From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> [ Upstream commit 4fe94ce1c6ba678b5f12b94bb9996eea4fc99e85 ] To get the expected output we have to ignore whatever changes the user has in its ~/.perfconfig file, so set PERF_CONFIG to /dev/null to achieve that. Before: # egrep 'trace|show_' ~/.perfconfig [trace] show_zeros = yes show_duration = no show_timestamp = no show_arg_names = no show_prefix = yes # echo $PERF_CONFIG # perf test "trace + vfs_getname" 70: Check open filename arg using perf trace + vfs_getname: FAILED! # export PERF_CONFIG=/dev/null # perf test "trace + vfs_getname" 70: Check open filename arg using perf trace + vfs_getname: Ok # After: # egrep 'trace|show_' ~/.perfconfig [trace] show_zeros = yes show_duration = no show_timestamp = no show_arg_names = no show_prefix = yes # echo $PERF_CONFIG # perf test "trace + vfs_getname" 70: Check open filename arg using perf trace + vfs_getname: Ok # Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx> Cc: Jiri Olsa <jolsa@xxxxxxxxxx> Cc: Luis Cláudio Gonçalves <lclaudio@xxxxxxxxxx> Cc: Namhyung Kim <namhyung@xxxxxxxxxx> Cc: Taeung Song <treeze.taeung@xxxxxxxxx> Link: https://lkml.kernel.org/n/tip-3up27pexg5i3exuzqrvt4m8u@xxxxxxxxxxxxxx Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- tools/perf/tests/shell/trace+probe_vfs_getname.sh | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/perf/tests/shell/trace+probe_vfs_getname.sh b/tools/perf/tests/shell/trace+probe_vfs_getname.sh index 4ce276efe6b4c..fe223fc5c1f85 100755 --- a/tools/perf/tests/shell/trace+probe_vfs_getname.sh +++ b/tools/perf/tests/shell/trace+probe_vfs_getname.sh @@ -29,6 +29,10 @@ if [ $err -ne 0 ] ; then exit $err fi +# Do not use whatever ~/.perfconfig file, it may change the output +# via trace.{show_timestamp,show_prefix,etc} +export PERF_CONFIG=/dev/null + trace_open_vfs_getname err=$? rm -f ${file} -- 2.20.1
