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Per task wakeup while not running (wwnr) monitor. This model is broken, the reason is that a task can be running in the processor without being set as RUNNABLE. Think about a task about to sleep: 1: set_current_state(TASK_UNINTERRUPTIBLE); 2: schedule(); And then imagine an IRQ happening in between the lines one and two, waking the task up. BOOM, the wakeup will happen while the task is running. Q: Why do we need this model, so? A: To test the reactors. Link: https://lkml.kernel.org/r/473c0fc39967250fdebcff8b620311c11dccad30.1659052063.git.bristot@kernel.org Cc: Wim Van Sebroeck <wim@linux-watchdog.org> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Marco Elver <elver@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: "Paul E. McKenney" <paulmck@kernel.org> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: Gabriele Paoloni <gpaoloni@redhat.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Clark Williams <williams@redhat.com> Cc: Tao Zhou <tao.zhou@linux.dev> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-trace-devel@vger.kernel.org Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
62 lines
1.8 KiB
Text
62 lines
1.8 KiB
Text
# SPDX-License-Identifier: GPL-2.0-only
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#
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config DA_MON_EVENTS
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bool
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config DA_MON_EVENTS_IMPLICIT
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select DA_MON_EVENTS
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bool
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config DA_MON_EVENTS_ID
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select DA_MON_EVENTS
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bool
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menuconfig RV
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bool "Runtime Verification"
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depends on TRACING
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help
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Enable the kernel runtime verification infrastructure. RV is a
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lightweight (yet rigorous) method that complements classical
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exhaustive verification techniques (such as model checking and
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theorem proving). RV works by analyzing the trace of the system's
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actual execution, comparing it against a formal specification of
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the system behavior.
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For further information, see:
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Documentation/trace/rv/runtime-verification.rst
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config RV_MON_WIP
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depends on RV
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depends on PREEMPT_TRACER
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select DA_MON_EVENTS_IMPLICIT
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bool "wip monitor"
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help
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Enable wip (wakeup in preemptive) sample monitor that illustrates
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the usage of per-cpu monitors, and one limitation of the
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preempt_disable/enable events.
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For further information, see:
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Documentation/trace/rv/monitor_wip.rst
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config RV_MON_WWNR
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depends on RV
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select DA_MON_EVENTS_ID
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bool "wwnr monitor"
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help
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Enable wwnr (wakeup while not running) sample monitor, this is a
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sample monitor that illustrates the usage of per-task monitor.
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The model is borken on purpose: it serves to test reactors.
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For further information, see:
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Documentation/trace/rv/monitor_wwnr.rst
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config RV_REACTORS
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bool "Runtime verification reactors"
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default y
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depends on RV
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help
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Enables the online runtime verification reactors. A runtime
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monitor can cause a reaction to the detection of an exception
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on the model's execution. By default, the monitors have
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tracing reactions, printing the monitor output via tracepoints,
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but other reactions can be added (on-demand) via this interface.
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