[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/tools/perf/builtin-top.c b/ap/os/linux/linux-3.4.x/tools/perf/builtin-top.c
new file mode 100644
index 0000000..8ef59f8
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/tools/perf/builtin-top.c
@@ -0,0 +1,1339 @@
+/*
+ * 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>
+ *
+ * Released under the GPL v2. (and only v2, not any later version)
+ */
+#include "builtin.h"
+
+#include "perf.h"
+
+#include "util/annotate.h"
+#include "util/cache.h"
+#include "util/color.h"
+#include "util/evlist.h"
+#include "util/evsel.h"
+#include "util/session.h"
+#include "util/symbol.h"
+#include "util/thread.h"
+#include "util/thread_map.h"
+#include "util/top.h"
+#include "util/util.h"
+#include <linux/rbtree.h>
+#include "util/parse-options.h"
+#include "util/parse-events.h"
+#include "util/cpumap.h"
+#include "util/xyarray.h"
+#include "util/sort.h"
+
+#include "util/debug.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 <sys/syscall.h>
+#include <sys/ioctl.h>
+#include <sys/poll.h>
+#include <sys/prctl.h>
+#include <sys/wait.h>
+#include <sys/uio.h>
+#include <sys/utsname.h>
+#include <sys/mman.h>
+
+#include <linux/unistd.h>
+#include <linux/types.h>
+
+void get_term_dimensions(struct winsize *ws)
+{
+ char *s = getenv("LINES");
+
+ if (s != NULL) {
+ ws->ws_row = atoi(s);
+ s = getenv("COLUMNS");
+ if (s != NULL) {
+ ws->ws_col = atoi(s);
+ if (ws->ws_row && ws->ws_col)
+ return;
+ }
+ }
+#ifdef TIOCGWINSZ
+ if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
+ ws->ws_row && ws->ws_col)
+ return;
+#endif
+ ws->ws_row = 25;
+ ws->ws_col = 80;
+}
+
+static void perf_top__update_print_entries(struct perf_top *top)
+{
+ if (top->print_entries > 9)
+ top->print_entries -= 9;
+}
+
+static void perf_top__sig_winch(int sig __used, siginfo_t *info __used, void *arg)
+{
+ struct perf_top *top = arg;
+
+ get_term_dimensions(&top->winsize);
+ if (!top->print_entries
+ || (top->print_entries+4) > top->winsize.ws_row) {
+ top->print_entries = top->winsize.ws_row;
+ } else {
+ top->print_entries += 4;
+ top->winsize.ws_row = top->print_entries;
+ }
+ perf_top__update_print_entries(top);
+}
+
+static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
+{
+ struct symbol *sym;
+ struct annotation *notes;
+ struct map *map;
+ int err = -1;
+
+ if (!he || !he->ms.sym)
+ return -1;
+
+ sym = he->ms.sym;
+ map = he->ms.map;
+
+ /*
+ * We can't annotate with just /proc/kallsyms
+ */
+ if (map->dso->symtab_type == SYMTAB__KALLSYMS) {
+ 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);
+ if (notes->src != NULL) {
+ pthread_mutex_lock(¬es->lock);
+ goto out_assign;
+ }
+
+ pthread_mutex_lock(¬es->lock);
+
+ if (symbol__alloc_hist(sym) < 0) {
+ pthread_mutex_unlock(¬es->lock);
+ pr_err("Not enough memory for annotating '%s' symbol!\n",
+ sym->name);
+ sleep(1);
+ return err;
+ }
+
+ err = symbol__annotate(sym, map, 0);
+ if (err == 0) {
+out_assign:
+ top->sym_filter_entry = he;
+ }
+
+ pthread_mutex_unlock(¬es->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,
+ int counter, u64 ip)
+{
+ struct annotation *notes;
+ struct symbol *sym;
+ int err;
+
+ if (he == NULL || he->ms.sym == NULL ||
+ ((top->sym_filter_entry == NULL ||
