summaryrefslogtreecommitdiffstats
path: root/tools/perf/builtin-top.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--tools/perf/builtin-top.c1791
1 files changed, 1791 insertions, 0 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
new file mode 100644
index 000000000..f9917848c
--- /dev/null
+++ b/tools/perf/builtin-top.c
@@ -0,0 +1,1791 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * builtin-top.c
+ *
+ * Builtin top command: Display a continuously updated profile of
+ * any workload, CPU or specific PID.
+ *
+ * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
+ * 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
+ *
+ * Improvements and fixes by:
+ *
+ * Arjan van de Ven <arjan@linux.intel.com>
+ * Yanmin Zhang <yanmin.zhang@intel.com>
+ * Wu Fengguang <fengguang.wu@intel.com>
+ * Mike Galbraith <efault@gmx.de>
+ * Paul Mackerras <paulus@samba.org>
+ */
+#include "builtin.h"
+
+#include "perf.h"
+
+#include "util/annotate.h"
+#include "util/bpf-event.h"
+#include "util/cgroup.h"
+#include "util/config.h"
+#include "util/color.h"
+#include "util/dso.h"
+#include "util/evlist.h"
+#include "util/evsel.h"
+#include "util/evsel_config.h"
+#include "util/event.h"
+#include "util/machine.h"
+#include "util/map.h"
+#include "util/mmap.h"
+#include "util/session.h"
+#include "util/thread.h"
+#include "util/symbol.h"
+#include "util/synthetic-events.h"
+#include "util/top.h"
+#include "util/util.h"
+#include <linux/rbtree.h>
+#include <subcmd/parse-options.h>
+#include "util/parse-events.h"
+#include "util/callchain.h"
+#include "util/cpumap.h"
+#include "util/sort.h"
+#include "util/string2.h"
+#include "util/term.h"
+#include "util/intlist.h"
+#include "util/parse-branch-options.h"
+#include "arch/common.h"
+#include "ui/ui.h"
+
+#include "util/debug.h"
+#include "util/ordered-events.h"
+#include "util/pfm.h"
+
+#include <assert.h>
+#include <elf.h>
+#include <fcntl.h>
+
+#include <stdio.h>
+#include <termios.h>
+#include <unistd.h>
+#include <inttypes.h>
+
+#include <errno.h>
+#include <time.h>
+#include <sched.h>
+#include <signal.h>
+
+#include <sys/syscall.h>
+#include <sys/ioctl.h>
+#include <poll.h>
+#include <sys/prctl.h>
+#include <sys/wait.h>
+#include <sys/uio.h>
+#include <sys/utsname.h>
+#include <sys/mman.h>
+
+#include <linux/stringify.h>
+#include <linux/time64.h>
+#include <linux/types.h>
+#include <linux/err.h>
+
+#include <linux/ctype.h>
+#include <perf/mmap.h>
+
+static volatile int done;
+static volatile int resize;
+
+#define HEADER_LINE_NR 5
+
+static void perf_top__update_print_entries(struct perf_top *top)
+{
+ top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;
+}
+
+static void winch_sig(int sig __maybe_unused)
+{
+ resize = 1;
+}
+
+static void perf_top__resize(struct perf_top *top)
+{
+ get_term_dimensions(&top->winsize);
+ perf_top__update_print_entries(top);
+}
+
+static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
+{
+ struct evsel *evsel;
+ struct symbol *sym;
+ struct annotation *notes;
+ struct map *map;
+ int err = -1;
+
+ if (!he || !he->ms.sym)
+ return -1;
+
+ evsel = hists_to_evsel(he->hists);
+
+ sym = he->ms.sym;
+ map = he->ms.map;
+
+ /*
+ * We can't annotate with just /proc/kallsyms
+ */
+ if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
+ !dso__is_kcore(map->dso)) {
+ pr_err("Can't annotate %s: No vmlinux file was found in the "
+ "path\n", sym->name);
+ sleep(1);
+ return -1;
+ }
+
+ notes = symbol__annotation(sym);
+ mutex_lock(&notes->lock);
+
+ if (!symbol__hists(sym, top->evlist->core.nr_entries)) {
+ mutex_unlock(&notes->lock);
+ pr_err("Not enough memory for annotating '%s' symbol!\n",
+ sym->name);
+ sleep(1);
+ return err;
+ }
+
+ err = symbol__annotate(&he->ms, evsel, &top->annotation_opts, NULL);
+ if (err == 0) {
+ top->sym_filter_entry = he;
+ } else {
+ char msg[BUFSIZ];
+ symbol__strerror_disassemble(&he->ms, err, msg, sizeof(msg));
+ pr_err("Couldn't annotate %s: %s\n", sym->name, msg);
+ }
+
+ mutex_unlock(&notes->lock);
+ return err;
+}
+
+static void __zero_source_counters(struct hist_entry *he)
+{
+ struct symbol *sym = he->ms.sym;
+ symbol__annotate_zero_histograms(sym);
+}
+
+static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
+{
+ struct utsname uts;
+ int err = uname(&uts);
+
+ ui__warning("Out of bounds address found:\n\n"
+ "Addr: %" PRIx64 "\n"
+ "DSO: %s %c\n"
+ "Map: %" PRIx64 "-%" PRIx64 "\n"
+ "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
+ "Arch: %s\n"
+ "Kernel: %s\n"
+ "Tools: %s\n\n"
+ "Not all samples will be on the annotation output.\n\n"
+ "Please report to linux-kernel@vger.kernel.org\n",
+ ip, map->dso->long_name, dso__symtab_origin(map->dso),
+ map->start, map->end, sym->start, sym->end,
+ sym->binding == STB_GLOBAL ? 'g' :
+ sym->binding == STB_LOCAL ? 'l' : 'w', sym->name,
+ err ? "[unknown]" : uts.machine,
+ err ? "[unknown]" : uts.release, perf_version_string);
+ if (use_browser <= 0)
+ sleep(5);
+
+ map->erange_warned = true;
+}
+
+static void perf_top__record_precise_ip(struct perf_top *top,
+ struct hist_entry *he,
+ struct perf_sample *sample,
+ struct evsel *evsel, u64 ip)
+ EXCLUSIVE_LOCKS_REQUIRED(he->hists->lock)
+{
+ struct annotation *notes;
+ struct symbol *sym = he->ms.sym;
+ int err = 0;
+
+ if (sym == NULL || (use_browser == 0 &&
+ (top->sym_filter_entry == NULL ||
+ top->sym_filter_entry->ms.sym != sym)))
+ return;
+
+ notes = symbol__annotation(sym);
+
+ if (!mutex_trylock(&notes->lock))
+ return;
+
+ err = hist_entry__inc_addr_samples(he, sample, evsel, ip);
+
+ mutex_unlock(&notes->lock);
+
+ if (unlikely(err)) {
+ /*
+ * This function is now called with he->hists->lock held.
+ * Release it before going to sleep.
