From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f173.google.com (mail-wi0-f173.google.com [209.85.212.173]) by dpdk.org (Postfix) with ESMTP id 03D49156 for ; Thu, 2 Jan 2014 14:58:29 +0100 (CET) Received: by mail-wi0-f173.google.com with SMTP id hn9so14079601wib.6 for ; Thu, 02 Jan 2014 05:59:40 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:organization:to:subject:date:user-agent:cc :references:in-reply-to:mime-version:content-type :content-transfer-encoding:message-id; bh=+BvRtQNhNg26shsiyEuyAQb5pTM5d0EINqMjRLFoTEo=; b=BHL5ZbMZ5dIuTalauA5vE5tzNFw7631s79hDzapEkwMox7LOSJvdHLvvh9qpn0EoPF Ttlk4otbtQh2SnHA1RNdTKdsMNkPjskkSWJPYnLmVDQggC1+78ollicy1gPD5raHSNSw wDWtBySiKvfctVvA+Whhf/Cl92+/Xgk6LB/ycDWw8pbazI9tCxka5TNxWBUHTE+IaiX+ tFHDD9Bf4+TKGn8TXdIzlGnPPKN2mYI1iuRDT8uYSN2E67HOqU8QGYl5jl72tHzL0KBg YwP7hs0EVvVWz3B45zFrcUEOEVitZLKa8txRMNrjHZdDAz8kYWoUs/g5W6tD/qgTMXpx iIaA== X-Gm-Message-State: ALoCoQl9D0gdj7RwdcMWLHcaAd15ZvfL/WoIkwy2UFlqCqczIekxS8k3RekEEH0e6M8r+czSHJgS X-Received: by 10.194.237.226 with SMTP id vf2mr6745311wjc.58.1388671180377; Thu, 02 Jan 2014 05:59:40 -0800 (PST) Received: from angus.localnet (6wind.net2.nerim.net. [213.41.180.237]) by mx.google.com with ESMTPSA id pl7sm32938952wjc.16.2014.01.02.05.59.39 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 02 Jan 2014 05:59:39 -0800 (PST) From: Thomas Monjalon Organization: 6WIND To: Dmitry Vyal Date: Thu, 2 Jan 2014 14:59:38 +0100 User-Agent: KMail/1.13.7 (Linux/3.2.0-4-amd64; KDE/4.8.4; x86_64; ; ) References: <52A1CF9D.30708@gmail.com> In-Reply-To: <52A1CF9D.30708@gmail.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Message-Id: <201401021459.38669.thomas.monjalon@6wind.com> Cc: dev@dpdk.org Subject: Re: [dpdk-dev] DPDK delaying individual packets infinitely X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 02 Jan 2014 13:58:30 -0000 Hello Dmitry, 06/12/2013 14:22, Dmitry Vyal : > The application consists of two threads, first one sends the packets > from one port and second receives them on another. These are 2 ports of > four-ports 1Gb NIC. It's detected as Intel Corporation 82576 Gigabit > Network Connection (rev 01). Ports are connected with a patch cord. [...] > So looks like DPDK is buffering first 21 packets and doesn't flush the > buffer in the first run even if I wait for several seconds after last > packet is sent. In second run we see it forwards packets one by one > after first burst of size 21. > > I tried on DPDK-1.3.1 and DPDK-1.5.1 observing similar results. Is it > expected behavior? Have you made any progress on this bug ? Is it an igb-specific issue ? Can you reproduce it with ixgbe ? Thank you to keep us informed -- Thomas