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=-3.8 required=3.0 tests=BAYES_00, 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 B18F6C433E3 for ; Wed, 24 Mar 2021 16:39:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 984F361A0F for ; Wed, 24 Mar 2021 16:39:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236446AbhCXQjA (ORCPT ); Wed, 24 Mar 2021 12:39:00 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.86.151]:20052 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235892AbhCXQif (ORCPT ); Wed, 24 Mar 2021 12:38:35 -0400 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-273-ieJ6ILjUMhinNlWCciDQvA-1; Wed, 24 Mar 2021 16:38:31 +0000 X-MC-Unique: ieJ6ILjUMhinNlWCciDQvA-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) by AcuMS.aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 24 Mar 2021 16:38:31 +0000 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.012; Wed, 24 Mar 2021 16:38:31 +0000 From: David Laight To: 'Robin Murphy' , Yang Yingliang , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" CC: "catalin.marinas@arm.com" , "will@kernel.org" , "guohanjun@huawei.com" Subject: RE: [PATCH 2/3] arm64: lib: improve copy performance when size is ge 128 bytes Thread-Topic: [PATCH 2/3] arm64: lib: improve copy performance when size is ge 128 bytes Thread-Index: AQHXH915IdtKoxR55UKYkN65PW6keqqTVkuA Date: Wed, 24 Mar 2021 16:38:31 +0000 Message-ID: <62602598e7b742d09c581f3fc988e487@AcuMS.aculab.com> References: <20210323073432.3422227-1-yangyingliang@huawei.com> <20210323073432.3422227-3-yangyingliang@huawei.com> <03ac41af-c433-cd66-8195-afbf9c49554c@arm.com> In-Reply-To: <03ac41af-c433-cd66-8195-afbf9c49554c@arm.com> Accept-Language: en-GB, 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 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogUm9iaW4gTXVycGh5DQo+IFNlbnQ6IDIzIE1hcmNoIDIwMjEgMTI6MDkNCj4gDQo+IE9u IDIwMjEtMDMtMjMgMDc6MzQsIFlhbmcgWWluZ2xpYW5nIHdyb3RlOg0KPiA+IFdoZW4gY29weSBv dmVyIDEyOCBieXRlcywgc3JjL2RzdCBpcyBhZGRlZCBhZnRlcg0KPiA+IGVhY2ggbGRwL3N0cCBp bnN0cnVjdGlvbiwgaXQgd2lsbCBjb3N0IG1vcmUgdGltZS4NCj4gPiBUbyBpbXByb3ZlIHRoaXMs IHdlIG9ubHkgYWRkIHNyYy9kc3QgYWZ0ZXIgbG9hZA0KPiA+IG9yIHN0b3JlIDY0IGJ5dGVzLg0K PiANCj4gVGhpcyBicmVha3MgdGhlIHJlcXVpcmVkIGJlaGF2aW91ciBmb3IgY29weV8qX3VzZXIo KSwgc2luY2UgdGhlIGZhdWx0DQo+IGhhbmRsZXIgZXhwZWN0cyB0aGUgYmFzZSBhZGRyZXNzIHRv IGJlIHVwLXRvLWRhdGUgYXQgYWxsIHRpbWVzLiBTYXkNCj4geW91J3JlIGNvcHlpbmcgMTI4IGJ5 dGVzIGFuZCBmYXVsdCBvbiB0aGUgNHRoIHN0b3JlLCBpdCBzaG91bGQgcmV0dXJuIDgwDQo+IGJ5 dGVzIG5vdCBjb3BpZWQ7IHRoZSBjb2RlIGJlbG93IHdvdWxkIHJldHVybiAxMjggYnl0ZXMgbm90 IGNvcGllZCwgZXZlbg0KPiB0aG91Z2ggNDggYnl0ZXMgaGF2ZSBhY3R1YWxseSBiZWVuIHdyaXR0 ZW4gdG8gdGhlIGRlc3RpbmF0aW9uLg0KDQpBcmUgdGhlcmUgYW55IG5vbi1zdXBlcnNjYWxlciBh bWQ2NCBjcHUgKHRoYXQgYW55b25lIGNhcmVzIGFib3V0KT8NCg0KSWYgdGhlIGNwdSBjYW4gZXhl Y3V0ZSBtdWx0aXBsZSBpbnN0cnVjdGlvbnMgaW4gb25lIGNsb2NrDQp0aGVuIGl0IGlzIHVzdWFs bHkgcG9zc2libGUgdG8gZ2V0IHRoZSBsb29wIGNvbnRyb2wgKGFsbW9zdCkgZnJlZS4NCg0KWW91 IG1pZ2h0IG5lZWQgdG8gdW5yb2xsIG9uY2UgdG8gaW50ZXJsZWF2ZSByZWFkL3dyaXRlDQpidXQg YW55IG1vcmUgbWF5IGJlIHBvaW50bGVzcy4NClNvIHNvbWV0aGluZyBsaWtlOg0KCWEgPSAqc3Jj KysNCglkbyB7DQoJCWIgPSAqc3JjKys7DQoJCSpkc3QrKyA9IGE7DQoJCWEgPSAqc3JjKys7DQoJ CSpkc3QrKyA9IGI7DQoJfSB3aGlsZSAoc3JjICE9IGxpbSk7DQoJKmRzdCsrID0gYjsNCg0KICAg IERhdmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwgQnJhbWxleSBSb2FkLCBN b3VudCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAx Mzk3Mzg2IChXYWxlcykNCg==