From: Nam Cao <namcao@linutronix.de>
To: Gabriele Monaco <gmonaco@redhat.com>,
linux-kernel@vger.kernel.org, Jonathan Corbet <corbet@lwn.net>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
linux-doc@vger.kernel.org, linux-trace-kernel@vger.kernel.org
Cc: Gabriele Monaco <gmonaco@redhat.com>,
Tomas Glozar <tglozar@redhat.com>, Juri Lelli <jlelli@redhat.com>,
Clark Williams <williams@redhat.com>,
John Kacur <jkacur@redhat.com>
Subject: Re: [PATCH v2 14/20] rv: Add sample hybrid monitors stall
Date: Fri, 10 Oct 2025 16:23:42 +0200 [thread overview]
Message-ID: <87frbqygwh.fsf@yellow.woof> (raw)
In-Reply-To: <20250919140954.104920-15-gmonaco@redhat.com>
Gabriele Monaco <gmonaco@redhat.com> writes:
> +- Name: stall - wakeup in preemptive
^^^^^^^^^^^^^^^^^^^^
copy-paste mistake?
> +- Type: per-task hybrid automaton
> +- Author: Gabriele Monaco <gmonaco@redhat.com>
> +
> +Description
> +-----------
> +
> +The stalled task (stall) monitor is a sample per-task timed monitor that checks
> +if tasks are scheduled within a defined threshold after they are ready::
> +
> + |
> + |
> + v
> + #==================================#
> + H dequeued H <+
> + #==================================# |
> + | |
> + | sched_wakeup;reset(clk) |
> + v |
> + +----------------------------------+ |
> + | enqueued | |
> + | clk < threshold_jiffies | | sched_switch_wait
> + +----------------------------------+ |
> + | |
> + | sched_switch_in |
> + sched_switch_in v |
> + sched_wakeup +----------------------------------+ |
> + +------------------ | | |
> + | | running | |
> + +-----------------> | | -+
> + +----------------------------------+
I think this monitor does not detect if a task get preempted, but then
never get scheduled again?
This sample monitor does not have to cover everything obviously, but I'm
curious if I understand it correct.
Nam
next prev parent reply other threads:[~2025-10-10 14:23 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-19 14:09 [PATCH v2 00/20] rv: Add Hybrid Automata monitor type, per-object and deadline monitors Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 01/20] rv: Refactor da_monitor to minimise macros Gabriele Monaco
2025-10-02 8:45 ` Nam Cao
2025-09-19 14:09 ` [PATCH v2 02/20] rv: Cleanup da_monitor after refactor Gabriele Monaco
2025-10-02 8:49 ` Nam Cao
2025-09-19 14:09 ` [PATCH v2 03/20] rv: Unify DA event handling functions across monitor types Gabriele Monaco
2025-10-02 9:14 ` Nam Cao
2025-10-02 11:30 ` Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 04/20] Documentation/rv: Adapt documentation after da_monitor refactoring Gabriele Monaco
2025-10-02 9:26 ` Nam Cao
2025-09-19 14:09 ` [PATCH v2 05/20] verification/rvgen: Adapt dot2k and templates after refactoring da_monitor.h Gabriele Monaco
2025-10-02 9:34 ` Nam Cao
2025-09-19 14:09 ` [PATCH v2 06/20] verification/rvgen: Annotate DA functions with types Gabriele Monaco
2025-10-02 9:39 ` Nam Cao
2025-09-19 14:09 ` [PATCH v2 07/20] verification/dot2c: Remove __buff_to_string() and cleanup Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 08/20] verification/dot2c: Remove superfluous enum assignment and add last comma Gabriele Monaco
2025-10-02 9:40 ` Nam Cao
2025-09-19 14:09 ` [PATCH v2 09/20] verification/rvgen: Remove unused variable declaration from containers Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 10/20] rv: Add Hybrid Automata monitor type Gabriele Monaco
2025-10-17 8:44 ` Nam Cao
2025-10-17 9:48 ` Gabriele Monaco
2025-10-17 13:05 ` Nam Cao
2025-10-17 15:22 ` Gabriele Monaco
2025-10-20 13:43 ` Nam Cao
2025-09-19 14:09 ` [PATCH v2 11/20] verification/rvgen: Allow spaces in and events strings Gabriele Monaco
2025-10-02 11:03 ` Nam Cao
2025-10-02 11:17 ` Gabriele Monaco
2025-10-06 13:20 ` Nam Cao
2025-10-06 15:22 ` Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 12/20] verification/rvgen: Add support for Hybrid Automata Gabriele Monaco
2025-10-17 9:37 ` Nam Cao
2025-10-17 9:53 ` Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 13/20] Documentation/rv: Add documentation about hybrid automata Gabriele Monaco
2025-10-10 13:46 ` Nam Cao
2025-10-13 8:33 ` Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 14/20] rv: Add sample hybrid monitors stall Gabriele Monaco
2025-10-10 14:23 ` Nam Cao [this message]
2025-10-13 9:01 ` Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 15/20] rv: Convert the opid monitor to a hybrid automaton Gabriele Monaco
2025-10-10 14:29 ` Nam Cao
2025-10-13 14:14 ` Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 16/20] sched: Export hidden tracepoints to modules Gabriele Monaco
2025-09-19 15:37 ` Steven Rostedt
2025-09-19 17:07 ` Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 17/20] sched: Add deadline tracepoints Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 18/20] rv: Add support for per-object monitors in DA/HA Gabriele Monaco
2025-10-21 11:55 ` Nam Cao
2025-10-21 15:54 ` Gabriele Monaco
2025-10-23 12:36 ` Nam Cao
2025-10-24 9:20 ` Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 19/20] verification/rvgen: Add support for per-obj monitors Gabriele Monaco
2025-10-21 12:00 ` Nam Cao
2025-09-19 14:09 ` [PATCH v2 20/20] rv: Add deadline monitors Gabriele Monaco
2025-10-10 15:04 ` Nam Cao
2025-10-13 7:30 ` Gabriele Monaco
2025-10-21 12:05 ` [PATCH v2 00/20] rv: Add Hybrid Automata monitor type, per-object and " Nam Cao
2025-10-21 15:45 ` Gabriele Monaco
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