+ */
+ mutex_unlock(&he->hists->lock);
+
+ if (err == -ERANGE && !he->ms.map->erange_warned)
+ ui__warn_map_erange(he->ms.map, sym, ip);
+ else if (err == -ENOMEM) {
+ pr_err("Not enough memory for annotating '%s' symbol!\n",
+ sym->name);
+ sleep(1);
+ }
+
+ mutex_lock(&he->hists->lock);
+ }
+}
+
+static void perf_top__show_details(struct perf_top *top)
+{
+ struct hist_entry *he = top->sym_filter_entry;
+ struct evsel *evsel;
+ struct annotation *notes;
+ struct symbol *symbol;
+ int more;
+
+ if (!he)
+ return;
+
+ evsel = hists_to_evsel(he->hists);
+
+ symbol = he->ms.sym;
+ notes = symbol__annotation(symbol);
+
+ mutex_lock(&notes->lock);
+
+ symbol__calc_percent(symbol, evsel);
+
+ if (notes->src == NULL)
+ goto out_unlock;
+
+ printf("Showing %s for %s\n", evsel__name(top->sym_evsel), symbol->name);
+ printf(" Events Pcnt (>=%d%%)\n", top->annotation_opts.min_pcnt);
+
+ more = symbol__annotate_printf(&he->ms, top->sym_evsel, &top->annotation_opts);
+
+ if (top->evlist->enabled) {
+ if (top->zero)
+ symbol__annotate_zero_histogram(symbol, top->sym_evsel->core.idx);
+ else
+ symbol__annotate_decay_histogram(symbol, top->sym_evsel->core.idx);
+ }
+ if (more != 0)
+ printf("%d lines not displayed, maybe increase display entries [e]\n", more);
+out_unlock:
+ mutex_unlock(&notes->lock);
+}
+
+static void perf_top__resort_hists(struct perf_top *t)
+{
+ struct evlist *evlist = t->evlist;
+ struct evsel *pos;
+
+ evlist__for_each_entry(evlist, pos) {
+ struct hists *hists = evsel__hists(pos);
+
+ /*
+ * unlink existing entries so that they can be linked
+ * in a correct order in hists__match() below.
+ */
+ hists__unlink(hists);
+
+ if (evlist->enabled) {
+ if (t->zero) {
+ hists__delete_entries(hists);
+ } else {
+ hists__decay_entries(hists, t->hide_user_symbols,
+ t->hide_kernel_symbols);
+ }
+ }
+
+ hists__collapse_resort(hists, NULL);
+
+ /* 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);
+ }
+ }
+
+ evlist__for_each_entry(evlist, pos) {
+ evsel__output_resort(pos, NULL);
+ }
+}
+
+static void perf_top__print_sym_table(struct perf_top *top)
+{
+ char bf[160];
+ int printed = 0;
+ const int win_width = top->winsize.ws_col - 1;
+ struct evsel *evsel = top->sym_evsel;
+ struct hists *hists = evsel__hists(evsel);
+
+ puts(CONSOLE_CLEAR);
+
+ perf_top__header_snprintf(top, bf, sizeof(bf));
+ printf("%s\n", bf);
+
+ printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
+
+ if (!top->record_opts.overwrite &&
+ (top->evlist->stats.nr_lost_warned !=
+ top->evlist->stats.nr_events[PERF_RECORD_LOST])) {
+ top->evlist->stats.nr_lost_warned =
+ top->evlist->stats.nr_events[PERF_RECORD_LOST];
+ color_fprintf(stdout, PERF_COLOR_RED,
+ "WARNING: LOST %d chunks, Check IO/CPU overload",
+ top->evlist->stats.nr_lost_warned);
+ ++printed;
+ }
+
+ if (top->sym_filter_entry) {
+ perf_top__show_details(top);
+ return;
+ }
+
+ perf_top__resort_hists(top);
+
+ hists__output_recalc_col_len(hists, top->print_entries - printed);
+ putchar('\n');
+ hists__fprintf(hists, false, top->print_entries - printed, win_width,
+ top->min_percent, stdout, !symbol_conf.use_callchain);
+}
+
+static void prompt_integer(int *target, const char *msg)
+{
+ char *buf = malloc(0), *p;
+ size_t dummy = 0;
+ int tmp;
+
+ fprintf(stdout, "\n%s: ", msg);
+ if (getline(&buf, &dummy, stdin) < 0)
+ return;
+
+ p = strchr(buf, '\n');
+ if (p)
+ *p = 0;
+
+ p = buf;
+ while(*p) {
+ if (!isdigit(*p))
+ goto out_free;
+ p++;
+ }
+ tmp = strtoul(buf, NULL, 10);
+ *target = tmp;
+out_free:
+ free(buf);
+}
+
+static void prompt_percent(int *target, const char *msg)
+{
+ int tmp = 0;
+
+ prompt_integer(&tmp, msg);
+ if (tmp >= 0 && tmp <= 100)
+ *target = tmp;
+}
+
+static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
+{
+ char *buf = malloc(0), *p;
+ struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
+ struct hists *hists = evsel__hists(top->sym_evsel);
+ struct rb_node *next;
+ size_t dummy = 0;
+
+ /* zero counters of active symbol */
+ if (syme) {
+ __zero_source_counters(syme);
+ top->sym_filter_entry = NULL;
+ }
+
+ fprintf(stdout, "\n%s: ", msg);
+ if (getline(&buf, &dummy, stdin) < 0)
+ goto out_free;
+
+ p = strchr(buf, '\n');
+ if (p)
+ *p = 0;
+
+ next = rb_first_cached(&hists->entries);
+ while (next) {
+ n = rb_entry(next, struct hist_entry, rb_node);
+ if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
+ found = n;
+ break;
+ }
+ next = rb_next(&n->rb_node);
+ }
+
+ if (!found) {
+ fprintf(stderr, "Sorry, %s is not active.\n", buf);
+ sleep(1);
+ } else
+ perf_top__parse_source(top, found);
+
+out_free:
+ free(buf);
+}
+
+static void perf_top__print_mapped_keys(struct perf_top *top)
+{
+ char *name = NULL;
+
+ if (top->sym_filter_entry) {
+ struct symbol *sym = top->sym_filter_entry->ms.sym;
+ name = sym->name;
+ }
+
+ fprintf(stdout, "\nMapped keys:\n");
+ fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs);
+ fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries);
+
+ if (top->evlist->core.nr_entries > 1)
+ fprintf(stdout, "\t[E] active event counter. \t(%s)\n", evsel__name(top->sym_evsel));
+
+ fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter);
+
+ fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->annotation_opts.min_pcnt);
+ fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
+ fprintf(stdout, "\t[S] stop annotation.\n");
+
+ fprintf(stdout,
+ "\t[K] hide kernel symbols. \t(%s)\n",
+ top->hide_kernel_symbols ? "yes" : "no");
+ fprintf(stdout,
