[i - 1].core : NULL;
+
+ /*
+ * 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.
+ */
+ perf_mmap__init(&map[i].core, prev, overwrite, perf_mmap__unmap_cb);
+ }
+
+ return map;
+}
+
+static void
+perf_evlist__mmap_cb_idx(struct perf_evlist *_evlist,
+ struct perf_evsel *_evsel,
+ struct perf_mmap_param *_mp,
+ int idx)
+{
+ struct evlist *evlist = container_of(_evlist, struct evlist, core);
+ struct mmap_params *mp = container_of(_mp, struct mmap_params, core);
+ struct evsel *evsel = container_of(_evsel, struct evsel, core);
+
+ auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, evsel, idx);
+}
+
+static struct perf_mmap*
+perf_evlist__mmap_cb_get(struct perf_evlist *_evlist, bool overwrite, int idx)
+{
+ struct evlist *evlist = container_of(_evlist, struct evlist, core);
+ struct mmap *maps;
+
+ maps = overwrite ? evlist->overwrite_mmap : evlist->mmap;
+
+ if (!maps) {
+ maps = evlist__alloc_mmap(evlist, overwrite);
+ if (!maps)
+ return NULL;
+
+ if (overwrite) {
+ evlist->overwrite_mmap = maps;
+ if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY)
+ evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
+ } else {
+ evlist->mmap = maps;
+ }
+ }
+
+ return &maps[idx].core;
+}
+
+static int
+perf_evlist__mmap_cb_mmap(struct perf_mmap *_map, struct perf_mmap_param *_mp,
+ int output, struct perf_cpu cpu)
+{
+ struct mmap *map = container_of(_map, struct mmap, core);
+ struct mmap_params *mp = container_of(_mp, struct mmap_params, core);
+
+ return mmap__mmap(map, mp, output, cpu);
+}
+
+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 __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 evlist__parse_mmap_pages(const struct option *opt, const char *str, int unset __maybe_unused)
+{
+ return __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)
+{
+ /*
+ * 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
+ };
+ struct perf_evlist_mmap_ops ops = {
+ .idx = perf_evlist__mmap_cb_idx,
+ .get = perf_evlist__mmap_cb_get,
+ .mmap = perf_evlist__mmap_cb_mmap,
+ };
+
+ evlist->core.mmap_len = evlist__mmap_size(pages);
+ pr_debug("mmap size %zuB\n", evlist->core.mmap_len);
+
+ auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->core.mmap_len,
+ auxtrace_pages, auxtrace_overwrite);
+
+ return perf_evlist__mmap_ops(&evlist->core, &ops, &mp.core);
+}
+
+int evlist__mmap(struct evlist *evlist, unsigned int pages)
+{
+ return evlist__mmap_ex(evlist, pages, 0, false, 0, PERF_AFFINITY_SYS, 1, 0);
+}
+
+int 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 && !target->hybrid;
+
+ perf_evlist__set_maps(&evlist->core, cpus, threads);
+
+ /* as evlist now has references, put count here */
+ perf_cpu_map__put(cpus);
+ perf_thread_map__put(threads);
+
+ return 0;
+
+out_delete_threads:
+ perf_thread_map__put(threads);
+ return -1;
+}
+
+int 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 evlist__set_tp_filter(struct evlist *evlist, const char *filter)
+{
+ struct evsel *evsel;
+ int err = 0;
+
+ if (filter == NULL)
+ return -1;
+
+ evlist__for_each_entry(evlist, evsel) {
+ if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT)
+ continue;
+
+ err = evsel__set_filter(evsel, filter);
+ if (err)
+ break;
+ }
+
+ return err;
+}
+
+int evlist__append_tp_filter(struct evlist *evlist, const char *filter)
+{
+ struct evsel *evsel;
+ int err = 0;
+
+ if (filter == NULL)
+ return -1;
+
+ evlist__for_each_entry(evlist, evsel) {
+ if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT)
+ continue;
+
+ err = evsel__append_tp_filter(evsel, filter);
+ if (err)
+ break;
+ }
+
+ return err;
+}
+
+char *asprintf__tp_filter_pids(size_t npids, pid_t *pids)
+{
+ char *filter;
+ size_t i;
+
+ for (i = 0; i < npids; ++i) {
+ if (i == 0) {
+ if (asprintf(&filter, "common_pid != %d", pids[i]) < 0)
