1231 строка
31 KiB
C
1231 строка
31 KiB
C
/*
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* builtin-top.c
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*
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* Builtin top command: Display a continuously updated profile of
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* any workload, CPU or specific PID.
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*
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* Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
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* 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Improvements and fixes by:
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*
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* Arjan van de Ven <arjan@linux.intel.com>
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* Yanmin Zhang <yanmin.zhang@intel.com>
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* Wu Fengguang <fengguang.wu@intel.com>
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* Mike Galbraith <efault@gmx.de>
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* Paul Mackerras <paulus@samba.org>
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include "builtin.h"
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#include "perf.h"
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#include "util/annotate.h"
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#include "util/cache.h"
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#include "util/color.h"
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#include "util/evlist.h"
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#include "util/evsel.h"
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#include "util/machine.h"
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#include "util/session.h"
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#include "util/symbol.h"
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#include "util/thread.h"
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#include "util/thread_map.h"
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#include "util/top.h"
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#include "util/util.h"
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#include <linux/rbtree.h>
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#include "util/parse-options.h"
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#include "util/parse-events.h"
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#include "util/cpumap.h"
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#include "util/xyarray.h"
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#include "util/sort.h"
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#include "util/intlist.h"
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#include "util/debug.h"
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#include <assert.h>
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#include <elf.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <termios.h>
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#include <unistd.h>
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#include <inttypes.h>
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#include <errno.h>
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#include <time.h>
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#include <sched.h>
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#include <sys/syscall.h>
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#include <sys/ioctl.h>
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#include <sys/poll.h>
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#include <sys/prctl.h>
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#include <sys/wait.h>
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#include <sys/uio.h>
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#include <sys/utsname.h>
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#include <sys/mman.h>
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#include <linux/unistd.h>
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#include <linux/types.h>
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static volatile int done;
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static void perf_top__update_print_entries(struct perf_top *top)
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{
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if (top->print_entries > 9)
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top->print_entries -= 9;
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}
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static void perf_top__sig_winch(int sig __maybe_unused,
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siginfo_t *info __maybe_unused, void *arg)
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{
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struct perf_top *top = arg;
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get_term_dimensions(&top->winsize);
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if (!top->print_entries
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|| (top->print_entries+4) > top->winsize.ws_row) {
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top->print_entries = top->winsize.ws_row;
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} else {
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top->print_entries += 4;
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top->winsize.ws_row = top->print_entries;
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}
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perf_top__update_print_entries(top);
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}
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static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
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{
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struct symbol *sym;
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struct annotation *notes;
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struct map *map;
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int err = -1;
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if (!he || !he->ms.sym)
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return -1;
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sym = he->ms.sym;
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map = he->ms.map;
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/*
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* We can't annotate with just /proc/kallsyms
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*/
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if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS) {
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pr_err("Can't annotate %s: No vmlinux file was found in the "
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"path\n", sym->name);
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sleep(1);
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return -1;
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}
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notes = symbol__annotation(sym);
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if (notes->src != NULL) {
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pthread_mutex_lock(¬es->lock);
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goto out_assign;
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}
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pthread_mutex_lock(¬es->lock);
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if (symbol__alloc_hist(sym) < 0) {
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pthread_mutex_unlock(¬es->lock);
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pr_err("Not enough memory for annotating '%s' symbol!\n",
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sym->name);
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sleep(1);
