From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <dev-bounces@dpdk.org>
Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124])
	by inbox.dpdk.org (Postfix) with ESMTP id A9EA1A0032;
	Wed, 17 Aug 2022 03:25:35 +0200 (CEST)
Received: from [217.70.189.124] (localhost [127.0.0.1])
	by mails.dpdk.org (Postfix) with ESMTP id 4AC5740150;
	Wed, 17 Aug 2022 03:25:35 +0200 (CEST)
Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188])
 by mails.dpdk.org (Postfix) with ESMTP id C96D3400D6
 for <dev@dpdk.org>; Wed, 17 Aug 2022 03:25:33 +0200 (CEST)
Received: from dggpeml500024.china.huawei.com (unknown [172.30.72.54])
 by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4M6qwb2zq3zXdct
 for <dev@dpdk.org>; Wed, 17 Aug 2022 09:21:19 +0800 (CST)
Received: from [127.0.0.1] (10.67.100.224) by dggpeml500024.china.huawei.com
 (7.185.36.10) with Microsoft SMTP Server (version=TLS1_2,
 cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Wed, 17 Aug
 2022 09:25:30 +0800
Subject: Re: [RFC] Dynamic log/trace control via telemetry
To: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>, <dev@dpdk.org>
References: <20220816021738.5498f802@sovereign>
From: fengchengwen <fengchengwen@huawei.com>
Message-ID: <245296ed-058b-2f6c-2243-70c49b122b19@huawei.com>
Date: Wed, 17 Aug 2022 09:25:30 +0800
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101
 Thunderbird/68.11.0
MIME-Version: 1.0
In-Reply-To: <20220816021738.5498f802@sovereign>
Content-Type: text/plain; charset="utf-8"
Content-Language: en-US
Content-Transfer-Encoding: 7bit
X-Originating-IP: [10.67.100.224]
X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To
 dggpeml500024.china.huawei.com (7.185.36.10)
X-CFilter-Loop: Reflected
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <https://mails.dpdk.org/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://mails.dpdk.org/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <https://mails.dpdk.org/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org

On 2022/8/16 7:17, Dmitry Kozlyuk wrote:
> When debugging a live app, useful info can be obtained from logs or traces
> that were not enabled when it was started and it is undesirable to restart.
> Furthermore, unless the app authors have considered tracing,
> rte_trace_save() is only called on exit, i.e. a shutdown is required again.

Good idea!