kpriv/linux-hardened
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

perf top: Ditch private annotation code, share perf annotate's

Browse source 
Next step: Live TUI annotation in perf top, just press enter on a symbol
line.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2011-02-06 14:54:44 -02:00
parent f1e2701de0
commit 36532461a0
4 changed files with 106 additions and 173 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

181
tools/perf/builtin-top.c
View file

@ -20,6 +20,7 @@
#include "perf.h"
#include "util/annotate.h"
#include "util/cache.h"
#include "util/color.h"
#include "util/evlist.h"
@ -140,10 +141,7 @@ static int parse_source(struct sym_entry *syme)
struct symbol *sym;
struct sym_entry_source *source;
struct map *map;
FILE *file;
char command[PATH_MAX*2];
const char *path;
u64 len;
int err = -1;
if (!syme)
return -1;
@ -162,197 +160,80 @@ static int parse_source(struct sym_entry *syme)
if (syme->src == NULL)
return -1;
pthread_mutex_init(&syme->src->lock, NULL);
INIT_LIST_HEAD(&syme->src->head);
}
source = syme->src;
if (source->lines) {
if (symbol__annotation(sym)->histograms != NULL) {
pthread_mutex_lock(&source->lock);
goto out_assign;
}
path = map->dso->long_name;
len = sym->end - sym->start;
sprintf(command,
"objdump --start-address=%#0*" PRIx64 " --stop-address=%#0*" PRIx64 " -dS %s",
BITS_PER_LONG / 4, map__rip_2objdump(map, sym->start),
BITS_PER_LONG / 4, map__rip_2objdump(map, sym->end), path);
file = popen(command, "r");
if (!file)
return -1;
pthread_mutex_lock(&source->lock);
source->lines_tail = &source->lines;
while (!feof(file)) {
struct source_line *src;
size_t dummy = 0;
char *c, *sep;
src = malloc(sizeof(struct source_line));
assert(src != NULL);
memset(src, 0, sizeof(struct source_line));
if (getline(&src->line, &dummy, file) < 0)
break;
if (!src->line)
break;
c = strchr(src->line, '\n');
if (c)
*c = 0;
src->next = NULL;
*source->lines_tail = src;
source->lines_tail = &src->next;
src->eip = strtoull(src->line, &sep, 16);
if (*sep == ':')
src->eip = map__objdump_2ip(map, src->eip);
else /* this line has no ip info (e.g. source line) */
src->eip = 0;
if (symbol__alloc_hist(sym, top.evlist->nr_entries) < 0) {
pr_err("Not enough memory for annotating '%s' symbol!\n",
sym->name);
goto out_unlock;
}
pclose(file);
err = symbol__annotate(sym, syme->map, &source->head, 0);
if (err == 0) {
out_assign:
sym_filter_entry = syme;
}
out_unlock:
pthread_mutex_unlock(&source->lock);
return 0;
return err;
}
static void __zero_source_counters(struct sym_entry *syme)
{
int i;
struct source_line *line;
line = syme->src->lines;
while (line) {
for (i = 0; i < top.evlist->nr_entries; i++)
line->count[i] = 0;
line = line->next;
}
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 source_line *line;
if (syme != sym_filter_entry)
return;
if (pthread_mutex_trylock(&syme->src->lock))
return;
if (syme->src == NULL || syme->src->source == NULL)
goto out_unlock;
ip = syme->map->map_ip(syme->map, ip);
symbol__inc_addr_samples(sym_entry__symbol(syme), syme->map, counter, ip);