+ "\t[U] hide user symbols. \t(%s)\n",
+ top->hide_user_symbols ? "yes" : "no");
+ fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0);
+ fprintf(stdout, "\t[qQ] quit.\n");
+}
+
+static int perf_top__key_mapped(struct perf_top *top, int c)
+{
+ switch (c) {
+ case 'd':
+ case 'e':
+ case 'f':
+ case 'z':
+ case 'q':
+ case 'Q':
+ case 'K':
+ case 'U':
+ case 'F':
+ case 's':
+ case 'S':
+ return 1;
+ case 'E':
+ return top->evlist->core.nr_entries > 1 ? 1 : 0;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static bool perf_top__handle_keypress(struct perf_top *top, int c)
+{
+ bool ret = true;
+
+ if (!perf_top__key_mapped(top, c)) {
+ struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
+ struct termios save;
+
+ perf_top__print_mapped_keys(top);
+ fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
+ fflush(stdout);
+
+ set_term_quiet_input(&save);
+
+ poll(&stdin_poll, 1, -1);
+ c = getc(stdin);
+
+ tcsetattr(0, TCSAFLUSH, &save);
+ if (!perf_top__key_mapped(top, c))
+ return ret;
+ }
+
+ switch (c) {
+ case 'd':
+ prompt_integer(&top->delay_secs, "Enter display delay");
+ if (top->delay_secs < 1)
+ top->delay_secs = 1;
+ break;
+ case 'e':
+ prompt_integer(&top->print_entries, "Enter display entries (lines)");
+ if (top->print_entries == 0) {
+ perf_top__resize(top);
+ signal(SIGWINCH, winch_sig);
+ } else {
+ signal(SIGWINCH, SIG_DFL);
+ }
+ break;
+ case 'E':
+ if (top->evlist->core.nr_entries > 1) {
+ /* Select 0 as the default event: */
+ int counter = 0;
+
+ fprintf(stderr, "\nAvailable events:");
+
+ evlist__for_each_entry(top->evlist, top->sym_evsel)
+ fprintf(stderr, "\n\t%d %s", top->sym_evsel->core.idx, evsel__name(top->sym_evsel));
+
+ prompt_integer(&counter, "Enter details event counter");
+
+ if (counter >= top->evlist->core.nr_entries) {
+ top->sym_evsel = evlist__first(top->evlist);
+ fprintf(stderr, "Sorry, no such event, using %s.\n", evsel__name(top->sym_evsel));
+ sleep(1);
+ break;
+ }
+ evlist__for_each_entry(top->evlist, top->sym_evsel)
+ if (top->sym_evsel->core.idx == counter)
+ break;
+ } else
+ top->sym_evsel = evlist__first(top->evlist);
+ break;
+ case 'f':
+ prompt_integer(&top->count_filter, "Enter display event count filter");
+ break;
+ case 'F':
+ prompt_percent(&top->annotation_opts.min_pcnt,
+ "Enter details display event filter (percent)");
+ break;
+ case 'K':
+ top->hide_kernel_symbols = !top->hide_kernel_symbols;
+ break;
+ case 'q':
+ case 'Q':
+ printf("exiting.\n");
+ if (top->dump_symtab)
+ perf_session__fprintf_dsos(top->session, stderr);
+ ret = false;
+ break;
+ case 's':
+ perf_top__prompt_symbol(top, "Enter details symbol");
+ break;
+ case 'S':
+ if (!top->sym_filter_entry)
+ break;
+ else {
+ struct hist_entry *syme = top->sym_filter_entry;
+
+ top->sym_filter_entry = NULL;
+ __zero_source_counters(syme);
+ }
+ break;
+ case 'U':
+ top->hide_user_symbols = !top->hide_user_symbols;
+ break;
+ case 'z':
+ top->zero = !top->zero;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static void perf_top__sort_new_samples(void *arg)
+{
+ struct perf_top *t = arg;
+
+ if (t->evlist->selected != NULL)
+ t->sym_evsel = t->evlist->selected;
+
+ perf_top__resort_hists(t);
+
+ if (t->lost || t->drop)
+ pr_warning("Too slow to read ring buffer (change period (-c/-F) or limit CPUs (-C)\n");
+}
+
+static void stop_top(void)
+{
+ session_done = 1;
+ done = 1;
+}
+
+static void *display_thread_tui(void *arg)
+{
+ struct evsel *pos;
+ struct perf_top *top = arg;
+ const char *help = "For a higher level overview, try: perf top --sort comm,dso";
+ struct hist_browser_timer hbt = {
+ .timer = perf_top__sort_new_samples,
+ .arg = top,
+ .refresh = top->delay_secs,
+ };
+ int ret;
+
+ /* 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.
+ */
+ unshare(CLONE_FS);
+
+ prctl(PR_SET_NAME, "perf-top-UI", 0, 0, 0);
+
+repeat:
+ perf_top__sort_new_samples(top);
+
+ /*
+ * Initialize the uid_filter_str, in the future the TUI will allow
+ * Zooming in/out UIDs. For now just use whatever the user passed
+ * via --uid.
+ */
+ evlist__for_each_entry(top->evlist, pos) {
+ struct hists *hists = evsel__hists(pos);
+ hists->uid_filter_str = top->record_opts.target.uid_str;
+ }
+
+ ret = evlist__tui_browse_hists(top->evlist, help, &hbt, top->min_percent,
+ &top->session->header.env, !top->record_opts.overwrite,
+ &top->annotation_opts);
+ if (ret == K_RELOAD) {
+ top->zero = true;
+ goto repeat;
+ } else
+ stop_top();
+
+ return NULL;
+}
+
+static void display_sig(int sig __maybe_unused)
+{
+ stop_top();
+}
+
+static void display_setup_sig(void)
+{
+ signal(SIGSEGV, sighandler_dump_stack);
+ signal(SIGFPE, sighandler_dump_stack);
+ signal(SIGINT, display_sig);
+ signal(SIGQUIT, display_sig);
+ signal(SIGTERM, display_sig);
+}
+
+static void *display_thread(void *arg)
+{
+ struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
+ struct termios save;
+ struct perf_top *top = arg;
+ int delay_msecs, c;
+
+ /* 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.
+ */
+ unshare(CLONE_FS);
+
+ prctl(PR_SET_NAME, "perf-top-UI", 0, 0, 0);
+
+ display_setup_sig();
+ pthread__unblock_sigwinch();
+repeat:
+ delay_msecs = top->delay_secs * MSEC_PER_SEC;
+ set_term_quiet_input(&save);
+ /* trash return*/
+ clearerr(stdin);
+ if (poll(&stdin_poll, 1, 0) > 0)
+ getc(stdin);
+
+ while (!done) {
+ perf_top__print_sym_table(top);
+ /*
+ * Either timeout expired or we got an EINTR due to SIGWINCH,
+ * refresh screen in both cases.
