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builtin-report.c
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// SPDX-License-Identifier: GPL-2.0
/*
* builtin-report.c
*
* Builtin report command: Analyze the perf.data input file,
* look up and read DSOs and symbol information and display
* a histogram of results, along various sorting keys.
*/
#include "builtin.h"
#include "util/config.h"
#include "util/annotate.h"
#include "util/color.h"
#include "util/dso.h"
#include <linux/list.h>
#include <linux/rbtree.h>
#include <linux/err.h>
#include <linux/zalloc.h>
#include "util/map.h"
#include "util/symbol.h"
#include "util/map_symbol.h"
#include "util/mem-events.h"
#include "util/branch.h"
#include "util/callchain.h"
#include "util/values.h"
#include "perf.h"
#include "util/debug.h"
#include "util/evlist.h"
#include "util/evsel.h"
#include "util/evswitch.h"
#include "util/header.h"
#include "util/session.h"
#include "util/srcline.h"
#include "util/tool.h"
#include <subcmd/parse-options.h>
#include <subcmd/exec-cmd.h>
#include "util/parse-events.h"
#include "util/thread.h"
#include "util/sort.h"
#include "util/hist.h"
#include "util/data.h"
#include "arch/common.h"
#include "util/time-utils.h"
#include "util/auxtrace.h"
#include "util/units.h"
#include "util/util.h" // perf_tip()
#include "ui/ui.h"
#include "ui/progress.h"
#include "util/block-info.h"
#include <dlfcn.h>
#include <errno.h>
#include <inttypes.h>
#include <regex.h>
#include <linux/ctype.h>
#include <signal.h>
#include <linux/bitmap.h>
#include <linux/string.h>
#include <linux/stringify.h>
#include <linux/time64.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <linux/mman.h>
struct report {
struct perf_tool tool;
struct perf_session *session;
struct evswitch evswitch;
#ifdef HAVE_SLANG_SUPPORT
bool use_tui;
#endif
#ifdef HAVE_GTK2_SUPPORT
bool use_gtk;
#endif
bool use_stdio;
bool show_full_info;
bool show_threads;
bool inverted_callchain;
bool mem_mode;
bool stats_mode;
bool tasks_mode;
bool mmaps_mode;
bool header;
bool header_only;
bool nonany_branch_mode;
bool group_set;
bool stitch_lbr;
bool disable_order;
bool skip_empty;
int max_stack;
struct perf_read_values show_threads_values;
struct annotation_options annotation_opts;
const char *pretty_printing_style;
const char *cpu_list;
const char *symbol_filter_str;
const char *time_str;
struct perf_time_interval *ptime_range;
int range_size;
int range_num;
float min_percent;
u64 nr_entries;
u64 queue_size;
u64 total_cycles;
int socket_filter;
DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
struct branch_type_stat brtype_stat;
bool symbol_ipc;
bool total_cycles_mode;
struct block_report *block_reports;
int nr_block_reports;
};
static int report__config(const char *var, const char *value, void *cb)
{
struct report *rep = cb;
if (!strcmp(var, "report.group")) {
symbol_conf.event_group = perf_config_bool(var, value);
return 0;
}
if (!strcmp(var, "report.percent-limit")) {
double pcnt = strtof(value, NULL);
rep->min_percent = pcnt;
callchain_param.min_percent = pcnt;
return 0;
}
if (!strcmp(var, "report.children")) {
symbol_conf.cumulate_callchain = perf_config_bool(var, value);
return 0;
}
if (!strcmp(var, "report.queue-size"))
return perf_config_u64(&rep->queue_size, var, value);
if (!strcmp(var, "report.sort_order")) {
default_sort_order = strdup(value);
return 0;
}
if (!strcmp(var, "report.skip-empty")) {
rep->skip_empty = perf_config_bool(var, value);
return 0;
