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=-6.1 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 22BA7C433EF for ; Fri, 3 Sep 2021 07:39:14 +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 4D15A60E0B for ; Fri, 3 Sep 2021 07:39:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 4D15A60E0B 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]:45806 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mM3n6-0002fa-BE for qemu-devel@archiver.kernel.org; Fri, 03 Sep 2021 03:39:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54226) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mM3mM-0001mb-9L; Fri, 03 Sep 2021 03:38:26 -0400 Received: from szxga08-in.huawei.com ([45.249.212.255]:2856) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mM3mJ-0008MP-ML; Fri, 03 Sep 2021 03:38:26 -0400 Received: from dggemv703-chm.china.huawei.com (unknown [172.30.72.55]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4H18lG5BPzz1DG2L; Fri, 3 Sep 2021 15:37:30 +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 15.1.2176.2; Fri, 3 Sep 2021 15:38:14 +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; Fri, 3 Sep 2021 15:38:14 +0800 Subject: Re: [PATCH v6 0/5] hw/arm/virt: Introduce cpu topology support To: Peter Maydell References: <20210824122016.144364-1-wangyanan55@huawei.com> <77ee3e41-e985-74f8-8510-1c47903689a8@huawei.com> From: "wangyanan (Y)" Message-ID: <342f66ab-5c03-4aa3-b398-1e02926d86f7@huawei.com> Date: Fri, 3 Sep 2021 15:38:13 +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: 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: dggeme717-chm.china.huawei.com (10.1.199.113) To dggpemm500023.china.huawei.com (7.185.36.83) X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.255; envelope-from=wangyanan55@huawei.com; helo=szxga08-in.huawei.com X-Spam_score_int: -63 X-Spam_score: -6.4 X-Spam_bar: ------ X-Spam_report: (-6.4 / 5.0 requ) BAYES_00=-1.9, NICE_REPLY_A=-2.225, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=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: Andrew Jones , "Michael S . Tsirkin" , QEMU Developers , Shannon Zhao , qemu-arm , Alistair Francis , Igor Mammedov , wanghaibin.wang@huawei.com, Salil Mehta , David Gibson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" 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. Thanks, Yanan > thanks > -- PMM > > .