+ */
+ switch (poll(&stdin_poll, 1, delay_msecs)) {
+ case 0:
+ continue;
+ case -1:
+ if (errno == EINTR)
+ continue;
+ __fallthrough;
+ default:
+ c = getc(stdin);
+ tcsetattr(0, TCSAFLUSH, &save);
+
+ if (perf_top__handle_keypress(top, c))
+ goto repeat;
+ stop_top();
+ }
+ }
+
+ tcsetattr(0, TCSAFLUSH, &save);
+ return NULL;
+}
+
+static int hist_iter__top_callback(struct hist_entry_iter *iter,
+ struct addr_location *al, bool single,
+ void *arg)
+ EXCLUSIVE_LOCKS_REQUIRED(iter->he->hists->lock)
+{
+ struct perf_top *top = arg;
+ struct evsel *evsel = iter->evsel;
+
+ if (perf_hpp_list.sym && single)
+ perf_top__record_precise_ip(top, iter->he, iter->sample, evsel, al->addr);
+
+ hist__account_cycles(iter->sample->branch_stack, al, iter->sample,
+ !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY),
+ NULL);
+ return 0;
+}
+
+static void perf_event__process_sample(struct perf_tool *tool,
+ const union perf_event *event,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct perf_top *top = container_of(tool, struct perf_top, tool);
+ struct addr_location al;
+
+ if (!machine && perf_guest) {
+ static struct intlist *seen;
+
+ if (!seen)
+ seen = intlist__new(NULL);
+
+ if (!intlist__has_entry(seen, sample->pid)) {
+ pr_err("Can't find guest [%d]'s kernel information\n",
+ sample->pid);
+ intlist__add(seen, sample->pid);
+ }
+ return;
+ }
+
+ if (!machine) {
+ pr_err("%u unprocessable samples recorded.\r",
+ top->session->evlist->stats.nr_unprocessable_samples++);
+ return;
+ }
+
+ if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
+ top->exact_samples++;
+
+ if (machine__resolve(machine, &al, sample) < 0)
+ return;
+
+ if (top->stitch_lbr)
+ al.thread->lbr_stitch_enable = true;
+
+ if (!machine->kptr_restrict_warned &&
+ symbol_conf.kptr_restrict &&
+ al.cpumode == PERF_RECORD_MISC_KERNEL) {
+ if (!evlist__exclude_kernel(top->session->evlist)) {
+ ui__warning(
+"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
+"Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
+"Kernel%s samples will not be resolved.\n",
+ al.map && map__has_symbols(al.map) ?
+ " modules" : "");
+ if (use_browser <= 0)
+ sleep(5);
+ }
+ machine->kptr_restrict_warned = true;
+ }
+
+ if (al.sym == NULL && al.map != NULL) {
+ const char *msg = "Kernel samples will not be resolved.\n";
+ /*
+ * As we do lazy loading of symtabs we only will know if the
+ * specified vmlinux file is invalid when we actually have a
+ * hit in kernel space and then try to load it. So if we get
+ * here and there are _no_ symbols in the DSO backing the
+ * kernel map, bail out.
+ *
+ * We may never get here, for instance, if we use -K/
+ * --hide-kernel-symbols, even if the user specifies an
+ * invalid --vmlinux ;-)
+ */
+ if (!machine->kptr_restrict_warned && !top->vmlinux_warned &&
+ __map__is_kernel(al.map) && map__has_symbols(al.map)) {
+ if (symbol_conf.vmlinux_name) {
+ char serr[256];
+ dso__strerror_load(al.map->dso, serr, sizeof(serr));
+ ui__warning("The %s file can't be used: %s\n%s",
+ symbol_conf.vmlinux_name, serr, msg);
+ } else {
+ ui__warning("A vmlinux file was not found.\n%s",
+ msg);
+ }
+
+ if (use_browser <= 0)
+ sleep(5);
+ top->vmlinux_warned = true;
+ }
+ }
+
+ if (al.sym == NULL || !al.sym->idle) {
+ struct hists *hists = evsel__hists(evsel);
+ struct hist_entry_iter iter = {
+ .evsel = evsel,
+ .sample = sample,
+ .add_entry_cb = hist_iter__top_callback,
+ };
+
+ if (symbol_conf.cumulate_callchain)
+ iter.ops = &hist_iter_cumulative;
+ else
+ iter.ops = &hist_iter_normal;
+
+ mutex_lock(&hists->lock);
+
+ if (hist_entry_iter__add(&iter, &al, top->max_stack, top) < 0)
+ pr_err("Problem incrementing symbol period, skipping event\n");
+
+ mutex_unlock(&hists->lock);
+ }
+
+ addr_location__put(&al);
+}
+
+static void
+perf_top__process_lost(struct perf_top *top, union perf_event *event,
+ struct evsel *evsel)
+{
+ top->lost += event->lost.lost;
+ top->lost_total += event->lost.lost;
+ evsel->evlist->stats.total_lost += event->lost.lost;
+}
+
+static void
+perf_top__process_lost_samples(struct perf_top *top,
+ union perf_event *event,
+ struct evsel *evsel)
+{
+ top->lost += event->lost_samples.lost;
+ top->lost_total += event->lost_samples.lost;
+ evsel->evlist->stats.total_lost_samples += event->lost_samples.lost;
+}
+
+static u64 last_timestamp;
+
+static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
+{
+ struct record_opts *opts = &top->record_opts;
+ struct evlist *evlist = top->evlist;
+ struct mmap *md;
+ union perf_event *event;
+
+ md = opts->overwrite ? &evlist->overwrite_mmap[idx] : &evlist->mmap[idx];
+ if (perf_mmap__read_init(&md->core) < 0)
+ return;
+
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
+ int ret;
+
+ ret = evlist__parse_sample_timestamp(evlist, event, &last_timestamp);
+ if (ret && ret != -1)
+ break;
+
+ ret = ordered_events__queue(top->qe.in, event, last_timestamp, 0, NULL);
+ if (ret)
+ break;
+
+ perf_mmap__consume(&md->core);
+
+ if (top->qe.rotate) {
+ mutex_lock(&top->qe.mutex);
+ top->qe.rotate = false;
+ cond_signal(&top->qe.cond);
+ mutex_unlock(&top->qe.mutex);
+ }
+ }
+
+ perf_mmap__read_done(&md->core);
+}
+
+static void perf_top__mmap_read(struct perf_top *top)
+{
+ bool overwrite = top->record_opts.overwrite;
+ struct evlist *evlist = top->evlist;
+ int i;
+
+ if (overwrite)
+ evlist__toggle_bkw_mmap(evlist, BKW_MMAP_DATA_PENDING);
+
+ for (i = 0; i < top->evlist->core.nr_mmaps; i++)
+ perf_top__mmap_read_idx(top, i);
+
+ if (overwrite) {
+ evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY);
+ evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
+ }
+}
+
+/*
+ * Check per-event overwrite term.
+ * perf top should support consistent term for all events.
+ * - All events don't have per-event term
+ * E.g. "cpu/cpu-cycles/,cpu/instructions/"
+ * Nothing change, return 0.
+ * - All events have same per-event term
+ * E.g. "cpu/cpu-cycles,no-overwrite/,cpu/instructions,no-overwrite/
+ * Using the per-event setting to replace the opts->overwrite if
+ * they are different, then return 0.
+ * - Events have different per-event term
+ * E.g. "cpu/cpu-cycles,overwrite/,cpu/instructions,no-overwrite/"
+ * Return -1
+ * - Some of the event set per-event term, but some not.
