perf report: Add progress bar when processing time ordered events

So that for large perf.data files the user can have visual feedback that
activity is being performed.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-3ysn01mpspfrbsy56gznzqqz@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 10 insertions, 0 deletions

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index da354fe5e085..85c1e6b76f0a 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -502,6 +502,7 @@ static void flush_sample_queue(struct perf_session *s,
         struct perf_sample sample;
         u64 limit = os->next_flush;
         u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL;
+        unsigned idx = 0, progress_next = os->nr_samples / 16;
         int ret;
 
         if (!ops->ordered_samples || !limit)
@@ -521,6 +522,11 @@ static void flush_sample_queue(struct perf_session *s,
                 os->last_flush = iter->timestamp;
                 list_del(&iter->list);
                 list_add(&iter->list, &os->sample_cache);
+                if (++idx >= progress_next) {
+                        progress_next += os->nr_samples / 16;
+                        ui_progress__update(idx, os->nr_samples,
+                                            "Processing time ordered events...");
+                }
         }
 
         if (list_empty(head)) {
@@ -529,6 +535,8 @@ static void flush_sample_queue(struct perf_session *s,
                 os->last_sample =
                         list_entry(head->prev, struct sample_queue, list);
         }
+
+        os->nr_samples = 0;
 }
 
 /*
@@ -588,6 +596,7 @@ static void __queue_event(struct sample_queue *new, struct perf_session *s)
         u64 timestamp = new->timestamp;
         struct list_head *p;
 
+        ++os->nr_samples;
         os->last_sample = new;
 
         if (!sample) {
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 514b06d41f05..6e393c98eb34 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -23,6 +23,7 @@ struct ordered_samples {
         struct sample_queue     *sample_buffer;
         struct sample_queue     *last_sample;
         int                     sample_buffer_idx;
+        unsigned int            nr_samples;
 };
 
 struct perf_session {