From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-00103a01.pphosted.com (mx0b-00103a01.pphosted.com [67.231.152.227]) by dpdk.org (Postfix) with ESMTP id DC5684A63 for ; Fri, 5 Jun 2015 19:06:19 +0200 (CEST) Received: from pps.filterd (m0002317.ppops.net [127.0.0.1]) by mx0b-00103a01.pphosted.com (8.14.5/8.14.5) with SMTP id t55H5KrQ010707 for ; Fri, 5 Jun 2015 13:06:18 -0400 Received: from vawvcgsie2k1301.ciena.com (LIN1-118-36-35.ciena.com [63.118.36.35]) by mx0b-00103a01.pphosted.com with ESMTP id 1utja34g5j-1 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 05 Jun 2015 13:06:18 -0400 Received: from VAWVE2K13MBX01.ciena.com (10.4.156.87) by VAWVCGSIE2K1301.ciena.com (10.4.62.15) with Microsoft SMTP Server (TLS) id 15.0.847.32; Fri, 5 Jun 2015 13:06:17 -0400 Received: from ONWVEXCHHT03.ciena.com (10.128.6.43) by VAWVE2K13MBX01.ciena.com (10.4.156.87) with Microsoft SMTP Server (TLS) id 15.0.847.32; Fri, 5 Jun 2015 13:06:17 -0400 Received: from ONWVEXCHMB01.ciena.com ([10.128.6.18]) by ONWVEXCHHT03.ciena.com ([::1]) with mapi; Fri, 5 Jun 2015 13:06:17 -0400 From: "Yeddula, Avinash" To: "dev@dpdk.org" Date: Fri, 5 Jun 2015 13:06:15 -0400 Thread-Topic: 4 Traffic classes per Pipe limitation Thread-Index: AdCfrtt4Sum93oHARSOGVPPSgMROGg== Message-ID: Accept-Language: en-US, en-CA Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US, en-CA x-tm-as-product-ver: SMEX-10.0.0.1412-7.000.1014-21594.001 x-tm-as-result: No--44.062000-8.000000-31 x-tm-as-user-approved-sender: No x-tm-as-user-blocked-sender: No MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.14.151, 1.0.33, 0.0.0000 definitions=2015-06-05_14:2015-06-05,2015-06-05,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=1 spamscore=1 suspectscore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=7.0.1-1402240000 definitions=main-1506050218 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Subject: [dpdk-dev] 4 Traffic classes per Pipe limitation 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: Fri, 05 Jun 2015 17:06:20 -0000 Hi, This is related to the QOS scheduler functionality provided by dpdk. I see a limit on the number of traffic classes to be 4. I'm exploring the = available options to increase that limit to 8. This is what I found when I researched on this topic. The limitation on number's of TC (and pipes) comes from the number of bits available. Since the QoS code overloads the 32 bit RSS field in the mbuf there isn't enough bits to a lot. But then again if you add lots of pipes or subports the memory footprint gets huge. Any more info or suggestions on increasing the limit to 8 ? Thanks -Avinash