From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f180.google.com (mail-pf0-f180.google.com [209.85.192.180]) by dpdk.org (Postfix) with ESMTP id ED572726F for ; Wed, 21 Mar 2018 15:48:45 +0100 (CET) Received: by mail-pf0-f180.google.com with SMTP id a16so2053797pfn.9 for ; Wed, 21 Mar 2018 07:48:45 -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=W1PkcO48dHSPzbXIVmNgd5JMgi59M4Sq1rU2LhaWZiw=; b=hLn0Qym9cdJ6ee1U4tK9HmDGDmg+xdHBcIvCNEHNOzyP0DnYbAaJ899aODz4IR2G11 sLxlGshRYoInXZNbp/K8uNpECJc+PPI3eDv2gYsK2Ev3OoE1eA0DMrPqIhl+am49vnSx ezPV/xqU4oBDLBSGud+O5bJvIwiAIvdTl9OaRYbhhqATazuxh+Lrg21J/GMr9IQZ7H6g nZcLz0/X3VH+CjcEduxIhaUXa87VyJvko+YMB6tKZE9Orf3vYDOrOR8tpP7kYlZZmp2m +DyIMxVWLWcJAFw3TCbuWzowYvbAgeuwZzMCrNg/zDdX5wiZpqWMP4te9rCf/Rw3PQbZ 2IaA== 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=W1PkcO48dHSPzbXIVmNgd5JMgi59M4Sq1rU2LhaWZiw=; b=cuvQcTgHMWHQakNwo9R9Dv8QqxHN0e3q1zq3caH13U6V7PP6dcXkyAXxqZAPHmugX5 9w+9GGcMJ84SOT7KfBv7HtM9XJZWf9PFWQpUsxUZsfJLMEoueNzJy/RghxatcHEmZCSZ t4eLRe+GanJ2547MKn8h/R3YE2CMKh0ntZob92lJSJOiTCONenz+0oSOmNlaLXj7Spu4 EwDG4fL4VCzCwFLNtV6l5rBGmHU5L49iVx6kcxxl2NvpisWaoQCDQmGH8PT5+5qQhg06 Qs++zE0iiVD5Y1lK4Bpo9uTxiJ7TzSBv+4wictJzCjnkYD6JBPQUINgy/s1YhTmfIU2U Mq5g== X-Gm-Message-State: AElRT7Fx4YnwwqEEnGHW11ZR5m5DBoHcqqkUVzy+agf2nPKO20rqWQjD yi/WfMeMEOwx4hyb1EadWmiwBo9KJFI= X-Google-Smtp-Source: AG47ELsfIMfvgeoV5lkyalKf3fgD0wNy2if9o4btZyKtflVJsbEanCJqu5to1hxXgMNtG2B1fGu/RA== X-Received: by 10.99.126.73 with SMTP id o9mr15416322pgn.406.1521643725048; Wed, 21 Mar 2018 07:48:45 -0700 (PDT) Received: from xeon-e3 (204-195-71-95.wavecable.com. [204.195.71.95]) by smtp.gmail.com with ESMTPSA id m185sm104873pfc.132.2018.03.21.07.48.44 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 21 Mar 2018 07:48:44 -0700 (PDT) Date: Wed, 21 Mar 2018 07:48:33 -0700 From: Stephen Hemminger To: shengxiao qian Cc: users@dpdk.org Message-ID: <20180321074833.6a3d2656@xeon-e3> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [dpdk-users] wrong core receive the package 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: , X-List-Received-Date: Wed, 21 Mar 2018 14:48:46 -0000 On Wed, 21 Mar 2018 11:13:19 +0800 shengxiao qian wrote: > Hi there; > Our machine has 2 cpus=EF=BC=88Intel(R) Xeon(R) CPU E5-2630 v4 @ 2.20= GHz=EF=BC=89with > 40 cores. > If the core num is less than or equal to 16. the application with dpdk > works fine.But if the core num more than 16.there is something wrong with > it. > In our test scenario(more then 16 cores), server a is a tcp client and > server b is a tcp server. Server a sends a syn packet to server B with > core1, and server B returns a syn ack message to server a.Although the ha= sh > value of these two packets is the same, syn ack packets are distributed to > server a other core(not the send core),Can anyone give some help? >=20 RSS hash is not symmetrical. The SYN and SYN-ACK packets have swapped address and port (src/dest); therefore the hash will be different. There are some weaker RSS hash keys that are symmetrical.