+ return NULL;
+ } else {
+ char *tmp;
+
+ if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0)
+ goto out_free;
+
+ free(filter);
+ filter = tmp;
+ }
+ }
+
+ return filter;
+out_free:
+ free(filter);
+ return NULL;
+}
+
+int evlist__set_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids)
+{
+ char *filter = asprintf__tp_filter_pids(npids, pids);
+ int ret = evlist__set_tp_filter(evlist, filter);
+
+ free(filter);
+ return ret;
+}
+
+int evlist__set_tp_filter_pid(struct evlist *evlist, pid_t pid)
+{
+ return evlist__set_tp_filter_pids(evlist, 1, &pid);
+}
+
+int evlist__append_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids)
+{
+ char *filter = asprintf__tp_filter_pids(npids, pids);
+ int ret = evlist__append_tp_filter(evlist, filter);
+
+ free(filter);
+ return ret;
+}
+
+int evlist__append_tp_filter_pid(struct evlist *evlist, pid_t pid)
+{
+ return evlist__append_tp_filter_pids(evlist, 1, &pid);
+}
+
+bool 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 __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 evlist__combined_sample_type(struct evlist *evlist)
+{
+ evlist->combined_sample_type = 0;
+ return __evlist__combined_sample_type(evlist);
+}
+
+u64 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 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) {
+ pr_debug("Read format differs %#" PRIx64 " vs %#" PRIx64 "\n",
+ read_format, (u64)pos->core.attr.read_format);
+ }
+ }
+
+ /* PERF_SAMPLE_READ implies PERF_FORMAT_ID. */
+ if ((sample_type & PERF_SAMPLE_READ) &&
+ !(read_format & PERF_FORMAT_ID)) {
+ return false;
+ }
+
+ return true;
+}
+
+u16 evlist__id_hdr_size(struct evlist *evlist)
+{
+ struct evsel *first = evlist__first(evlist);
+
+ return first->core.attr.sample_id_all ? evsel__id_hdr_size(first) : 0;
+}
+
+bool 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 evlist__sample_id_all(struct evlist *evlist)
+{
+ struct evsel *first = evlist__first(evlist);
+ return first->core.attr.sample_id_all;
+}
+
+void evlist__set_selected(struct evlist *evlist, struct evsel *evsel)
+{
+ evlist->selected = evsel;
+}
+
+void evlist__close(struct evlist *evlist)
+{
+ struct evsel *evsel;
+ struct evlist_cpu_iterator evlist_cpu_itr;
+ struct affinity affinity;
+
+ /*
+ * With perf record core.user_requested_cpus is usually NULL.
+ * Use the old method to handle this for now.
+ */
+ if (!evlist->core.user_requested_cpus ||
+ cpu_map__is_dummy(evlist->core.user_requested_cpus)) {
+ evlist__for_each_entry_reverse(evlist, evsel)
+ evsel__close(evsel);
+ return;
+ }
+
+ if (affinity__setup(&affinity) < 0)
+ return;
+
+ evlist__for_each_cpu(evlist_cpu_itr, evlist, &affinity) {
+ perf_evsel__close_cpu(&evlist_cpu_itr.evsel->core,
+ evlist_cpu_itr.cpu_map_idx);
+ }
+
+ affinity__cleanup(&affinity);
+ evlist__for_each_entry_reverse(evlist, evsel) {
+ perf_evsel__free_fd(&evsel->core);
+ perf_evsel__free_id(&evsel->core);
+ }
+ perf_evlist__reset_id_hash(&evlist->core);
+}
+
+static int evlist__create_syswide_maps(struct evlist *evlist)
+{
+ struct perf_cpu_map *cpus;
+ struct perf_thread_map *threads;
+
+ /*
+ * 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);
+
+ perf_thread_map__put(threads);
+out_put:
+ perf_cpu_map__put(cpus);
+out:
+ return -ENOMEM;
+}
+
+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.user_requested_cpus == NULL) {
+ err = evlist__create_syswide_maps(evlist);
+ if (err < 0)
+ goto out_err;
+ }
+
+ 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 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);
+
+ /*
+ * Change the name of this process not to confuse --exclude-perf users
+ * that sees 'perf' in the window up to the execvp() and thinks that
+ * perf samples are not being excluded.