+ * E.g. "cpu/cpu-cycles/,cpu/instructions,no-overwrite/"
+ * Return -1
+ */
+static int perf_top__overwrite_check(struct perf_top *top)
+{
+ struct record_opts *opts = &top->record_opts;
+ struct evlist *evlist = top->evlist;
+ struct evsel_config_term *term;
+ struct list_head *config_terms;
+ struct evsel *evsel;
+ int set, overwrite = -1;
+
+ evlist__for_each_entry(evlist, evsel) {
+ set = -1;
+ config_terms = &evsel->config_terms;
+ list_for_each_entry(term, config_terms, list) {
+ if (term->type == EVSEL__CONFIG_TERM_OVERWRITE)
+ set = term->val.overwrite ? 1 : 0;
+ }
+
+ /* no term for current and previous event (likely) */
+ if ((overwrite < 0) && (set < 0))
+ continue;
+
+ /* has term for both current and previous event, compare */
+ if ((overwrite >= 0) && (set >= 0) && (overwrite != set))
+ return -1;
+
+ /* no term for current event but has term for previous one */
+ if ((overwrite >= 0) && (set < 0))
+ return -1;
+
+ /* has term for current event */
+ if ((overwrite < 0) && (set >= 0)) {
+ /* if it's first event, set overwrite */
+ if (evsel == evlist__first(evlist))
+ overwrite = set;
+ else
+ return -1;
+ }
+ }
+
+ if ((overwrite >= 0) && (opts->overwrite != overwrite))
+ opts->overwrite = overwrite;
+
+ return 0;
+}
+
+static int perf_top_overwrite_fallback(struct perf_top *top,
+ struct evsel *evsel)
+{
+ struct record_opts *opts = &top->record_opts;
+ struct evlist *evlist = top->evlist;
+ struct evsel *counter;
+
+ if (!opts->overwrite)
+ return 0;
+
+ /* only fall back when first event fails */
+ if (evsel != evlist__first(evlist))
+ return 0;
+
+ evlist__for_each_entry(evlist, counter)
+ counter->core.attr.write_backward = false;
+ opts->overwrite = false;
+ pr_debug2("fall back to non-overwrite mode\n");
+ return 1;
+}
+
+static int perf_top__start_counters(struct perf_top *top)
+{
+ char msg[BUFSIZ];
+ struct evsel *counter;
+ struct evlist *evlist = top->evlist;
+ struct record_opts *opts = &top->record_opts;
+
+ if (perf_top__overwrite_check(top)) {
+ ui__error("perf top only support consistent per-event "
+ "overwrite setting for all events\n");
+ goto out_err;
+ }
+
+ evlist__config(evlist, opts, &callchain_param);
+
+ evlist__for_each_entry(evlist, counter) {
+try_again:
+ if (evsel__open(counter, top->evlist->core.user_requested_cpus,
+ top->evlist->core.threads) < 0) {
+
+ /*
+ * Specially handle overwrite fall back.
+ * Because perf top is the only tool which has
+ * overwrite mode by default, support
+ * both overwrite and non-overwrite mode, and
+ * require consistent mode for all events.
+ *
+ * May move it to generic code with more tools
+ * have similar attribute.
+ */
+ if (perf_missing_features.write_backward &&
+ perf_top_overwrite_fallback(top, counter))
+ goto try_again;
+
+ if (evsel__fallback(counter, errno, msg, sizeof(msg))) {
+ if (verbose > 0)
+ ui__warning("%s\n", msg);
+ goto try_again;
+ }
+
+ evsel__open_strerror(counter, &opts->target, errno, msg, sizeof(msg));
+ ui__error("%s\n", msg);
+ goto out_err;
+ }
+ }
+
+ if (evlist__mmap(evlist, opts->mmap_pages) < 0) {
+ ui__error("Failed to mmap with %d (%s)\n",
+ errno, str_error_r(errno, msg, sizeof(msg)));
+ goto out_err;
+ }
+
+ return 0;
+
+out_err:
+ return -1;
+}
+
+static int callchain_param__setup_sample_type(struct callchain_param *callchain)
+{
+ if (callchain->mode != CHAIN_NONE) {
+ if (callchain_register_param(callchain) < 0) {
+ ui__error("Can't register callchain params.\n");
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static struct ordered_events *rotate_queues(struct perf_top *top)
+{
+ struct ordered_events *in = top->qe.in;
+
+ if (top->qe.in == &top->qe.data[1])
+ top->qe.in = &top->qe.data[0];
+ else
+ top->qe.in = &top->qe.data[1];
+
+ return in;
+}
+
+static void *process_thread(void *arg)
+{
+ struct perf_top *top = arg;
+
+ while (!done) {
+ struct ordered_events *out, *in = top->qe.in;
+
+ if (!in->nr_events) {
+ usleep(100);
+ continue;
+ }
+
+ out = rotate_queues(top);
+
+ mutex_lock(&top->qe.mutex);
+ top->qe.rotate = true;
+ cond_wait(&top->qe.cond, &top->qe.mutex);
+ mutex_unlock(&top->qe.mutex);
+
+ if (ordered_events__flush(out, OE_FLUSH__TOP))
+ pr_err("failed to process events\n");
+ }
+
+ return NULL;
+}
+
+/*
+ * Allow only 'top->delay_secs' seconds behind samples.
+ */
+static int should_drop(struct ordered_event *qevent, struct perf_top *top)
+{
+ union perf_event *event = qevent->event;
+ u64 delay_timestamp;
+
+ if (event->header.type != PERF_RECORD_SAMPLE)
+ return false;
+
+ delay_timestamp = qevent->timestamp + top->delay_secs * NSEC_PER_SEC;
+ return delay_timestamp < last_timestamp;
+}
+
+static int deliver_event(struct ordered_events *qe,
+ struct ordered_event *qevent)
+{
+ struct perf_top *top = qe->data;
+ struct evlist *evlist = top->evlist;
+ struct perf_session *session = top->session;
+ union perf_event *event = qevent->event;
+ struct perf_sample sample;
+ struct evsel *evsel;
+ struct machine *machine;
+ int ret = -1;
+
+ if (should_drop(qevent, top)) {
+ top->drop++;
+ top->drop_total++;
+ return 0;
+ }
+
+ ret = evlist__parse_sample(evlist, event, &sample);
+ if (ret) {
+ pr_err("Can't parse sample, err = %d\n", ret);
+ goto next_event;
+ }
+
+ evsel = evlist__id2evsel(session->evlist, sample.id);
+ assert(evsel != NULL);
+
+ if (event->header.type == PERF_RECORD_SAMPLE) {
+ if (evswitch__discard(&top->evswitch, evsel))
+ return 0;
+ ++top->samples;
+ }
+
+ switch (sample.cpumode) {
+ case PERF_RECORD_MISC_USER:
+ ++top->us_samples;
+ if (top->hide_user_symbols)
+ goto next_event;
+ machine = &session->machines.host;
+ break;
+ case PERF_RECORD_MISC_KERNEL:
+ ++top->kernel_samples;
+ if (top->hide_kernel_symbols)
+ goto next_event;
+ machine = &session->machines.host;
+ break;
+ case PERF_RECORD_MISC_GUEST_KERNEL:
+ ++top->guest_kernel_samples;
+ machine = perf_session__find_machine(session,
+ sample.pid);
+ break;
+ case PERF_RECORD_MISC_GUEST_USER:
+ ++top->guest_us_samples;
+ /*
+ * TODO: we don't process guest user from host side
+ * except simple counting.
