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    Subject[PATCH v2 28/32] selftests/ftrace: Add wakeup tracer testcase
    Date
    Add a testcase for wakeup tracer.

    Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
    ---
    tools/testing/selftests/ftrace/config | 1 +
    .../selftests/ftrace/test.d/tracer/wakeup.tc | 25 ++++++++++++++++++++
    2 files changed, 26 insertions(+)
    create mode 100644 tools/testing/selftests/ftrace/test.d/tracer/wakeup.tc

    diff --git a/tools/testing/selftests/ftrace/config b/tools/testing/selftests/ftrace/config
    index b7ac74fcb0fa..c2c8de4fafff 100644
    --- a/tools/testing/selftests/ftrace/config
    +++ b/tools/testing/selftests/ftrace/config
    @@ -4,6 +4,7 @@ CONFIG_FUNCTION_PROFILER=y
    CONFIG_TRACER_SNAPSHOT=y
    CONFIG_STACK_TRACER=y
    CONFIG_HIST_TRIGGERS=y
    +CONFIG_SCHED_TRACER=y
    CONFIG_PREEMPT_TRACER=y
    CONFIG_IRQSOFF_TRACER=y
    CONFIG_PREEMPTIRQ_DELAY_TEST=m
    diff --git a/tools/testing/selftests/ftrace/test.d/tracer/wakeup.tc b/tools/testing/selftests/ftrace/test.d/tracer/wakeup.tc
    new file mode 100644
    index 000000000000..e3005fa785f0
    --- /dev/null
    +++ b/tools/testing/selftests/ftrace/test.d/tracer/wakeup.tc
    @@ -0,0 +1,25 @@
    +#!/bin/sh
    +# SPDX-License-Identifier: GPL2.0
    +# description: Test wakeup tracer
    +
    +if ! which chrt ; then
    + echo "chrt is not found. This test requires nice command."
    + exit_unresolved
    +fi
    +
    +if ! grep -wq "wakeup" available_tracers ; then
    + echo "wakeup tracer is not supported"
    + exit_unsupported
    +fi
    +
    +echo wakeup > current_tracer
    +echo 1 > tracing_on
    +echo 0 > tracing_max_latency
    +
    +: "Wakeup higher priority task"
    +chrt -f 5 sleep 1
    +
    +echo 0 > tracing_on
    +grep '+ \[[[:digit:]]*\]' trace
    +grep '==> \[[[:digit:]]*\]' trace
    +
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