perf top tui: Wait till the first sample to refresh the screen.

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>

1 files changed, 1 insertions, 0 deletions

diff --git a/tools/perf/util/top.h b/tools/perf/util/top.h
index e8d28e2ecdba..96d1cb78af01 100644
--- a/tools/perf/util/top.h
+++ b/tools/perf/util/top.h
@@ -35,6 +35,7 @@ struct perf_top {
          */
         struct list_head   active_symbols;
         pthread_mutex_t    active_symbols_lock;
+        pthread_cond_t     active_symbols_cond;
         u64                samples;
         u64                kernel_samples, us_samples;
         u64                exact_samples;