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Message-Id: <6559fb9064f683fda469849549c72607c0f2ae5b.1655368610.git.bristot@kernel.org>
Date: Thu, 16 Jun 2022 10:44:50 +0200
From: Daniel Bristot de Oliveira <bristot@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Daniel Bristot de Oliveira <bristot@...nel.org>,
Wim Van Sebroeck <wim@...ux-watchdog.org>,
Guenter Roeck <linux@...ck-us.net>,
Jonathan Corbet <corbet@....net>,
Ingo Molnar <mingo@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>,
Peter Zijlstra <peterz@...radead.org>,
Will Deacon <will@...nel.org>,
Catalin Marinas <catalin.marinas@....com>,
Marco Elver <elver@...gle.com>,
Dmitry Vyukov <dvyukov@...gle.com>,
"Paul E. McKenney" <paulmck@...nel.org>,
Shuah Khan <skhan@...uxfoundation.org>,
Gabriele Paoloni <gpaoloni@...hat.com>,
Juri Lelli <juri.lelli@...hat.com>,
Clark Williams <williams@...hat.com>,
linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-trace-devel@...r.kernel.org
Subject: [PATCH V4 08/20] rv/monitor: Add the wip monitor skeleton created by dot2k
This is the direct output this command line:
$ dot2k -d ~/wip.dot -t per_cpu
with wip.dot as:
----- %< -----
digraph state_automaton {
center = true;
size = "7,11";
rankdir = LR;
{node [shape = circle] "non_preemptive"};
{node [shape = plaintext, style=invis, label=""] "__init_preemptive"};
{node [shape = doublecircle] "preemptive"};
{node [shape = circle] "preemptive"};
"__init_preemptive" -> "preemptive";
"non_preemptive" [label = "non_preemptive"];
"non_preemptive" -> "non_preemptive" [ label = "sched_waking" ];
"non_preemptive" -> "preemptive" [ label = "preempt_enable" ];
"preemptive" [label = "preemptive"];
"preemptive" -> "non_preemptive" [ label = "preempt_disable" ];
{ rank = min ;
"__init_preemptive";
"preemptive";
}
}
----- >% -----
This model is broken because preempt_disable_notrace(). It is broken on
purpose to test the reactors.
It does not compile because it lacks the instrumentation, which will be
add next.
Cc: Wim Van Sebroeck <wim@...ux-watchdog.org>
Cc: Guenter Roeck <linux@...ck-us.net>
Cc: Jonathan Corbet <corbet@....net>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Will Deacon <will@...nel.org>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Marco Elver <elver@...gle.com>
Cc: Dmitry Vyukov <dvyukov@...gle.com>
Cc: "Paul E. McKenney" <paulmck@...nel.org>
Cc: Shuah Khan <skhan@...uxfoundation.org>
Cc: Gabriele Paoloni <gpaoloni@...hat.com>
Cc: Juri Lelli <juri.lelli@...hat.com>
Cc: Clark Williams <williams@...hat.com>
Cc: linux-doc@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: linux-trace-devel@...r.kernel.org
Signed-off-by: Daniel Bristot de Oliveira <bristot@...nel.org>
---
kernel/trace/rv/monitors/wip/wip.c | 112 +++++++++++++++++++++++++++++
kernel/trace/rv/monitors/wip/wip.h | 38 ++++++++++
2 files changed, 150 insertions(+)
create mode 100644 kernel/trace/rv/monitors/wip/wip.c
create mode 100644 kernel/trace/rv/monitors/wip/wip.h
diff --git a/kernel/trace/rv/monitors/wip/wip.c b/kernel/trace/rv/monitors/wip/wip.c
new file mode 100644
index 000000000000..08950e09b823
--- /dev/null
+++ b/kernel/trace/rv/monitors/wip/wip.c
@@ -0,0 +1,112 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/ftrace.h>
+#include <linux/tracepoint.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/rv.h>
+#include <rv/instrumentation.h>
+#include <rv/da_monitor.h>
+
+#define MODULE_NAME "wip"
+
+/*
+ * XXX: include required tracepoint headers, e.g.,
+ * #include <linux/trace/events/sched.h>
+ */
+#include <trace/events/rv.h>
+
+/*
+ * This is the self-generated part of the monitor. Generally, there is no need
+ * to touch this section.
