perf tools: Show progress on histogram collapsing

It can take quite amount of time so add progress bar UI to inform user.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1381468543-25334-4-git-send-email-namhyung@kernel.org
[ perf_progress -> ui_progress ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index e3598a456017..98d3891392e2 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -496,6 +496,7 @@ static int __cmd_report(struct perf_report *rep)
         struct map *kernel_map;
         struct kmap *kernel_kmap;
         const char *help = "For a higher level overview, try: perf report --sort comm,dso";
+        struct ui_progress prog;
         struct perf_data_file *file = session->file;
 
         signal(SIGINT, sig_handler);
@@ -558,13 +559,19 @@ static int __cmd_report(struct perf_report *rep)
         }
 
         nr_samples = 0;
+        list_for_each_entry(pos, &session->evlist->entries, node)
+                nr_samples += pos->hists.nr_entries;
+
+        ui_progress__init(&prog, nr_samples, "Merging related events...");
+
+        nr_samples = 0;
         list_for_each_entry(pos, &session->evlist->entries, node) {
                 struct hists *hists = &pos->hists;
 
                 if (pos->idx == 0)
                         hists->symbol_filter_str = rep->symbol_filter_str;
 
-                hists__collapse_resort(hists);
+                hists__collapse_resort(hists, &prog);
                 nr_samples += hists->stats.nr_events[PERF_RECORD_SAMPLE];
 
                 /* Non-group events are considered as leader */
@@ -576,6 +583,7 @@ static int __cmd_report(struct perf_report *rep)
                         hists__link(leader_hists, hists);
                 }
         }
+        ui_progress__finish();
 
         if (session_done())
                 return 0;