+ top->sym_filter_entry->ms.sym != he->ms.sym) && use_browser != 1))
+ return;
+
+ sym = he->ms.sym;
+ notes = symbol__annotation(sym);
+
+ if (pthread_mutex_trylock(¬es->lock))
+ return;
+
+ if (notes->src == NULL && symbol__alloc_hist(sym) < 0) {
+ pthread_mutex_unlock(¬es->lock);
+ pr_err("Not enough memory for annotating '%s' symbol!\n",
+ sym->name);
+ sleep(1);
+ return;
+ }
+
+ ip = he->ms.map->map_ip(he->ms.map, ip);
+ err = symbol__inc_addr_samples(sym, he->ms.map, counter, ip);
+
+ pthread_mutex_unlock(¬es->lock);
+
+ if (err == -ERANGE && !he->ms.map->erange_warned)
+ ui__warn_map_erange(he->ms.map, sym, ip);
+}
+
+static void perf_top__show_details(struct perf_top *top)
+{
+ struct hist_entry *he = top->sym_filter_entry;
+ struct annotation *notes;
+ struct symbol *symbol;
+ int more;
+
+ if (!he)
+ return;
+
+ symbol = he->ms.sym;
+ notes = symbol__annotation(symbol);
+
+ pthread_mutex_lock(¬es->lock);
+
+ if (notes->src == NULL)
+ goto out_unlock;
+
+ printf("Showing %s for %s\n", event_name(top->sym_evsel), symbol->name);
+ printf(" Events Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
+
+ more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel->idx,
+ 0, top->sym_pcnt_filter, top->print_entries, 4);
+ if (top->zero)
+ symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
+ else
+ symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
+ if (more != 0)
+ printf("%d lines not displayed, maybe increase display entries [e]\n", more);
+out_unlock:
+ pthread_mutex_unlock(¬es->lock);
+}
+
+static const char CONSOLE_CLEAR[] = "[H[2J";
+
+static struct hist_entry *perf_evsel__add_hist_entry(struct perf_evsel *evsel,
+ struct addr_location *al,
+ struct perf_sample *sample)
+{
+ struct hist_entry *he;
+
+ he = __hists__add_entry(&evsel->hists, al, NULL, sample->period);
+ if (he == NULL)
+ return NULL;
+
+ hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
+ return he;
+}
+
+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;
+
+ puts(CONSOLE_CLEAR);
+
+ perf_top__header_snprintf(top, bf, sizeof(bf));
+ printf("%s\n", bf);
+
+ perf_top__reset_sample_counters(top);
+
+ printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
+
+ if (top->sym_evsel->hists.stats.nr_lost_warned !=
+ top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]) {
+ top->sym_evsel->hists.stats.nr_lost_warned =
+ top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST];
+ color_fprintf(stdout, PERF_COLOR_RED,
+ "WARNING: LOST %d chunks, Check IO/CPU overload",
+ top->sym_evsel->hists.stats.nr_lost_warned);
+ ++printed;
+ }
+
+ if (top->sym_filter_entry) {
+ perf_top__show_details(top);
+ return;
+ }
+
+ hists__collapse_resort_threaded(&top->sym_evsel->hists);
+ hists__output_resort_threaded(&top->sym_evsel->hists);
+ hists__decay_entries_threaded(&top->sym_evsel->hists,
+ top->hide_user_symbols,
+ top->hide_kernel_symbols);
+ hists__output_recalc_col_len(&top->sym_evsel->hists,
+ top->winsize.ws_row - 3);
+ putchar('\n');
+ hists__fprintf(&top->sym_evsel->hists, NULL, false, false,
+ top->winsize.ws_row - 4 - printed, win_width, stdout);
+}
+
+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 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(&top->sym_evsel->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->nr_entries > 1)
+ fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_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->sym_pcnt_filter);
+ 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 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->nr_entries > 1 ? 1 : 0;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static void perf_top__handle_keypress(struct perf_top *top, int c)
+{
+ if (!perf_top__key_mapped(top, c)) {
+ struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
+ struct termios tc, save;
+
+ perf_top__print_mapped_keys(top);
+ fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
+ fflush(stdout);
+
+ tcgetattr(0, &save);
+ tc = save;
+ tc.c_lflag &= ~(ICANON | ECHO);
+ tc.c_cc[VMIN] = 0;
+ tc.c_cc[VTIME] = 0;
+ tcsetattr(0, TCSANOW, &tc);
+
+ poll(&stdin_poll, 1, -1);
+ c = getc(stdin);
+
+ tcsetattr(0, TCSAFLUSH, &save);
+ if (!perf_top__key_mapped(top, c))
+ return;
+ }
+
+ 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) {
+ struct sigaction act = {
+ .sa_sigaction = perf_top__sig_winch,
+ .sa_flags = SA_SIGINFO,
+ };
+ perf_top__sig_winch(SIGWINCH, NULL, top);
+ sigaction(SIGWINCH, &act, NULL);
+ } else {
+ perf_top__sig_winch(SIGWINCH, NULL, top);
+ signal(SIGWINCH, SIG_DFL);
+ }
+ break;
+ case 'E':
+ if (top->evlist->nr_entries > 1) {
+ /* Select 0 as the default event: */
+ int counter = 0;
+
+ fprintf(stderr, "\nAvailable events:");
+
+ list_for_each_entry(top->sym_evsel, &top->evlist->entries, node)
+ fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, event_name(top->sym_evsel));
+
+ prompt_integer(&counter, "Enter details event counter");
+
+ if (counter >= top->evlist->nr_entries) {
+ top->sym_evsel = list_entry(top->evlist->entries.next, struct perf_evsel, node);
+ fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(top->sym_evsel));
+ sleep(1);
+ break;
+ }
+ list_for_each_entry(top->sym_evsel, &top->evlist->entries, node)
+ if (top->sym_evsel->idx == counter)
+ break;
+ } else
+ top->sym_evsel = list_entry(top->evlist->entries.next, struct perf_evsel, node);
+ break;
+ case 'f':
+ prompt_integer(&top->count_filter, "Enter display event count filter");
+ break;
+ case 'F':
+ prompt_percent(&top->sym_pcnt_filter,
+ "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);
+ exit(0);
+ 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;
+ }
+}
+
+static void perf_top__sort_new_samples(void *arg)
+{
+ struct perf_top *t = arg;
+ perf_top__reset_sample_counters(t);
+
+ if (t->evlist->selected != NULL)
+ t->sym_evsel = t->evlist->selected;
+
+ hists__collapse_resort_threaded(&t->sym_evsel->hists);
+ hists__output_resort_threaded(&t->sym_evsel->hists);
+ hists__decay_entries_threaded(&t->sym_evsel->hists,
+ t->hide_user_symbols,
+ t->hide_kernel_symbols);
+}
+
+static void *display_thread_tui(void *arg)
+{
+ struct perf_evsel *pos;
+ struct perf_top *top = arg;
+ const char *help = "For a higher level overview, try: perf top --sort comm,dso";
+
+ perf_top__sort_new_samples(top);
+
+ /*
+ * Initialize the uid_filter_str, in the future the TUI will allow
+ * Zooming in/out UIDs. For now juse use whatever the user passed
+ * via --uid.