}
return 0;
}
static int hist_iter__report_callback(struct hist_entry_iter *iter,
struct addr_location *al, bool single,
void *arg)
{
int err = 0;
struct report *rep = arg;
struct hist_entry *he = iter->he;
struct evsel *evsel = iter->evsel;
struct perf_sample *sample = iter->sample;
struct mem_info *mi;
struct branch_info *bi;
if (!ui__has_annotation() && !rep->symbol_ipc)
return 0;
if (sort__mode == SORT_MODE__BRANCH) {
bi = he->branch_info;
err = addr_map_symbol__inc_samples(&bi->from, sample, evsel);
if (err)
goto out;
err = addr_map_symbol__inc_samples(&bi->to, sample, evsel);
} else if (rep->mem_mode) {
mi = he->mem_info;
err = addr_map_symbol__inc_samples(&mi->daddr, sample, evsel);
if (err)
goto out;
err = hist_entry__inc_addr_samples(he, sample, evsel, al->addr);
} else if (symbol_conf.cumulate_callchain) {
if (single)
err = hist_entry__inc_addr_samples(he, sample, evsel, al->addr);
} else {
err = hist_entry__inc_addr_samples(he, sample, evsel, al->addr);
}
out:
return err;
}
static int hist_iter__branch_callback(struct hist_entry_iter *iter,
struct addr_location *al __maybe_unused,
bool single __maybe_unused,
void *arg)
{
struct hist_entry *he = iter->he;
struct report *rep = arg;
struct branch_info *bi = he->branch_info;
struct perf_sample *sample = iter->sample;
struct evsel *evsel = iter->evsel;
int err;
branch_type_count(&rep->brtype_stat, &bi->flags,
bi->from.addr, bi->to.addr);
if (!ui__has_annotation() && !rep->symbol_ipc)
return 0;
err = addr_map_symbol__inc_samples(&bi->from, sample, evsel);
if (err)
goto out;
err = addr_map_symbol__inc_samples(&bi->to, sample, evsel);
out:
return err;
}
static void setup_forced_leader(struct report *report,
struct evlist *evlist)
{
if (report->group_set)
evlist__force_leader(evlist);
}
static int process_feature_event(struct perf_session *session,
union perf_event *event)
{
struct report *rep = container_of(session->tool, struct report, tool);
if (event->feat.feat_id < HEADER_LAST_FEATURE)
return perf_event__process_feature(session, event);
if (event->feat.feat_id != HEADER_LAST_FEATURE) {
pr_err("failed: wrong feature ID: %" PRI_lu64 "\n",
event->feat.feat_id);
return -1;
} else if (rep->header_only) {
session_done = 1;
}
/*
* (feat_id = HEADER_LAST_FEATURE) is the end marker which
* means all features are received, now we can force the
* group if needed.
*/
setup_forced_leader(rep, session->evlist);
return 0;
}
static int process_sample_event(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct evsel *evsel,
struct machine *machine)
{
struct report *rep = container_of(tool, struct report, tool);
struct addr_location al;
struct hist_entry_iter iter = {
.evsel = evsel,
.sample = sample,
.hide_unresolved = symbol_conf.hide_unresolved,
.add_entry_cb = hist_iter__report_callback,
};
int ret = 0;
if (perf_time__ranges_skip_sample(rep->ptime_range, rep->range_num,
sample->time)) {
return 0;
}
if (evswitch__discard(&rep->evswitch, evsel))
return 0;
if (machine__resolve(machine, &al, sample) < 0) {
pr_debug("problem processing %d event, skipping it.\n",
event->header.type);
return -1;
}
if (rep->stitch_lbr)
al.thread->lbr_stitch_enable = true;
if (symbol_conf.hide_unresolved && al.sym == NULL)
goto out_put;
if (rep->cpu_list && !test_bit(sample->cpu, rep->cpu_bitmap))
goto out_put;
if (sort__mode == SORT_MODE__BRANCH) {
/*
* A non-synthesized event might not have a branch stack if
* branch stacks have been synthesized (using itrace options).