+ */
+ goto next_event;
+ default:
+ if (event->header.type == PERF_RECORD_SAMPLE)
+ goto next_event;
+ machine = &session->machines.host;
+ break;
+ }
+
+ if (event->header.type == PERF_RECORD_SAMPLE) {
+ perf_event__process_sample(&top->tool, event, evsel,
+ &sample, machine);
+ } else if (event->header.type == PERF_RECORD_LOST) {
+ perf_top__process_lost(top, event, evsel);
+ } else if (event->header.type == PERF_RECORD_LOST_SAMPLES) {
+ perf_top__process_lost_samples(top, event, evsel);
+ } else if (event->header.type < PERF_RECORD_MAX) {
+ events_stats__inc(&session->evlist->stats, event->header.type);
+ machine__process_event(machine, event, &sample);
+ } else
+ ++session->evlist->stats.nr_unknown_events;
+
+ ret = 0;
+next_event:
+ return ret;
+}
+
+static void init_process_thread(struct perf_top *top)
+{
+ ordered_events__init(&top->qe.data[0], deliver_event, top);
+ ordered_events__init(&top->qe.data[1], deliver_event, top);
+ ordered_events__set_copy_on_queue(&top->qe.data[0], true);
+ ordered_events__set_copy_on_queue(&top->qe.data[1], true);
+ top->qe.in = &top->qe.data[0];
+ mutex_init(&top->qe.mutex);
+ cond_init(&top->qe.cond);
+}
+
+static int __cmd_top(struct perf_top *top)
+{
+ struct record_opts *opts = &top->record_opts;
+ pthread_t thread, thread_process;
+ int ret;
+
+ if (!top->annotation_opts.objdump_path) {
+ ret = perf_env__lookup_objdump(&top->session->header.env,
+ &top->annotation_opts.objdump_path);
+ if (ret)
+ return ret;
+ }
+
+ ret = callchain_param__setup_sample_type(&callchain_param);
+ if (ret)
+ return ret;
+
+ if (perf_session__register_idle_thread(top->session) < 0)
+ return ret;
+
+ if (top->nr_threads_synthesize > 1)
+ perf_set_multithreaded();
+
+ init_process_thread(top);
+
+ if (opts->record_namespaces)
+ top->tool.namespace_events = true;
+ if (opts->record_cgroup) {
+#ifdef HAVE_FILE_HANDLE
+ top->tool.cgroup_events = true;
+#else
+ pr_err("cgroup tracking is not supported.\n");
+ return -1;
+#endif
+ }
+
+ ret = perf_event__synthesize_bpf_events(top->session, perf_event__process,
+ &top->session->machines.host,
+ &top->record_opts);
+ if (ret < 0)
+ pr_debug("Couldn't synthesize BPF events: Pre-existing BPF programs won't have symbols resolved.\n");
+
+ ret = perf_event__synthesize_cgroups(&top->tool, perf_event__process,
+ &top->session->machines.host);
+ if (ret < 0)
+ pr_debug("Couldn't synthesize cgroup events.\n");
+
+ machine__synthesize_threads(&top->session->machines.host, &opts->target,
+ top->evlist->core.threads, true, false,
+ top->nr_threads_synthesize);
+
+ if (top->nr_threads_synthesize > 1)
+ perf_set_singlethreaded();
+
+ if (perf_hpp_list.socket) {
+ ret = perf_env__read_cpu_topology_map(&perf_env);
+ if (ret < 0) {
+ char errbuf[BUFSIZ];
+ const char *err = str_error_r(-ret, errbuf, sizeof(errbuf));
+
+ ui__error("Could not read the CPU topology map: %s\n", err);
+ return ret;
+ }
+ }
+
+ ret = perf_top__start_counters(top);
+ if (ret)
+ return ret;
+
+ top->session->evlist = top->evlist;
+ perf_session__set_id_hdr_size(top->session);
+
+ /*
+ * When perf is starting the traced process, all the events (apart from
+ * group members) have enable_on_exec=1 set, so don't spoil it by
+ * prematurely enabling them.
+ *
+ * XXX 'top' still doesn't start workloads like record, trace, but should,
+ * so leave the check here.
+ */
+ if (!target__none(&opts->target))
+ evlist__enable(top->evlist);
+
+ ret = -1;
+ if (pthread_create(&thread_process, NULL, process_thread, top)) {
+ ui__error("Could not create process thread.\n");
+ return ret;
+ }
+
+ if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
+ display_thread), top)) {
+ ui__error("Could not create display thread.\n");
+ goto out_join_thread;
+ }
+
+ if (top->realtime_prio) {
+ struct sched_param param;
+
+ param.sched_priority = top->realtime_prio;
+ if (sched_setscheduler(0, SCHED_FIFO, &param)) {
+ ui__error("Could not set realtime priority.\n");
+ goto out_join;
+ }
+ }
+
+ /* Wait for a minimal set of events before starting the snapshot */
+ evlist__poll(top->evlist, 100);
+
+ perf_top__mmap_read(top);
+
+ while (!done) {
+ u64 hits = top->samples;
+
+ perf_top__mmap_read(top);
+
+ if (opts->overwrite || (hits == top->samples))
+ ret = evlist__poll(top->evlist, 100);
+
+ if (resize) {
+ perf_top__resize(top);
+ resize = 0;
+ }
+ }
+
+ ret = 0;
+out_join:
+ pthread_join(thread, NULL);
+out_join_thread:
+ cond_signal(&top->qe.cond);
+ pthread_join(thread_process, NULL);
+ return ret;
+}
+
+static int
+callchain_opt(const struct option *opt, const char *arg, int unset)
+{
+ symbol_conf.use_callchain = true;
+ return record_callchain_opt(opt, arg, unset);
+}
+
+static int
+parse_callchain_opt(const struct option *opt, const char *arg, int unset)
+{
+ struct callchain_param *callchain = opt->value;
+
+ callchain->enabled = !unset;
+ callchain->record_mode = CALLCHAIN_FP;
+
+ /*
+ * --no-call-graph
+ */
+ if (unset) {
+ symbol_conf.use_callchain = false;
+ callchain->record_mode = CALLCHAIN_NONE;
+ return 0;
+ }
+
+ return parse_callchain_top_opt(arg);
+}
+
+static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused)
+{
+ if (!strcmp(var, "top.call-graph")) {
+ var = "call-graph.record-mode";
+ return perf_default_config(var, value, cb);
+ }
+ if (!strcmp(var, "top.children")) {
+ symbol_conf.cumulate_callchain = perf_config_bool(var, value);
+ return 0;
+ }
+
+ return 0;
+}
+
+static int
+parse_percent_limit(const struct option *opt, const char *arg,
+ int unset __maybe_unused)
+{
+ struct perf_top *top = opt->value;
+
+ top->min_percent = strtof(arg, NULL);
+ return 0;
+}
+
+const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP
+ "\n\t\t\t\tDefault: fp,graph,0.5,caller,function";
+
+int cmd_top(int argc, const char **argv)
+{
+ char errbuf[BUFSIZ];
+ struct perf_top top = {
+ .count_filter = 5,
+ .delay_secs = 2,
+ .record_opts = {
+ .mmap_pages = UINT_MAX,
+ .user_freq = UINT_MAX,
+ .user_interval = ULLONG_MAX,
+ .freq = 4000, /* 4 KHz */
+ .target = {
+ .uses_mmap = true,
+ },
+ /*
+ * FIXME: This will lose PERF_RECORD_MMAP and other metadata
+ * when we pause, fix that and reenable. Probably using a
+ * separate evlist with a dummy event, i.e. a non-overwrite
+ * ring buffer just for metadata events, while PERF_RECORD_SAMPLE
+ * stays in overwrite mode. -acme
+ * */
+ .overwrite = 0,
+ .sample_time = true,
+ .sample_time_set = true,
+ },
+ .max_stack = sysctl__max_stack(),
+ .annotation_opts = annotation__default_options,
+ .nr_threads_synthesize = UINT_MAX,
+ };
+ struct record_opts *opts = &top.record_opts;
+ struct target *target = &opts->target;
+ const struct option options[] = {
+ OPT_CALLBACK('e', "event", &top.evlist, "event",
+ "event selector. use 'perf list' to list available events",
+ parse_events_option),
+ OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
+ OPT_STRING('p', "pid", &target->pid, "pid",
+ "profile events on existing process id"),
+ OPT_STRING('t', "tid", &target->tid, "tid",
+ "profile events on existing thread id"),
+ OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
