perf tools: Delay loading symtabs till we hit a map with it
So that we can have a quicker start on perf top and even
speedups in the other tools, as we can have maps with no hits,
so no need to load its symtabs.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <1256773881-4191-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 2ae1177..3064a05 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -106,10 +106,11 @@
typedef int (*symbol_filter_t)(struct map *map, struct symbol *sym);
struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen,
- unsigned int sym_priv_size, symbol_filter_t filter);
+ unsigned int sym_priv_size);
struct map *map__clone(struct map *self);
int map__overlap(struct map *l, struct map *r);
size_t map__fprintf(struct map *self, FILE *fp);
+struct symbol *map__find_symbol(struct map *self, u64 ip, symbol_filter_t filter);
int event__synthesize_thread(pid_t pid, int (*process)(event_t *event));
void event__synthesize_threads(int (*process)(event_t *event));
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index c1c5568..d302e51 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -21,7 +21,7 @@
}
struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen,
- unsigned int sym_priv_size, symbol_filter_t filter)
+ unsigned int sym_priv_size)
{
struct map *self = malloc(sizeof(*self));
@@ -29,7 +29,6 @@
const char *filename = event->filename;
char newfilename[PATH_MAX];
int anon;
- bool new_dso;
if (cwd) {
int n = strcommon(filename, cwd, cwdlen);
@@ -52,23 +51,10 @@
self->end = event->start + event->len;
self->pgoff = event->pgoff;
- self->dso = dsos__findnew(filename, sym_priv_size, &new_dso);
+ self->dso = dsos__findnew(filename, sym_priv_size);
if (self->dso == NULL)
goto out_delete;
- if (new_dso) {
- int nr = dso__load(self->dso, self, filter);
-
- if (nr < 0)
- pr_warning("Failed to open %s, continuing "
- "without symbols\n",
- self->dso->long_name);
- else if (nr == 0)
- pr_warning("No symbols found in %s, maybe "
- "install a debug package?\n",
- self->dso->long_name);
- }
-
if (self->dso == vdso || anon)
self->map_ip = self->unmap_ip = identity__map_ip;
else {
@@ -82,6 +68,26 @@
return NULL;
}
+struct symbol *
+map__find_symbol(struct map *self, u64 ip, symbol_filter_t filter)
+{
+ if (!self->dso->loaded) {
+ int nr = dso__load(self->dso, self, filter);
+
+ if (nr < 0) {
+ pr_warning("Failed to open %s, continuing without symbols\n",
+ self->dso->long_name);
+ return NULL;
+ } else if (nr == 0) {
+ pr_warning("No symbols found in %s, maybe install a debug package?\n",
+ self->dso->long_name);
+ return NULL;
+ }
+ }
+
+ return self->dso->find_symbol(self->dso, ip);
+}
+
struct map *map__clone(struct map *self)
{
struct map *map = malloc(sizeof(*self));
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 8f0208c..0273d83 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -909,6 +909,8 @@
int ret = -1;
int fd;
+ self->loaded = true;
+
if (!name)
return -1;
@@ -1019,6 +1021,8 @@
{
int err = 0, fd = open(self->long_name, O_RDONLY);
+ self->loaded = true;
+
if (fd < 0) {
pr_err("%s: cannot open %s\n", __func__, self->long_name);
return err;
@@ -1214,6 +1218,8 @@
{
int err, fd = open(vmlinux, O_RDONLY);
+ self->loaded = true;
+
if (fd < 0)
return -1;
@@ -1312,19 +1318,15 @@
return NULL;
}
-struct dso *dsos__findnew(const char *name, unsigned int sym_priv_size,
- bool *is_new)
+struct dso *dsos__findnew(const char *name, unsigned int sym_priv_size)
{
struct dso *dso = dsos__find(name);
if (!dso) {
dso = dso__new(name, sym_priv_size);
- if (dso) {
+ if (dso != NULL)
dsos__add(dso);
- *is_new = true;
- }
- } else
- *is_new = false;
+ }
return dso;
}
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 77b7b3e..432edbc 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -46,6 +46,7 @@
unsigned int sym_priv_size;
unsigned char adjust_symbols;
unsigned char slen_calculated;
+ bool loaded;
unsigned char origin;
const char *short_name;
char *long_name;
@@ -64,8 +65,7 @@
int dsos__load_kernel(const char *vmlinux, unsigned int sym_priv_size,
symbol_filter_t filter, int modules);
-struct dso *dsos__findnew(const char *name, unsigned int sym_priv_size,
- bool *is_new);
+struct dso *dsos__findnew(const char *name, unsigned int sym_priv_size);
int dso__load(struct dso *self, struct map *map, symbol_filter_t filter);
void dsos__fprintf(FILE *fp);