+ */
+ prctl(PR_SET_NAME, "perf-exec");
+
+ /*
+ * 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
+ * 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 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 evlist__parse_sample(struct evlist *evlist, union perf_event *event, struct perf_sample *sample)
+{
+ struct evsel *evsel = evlist__event2evsel(evlist, event);
+ int ret;
+
+ if (!evsel)
+ return -EFAULT;
+ ret = evsel__parse_sample(evsel, event, sample);
+ if (ret)
+ return ret;
+ if (perf_guest && sample->id) {
+ struct perf_sample_id *sid = evlist__id2sid(evlist, sample->id);
+
+ if (sid) {
+ sample->machine_pid = sid->machine_pid;
+ sample->vcpu = sid->vcpu.cpu;
+ }
+ }
+ return 0;
+}
+
+int evlist__parse_sample_timestamp(struct evlist *evlist, union perf_event *event, u64 *timestamp)
+{
+ struct evsel *evsel = evlist__event2evsel(evlist, event);
+
+ if (!evsel)
+ return -EFAULT;
+ return evsel__parse_sample_timestamp(evsel, event, timestamp);
+}
+
+int 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 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 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(evsel) == evsel__leader(move_evsel))
+ list_move_tail(&evsel->core.node, &move);
+ }
+
+ list_splice(&move, &evlist->core.entries);
+}
+
+struct evsel *evlist__get_tracking_event(struct evlist *evlist)
+{
+ struct evsel *evsel;
+
+ evlist__for_each_entry(evlist, evsel) {
+ if (evsel->tracking)
+ return evsel;
+ }
+
+ return evlist__first(evlist);
+}
+
+void 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 *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 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:
+ evlist__pause(evlist);
+ break;
+ case RESUME:
+ evlist__resume(evlist);
+ break;
+ case NONE:
+ default:
+ break;
+ }
+
+state_err:
+ return;
+}
+
+bool 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 evlist__force_leader(struct evlist *evlist)
+{
+ if (!evlist->core.nr_groups) {
+ struct evsel *leader = evlist__first(evlist);
+
+ evlist__set_leader(evlist);
+ leader->forced_leader = true;
+ }
+}
+
+struct evsel *evlist__reset_weak_group(struct evlist *evsel_list, struct evsel *evsel, bool close)
+{
+ struct evsel *c2, *leader;
+ bool is_open = true;
+
+ leader = evsel__leader(evsel);
+
+ 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 (evsel__has_leader(c2, leader)) {
+ if (is_open && close)
+ perf_evsel__close(&c2->core);
+ /*
+ * We want to close all members of the group and reopen
+ * them. Some events, like Intel topdown, require being
+ * in a group and so keep these in the group.
+ */
+ evsel__remove_from_group(c2, leader);
+
+ /*
+ * Set this for all former members of the group
+ * to indicate they get reopened.
+ */
+ c2->reset_group = true;
+ }
+ }
+ /* Reset the leader count if all entries were removed. */
+ if (leader->core.nr_members == 1)
+ leader->core.nr_members = 0;
+ return leader;
+}
+
+static int evlist__parse_control_fifo(const char *str, int *ctl_fd, int *ctl_fd_ack, bool *ctl_fd_close)
+{
+ char *s, *p;
+ int ret = 0, fd;
+
+ if (strncmp(str, "fifo:", 5))
+ return -EINVAL;
+
+ str += 5;
+ if (!*str || *str == ',')
+ return -EINVAL;
+
+ s = strdup(str);
+ if (!s)
+ return -ENOMEM;
+
+ p = strchr(s, ',');
+ if (p)
+ *p = '\0';
+
+ /*
+ * O_RDWR avoids POLLHUPs which is necessary to allow the other
+ * end of a FIFO to be repeatedly opened and closed.
