selftests/ftrace: Add function profiling stat testcase (5b56a07b) · Commits · 戴 / test

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 <mhiramat@kernel.org> Acked-by:

Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by:

Shuah Khan (Samsung OSG) <shuah@kernel.org>

tools/testing/selftests/ftrace/test.d/ftrace/func_profile_stat.tc

0 → 100644

+22 −0

Original line number	Diff line number	Diff line
		#!/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

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