From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi0-f47.google.com (mail-oi0-f47.google.com [209.85.218.47]) by dpdk.org (Postfix) with ESMTP id 391443208 for ; Tue, 26 Apr 2016 06:02:32 +0200 (CEST) Received: by mail-oi0-f47.google.com with SMTP id r78so2957815oie.0 for ; Mon, 25 Apr 2016 21:02:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to; bh=q9x1LlZK91UVX9vjkEC8am69LIfd2qJx/ukGmn/YZCo=; b=pq+MrYqswdXpuy16SPgnYtdLOryuBjnyEWD6pFCmWkwl9fsNOBZm1cBogjArkJ4NBz zBLC57QfJYMcprv5ceCvQDJzKs5HUb08RiVmJa9omoov2BVm0u7yWgOWLgYEP74nf4OQ DhgnvxqrAGraKBwBmZyuPXEdLJ3nSD9S+wGzYkvnj4xaX/iFVLANS8rfpNO2wXkaK61y iUjf+3NcnC5Fh2G710nltSwP6bffhEaFP6RgqQHiOLDKQWTq5SOyTdERRD6YyI1gMU8D BvqSf8USGqiBBkQMJ7la88RCI0pHNsYO7TeTJC/qHjXOG6rOpmqeqxWf+sut9u132tWh jn3g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=q9x1LlZK91UVX9vjkEC8am69LIfd2qJx/ukGmn/YZCo=; b=ElmhipUU3M5/SY8jFf948OyRq+MH5d1uGU+gPjI/+wmX6OdssgzKdy2ZRthqvbbVqf +iQ/c7MoRlz+oeyPFX3JwSItjNYJ0hjkZKBQBPFYkh5sc6ZK+oJaQddJHDS8r+4+M70R jxDEyBV5GMX6Mv5DY6OXLlgnMeMn359pjXIY8zk0uQKh/foyp8nWZcUAMp9EnbwYWags +aieM80lXORbyGLF9mEtJHjGV/JbIAbhk54waPNFx2C2qmWXefC9EymbPtzJzJJKlQ9+ UoGgf/jQfcI3x8NMKjkGkF4akoNWECLvtzNDYrvWF/bxmsytsD5Mwp9zHcwTK64AXTkE fLog== X-Gm-Message-State: AOPr4FVrJTqTqcHlFfz5Dy1EpLDaLySTPL198fQjA/Au0vRWkRggAe/0VyHwTA9nygHeNh6RXkGUSH47+KNzew== MIME-Version: 1.0 X-Received: by 10.157.9.247 with SMTP id 52mr144256otz.126.1461643351686; Mon, 25 Apr 2016 21:02:31 -0700 (PDT) Received: by 10.202.44.79 with HTTP; Mon, 25 Apr 2016 21:02:31 -0700 (PDT) Date: Tue, 26 Apr 2016 00:02:31 -0400 Message-ID: From: Ashok Padhy To: users@dpdk.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Subject: [dpdk-users] DPDK QOS scheduler priority starvation issue 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: Tue, 26 Apr 2016 04:02:32 -0000 Hello Cristian, We are running into an issue in our DPDK scheduler issue we notice that lower priority traffic (TC3) starves higher priority traffic if the packet size of the lower priority traffic is smaller than the packet size of the higher priority traffic. If the packet size of the lower priority traffic (TC3) is same or larger than the higher priority (TC1 or TC2), we dont see the problem. Using q-index within the TC: -Q0 (TC1), 1024 byte packets, 40m configured and 100m sent -Q2 (TC3), 128/256 byte packets, 400m configured and 500m sent -Only one pipe active ( configured for 400m) -Only on subport configured. -TC period is set to 10msecs In this scenario TC3 carries most of the traffic (400m). We are using older version of DPDK, is this something addressed in the later releases? Appreciate any hint, thanks Ashok