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/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 6d63c2e..8688bfe 100644 (file)
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -165,7 +165,7 @@ process_sample_event(event_t *event, unsigned long offset, unsigned long head)
                if (map != NULL) {
 got_map:
                        ip = map->map_ip(map, ip);
-                       sym = map->dso->find_symbol(map->dso, ip);
+                       sym = map__find_symbol(map, ip, symbol_filter);
                } else {
                        /*
                         * If this is outside of all known maps,
@@ -203,7 +203,7 @@ static int
 process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
 {
        struct map *map = map__new(&event->mmap, NULL, 0,
-                                  sizeof(struct sym_priv), symbol_filter);
+                                  sizeof(struct sym_priv));
        struct thread *thread = threads__findnew(event->mmap.pid);
 
        dump_printf("%p [%p]: PERF_RECORD_MMAP %d: [%p(%p) @ %p]: %s\n",

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index b3d814b..f1bcd35 100644 (file)
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -455,7 +455,7 @@ got_map:
        dump_printf(" ...... map: %Lx -> %Lx\n", *ipp, ip);
        *ipp  = ip;
 
-       return map ? map->dso->find_symbol(map->dso, ip) : NULL;
+       return map ? map__find_symbol(map, ip, NULL) : NULL;
 }
 
 static int call__match(struct symbol *sym)
@@ -751,7 +751,7 @@ process_sample_event(event_t *event, unsigned long offset, unsigned long head)
 static int
 process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
 {
-       struct map *map = map__new(&event->mmap, cwd, cwdlen, 0, NULL);
+       struct map *map = map__new(&event->mmap, cwd, cwdlen, 0);
        struct thread *thread = threads__findnew(event->mmap.pid);
 
        dump_printf("%p [%p]: PERF_RECORD_MMAP %d/%d: [%p(%p) @ %p]: %s\n",

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index a02fc41..ee87640 100644 (file)
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -834,7 +834,7 @@ static void event__process_sample(const event_t *self, int counter)
                map = thread__find_map(thread, ip);
                if (map != NULL) {
                        ip = map->map_ip(map, ip);
-                       sym = map->dso->find_symbol(map->dso, ip);
+                       sym = map__find_symbol(map, ip, symbol_filter);
                        if (sym == NULL)
                                return;
                        userspace_samples++;
@@ -879,8 +879,7 @@ static void event__process_mmap(event_t *self)
 
        if (thread != NULL) {
                struct map *map = map__new(&self->mmap, NULL, 0,
-                                          sizeof(struct sym_entry),
-                                          symbol_filter);
+                                          sizeof(struct sym_entry));
                if (map != NULL)
                        thread__insert_map(thread, map);
        }

diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 2ae1177..3064a05 100644 (file)
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -106,10 +106,11 @@ struct symbol;
 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 (file)
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -21,7 +21,7 @@ static int strcommon(const char *pathname, char *cwd, int cwdlen)
 }
 
 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 @@ struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen,
                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 @@ struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen,
                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 @@ out_delete:
        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 (file)
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -909,6 +909,8 @@ int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
        int ret = -1;
        int fd;
 
+       self->loaded = true;
+
        if (!name)
                return -1;
 
@@ -1019,6 +1021,8 @@ static int dso__load_module_sym(struct dso *self, struct map *map,
 {
        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 @@ static int dso__load_vmlinux(struct dso *self, struct map *map,
 {
        int err, fd = open(vmlinux, O_RDONLY);
 
+       self->loaded = true;
+
        if (fd < 0)
                return -1;
 
@@ -1312,19 +1318,15 @@ static struct dso *dsos__find(const char *name)
        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 (file)
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -46,6 +46,7 @@ struct dso {
        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 @@ struct symbol *dso__find_symbol(struct dso *self, u64 ip);
 
 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);