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selftests/ftrace: Add trace_pipe testcase

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Add a simple testcase for trace_pipe which can consume
ringbuffer.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
This commit is contained in:
Masami Hiramatsu 2018-08-30 23:23:46 +09:00 committed by Shuah Khan (Samsung OSG)
parent 7bc026d6c0
commit 174fd82339
1 changed files with 16 additions and 0 deletions
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16
tools/testing/selftests/ftrace/test.d/00basic/trace_pipe.tc Normal file
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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: trace_pipe and trace_marker
# flags: instance
[ ! -f trace_marker ] && exit_unsupported
echo "test input 1" > trace_marker
: "trace interface never consume the ring buffer"
grep -q "test input 1" trace
grep -q "test input 1" trace
: "trace interface never consume the ring buffer"
head -n 1 trace_pipe | grep -q "test input 1"
! grep -q "test input 1" trace