for (line = syme->src->lines; line; line = line->next) {
/* skip lines without IP info */
if (line->eip == 0)
continue;
if (line->eip == ip) {
line->count[counter]++;
break;
}
if (line->eip > ip)
break;
}
out_unlock:
pthread_mutex_unlock(&syme->src->lock);
}
#define PATTERN_LEN (BITS_PER_LONG / 4 + 2)
static void lookup_sym_source(struct sym_entry *syme)
{
struct symbol *symbol = sym_entry__symbol(syme);
struct source_line *line;
char pattern[PATTERN_LEN + 1];
sprintf(pattern, "%0*" PRIx64 " <", BITS_PER_LONG / 4,
map__rip_2objdump(syme->map, symbol->start));
pthread_mutex_lock(&syme->src->lock);
for (line = syme->src->lines; line; line = line->next) {
if (memcmp(line->line, pattern, PATTERN_LEN) == 0) {
syme->src->source = line;
break;
}
}
pthread_mutex_unlock(&syme->src->lock);
}
static void show_lines(struct source_line *queue, int count, int total)
{
int i;
struct source_line *line;
line = queue;
for (i = 0; i < count; i++) {
float pcnt = 100.0*(float)line->count[top.sym_counter]/(float)total;
printf("%8li %4.1f%%\t%s\n", line->count[top.sym_counter], pcnt, line->line);
line = line->next;
}
}
#define TRACE_COUNT 3
static void show_details(struct sym_entry *syme)
{
struct symbol *symbol;
struct source_line *line;
struct source_line *line_queue = NULL;
int displayed = 0;
int line_queue_count = 0, total = 0, more = 0;
int more;
if (!syme)
return;
if (!syme->src->source)
lookup_sym_source(syme);
if (!syme->src->source)
symbol = sym_entry__symbol(syme);
if (!syme->src || symbol__annotation(symbol)->histograms == NULL)
return;
symbol = sym_entry__symbol(syme);
printf("Showing %s for %s\n", event_name(top.sym_evsel), symbol->name);
printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter);
pthread_mutex_lock(&syme->src->lock);
line = syme->src->source;
while (line) {
total += line->count[top.sym_counter];
line = line->next;
}
line = syme->src->source;
while (line) {
float pcnt = 0.0;
if (!line_queue_count)
line_queue = line;
line_queue_count++;
if (line->count[top.sym_counter])
pcnt = 100.0 * line->count[top.sym_counter] / (float)total;
if (pcnt >= (float)sym_pcnt_filter) {
if (displayed <= top.print_entries)
show_lines(line_queue, line_queue_count, total);
else more++;
displayed += line_queue_count;
line_queue_count = 0;
line_queue = NULL;
} else if (line_queue_count > TRACE_COUNT) {
line_queue = line_queue->next;
line_queue_count--;
}
line->count[top.sym_counter] = top.zero ? 0 : line->count[top.sym_counter] * 7 / 8;
line = line->next;
}
more = symbol__annotate_printf(symbol, syme->map, &syme->src->head,
top.sym_evsel->idx, 0, sym_pcnt_filter,
top.print_entries);
if (top.zero)
symbol__annotate_zero_histogram(symbol, top.sym_evsel->idx);
else
symbol__annotate_decay_histogram(symbol, &syme->src->head,
top.sym_evsel->idx);
pthread_mutex_unlock(&syme->src->lock);
if (more)
if (more != 0)
printf("%d lines not displayed, maybe increase display entries [e]\n", more);
}
@ -1172,7 +1053,7 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
symbol_conf.priv_size = (sizeof(struct sym_entry) +
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);

