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selftests/ftrace: Add function profiling stat testcase

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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>
This commit is contained in:
Masami Hiramatsu 2018-08-30 23:22:21 +09:00 committed by Shuah Khan (Samsung OSG)
parent c21ceceae9
commit 5b56a07b9c
1 changed files with 22 additions and 0 deletions
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tools/testing/selftests/ftrace/test.d/ftrace/func_profile_stat.tc Normal file
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#!/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