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Message-ID: <20250206080952.98478-1-gmonaco@redhat.com> Date: Thu, 6 Feb 2025 09:09:36 +0100 From: Gabriele Monaco <gmonaco@...hat.com> To: linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>, Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>, linux-trace-kernel@...r.kernel.org Cc: Gabriele Monaco <gmonaco@...hat.com>, Juri Lelli <juri.lelli@...hat.com>, John Kacur <jkacur@...hat.com>, Clark Williams <williams@...hat.com> Subject: [RFC PATCH 00/11] rv: Add scheduler specification monitors This patchset starts including adapted scheduler specifications from Daniel's task model [1]. As the model is fairly complicated, it is split in several generators and specifications. The tool used to create the model can output a unified model, but that would be hardly readable (9k states). RV allows monitors to run and react concurrently. Running the cumulative model is equivalent to running single components using the same reactors, with the advantage that it's easier to point out which specification failed in case of error. We allow this by introducing nested monitors, in short, the sysfs monitor folder will contain a monitor named sched, which is nothing but an empty container for other monitors. Controlling the sched monitor (enable, disable, set reactors) controls all nested monitors. The task model proposed by Daniel includes 12 generators and 33 specifications. The generators are good for documentation but are usually implied in some specifications. Not all monitors work out of the box, mainly because of those reasons: * need to distinguish if preempt disable leads to schedule * need to distinguish if irq disable comes from an actual irq * assumptions not always true on SMP The original task model was designed for PREEMPT_RT and this patchset is only tested on an upstream kernel with full preemption enabled. In patch 4-6 are included only some specifications that work without further modifications. Ideally, we would adapt all specifications and add them gradually to the sched monitor. Patch 1 fixes a macro required for some tracepoints This patch was already sent and reviewed in [2] Patch 2 adds some additional tracepoints in the scheduler's code to complete the model, the tracepoints were already defined in Daniel's patches but, as far as I understand, were never submitted Patch 3 adds the empty sched monitor container and the infrastructure for nested monitors Patch 4 adds 2 per-cpu monitors using the tracepoints defined in 2 Patch 5 adds a per-task monitor using the tracepoints defined in 2 Patch 6 adds 3 more per-cpu monitors using the tracepoints defined in 2 and preemptirq tracepoints Patch 7 adjusts the rv tool to support nested monitors Patch 8 adjusts the dot2k tool to support nested monitors Patch 9 adds some documentation for the sched monitors, including a description of the included specifications Patch 10 adapts the rv tool to list also filtering by container [1] - https://bristot.me/linux-task-model [2] - https://lore.kernel.org/linux-trace-kernel/20250128111926.303093-1-gmonaco@redhat.com To: Steven Rostedt <rostedt@...dmis.org> To: Ingo Molnar <mingo@...hat.com> To: Peter Zijlstra <peterz@...radead.org> Cc: Juri Lelli <juri.lelli@...hat.com> Cc: John Kacur <jkacur@...hat.com> Cc: Clark Williams <williams@...hat.com> To: linux-trace-kernel@...r.kernel.org Gabriele Monaco (11): tracing: Fix DECLARE_TRACE_CONDITION rv: Add license identifiers to monitor files sched: Add sched tracepoints for RV task model rv: Add option for nested monitors and include sched rv: Add sco and tss per-cpu monitors rv: Add snroc per-task monitor rv: Add scpd, snep and sncid per-cpu monitors tools/rv: Add support for nested monitors verification/dot2k: Add support for nested monitors Documentation/rv: Add docs for the sched monitors tools/rv: Allow rv list to filter for container Documentation/tools/rv/rv-mon-sched.rst | 69 +++++ Documentation/trace/rv/monitor_sched.rst | 171 ++++++++++++ include/linux/rv.h | 4 +- include/linux/sched.h | 7 + include/trace/define_trace.h | 7 + include/trace/events/sched.h | 17 ++ kernel/sched/core.c | 21 +- kernel/trace/rv/Kconfig | 7 + kernel/trace/rv/Makefile | 7 + kernel/trace/rv/monitors/sched/Kconfig | 18 ++ kernel/trace/rv/monitors/sched/sched.c | 38 +++ kernel/trace/rv/monitors/sched/sched.h | 3 + kernel/trace/rv/monitors/sco/Kconfig | 13 + kernel/trace/rv/monitors/sco/sco.c | 88 ++++++ kernel/trace/rv/monitors/sco/sco.h | 47 ++++ kernel/trace/rv/monitors/sco/sco_trace.h | 15 + kernel/trace/rv/monitors/scpd/Kconfig | 14 + kernel/trace/rv/monitors/scpd/scpd.c | 96 +++++++ kernel/trace/rv/monitors/scpd/scpd.h | 49 ++++ kernel/trace/rv/monitors/scpd/scpd_trace.h | 15 + kernel/trace/rv/monitors/sncid/Kconfig | 14 + kernel/trace/rv/monitors/sncid/sncid.c | 96 +++++++ kernel/trace/rv/monitors/sncid/sncid.h | 49 ++++ kernel/trace/rv/monitors/sncid/sncid_trace.h | 15 + kernel/trace/rv/monitors/snep/Kconfig | 14 + kernel/trace/rv/monitors/snep/snep.c | 96 +++++++ kernel/trace/rv/monitors/snep/snep.h | 49 ++++ kernel/trace/rv/monitors/snep/snep_trace.h | 15 + kernel/trace/rv/monitors/snroc/Kconfig | 13 + kernel/trace/rv/monitors/snroc/snroc.c | 87 ++++++ kernel/trace/rv/monitors/snroc/snroc.h | 47 ++++ kernel/trace/rv/monitors/snroc/snroc_trace.h | 15 + kernel/trace/rv/monitors/tss/Kconfig | 13 + kernel/trace/rv/monitors/tss/tss.c | 91 +++++++ kernel/trace/rv/monitors/tss/tss.h | 47 ++++ kernel/trace/rv/monitors/tss/tss_trace.h | 15 + kernel/trace/rv/monitors/wip/Kconfig | 2 + kernel/trace/rv/monitors/wip/wip.c | 2 +- kernel/trace/rv/monitors/wip/wip.h | 1 + kernel/trace/rv/monitors/wwnr/Kconfig | 2 + kernel/trace/rv/monitors/wwnr/wwnr.c | 2 +- kernel/trace/rv/monitors/wwnr/wwnr.h | 1 + kernel/trace/rv/rv.c | 151 +++++++++-- kernel/trace/rv/rv.h | 4 + kernel/trace/rv/rv_reactors.c | 28 +- kernel/trace/rv/rv_trace.h | 6 + tools/verification/dot2/dot2k | 27 +- tools/verification/dot2/dot2k.py | 79 ++++-- .../verification/dot2/dot2k_templates/Kconfig | 3 + .../verification/dot2/dot2k_templates/main.c | 4 +- .../dot2/dot2k_templates/main_container.c | 38 +++ .../dot2/dot2k_templates/main_container.h | 3 + tools/verification/models/sched/sco.dot | 18 ++ tools/verification/models/sched/scpd.dot | 18 ++ tools/verification/models/sched/sncid.dot | 18 ++ tools/verification/models/sched/snep.dot | 18 ++ tools/verification/models/sched/snroc.dot | 18 ++ tools/verification/models/sched/tss.dot | 18 ++ tools/verification/rv/include/in_kernel.h | 2 +- tools/verification/rv/include/rv.h | 3 +- tools/verification/rv/src/in_kernel.c | 256 ++++++++++++++---- tools/verification/rv/src/rv.c | 38 ++- 62 files changed, 2015 insertions(+), 127 deletions(-) create mode 100644 Documentation/tools/rv/rv-mon-sched.rst create mode 100644 Documentation/trace/rv/monitor_sched.rst create mode 100644 kernel/trace/rv/monitors/sched/Kconfig create mode 100644 kernel/trace/rv/monitors/sched/sched.c create mode 100644 kernel/trace/rv/monitors/sched/sched.h create mode 100644 kernel/trace/rv/monitors/sco/Kconfig create mode 100644 kernel/trace/rv/monitors/sco/sco.c create mode 100644 kernel/trace/rv/monitors/sco/sco.h create mode 100644 kernel/trace/rv/monitors/sco/sco_trace.h create mode 100644 kernel/trace/rv/monitors/scpd/Kconfig create mode 100644 kernel/trace/rv/monitors/scpd/scpd.c create mode 100644 kernel/trace/rv/monitors/scpd/scpd.h create mode 100644 kernel/trace/rv/monitors/scpd/scpd_trace.h create mode 100644 kernel/trace/rv/monitors/sncid/Kconfig create mode 100644 kernel/trace/rv/monitors/sncid/sncid.c create mode 100644 kernel/trace/rv/monitors/sncid/sncid.h create mode 100644 kernel/trace/rv/monitors/sncid/sncid_trace.h create mode 100644 kernel/trace/rv/monitors/snep/Kconfig create mode 100644 kernel/trace/rv/monitors/snep/snep.c create mode 100644 kernel/trace/rv/monitors/snep/snep.h create mode 100644 kernel/trace/rv/monitors/snep/snep_trace.h create mode 100644 kernel/trace/rv/monitors/snroc/Kconfig create mode 100644 kernel/trace/rv/monitors/snroc/snroc.c create mode 100644 kernel/trace/rv/monitors/snroc/snroc.h create mode 100644 kernel/trace/rv/monitors/snroc/snroc_trace.h create mode 100644 kernel/trace/rv/monitors/tss/Kconfig create mode 100644 kernel/trace/rv/monitors/tss/tss.c create mode 100644 kernel/trace/rv/monitors/tss/tss.h create mode 100644 kernel/trace/rv/monitors/tss/tss_trace.h create mode 100644 tools/verification/dot2/dot2k_templates/main_container.c create mode 100644 tools/verification/dot2/dot2k_templates/main_container.h create mode 100644 tools/verification/models/sched/sco.dot create mode 100644 tools/verification/models/sched/scpd.dot create mode 100644 tools/verification/models/sched/sncid.dot create mode 100644 tools/verification/models/sched/snep.dot create mode 100644 tools/verification/models/sched/snroc.dot create mode 100644 tools/verification/models/sched/tss.dot base-commit: 5c8c229261f14159b54b9a32f12e5fa89d88b905 -- 2.48.1
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