tree 81b87743f35b80f30b63a8d5be16c2152934ece1
parent 712a4b6049724278121d56aba683151d86c8c35a
author Arnaldo Carvalho de Melo <acme@redhat.com> 1297960846 -0200
committer Arnaldo Carvalho de Melo <acme@redhat.com> 1297960846 -0200

perf report: Tell the user when a perf.data file has no samples

[root@emilia ~]# perf report --stdio
The perf.data file has no samples!
[root@emilia ~]#

The TUI shows a popup warning message with the same message.

Reported-by: Ingo Molnar <mingo@elte.hu>
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: Steven Rostedt <rostedt@goodmis.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>