*/
if (!sample->branch_stack)
goto out_put;
iter.add_entry_cb = hist_iter__branch_callback;
iter.ops = &hist_iter_branch;
} else if (rep->mem_mode) {
iter.ops = &hist_iter_mem;
} else if (symbol_conf.cumulate_callchain) {
iter.ops = &hist_iter_cumulative;
} else {
iter.ops = &hist_iter_normal;
}
if (al.map != NULL)
al.map->dso->hit = 1;
if (ui__has_annotation() || rep->symbol_ipc || rep->total_cycles_mode) {
hist__account_cycles(sample->branch_stack, &al, sample,
rep->nonany_branch_mode,
&rep->total_cycles);
}
ret = hist_entry_iter__add(&iter, &al, rep->max_stack, rep);
if (ret < 0)
pr_debug("problem adding hist entry, skipping event\n");
out_put:
addr_location__put(&al);
return ret;
}
static int process_read_event(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample __maybe_unused,
struct evsel *evsel,
struct machine *machine __maybe_unused)
{
struct report *rep = container_of(tool, struct report, tool);
if (rep->show_threads) {
const char *name = evsel__name(evsel);
int err = perf_read_values_add_value(&rep->show_threads_values,
event->read.pid, event->read.tid,
evsel->core.idx,
name,
event->read.value);
if (err)
return err;
}
return 0;
}
/* For pipe mode, sample_type is not currently set */
static int report__setup_sample_type(struct report *rep)
{
struct perf_session *session = rep->session;
u64 sample_type = evlist__combined_sample_type(session->evlist);
bool is_pipe = perf_data__is_pipe(session->data);
struct evsel *evsel;
if (session->itrace_synth_opts->callchain ||
session->itrace_synth_opts->add_callchain ||
(!is_pipe &&
perf_header__has_feat(&session->header, HEADER_AUXTRACE) &&
!session->itrace_synth_opts->set))
sample_type |= PERF_SAMPLE_CALLCHAIN;
if (session->itrace_synth_opts->last_branch ||
session->itrace_synth_opts->add_last_branch)
sample_type |= PERF_SAMPLE_BRANCH_STACK;
if (!is_pipe && !(sample_type & PERF_SAMPLE_CALLCHAIN)) {
if (perf_hpp_list.parent) {
ui__error("Selected --sort parent, but no "
"callchain data. Did you call "
"'perf record' without -g?\n");
return -EINVAL;
}
if (symbol_conf.use_callchain &&
!symbol_conf.show_branchflag_count) {
ui__error("Selected -g or --branch-history.\n"
"But no callchain or branch data.\n"
"Did you call 'perf record' without -g or -b?\n");
return -1;
}
} else if (!callchain_param.enabled &&
callchain_param.mode != CHAIN_NONE &&
!symbol_conf.use_callchain) {
symbol_conf.use_callchain = true;
if (callchain_register_param(&callchain_param) < 0) {
ui__error("Can't register callchain params.\n");
return -EINVAL;
}
}
if (symbol_conf.cumulate_callchain) {
/* Silently ignore if callchain is missing */
if (!(sample_type & PERF_SAMPLE_CALLCHAIN)) {
symbol_conf.cumulate_callchain = false;
perf_hpp__cancel_cumulate();
}
}
if (sort__mode == SORT_MODE__BRANCH) {
if (!is_pipe &&
!(sample_type & PERF_SAMPLE_BRANCH_STACK)) {
ui__error("Selected -b but no branch data. "
"Did you call perf record without -b?\n");
return -1;
}
}
if (sort__mode == SORT_MODE__MEMORY) {
/*
* FIXUP: prior to kernel 5.18, Arm SPE missed to set
* PERF_SAMPLE_DATA_SRC bit in sample type. For backward
* compatibility, set the bit if it's an old perf data file.
