From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qg0-f43.google.com (mail-qg0-f43.google.com [209.85.192.43]) by dpdk.org (Postfix) with ESMTP id 31E7F8E5D for ; Sat, 23 Jan 2016 15:17:59 +0100 (CET) Received: by mail-qg0-f43.google.com with SMTP id e32so78986926qgf.3 for ; Sat, 23 Jan 2016 06:17:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:from:date:message-id:subject:to:content-type; bh=F4bDLHoraoapetA7qBOVSt999fdQ1DRK8U577UAioHA=; b=s1fLY7tXzhaZc9xX67V0qMR/aSn9YDc4ucU2CT4SvyIiipSPTWqmZ9lqBH/xH8Xorj zdp2AecN3BJW8MikHwK0AX0AQp7a8xtwfU6XNU/3a7GLQyeyKzA6OygO2Chhl7Y0Vjpw 5KGsipjj0pwuS9o7PiGmW6gHb8w5SKRlUDbxEH8T7yrTIi50892jy65I0JLuFJJKXn2E zEnkttC3nu7aTozIXnp0jqUbpvwSo0aDAOkS9J2kIrjPO5jiD0/0W6k1XUrW1NJuJrBo dS76FvSJcXUcu/rgm4awHUtu7tkhgJ674Th3HAiEA/Hzqw3qb2l/PpqOlOHDBEJNLDwZ fONQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:from:date:message-id:subject:to :content-type; bh=F4bDLHoraoapetA7qBOVSt999fdQ1DRK8U577UAioHA=; b=R9y+cjTlfOBcoj98zIkNLmnFk1Zitw0i/VL/5gYy3aX9p8NThDyH7ZK1TuO+qaUrmh lbsQplidJf4Pc6ApmDR+tBuj5lPi0erUY/Po8YOdATrXrOn+Kthn7t+w7ly3Jd5DqzMV DuIxXz7NB6psjeERunLtQKlQ0OVmZeAqx3Xw6NLklc1OSgELbxZ6gm4dZXNtUSKo0etL 9OhslMhzI+w0utmVJCC391wsMQHD3CyRO62U1i3feG3i8WLIVc5Nm/kuLLeY84LnAFV3 y7SmYE/71QwkA7F24ZbRHhUKJPLMCIH713LgRMx6JhFB7jYdu2nq2kDFM0WhOgpk4Ysg z/8w== X-Gm-Message-State: AG10YORwBCaly+wEQCPXJwSkBTUuMOhceSt0Hp+vB0Q1MFZ1uRzUKk0MhjKw6fAu65uRVWwkpl3RwViyKu1lBQ== X-Received: by 10.140.97.202 with SMTP id m68mr10421874qge.102.1453558678715; Sat, 23 Jan 2016 06:17:58 -0800 (PST) MIME-Version: 1.0 From: Masoud Moshref Javadi Date: Sat, 23 Jan 2016 14:17:49 +0000 Message-ID: To: users@dpdk.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Subject: [dpdk-users] high jitter in dpdk kni X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 23 Jan 2016 14:17:59 -0000 I see jitter in KNI RTT. I have two servers. I run kni sample application on one, configure its IP and ping an external interface. sudo -E build/kni -c 0xaaaa -n 4 -- -p 0x1 -P --config="(0,3,5)" sudo ifconfig vEth0 192.168.1.2/24 ping 192.168.1.3 This is the ping result: 64 bytes from 192.168.1.2: icmp_seq=5 ttl=64 time=1.93 ms 64 bytes from 192.168.1.2: icmp_seq=6 ttl=64 time=0.907 ms 64 bytes from 192.168.1.2: icmp_seq=7 ttl=64 time=3.15 ms 64 bytes from 192.168.1.2: icmp_seq=8 ttl=64 time=1.96 ms 64 bytes from 192.168.1.2: icmp_seq=9 ttl=64 time=3.95 ms 64 bytes from 192.168.1.2: icmp_seq=10 ttl=64 time=2.90 ms 64 bytes from 192.168.1.2: icmp_seq=11 ttl=64 time=0.933 ms The ping delay between two servers without kni is 0.170ms. I'm using dpdk 2.2. Any thought on how to keep KNI delay predictable? Thanks