+ */
+ fd = open(s, O_RDWR | O_NONBLOCK | O_CLOEXEC);
+ if (fd < 0) {
+ pr_err("Failed to open '%s'\n", s);
+ ret = -errno;
+ goto out_free;
+ }
+ *ctl_fd = fd;
+ *ctl_fd_close = true;
+
+ if (p && *++p) {
+ /* O_RDWR | O_NONBLOCK means the other end need not be open */
+ fd = open(p, O_RDWR | O_NONBLOCK | O_CLOEXEC);
+ if (fd < 0) {
+ pr_err("Failed to open '%s'\n", p);
+ ret = -errno;
+ goto out_free;
+ }
+ *ctl_fd_ack = fd;
+ }
+
+out_free:
+ free(s);
+ return ret;
+}
+
+int evlist__parse_control(const char *str, int *ctl_fd, int *ctl_fd_ack, bool *ctl_fd_close)
+{
+ char *comma = NULL, *endptr = NULL;
+
+ *ctl_fd_close = false;
+
+ if (strncmp(str, "fd:", 3))
+ return evlist__parse_control_fifo(str, ctl_fd, ctl_fd_ack, ctl_fd_close);
+
+ *ctl_fd = strtoul(&str[3], &endptr, 0);
+ if (endptr == &str[3])
+ return -EINVAL;
+
+ comma = strchr(str, ',');
+ if (comma) {
+ if (endptr != comma)
+ return -EINVAL;
+
+ *ctl_fd_ack = strtoul(comma + 1, &endptr, 0);
+ if (endptr == comma + 1 || *endptr != '\0')
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+void evlist__close_control(int ctl_fd, int ctl_fd_ack, bool *ctl_fd_close)
+{
+ if (*ctl_fd_close) {
+ *ctl_fd_close = false;
+ close(ctl_fd);
+ if (ctl_fd_ack >= 0)
+ close(ctl_fd_ack);
+ }
+}
+
+int evlist__initialize_ctlfd(struct evlist *evlist, int fd, int ack)
+{
+ if (fd == -1) {
+ pr_debug("Control descriptor is not initialized\n");
+ return 0;
+ }
+
+ evlist->ctl_fd.pos = perf_evlist__add_pollfd(&evlist->core, fd, NULL, POLLIN,
+ fdarray_flag__nonfilterable |
+ fdarray_flag__non_perf_event);
+ if (evlist->ctl_fd.pos < 0) {
+ evlist->ctl_fd.pos = -1;
+ pr_err("Failed to add ctl fd entry: %m\n");
+ return -1;
+ }
+
+ evlist->ctl_fd.fd = fd;
+ evlist->ctl_fd.ack = ack;
+
+ return 0;
+}
+
+bool evlist__ctlfd_initialized(struct evlist *evlist)
+{
+ return evlist->ctl_fd.pos >= 0;
+}
+
+int evlist__finalize_ctlfd(struct evlist *evlist)
+{
+ struct pollfd *entries = evlist->core.pollfd.entries;
+
+ if (!evlist__ctlfd_initialized(evlist))
+ return 0;
+
+ entries[evlist->ctl_fd.pos].fd = -1;
+ entries[evlist->ctl_fd.pos].events = 0;
+ entries[evlist->ctl_fd.pos].revents = 0;
+
+ evlist->ctl_fd.pos = -1;
+ evlist->ctl_fd.ack = -1;
+ evlist->ctl_fd.fd = -1;
+
+ return 0;
+}
+
+static int evlist__ctlfd_recv(struct evlist *evlist, enum evlist_ctl_cmd *cmd,
+ char *cmd_data, size_t data_size)
+{
+ int err;
+ char c;
+ size_t bytes_read = 0;
+
+ *cmd = EVLIST_CTL_CMD_UNSUPPORTED;
+ memset(cmd_data, 0, data_size);
+ data_size--;
+
+ do {
+ err = read(evlist->ctl_fd.fd, &c, 1);
