From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7C9FDC432C3 for ; Thu, 28 Nov 2019 16:25:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 57EF3217BA for ; Thu, 28 Nov 2019 16:25:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726747AbfK1QZE (ORCPT ); Thu, 28 Nov 2019 11:25:04 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:38422 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726446AbfK1QZE (ORCPT ); Thu, 28 Nov 2019 11:25:04 -0500 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-234-9BIOC5miNL-BUa2iQ7QnXA-1; Thu, 28 Nov 2019 16:25:01 +0000 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Thu, 28 Nov 2019 16:25:00 +0000 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Thu, 28 Nov 2019 16:25:00 +0000 From: David Laight To: 'Willem de Bruijn' CC: Jesper Dangaard Brouer , Marek Majkowski , linux-kernel , "network dev" , kernel-team , Paolo Abeni Subject: RE: epoll_wait() performance Thread-Topic: epoll_wait() performance Thread-Index: AdWgk3jgEIFNwcnRS6+4A+/jFPxTuQEdLCCAAAAn2qAADFPagAAAV68AAAgIvgAAHmS7QA== Date: Thu, 28 Nov 2019 16:25:00 +0000 Message-ID: References: <5f4028c48a1a4673bd3b38728e8ade07@AcuMS.aculab.com> <20191127164821.1c41deff@carbon> <5eecf41c7e124d7dbc0ab363d94b7d13@AcuMS.aculab.com> In-Reply-To: Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 X-MC-Unique: 9BIOC5miNL-BUa2iQ7QnXA-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org RnJvbTogV2lsbGVtIGRlIEJydWlqbg0KPiBTZW50OiAyNyBOb3ZlbWJlciAyMDE5IDE5OjQ4DQou Li4NCj4gQXJlIHRoZSBsYXRlc3QgbnVtYmVycyB3aXRoIENPTkZJR19IQVJERU5FRF9VU0VSQ09Q WT8NCg0KQWNjb3JkaW5nIHRvIC9ib290L2NvbmZpZy1gdW5hbWUgLXJgIGl0IGlzIGVuYWJsZWQg b24gbXkgc3lzdGVtLg0KSSBzdXNwZWN0IGl0IGhhcyBhIG1lYXN1cmFibGUgZWZmZWN0IG9uIHRo ZXNlIHRlc3RzLg0KDQo+IEkgYXNzdW1lIHRoYXQgdGhlIHBvbGwoKSBhZnRlciByZWN2KCkgaXMg bm9uLWJsb2NraW5nLiBJZiB1c2luZw0KPiByZWN2bXNnLCB0aGF0IGV4dHJhIHN5c2NhbGwgY291 bGQgYmUgYXZvaWRlZCBieSBpbXBsZW1lbnRpbmcgYSBjbXNnDQo+IGlucSBoaW50IGZvciB1ZHAg c29ja2V0cyBhbmFsb2dvdXMgdG8gVENQX0NNX0lOUS90Y3BfaW5xX2hpbnQuDQoNCkFsbCB0aGUg cG9sbCgpIGNhbGxzIGFyZSBub24tYmxvY2tpbmcuDQpUaGUgZmlyc3QgcG9sbCgpIGhhcyBhbGwg dGhlIHNvY2tldHMgaW4gaXQuDQpUaGUgc2Vjb25kIHBvbGwoKSBvbmx5IHRob3NlIHRoYXQgcmV0 dXJuZWQgZGF0YSB0aGUgZmlyc3QgdGltZSBhcm91bmQuDQpUaGUgY29kZSB0aGVuIHNsZWVwcyBl bHNld2hlcmUgZm9yIHRoZSByZXN0IG9mIHRoZSAxMG1zIGludGVydmFsLg0KKEFjdHVhbGx5IHRo ZSBwb2xscyBhcmUgZG9uZSBpbiBibG9ja3Mgb2YgNjQsIGZpbGxpbmcgdXAgdGhlIHBmZFtdIGVh Y2ggdGltZS4pDQoNClRoaXMgYXZvaWRzIHRoZSBwcm9ibGVtIG9mIHJlcGVhdGVkbHkgc2V0dGlu ZyB1cCBhbmQgdGVhcmluZyBkb3duIHRoZQ0KcGVyLWZkIGRhdGEgZm9yIHBvbGwoKS4NCg0KPiBN b3JlIG91dGxhbmRpc2ggd291bGQgYmUgdG8gYWJ1c2UgdGhlIG1tc2doZHItPm1zZ19sZW4gZmll bGQgdG8gcGFzcw0KPiBmaWxlIGRlc2NyaXB0b3JzIGFuZCBhbW9ydGl6ZSB0aGUga2VybmVsIHBh Z2UtdGFibGUgaXNvbGF0aW9uIGNvc3QNCj4gYWNyb3NzIHNvY2tldHMuIEJsb2NraW5nIHNlbWFu dGljcyB3b3VsZCBiZSB3ZWlyZCwgZm9yIHN0YXJ0ZXJzLg0KDQpJdCB3b3VsZCBiZSBiZXR0ZXIg dG8gYWxsb3cgYSBzaW5nbGUgVURQIHNvY2tldCBiZSBib3VuZCB0byBtdWx0aXBsZSBwb3J0cy4N CkFuZCB0aGVuIHVzZSB0aGUgY21zZyBkYXRhIHRvIHNvcnQgb3V0IHRoZSBhY3R1YWwgZGVzdGlu YXRpb24gcG9ydC4NCg0KCURhdmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwg QnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVn aXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykNCg==