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-rw-r--r--tools/perf/builtin-top.c1139
1 files changed, 1139 insertions, 0 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
new file mode 100644
index 00000000..f2f3f493
--- /dev/null
+++ b/tools/perf/builtin-top.c
@@ -0,0 +1,1139 @@
+/*
+ * 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>
+ *
+ * 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/debug.h"
+
+#include <assert.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/mman.h>
+
+#include <linux/unistd.h>
+#include <linux/types.h>
+
+static struct perf_top top = {
+ .count_filter = 5,
+ .delay_secs = 2,
+ .display_weighted = -1,
+ .target_pid = -1,
+ .target_tid = -1,
+ .active_symbols = LIST_HEAD_INIT(top.active_symbols),
+ .active_symbols_lock = PTHREAD_MUTEX_INITIALIZER,
+ .active_symbols_cond = PTHREAD_COND_INITIALIZER,
+ .freq = 1000, /* 1 KHz */
+};
+
+static bool system_wide = false;
+
+static bool use_tui, use_stdio;
+
+static int default_interval = 0;
+
+static bool kptr_restrict_warned;
+static bool vmlinux_warned;
+static bool inherit = false;
+static int realtime_prio = 0;
+static bool group = false;
+static unsigned int page_size;
+static unsigned int mmap_pages = 128;
+
+static bool dump_symtab = false;
+
+static struct winsize winsize;
+
+static const char *sym_filter = NULL;
+struct sym_entry *sym_filter_entry_sched = NULL;
+static int sym_pcnt_filter = 5;
+
+/*
+ * Source functions
+ */
+
+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 update_print_entries(struct winsize *ws)
+{
+ top.print_entries = ws->ws_row;
+
+ if (top.print_entries > 9)
+ top.print_entries -= 9;
+}
+
+static void sig_winch_handler(int sig __used)
+{
+ get_term_dimensions(&winsize);
+ update_print_entries(&winsize);
+}
+
+static int parse_source(struct sym_entry *syme)
+{
+ struct symbol *sym;
+ struct annotation *notes;
+ struct map *map;
+ int err = -1;
+
+ if (!syme)
+ return -1;
+
+ sym = sym_entry__symbol(syme);
+ map = syme->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(&notes->lock);
+ goto out_assign;
+ }
+
+ pthread_mutex_lock(&notes->lock);
+
+ if (symbol__alloc_hist(sym, top.evlist->nr_entries) < 0) {
+ pthread_mutex_unlock(&notes->lock);
+ pr_err("Not enough memory for annotating '%s' symbol!\n",
+ sym->name);
+ sleep(1);
+ return err;
+ }
+
+ err = symbol__annotate(sym, syme->map, 0);
+ if (err == 0) {
+out_assign:
+ top.sym_filter_entry = syme;
+ }
+
+ pthread_mutex_unlock(&notes->lock);
+ return err;
+}
+
+static void __zero_source_counters(struct sym_entry *syme)
+{
+ struct symbol *sym = sym_entry__symbol(syme);
+ symbol__annotate_zero_histograms(sym);
+}
+
+static void record_precise_ip(struct sym_entry *syme, int counter, u64 ip)
+{
+ struct annotation *notes;
+ struct symbol *sym;
+
+ if (syme != top.sym_filter_entry)
+ return;
+
+ sym = sym_entry__symbol(syme);
+ notes = symbol__annotation(sym);
+
+ if (pthread_mutex_trylock(&notes->lock))
+ return;
+
+ ip = syme->map->map_ip(syme->map, ip);
+ symbol__inc_addr_samples(sym, syme->map, counter, ip);
+
+ pthread_mutex_unlock(&notes->lock);
+}
+
+static void show_details(struct sym_entry *syme)
+{
+ struct annotation *notes;
+ struct symbol *symbol;
+ int more;
+
+ if (!syme)
+ return;
+
+ symbol = sym_entry__symbol(syme);
+ notes = symbol__annotation(symbol);
+
+ pthread_mutex_lock(&notes->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", sym_pcnt_filter);
+
+ more = symbol__annotate_printf(symbol, syme->map, top.sym_evsel->idx,
+ 0, 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(&notes->lock);
+}
+
+static const char CONSOLE_CLEAR[] = "";
+
+static void __list_insert_active_sym(struct sym_entry *syme)
+{
+ list_add(&syme->node, &top.active_symbols);
+}
+
+static void print_sym_table(struct perf_session *session)
+{
+ char bf[160];
+ int printed = 0;
+ struct rb_node *nd;
+ struct sym_entry *syme;
+ struct rb_root tmp = RB_ROOT;
+ const int win_width = winsize.ws_col - 1;
+ int sym_width, dso_width, dso_short_width;
+ float sum_ksamples = perf_top__decay_samples(&top, &tmp);
+
+ 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 (session->hists.stats.total_lost != 0) {
+ color_fprintf(stdout, PERF_COLOR_RED, "WARNING:");
+ printf(" LOST %" PRIu64 " events, Check IO/CPU overload\n",
+ session->hists.stats.total_lost);
+ }
+
+ if (top.sym_filter_entry) {
+ show_details(top.sym_filter_entry);
+ return;
+ }
+
+ perf_top__find_widths(&top, &tmp, &dso_width, &dso_short_width,
+ &sym_width);
+
+ if (sym_width + dso_width > winsize.ws_col - 29) {
+ dso_width = dso_short_width;
+ if (sym_width + dso_width > winsize.ws_col - 29)
+ sym_width = winsize.ws_col - dso_width - 29;
+ }
+ putchar('\n');
+ if (top.evlist->nr_entries == 1)
+ printf(" samples pcnt");
+ else
+ printf(" weight samples pcnt");
+
+ if (verbose)
+ printf(" RIP ");
+ printf(" %-*.*s DSO\n", sym_width, sym_width, "function");
+ printf(" %s _______ _____",
+ top.evlist->nr_entries == 1 ? " " : "______");
+ if (verbose)
+ printf(" ________________");
+ printf(" %-*.*s", sym_width, sym_width, graph_line);
+ printf(" %-*.*s", dso_width, dso_width, graph_line);
+ puts("\n");
+
+ for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
+ struct symbol *sym;
+ double pcnt;
+
+ syme = rb_entry(nd, struct sym_entry, rb_node);
+ sym = sym_entry__symbol(syme);
+ if (++printed > top.print_entries ||
+ (int)syme->snap_count < top.count_filter)
+ continue;
+
+ pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) /
+ sum_ksamples));
+
+ if (top.evlist->nr_entries == 1 || !top.display_weighted)
+ printf("%20.2f ", syme->weight);
+ else
+ printf("%9.1f %10ld ", syme->weight, syme->snap_count);
+
+ percent_color_fprintf(stdout, "%4.1f%%", pcnt);
+ if (verbose)
+ printf(" %016" PRIx64, sym->start);
+ printf(" %-*.*s", sym_width, sym_width, sym->name);
+ printf(" %-*.*s\n", dso_width, dso_width,
+ dso_width >= syme->map->dso->long_name_len ?
+ syme->map->dso->long_name :
+ syme->map->dso->short_name);
+ }
+}
+
+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 prompt_symbol(struct sym_entry **target, const char *msg)
+{
+ char *buf = malloc(0), *p;
+ struct sym_entry *syme = *target, *n, *found = NULL;
+ size_t dummy = 0;
+
+ /* zero counters of active symbol */
+ if (syme) {
+ __zero_source_counters(syme);
+ *target = NULL;
+ }
+
+ fprintf(stdout, "\n%s: ", msg);
+ if (getline(&buf, &dummy, stdin) < 0)
+ goto out_free;
+
+ p = strchr(buf, '\n');
+ if (p)
+ *p = 0;
+
+ pthread_mutex_lock(&top.active_symbols_lock);
+ syme = list_entry(top.active_symbols.next, struct sym_entry, node);
+ pthread_mutex_unlock(&top.active_symbols_lock);
+
+ list_for_each_entry_safe_from(syme, n, &top.active_symbols, node) {
+ struct symbol *sym = sym_entry__symbol(syme);
+
+ if (!strcmp(buf, sym->name)) {
+ found = syme;
+ break;
+ }
+ }
+
+ if (!found) {
+ fprintf(stderr, "Sorry, %s is not active.\n", buf);
+ sleep(1);
+ return;
+ } else
+ parse_source(found);
+
+out_free:
+ free(buf);
+}
+
+static void print_mapped_keys(void)
+{
+ char *name = NULL;
+
+ if (top.sym_filter_entry) {
+ struct symbol *sym = sym_entry__symbol(top.sym_filter_entry);
+ 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", sym_pcnt_filter);
+ fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
+ fprintf(stdout, "\t[S] stop annotation.\n");
+
+ if (top.evlist->nr_entries > 1)
+ fprintf(stdout, "\t[w] toggle display weighted/count[E]r. \t(%d)\n", top.display_weighted ? 1 : 0);
+
+ 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 key_mapped(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':
+ case 'w':
+ return top.evlist->nr_entries > 1 ? 1 : 0;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static void handle_keypress(struct perf_session *session, int c)
+{
+ if (!key_mapped(c)) {
+ struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
+ struct termios tc, save;
+
+ print_mapped_keys();
+ 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 (!key_mapped(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) {
+ sig_winch_handler(SIGWINCH);
+ signal(SIGWINCH, sig_winch_handler);
+ } else
+ 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(&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 (dump_symtab)
+ perf_session__fprintf_dsos(session, stderr);
+ exit(0);
+ case 's':
+ prompt_symbol(&top.sym_filter_entry, "Enter details symbol");
+ break;
+ case 'S':
+ if (!top.sym_filter_entry)
+ break;
+ else {
+ struct sym_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 'w':
+ top.display_weighted = ~top.display_weighted;
+ break;
+ case 'z':
+ top.zero = !top.zero;
+ break;
+ default:
+ break;
+ }
+}
+
+static void *display_thread_tui(void *arg __used)
+{
+ int err = 0;
+ pthread_mutex_lock(&top.active_symbols_lock);
+ while (list_empty(&top.active_symbols)) {
+ err = pthread_cond_wait(&top.active_symbols_cond,
+ &top.active_symbols_lock);
+ if (err)
+ break;
+ }
+ pthread_mutex_unlock(&top.active_symbols_lock);
+ if (!err)
+ perf_top__tui_browser(&top);
+ exit_browser(0);
+ exit(0);
+ return NULL;
+}
+
+static void *display_thread(void *arg __used)
+{
+ struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
+ struct termios tc, save;
+ int delay_msecs, c;
+ struct perf_session *session = (struct perf_session *) arg;
+
+ tcgetattr(0, &save);
+ tc = save;
+ tc.c_lflag &= ~(ICANON | ECHO);
+ tc.c_cc[VMIN] = 0;
+ tc.c_cc[VTIME] = 0;
+
+repeat:
+ delay_msecs = top.delay_secs * 1000;
+ tcsetattr(0, TCSANOW, &tc);
+ /* trash return*/
+ getc(stdin);
+
+ do {
+ print_sym_table(session);
+ } while (!poll(&stdin_poll, 1, delay_msecs) == 1);
+
+ c = getc(stdin);
+ tcsetattr(0, TCSAFLUSH, &save);
+
+ handle_keypress(session, c);
+ goto repeat;
+
+ return NULL;
+}
+
+/* Tag samples to be skipped. */
+static const char *skip_symbols[] = {
+ "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, struct symbol *sym)
+{
+ struct sym_entry *syme;
+ 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;
+
+ syme = symbol__priv(sym);
+ syme->map = map;
+ symbol__annotate_init(map, sym);
+
+ if (!top.sym_filter_entry && sym_filter && !strcmp(name, sym_filter)) {
+ /* schedule initial sym_filter_entry setup */
+ sym_filter_entry_sched = syme;
+ sym_filter = NULL;
+ }
+
+ 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(const union perf_event *event,
+ struct perf_sample *sample,
+ struct perf_session *session)
+{
+ u64 ip = event->ip.ip;
+ struct sym_entry *syme;
+ struct addr_location al;
+ struct machine *machine;
+ u8 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
+
+ ++top.samples;
+
+ switch (origin) {
+ case PERF_RECORD_MISC_USER:
+ ++top.us_samples;
+ if (top.hide_user_symbols)
+ return;
+ machine = perf_session__find_host_machine(session);
+ break;
+ case PERF_RECORD_MISC_KERNEL:
+ ++top.kernel_samples;
+ if (top.hide_kernel_symbols)
+ return;
+ 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.
+ */
+ return;
+ default:
+ return;
+ }
+
+ if (!machine && perf_guest) {
+ pr_err("Can't find guest [%d]'s kernel information\n",
+ event->ip.pid);
+ return;
+ }
+
+ if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
+ top.exact_samples++;
+
+ if (perf_event__preprocess_sample(event, session, &al, sample,
+ symbol_filter) < 0 ||
+ al.filtered)
+ return;
+
+ if (!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);
+ 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 (!kptr_restrict_warned && !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);
+ vmlinux_warned = true;
+ }
+
+ return;
+ }
+
+ /* let's see, whether we need to install initial sym_filter_entry */
+ if (sym_filter_entry_sched) {
+ top.sym_filter_entry = sym_filter_entry_sched;
+ sym_filter_entry_sched = NULL;
+ if (parse_source(top.sym_filter_entry) < 0) {
+ struct symbol *sym = sym_entry__symbol(top.sym_filter_entry);
+
+ pr_err("Can't annotate %s", sym->name);
+ if (top.sym_filter_entry->map->dso->symtab_type == SYMTAB__KALLSYMS) {
+ pr_err(": No vmlinux file was found in the path:\n");
+ machine__fprintf_vmlinux_path(machine, stderr);
+ } else
+ pr_err(".\n");
+ exit(1);
+ }
+ }
+
+ syme = symbol__priv(al.sym);
+ if (!al.sym->ignore) {
+ struct perf_evsel *evsel;
+
+ evsel = perf_evlist__id2evsel(top.evlist, sample->id);
+ assert(evsel != NULL);
+ syme->count[evsel->idx]++;
+ record_precise_ip(syme, evsel->idx, ip);
+ pthread_mutex_lock(&top.active_symbols_lock);
+ if (list_empty(&syme->node) || !syme->node.next) {
+ static bool first = true;
+ __list_insert_active_sym(syme);
+ if (first) {
+ pthread_cond_broadcast(&top.active_symbols_cond);
+ first = false;
+ }
+ }
+ pthread_mutex_unlock(&top.active_symbols_lock);
+ }
+}
+
+static void perf_session__mmap_read_idx(struct perf_session *self, int idx)
+{
+ struct perf_sample sample;
+ union perf_event *event;
+ int ret;
+
+ while ((event = perf_evlist__mmap_read(top.evlist, idx)) != NULL) {
+ ret = perf_session__parse_sample(self, event, &sample);
+ if (ret) {
+ pr_err("Can't parse sample, err = %d\n", ret);
+ continue;
+ }
+
+ if (event->header.type == PERF_RECORD_SAMPLE)
+ perf_event__process_sample(event, &sample, self);
+ else
+ perf_event__process(event, &sample, self);
+ }
+}
+
+static void perf_session__mmap_read(struct perf_session *self)
+{
+ int i;
+
+ for (i = 0; i < top.evlist->nr_mmaps; i++)
+ perf_session__mmap_read_idx(self, i);
+}
+
+static void start_counters(struct perf_evlist *evlist)
+{
+ struct perf_evsel *counter;
+
+ list_for_each_entry(counter, &evlist->entries, node) {
+ struct perf_event_attr *attr = &counter->attr;
+
+ 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;
+ }
+
+ attr->mmap = 1;
+ attr->inherit = inherit;
+try_again:
+ if (perf_evsel__open(counter, top.evlist->cpus,
+ top.evlist->threads, group) < 0) {
+ int err = errno;
+
+ if (err == EPERM || err == EACCES) {
+ ui__warning_paranoid();
+ goto out_err;
+ }
+ /*
+ * 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;
+ }
+
+ 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, 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 __cmd_top(void)
+{
+ pthread_t thread;
+ int ret __used;
+ /*
+ * 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.
+ */
+ struct perf_session *session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
+ if (session == NULL)
+ return -ENOMEM;
+
+ if (top.target_tid != -1)
+ perf_event__synthesize_thread_map(top.evlist->threads,
+ perf_event__process, session);
+ else
+ perf_event__synthesize_threads(perf_event__process, session);
+
+ start_counters(top.evlist);
+ session->evlist = top.evlist;
+ perf_session__update_sample_type(session);
+
+ /* Wait for a minimal set of events before starting the snapshot */
+ poll(top.evlist->pollfd, top.evlist->nr_fds, 100);
+
+ perf_session__mmap_read(session);
+
+ if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
+ display_thread), session)) {
+ printf("Could not create display thread.\n");
+ exit(-1);
+ }
+
+ if (realtime_prio) {
+ struct sched_param param;
+
+ param.sched_priority = realtime_prio;
+ if (sched_setscheduler(0, SCHED_FIFO, &param)) {
+ printf("Could not set realtime priority.\n");
+ exit(-1);
+ }
+ }
+
+ while (1) {
+ u64 hits = top.samples;
+
+ perf_session__mmap_read(session);
+
+ if (hits == top.samples)
+ ret = poll(top.evlist->pollfd, top.evlist->nr_fds, 100);
+ }
+
+ return 0;
+}
+
+static const char * const top_usage[] = {
+ "perf top [<options>]",
+ NULL
+};
+
+static const struct option options[] = {
+ OPT_CALLBACK('e', "event", &top.evlist, "event",
+ "event selector. use 'perf list' to list available events",
+ parse_events),
+ OPT_INTEGER('c', "count", &default_interval,
+ "event period to sample"),
+ OPT_INTEGER('p', "pid", &top.target_pid,
+ "profile events on existing process id"),
+ OPT_INTEGER('t', "tid", &top.target_tid,
+ "profile events on existing thread id"),
+ OPT_BOOLEAN('a', "all-cpus", &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", &mmap_pages, "number of mmap data pages"),
+ OPT_INTEGER('r', "realtime", &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", &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", &group,
+ "put the counters into a counter group"),
+ OPT_BOOLEAN('i', "inherit", &inherit,
+ "child tasks inherit counters"),
+ OPT_STRING('s', "sym-annotate", &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", &use_tui, "Use the TUI interface"),
+ OPT_BOOLEAN(0, "stdio", &use_stdio, "Use the stdio interface"),
+ OPT_INCR('v', "verbose", &verbose,
+ "be more verbose (show counter open errors, etc)"),
+ OPT_END()
+};
+
+int cmd_top(int argc, const char **argv, const char *prefix __used)
+{
+ struct perf_evsel *pos;
+ int status = -ENOMEM;
+
+ top.evlist = perf_evlist__new(NULL, NULL);
+ if (top.evlist == NULL)
+ return -ENOMEM;
+
+ page_size = sysconf(_SC_PAGE_SIZE);
+
+ argc = parse_options(argc, argv, options, top_usage, 0);
+ if (argc)
+ usage_with_options(top_usage, options);
+
+ /*
+ * XXX For now start disabled, only using TUI if explicitely asked for.
+ * Change that when handle_keys equivalent gets written, live annotation
+ * done, etc.
+ */
+ use_browser = 0;
+
+ if (use_stdio)
+ use_browser = 0;
+ else if (use_tui)
+ use_browser = 1;
+
+ setup_browser(false);
+
+ /* CPU and PID are mutually exclusive */
+ if (top.target_tid > 0 && top.cpu_list) {
+ printf("WARNING: PID switch overriding CPU\n");
+ sleep(1);
+ top.cpu_list = NULL;
+ }
+
+ if (top.target_pid != -1)
+ top.target_tid = top.target_pid;
+
+ if (perf_evlist__create_maps(top.evlist, top.target_pid,
+ top.target_tid, 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;
+ }
+
+ if (top.delay_secs < 1)
+ top.delay_secs = 1;
+
+ /*
+ * User specified count overrides default frequency.
+ */
+ if (default_interval)
+ top.freq = 0;
+ else if (top.freq) {
+ 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) {
+ if (perf_evsel__alloc_fd(pos, top.evlist->cpus->nr,
+ top.evlist->threads->nr) < 0)
+ goto out_free_fd;
+ /*
+ * Fill in the ones not specifically initialized via -c:
+ */
+ if (pos->attr.sample_period)
+ continue;
+
+ pos->attr.sample_period = default_interval;
+ }
+
+ if (perf_evlist__alloc_pollfd(top.evlist) < 0 ||
+ perf_evlist__alloc_mmap(top.evlist) < 0)
+ goto out_free_fd;
+
+ top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
+
+ symbol_conf.priv_size = (sizeof(struct sym_entry) + sizeof(struct annotation) +
+ (top.evlist->nr_entries + 1) * sizeof(unsigned long));
+
+ symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
+ if (symbol__init() < 0)
+ return -1;
+
+ get_term_dimensions(&winsize);
+ if (top.print_entries == 0) {
+ update_print_entries(&winsize);
+ signal(SIGWINCH, sig_winch_handler);
+ }
+
+ status = __cmd_top();
+out_free_fd:
+ perf_evlist__delete(top.evlist);
+
+ return status;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-10 03:39:01 +0000