linux.git/kernel/trace/rv/monitors, branch v6.16

rv: Add scpd, snep and sncid per-cpu monitors

2025-03-24T21:27:39+00:00

Add 3 per-cpu monitors as part of the sched model:

* scpd: schedule called with preemption disabled
    Monitor to ensure schedule is called with preemption disabled
* snep: schedule does not enable preempt
    Monitor to ensure schedule does not enable preempt
* sncid: schedule not called with interrupt disabled
    Monitor to ensure schedule is not called with interrupt disabled

To: Ingo Molnar 
To: Peter Zijlstra 
Cc: Juri Lelli 
Cc: Ingo Molnar 
Cc: Peter Zijlstra 
Cc: John Kacur 
Cc: Clark Williams 
Link: https://lore.kernel.org/20250305140406.350227-6-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco 
Signed-off-by: Steven Rostedt (Google)

rv: Add snroc per-task monitor

2025-03-24T21:27:39+00:00

Add a per-task monitor as part of the sched model:

* snroc: set non runnable on its own context
    Monitor to ensure set_state happens only in the respective task's context

To: Ingo Molnar 
To: Peter Zijlstra 
Cc: Juri Lelli 
Cc: Ingo Molnar 
Cc: Peter Zijlstra 
Cc: John Kacur 
Cc: Clark Williams 
Link: https://lore.kernel.org/20250305140406.350227-5-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco 
Signed-off-by: Steven Rostedt (Google)

rv: Add sco and tss per-cpu monitors

2025-03-24T21:27:39+00:00

Add 2 per-cpu monitors as part of the sched model:

* sco: scheduling context operations
    Monitor to ensure sched_set_state happens only in thread context
* tss: task switch while scheduling
    Monitor to ensure sched_switch happens only in scheduling context

To: Ingo Molnar 
To: Peter Zijlstra 
Cc: Juri Lelli 
Cc: Ingo Molnar 
Cc: Peter Zijlstra 
Cc: John Kacur 
Cc: Clark Williams 
Link: https://lore.kernel.org/20250305140406.350227-4-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco 
Signed-off-by: Steven Rostedt (Google)

rv: Add option for nested monitors and include sched

2025-03-24T21:27:39+00:00

Monitors describing complex systems, such as the scheduler, can easily
grow to the point where they are just hard to understand because of the
many possible state transitions.
Often it is possible to break such descriptions into smaller monitors,
sharing some or all events. Enabling those smaller monitors concurrently
is, in fact, testing the system as if we had one single larger monitor.
Splitting models into multiple specification is not only easier to
understand, but gives some more clues when we see errors.

Add the possibility to create container monitors, whose only purpose is
to host other nested monitors. Enabling a container monitor enables all
nested ones, but it's still possible to enable nested monitors
independently.
Add the sched monitor as first container, for now empty.

Cc: Ingo Molnar 
Cc: Peter Zijlstra 
Cc: Juri Lelli 
Link: https://lore.kernel.org/20250305140406.350227-3-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco 
Signed-off-by: Steven Rostedt (Google)

rv: Add license identifiers to monitor files

2025-03-04T17:11:08+00:00

Some monitor files like the main header and the Kconfig are missing the
license identifier.

Add it to those and make sure the automatic generation script includes
the line in newly created monitors.

Cc: Masami Hiramatsu 
Cc: Ingo Molnar 
Cc: Peter Zijlstra 
Cc: Juri Lelli 
Link: https://lore.kernel.org/20250218123121.253551-3-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco 
Signed-off-by: Steven Rostedt (Google)

rv: Simplify manual steps in monitor creation

2024-12-27T19:20:03+00:00

While creating a new monitor in RV, besides generating code from dot2k,
there are a few manual steps which can be tedious and error prone, like
adding the tracepoints, makefile lines and kconfig.

This patch restructures the existing monitors to keep some files in the
monitor's folder itself, which can be automatically generated by future
versions of dot2k.

