perf top: Don't allocate the source parsing members upfront
Defer to parse_source() time allocating it.
Now we use about this much memory:
1724 root 20 0 42104 10m 940 S 0.0 0.4 0:00.23 perf
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1258490282-1821-3-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 49cf876..07b92c3 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -108,6 +108,13 @@
* Symbols
*/
+struct sym_entry_source {
+ struct source_line *source;
+ struct source_line *lines;
+ struct source_line **lines_tail;
+ pthread_mutex_t lock;
+};
+
struct sym_entry {
struct rb_node rb_node;
struct list_head node;
@@ -117,10 +124,7 @@
u16 name_len;
u8 origin;
struct map *map;
- struct source_line *source;
- struct source_line *lines;
- struct source_line **lines_tail;
- pthread_mutex_t source_lock;
+ struct sym_entry_source *src;
unsigned long count[0];
};
@@ -172,6 +176,7 @@
static void parse_source(struct sym_entry *syme)
{
struct symbol *sym;
+ struct sym_entry_source *source;
struct map *map;
FILE *file;
char command[PATH_MAX*2];
@@ -181,8 +186,17 @@
if (!syme)
return;
- if (syme->lines) {
- pthread_mutex_lock(&syme->source_lock);
+ if (syme->src == NULL) {
+ syme->src = calloc(1, sizeof(*source));
+ if (syme->src == NULL)
+ return;
+ pthread_mutex_init(&syme->src->lock, NULL);
+ }
+
+ source = syme->src;
+
+ if (source->lines) {
+ pthread_mutex_lock(&source->lock);
goto out_assign;
}
@@ -202,8 +216,8 @@
if (!file)
return;
- pthread_mutex_lock(&syme->source_lock);
- syme->lines_tail = &syme->lines;
+ pthread_mutex_lock(&source->lock);
+ source->lines_tail = &source->lines;
while (!feof(file)) {
struct source_line *src;
size_t dummy = 0;
@@ -223,8 +237,8 @@
*c = 0;
src->next = NULL;
- *syme->lines_tail = src;
- syme->lines_tail = &src->next;
+ *source->lines_tail = src;
+ source->lines_tail = &src->next;
if (strlen(src->line)>8 && src->line[8] == ':') {
src->eip = strtoull(src->line, NULL, 16);
@@ -238,7 +252,7 @@
pclose(file);
out_assign:
sym_filter_entry = syme;
- pthread_mutex_unlock(&syme->source_lock);
+ pthread_mutex_unlock(&source->lock);
}
static void __zero_source_counters(struct sym_entry *syme)
@@ -246,7 +260,7 @@
int i;
struct source_line *line;
- line = syme->lines;
+ line = syme->src->lines;
while (line) {
for (i = 0; i < nr_counters; i++)
line->count[i] = 0;
@@ -261,13 +275,13 @@
if (syme != sym_filter_entry)
return;
- if (pthread_mutex_trylock(&syme->source_lock))
+ if (pthread_mutex_trylock(&syme->src->lock))
return;
- if (!syme->source)
+ if (syme->src == NULL || syme->src->source == NULL)
goto out_unlock;
- for (line = syme->lines; line; line = line->next) {
+ for (line = syme->src->lines; line; line = line->next) {
if (line->eip == ip) {
line->count[counter]++;
break;
@@ -276,7 +290,7 @@
break;
}
out_unlock:
- pthread_mutex_unlock(&syme->source_lock);
+ pthread_mutex_unlock(&syme->src->lock);
}
static void lookup_sym_source(struct sym_entry *syme)
@@ -287,14 +301,14 @@
sprintf(pattern, "<%s>:", symbol->name);
- pthread_mutex_lock(&syme->source_lock);
- for (line = syme->lines; line; line = line->next) {
+ pthread_mutex_lock(&syme->src->lock);
+ for (line = syme->src->lines; line; line = line->next) {
if (strstr(line->line, pattern)) {
- syme->source = line;
+ syme->src->source = line;
break;
}
}
- pthread_mutex_unlock(&syme->source_lock);
+ pthread_mutex_unlock(&syme->src->lock);
}
static void show_lines(struct source_line *queue, int count, int total)
@@ -324,24 +338,24 @@
if (!syme)
return;
- if (!syme->source)
+ if (!syme->src->source)
lookup_sym_source(syme);
- if (!syme->source)
+ if (!syme->src->source)
return;
symbol = sym_entry__symbol(syme);
printf("Showing %s for %s\n", event_name(sym_counter), symbol->name);
printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter);
- pthread_mutex_lock(&syme->source_lock);
- line = syme->source;
+ pthread_mutex_lock(&syme->src->lock);
+ line = syme->src->source;
while (line) {
total += line->count[sym_counter];
line = line->next;
}
- line = syme->source;
+ line = syme->src->source;
while (line) {
float pcnt = 0.0;
@@ -366,7 +380,7 @@
line->count[sym_counter] = zero ? 0 : line->count[sym_counter] * 7 / 8;
line = line->next;
}
- pthread_mutex_unlock(&syme->source_lock);
+ pthread_mutex_unlock(&syme->src->lock);
if (more)
printf("%d lines not displayed, maybe increase display entries [e]\n", more);
}
@@ -647,10 +661,10 @@
/* zero counters of active symbol */
if (syme) {
- pthread_mutex_lock(&syme->source_lock);
+ pthread_mutex_lock(&syme->src->lock);
__zero_source_counters(syme);
*target = NULL;
- pthread_mutex_unlock(&syme->source_lock);
+ pthread_mutex_unlock(&syme->src->lock);
}
fprintf(stdout, "\n%s: ", msg);
@@ -826,10 +840,10 @@
else {
struct sym_entry *syme = sym_filter_entry;
- pthread_mutex_lock(&syme->source_lock);
+ pthread_mutex_lock(&syme->src->lock);
sym_filter_entry = NULL;
__zero_source_counters(syme);
- pthread_mutex_unlock(&syme->source_lock);
+ pthread_mutex_unlock(&syme->src->lock);
}
break;
case 'U':
@@ -915,7 +929,7 @@
syme = symbol__priv(sym);
syme->map = map;
- pthread_mutex_init(&syme->source_lock, NULL);
+ syme->src = NULL;
if (!sym_filter_entry && sym_filter && !strcmp(name, sym_filter))
sym_filter_entry = syme;