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return err;
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}
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err = symbol__annotate(sym, map, 0);
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if (err == 0) {
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out_assign:
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top->sym_filter_entry = he;
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}
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pthread_mutex_unlock(¬es->lock);
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return err;
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}
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static void __zero_source_counters(struct hist_entry *he)
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{
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struct symbol *sym = he->ms.sym;
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symbol__annotate_zero_histograms(sym);
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}
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static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
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{
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struct utsname uts;
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int err = uname(&uts);
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ui__warning("Out of bounds address found:\n\n"
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"Addr: %" PRIx64 "\n"
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"DSO: %s %c\n"
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"Map: %" PRIx64 "-%" PRIx64 "\n"
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"Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
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"Arch: %s\n"
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"Kernel: %s\n"
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"Tools: %s\n\n"
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"Not all samples will be on the annotation output.\n\n"
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"Please report to linux-kernel@vger.kernel.org\n",
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ip, map->dso->long_name, dso__symtab_origin(map->dso),
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map->start, map->end, sym->start, sym->end,
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sym->binding == STB_GLOBAL ? 'g' :
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sym->binding == STB_LOCAL ? 'l' : 'w', sym->name,
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err ? "[unknown]" : uts.machine,
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err ? "[unknown]" : uts.release, perf_version_string);
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if (use_browser <= 0)
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sleep(5);
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map->erange_warned = true;
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}
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static void perf_top__record_precise_ip(struct perf_top *top,
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struct hist_entry *he,
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int counter, u64 ip)
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{
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struct annotation *notes;
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struct symbol *sym;
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int err;
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if (he == NULL || he->ms.sym == NULL ||
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((top->sym_filter_entry == NULL ||
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top->sym_filter_entry->ms.sym != he->ms.sym) && use_browser != 1))
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return;
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sym = he->ms.sym;
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notes = symbol__annotation(sym);
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if (pthread_mutex_trylock(¬es->lock))
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return;
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if (notes->src == NULL && symbol__alloc_hist(sym) < 0) {
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pthread_mutex_unlock(¬es->lock);
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pr_err("Not enough memory for annotating '%s' symbol!\n",
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sym->name);
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sleep(1);
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return;
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}
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ip = he->ms.map->map_ip(he->ms.map, ip);
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err = symbol__inc_addr_samples(sym, he->ms.map, counter, ip);
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pthread_mutex_unlock(¬es->lock);
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if (err == -ERANGE && !he->ms.map->erange_warned)
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ui__warn_map_erange(he->ms.map, sym, ip);
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}
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static void perf_top__show_details(struct perf_top *top)
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{
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struct hist_entry *he = top->sym_filter_entry;
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struct annotation *notes;
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struct symbol *symbol;
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int more;
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if (!he)
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return;
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symbol = he->ms.sym;
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notes = symbol__annotation(symbol);
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pthread_mutex_lock(¬es->lock);
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if (notes->src == NULL)
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goto out_unlock;
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printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name);
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printf(" Events Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
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more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel->idx,
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0, top->sym_pcnt_filter, top->print_entries, 4);
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if (top->zero)
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symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
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else
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symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
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if (more != 0)
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printf("%d lines not displayed, maybe increase display entries [e]\n", more);
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out_unlock:
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pthread_mutex_unlock(¬es->lock);
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}
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static const char CONSOLE_CLEAR[] = "[H[2J";
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static struct hist_entry *perf_evsel__add_hist_entry(struct perf_evsel *evsel,
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struct addr_location *al,
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struct perf_sample *sample)
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{
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struct hist_entry *he;
