perf annotate: Separate objdump parsing from actual screen rendering

Because in 'perf top' we'll need to parse just once and then, as samples
come, render multiple times with evolving counter values.

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>

2 files changed, 47 insertions, 19 deletions

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 072bc8d91aa1..10cdbad76058 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -421,21 +421,16 @@ static void symbol__annotate_hits(struct symbol *sym, int evidx)
         printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum);
 }
 
-int symbol__tty_annotate(struct symbol *sym, struct map *map, int evidx,
-                         bool print_lines, bool full_paths, int min_pcnt,
-                         int max_lines)
+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)
 {
         struct dso *dso = map->dso;
         const char *filename = dso->long_name, *d_filename;
-        struct rb_root source_line = RB_ROOT;
-        struct objdump_line *pos, *n;
-        LIST_HEAD(head);
+        struct objdump_line *pos;
         int printed = 2;
         u64 len;
 
-        if (symbol__annotate(sym, map, &head, 0) < 0)
-                return -1;
-
         if (full_paths)
                 d_filename = filename;
         else
@@ -443,28 +438,57 @@ int symbol__tty_annotate(struct symbol *sym, struct map *map, int evidx,
 
         len = sym->end - sym->start;
 
-        if (print_lines) {
-                symbol__get_source_line(sym, map, evidx, &source_line,
-                                        len, filename);
-                print_summary(&source_line, filename);
-        }
-
         printf(" Percent |      Source code & Disassembly of %s\n", d_filename);
         printf("------------------------------------------------\n");
 
         if (verbose)
                 symbol__annotate_hits(sym, evidx);
 
-        list_for_each_entry_safe(pos, n, &head, node) {
-                objdump_line__print(pos, &head, sym, evidx, len, min_pcnt);
-                list_del(&pos->node);
-                objdump_line__free(pos);
+        list_for_each_entry(pos, head, node) {
+                objdump_line__print(pos, head, sym, evidx, len, min_pcnt);
                 if (max_lines && ++printed >= max_lines)
                         break;
+
+        }
+}
+
+void objdump_line_list__purge(struct list_head *head)
+{
+        struct objdump_line *pos, *n;
+
+        list_for_each_entry_safe(pos, n, head, node) {
+                list_del(&pos->node);
+                objdump_line__free(pos);
+        }
+}
+
+int symbol__tty_annotate(struct symbol *sym, struct map *map, int evidx,
+                         bool print_lines, bool full_paths, int min_pcnt,
+                         int max_lines)
+{
+        struct dso *dso = map->dso;
+        const char *filename = dso->long_name;
+        struct rb_root source_line = RB_ROOT;
+        LIST_HEAD(head);
+        u64 len;
+
+        if (symbol__annotate(sym, map, &head, 0) < 0)
+                return -1;
+
+        len = sym->end - sym->start;
+
+        if (print_lines) {
+                symbol__get_source_line(sym, map, evidx, &source_line,
+                                        len, filename);
+                print_summary(&source_line, filename);
         }
 
+        symbol__annotate_printf(sym, map, &head, evidx, full_paths,
+                                min_pcnt, max_lines);
         if (print_lines)
                 symbol__free_source_line(sym, len);
 
+        objdump_line_list__purge(&head);
+
         return 0;
 }
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index 6b707324e66f..53dd92de2615 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -67,6 +67,10 @@ int symbol__alloc_hist(struct symbol *sym, int nevents);
 
 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);
+void objdump_line_list__purge(struct list_head *head);
 
 int symbol__tty_annotate(struct symbol *sym, struct map *map, int evidx,
                          bool print_lines, bool full_paths, int min_pcnt,