From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by dpdk.org (Postfix) with ESMTP id 6132F7EBB for ; Fri, 20 Apr 2018 12:05:49 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 Apr 2018 03:05:48 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,300,1520924400"; d="scan'208";a="35716794" Received: from irsmsx106.ger.corp.intel.com ([163.33.3.31]) by orsmga006.jf.intel.com with ESMTP; 20 Apr 2018 03:05:47 -0700 Received: from irsmsx102.ger.corp.intel.com ([169.254.2.164]) by IRSMSX106.ger.corp.intel.com ([169.254.8.37]) with mapi id 14.03.0319.002; Fri, 20 Apr 2018 11:05:46 +0100 From: "Ananyev, Konstantin" To: Shailja Pandey , "Wiles, Keith" CC: "dev@dpdk.org" Thread-Topic: [dpdk-dev] Why packet replication is more efficient when done using memcpy( ) as compared to rte_mbuf_refcnt_update() function? Thread-Index: AQHT1zSK3Y9ecbvBU0S7GHWTo0gpwKQGyS0AgAFNewCAAVju4A== Date: Fri, 20 Apr 2018 10:05:45 +0000 Message-ID: <2601191342CEEE43887BDE71AB977258AE9189DB@IRSMSX102.ger.corp.intel.com> References: <598ada8c-194d-e07e-6121-5dc74cf208a1@iitd.ac.in> <611770bb-d0c9-7f4e-9c3d-3b572c9e8023@iitd.ac.in> In-Reply-To: <611770bb-d0c9-7f4e-9c3d-3b572c9e8023@iitd.ac.in> Accept-Language: en-IE, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-titus-metadata-40: eyJDYXRlZ29yeUxhYmVscyI6IiIsIk1ldGFkYXRhIjp7Im5zIjoiaHR0cDpcL1wvd3d3LnRpdHVzLmNvbVwvbnNcL0ludGVsMyIsImlkIjoiYmJlZGNkYzItMjY5OC00ZTZhLTk0OWQtM2EzZDQ2OGFiOGM1IiwicHJvcHMiOlt7Im4iOiJDVFBDbGFzc2lmaWNhdGlvbiIsInZhbHMiOlt7InZhbHVlIjoiQ1RQX05UIn1dfV19LCJTdWJqZWN0TGFiZWxzIjpbXSwiVE1DVmVyc2lvbiI6IjE2LjUuOS4zIiwiVHJ1c3RlZExhYmVsSGFzaCI6InZPSnQ0ak4rWVd5KzloZ1FNMElIakdLb1FkVHdQZXlsV2N1R2lpTE9xMVU9In0= x-ctpclassification: CTP_NT dlp-product: dlpe-windows dlp-version: 11.0.200.100 dlp-reaction: no-action x-originating-ip: [163.33.239.181] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Subject: Re: [dpdk-dev] Why packet replication is more efficient when done using memcpy( ) as compared to