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[209.132.180.67]) by mx.google.com with ESMTP id s20si187122ejd.77.2019.11.28.02.19.02; Thu, 28 Nov 2019 02:19:26 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726653AbfK1KRj (ORCPT + 99 others); Thu, 28 Nov 2019 05:17:39 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([146.101.78.151]:60734 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726133AbfK1KRi (ORCPT ); Thu, 28 Nov 2019 05:17:38 -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-31-hUuKyJzuN2qaJR0SWDF11g-1; Thu, 28 Nov 2019 10:17:35 +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 10:17:34 +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 10:17:34 +0000 From: David Laight To: 'Eric Dumazet' , 'Paolo Abeni' , Jesper Dangaard Brouer CC: 'Marek Majkowski' , linux-kernel , network dev , kernel-team Subject: RE: epoll_wait() performance Thread-Topic: epoll_wait() performance Thread-Index: AdWgk3jgEIFNwcnRS6+4A+/jFPxTuQEdLCCAAAAn2qAADa2dEAAA53BgAAHhYYAAIluz0A== Date: Thu, 28 Nov 2019 10:17:34 +0000 Message-ID: <1265e30d04484d08b86ba2abef5f5822@AcuMS.aculab.com> References: <5f4028c48a1a4673bd3b38728e8ade07@AcuMS.aculab.com> <20191127164821.1c41deff@carbon> <0b8d7447e129539aec559fa797c07047f5a6a1b2.camel@redhat.com> <2f1635d9300a4bec8a0422e9e9518751@AcuMS.aculab.com> <313204cf-69fd-ec28-a22c-61526f1dea8b@gmail.com> In-Reply-To: <313204cf-69fd-ec28-a22c-61526f1dea8b@gmail.com> 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: hUuKyJzuN2qaJR0SWDF11g-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogRXJpYyBEdW1hemV0DQo+IFNlbnQ6IDI3IE5vdmVtYmVyIDIwMTkgMTc6NDcNCi4uLg0K PiBBIFFVSUMgc2VydmVyIGhhbmRsZXMgaHVuZHJlZCBvZiB0aG91c2FuZHMgb2YgJyBVRFAgZmxv d3MnIGFsbCB1c2luZyBvbmx5IG9uZSBVRFAgc29ja2V0DQo+IHBlciBjcHUuDQo+IA0KPiBUaGlz IGlzIHJlYWxseSB0aGUgb25seSB3YXkgdG8gc2NhbGUsIGFuZCBkb2VzIG5vdCBuZWVkIGtlcm5l bCBjaGFuZ2VzIHRvIGVmZmljaWVudGx5DQo+IG9yZ2FuaXplIG1pbGxpb25zIG9mIFVEUCBzb2Nr ZXRzIChodWdlIG1lbW9yeSBmb290cHJpbnQgZXZlbiBpZiB3ZSBnZXQgcmlnaHQgaG93DQo+IHdl IG1hbmFnZSB0aGVtKQ0KPiANCj4gR2l2ZW4gdGhhdCBVRFAgaGFzIG5vIHN0YXRlLCB0aGVyZSBp cyByZWFsbHkgbm8gcG9pbnQgdHJ5aW5nIHRvIGhhdmUgb25lIFVEUA0KPiBzb2NrZXQgcGVyIGZs b3csIGFuZCBoYXZpbmcgdG8gZGVhbCB3aXRoIGVwb2xsKCkvcG9sbCgpIG92ZXJoZWFkLg0KDQpI b3cgY2FuIHlvdSBkbyB0aGF0IHdoZW4gYWxsIHRoZSBVRFAgZmxvd3MgaGF2ZSBkaWZmZXJlbnQg ZGVzdGluYXRpb24gcG9ydCBudW1iZXJzPw0KVGhlc2UgYXJlIG1lc3NhZ2UgZmxvd3Mgbm90IGlk ZW1wb3RlbnQgcmVxdWVzdHMuDQpJIGRvbid0IHJlYWxseSB3YW50IHRvIGNvbGxlY3QgdGhlIHBh Y2tldHMgYmVmb3JlIHRoZXkndmUgYmVlbiBwcm9jZXNzZWQgYnkgSVAuDQoNCkkgY291bGQgd3Jp dGUgYSBkcml2ZXIgdGhhdCB1c2VzIGtlcm5lbCB1ZHAgc29ja2V0cyB0byBnZW5lcmF0ZSBhIHNp bmdsZSBtZXNzYWdlIHF1ZXVlDQp0aGFuIGNhbiBiZSBlZmZpY2llbnRseSBwcm9jZXNzZWQgZnJv bSB1c2Vyc3BhY2UgLSBidXQgaXQgaXMgYSBmYWZmIGNvbXBpbGluZyBpdCBmb3INCnRoZSBzeXN0 ZW1zIGtlcm5lbCB2ZXJzaW9uLg0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExh a2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQs IFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYgKFdhbGVzKQ0K