From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 611DDA0A02; Thu, 25 Mar 2021 14:56:31 +0100 (CET) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 4832B4067B; Thu, 25 Mar 2021 14:56:31 +0100 (CET) Received: from mail-yb1-f181.google.com (mail-yb1-f181.google.com [209.85.219.181]) by mails.dpdk.org (Postfix) with ESMTP id 785504014F for ; Wed, 24 Mar 2021 10:05:06 +0100 (CET) Received: by mail-yb1-f181.google.com with SMTP id a143so13340600ybg.7 for ; Wed, 24 Mar 2021 02:05:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=L41CaWTsmlZ3YMT4RYso2MvJ3JVJaL9aLfAEbF55qCU=; b=muaBxVWy4yZOC8D45nn3FJ21E07L2ls2JQZTSCy6xrTkMnohsfoZG2m/EpEDBDH1YY wE2SLRnaVCl6WvrL8nX4FRGRPsp5B9dR/yMD0+9dLnzXgrpnuQgxCHhhs4FQuduTeSrI GOQ4nn4JamXnsnwq3/AnY6PSzdqsSbjf0vHaG6JoMahMvlb6c4RqE2YvGqm/1Qde1UAv w0r9Ujn4gG33M+IQzzJ9U54wdM8hQ65+U9dSZpXimK3pwF7k6qnC16jg01WqfhYUFSA+ Hc4MAUNwJfPxZs1lbw3t76B1AHuFgD0qKhxwhY85GnfocQbgyBCSj+lSdUe8PYsMGpE3 Eexg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=L41CaWTsmlZ3YMT4RYso2MvJ3JVJaL9aLfAEbF55qCU=; b=fR2p6L6DtadIvGPkw250abe6yB+ON6vFbpLhnsInmUkOTTIbWlbW+xLr/jkzaLPDTy v+2nvxUqVjj1l6m6uhQRDnK5APbA4Hs3+dndiigKlnF2YA5kshdt7QgJ59teJZTUtHgT PXoen/Ye/SSr05Cp7ZX+1lXIr2829oEN39AIxIM8MEsqw5dD+XCJQiQX07HFGzLbpZIB zGVilnfdbKHn+ykPAYw//F/Fd0JLkhHQr+x1Htkq5XqVBfE1ocazMEsw63KsMazoqmP8 e5N3cyBe0K/F4FvnpYK7aAMm2yJuwTQ1sBv1s6rWjR/ptMtfi6zKMQ3U3BFUej9nMX9k TiKw== X-Gm-Message-State: AOAM530RkrGpPpgEAM0y3uN0lRVq5KWrMF3BzA89sgJU8bTnH4jeSY0q lVOgFsTpObeGWJNpTUq0DfT5rRnP0IMbdV71yhYnnf+5 X-Google-Smtp-Source: ABdhPJzCJGa/+BAL3+8I7hdzT1KSYC8g19UFOHp/qcEa84DGC9y252L9RWFyBPnS/VHtpMw3w9nKxmPyjkdJiQ9sYFs= X-Received: by 2002:a25:c0ca:: with SMTP id c193mr3447174ybf.74.1616576705504; Wed, 24 Mar 2021 02:05:05 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Rajesh R Date: Wed, 24 Mar 2021 14:34:52 +0530 Message-ID: To: dev@dpdk.org X-Mailman-Approved-At: Thu, 25 Mar 2021 14:56:29 +0100 Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.29 Subject: [dpdk-dev] DPDKthe packet capture performance increases steeply between 11 Rx queues and 12 Rx queues. Any idea why? X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Hi, We are experimenting with testpmd packet generation and capture at 100 Gbps on two machines back to back. We are observing a peculiar behaviour that the packet capture performance increases steeply between 11 Rx queues and 12 Rx queues. Any idea why? The details of the setup are given below: DPDK version: *19.11* NIC: *Mellanox ConnectX-5 100 GbE * OS: *RHEL 8.2(kernel *4.18.0-193) Application: *Testpmd(txonly on generation side and rxonly on capture side)* *It is observed that *capture rate increases almost gradually upto* 11 Rx queues and then increases steeply *to reach line rate *at 12 queues. The maximum capture rate with 11 Rx queues is around 80 Gbps and with 12 Rx queues is 99. Gbps.* *Is it something to do with DPDK ? Or Mellanox specific?* -- Regards Rajesh R