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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3AB39C433F5 for ; Tue, 1 Mar 2022 19:53:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235987AbiCATyE (ORCPT ); Tue, 1 Mar 2022 14:54:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46518 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234807AbiCATyC (ORCPT ); Tue, 1 Mar 2022 14:54:02 -0500 Received: from gateway23.websitewelcome.com (gateway23.websitewelcome.com [192.185.50.107]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E0BBE2459A for ; Tue, 1 Mar 2022 11:53:15 -0800 (PST) Received: from cm10.websitewelcome.com (cm10.websitewelcome.com [100.42.49.4]) by gateway23.websitewelcome.com (Postfix) with ESMTP id 372BB104DA for ; Tue, 1 Mar 2022 13:53:14 -0600 (CST) Received: from gator4132.hostgator.com ([192.185.4.144]) by cmsmtp with SMTP id P8YcnDZs9RnrrP8Ycn6tBF; Tue, 01 Mar 2022 13:53:14 -0600 X-Authority-Reason: nr=8 Received: from host-95-232-30-176.retail.telecomitalia.it ([95.232.30.176]:40048 helo=[10.0.0.45]) by gator4132.hostgator.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94.2) (envelope-from ) id 1nP8Yb-0018Dp-QQ; Tue, 01 Mar 2022 13:53:14 -0600 Message-ID: <9d346a5b-5763-0d82-c06d-a5802b3cb816@kernel.org> Date: Tue, 1 Mar 2022 20:53:10 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [PATCH] tracing/osnoise: Force quiescent states while tracing Content-Language: en-US To: paulmck@kernel.org Cc: Nicolas Saenz Julienne , rostedt@goodmis.org, mingo@redhat.com, linux-kernel@vger.kernel.org, mtosatti@redhat.com References: <20220228141423.259691-1-nsaenzju@redhat.com> <137d3573-051f-5374-70d6-cc99b44d00da@kernel.org> <69e92bc6-0917-17e9-1b61-d884d30ba42c@kernel.org> <20220301180509.GQ4285@paulmck-ThinkPad-P17-Gen-1> <20220301185823.GS4285@paulmck-ThinkPad-P17-Gen-1> <6fd678d8-58fc-5863-fd88-4c8335dd8b38@kernel.org> <20220301194601.GT4285@paulmck-ThinkPad-P17-Gen-1> From: Daniel Bristot de Oliveira In-Reply-To: <20220301194601.GT4285@paulmck-ThinkPad-P17-Gen-1> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator4132.hostgator.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - kernel.org X-BWhitelist: no X-Source-IP: 95.232.30.176 X-Source-L: No X-Exim-ID: 1nP8Yb-0018Dp-QQ X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: host-95-232-30-176.retail.telecomitalia.it ([10.0.0.45]) [95.232.30.176]:40048 X-Source-Auth: kernel@bristot.me X-Email-Count: 8 X-Source-Cap: YnJpc3RvdG1lO2JyaXN0b3RtZTtnYXRvcjQxMzIuaG9zdGdhdG9yLmNvbQ== X-Local-Domain: no Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/1/22 20:46, Paul E. McKenney wrote: >> But the idea is to see the noise for an user-space application as much as >> possible (and no, I am not doing application in kernel... but I know people >> doing it using a unikernel, but that is another story... a longer one... :-)). > There have been people writing their applications in Linux kernel modules, > or at least attempting to do so! ;-) I have to admit, I once made a kernel application to forward RTP packets for VoIP communication, between FPGA/DSPs and network with zero-copy. Times were others, 200MHz of CPU, a single AMBA bus to everybody... fun times :-) But that is not the case anymore (phew). -- Daniel