Add a testcase for function profiling per-cpu statistics interface. There is already func_profile.tc, but that is mainly focusing on the combination of function-profiler and function tracer. This testcase ensures trace_stat per-cpu function statistics is correctly updated.
Signed-off-by: Masami Hiramatsu <mhira...@kernel.org> --- .../ftrace/test.d/ftrace/func_profile_stat.tc | 23 ++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/func_profile_stat.tc diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/func_profile_stat.tc b/tools/testing/selftests/ftrace/test.d/ftrace/func_profile_stat.tc new file mode 100644 index 000000000000..1d2440d80ec3 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/ftrace/func_profile_stat.tc @@ -0,0 +1,23 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: ftrace - function profiling + +[ ! -f function_profile_enabled ] && exit_unsupported + +: "Enable function profile" +echo 1 > function_profile_enabled + +: "Profile must be updated" +cp trace_stat/function0 $TMPDIR/ +( echo "forked"; sleep 1 ) +: "diff returns 0 if there is no difference" +! diff trace_stat/function0 $TMPDIR/function0 + +echo 0 > function_profile_enabled + +: "Profile must NOT be updated" +cp trace_stat/function0 $TMPDIR/ +( echo "forked"; sleep 1 ) +: "diff returns 0 if there is no difference" +diff trace_stat/function0 $TMPDIR/function0 +