+ */
+ list_for_each_entry(pos, &top->evlist->entries, node)
+ pos->hists.uid_filter_str = top->uid_str;
+
+ perf_evlist__tui_browse_hists(top->evlist, help,
+ perf_top__sort_new_samples,
+ top, top->delay_secs);
+
+ exit_browser(0);
+ exit(0);
+ return NULL;
+}
+
+static void *display_thread(void *arg)
+{
+ struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
+ struct termios tc, save;
+ struct perf_top *top = arg;
+ int delay_msecs, c;
+
+ tcgetattr(0, &save);
+ tc = save;
+ tc.c_lflag &= ~(ICANON | ECHO);
+ tc.c_cc[VMIN] = 0;
+ tc.c_cc[VTIME] = 0;
+
+ pthread__unblock_sigwinch();
+repeat:
+ delay_msecs = top->delay_secs * 1000;
+ tcsetattr(0, TCSANOW, &tc);
+ /* trash return*/
+ getc(stdin);
+
+ while (1) {
+ 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;
+ /* Fall trhu */
+ default:
+ goto process_hotkey;
+ }
+ }
+process_hotkey:
+ c = getc(stdin);
+ tcsetattr(0, TCSAFLUSH, &save);
+
+ perf_top__handle_keypress(top, c);
+ goto repeat;
+
+ return NULL;
+}
+
+/* Tag samples to be skipped. */
+static const char *skip_symbols[] = {
+ "intel_idle",
+ "default_idle",
+ "native_safe_halt",
+ "cpu_idle",
+ "enter_idle",
+ "exit_idle",
+ "mwait_idle",
+ "mwait_idle_with_hints",
+ "poll_idle",
+ "ppc64_runlatch_off",
+ "pseries_dedicated_idle_sleep",
+ NULL
+};
+
+static int symbol_filter(struct map *map __used, struct symbol *sym)
+{
+ const char *name = sym->name;
+ int i;
+
+ /*
+ * ppc64 uses function descriptors and appends a '.' to the
+ * start of every instruction address. Remove it.
+ */
+ if (name[0] == '.')
+ name++;
+
+ if (!strcmp(name, "_text") ||
+ !strcmp(name, "_etext") ||
+ !strcmp(name, "_sinittext") ||
+ !strncmp("init_module", name, 11) ||
+ !strncmp("cleanup_module", name, 14) ||
+ strstr(name, "_text_start") ||
+ strstr(name, "_text_end"))
+ return 1;
+
+ for (i = 0; skip_symbols[i]; i++) {
+ if (!strcmp(skip_symbols[i], name)) {
+ sym->ignore = true;
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static void perf_event__process_sample(struct perf_tool *tool,
+ const union perf_event *event,
+ struct perf_evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct perf_top *top = container_of(tool, struct perf_top, tool);
+ struct symbol *parent = NULL;
+ u64 ip = event->ip.ip;
+ struct addr_location al;
+ int err;
+
+ if (!machine && perf_guest) {
+ pr_err("Can't find guest [%d]'s kernel information\n",
+ event->ip.pid);
+ return;
+ }
+
+ if (!machine) {
+ pr_err("%u unprocessable samples recorded.",
+ top->session->hists.stats.nr_unprocessable_samples++);
+ return;
+ }
+
+ if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
+ top->exact_samples++;
+
+ if (perf_event__preprocess_sample(event, machine, &al, sample,
+ symbol_filter) < 0 ||
+ al.filtered)
+ return;
+
+ if (!top->kptr_restrict_warned &&
+ symbol_conf.kptr_restrict &&
+ al.cpumode == PERF_RECORD_MISC_KERNEL) {
+ ui__warning(
+"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
+"Check /proc/sys/kernel/kptr_restrict.\n\n"
+"Kernel%s samples will not be resolved.\n",
+ !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
+ " modules" : "");
+ if (use_browser <= 0)
+ sleep(5);
+ top->kptr_restrict_warned = true;
+ }
+
+ if (al.sym == 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 (!top->kptr_restrict_warned && !top->vmlinux_warned &&
+ al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
+ RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
+ if (symbol_conf.vmlinux_name) {
+ ui__warning("The %s file can't be used.\n%s",
+ symbol_conf.vmlinux_name, 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->ignore) {
