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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 0D83FC433EF for ; Wed, 20 Apr 2022 11:20:59 +0000 (UTC) Received: from localhost ([::1]:58852 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nh8OI-0004zE-3N for qemu-devel@archiver.kernel.org; Wed, 20 Apr 2022 07:20:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33798) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nh7we-0005Uc-BV for qemu-devel@nongnu.org; Wed, 20 Apr 2022 06:52:24 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:35096) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nh7wb-0001Lp-If for qemu-devel@nongnu.org; Wed, 20 Apr 2022 06:52:24 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1650451941; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=qfJEE3/IG/WPlZJ9pG2XcS77Ozmlz/hB9OcChPelWtg=; b=aLTDhJesNUDct9xJ+nsPh6CJba+GL+hVKen+ZC6d2iw16cH9SEOpP96A2CoakL6+LWzG/t 1sfBsOk1HOSl799Jx8mJ90iKkMVXaSvVGrLyKQX8Ccn3Q6LJ101c4yM1pxn0/j4aFhdXaD Dx7B3vpDDdepR7SzvLPIjXjNruPMrJg= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-546-X91ww2HNNbm-H-edAX1goQ-1; Wed, 20 Apr 2022 06:52:17 -0400 X-MC-Unique: X91ww2HNNbm-H-edAX1goQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 24E0286B8A3; Wed, 20 Apr 2022 10:52:17 +0000 (UTC) Received: from gshan.redhat.com (ovpn-13-230.pek2.redhat.com [10.72.13.230]) by smtp.corp.redhat.com (Postfix) with ESMTP id 74AA940D1B9B; Wed, 20 Apr 2022 10:52:08 +0000 (UTC) From: Gavin Shan To: qemu-arm@nongnu.org Subject: [PATCH v7 3/4] hw/arm/virt: Fix CPU's default NUMA node ID Date: Wed, 20 Apr 2022 18:49:08 +0800 Message-Id: <20220420104909.233058-4-gshan@redhat.com> In-Reply-To: <20220420104909.233058-1-gshan@redhat.com> References: <20220420104909.233058-1-gshan@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.84 on 10.11.54.2 Received-SPF: pass client-ip=170.10.133.124; envelope-from=gshan@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lvivier@redhat.com, eduardo@habkost.net, thuth@redhat.com, berrange@redhat.com, shan.gavin@gmail.com, peter.maydell@linaro.org, Jonathan.Cameron@Huawei.com, zhenyzha@redhat.com, mst@redhat.com, qemu-devel@nongnu.org, armbru@redhat.com, wangyanan55@huawei.com, imammedo@redhat.com, ani@anisinha.ca, pbonzini@redhat.com, drjones@redhat.com, eblake@redhat.com, f4bug@amsat.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" When CPU-to-NUMA association isn't explicitly provided by users, the default one is given by mc->get_default_cpu_node_id(). However, the CPU topology isn't fully considered in the default association and this causes CPU topology broken warnings on booting Linux guest. For example, the following warning messages are observed when the Linux guest is booted with the following command lines. /home/gavin/sandbox/qemu.main/build/qemu-system-aarch64 \ -accel kvm -machine virt,gic-version=host \ -cpu host \ -smp 6,sockets=2,cores=3,threads=1 \ -m 1024M,slots=16,maxmem=64G \ -object memory-backend-ram,id=mem0,size=128M \ -object memory-backend-ram,id=mem1,size=128M \ -object memory-backend-ram,id=mem2,size=128M \ -object memory-backend-ram,id=mem3,size=128M \ -object memory-backend-ram,id=mem4,size=128M \ -object memory-backend-ram,id=mem4,size=384M \ -numa node,nodeid=0,memdev=mem0 \ -numa node,nodeid=1,memdev=mem1 \ -numa node,nodeid=2,memdev=mem2 \ -numa node,nodeid=3,memdev=mem3 \ -numa node,nodeid=4,memdev=mem4 \ -numa node,nodeid=5,memdev=mem5 : alternatives: patching kernel code BUG: arch topology borken the CLS domain not a subset of the MC domain BUG: arch topology borken the DIE domain not a subset of the NODE domain With current implementation of mc->get_default_cpu_node_id(), CPU#0 to CPU#5 are associated with NODE#0 to NODE#5 separately. That's incorrect because CPU#0/1/2 should be associated with same NUMA node because they're seated in same socket. This fixes the issue by considering the socket ID when the default CPU-to-NUMA association is provided in virt_possible_cpu_arch_ids(). With this applied, no more CPU topology broken warnings are seen from the Linux guest. The 6 CPUs are associated with NODE#0/1, but there are no CPUs associated with NODE#2/3/4/5. Signed-off-by: Gavin Shan Reviewed-by: Igor Mammedov Reviewed-by: Yanan Wang --- hw/arm/virt.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/hw/arm/virt.c b/hw/arm/virt.c index 5443ecae92..c3477a8a17 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -2497,7 +2497,9 @@ virt_cpu_index_to_props(MachineState *ms, unsigned cpu_index) static int64_t virt_get_default_cpu_node_id(const MachineState *ms, int idx) { - return idx % ms->numa_state->num_nodes; + int64_t socket_id = ms->possible_cpus->cpus[idx].props.socket_id; + + return socket_id % ms->numa_state->num_nodes; } static const CPUArchIdList *virt_possible_cpu_arch_ids(MachineState *ms) -- 2.23.0