+ if (err > 0) {
+ if (c == '\n' || c == '\0')
+ break;
+ cmd_data[bytes_read++] = c;
+ if (bytes_read == data_size)
+ break;
+ continue;
+ } else if (err == -1) {
+ if (errno == EINTR)
+ continue;
+ if (errno == EAGAIN || errno == EWOULDBLOCK)
+ err = 0;
+ else
+ pr_err("Failed to read from ctlfd %d: %m\n", evlist->ctl_fd.fd);
+ }
+ break;
+ } while (1);
+
+ pr_debug("Message from ctl_fd: \"%s%s\"\n", cmd_data,
+ bytes_read == data_size ? "" : c == '\n' ? "\\n" : "\\0");
+
+ if (bytes_read > 0) {
+ if (!strncmp(cmd_data, EVLIST_CTL_CMD_ENABLE_TAG,
+ (sizeof(EVLIST_CTL_CMD_ENABLE_TAG)-1))) {
+ *cmd = EVLIST_CTL_CMD_ENABLE;
+ } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_DISABLE_TAG,
+ (sizeof(EVLIST_CTL_CMD_DISABLE_TAG)-1))) {
+ *cmd = EVLIST_CTL_CMD_DISABLE;
+ } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_SNAPSHOT_TAG,
+ (sizeof(EVLIST_CTL_CMD_SNAPSHOT_TAG)-1))) {
+ *cmd = EVLIST_CTL_CMD_SNAPSHOT;
+ pr_debug("is snapshot\n");
+ } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_EVLIST_TAG,
+ (sizeof(EVLIST_CTL_CMD_EVLIST_TAG)-1))) {
+ *cmd = EVLIST_CTL_CMD_EVLIST;
+ } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_STOP_TAG,
+ (sizeof(EVLIST_CTL_CMD_STOP_TAG)-1))) {
+ *cmd = EVLIST_CTL_CMD_STOP;
+ } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_PING_TAG,
+ (sizeof(EVLIST_CTL_CMD_PING_TAG)-1))) {
+ *cmd = EVLIST_CTL_CMD_PING;
+ }
+ }
+
+ return bytes_read ? (int)bytes_read : err;
+}
+
+int evlist__ctlfd_ack(struct evlist *evlist)
+{
+ int err;
+
+ if (evlist->ctl_fd.ack == -1)
+ return 0;
+
+ err = write(evlist->ctl_fd.ack, EVLIST_CTL_CMD_ACK_TAG,
+ sizeof(EVLIST_CTL_CMD_ACK_TAG));
+ if (err == -1)
+ pr_err("failed to write to ctl_ack_fd %d: %m\n", evlist->ctl_fd.ack);
+
+ return err;
+}
+
+static int get_cmd_arg(char *cmd_data, size_t cmd_size, char **arg)
+{
+ char *data = cmd_data + cmd_size;
+
+ /* no argument */
+ if (!*data)
+ return 0;
+
+ /* there's argument */
+ if (*data == ' ') {
+ *arg = data + 1;
+ return 1;
+ }
+
+ /* malformed */
+ return -1;
+}
+
+static int evlist__ctlfd_enable(struct evlist *evlist, char *cmd_data, bool enable)
+{
+ struct evsel *evsel;
+ char *name;
+ int err;
+
+ err = get_cmd_arg(cmd_data,
+ enable ? sizeof(EVLIST_CTL_CMD_ENABLE_TAG) - 1 :
+ sizeof(EVLIST_CTL_CMD_DISABLE_TAG) - 1,
+ &name);
+ if (err < 0) {
+ pr_info("failed: wrong command\n");
+ return -1;
+ }
+
+ if (err) {
+ evsel = evlist__find_evsel_by_str(evlist, name);
+ if (evsel) {
+ if (enable)
+ evlist__enable_evsel(evlist, name);
+ else
+ evlist__disable_evsel(evlist, name);