+ struct hist_entry *he;
+
+ if ((sort__has_parent || symbol_conf.use_callchain) &&
+ sample->callchain) {
+ err = machine__resolve_callchain(machine, evsel, al.thread,
+ sample->callchain, &parent);
+ if (err)
+ return;
+ }
+
+ he = perf_evsel__add_hist_entry(evsel, &al, sample);
+ if (he == NULL) {
+ pr_err("Problem incrementing symbol period, skipping event\n");
+ return;
+ }
+
+ if (symbol_conf.use_callchain) {
+ err = callchain_append(he->callchain, &evsel->hists.callchain_cursor,
+ sample->period);
+ if (err)
+ return;
+ }
+
+ if (top->sort_has_symbols)
+ perf_top__record_precise_ip(top, he, evsel->idx, ip);
+ }
+
+ return;
+}
+
+static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
+{
+ struct perf_sample sample;
+ struct perf_evsel *evsel;
+ struct perf_session *session = top->session;
+ union perf_event *event;
+ struct machine *machine;
+ u8 origin;
+ int ret;
+
+ while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
+ ret = perf_session__parse_sample(session, event, &sample);
+ if (ret) {
+ pr_err("Can't parse sample, err = %d\n", ret);
+ continue;
+ }
+
+ evsel = perf_evlist__id2evsel(session->evlist, sample.id);
+ assert(evsel != NULL);
+
+ origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
+
+ if (event->header.type == PERF_RECORD_SAMPLE)
+ ++top->samples;
+
+ switch (origin) {
+ case PERF_RECORD_MISC_USER:
+ ++top->us_samples;
+ if (top->hide_user_symbols)
+ continue;
+ machine = perf_session__find_host_machine(session);
+ break;
+ case PERF_RECORD_MISC_KERNEL:
+ ++top->kernel_samples;
+ if (top->hide_kernel_symbols)
+ continue;
+ machine = perf_session__find_host_machine(session);
+ break;
+ case PERF_RECORD_MISC_GUEST_KERNEL:
+ ++top->guest_kernel_samples;
+ machine = perf_session__find_machine(session, event->ip.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.
+ */
+ /* Fall thru */
+ default:
+ continue;
+ }
+
+
+ if (event->header.type == PERF_RECORD_SAMPLE) {
+ perf_event__process_sample(&top->tool, event, evsel,
+ &sample, machine);
+ } else if (event->header.type < PERF_RECORD_MAX) {
+ hists__inc_nr_events(&evsel->hists, event->header.type);
+ perf_event__process(&top->tool, event, &sample, machine);
+ } else
+ ++session->hists.stats.nr_unknown_events;
+ }
+}
+
+static void perf_top__mmap_read(struct perf_top *top)
+{
+ int i;
+
+ for (i = 0; i < top->evlist->nr_mmaps; i++)
+ perf_top__mmap_read_idx(top, i);
+}
+
+static void perf_top__start_counters(struct perf_top *top)
+{
+ struct perf_evsel *counter, *first;
+ struct perf_evlist *evlist = top->evlist;
+
+ first = list_entry(evlist->entries.next, struct perf_evsel, node);
+
+ list_for_each_entry(counter, &evlist->entries, node) {
+ struct perf_event_attr *attr = &counter->attr;
+ struct xyarray *group_fd = NULL;
+
+ if (top->group && counter != first)
+ group_fd = first->fd;
+
+ attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
+
+ if (top->freq) {
+ attr->sample_type |= PERF_SAMPLE_PERIOD;
+ attr->freq = 1;
+ attr->sample_freq = top->freq;
+ }
+
+ if (evlist->nr_entries > 1) {
+ attr->sample_type |= PERF_SAMPLE_ID;
+ attr->read_format |= PERF_FORMAT_ID;
+ }
+
+ if (symbol_conf.use_callchain)
+ attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
+
+ attr->mmap = 1;
+ attr->comm = 1;
+ attr->inherit = top->inherit;
+fallback_missing_features:
+ if (top->exclude_guest_missing)
+ attr->exclude_guest = attr->exclude_host = 0;
+retry_sample_id:
+ attr->sample_id_all = top->sample_id_all_missing ? 0 : 1;
+try_again:
+ if (perf_evsel__open(counter, top->evlist->cpus,
+ top->evlist->threads, top->group,
