From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from jaguar.aricent.com (jaguar.aricent.com [180.151.2.24]) by dpdk.org (Postfix) with ESMTP id 7A2FE3B5 for ; Tue, 7 Oct 2014 05:22:06 +0200 (CEST) Received: from jaguar.aricent.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id AE44A2189C8 for ; Tue, 7 Oct 2014 08:59:13 +0530 (IST) Received: from GUREXHT02.ASIAN.AD.ARICENT.COM (unknown [10.203.171.138]) by jaguar.aricent.com (Postfix) with ESMTPS id 97B63218972 for ; Tue, 7 Oct 2014 08:59:13 +0530 (IST) Received: from GUREXMB01.asian.ad.aricent.com ([10.203.171.132]) by GUREXHT02.ASIAN.AD.ARICENT.COM ([10.203.171.138]) with mapi; Tue, 7 Oct 2014 08:59:11 +0530 From: Ravi Kumar Iyer To: "dev@dpdk.org" Date: Tue, 7 Oct 2014 08:59:10 +0530 Thread-Topic: Queries related to Hyperthreading Thread-Index: AQHP4d7bTwtgqh2uckSVy5a9owetGQ== Message-ID: <5E927AAF66A09F419D11E0CDC6794A367EF8AD85AB@GUREXMB01.ASIAN.AD.ARICENT.COM> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-TM-AS-MML: disable Subject: [dpdk-dev] Queries related to Hyperthreading 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: Tue, 07 Oct 2014 03:22:07 -0000 hello Intel Gurus, I have some queries related to intel HT technology. I am running an intel d= pdk application and trying to benchmark as well as optimize the same. As o= f now it is a single threaded application and would like to keep it like th= at for now. I am running it on an intel sandy bridge arch processor with HT= on. Now to increase the performance I have disabled HT, but am still getti= ng the same performance[ just a marginal improvement]. Now as per our under= standing so far wrt HT, two Hardware threads share the same physical core. = Now if we switch off HT[from bios] shouldn't just one hardware Thread get h= old of the complete CPU core. The application is heavily compute oriented = and as such minimal memory access or any IO operations. Appreciate any insi= ght on this. thanks ravi "DISCLAIMER: This message is proprietary to Aricent and is intended solely = for the use of the individual to whom it is addressed. It may contain privi= leged or confidential information and should not be circulated or used for = any purpose other than for what it is intended. If you have received this m= essage in error, please notify the originator immediately. If you are not t= he intended recipient, you are notified that you are strictly prohibited fr= om using, copying, altering, or disclosing the contents of this message. Ar= icent accepts no responsibility for loss or damage arising from the use of = the information transmitted by this email including damage from virus."