From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 469C4459CC; Wed, 18 Sep 2024 17:05:05 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 16210410E8; Wed, 18 Sep 2024 17:05:05 +0200 (CEST) Received: from mail-pf1-f179.google.com (mail-pf1-f179.google.com [209.85.210.179]) by mails.dpdk.org (Postfix) with ESMTP id A1AF14025E for ; Wed, 18 Sep 2024 17:05:03 +0200 (CEST) Received: by mail-pf1-f179.google.com with SMTP id d2e1a72fcca58-7198cb6bb02so169324b3a.3 for ; Wed, 18 Sep 2024 08:05:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20230601.gappssmtp.com; s=20230601; t=1726671903; x=1727276703; darn=dpdk.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:from:to:cc:subject:date :message-id:reply-to; bh=axyvUE1o8/YDgOdJZ50IusG8Ntadi8zZghxgmek/n4M=; b=DoI1dMI8um0w9Bg2kPCqi29unrX0FPVY24bQhSj+kd0HaRhkpVvbiilK8SUpe9gZCN Ye5JxatbC2pu8D8+ZF7uHHqqt/gp4Z+WkTzi6IzHgvrKQRuhxo7Kj1/2utCjap2s6N4T 2PtFhIgAr94ET2RQ8UPGhxsnM9JxZeqaWS2IFiSiwmh5hOKN+TqE9ilXuw4PAQujLKFk cg8n9uPo/D4GPLp5rihn62yxHnBEImYtPqhkt4KxLCeUDB9uqs6GESszYChm/fZZTnCy CoGcgmMcys156ZT7UiwmrUYTojrTNCIdsq/d2vlMbk/oeZfyL9YTBcRQPKSozsDS9ZyE E1HA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1726671903; x=1727276703; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=axyvUE1o8/YDgOdJZ50IusG8Ntadi8zZghxgmek/n4M=; b=qfT/oxheqT+gMFyffBL/40/TOH3y0loGe5VXx7qtQ6knv1dxHEnjPnOlV5lI07Ha2d VhT7EBwR2yrxhXyxkoioRpJjLKNYnhMnba9lmM6PfUIuns2xI14D31jRvjyD/bMGKyYX uNhNQpEy84jxGRaM12fZSz7WIHECifccG4WkgcK/hweh5Ggs/hjCJXHEYtW3JNZWn9ha L0h/GcxrIkZ79li97JpZsdB2k5yHcFOX66sUgGpiUBKKFq4pf5BHiu5fOgE1ft3gqlUg BSGZsWEO0P12twWwki+yV+XFYfk2s4c7jQ7+yBVP3I71v69m7xYmqA5PL66RyNrhhVA4 7nsw== X-Gm-Message-State: AOJu0YzShdP9kOgePKEMjVDymuiKAs4SvnW3vXrLoQLmWiZc7L9bzZhx 3nulMQtVsOAkpk772JR+Wp2zKQR5ba0gKrUFefYi3O0AiprTF21Lc+ZQVZdftzs= X-Google-Smtp-Source: AGHT+IGhdyAd1e8fKX9prvFsSbMBcTJ4qam27EHVH0M2FNnfavOXVWpUNt0H6JXTAA7fOApCRrzOGw== X-Received: by 2002:a05:6a00:4f90:b0:714:1849:2503 with SMTP id d2e1a72fcca58-71926055cfamr35259669b3a.6.1726671902644; Wed, 18 Sep 2024 08:05:02 -0700 (PDT) Received: from hermes.local (204-195-96-226.wavecable.com. [204.195.96.226]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-71944aba55fsm6847175b3a.80.2024.09.18.08.05.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Sep 2024 08:05:02 -0700 (PDT) Date: Wed, 18 Sep 2024 08:05:00 -0700 From: Stephen Hemminger To: fengchengwen Cc: , Morten =?UTF-8?B?QnLDuHJ1cA==?= Subject: Re: [PATCH v23 11/15] log: add timestamp option Message-ID: <20240918080500.3739c0ab@hermes.local> In-Reply-To: <9522e9c9-f696-48d0-a080-bf5e6c54f9e6@huawei.com> References: <20200814173441.23086-1-stephen@networkplumber.org> <20240918045830.3798-1-stephen@networkplumber.org> <20240918045830.3798-12-stephen@networkplumber.org> <9522e9c9-f696-48d0-a080-bf5e6c54f9e6@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org On Wed, 18 Sep 2024 15:37:49 +0800 fengchengwen wrote: > ... > > > + > > +static enum { > > + LOG_TIMESTAMP_NONE = 0, > > + LOG_TIMESTAMP_TIME, /* time since start */ > > + LOG_TIMESTAMP_DELTA, /* time since last message */ > > + LOG_TIMESTAMP_RELTIME, /* relative time since last message */ > > + LOG_TIMESTAMP_CTIME, /* Unix standard time format */ > > + LOG_TIMESTAMP_ISO, /* ISO8601 time format */ > > Some of the impl should consider multiple-thread safety. > > And for multiple-process, how about the secondary-processes align the main-process. As much as possible, they are thread safe, that is why locatime_r is used. Of course if multiple threads are printing it is possible that time stamps could be out of order. I.e CPU A got timestamp and is formatting message, and CPU B got timestamp is formatting message. The formatting might take longer for A.