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 0FAC7C4332F for ; Sat, 4 Dec 2021 13:25:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237396AbhLDN2w (ORCPT ); Sat, 4 Dec 2021 08:28:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48056 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229957AbhLDN2v (ORCPT ); Sat, 4 Dec 2021 08:28:51 -0500 Received: from out2.migadu.com (out2.migadu.com [IPv6:2001:41d0:2:aacc::]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 66AB6C061751; Sat, 4 Dec 2021 05:25:25 -0800 (PST) Date: Sat, 4 Dec 2021 21:25:09 +0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1638624322; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=mTsR7EARnIwZiWANDy8dCEHN3NQ0iA14jJz5uV9apYw=; b=n9tmpC5Cl0QXbiAoq2SvwX8X6DWANPbTwVehyegld5v8aHmTWVEFcncrpfos8TN210vWff 70CRMqBypYKc95yzdHjO6Qn5T+WSRnEysneFV1ERqfkETElQUTMW8BZndYwvbLyVGSfXzU W182ebsUeO7k1IfoyVH+09J6nrD61qs= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Tao Zhou To: Daniel Bristot de Oliveira Cc: Steven Rostedt , Ingo Molnar , Tom Zanussi , Masami Hiramatsu , Juri Lelli , Clark Williams , John Kacur , Peter Zijlstra , Thomas Gleixner , Sebastian Andrzej Siewior , Tao Zhou , linux-rt-users@vger.kernel.org, linux-trace-devel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH V8 00/14] RTLA: An interface for osnoise/timerlat tracers Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Nov 29, 2021 at 12:07:38PM +0100, Daniel Bristot de Oliveira wrote: > The rtla(1) is a meta-tool that includes a set of commands that > aims to analyze the real-time properties of Linux. But instead of > testing Linux as a black box, rtla leverages kernel tracing > capabilities to provide precise information about the properties > and root causes of unexpected results. > > To start, it presents an interface to the osnoise and timerlat tracers. > In the future, it will also serve as home to the rtsl [1] and other > latency/noise tracers. > > If you just want to run it, you can download the tarball here: > - https://bristot.me/files/rtla/tarball/rtla-0.4.tar.bz2 > > To compile rtla on fedora you need: > $ git clone git://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git > $ cd libtraceevent/ > $ make > $ sudo make install > $ cd .. > $ git clone git://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git > $ cd libtracefs/ > $ make > $ sudo make install > $ cd .. > $ sudo dnf install python3-docutils procps-devel > $ cd $rtla_src > $ make > $ sudo make install Set osnoise/x to DEADLINE, the return is not success. see: tao@geo ~/opensource/rtla-0.4 $ sudo rtla osnoise top -P d:100us:1ms -c 0-3 -r 900000 -d 1M -q boost_with_deadline failed to boost pid 4766: Operation not permitted Failed to set sched parameters top shows: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 4773 root 20 0 0 0 0 R 89.4 0.0 2:06.88 osnoise/0 4776 root 20 0 0 0 0 R 89.4 0.0 2:06.88 osnoise/3 4774 root 20 0 0 0 0 R 89.0 0.0 2:06.88 osnoise/1 4775 root 20 0 0 0 0 R 88.7 0.0 2:06.69 osnoise/2 t