+ */
+#include "wip.h"
+
+/*
+ * Declare the deterministic automata monitor.
+ *
+ * The rv monitor reference is needed for the monitor declaration.
+ */
+struct rv_monitor rv_wip;
+DECLARE_DA_MON_PER_CPU(wip, char);
+
+/*
+ * This is the instrumentation part of the monitor.
+ *
+ * This is the section where manual work is required. Here the kernel events
+ * are translated into model's event.
+ *
+ */
+static void handle_preempt_disable(void *data, /* XXX: fill header */)
+{
+ da_handle_event_wip(preempt_disable_wip);
+}
+
+static void handle_preempt_enable(void *data, /* XXX: fill header */)
+{
+ da_handle_event_wip(preempt_enable_wip);
+}
+
+static void handle_sched_waking(void *data, /* XXX: fill header */)
+{
+ da_handle_event_wip(sched_waking_wip);
+}
+
+static int start_wip(void)
+{
+ int retval;
+
+ retval = da_monitor_init_wip();
+ if (retval)
+ return retval;
+
+ rv_attach_trace_probe("wip", /* XXX: tracepoint */, handle_preempt_disable);
+ rv_attach_trace_probe("wip", /* XXX: tracepoint */, handle_preempt_enable);
+ rv_attach_trace_probe("wip", /* XXX: tracepoint */, handle_sched_waking);
+
+ return 0;
+}
+
+static void stop_wip(void)
+{
+ rv_wip.enabled = 0;
+
+ rv_detach_trace_probe("wip", /* XXX: tracepoint */, handle_preempt_disable);
+ rv_detach_trace_probe("wip", /* XXX: tracepoint */, handle_preempt_enable);
+ rv_detach_trace_probe("wip", /* XXX: tracepoint */, handle_sched_waking);
+
+ da_monitor_destroy_wip();
+}
+
+/*
+ * This is the monitor register section.
+ */
+struct rv_monitor rv_wip = {
+ .name = "wip",
+ .description = "auto-generated wip",
+ .start = start_wip,
+ .stop = stop_wip,
+ .reset = da_monitor_reset_all_wip,
+ .enabled = 0,
+};
+
+int register_wip(void)
+{
+ rv_register_monitor(&rv_wip);
+ return 0;
+}
+
+void unregister_wip(void)
+{
+ if (rv_wip.enabled)
+ stop_wip();
+
+ rv_unregister_monitor(&rv_wip);
+}
+
+module_init(register_wip);
+module_exit(unregister_wip);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("dot2k: auto-generated");
+MODULE_DESCRIPTION("wip");
diff --git a/kernel/trace/rv/monitors/wip/wip.h b/kernel/trace/rv/monitors/wip/wip.h
new file mode 100644
index 000000000000..3055ea331706
--- /dev/null
+++ b/kernel/trace/rv/monitors/wip/wip.h
@@ -0,0 +1,38 @@
+enum states_wip {
+ preemptive_wip = 0,
+ non_preemptive_wip,
+ state_max_wip
+};
+
+enum events_wip {
+ preempt_disable_wip = 0,
+ preempt_enable_wip,
+ sched_waking_wip,
+ event_max_wip
+};
+
+struct automaton_wip {
+ char *state_names[state_max_wip];
+ char *event_names[event_max_wip];
+ char function[state_max_wip][event_max_wip];
+ char initial_state;
+ char final_states[state_max_wip];
+};
+
+struct automaton_wip automaton_wip = {
+ .state_names = {
+ "preemptive",
+ "non_preemptive"
+ },
+ .event_names = {
+ "preempt_disable",
+ "preempt_enable",
+ "sched_waking"
+ },
+ .function = {
+ { non_preemptive_wip, -1, -1 },
+ { -1, preemptive_wip, non_preemptive_wip },
+ },
+ .initial_state = preemptive_wip,
+ .final_states = { 1, 0 },
+};
--
2.35.1
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