76
tools/perf/util/annotate.c
View file

@ -22,9 +22,19 @@ int symbol__alloc_hist(struct symbol *sym, int nevents)
notes->sizeof_sym_hist = (sizeof(*notes->histograms) +
(sym->end - sym->start) * sizeof(u64));
notes->histograms = calloc(nevents, notes->sizeof_sym_hist);
notes->nr_histograms = nevents;
return notes->histograms == NULL ? -1 : 0;
}
void symbol__annotate_zero_histograms(struct symbol *sym)
{
struct annotation *notes = symbol__annotation(sym);
if (notes->histograms != NULL)
memset(notes->histograms, 0,
notes->nr_histograms * notes->sizeof_sym_hist);
}
int symbol__inc_addr_samples(struct symbol *sym, struct map *map,
int evidx, u64 addr)
{
@ -85,9 +95,10 @@ struct objdump_line *objdump__get_next_ip_line(struct list_head *head,
return NULL;
}
static void objdump_line__print(struct objdump_line *oline,
struct list_head *head, struct symbol *sym,
int evidx, u64 len, int min_pcnt)
static int objdump_line__print(struct objdump_line *oline,
struct list_head *head, struct symbol *sym,
int evidx, u64 len, int min_pcnt,
int printed, int max_lines)
{
static const char *prev_line;
static const char *prev_color;
@ -119,7 +130,10 @@ static void objdump_line__print(struct objdump_line *oline,
percent = 100.0 * hits / h->sum;
if (percent < min_pcnt)
return;
return -1;
if (printed >= max_lines)
return 1;
color = get_percent_color(percent);
@ -140,12 +154,16 @@ static void objdump_line__print(struct objdump_line *oline,
color_fprintf(stdout, color, " %7.2f", percent);
printf(" : ");
color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", oline->line);
} else {
} else if (printed >= max_lines)
return 1;
else {
if (!*oline->line)
printf(" :\n");
else
printf(" : %s\n", oline->line);
}
return 0;
}
static int symbol__parse_objdump_line(struct symbol *sym, struct map *map, FILE *file,
@ -421,14 +439,15 @@ static void symbol__annotate_hits(struct symbol *sym, int evidx)
printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum);
}
void symbol__annotate_printf(struct symbol *sym, struct map *map,
struct list_head *head, int evidx, bool full_paths,
int min_pcnt, int max_lines)
int symbol__annotate_printf(struct symbol *sym, struct map *map,
struct list_head *head, int evidx, bool full_paths,
int min_pcnt, int max_lines)
{
struct dso *dso = map->dso;
const char *filename = dso->long_name, *d_filename;
struct objdump_line *pos;
int printed = 2;
int more = 0;
u64 len;
if (full_paths)
@ -445,10 +464,47 @@ void symbol__annotate_printf(struct symbol *sym, struct map *map,
symbol__annotate_hits(sym, evidx);
list_for_each_entry(pos, head, node) {
objdump_line__print(pos, head, sym, evidx, len, min_pcnt);
if (max_lines && ++printed >= max_lines)
switch (objdump_line__print(pos, head, sym, evidx, len, min_pcnt,
printed, max_lines)) {
case 0:
++printed;
break;
case 1:
/* filtered by max_lines */
++more;
break;
case -1:
default:
/* filtered by min_pcnt */
break;
}
}
return more;
}
void symbol__annotate_zero_histogram(struct symbol *sym, int evidx)
{
struct annotation *notes = symbol__annotation(sym);
struct sym_hist *h = annotation__histogram(notes, evidx);
memset(h, 0, notes->sizeof_sym_hist);
}
void symbol__annotate_decay_histogram(struct symbol *sym,
struct list_head *head, int evidx)
{
struct annotation *notes = symbol__annotation(sym);
struct sym_hist *h = annotation__histogram(notes, evidx);
struct objdump_line *pos;
h->sum = 0;
list_for_each_entry(pos, head, node) {
if (pos->offset != -1) {
h->addr[pos->offset] = h->addr[pos->offset] * 7 / 8;
h->sum += h->addr[pos->offset];
}
}
}

11
tools/perf/util/annotate.h
View file

@ -42,6 +42,7 @@ struct source_line {
struct annotation {
struct source_line *src_line;
struct sym_hist *histograms;
int nr_histograms;
int sizeof_sym_hist;
};
@ -64,12 +65,16 @@ static inline struct annotation *symbol__annotation(struct symbol *sym)
int symbol__inc_addr_samples(struct symbol *sym, struct map *map,
int evidx, u64 addr);
int symbol__alloc_hist(struct symbol *sym, int nevents);
void symbol__annotate_zero_histograms(struct symbol *sym);
int symbol__annotate(struct symbol *sym, struct map *map,
struct list_head *head, size_t privsize);
void symbol__annotate_printf(struct symbol *sym, struct map *map,
struct list_head *head, int evidx, bool full_paths,
int min_pcnt, int max_lines);
int symbol__annotate_printf(struct symbol *sym, struct map *map,
struct list_head *head, int evidx, bool full_paths,
int min_pcnt, int max_lines);
void symbol__annotate_zero_histogram(struct symbol *sym, int evidx);
void symbol__annotate_decay_histogram(struct symbol *sym,
struct list_head *head, int evidx);
void objdump_line_list__purge(struct list_head *head);
int symbol__tty_annotate(struct symbol *sym, struct map *map, int evidx,

11
tools/perf/util/top.h
View file

@ -11,17 +11,8 @@
struct perf_evlist;
struct perf_evsel;
struct source_line {
u64 eip;
unsigned long count[MAX_COUNTERS]; /* FIXME */
char *line;
struct source_line *next;
};
struct sym_entry_source {
struct source_line *source;
struct source_line *lines;
struct source_line **lines_tail;
struct list_head head;
pthread_mutex_t lock;
};