+ pr_info("Event %s %s\n", evsel->name,
+ enable ? "enabled" : "disabled");
+ } else {
+ pr_info("failed: can't find '%s' event\n", name);
+ }
+ } else {
+ if (enable) {
+ evlist__enable(evlist);
+ pr_info(EVLIST_ENABLED_MSG);
+ } else {
+ evlist__disable(evlist);
+ pr_info(EVLIST_DISABLED_MSG);
+ }
+ }
+
+ return 0;
+}
+
+static int evlist__ctlfd_list(struct evlist *evlist, char *cmd_data)
+{
+ struct perf_attr_details details = { .verbose = false, };
+ struct evsel *evsel;
+ char *arg;
+ int err;
+
+ err = get_cmd_arg(cmd_data,
+ sizeof(EVLIST_CTL_CMD_EVLIST_TAG) - 1,
+ &arg);
+ if (err < 0) {
+ pr_info("failed: wrong command\n");
+ return -1;
+ }
+
+ if (err) {
+ if (!strcmp(arg, "-v")) {
+ details.verbose = true;
+ } else if (!strcmp(arg, "-g")) {
+ details.event_group = true;
+ } else if (!strcmp(arg, "-F")) {
+ details.freq = true;
+ } else {
+ pr_info("failed: wrong command\n");
+ return -1;
+ }
+ }
+
+ evlist__for_each_entry(evlist, evsel)
+ evsel__fprintf(evsel, &details, stderr);
+
+ return 0;
+}
+
+int evlist__ctlfd_process(struct evlist *evlist, enum evlist_ctl_cmd *cmd)
+{
+ int err = 0;
+ char cmd_data[EVLIST_CTL_CMD_MAX_LEN];
+ int ctlfd_pos = evlist->ctl_fd.pos;
+ struct pollfd *entries = evlist->core.pollfd.entries;
+
+ if (!evlist__ctlfd_initialized(evlist) || !entries[ctlfd_pos].revents)
+ return 0;
+
+ if (entries[ctlfd_pos].revents & POLLIN) {
+ err = evlist__ctlfd_recv(evlist, cmd, cmd_data,
+ EVLIST_CTL_CMD_MAX_LEN);
+ if (err > 0) {
+ switch (*cmd) {
+ case EVLIST_CTL_CMD_ENABLE:
+ case EVLIST_CTL_CMD_DISABLE:
+ err = evlist__ctlfd_enable(evlist, cmd_data,
+ *cmd == EVLIST_CTL_CMD_ENABLE);
+ break;
+ case EVLIST_CTL_CMD_EVLIST:
+ err = evlist__ctlfd_list(evlist, cmd_data);
+ break;
+ case EVLIST_CTL_CMD_SNAPSHOT:
+ case EVLIST_CTL_CMD_STOP:
+ case EVLIST_CTL_CMD_PING:
+ break;
+ case EVLIST_CTL_CMD_ACK:
+ case EVLIST_CTL_CMD_UNSUPPORTED:
+ default:
+ pr_debug("ctlfd: unsupported %d\n", *cmd);
+ break;
+ }
+ if (!(*cmd == EVLIST_CTL_CMD_ACK || *cmd == EVLIST_CTL_CMD_UNSUPPORTED ||
+ *cmd == EVLIST_CTL_CMD_SNAPSHOT))
+ evlist__ctlfd_ack(evlist);
+ }
+ }
+
+ if (entries[ctlfd_pos].revents & (POLLHUP | POLLERR))
+ evlist__finalize_ctlfd(evlist);
+ else
+ entries[ctlfd_pos].revents = 0;
+
+ return err;
+}
+
+/**
+ * struct event_enable_time - perf record -D/--delay single time range.
+ * @start: start of time range to enable events in milliseconds
+ * @end: end of time range to enable events in milliseconds
+ *
+ * N.B. this structure is also accessed as an array of int.