rte_mbuf_refcnt_update() function? X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Apr 2018 10:05:50 -0000 DQoNCj4gLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0NCj4gRnJvbTogZGV2IFttYWlsdG86ZGV2 LWJvdW5jZXNAZHBkay5vcmddIE9uIEJlaGFsZiBPZiBTaGFpbGphIFBhbmRleQ0KPiBTZW50OiBU aHVyc2RheSwgQXByaWwgMTksIDIwMTggMzozMCBQTQ0KPiBUbzogV2lsZXMsIEtlaXRoIDxrZWl0 aC53aWxlc0BpbnRlbC5jb20+DQo+IENjOiBkZXZAZHBkay5vcmcNCj4gU3ViamVjdDogUmU6IFtk cGRrLWRldl0gV2h5IHBhY2tldCByZXBsaWNhdGlvbiBpcyBtb3JlIGVmZmljaWVudCB3aGVuIGRv bmUgdXNpbmcgbWVtY3B5KCApIGFzIGNvbXBhcmVkIHRvIHJ0ZV9tYnVmX3JlZmNudF91cGRhdGUo KQ0KPiBmdW5jdGlvbj8NCj4gDQo+ID4gVGhlIHR3byBjb2RlIGZyYWdtZW50cyBhcmUgZG9pbmcg dHdvIGRpZmZlcmVudCB3YXlzIHRoZSBmaXJzdCBpcyB1c2luZyBhIGxvb3AgdG8gY3JlYXRlIHBv c3NpYmxlIG1vcmUgdGhlbiBvbmUgcmVwbGljYXRpb24gYW5kIHRoZSBzZWNvbmQNCj4gb25lIGlz IG5vdCwgY29ycmVjdD8gVGhlIGxvb3AgY2FuIGNhdXNlIHBlcmZvcm1hbmNlIGhpdHMsIGJ1dCBz aG91bGQgYmUgc21hbGwuDQo+IFNvcnJ5IGZvciB0aGUgY29uZnVzaW9uLCBmb3IgbWVtY3B5IHZl cnNpb24gYWxzbyB3ZSBhcmUgdXNpbmcgYSBsb29wDQo+IG91dHNpZGUgb2YgdGhpcyBmdW5jdGlv bi4gRXNzZW50aWFsbHksIHdlIGFyZSBtYWtpbmcgc2FtZSBudW1iZXIgb2YNCj4gY29waWVzIGlu IGJvdGggdGhlIGNhc2VzLg0KPiA+IFRoZSBmaXJzdCBvbmUgaXMgdXNpbmcgdGhlIGhkci0+bmV4 dCBwb2ludGVyIHdoaWNoIGlzIGluIHRoZSBzZWNvbmQgY2FjaGVsaW5lIG9mIHRoZSBtYnVmIGhl YWRlciwgdGhpcyBjYW4gYW5kIHdpbGwgY2F1c2UgYSBjYWNoZWxpbmUgbWlzcw0KPiBhbmQgZGVn cmFkZSB5b3VyIHBlcmZvcm1hbmNlLiBUaGUgc2Vjb25kIGNvZGUgZG9lcyBub3QgdG91Y2ggaGRy LT5uZXh0IGFuZCB3aWxsIG5vdCBjYXVzZSBhIGNhY2hlbGluZSBtaXNzLiBXaGVuIHRoZSBwYWNr ZXQgZ29lcw0KPiBiZXlvbmQgNjRieXRlcyB0aGVuIHlvdSBoaXQgdGhlIHNlY29uZCBjYWNoZWxp bmUsIGFyZSB5b3Ugc3RhcnRpbmcgdG8gc2VlIHRoZSBwcm9ibGVtIGhlcmUuDQo+IFdlIGFsc28g cGVyZm9ybWVkIHNhbWUgZXhwZXJpbWVudCBmb3IgZGlmZmVyZW50IHBhY2tldCBzaXplcyg2NEIs IDEyOEIsDQo+IDI1NkIsIDUxMkIsIDEwMjRCLCAxNTE4QiksIHRoZSBzaGFycCBkcm9wIGluIHRo cm91Z2hwdXQgaXMgb2JzZXJ2ZWQgb25seQ0KPiB3aGVuIHRoZSBwYWNrZXQgc2l6ZSBpbmNyZWFz ZXMgZnJvbSA2NEIgdG8gMTI4QiBhbmQgbm90IGFmdGVyIHRoYXQuIFNvLA0KPiBjYWNoZWxpbmUg bWlzcyBzaG91bGQgaGFwcGVuIGZvciBvdGhlciBwYWNrZXQgc2l6ZXMgYWxzby4gSSBhbSBub3Qg