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he = __hists__add_entry(&evsel->hists, al, NULL, sample->period);
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if (he == NULL)
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return NULL;
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hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
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return he;
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}
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static void perf_top__print_sym_table(struct perf_top *top)
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{
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char bf[160];
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int printed = 0;
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const int win_width = top->winsize.ws_col - 1;
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puts(CONSOLE_CLEAR);
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perf_top__header_snprintf(top, bf, sizeof(bf));
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printf("%s\n", bf);
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perf_top__reset_sample_counters(top);
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printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
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if (top->sym_evsel->hists.stats.nr_lost_warned !=
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top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]) {
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top->sym_evsel->hists.stats.nr_lost_warned =
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top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST];
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color_fprintf(stdout, PERF_COLOR_RED,
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"WARNING: LOST %d chunks, Check IO/CPU overload",
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top->sym_evsel->hists.stats.nr_lost_warned);
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++printed;
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}
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if (top->sym_filter_entry) {
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perf_top__show_details(top);
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return;
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}
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hists__collapse_resort_threaded(&top->sym_evsel->hists);
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hists__output_resort_threaded(&top->sym_evsel->hists);
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hists__decay_entries_threaded(&top->sym_evsel->hists,
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top->hide_user_symbols,
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top->hide_kernel_symbols);
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hists__output_recalc_col_len(&top->sym_evsel->hists,
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top->winsize.ws_row - 3);
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putchar('\n');
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hists__fprintf(&top->sym_evsel->hists, false,
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top->winsize.ws_row - 4 - printed, win_width, stdout);
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}
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static void prompt_integer(int *target, const char *msg)
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{
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char *buf = malloc(0), *p;
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size_t dummy = 0;
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int tmp;
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fprintf(stdout, "\n%s: ", msg);
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if (getline(&buf, &dummy, stdin) < 0)
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return;
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p = strchr(buf, '\n');
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if (p)
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*p = 0;
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p = buf;
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while(*p) {
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if (!isdigit(*p))
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goto out_free;
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p++;
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}
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tmp = strtoul(buf, NULL, 10);
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*target = tmp;
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out_free:
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free(buf);
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}
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static void prompt_percent(int *target, const char *msg)
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{
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int tmp = 0;
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prompt_integer(&tmp, msg);
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if (tmp >= 0 && tmp <= 100)
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*target = tmp;
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}
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static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
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{
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char *buf = malloc(0), *p;
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struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
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struct rb_node *next;
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size_t dummy = 0;
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/* zero counters of active symbol */
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if (syme) {
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__zero_source_counters(syme);
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top->sym_filter_entry = NULL;
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}
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fprintf(stdout, "\n%s: ", msg);
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if (getline(&buf, &dummy, stdin) < 0)
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goto out_free;
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p = strchr(buf, '\n');
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if (p)
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*p = 0;
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next = rb_first(&top->sym_evsel->hists.entries);
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while (next) {
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n = rb_entry(next, struct hist_entry, rb_node);
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if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
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found = n;
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break;
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}
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next = rb_next(&n->rb_node);
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}
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if (!found) {
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fprintf(stderr, "Sorry, %s is not active.\n", buf);
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sleep(1);
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} else
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perf_top__parse_source(top, found);
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out_free:
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free(buf);
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}
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static void perf_top__print_mapped_keys(struct perf_top *top)
