From patchwork Thu May 5 16:06:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Bristot de Oliveira X-Patchwork-Id: 12839736 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0A96BC433FE for ; Thu, 5 May 2022 16:08:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1381784AbiEEQMB (ORCPT ); Thu, 5 May 2022 12:12:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60144 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1381746AbiEEQLw (ORCPT ); Thu, 5 May 2022 12:11:52 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C5CCE5C667; Thu, 5 May 2022 09:07:56 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 7D99AB82DF4; Thu, 5 May 2022 16:07:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 84F62C385B3; Thu, 5 May 2022 16:07:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1651766874; bh=klaEUR0NZ1KM/QJT1bStAAWRqh9uRYsY58s/dwSZMfg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=m0KIj1qpqqA9D9cNK1d5/9BWpHfYY6Vx6B8Ttjsxw2E95PT/k0onE8nUAhSg2TQj6 gPiJXGTDBwmQ4xLDIvZnQ7oCg8vn57OJamCZbem13CpgjIWgsF4+JU9+74wY7xE2Tq 8RvU+h49biMErKYfiLn+d19GkUwruDEuHgHlbr/S0uJqsiV1RnuYHmYMfaD6mmyrNC 5LrnQLUjo6ryVVEHW3InpKWHdy/2v/oFyd0b072BCUM8eETZeDiYqNJmwEEbF2LmqC TfwpgDtSM0v8jfqj3Sr52bj+PjgVZ4TQanBiBNQfqMO6Sng97W4ac3oCo10+w5hklx uD4drrTjIgAWA== From: Daniel Bristot de Oliveira To: Steven Rostedt , linux-kernel@vger.kernel.org Cc: Daniel Bristot de Oliveira , Jonathan Corbet , Ingo Molnar , Thomas Gleixner , Peter Zijlstra , Will Deacon , Catalin Marinas , Marco Elver , Dmitry Vyukov , "Paul E. McKenney" , Shuah Khan , Gabriele Paoloni , Juri Lelli , Clark Williams , linux-doc@vger.kernel.org, linux-trace-devel@vger.kernel.org Subject: [RFC V3 08/20] rv/monitor: Add the wip monitor skeleton created by dot2k Date: Thu, 5 May 2022 18:06:48 +0200 Message-Id: <2e2bd513d229ad96fbb014a75cc628e83f5f3b03.1651766361.git.bristot@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org 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: Jonathan Corbet Cc: Steven Rostedt Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Peter Zijlstra Cc: Will Deacon Cc: Catalin Marinas Cc: Marco Elver Cc: Dmitry Vyukov Cc: "Paul E. McKenney" Cc: Shuah Khan Cc: Gabriele Paoloni Cc: Juri Lelli Cc: Clark Williams 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 --- kernel/trace/rv/monitor_wip/model.h | 38 +++++++++ kernel/trace/rv/monitor_wip/wip.c | 115 ++++++++++++++++++++++++++++ kernel/trace/rv/monitor_wip/wip.h | 64 ++++++++++++++++ 3 files changed, 217 insertions(+) create mode 100644 kernel/trace/rv/monitor_wip/model.h create mode 100644 kernel/trace/rv/monitor_wip/wip.c create mode 100644 kernel/trace/rv/monitor_wip/wip.h diff --git a/kernel/trace/rv/monitor_wip/model.h b/kernel/trace/rv/monitor_wip/model.h new file mode 100644 index 000000000000..5212ba5b1dfb --- /dev/null +++ b/kernel/trace/rv/monitor_wip/model.h @@ -0,0 +1,38 @@ +enum states_wip { + preemptive = 0, + non_preemptive, + state_max +}; + +enum events_wip { + preempt_disable = 0, + preempt_enable, + sched_waking, + event_max +}; + +struct automaton_wip { + char *state_names[state_max]; + char *event_names[event_max]; + char function[state_max][event_max]; + char initial_state; + char final_states[state_max]; +}; + +struct automaton_wip automaton_wip = { + .state_names = { + "preemptive", + "non_preemptive" + }, + .event_names = { + "preempt_disable", + "preempt_enable", + "sched_waking" + }, + .function = { + { non_preemptive, -1, -1 }, + { -1, preemptive, non_preemptive }, + }, + .initial_state = preemptive, + .final_states = { 1, 0 }, +}; \ No newline at end of file diff --git a/kernel/trace/rv/monitor_wip/wip.c b/kernel/trace/rv/monitor_wip/wip.c new file mode 100644 index 000000000000..cd7795b282d6 --- /dev/null +++ b/kernel/trace/rv/monitor_wip/wip.c @@ -0,0 +1,115 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include +#include +#include +#include + +#define MODULE_NAME "wip" + +/* + * XXX: include required tracepoint headers, e.g., + * #include + */ + +/* + * This is the self-generated part of the monitor. Generally, there is no need + * to touch this section. + */ +#include "model.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); + +#define CREATE_TRACE_POINTS +#include "wip.h" + +/* + * 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); +} + +static void handle_preempt_enable(void *data, /* XXX: fill header */) +{ + da_handle_event_wip(preempt_enable); +} + +static void handle_sched_waking(void *data, /* XXX: fill header */) +{ + da_handle_event_wip(sched_waking); +} + + +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/monitor_wip/wip.h b/kernel/trace/rv/monitor_wip/wip.h new file mode 100644 index 000000000000..7a751a8896e9 --- /dev/null +++ b/kernel/trace/rv/monitor_wip/wip.h @@ -0,0 +1,64 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM rv + +#if !defined(_WIP_TRACE_H) || defined(TRACE_HEADER_MULTI_READ) +#define _WIP_TRACE_H + +#include + +TRACE_EVENT(event_wip, + + TP_PROTO(char state, char event, char next_state, bool safe), + + TP_ARGS(state, event, next_state, safe), + + TP_STRUCT__entry( + __field( char, state ) + __field( char, event ) + __field( char, next_state ) + __field( bool, safe ) + ), + + TP_fast_assign( + __entry->state = state; + __entry->event = event; + __entry->next_state = next_state; + __entry->safe = safe; + ), + + TP_printk("%s x %s -> %s %s", + model_get_state_name_wip(__entry->state), + model_get_event_name_wip(__entry->event), + model_get_state_name_wip(__entry->next_state), + __entry->safe ? "(safe)" : "") +); + +TRACE_EVENT(error_wip, + + TP_PROTO(char state, char event), + + TP_ARGS(state, event), + + TP_STRUCT__entry( + __field( char, state ) + __field( char, event ) + ), + + TP_fast_assign( + __entry->state = state; + __entry->event = event; + ), + + TP_printk("event %s not expected in the state %s", + model_get_event_name_wip(__entry->event), + model_get_state_name_wip(__entry->state)) +); + +#endif /* _WIP_H */ + +/* This part ust be outside protection */ +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH . +#define TRACE_INCLUDE_FILE wip +#include