+ "system-wide collection from all CPUs"),
+ OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
+ "list of cpus to monitor"),
+ OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
+ "file", "vmlinux pathname"),
+ OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
+ "don't load vmlinux even if found"),
+ OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
+ "file", "kallsyms pathname"),
+ OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
+ "hide kernel symbols"),
+ OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",
+ "number of mmap data pages", evlist__parse_mmap_pages),
+ OPT_INTEGER('r', "realtime", &top.realtime_prio,
+ "collect data with this RT SCHED_FIFO priority"),
+ OPT_INTEGER('d', "delay", &top.delay_secs,
+ "number of seconds to delay between refreshes"),
+ OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
+ "dump the symbol table used for profiling"),
+ OPT_INTEGER('f', "count-filter", &top.count_filter,
+ "only display functions with more events than this"),
+ OPT_BOOLEAN(0, "group", &opts->group,
+ "put the counters into a counter group"),
+ OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
+ "child tasks do not inherit counters"),
+ OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
+ "symbol to annotate"),
+ OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
+ OPT_CALLBACK('F', "freq", &top.record_opts, "freq or 'max'",
+ "profile at this frequency",
+ record__parse_freq),
+ OPT_INTEGER('E', "entries", &top.print_entries,
+ "display this many functions"),
+ OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
+ "hide user symbols"),
+#ifdef HAVE_SLANG_SUPPORT
+ OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
+#endif
+ OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
+ OPT_INCR('v', "verbose", &verbose,
+ "be more verbose (show counter open errors, etc)"),
+ OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
+ "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
+ " Please refer the man page for the complete list."),
+ OPT_STRING(0, "fields", &field_order, "key[,keys...]",
+ "output field(s): overhead, period, sample plus all of sort keys"),
+ OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
+ "Show a column with the number of samples"),
+ OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
+ NULL, "enables call-graph recording and display",
+ &callchain_opt),
+ OPT_CALLBACK(0, "call-graph", &callchain_param,
+ "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]",
+ top_callchain_help, &parse_callchain_opt),
+ OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
+ "Accumulate callchains of children and show total overhead as well"),
+ OPT_INTEGER(0, "max-stack", &top.max_stack,
+ "Set the maximum stack depth when parsing the callchain. "
+ "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
+ OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
+ "ignore callees of these functions in call graphs",
+ report_parse_ignore_callees_opt),
+ OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
+ "Show a column with the sum of periods"),
+ OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
+ "only consider symbols in these dsos"),
+ OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
+ "only consider symbols in these comms"),
+ OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
+ "only consider these symbols"),
+ OPT_BOOLEAN(0, "source", &top.annotation_opts.annotate_src,
+ "Interleave source code with assembly code (default)"),
+ OPT_BOOLEAN(0, "asm-raw", &top.annotation_opts.show_asm_raw,
+ "Display raw encoding of assembly instructions (default)"),
+ OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
+ "Enable kernel symbol demangling"),
+ OPT_BOOLEAN(0, "no-bpf-event", &top.record_opts.no_bpf_event, "do not record bpf events"),
+ OPT_STRING(0, "objdump", &top.annotation_opts.objdump_path, "path",
+ "objdump binary to use for disassembly and annotations"),
+ OPT_STRING('M', "disassembler-style", &top.annotation_opts.disassembler_style, "disassembler style",
+ "Specify disassembler style (e.g. -M intel for intel syntax)"),
+ OPT_STRING(0, "prefix", &top.annotation_opts.prefix, "prefix",
+ "Add prefix to source file path names in programs (with --prefix-strip)"),
+ OPT_STRING(0, "prefix-strip", &top.annotation_opts.prefix_strip, "N",
+ "Strip first N entries of source file path name in programs (with --prefix)"),
+ OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
+ OPT_CALLBACK(0, "percent-limit", &top, "percent",
+ "Don't show entries under that percent", parse_percent_limit),
+ OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
+ "How to display percentage of filtered entries", parse_filter_percentage),
+ OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
+ "width[,width...]",
+ "don't try to adjust column width, use these fixed values"),
+ OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
+ "per thread proc mmap processing timeout in ms"),
+ OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack,
+ "branch any", "sample any taken branches",
+ parse_branch_stack),
+ OPT_CALLBACK('j', "branch-filter", &opts->branch_stack,
+ "branch filter mask", "branch stack filter modes",
+ parse_branch_stack),
+ OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
+ "Show raw trace event output (do not use print fmt or plugins)"),
+ OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
+ "Show entries in a hierarchy"),
+ OPT_BOOLEAN(0, "overwrite", &top.record_opts.overwrite,
+ "Use a backward ring buffer, default: no"),
+ OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"),
+ OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_threads_synthesize,
+ "number of thread to run event synthesize"),
+ OPT_CALLBACK('G', "cgroup", &top.evlist, "name",
+ "monitor event in cgroup name only", parse_cgroups),
+ OPT_BOOLEAN(0, "namespaces", &opts->record_namespaces,
+ "Record namespaces events"),
+ OPT_BOOLEAN(0, "all-cgroups", &opts->record_cgroup,
+ "Record cgroup events"),
+ OPT_INTEGER(0, "group-sort-idx", &symbol_conf.group_sort_idx,
+ "Sort the output by the event at the index n in group. "
+ "If n is invalid, sort by the first event. "
+ "WARNING: should be used on grouped events."),
+ OPT_BOOLEAN(0, "stitch-lbr", &top.stitch_lbr,
+ "Enable LBR callgraph stitching approach"),
+#ifdef HAVE_LIBPFM
+ OPT_CALLBACK(0, "pfm-events", &top.evlist, "event",
+ "libpfm4 event selector. use 'perf list' to list available events",
+ parse_libpfm_events_option),
+#endif
+ OPTS_EVSWITCH(&top.evswitch),
+ OPT_END()
+ };
+ const char * const top_usage[] = {
+ "perf top [<options>]",
+ NULL
+ };
+ int status = hists__init();
+
+ if (status < 0)
+ return status;
+
+ top.annotation_opts.min_pcnt = 5;
+ top.annotation_opts.context = 4;
+
+ top.evlist = evlist__new();
+ if (top.evlist == NULL)
+ return -ENOMEM;
+
+ status = perf_config(perf_top_config, &top);
+ if (status)
+ return status;
+ /*
+ * Since the per arch annotation init routine may need the cpuid, read
+ * it here, since we are not getting this from the perf.data header.