*/
evlist__for_each_entry(session->evlist, evsel) {
if (strstr(evsel->name, "arm_spe") &&
!(sample_type & PERF_SAMPLE_DATA_SRC)) {
evsel->core.attr.sample_type |= PERF_SAMPLE_DATA_SRC;
sample_type |= PERF_SAMPLE_DATA_SRC;
}
}
if (!is_pipe && !(sample_type & PERF_SAMPLE_DATA_SRC)) {
ui__error("Selected --mem-mode but no mem data. "
"Did you call perf record without -d?\n");
return -1;
}
}
callchain_param_setup(sample_type, perf_env__arch(&rep->session->header.env));
if (rep->stitch_lbr && (callchain_param.record_mode != CALLCHAIN_LBR)) {
ui__warning("Can't find LBR callchain. Switch off --stitch-lbr.\n"
"Please apply --call-graph lbr when recording.\n");
rep->stitch_lbr = false;
}
/* ??? handle more cases than just ANY? */
if (!(evlist__combined_branch_type(session->evlist) & PERF_SAMPLE_BRANCH_ANY))
rep->nonany_branch_mode = true;
#if !defined(HAVE_LIBUNWIND_SUPPORT) && !defined(HAVE_DWARF_SUPPORT)
if (dwarf_callchain_users) {
ui__warning("Please install libunwind or libdw "
"development packages during the perf build.\n");
}
#endif
return 0;
}
static void sig_handler(int sig __maybe_unused)
{
session_done = 1;
}
static size_t hists__fprintf_nr_sample_events(struct hists *hists, struct report *rep,
const char *evname, FILE *fp)
{
size_t ret;
char unit;
unsigned long nr_samples = hists->stats.nr_samples;
u64 nr_events = hists->stats.total_period;
struct evsel *evsel = hists_to_evsel(hists);
char buf[512];
size_t size = sizeof(buf);
int socked_id = hists->socket_filter;
if (quiet)
return 0;
if (symbol_conf.filter_relative) {
nr_samples = hists->stats.nr_non_filtered_samples;
nr_events = hists->stats.total_non_filtered_period;
}
if (evsel__is_group_event(evsel)) {
struct evsel *pos;
evsel__group_desc(evsel, buf, size);
evname = buf;
for_each_group_member(pos, evsel) {
const struct hists *pos_hists = evsel__hists(pos);
if (symbol_conf.filter_relative) {
nr_samples += pos_hists->stats.nr_non_filtered_samples;
nr_events += pos_hists->stats.total_non_filtered_period;
} else {
nr_samples += pos_hists->stats.nr_samples;
nr_events += pos_hists->stats.total_period;
}
}
}
nr_samples = convert_unit(nr_samples, &unit);
ret = fprintf(fp, "# Samples: %lu%c", nr_samples, unit);
if (evname != NULL) {
ret += fprintf(fp, " of event%s '%s'",
evsel->core.nr_members > 1 ? "s" : "", evname);
}
if (rep->time_str)
ret += fprintf(fp, " (time slices: %s)", rep->time_str);
if (symbol_conf.show_ref_callgraph && evname && strstr(evname, "call-graph=no")) {
ret += fprintf(fp, ", show reference callgraph");
}
if (rep->mem_mode) {
ret += fprintf(fp, "\n# Total weight : %" PRIu64, nr_events);
ret += fprintf(fp, "\n# Sort order : %s", sort_order ? : default_mem_sort_order);
} else
ret += fprintf(fp, "\n# Event count (approx.): %" PRIu64, nr_events);
if (socked_id > -1)
ret += fprintf(fp, "\n# Processor Socket: %d", socked_id);
return ret + fprintf(fp, "\n#\n");
}
static int evlist__tui_block_hists_browse(struct evlist *evlist, struct report *rep)
{
struct evsel *pos;
int i = 0, ret;
evlist__for_each_entry(evlist, pos) {
ret = report__browse_block_hists(&rep->block_reports[i++].hist,
rep->min_percent, pos,
&rep->session->header.env,
&rep->annotation_opts);
if (ret != 0)
return ret;
}
return 0;
}
