forked from Minki/linux
ca6a42586f
Resend of patch sent back in January 2011 in light of recent confusion around
unsupported events for a given platform.
Improve sys_perf_event_open ENOENT return handling in top and record, just
like 5a3446b does for stat.
Retry of Arnaldo's patch using ui_warning instead of die which allows the
fallback from hardware cycles to software clock.
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
LKML-Reference: <1301080271-20945-1-git-send-email-daahern@cisco.com>
Signed-off-by: David Ahern <daahern@cisco.com>
[ committer note: Some adjustments to make it apply to newer codebase ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1111 lines
27 KiB
C
1111 lines
27 KiB
C
/*
|
||
* 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>
|
||
|
||
#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
|
||
|
||
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 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(¬es->lock);
|
||
goto out_assign;
|
||
}
|
||
|
||
pthread_mutex_lock(¬es->lock);
|
||
|
||
if (symbol__alloc_hist(sym, top.evlist->nr_entries) < 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, syme->map, 0);
|
||
if (err == 0) {
|
||
out_assign:
|
||
top.sym_filter_entry = syme;
|
||
}
|
||
|
||
pthread_mutex_unlock(¬es->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(¬es->lock))
|
||
return;
|
||
|
||
ip = syme->map->map_ip(syme->map, ip);
|
||
symbol__inc_addr_samples(sym, syme->map, counter, ip);
|
||
|
||
pthread_mutex_unlock(¬es->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(¬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", 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(¬es->lock);
|
||
}
|
||
|
||
static const char CONSOLE_CLEAR[] = "[H[2J";
|
||
|
||
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 (al.sym == NULL) {
|
||
/*
|
||
* 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 (al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
|
||
RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
|
||
ui__warning("The %s file can't be used\n",
|
||
symbol_conf.vmlinux_name);
|
||
exit_browser(0);
|
||
exit(1);
|
||
}
|
||
|
||
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_cpu(struct perf_session *self, int cpu)
|
||
{
|
||
struct perf_sample sample;
|
||
union perf_event *event;
|
||
|
||
while ((event = perf_evlist__read_on_cpu(top.evlist, cpu)) != NULL) {
|
||
perf_session__parse_sample(self, event, &sample);
|
||
|
||
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->cpus->nr; i++)
|
||
perf_session__mmap_read_cpu(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;
|
||
try_again:
|
||
if (perf_evsel__open(counter, top.evlist->cpus,
|
||
top.evlist->threads, group, inherit) < 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, ¶m)) {
|
||
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;
|
||
}
|