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{
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char *name = NULL;
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if (top->sym_filter_entry) {
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struct symbol *sym = top->sym_filter_entry->ms.sym;
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name = sym->name;
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}
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fprintf(stdout, "\nMapped keys:\n");
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fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs);
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fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries);
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if (top->evlist->nr_entries > 1)
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fprintf(stdout, "\t[E] active event counter. \t(%s)\n", perf_evsel__name(top->sym_evsel));
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fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter);
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fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter);
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fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
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fprintf(stdout, "\t[S] stop annotation.\n");
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fprintf(stdout,
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"\t[K] hide kernel_symbols symbols. \t(%s)\n",
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top->hide_kernel_symbols ? "yes" : "no");
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fprintf(stdout,
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"\t[U] hide user symbols. \t(%s)\n",
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top->hide_user_symbols ? "yes" : "no");
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fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0);
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fprintf(stdout, "\t[qQ] quit.\n");
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}
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static int perf_top__key_mapped(struct perf_top *top, int c)
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{
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switch (c) {
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case 'd':
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case 'e':
|
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case 'f':
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case 'z':
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case 'q':
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case 'Q':
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case 'K':
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case 'U':
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case 'F':
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case 's':
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case 'S':
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return 1;
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case 'E':
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return top->evlist->nr_entries > 1 ? 1 : 0;
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default:
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break;
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}
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return 0;
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}
|
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|
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static bool perf_top__handle_keypress(struct perf_top *top, int c)
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{
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bool ret = true;
|
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|
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if (!perf_top__key_mapped(top, c)) {
|
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struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
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struct termios tc, save;
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|
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perf_top__print_mapped_keys(top);
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fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
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fflush(stdout);
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tcgetattr(0, &save);
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tc = save;
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tc.c_lflag &= ~(ICANON | ECHO);
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tc.c_cc[VMIN] = 0;
|
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tc.c_cc[VTIME] = 0;
|
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tcsetattr(0, TCSANOW, &tc);
|
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|
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poll(&stdin_poll, 1, -1);
|
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c = getc(stdin);
|
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|
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tcsetattr(0, TCSAFLUSH, &save);
|
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if (!perf_top__key_mapped(top, c))
|
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return ret;
|
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}
|
||
|
||
switch (c) {
|
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case 'd':
|
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prompt_integer(&top->delay_secs, "Enter display delay");
|
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if (top->delay_secs < 1)
|
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top->delay_secs = 1;
|
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break;
|
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case 'e':
|
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prompt_integer(&top->print_entries, "Enter display entries (lines)");
|
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if (top->print_entries == 0) {
|
||
struct sigaction act = {
|
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.sa_sigaction = perf_top__sig_winch,
|
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.sa_flags = SA_SIGINFO,
|
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};
|
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perf_top__sig_winch(SIGWINCH, NULL, top);
|
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sigaction(SIGWINCH, &act, NULL);
|
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} else {
|
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perf_top__sig_winch(SIGWINCH, NULL, top);
|
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signal(SIGWINCH, SIG_DFL);
|
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}
|
||
break;
|
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case 'E':
|
||
if (top->evlist->nr_entries > 1) {
|
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/* Select 0 as the default event: */
|
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int counter = 0;
|
||
|
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fprintf(stderr, "\nAvailable events:");
|
||
|
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list_for_each_entry(top->sym_evsel, &top->evlist->entries, node)
|
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fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel));
|
||
|
||
prompt_integer(&counter, "Enter details event counter");
|
||
|
||
if (counter >= top->evlist->nr_entries) {
|
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top->sym_evsel = perf_evlist__first(top->evlist);
|
||
fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__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 = perf_evlist__first(top->evlist);
|
||
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);