c3VyZQ0KPiB3aHkgdGhpcyBpcyB0aGUgY2FzZS4gV2h5IHRoZSBkcm9wIGlzIG5vdCBzaGFycCBh ZnRlciAxMjggQiBwYWNrZXRzIHdoZW4NCj4gcmVwbGljYXRlZCB1c2luZyBydGVfcGt0bWJ1Zl9y ZWZjbnRfdXBkYXRlKCkuDQo+IA0KPiA+ICAgRXZlcnkgdGltZSB5b3UgdG91Y2ggYSBuZXcgY2Fj aGUgbGluZSBwZXJmb3JtYW5jZSB3aWxsIGRyb3AgdW5sZXNzIHRoZSBjYWNoZWxpbmUgaXMgcHJl ZmV0Y2hlZCBpbnRvIG1lbW9yeSBmaXJzdCwgYnV0IGluIHRoaXMgY2FzZSBpdA0KPiByZWFsbHkg Y2FuIG5vdCBiZSBkb25lIGVhc2lseS4gQ291bnQgdGhlIGNhY2hlbGluZXMgeW91IGFyZSB0b3Vj aGluZyBhbmQgbWFrZSBzdXJlIHRoZXkgYXJlIHRoZSBzYW1lIG51bWJlciBpbiBlYWNoIGNhc2Uu DQo+IEkgZG9uJ3QgdW5kZXJzdGFuZCB0aGUgY29tcGxleGl0eSBoZXJlLCBjb3VsZCB5b3UgcGxl YXNlIGV4cGxhaW4gaXQgaW4NCj4gZGV0YWlsLg0KPiA+DQo+ID4gV2h5IGRpZCB5b3UgdXNlIG1l bWNweSBhbmQgbm90IHJ0ZV9tZW1jcHkgaGVyZSBhcyBydGVfbWVtY3B5IHNob3VsZCBiZSBmYXN0 ZXI/DQo+ID4NCj4gPiBJIGJlbGlldmUgbm93IERQREsgaGFzIGEgcnRlX3BrdG1idWZfYWxsb2Nf YnVsaygpIGZ1bmN0aW9uIHRvIHJlZHVjZSB0aGUgbnVtYmVyIG9mIHJ0ZV9wa3RtYnVmX2FsbG9j KCkgY2FsbHMsIHdoaWNoIHNob3VsZCBoZWxwIGlmIHlvdQ0KPiBrbm93IHRoZSBudW1iZXIgb2Yg cGFja2V0cyB5b3UgbmVlZCB0byByZXBsaWNhdGUgdXAgZnJvbnQuDQo+IFdlIGFyZSBhbHJlYWR5 IHVzaW5nIGJvdGggb2YgdGhlc2UgZnVuY3Rpb25zLCBqdXN0IHRvIHNpbXBsaWZ5IHRoZQ0KPiBw c2V1ZG8tY29kZSBJIHVzZWQgbWVtY3B5IGFuZCBydGVfcGt0bWJ1Zl9hbGxvYygpLg0KPiANCj4g IyBwa3RzeiAxKDY0IGJ5dGVzKcKgwqDCoCB8IMKgIHBrdHN6IDIoMTI4IGJ5dGVzKcKgwqDCoMKg IHzCoCBwa3RzeiAzKDI1Ng0KPiBieXRlcynCoMKgwqAgfMKgIHBrdHN6IDQoNTEyIGJ5dGVzKcKg wqAgfCBwa3RzeiA0KDEwMjQgYnl0ZXMpwqDCoMKgIHwNCj4gIyBtZW1jcHnCoMKgwqAgcmVmY250 wqDCoMKgIHwgwqAgbWVtY3B5wqDCoMKgIHJlZmNudMKgwqDCoCDCoCB8IG1lbWNweSByZWZjbnTC oMKgwqAgwqDCoCB8DQo+IG1lbWNwecKgIHJlZmNudMKgwqDCoCDCoMKgIHwgbWVtY3B5wqDCoCBy ZWZjbnQgwqDCoMKgIMKgwqDCoCB8DQo+ICDCoMKgIDU5NDk4ODjCoMKgwqAgNTgwNjcyMHwgwqAg NTgzMTM2MMKgwqDCoCAyODkwODE2wqAgfMKgIDU2NDAzNznCoMKgwqAgMjg4NjAxNiB8DQo+IDUx MDc4NDDCoMKgIDI4NjMyNjTCoCB8IDQ1MTAxMjHCoMKgIDI2OTI4NzbCoMKgwqAgfA0KPiANCj4g VGhyb3VnaHB1dCBpcyBpbiBNUFBTLg0KPiANCg0KV29uZGVyIHdoYXQgTklDIGFuZCBUWCBmdW5j dGlvbiBkbyB5b3UgdXNlPw0KQW55IGNoYW5jZSB0aGF0IG11bHRpLXNlZyBzdXBwb3J0IGlzIG5v dCBvbj8NCktvbnN0YW50aW4NCg==