From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 910A5A0521; Tue, 3 Nov 2020 17:08:53 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 6DC14C30D; Tue, 3 Nov 2020 17:08:52 +0100 (CET) Received: from mail-pf1-f196.google.com (mail-pf1-f196.google.com [209.85.210.196]) by dpdk.org (Postfix) with ESMTP id 7C1DEBE4B for ; Tue, 3 Nov 2020 17:08:50 +0100 (CET) Received: by mail-pf1-f196.google.com with SMTP id b3so14632414pfo.2 for ; Tue, 03 Nov 2020 08:08:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=2Y8JWV8jMZJpeQLf3Isi8kx3fJ0kuOgC3+SujeJaFlM=; b=TIVVkqNBo2EG6snRb0t+dY3xW3eABImprDoebpxrJDRKGQSosFSUpo/6Ym0yRIjXqb Fh4cUeG7+DsuE8l0ZBNJ0oxS988muQgF1tN4ScdtU8OmyGiSiQ/kW6hAse5GY5hHiNKe wBHhsvz1ysJSCNf2rxlXmYqpN6uUem0hEFeNAiIYTBD2NA9L9gKUI8q45EmJo87MvjFH OUSQMGOa+jCA/X8lwwYGdlQ7l5XATWHTYCuPJomOEmG9WPUQ9uumoa+7NfEWgXBf8+IC b7nH3k/WSmpO5QvpoRDB8yuVTMz/3VyDIgcM6tRBcHvbcl5DM8kWabQUd6bE9o8iJA3/ KRwQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=2Y8JWV8jMZJpeQLf3Isi8kx3fJ0kuOgC3+SujeJaFlM=; b=YqhXEer/DFKo6KjoqTbJdPmMAJx2me8kliNDts124ibKYjgXRtLJ79Bnx+htZu3t1c gNo++y+hhQcsPjrrhjV6SGrbOOqlg8hW+LU4LPaspEIvvRLwke+v7tU8+f3MI0AI0Nvw hjOQl3FlSd3OyFHBsydJyHmZ1lLHBVDebotpd176EF8/JXCuY0DAEjJN4cToPfft02IY rAIOZHYiCFGc2+JpV1Wn1ev49T8KRWesRvoAfIQAr4Jntd7OFLlwPcsLnKdu4LKncexk tdde1Ds4PMMGoYTe84Z4EoouXBhpNMSrHZ803zy6dvvJ/6m6NfOCa3Dox7qAybi2vs49 TdrQ== X-Gm-Message-State: AOAM530RuXjf44YxLcmSnN+587LdRNsl9jD8y8/cQEmxcDUIWmylBLd+ T/28sQzoZ50YeEOj9/T3emAgMg== X-Google-Smtp-Source: ABdhPJwKKxy/poYbdvU/D3A83/YDhYN9BXZ2TmgHVvLNLYceieoBv0mUBQ9rIvlrs4+abhJEFYPgCA== X-Received: by 2002:a63:6585:: with SMTP id z127mr6742185pgb.210.1604419728741; Tue, 03 Nov 2020 08:08:48 -0800 (PST) Received: from hermes.local (204-195-22-127.wavecable.com. [204.195.22.127]) by smtp.gmail.com with ESMTPSA id 136sm17706156pfa.132.2020.11.03.08.08.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Nov 2020 08:08:48 -0800 (PST) Date: Tue, 3 Nov 2020 08:08:39 -0800 From: Stephen Hemminger To: Thomas Monjalon Cc: dev@dpdk.org, ferruh.yigit@intel.com, david.marchand@redhat.com, bruce.richardson@intel.com, olivier.matz@6wind.com, andrew.rybchenko@oktetlabs.ru, jerinj@marvell.com, viacheslavo@nvidia.com Message-ID: <20201103080839.4d7d50ab@hermes.local> In-Reply-To: <20201103140931.488700-1-thomas@monjalon.net> References: <20201029092751.3837177-1-thomas@monjalon.net> <20201103140931.488700-1-thomas@monjalon.net> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-dev] [PATCH v5 00/16] remove mbuf timestamp X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On Tue, 3 Nov 2020 15:09:15 +0100 Thomas Monjalon wrote: > The mbuf field timestamp was announced to be removed for three reasons: > - a dynamic field already exist, used for Tx only > - this field always used 8 bytes even if unneeded > - this field is in the first half (cacheline) of mbuf > > After this series, the dynamic field timestamp is used for both Rx and Tx > with separate dynamic flags to distinguish when the value is meaningful > without resetting the field during forwarding. There should be a place in documentation which describes all the dynamic fields and their meaning. For example, which drivers/features set the field and the exact meaning. Is the timestamp in HW units, UTC units, or TSC ticks?