+ group_fd) < 0) {
+ int err = errno;
+
+ if (err == EPERM || err == EACCES) {
+ ui__error_paranoid();
+ goto out_err;
+ } else if (err == EINVAL) {
+ if (!top->exclude_guest_missing &&
+ (attr->exclude_guest || attr->exclude_host)) {
+ pr_debug("Old kernel, cannot exclude "
+ "guest or host samples.\n");
+ top->exclude_guest_missing = true;
+ goto fallback_missing_features;
+ } else if (!top->sample_id_all_missing) {
+ /*
+ * Old kernel, no attr->sample_id_type_all field
+ */
+ top->sample_id_all_missing = true;
+ goto retry_sample_id;
+ }
+ }
+ /*
+ * If it's cycles then fall back to hrtimer
+ * based cpu-clock-tick sw counter, which
+ * is always available even if no PMU support:
+ */
+ if (attr->type == PERF_TYPE_HARDWARE &&
+ attr->config == PERF_COUNT_HW_CPU_CYCLES) {
+ if (verbose)
+ ui__warning("Cycles event not supported,\n"
+ "trying to fall back to cpu-clock-ticks\n");
+
+ attr->type = PERF_TYPE_SOFTWARE;
+ attr->config = PERF_COUNT_SW_CPU_CLOCK;
+ goto try_again;
+ }
+
+ if (err == ENOENT) {
+ ui__warning("The %s event is not supported.\n",
+ event_name(counter));
+ goto out_err;
+ } else if (err == EMFILE) {
+ ui__warning("Too many events are opened.\n"
+ "Try again after reducing the number of events\n");
+ goto out_err;
+ }
+
+ ui__warning("The sys_perf_event_open() syscall "
+ "returned with %d (%s). /bin/dmesg "
+ "may provide additional information.\n"
+ "No CONFIG_PERF_EVENTS=y kernel support "
+ "configured?\n", err, strerror(err));
+ goto out_err;
+ }
+ }
+
+ if (perf_evlist__mmap(evlist, top->mmap_pages, false) < 0) {
+ ui__warning("Failed to mmap with %d (%s)\n",
+ errno, strerror(errno));
+ goto out_err;
+ }
+
+ return;
+
+out_err:
+ exit_browser(0);
+ exit(0);
+}
+
+static int perf_top__setup_sample_type(struct perf_top *top)
+{
+ if (!top->sort_has_symbols) {
+ if (symbol_conf.use_callchain) {
+ ui__warning("Selected -g but \"sym\" not present in --sort/-s.");
+ return -EINVAL;
+ }
+ } else if (!top->dont_use_callchains && callchain_param.mode != CHAIN_NONE) {
+ if (callchain_register_param(&callchain_param) < 0) {
+ ui__warning("Can't register callchain params.\n");
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static int __cmd_top(struct perf_top *top)
+{
+ pthread_t thread;
+ int ret;
+ /*
+ * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
+ * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
+ */
+ top->session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
+ if (top->session == NULL)
+ return -ENOMEM;
+
+ ret = perf_top__setup_sample_type(top);
+ if (ret)
+ goto out_delete;
+
+ if (top->target_tid || top->uid != UINT_MAX)
+ perf_event__synthesize_thread_map(&top->tool, top->evlist->threads,
+ perf_event__process,
+ &top->session->host_machine);
+ else
+ perf_event__synthesize_threads(&top->tool, perf_event__process,
+ &top->session->host_machine);
+ perf_top__start_counters(top);
+ top->session->evlist = top->evlist;
+ perf_session__update_sample_type(top->session);
+
+ /* Wait for a minimal set of events before starting the snapshot */
+ poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
+
+ perf_top__mmap_read(top);
+
+ if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
+ display_thread), top)) {
+ printf("Could not create display thread.\n");
+ exit(-1);
+ }
+
+ if (top->realtime_prio) {
+ struct sched_param param;
+
+ param.sched_priority = top->realtime_prio;
+ if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
+ printf("Could not set realtime priority.\n");
+ exit(-1);
+ }
+ }
+
+ while (1) {
+ u64 hits = top->samples;
+
+ perf_top__mmap_read(top);