Monitors have now their own Kconfig and tracepoint snippets. For
simplicity, the main tracepoint definition, is moved to the RV
directory, it defines only the tracepoint classes and includes the
monitor-specific tracepoints, which reside in the monitor directory.

Tracepoints and Kconfig no longer need to be copied and adapted from
existing ones but only need to be included in the main files.
The Makefile remains untouched since there's little advantage in having
a separated Makefile for each monitor with a single line and including
it in the main RV Makefile.

Cc: Juri Lelli 
Cc: Thomas Gleixner 
Cc: John Kacur 
Link: https://lore.kernel.org/20241227144752.362911-6-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco 
Signed-off-by: Steven Rostedt (Google)

rv/monitors: Move monitor structure in rodata

2022-12-20T16:46:40+00:00

It makes sense to move the important monitor structure into rodata to
prevent accidental structure modification.

Link: https://lkml.kernel.org/r/20221122173648.4732-1-acarmina@redhat.com

Signed-off-by: Alessandro Carminati 
Acked-by: Daniel Bristot de Oliveira 
Signed-off-by: Steven Rostedt (Google)

rv/monitor: Add init/exit annotations to module init/exit funcs

2022-09-26T22:10:51+00:00

Add missing __init/__exit annotations to module init/exit funcs.

Link: https://lkml.kernel.org/r/20220922103208.162869-1-xiujianfeng@huawei.com

Fixes: 24bce201d798 ("tools/rv: Add dot2k")
Fixes: 8812d21219b9 ("rv/monitor: Add the wip monitor skeleton created by dot2k")
Fixes: ccc319dcb450 ("rv/monitor: Add the wwnr monitor")
Signed-off-by: Xiu Jianfeng 
Acked-by: Daniel Bristot de Oliveira 
Signed-off-by: Steven Rostedt (Google)

rv/monitors: add 'static' qualifier for local symbols

2022-09-26T17:01:09+00:00

The sparse tool complains as follows:

kernel/trace/rv/monitors/wwnr/wwnr.c:18:19:
warning: symbol 'rv_wwnr' was not declared. Should it be static?

The `rv_wwnr` symbol is not dereferenced by other extern files,
so add static qualifier for it.

So does wip module.

Link: https://lkml.kernel.org/r/20220824034357.2014202-2-zengheng4@huawei.com

Cc: 
Fixes:	ccc319dcb450 ("rv/monitor: Add the wwnr monitor")
Fixes:	8812d21219b9 ("rv/monitor: Add the wip monitor skeleton created by dot2k")
Signed-off-by: Zeng Heng 
Acked-by: Daniel Bristot de Oliveira 
Signed-off-by: Steven Rostedt (Google)

rv/monitors: Make monitor's automata definition static

2022-09-07T02:13:25+00:00

Monitor's automata definition is only used locally, so make
them static for all existing monitors.

Link: https://lore.kernel.org/all/202208210332.gtHXje45-lkp@intel.com
Link: https://lore.kernel.org/all/202208210358.6HH3OrVs-lkp@intel.com
Link: https://lkml.kernel.org/r/a50e27c3738d6ef809f4201857229fed64799234.1661266564.git.bristot@kernel.org

Fixes: ccc319dcb450 ("rv/monitor: Add the wwnr monitor")
Fixes: 8812d21219b9 ("rv/monitor: Add the wip monitor skeleton created by dot2k")
Reported-by: kernel test robot 
Signed-off-by: Daniel Bristot de Oliveira 
Signed-off-by: Steven Rostedt (Google)

linux.git/kernel/trace/rv/monitors, branch v6.16

rv: Add scpd, snep and sncid per-cpu monitors

rv: Add snroc per-task monitor

rv: Add sco and tss per-cpu monitors

rv: Add option for nested monitors and include sched

rv: Add license identifiers to monitor files

rv: Simplify manual steps in monitor creation

rv/monitors: Move monitor structure in rodata

rv/monitor: Add __init/__exit annotations to module init/exit funcs

rv/monitors: add 'static' qualifier for local symbols

rv/monitors: Make monitor's automata definition static

rv/monitor: Add init/exit annotations to module init/exit funcs