From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-x22e.google.com (mail-pd0-x22e.google.com [IPv6:2607:f8b0:400e:c02::22e]) by dpdk.org (Postfix) with ESMTP id 5BB42DE0 for ; Thu, 9 Jan 2014 20:27:09 +0100 (CET) Received: by mail-pd0-f174.google.com with SMTP id x10so3526691pdj.5 for ; Thu, 09 Jan 2014 11:28:21 -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:cc:content-type; bh=D9gV+hRJMTQrA1n3ZfC8Y44wmWUmdBCAexr3SohdPWo=; b=vrQ5LQRw5WTyamolc6VpEUtLl7DslOpdX6om46IjO+sI0hyOsbauNI0EjUT1PGkyNe CEypnp/WZ0FfebI27O/+m/ubk31Qj3279I+c3ETnMXNDwB+uyRixjhT+iljkFLtLxvhX Kq1b5pRMm/uNvAonmbEi4kRAI85CGImbS11bWTHDgZ8esZOKAtXwHtJCtbfrYXX4e+Sg 9FV6i2/DfXlU19tvzFX6tvok3YaLOVv7wnFvemLmErsbi723qCZKiS7MNW2b4Gci+wjp +qEHHJdHXsz4xoL9ehxmzbtnAdf+Ue8b/NfNmG3CRppREb+e8eSkeooiW8TGLgvpl95W UYcQ== X-Received: by 10.66.25.165 with SMTP id d5mr5779748pag.24.1389295701401; Thu, 09 Jan 2014 11:28:21 -0800 (PST) MIME-Version: 1.0 Received: by 10.70.131.225 with HTTP; Thu, 9 Jan 2014 11:28:00 -0800 (PST) From: Michael Quicquaro Date: Thu, 9 Jan 2014 14:28:00 -0500 Message-ID: To: "dev@dpdk.org" Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Cc: mayhan@mayhan.org Subject: [dpdk-dev] Rx-errors with testpmd (only 75% line rate) 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, 09 Jan 2014 19:27:09 -0000 Hello, My hardware is a Dell PowerEdge R820: 4x Intel Xeon E5-4620 2.20GHz 8 core 16GB RDIMM 1333 MHz Dual Rank, x4 - Quantity 16 Intel X520 DP 10Gb DA/SFP+ So in summary 32 cores @ 2.20GHz and 256GB RAM ... plenty of horsepower. I've reserved 16 1GB Hugepages I am configuring only one interface and using testpmd in rx_only mode to first see if I can receive at line rate. I am generating traffic on a different system which is running the netmap pkt-gen program - generating 64 byte packets at close to line rate. I am only able to receive approx. 75% of line rate and I see the Rx-errors in the port stats going up proportionally. I have verified that all receive queues are being used, but strangely enough, it doesn't matter how many queues more than 2 that I use, the throughput is the same. I have verified with 'mpstat -P ALL' that all specified cores are used. The utilization of each core is only roughly 25%. Here is my command line: testpmd -c 0xffffffff -n 4 -- --nb-ports=1 --coremask=0xfffffffe --nb-cores=8 --rxd=2048 --txd=2048 --mbcache=512 --burst=512 --rxq=8 --txq=8 --interactive What can I do to trace down this problem? It seems very similar to a thread on this list back in May titled "Best example for showing throughput?" where no resolution was ever mentioned in the thread. Thanks for any help. - Michael