On 06/28/2017 08:17 AM, Steven Rostedt wrote: > On Tue, 27 Jun 2017 19:28:32 +0900 > Masami Hiramatsu <mhira...@kernel.org> wrote: > >> Use md5sum so that it takes less time of checking >> trace logs update. Since busybox tail/cat takes too >> long time to read the trace log, this uses md5sum >> to check whether trace log is updated or not. > > How much faster is md5sum? I can see this causing issues in other > environments. > > -- Steve
Sorry Steve. I pulled this into linux-ksefltest next. Are you concerned about any specific environments? I can try this out and see if it is a problem. thanks, -- Shuah > >> >> Signed-off-by: Masami Hiramatsu <mhira...@kernel.org> >> --- >> .../test.d/ftrace/func_traceonoff_triggers.tc | 6 +++--- >> 1 file changed, 3 insertions(+), 3 deletions(-) >> >> diff --git >> a/tools/testing/selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc >> b/tools/testing/selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc >> index 9cf3852..7a9ab4f 100644 >> --- >> a/tools/testing/selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc >> +++ >> b/tools/testing/selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc >> @@ -103,11 +103,11 @@ if [ $on != "0" ]; then >> fail "Tracing is not off" >> fi >> >> -line1=`cat trace | tail -1` >> +csum1=`md5sum trace` >> sleep $SLEEP_TIME >> -line2=`cat trace | tail -1` >> +csum2=`md5sum trace` >> >> -if [ "$line1" != "$line2" ]; then >> +if [ "$csum1" != "$csum2" ]; then >> fail "Tracing file is still changing" >> fi >> > > >