static int evlist__tty_browse_hists(struct evlist *evlist, struct report *rep, const char *help)
{
struct evsel *pos;
int i = 0;
if (!quiet) {
fprintf(stdout, "#\n# Total Lost Samples: %" PRIu64 "\n#\n",
evlist->stats.total_lost_samples);
}
evlist__for_each_entry(evlist, pos) {
struct hists *hists = evsel__hists(pos);
const char *evname = evsel__name(pos);
if (symbol_conf.event_group && !evsel__is_group_leader(pos))
continue;
if (rep->skip_empty && !hists->stats.nr_samples)
continue;
hists__fprintf_nr_sample_events(hists, rep, evname, stdout);
if (rep->total_cycles_mode) {
report__browse_block_hists(&rep->block_reports[i++].hist,
rep->min_percent, pos,
NULL, NULL);
continue;
}
hists__fprintf(hists, !quiet, 0, 0, rep->min_percent, stdout,
!(symbol_conf.use_callchain ||
symbol_conf.show_branchflag_count));
fprintf(stdout, "\n\n");
}
if (!quiet)
fprintf(stdout, "#\n# (%s)\n#\n", help);
if (rep->show_threads) {
bool style = !strcmp(rep->pretty_printing_style, "raw");
perf_read_values_display(stdout, &rep->show_threads_values,
style);
perf_read_values_destroy(&rep->show_threads_values);
}
if (sort__mode == SORT_MODE__BRANCH)
branch_type_stat_display(stdout, &rep->brtype_stat);
return 0;
}
static void report__warn_kptr_restrict(const struct report *rep)
{
struct map *kernel_map = machine__kernel_map(&rep->session->machines.host);
struct kmap *kernel_kmap = kernel_map ? map__kmap(kernel_map) : NULL;
if (evlist__exclude_kernel(rep->session->evlist))
return;
if (kernel_map == NULL ||
(kernel_map->dso->hit &&
(kernel_kmap->ref_reloc_sym == NULL ||
kernel_kmap->ref_reloc_sym->addr == 0))) {
const char *desc =
"As no suitable kallsyms nor vmlinux was found, kernel samples\n"
"can't be resolved.";
if (kernel_map && map__has_symbols(kernel_map)) {
desc = "If some relocation was applied (e.g. "
"kexec) symbols may be misresolved.";
}
ui__warning(
"Kernel address maps (/proc/{kallsyms,modules}) were restricted.\n\n"
"Check /proc/sys/kernel/kptr_restrict before running 'perf record'.\n\n%s\n\n"
"Samples in kernel modules can't be resolved as well.\n\n",
desc);
}
}
static int report__gtk_browse_hists(struct report *rep, const char *help)
{
int (*hist_browser)(struct evlist *evlist, const char *help,
struct hist_browser_timer *timer, float min_pcnt);
hist_browser = dlsym(perf_gtk_handle, "evlist__gtk_browse_hists");
if (hist_browser == NULL) {
ui__error("GTK browser not found!\n");
return -1;
}
return hist_browser(rep->session->evlist, help, NULL, rep->min_percent);
}
static int report__browse_hists(struct report *rep)
{
int ret;
struct perf_session *session = rep->session;
struct evlist *evlist = session->evlist;
char *help = NULL, *path = NULL;
path = system_path(TIPDIR);
if (perf_tip(&help, path) || help == NULL) {
/* fallback for people who don't install perf ;-) */
free(path);
path = system_path(DOCDIR);
if (perf_tip(&help, path) || help == NULL)
help = strdup("Cannot load tips.txt file, please install perf!");
}
free(path);
switch (use_browser) {
case 1:
if (rep->total_cycles_mode) {
ret = evlist__tui_block_hists_browse(evlist, rep);
break;
}
ret = evlist__tui_browse_hists(evlist, help, NULL, rep->min_percent,
&session->header.env, true, &rep->annotation_opts);
/*
* Usually "ret" is the last pressed key, and we only
* care if the key notifies us to switch data file.
