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=-7.6 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 A9957C433F5 for ; Tue, 7 Sep 2021 09:14:01 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3BBAF61101 for ; Tue, 7 Sep 2021 09:14:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 3BBAF61101 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:39188 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mNXB2-0004TQ-G8 for qemu-devel@archiver.kernel.org; Tue, 07 Sep 2021 05:14:00 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:55530) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mNXA3-0002vp-2I; Tue, 07 Sep 2021 05:12:59 -0400 Received: from szxga01-in.huawei.com ([45.249.212.187]:2917) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mNX9z-0003em-IN; Tue, 07 Sep 2021 05:12:58 -0400 Received: from dggemv703-chm.china.huawei.com (unknown [172.30.72.54]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4H3fZj3rYFzbmHp; Tue, 7 Sep 2021 17:08:45 +0800 (CST) Received: from dggpemm500023.china.huawei.com (7.185.36.83) by dggemv703-chm.china.huawei.com (10.3.19.46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Tue, 7 Sep 2021 17:12:36 +0800 Received: from [10.174.187.128] (10.174.187.128) by dggpemm500023.china.huawei.com (7.185.36.83) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2308.8; Tue, 7 Sep 2021 17:12:35 +0800 Subject: Re: [PATCH v6 0/5] hw/arm/virt: Introduce cpu topology support To: Andrew Jones References: <20210824122016.144364-1-wangyanan55@huawei.com> <77ee3e41-e985-74f8-8510-1c47903689a8@huawei.com> <342f66ab-5c03-4aa3-b398-1e02926d86f7@huawei.com> <20210906161523.4kc5l3usbw6l2s6r@gator.home> From: "wangyanan (Y)" Message-ID: <7bed1b6f-562f-8b43-b63b-5e2530170523@huawei.com> Date: Tue, 7 Sep 2021 17:12:35 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: <20210906161523.4kc5l3usbw6l2s6r@gator.home> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Originating-IP: [10.174.187.128] X-ClientProxiedBy: dggeme701-chm.china.huawei.com (10.1.199.97) To dggpemm500023.china.huawei.com (7.185.36.83) X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.187; envelope-from=wangyanan55@huawei.com; helo=szxga01-in.huawei.com X-Spam_score_int: -64 X-Spam_score: -6.5 X-Spam_bar: ------ X-Spam_report: (-6.5 / 5.0 requ) BAYES_00=-1.9, NICE_REPLY_A=-2.332, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Salil Mehta , "Michael S . Tsirkin" , QEMU Developers , Shannon Zhao , qemu-arm , Alistair Francis , wanghaibin.wang@huawei.com, Igor Mammedov , David Gibson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 2021/9/7 0:15, Andrew Jones wrote: > On Fri, Sep 03, 2021 at 03:38:13PM +0800, wangyanan (Y) wrote: >> On 2021/9/3 15:25, Peter Maydell wrote: >>> On Fri, 3 Sept 2021 at 08:05, wangyanan (Y) wrote: >>>> On 2021/9/2 23:56, Peter Maydell wrote: >>>>> On Tue, 24 Aug 2021 at 13:20, Yanan Wang wrote: >>>>>> This new version is based on patch series [1] which introduces some >>>>>> fix and improvement for smp parsing. >>>>>> >>>>>> Description: >>>>>> Once the view of an accurate virtual cpu topology is provided to guest, >>>>>> with a well-designed vCPU pinning to the pCPU we may get a huge benefit, >>>>>> e.g., the scheduling performance improvement. See Dario Faggioli's >>>>>> research and the related performance tests in [2] for reference. >>>>>> >>>>>> This patch series introduces cpu topology support for ARM platform. >>>>>> Both cpu-map in DT and ACPI PPTT table are introduced to store the >>>>>> topology information. And we only describe the topology information >>>>>> to 6.2 and newer virt machines, considering compatibility. >>>>>> >>>>>> patches not yet reviewed: #1 and #3. >>>>>> >>>>>> [1] https://lore.kernel.org/qemu-devel/20210823122804.7692-1-wangyanan55@huawei.com/ >>>>>> [2] https://kvmforum2020.sched.com/event/eE1y/virtual-topology-for-virtual-machines >>>>>> -friend-or-foe-dario-faggioli-suse >>>>> Hi; this series doesn't apply to current head-of-git. Is it >>>>> intended to be based on some other series ? >>>>> >>>> Yes, it was based on the -smp parsing changes in [1] which hasn't been >>>> picked yet. Given that [1] somehow affects the topology parsing results >>>> which we will describe to guest, I think it may be better that [1] can be >>>> merged first and then this series follows. >>> OK. I'll ignore this for now; please resend once that other series >>> has been accepted. >> Got it. > Also, you'll likely want to rebase on Igor's acpi refactor series[*] > > [*] https://www.mail-archive.com/qemu-devel@nongnu.org/msg822151.html > Ok, sure. I can wait for a while and will rebase the ACPI changes on Igor's series for next version. Thanks, Yanan