+ */
+struct event_enable_time {
+ int start;
+ int end;
+};
+
+static int parse_event_enable_time(const char *str, struct event_enable_time *range, bool first)
+{
+ const char *fmt = first ? "%u - %u %n" : " , %u - %u %n";
+ int ret, start, end, n;
+
+ ret = sscanf(str, fmt, &start, &end, &n);
+ if (ret != 2 || end <= start)
+ return -EINVAL;
+ if (range) {
+ range->start = start;
+ range->end = end;
+ }
+ return n;
+}
+
+static ssize_t parse_event_enable_times(const char *str, struct event_enable_time *range)
+{
+ int incr = !!range;
+ bool first = true;
+ ssize_t ret, cnt;
+
+ for (cnt = 0; *str; cnt++) {
+ ret = parse_event_enable_time(str, range, first);
+ if (ret < 0)
+ return ret;
+ /* Check no overlap */
+ if (!first && range && range->start <= range[-1].end)
+ return -EINVAL;
+ str += ret;
+ range += incr;
+ first = false;
+ }
+ return cnt;
+}
+
+/**
+ * struct event_enable_timer - control structure for perf record -D/--delay.
+ * @evlist: event list
+ * @times: time ranges that events are enabled (N.B. this is also accessed as an
+ * array of int)
+ * @times_cnt: number of time ranges
+ * @timerfd: timer file descriptor
+ * @pollfd_pos: position in @evlist array of file descriptors to poll (fdarray)
+ * @times_step: current position in (int *)@times)[],
+ * refer event_enable_timer__process()
+ *
+ * Note, this structure is only used when there are time ranges, not when there
+ * is only an initial delay.
+ */
+struct event_enable_timer {
+ struct evlist *evlist;
+ struct event_enable_time *times;
+ size_t times_cnt;
+ int timerfd;
+ int pollfd_pos;
+ size_t times_step;
+};
+
+static int str_to_delay(const char *str)
+{
+ char *endptr;
+ long d;
+
+ d = strtol(str, &endptr, 10);
+ if (*endptr || d > INT_MAX || d < -1)
+ return 0;
+ return d;
+}
+
+int evlist__parse_event_enable_time(struct evlist *evlist, struct record_opts *opts,
+ const char *str, int unset)
+{
+ enum fdarray_flags flags = fdarray_flag__nonfilterable | fdarray_flag__non_perf_event;
+ struct event_enable_timer *eet;
+ ssize_t times_cnt;
+ ssize_t ret;
+ int err;
+
+ if (unset)
+ return 0;
+
+ opts->initial_delay = str_to_delay(str);
+ if (opts->initial_delay)
+ return 0;
+
+ ret = parse_event_enable_times(str, NULL);
+ if (ret < 0)
+ return ret;
+
+ times_cnt = ret;
+ if (times_cnt == 0)
+ return -EINVAL;
+
+ eet = zalloc(sizeof(*eet));
+ if (!eet)
+ return -ENOMEM;
+
+ eet->times = calloc(times_cnt, sizeof(*eet->times));
+ if (!eet->times) {
+ err = -ENOMEM;
+ goto free_eet;
+ }
+
+ if (parse_event_enable_times(str, eet->times) != times_cnt) {
+ err = -EINVAL;
+ goto free_eet_times;
+ }
+
+ eet->times_cnt = times_cnt;
+
+ eet->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC);
+ if (eet->timerfd == -1) {
+ err = -errno;
+ pr_err("timerfd_create failed: %s\n", strerror(errno));
+ goto free_eet_times;
+ }
+
+ eet->pollfd_pos = perf_evlist__add_pollfd(&evlist->core, eet->timerfd, NULL, POLLIN, flags);
+ if (eet->pollfd_pos < 0) {
+ err = eet->pollfd_pos;
+ goto close_timerfd;
+ }
+
+ eet->evlist = evlist;
+ evlist->eet = eet;
+ opts->initial_delay = eet->times[0].start;
+
+ return 0;
+
+close_timerfd:
+ close(eet->timerfd);
+free_eet_times:
+ free(eet->times);
+free_eet:
