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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 99088C43219 for ; Wed, 1 May 2019 19:16:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6AF962177B for ; Wed, 1 May 2019 19:16:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726209AbfEATQ6 (ORCPT ); Wed, 1 May 2019 15:16:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:40448 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726096AbfEATQ5 (ORCPT ); Wed, 1 May 2019 15:16:57 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C9A4C2081C; Wed, 1 May 2019 19:16:56 +0000 (UTC) Date: Wed, 1 May 2019 15:16:55 -0400 From: Steven Rostedt To: "Paul E. McKenney" Cc: Peter Zijlstra , linux-kernel@vger.kernel.org, andrea.parri@amarulasolutions.com Subject: Re: Question about sched_setaffinity() Message-ID: <20190501151655.51469a4c@gandalf.local.home> In-Reply-To: <20190501191213.GX3923@linux.ibm.com> References: <20190427180246.GA15502@linux.ibm.com> <20190430100318.GP2623@hirez.programming.kicks-ass.net> <20190430105129.GA3923@linux.ibm.com> <20190430115551.GT2623@hirez.programming.kicks-ass.net> <20190501191213.GX3923@linux.ibm.com> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 1 May 2019 12:12:13 -0700 "Paul E. McKenney" wrote: > OK, what I did was to apply the patch at the end of this email to -rcu > branch dev, then run rcutorture as follows: > > nohup tools/testing/selftests/rcutorture/bin/kvm.sh --cpus 8 --duration 2 --configs "TRIVIAL" --bootargs "trace_event=sched:sched_switch,sched:sched_wakeup ftrace=function_graph ftrace_graph_filter=sched_setaffinity,migration_cpu_stop" > > This resulted in the console output that I placed here: > > http://www2.rdrop.com/~paulmck/submission/console.log.gz > > But I don't see calls to sched_setaffinity() or migration_cpu_stop(). > Steve, is something else needed on the kernel command line in addition to > the following? > > ftrace=function_graph ftrace_graph_filter=sched_setaffinity,migration_cpu_stop Do you have function graph enabled in the config? [ 2.098303] ftrace bootup tracer 'function_graph' not registered. -- Steve