*/
if (ret != K_SWITCH_INPUT_DATA && ret != K_RELOAD)
ret = 0;
break;
case 2:
ret = report__gtk_browse_hists(rep, help);
break;
default:
ret = evlist__tty_browse_hists(evlist, rep, help);
break;
}
free(help);
return ret;
}
static int report__collapse_hists(struct report *rep)
{
struct ui_progress prog;
struct evsel *pos;
int ret = 0;
ui_progress__init(&prog, rep->nr_entries, "Merging related events...");
evlist__for_each_entry(rep->session->evlist, pos) {
struct hists *hists = evsel__hists(pos);
if (pos->core.idx == 0)
hists->symbol_filter_str = rep->symbol_filter_str;
hists->socket_filter = rep->socket_filter;
ret = hists__collapse_resort(hists, &prog);
if (ret < 0)
break;
/* Non-group events are considered as leader */
if (symbol_conf.event_group && !evsel__is_group_leader(pos)) {
struct hists *leader_hists = evsel__hists(evsel__leader(pos));
hists__match(leader_hists, hists);
hists__link(leader_hists, hists);
}
}
ui_progress__finish();
return ret;
}
static int hists__resort_cb(struct hist_entry *he, void *arg)
{
struct report *rep = arg;
struct symbol *sym = he->ms.sym;
if (rep->symbol_ipc && sym && !sym->annotate2) {
struct evsel *evsel = hists_to_evsel(he->hists);
symbol__annotate2(&he->ms, evsel,
&annotation__default_options, NULL);
}
return 0;
}
static void report__output_resort(struct report *rep)
{
struct ui_progress prog;
struct evsel *pos;
ui_progress__init(&prog, rep->nr_entries, "Sorting events for output...");
evlist__for_each_entry(rep->session->evlist, pos) {
evsel__output_resort_cb(pos, &prog, hists__resort_cb, rep);
}
ui_progress__finish();
}
static int count_sample_event(struct perf_tool *tool __maybe_unused,
union perf_event *event __maybe_unused,
struct perf_sample *sample __maybe_unused,
struct evsel *evsel,
struct machine *machine __maybe_unused)
{
struct hists *hists = evsel__hists(evsel);
hists__inc_nr_events(hists);
return 0;
}
static int process_attr(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct evlist **pevlist);
static void stats_setup(struct report *rep)
{
memset(&rep->tool, 0, sizeof(rep->tool));
rep->tool.attr = process_attr;
rep->tool.sample = count_sample_event;
rep->tool.no_warn = true;
}
static int stats_print(struct report *rep)
{
struct perf_session *session = rep->session;
perf_session__fprintf_nr_events(session, stdout, rep->skip_empty);
evlist__fprintf_nr_events(session->evlist, stdout, rep->skip_empty);
return 0;
}
static void tasks_setup(struct report *rep)
{
memset(&rep->tool, 0, sizeof(rep->tool));
rep->tool.ordered_events = true;
if (rep->mmaps_mode) {
rep->tool.mmap = perf_event__process_mmap;
rep->tool.mmap2 = perf_event__process_mmap2;
}
rep->tool.attr = process_attr;
rep->tool.comm = perf_event__process_comm;
rep->tool.exit = perf_event__process_exit;
rep->tool.fork = perf_event__process_fork;
rep->tool.no_warn = true;
}
struct task {
struct thread *thread;
struct list_head list;
struct list_head children;
};
static struct task *tasks_list(struct task *task, struct machine *machine)
{
struct thread *parent_thread, *thread = task->thread;
struct task *parent_task;
/* Already listed. */
if (!list_empty(&task->list))
return NULL;
/* Last one in the chain. */
if (thread->ppid == -1)
return task;
parent_thread = machine__find_thread(machine, -1, thread->ppid);
if (!parent_thread)
return ERR_PTR(-ENOENT);
parent_task = thread__priv(parent_thread);
list_add_tail(&task->list, &parent_task->children);
return tasks_list(parent_task, machine);
}
static size_t maps__fprintf_task(struct maps *maps, int indent, FILE *fp)
{
size_t printed = 0;
struct map *map;
maps__for_each_entry(maps, map) {
printed += fprintf(fp, "%*s %" PRIx64 "-%" PRIx64 " %c%c%c%c %08" PRIx64 " %" PRIu64 " %s\n",
indent, "", map->start, map->end,
map->prot & PROT_READ ? 'r' : '-',
map->prot & PROT_WRITE ? 'w' : '-',
map->prot & PROT_EXEC ? 'x' : '-',
map->flags & MAP_SHARED ? 's' : 'p',
map->pgoff,
map->dso->id.ino, map->dso->name);
}
return printed;
}
static void task__print_level(struct task *task, FILE *fp, int level)
{
struct thread *thread = task->thread;
struct task *child;
int comm_indent = fprintf(fp, " %8d %8d %8d |%*s",
thread->pid_, thread->tid, thread->ppid,
level, "");
fprintf(fp, "%s\n", thread__comm_str(thread));
maps__fprintf_task(thread->maps, comm_indent, fp);
if (!list_empty(&task->children)) {
list_for_each_entry(child, &task->children, list)
task__print_level(child, fp, level + 1);
}
}
static int tasks_print(struct report *rep, FILE *fp)
{
struct perf_session *session = rep->session;
struct machine *machine = &session->machines.host;
struct task *tasks, *task;
unsigned int nr = 0, itask = 0, i;
struct rb_node *nd;
LIST_HEAD(list);
/*
* No locking needed while accessing machine->threads,
* because --tasks is single threaded command.