+ free(eet);
+ return err;
+}
+
+static int event_enable_timer__set_timer(struct event_enable_timer *eet, int ms)
+{
+ struct itimerspec its = {
+ .it_value.tv_sec = ms / MSEC_PER_SEC,
+ .it_value.tv_nsec = (ms % MSEC_PER_SEC) * NSEC_PER_MSEC,
+ };
+ int err = 0;
+
+ if (timerfd_settime(eet->timerfd, 0, &its, NULL) < 0) {
+ err = -errno;
+ pr_err("timerfd_settime failed: %s\n", strerror(errno));
+ }
+ return err;
+}
+
+int event_enable_timer__start(struct event_enable_timer *eet)
+{
+ int ms;
+
+ if (!eet)
+ return 0;
+
+ ms = eet->times[0].end - eet->times[0].start;
+ eet->times_step = 1;
+
+ return event_enable_timer__set_timer(eet, ms);
+}
+
+int event_enable_timer__process(struct event_enable_timer *eet)
+{
+ struct pollfd *entries;
+ short revents;
+
+ if (!eet)
+ return 0;
+
+ entries = eet->evlist->core.pollfd.entries;
+ revents = entries[eet->pollfd_pos].revents;
+ entries[eet->pollfd_pos].revents = 0;
+
+ if (revents & POLLIN) {
+ size_t step = eet->times_step;
+ size_t pos = step / 2;
+
+ if (step & 1) {
+ evlist__disable_non_dummy(eet->evlist);
+ pr_info(EVLIST_DISABLED_MSG);
+ if (pos >= eet->times_cnt - 1) {
+ /* Disarm timer */
+ event_enable_timer__set_timer(eet, 0);
+ return 1; /* Stop */
+ }
+ } else {
+ evlist__enable_non_dummy(eet->evlist);
+ pr_info(EVLIST_ENABLED_MSG);
+ }
+
+ step += 1;
+ pos = step / 2;
+
+ if (pos < eet->times_cnt) {
+ int *times = (int *)eet->times; /* Accessing 'times' as array of int */
+ int ms = times[step] - times[step - 1];
+
+ eet->times_step = step;
+ return event_enable_timer__set_timer(eet, ms);
+ }
+ }
+
+ return 0;
+}
+
+void event_enable_timer__exit(struct event_enable_timer **ep)
+{
+ if (!ep || !*ep)
+ return;
+ free((*ep)->times);
+ zfree(ep);
+}
+
+struct evsel *evlist__find_evsel(struct evlist *evlist, int idx)
+{
+ struct evsel *evsel;
+
+ evlist__for_each_entry(evlist, evsel) {
+ if (evsel->core.idx == idx)
+ return evsel;
+ }
+ return NULL;
+}
+
+int evlist__scnprintf_evsels(struct evlist *evlist, size_t size, char *bf)
+{
+ struct evsel *evsel;
+ int printed = 0;
+
+ evlist__for_each_entry(evlist, evsel) {
+ if (evsel__is_dummy_event(evsel))
+ continue;
+ if (size > (strlen(evsel__name(evsel)) + (printed ? 2 : 1))) {
+ printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "," : "", evsel__name(evsel));
+ } else {
+ printed += scnprintf(bf + printed, size - printed, "%s...", printed ? "," : "");
+ break;
+ }
+ }
+
+ return printed;
+}
+
+void evlist__check_mem_load_aux(struct evlist *evlist)
+{
+ struct evsel *leader, *evsel, *pos;
+
+ /*
+ * For some platforms, the 'mem-loads' event is required to use
+ * together with 'mem-loads-aux' within a group and 'mem-loads-aux'
+ * must be the group leader. Now we disable this group before reporting
+ * because 'mem-loads-aux' is just an auxiliary event. It doesn't carry
+ * any valid memory load information.
+ */
+ evlist__for_each_entry(evlist, evsel) {
+ leader = evsel__leader(evsel);
+ if (leader == evsel)
+ continue;
+
+ if (leader->name && strstr(leader->name, "mem-loads-aux")) {
+ for_each_group_evsel(pos, leader) {
+ evsel__set_leader(pos, pos);
+ pos->core.nr_members = 0;
+ }
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 04:02:56 +0000