+
+ if (hits == top->samples)
+ ret = poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
+ }
+
+out_delete:
+ perf_session__delete(top->session);
+ top->session = NULL;
+
+ return 0;
+}
+
+static int
+parse_callchain_opt(const struct option *opt, const char *arg, int unset)
+{
+ struct perf_top *top = (struct perf_top *)opt->value;
+ char *tok, *tok2;
+ char *endptr;
+
+ /*
+ * --no-call-graph
+ */
+ if (unset) {
+ top->dont_use_callchains = true;
+ return 0;
+ }
+
+ symbol_conf.use_callchain = true;
+
+ if (!arg)
+ return 0;
+
+ tok = strtok((char *)arg, ",");
+ if (!tok)
+ return -1;
+
+ /* get the output mode */
+ if (!strncmp(tok, "graph", strlen(arg)))
+ callchain_param.mode = CHAIN_GRAPH_ABS;
+
+ else if (!strncmp(tok, "flat", strlen(arg)))
+ callchain_param.mode = CHAIN_FLAT;
+
+ else if (!strncmp(tok, "fractal", strlen(arg)))
+ callchain_param.mode = CHAIN_GRAPH_REL;
+
+ else if (!strncmp(tok, "none", strlen(arg))) {
+ callchain_param.mode = CHAIN_NONE;
+ symbol_conf.use_callchain = false;
+
+ return 0;
+ } else
+ return -1;
+
+ /* get the min percentage */
+ tok = strtok(NULL, ",");
+ if (!tok)
+ goto setup;
+
+ callchain_param.min_percent = strtod(tok, &endptr);
+ if (tok == endptr)
+ return -1;
+
+ /* get the print limit */
+ tok2 = strtok(NULL, ",");
+ if (!tok2)
+ goto setup;
+
+ if (tok2[0] != 'c') {
+ callchain_param.print_limit = strtod(tok2, &endptr);
+ tok2 = strtok(NULL, ",");
+ if (!tok2)
+ goto setup;
+ }
+
+ /* get the call chain order */
+ if (!strcmp(tok2, "caller"))
+ callchain_param.order = ORDER_CALLER;
+ else if (!strcmp(tok2, "callee"))
+ callchain_param.order = ORDER_CALLEE;
+ else
+ return -1;
+setup:
+ if (callchain_register_param(&callchain_param) < 0) {
+ fprintf(stderr, "Can't register callchain params\n");
+ return -1;
+ }
+ return 0;
+}
+
+static const char * const top_usage[] = {
+ "perf top [<options>]",
+ NULL
+};
+
+int cmd_top(int argc, const char **argv, const char *prefix __used)
+{
+ struct perf_evsel *pos;
+ int status = -ENOMEM;
+ struct perf_top top = {
+ .count_filter = 5,
+ .delay_secs = 2,
+ .uid = UINT_MAX,
+ .freq = 1000, /* 1 KHz */
+ .mmap_pages = 128,
+ .sym_pcnt_filter = 5,
+ };
+ char callchain_default_opt[] = "fractal,0.5,callee";
+ const struct option options[] = {
+ OPT_CALLBACK('e', "event", &top.evlist, "event",
+ "event selector. use 'perf list' to list available events",
+ parse_events_option),
+ OPT_INTEGER('c', "count", &top.default_interval,
+ "event period to sample"),
+ OPT_STRING('p', "pid", &top.target_pid, "pid",
+ "profile events on existing process id"),
+ OPT_STRING('t', "tid", &top.target_tid, "tid",
+ "profile events on existing thread id"),
+ OPT_BOOLEAN('a', "all-cpus", &top.system_wide,
+ "system-wide collection from all CPUs"),
+ OPT_STRING('C', "cpu", &top.cpu_list, "cpu",
+ "list of cpus to monitor"),
+ OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
+ "file", "vmlinux pathname"),
+ OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
+ "hide kernel symbols"),
+ OPT_UINTEGER('m', "mmap-pages", &top.mmap_pages, "number of mmap data 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('g', "group", &top.group,
+ "put the counters into a counter group"),
+ OPT_BOOLEAN('i', "inherit", &top.inherit,
+ "child tasks 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_INTEGER('F', "freq", &top.freq,
+ "profile at this frequency"),
+ OPT_INTEGER('E', "entries", &top.print_entries,
+ "display this many functions"),
+ OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
+ "hide user symbols"),
+ OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