*/
/* Count all the threads. */
for (i = 0; i < THREADS__TABLE_SIZE; i++)
nr += machine->threads[i].nr;
tasks = malloc(sizeof(*tasks) * nr);
if (!tasks)
return -ENOMEM;
for (i = 0; i < THREADS__TABLE_SIZE; i++) {
struct threads *threads = &machine->threads[i];
for (nd = rb_first_cached(&threads->entries); nd;
nd = rb_next(nd)) {
task = tasks + itask++;
task->thread = rb_entry(nd, struct thread, rb_node);
INIT_LIST_HEAD(&task->children);
INIT_LIST_HEAD(&task->list);
thread__set_priv(task->thread, task);
}
}
/*
* Iterate every task down to the unprocessed parent
* and link all in task children list. Task with no
* parent is added into 'list'.
*/
for (itask = 0; itask < nr; itask++) {
task = tasks + itask;
if (!list_empty(&task->list))
continue;
task = tasks_list(task, machine);
if (IS_ERR(task)) {
pr_err("Error: failed to process tasks\n");
free(tasks);
return PTR_ERR(task);
}
if (task)
list_add_tail(&task->list, &list);
}
fprintf(fp, "# %8s %8s %8s %s\n", "pid", "tid", "ppid", "comm");
list_for_each_entry(task, &list, list)
task__print_level(task, fp, 0);
free(tasks);
return 0;
}
static int __cmd_report(struct report *rep)
{
int ret;
struct perf_session *session = rep->session;
struct evsel *pos;
struct perf_data *data = session->data;
signal(SIGINT, sig_handler);
if (rep->cpu_list) {
ret = perf_session__cpu_bitmap(session, rep->cpu_list,
rep->cpu_bitmap);
if (ret) {
ui__error("failed to set cpu bitmap\n");
return ret;
}
session->itrace_synth_opts->cpu_bitmap = rep->cpu_bitmap;
}
if (rep->show_threads) {
ret = perf_read_values_init(&rep->show_threads_values);
if (ret)
return ret;
}
ret = report__setup_sample_type(rep);
if (ret) {
/* report__setup_sample_type() already showed error message */
return ret;
}
if (rep->stats_mode)
stats_setup(rep);
if (rep->tasks_mode)
tasks_setup(rep);
ret = perf_session__process_events(session);
if (ret) {
ui__error("failed to process sample\n");
return ret;
}
evlist__check_mem_load_aux(session->evlist);
if (rep->stats_mode)
return stats_print(rep);
if (rep->tasks_mode)
return tasks_print(rep, stdout);
report__warn_kptr_restrict(rep);
evlist__for_each_entry(session->evlist, pos)
rep->nr_entries += evsel__hists(pos)->nr_entries;
if (use_browser == 0) {
if (verbose > 3)
perf_session__fprintf(session, stdout);
if (verbose > 2)
perf_session__fprintf_dsos(session, stdout);
if (dump_trace) {
perf_session__fprintf_nr_events(session, stdout,
rep->skip_empty);
evlist__fprintf_nr_events(session->evlist, stdout,
rep->skip_empty);
return 0;
}
}
ret = report__collapse_hists(rep);
if (ret) {
ui__error("failed to process hist entry\n");
return ret;
}