+ */
+ status = perf_env__read_cpuid(&perf_env);
+ if (status) {
+ /*
+ * Some arches do not provide a get_cpuid(), so just use pr_debug, otherwise
+ * warn the user explicitly.
+ */
+ eprintf(status == ENOSYS ? 1 : 0, verbose,
+ "Couldn't read the cpuid for this machine: %s\n",
+ str_error_r(errno, errbuf, sizeof(errbuf)));
+ }
+ top.evlist->env = &perf_env;
+
+ argc = parse_options(argc, argv, options, top_usage, 0);
+ if (argc)
+ usage_with_options(top_usage, options);
+
+ status = symbol__validate_sym_arguments();
+ if (status)
+ goto out_delete_evlist;
+
+ if (annotate_check_args(&top.annotation_opts) < 0)
+ goto out_delete_evlist;
+
+ if (!top.evlist->core.nr_entries &&
+ evlist__add_default(top.evlist) < 0) {
+ pr_err("Not enough memory for event selector list\n");
+ goto out_delete_evlist;
+ }
+
+ status = evswitch__init(&top.evswitch, top.evlist, stderr);
+ if (status)
+ goto out_delete_evlist;
+
+ if (symbol_conf.report_hierarchy) {
+ /* disable incompatible options */
+ symbol_conf.event_group = false;
+ symbol_conf.cumulate_callchain = false;
+
+ if (field_order) {
+ pr_err("Error: --hierarchy and --fields options cannot be used together\n");
+ parse_options_usage(top_usage, options, "fields", 0);
+ parse_options_usage(NULL, options, "hierarchy", 0);
+ goto out_delete_evlist;
+ }
+ }
+
+ if (top.stitch_lbr && !(callchain_param.record_mode == CALLCHAIN_LBR)) {
+ pr_err("Error: --stitch-lbr must be used with --call-graph lbr\n");
+ goto out_delete_evlist;
+ }
+
+ if (nr_cgroups > 0 && opts->record_cgroup) {
+ pr_err("--cgroup and --all-cgroups cannot be used together\n");
+ goto out_delete_evlist;
+ }
+
+ if (opts->branch_stack && callchain_param.enabled)
+ symbol_conf.show_branchflag_count = true;
+
+ sort__mode = SORT_MODE__TOP;
+ /* display thread wants entries to be collapsed in a different tree */
+ perf_hpp_list.need_collapse = 1;
+
+ if (top.use_stdio)
+ use_browser = 0;
+#ifdef HAVE_SLANG_SUPPORT
+ else if (top.use_tui)
+ use_browser = 1;
+#endif
+
+ setup_browser(false);
+
+ if (setup_sorting(top.evlist) < 0) {
+ if (sort_order)
+ parse_options_usage(top_usage, options, "s", 1);
+ if (field_order)
+ parse_options_usage(sort_order ? NULL : top_usage,
+ options, "fields", 0);
+ goto out_delete_evlist;
+ }
+
+ status = target__validate(target);
+ if (status) {
+ target__strerror(target, status, errbuf, BUFSIZ);
+ ui__warning("%s\n", errbuf);
+ }
+
+ status = target__parse_uid(target);
+ if (status) {
+ int saved_errno = errno;
+
+ target__strerror(target, status, errbuf, BUFSIZ);
+ ui__error("%s\n", errbuf);
+
+ status = -saved_errno;
+ goto out_delete_evlist;
+ }
+
+ if (target__none(target))
+ target->system_wide = true;
+
+ if (evlist__create_maps(top.evlist, target) < 0) {
+ ui__error("Couldn't create thread/CPU maps: %s\n",
+ errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf)));
+ status = -errno;
+ goto out_delete_evlist;
+ }
+
+ if (top.delay_secs < 1)
+ top.delay_secs = 1;
+
+ if (record_opts__config(opts)) {
+ status = -EINVAL;
+ goto out_delete_evlist;
+ }
+
+ top.sym_evsel = evlist__first(top.evlist);
+
+ if (!callchain_param.enabled) {
+ symbol_conf.cumulate_callchain = false;
+ perf_hpp__cancel_cumulate();
+ }
+
+ if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
+ callchain_param.order = ORDER_CALLER;
+
+ status = symbol__annotation_init();
+ if (status < 0)
+ goto out_delete_evlist;
+
+ annotation_config__init(&top.annotation_opts);
+
+ symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
+ status = symbol__init(NULL);
+ if (status < 0)
+ goto out_delete_evlist;
+
+ sort__setup_elide(stdout);
+
+ get_term_dimensions(&top.winsize);
+ if (top.print_entries == 0) {
+ perf_top__update_print_entries(&top);
+ signal(SIGWINCH, winch_sig);
+ }
+
+ top.session = perf_session__new(NULL, NULL);
+ if (IS_ERR(top.session)) {
+ status = PTR_ERR(top.session);
+ top.session = NULL;
+ goto out_delete_evlist;
+ }
+
+#ifdef HAVE_LIBBPF_SUPPORT
+ if (!top.record_opts.no_bpf_event) {
+ top.sb_evlist = evlist__new();
+
+ if (top.sb_evlist == NULL) {
+ pr_err("Couldn't create side band evlist.\n.");
+ status = -EINVAL;
+ goto out_delete_evlist;
+ }
+
+ if (evlist__add_bpf_sb_event(top.sb_evlist, &perf_env)) {
+ pr_err("Couldn't ask for PERF_RECORD_BPF_EVENT side band events.\n.");
+ status = -EINVAL;
+ goto out_delete_evlist;
+ }
+ }
+#endif
+
+ if (evlist__start_sb_thread(top.sb_evlist, target)) {
+ pr_debug("Couldn't start the BPF side band thread:\nBPF programs starting from now on won't be annotatable\n");
+ opts->no_bpf_event = true;
+ }
+
+ status = __cmd_top(&top);
+
+ if (!opts->no_bpf_event)
+ evlist__stop_sb_thread(top.sb_evlist);
+
+out_delete_evlist:
+ evlist__delete(top.evlist);
+ perf_session__delete(top.session);
+
+ return status;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 11:10:03 +0000