+ 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"),
+ OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
+ "Show a column with the number of samples"),
+ OPT_CALLBACK_DEFAULT('G', "call-graph", &top, "output_type,min_percent, call_order",
+ "Display callchains using output_type (graph, flat, fractal, or none), min percent threshold and callchain order. "
+ "Default: fractal,0.5,callee", &parse_callchain_opt,
+ callchain_default_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", &symbol_conf.annotate_src,
+ "Interleave source code with assembly code (default)"),
+ OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
+ "Display raw encoding of assembly instructions (default)"),
+ OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
+ "Specify disassembler style (e.g. -M intel for intel syntax)"),
+ OPT_STRING('u', "uid", &top.uid_str, "user", "user to profile"),
+ OPT_END()
+ };
+
+ top.evlist = perf_evlist__new(NULL, NULL);
+ if (top.evlist == NULL)
+ return -ENOMEM;
+
+ symbol_conf.exclude_other = false;
+
+ argc = parse_options(argc, argv, options, top_usage, 0);
+ if (argc)
+ usage_with_options(top_usage, options);
+
+ if (sort_order == default_sort_order)
+ sort_order = "dso,symbol";
+
+ setup_sorting(top_usage, options);
+
+ if (top.use_stdio)
+ use_browser = 0;
+ else if (top.use_tui)
+ use_browser = 1;
+
+ setup_browser(false);
+
+ top.uid = parse_target_uid(top.uid_str, top.target_tid, top.target_pid);
+ if (top.uid_str != NULL && top.uid == UINT_MAX - 1)
+ goto out_delete_evlist;
+
+ /* CPU and PID are mutually exclusive */
+ if (top.target_tid && top.cpu_list) {
+ printf("WARNING: PID switch overriding CPU\n");
+ sleep(1);
+ top.cpu_list = NULL;
+ }
+
+ if (top.target_pid)
+ top.target_tid = top.target_pid;
+
+ if (perf_evlist__create_maps(top.evlist, top.target_pid,
+ top.target_tid, top.uid, top.cpu_list) < 0)
+ usage_with_options(top_usage, options);
+
+ if (!top.evlist->nr_entries &&
+ perf_evlist__add_default(top.evlist) < 0) {
+ pr_err("Not enough memory for event selector list\n");
+ return -ENOMEM;
+ }
+
+ symbol_conf.nr_events = top.evlist->nr_entries;
+
+ if (top.delay_secs < 1)
+ top.delay_secs = 1;
+
+ /*
+ * User specified count overrides default frequency.
+ */
+ if (top.default_interval)
+ top.freq = 0;
+ else if (top.freq) {
+ top.default_interval = top.freq;
+ } else {
+ fprintf(stderr, "frequency and count are zero, aborting\n");
+ exit(EXIT_FAILURE);
+ }
+
+ list_for_each_entry(pos, &top.evlist->entries, node) {
+ /*
+ * Fill in the ones not specifically initialized via -c:
+ */
+ if (!pos->attr.sample_period)
+ pos->attr.sample_period = top.default_interval;
+ }
+
+ top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
+
+ symbol_conf.priv_size = sizeof(struct annotation);
+
+ symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
+ if (symbol__init() < 0)
+ return -1;
+
+ sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
+ sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);
+ sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
+
+ /*
+ * Avoid annotation data structures overhead when symbols aren't on the
+ * sort list.
+ */
+ top.sort_has_symbols = sort_sym.list.next != NULL;
+
+ get_term_dimensions(&top.winsize);
+ if (top.print_entries == 0) {
+ struct sigaction act = {
+ .sa_sigaction = perf_top__sig_winch,
+ .sa_flags = SA_SIGINFO,
+ };
+ perf_top__update_print_entries(&top);
+ sigaction(SIGWINCH, &act, NULL);
+ }
+
+ status = __cmd_top(&top);
+
+out_delete_evlist:
+ perf_evlist__delete(top.evlist);
+
+ return status;
+}