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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 4BF42C433E0 for ; Tue, 23 Jun 2020 00:38:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2340420809 for ; Tue, 23 Jun 2020 00:38:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592872730; bh=Ydu2oBm0v1WiaUpnb+3/siqJX72BjmdCrHbn1bkGYeM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=nD+oDYjJbe8ez6IG5/5fmovceURDEuQtuG1rSjMp5hQeaK8/6cB8EM35jUPwHkCcR zOM1JwXCaKFiNAIxqWTLwQ2Eq1NF5JgOKJy4hvU0XVXyx5oHMITaMom+7OYzU6d/lK x5QRTxUAZqIYDnxXO4NZ5gHkIa0Wy2wXV1jSiz8I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732236AbgFWAig (ORCPT ); Mon, 22 Jun 2020 20:38:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:33670 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732161AbgFWAh5 (ORCPT ); Mon, 22 Jun 2020 20:37:57 -0400 Received: from paulmck-ThinkPad-P72.home (50-39-105-78.bvtn.or.frontiernet.net [50.39.105.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8DF0D21473; Tue, 23 Jun 2020 00:37:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592872677; bh=Ydu2oBm0v1WiaUpnb+3/siqJX72BjmdCrHbn1bkGYeM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=X0Oas14gBB0UKOXnlZSq27adUvTbyhNK/30CdYOFhIHN/hs10SJX06vwkhX6pbZmQ nafAnk5NM2tsHsVWJn80W9RTQswJbJz7aRIDi6pJ0lZIKU9DohYvz99Xf4MRnxqWI0 gMzdPtqgY4zRc9sx9BZWDh5TTZ+mrVeN2nj876IA= From: paulmck@kernel.org To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com, mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org, "Paul E. McKenney" Subject: [PATCH tip/core/rcu 18/23] torture: Add more tracing crib notes to kvm.sh Date: Mon, 22 Jun 2020 17:37:47 -0700 Message-Id: <20200623003752.26872-18-paulmck@kernel.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20200623003731.GA26717@paulmck-ThinkPad-P72> References: <20200623003731.GA26717@paulmck-ThinkPad-P72> Sender: rcu-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org From: "Paul E. McKenney" This commit adds a few more hints about how to use tracing as comments at the end of kvm.sh. Signed-off-by: Paul E. McKenney --- tools/testing/selftests/rcutorture/bin/kvm.sh | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh index 3578c85..bdfa0c0 100755 --- a/tools/testing/selftests/rcutorture/bin/kvm.sh +++ b/tools/testing/selftests/rcutorture/bin/kvm.sh @@ -503,3 +503,7 @@ fi # Tracing: trace_event=rcu:rcu_grace_period,rcu:rcu_future_grace_period,rcu:rcu_grace_period_init,rcu:rcu_nocb_wake,rcu:rcu_preempt_task,rcu:rcu_unlock_preempted_task,rcu:rcu_quiescent_state_report,rcu:rcu_fqs,rcu:rcu_callback,rcu:rcu_kfree_callback,rcu:rcu_batch_start,rcu:rcu_invoke_callback,rcu:rcu_invoke_kfree_callback,rcu:rcu_batch_end,rcu:rcu_torture_read,rcu:rcu_barrier # Function-graph tracing: ftrace=function_graph ftrace_graph_filter=sched_setaffinity,migration_cpu_stop # Also --kconfig "CONFIG_FUNCTION_TRACER=y CONFIG_FUNCTION_GRAPH_TRACER=y" +# Control buffer size: --bootargs trace_buf_size=3k +# Get trace-buffer dumps on all oopses: --bootargs ftrace_dump_on_oops +# Ditto, but dump only the oopsing CPU: --bootargs ftrace_dump_on_oops=orig_cpu +# Heavy-handed way to also dump on warnings: --bootargs panic_on_warn -- 2.9.5