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 08FD0A2EDB for ; Mon, 30 Sep 2019 17:00:23 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 0795E1BF40; Mon, 30 Sep 2019 16:59:48 +0200 (CEST) Received: from mail-pf1-f170.google.com (mail-pf1-f170.google.com [209.85.210.170]) by dpdk.org (Postfix) with ESMTP id 999031B948 for ; Mon, 30 Sep 2019 16:59:46 +0200 (CEST) Received: by mail-pf1-f170.google.com with SMTP id y5so5775214pfo.4 for ; Mon, 30 Sep 2019 07:59:46 -0700 (PDT) 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=pwuqznJP7aJZBPBGFP4uVo0nk3C5w3htFo6Ern4+vqU=; b=l7ckiY56ISUtim0jjQr07BnleI2BOQqcp5cW7YUh9P1EEDzaygArV+FDtCoaNDSNrw EaWKiMxWeV+2jFDXZc3hfxpobyADu/CUCx2L93GHu5isY3zMW96w4fKeCLvGGLVzTe5f OOASN1HNJ568VjMBUyo6k/0Bg5eGLal/0O5kdX51RnjlILUvWHRwM75LSqEo90c220jq 807CDLxDMrFyxCyVpDajCZ54r/z1g0YL93mq/nb56I2+kHZWKrUd6gFocq2oqoIJHueT sxfnCpFiizKLTRn5NSD4fzXobEkVLTpOfAwS5eX09TJL3tQKqMMbjymS+LJ/WzR1Zcoy 7RvQ== 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=pwuqznJP7aJZBPBGFP4uVo0nk3C5w3htFo6Ern4+vqU=; b=aW7C4q1XcjOwD3F8xtpYR/zNhCCgwY+54fsBTScfJykDFqBsoQyW19NTNJ8LObJ2FL SYHGBnTxMzeG1E/8sTYUIql4K72I13Ij3eDZRQSXYhvFe5XiP/L+fOxdYCWRoz98U3aJ AfAIRdqmozYqjl+gGhLuIUYdvYA4nia7lBTwmZnB4myBb0tzZUsBpjkuW9VYiG1vpuYw pTpMyHnIfvsarTSraGEqs2J9hDum0qdbeFBZRHSu9NrUGU5qR1zH6oI+xkHpvlfPSIhT bj0icsRo8zjwWFGu9IFREkLKJXNkGUa5ndYPOx3e437Sqk6FVmprbpwVayz2m/6jqTBe bb8A== X-Gm-Message-State: APjAAAX5RrIcnKwnrftCE64882O12P0xNHBShJmZZTR+a7Mmtxe8JFUV mCgc1bUd2CXPrzSK2tC13dU5LQ== X-Google-Smtp-Source: APXvYqz52+XHKxOcrE6WGYJTBanvq7yob7EIXuop2Y+PlZDg5yZ91AVDVuRRQ92m9uD2fxSBiSao0g== X-Received: by 2002:a17:90a:23ee:: with SMTP id g101mr26841769pje.122.1569855585602; Mon, 30 Sep 2019 07:59:45 -0700 (PDT) Received: from hermes.lan (204-195-22-127.wavecable.com. [204.195.22.127]) by smtp.gmail.com with ESMTPSA id d1sm12248073pfc.98.2019.09.30.07.59.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Sep 2019 07:59:45 -0700 (PDT) Date: Mon, 30 Sep 2019 07:59:38 -0700 From: Stephen Hemminger To: Gaurav Bansal Cc: users@dpdk.org Message-ID: <20190930075938.77a2c70d@hermes.lan> In-Reply-To: References: <20190925221637.11fb9632@hermes.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-users] packet drops with missing rxdIdx count in vmxnet3 X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: users-bounces@dpdk.org Sender: "users" On Mon, 30 Sep 2019 11:22:19 +0530 Gaurav Bansal wrote: > hi all, > havn't heard back on this so far. Can anyone please let me know of the > possible reasons for the NIC to skip some of the indexes of the descriptor > ring in the Rx path (as also shown by the vmxnet3 logs in my previous mail) > ? > thanks, > gaurav > A packet can span multiple segments if your receive mbuf is too small to fit all the data. That would cause the receive data to create a chained mbuf.