|
||
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;
|
||
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";
|
||
struct hist_browser_timer hbt = {
|
||
.timer = perf_top__sort_new_samples,
|
||
.arg = top,
|
||
.refresh = top->delay_secs,
|
||
};
|
||
|
||
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->record_opts.target.uid_str;
|
||
|
||
perf_evlist__tui_browse_hists(top->evlist, help, &hbt,
|
||
&top->session->header.env);
|
||
|
||
done = 1;
|
||
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 (!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;
|
||
/* Fall trhu */
|
||
default:
|
||
c = getc(stdin);
|
||
tcsetattr(0, TCSAFLUSH, &save);
|
||
|
||
if (perf_top__handle_keypress(top, c))
|
||
goto repeat;
|
||
done = 1;
|
||
}
|
||
}
|
||
|
||
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 __maybe_unused, 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) {
|
||
static struct intlist *seen;
|
||
|
||
if (!seen)
|
||
seen = intlist__new(NULL);
|
||
|
||
if (!intlist__has_entry(seen, event->ip.pid)) {
|
||
pr_err("Can't find guest [%d]'s kernel information\n",
|
||
event->ip.pid);
|
||
intlist__add(seen, event->ip.pid);
|
||
}
|
||
return;
|
||
}
|
||
|
||
if (!machine) {
|
||
pr_err("%u unprocessable samples recorded.\r",
|
||
top->session->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,
|
||
&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, &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_evlist__parse_sample(top->evlist, 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 = &session->machines.host;
|
||
break;
|
||
case PERF_RECORD_MISC_KERNEL:
|
||
++top->kernel_samples;
|
||
if (top->hide_kernel_symbols)
|
||
continue;
|
||
machine = &session->machines.host;
|
||
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);
|
||
machine__process_event(machine, event);
|
||
} else
|
||
++session->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 int perf_top__start_counters(struct perf_top *top)
|
||
{
|
||
char msg[512];
|
||
struct perf_evsel *counter;
|
||
struct perf_evlist *evlist = top->evlist;
|
||
struct perf_record_opts *opts = &top->record_opts;
|
||
|
||
perf_evlist__config(evlist, opts);
|
||
|
||
list_for_each_entry(counter, &evlist->entries, node) {
|
||
try_again:
|
||
if (perf_evsel__open(counter, top->evlist->cpus,
|
||
top->evlist->threads) < 0) {
|
||
if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
|
||
if (verbose)
|
||
ui__warning("%s\n", msg);
|
||
goto try_again;
|
||
}
|
||
|
||
perf_evsel__open_strerror(counter, &opts->target,
|
||
errno, msg, sizeof(msg));
|
||
ui__error("%s\n", msg);
|
||
goto out_err;
|
||
}
|
||
}
|
||
|
||
if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
|
||
ui__error("Failed to mmap with %d (%s)\n",
|
||
errno, strerror(errno));
|
||
goto out_err;
|
||
}
|
||
|
||
return 0;
|
||
|
||
out_err:
|
||
return -1;
|
||
}
|
||
|
||
static int perf_top__setup_sample_type(struct perf_top *top)
|
||
{
|
||
if (!top->sort_has_symbols) {
|
||
if (symbol_conf.use_callchain) {
|
||
ui__error("Selected -g but \"sym\" not present in --sort/-s.");
|
||
return -EINVAL;
|
||
}
|
||
} else if (callchain_param.mode != CHAIN_NONE) {
|
||
if (callchain_register_param(&callchain_param) < 0) {
|
||
ui__error("Can't register callchain params.\n");
|
||
return -EINVAL;
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int __cmd_top(struct perf_top *top)
|
||
{
|
||
struct perf_record_opts *opts = &top->record_opts;
|
||
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 (perf_target__has_task(&opts->target))
|
||
perf_event__synthesize_thread_map(&top->tool, top->evlist->threads,
|
||
perf_event__process,
|
||
&top->session->machines.host);
|
||
else
|
||
perf_event__synthesize_threads(&top->tool, perf_event__process,
|
||
&top->session->machines.host);
|
||
|
||
ret = perf_top__start_counters(top);
|
||
if (ret)
|
||
goto out_delete;
|
||
|
||
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 (!perf_target__none(&opts->target))
|
||
perf_evlist__enable(top->evlist);
|
||
|
||
/* 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);
|
||
|
||
ret = -1;
|
||
if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
|
||
display_thread), top)) {
|
||
ui__error("Could not create display thread.\n");
|
||
goto out_delete;
|
||
}
|
||
|
||
if (top->realtime_prio) {
|
||
struct sched_param param;
|
||
|
||
param.sched_priority = top->realtime_prio;
|
||
if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
|
||
ui__error("Could not set realtime priority.\n");
|
||
goto out_delete;
|
||
}
|
||
}
|
||
|
||
while (!done) {
|
||
u64 hits = top->samples;
|
||
|
||
perf_top__mmap_read(top);
|
||
|
||
if (hits == top->samples)
|
||
ret = poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
|
||
}
|
||
|
||
ret = 0;
|
||
out_delete:
|
||
perf_session__delete(top->session);
|
||
top->session = NULL;
|
||
|
||
return ret;
|
||
}
|
||
|
||
static int
|
||
parse_callchain_opt(const struct option *opt, const char *arg, int unset)
|
||
{
|
||
/*
|
||
* --no-call-graph
|
||
*/
|
||
if (unset)
|
||
return 0;
|
||
|
||
symbol_conf.use_callchain = true;
|
||
|
||
return record_parse_callchain_opt(opt, arg, unset);
|
||
}
|
||
|
||
int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
|
||
{
|
||
int status;
|
||
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,
|
||
},
|
||
},
|
||
.sym_pcnt_filter = 5,
|
||
};
|
||
struct perf_record_opts *opts = &top.record_opts;
|
||
struct perf_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('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
|
||
"hide kernel symbols"),
|
||
OPT_UINTEGER('m', "mmap-pages", &opts->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", &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_UINTEGER('F', "freq", &opts->user_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.record_opts,
|
||
"mode[,dump_size]", record_callchain_help,
|
||
&parse_callchain_opt, "fp"),
|
||
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", &target->uid_str, "user", "user to profile"),
|
||
OPT_END()
|
||
};
|
||
const char * const top_usage[] = {
|
||
"perf top [<options>]",
|
||
NULL
|
||
};
|
||
|
||
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";
|
||
|
||
if (setup_sorting() < 0)
|
||
usage_with_options(top_usage, options);
|
||
|
||
if (top.use_stdio)
|
||
use_browser = 0;
|
||
else if (top.use_tui)
|
||
use_browser = 1;
|
||
|
||
setup_browser(false);
|
||
|
||
status = perf_target__validate(target);
|
||
if (status) {
|
||
perf_target__strerror(target, status, errbuf, BUFSIZ);
|
||
ui__warning("%s", errbuf);
|
||
}
|
||
|
||
status = perf_target__parse_uid(target);
|
||
if (status) {
|
||
int saved_errno = errno;
|
||
|
||
perf_target__strerror(target, status, errbuf, BUFSIZ);
|
||
ui__error("%s", errbuf);
|
||
|
||
status = -saved_errno;
|
||
goto out_delete_evlist;
|
||
}
|
||
|
||
if (perf_target__none(target))
|
||
target->system_wide = true;
|
||
|
||
if (perf_evlist__create_maps(top.evlist, target) < 0)
|
||
usage_with_options(top_usage, options);
|
||
|
||
if (!top.evlist->nr_entries &&
|
||
perf_evlist__add_default(top.evlist) < 0) {
|
||
ui__error("Not enough memory for event selector list\n");
|
||
goto out_delete_maps;
|
||
}
|
||
|
||
symbol_conf.nr_events = top.evlist->nr_entries;
|
||
|
||
if (top.delay_secs < 1)
|
||
top.delay_secs = 1;
|
||
|
||
if (opts->user_interval != ULLONG_MAX)
|
||
opts->default_interval = opts->user_interval;
|
||
if (opts->user_freq != UINT_MAX)
|
||
opts->freq = opts->user_freq;
|
||
|
||
/*
|
||
* User specified count overrides default frequency.
|
||
*/
|
||
if (opts->default_interval)
|
||
opts->freq = 0;
|
||
else if (opts->freq) {
|
||
opts->default_interval = opts->freq;
|
||
} else {
|
||
ui__error("frequency and count are zero, aborting\n");
|
||
status = -EINVAL;
|
||
goto out_delete_maps;
|
||
}
|
||
|
||
top.sym_evsel = perf_evlist__first(top.evlist);
|
||
|
||
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_maps:
|
||
perf_evlist__delete_maps(top.evlist);
|
||
out_delete_evlist:
|
||
perf_evlist__delete(top.evlist);
|
||
|
||
return status;
|
||
}
|