From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3BD03C433ED for ; Wed, 19 May 2021 11:38:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1F8DA613AC for ; Wed, 19 May 2021 11:38:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351696AbhESLjm (ORCPT ); Wed, 19 May 2021 07:39:42 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:43784 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351431AbhESLjf (ORCPT ); Wed, 19 May 2021 07:39:35 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1621424295; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=x+e8OQD2x4QdST7+N5Ys9k8LKdCcS306UFze/tcrh04=; b=G12CszY7odq7s+FLw8IHgQPwBek3xyDM3QosgxlFrj3T6z/5casJzFD3K9bmM0+q+Vbf0r aCdDRgZhS/inP6Vehjg5x25JebjRrPK2i0YRnTlcOBVWEY2gnh0mMPy+9vXEnFGe/x0pE5 9zdQqn8TNxK9dh37ADzzbq2zUP6R6m4= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-193--OeHn6i-M5KNx9jMbIeRVg-1; Wed, 19 May 2021 07:38:13 -0400 X-MC-Unique: -OeHn6i-M5KNx9jMbIeRVg-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 57C4B1927800; Wed, 19 May 2021 11:38:11 +0000 (UTC) Received: from x1.com (ovpn-112-250.rdu2.redhat.com [10.10.112.250]) by smtp.corp.redhat.com (Postfix) with ESMTP id D2EA8687D3; Wed, 19 May 2021 11:38:03 +0000 (UTC) From: Daniel Bristot de Oliveira To: linux-kernel@vger.kernel.org, Steven Rostedt Cc: Tommaso Cucinotta , Kate Carcia , Daniel Bristot de Oliveira , Jonathan Corbet , Ingo Molnar , Mauro Carvalho Chehab , Thomas Gleixner , Peter Zijlstra , Will Deacon , Catalin Marinas , "Paul E. McKenney" , Joel Fernandes , Mathieu Desnoyers , Gabriele Paoloni , Juri Lelli , Clark Williams , linux-doc@vger.kernel.org Subject: [RFC PATCH 08/16] rv/monitors: Add the wip monitor skeleton created by dot2k Date: Wed, 19 May 2021 13:36:29 +0200 Message-Id: <84ea1e70b846e6fefdaafe4ce5e3c1a5cb49aace.1621414942.git.bristot@redhat.com> In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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: Mauro Carvalho Chehab Cc: Thomas Gleixner Cc: Peter Zijlstra Cc: Will Deacon Cc: Catalin Marinas Cc: "Paul E. McKenney" Cc: Joel Fernandes Cc: Mathieu Desnoyers Cc: Gabriele Paoloni Cc: Juri Lelli Cc: Clark Williams Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Daniel Bristot de Oliveira --- kernel/trace/rv/monitors/wip/model.h | 38 ++++++++ kernel/trace/rv/monitors/wip/wip.c | 124 +++++++++++++++++++++++++++ kernel/trace/rv/monitors/wip/wip.h | 64 ++++++++++++++ 3 files changed, 226 insertions(+) create mode 100644 kernel/trace/rv/monitors/wip/model.h 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/model.h b/kernel/trace/rv/monitors/wip/model.h new file mode 100644 index 000000000000..5212ba5b1dfb --- /dev/null +++ b/kernel/trace/rv/monitors/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/monitors/wip/wip.c b/kernel/trace/rv/monitors/wip/wip.c new file mode 100644 index 000000000000..1aec75e683d2 --- /dev/null +++ b/kernel/trace/rv/monitors/wip/wip.c @@ -0,0 +1,124 @@ +#include +#include +#include +#include +#include +#include +#include + +#define MODULE_NAME "wip" + +/* + * 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. + * + */ + +void handle_preempt_disable(void *data, /* XXX: fill header */) +{ + da_handle_event_wip(preempt_disable); +} + +void handle_preempt_enable(void *data, /* XXX: fill header */) +{ + da_handle_event_wip(preempt_enable); +} + +void handle_sched_waking(void *data, /* XXX: fill header */) +{ + da_handle_event_wip(sched_waking); +} + +#define NR_TP 3 +static struct tracepoint_hook_helper tracepoints_to_hook[NR_TP] = { + { + .probe = handle_preempt_disable, + .name = /* XXX: tracepoint name here */, + .registered = 0 + }, + { + .probe = handle_preempt_enable, + .name = /* XXX: tracepoint name here */, + .registered = 0 + }, + { + .probe = handle_sched_waking, + .name = /* XXX: tracepoint name here */, + .registered = 0 + }, +}; + +static int start_wip(void) +{ + int retval; + + da_monitor_init_wip(); + + retval = thh_hook_probes(tracepoints_to_hook, NR_TP); + if (retval) + goto out_err; + + return 0; + +out_err: + return -EINVAL; +} + +static void stop_wip(void) +{ + rv_wip.enabled = 0; + thh_unhook_probes(tracepoints_to_hook, NR_TP); + return; +} + +/* + * 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 v2"); +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..7a751a8896e9 --- /dev/null +++ b/kernel/trace/rv/monitors/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 -- 2.26.2