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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 CD804C433B4 for ; Tue, 13 Apr 2021 08:39:46 +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 610A7613AE for ; Tue, 13 Apr 2021 08:39:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 610A7613AE Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:44990 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lWEaH-000613-Fd for qemu-devel@archiver.kernel.org; Tue, 13 Apr 2021 04:39:45 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49438) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lWET0-0008Pw-2J; Tue, 13 Apr 2021 04:32:14 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:5360) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lWESw-0004tK-Rs; Tue, 13 Apr 2021 04:32:13 -0400 Received: from DGGEMS403-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4FKJgd1MGvz1BGXj; Tue, 13 Apr 2021 16:29:49 +0800 (CST) Received: from DESKTOP-TMVL5KK.china.huawei.com (10.174.187.128) by DGGEMS403-HUB.china.huawei.com (10.3.19.203) with Microsoft SMTP Server id 14.3.498.0; Tue, 13 Apr 2021 16:31:55 +0800 From: Yanan Wang To: , Subject: [RFC PATCH v2 2/4] hw/arm/virt: Parse -smp cluster parameter in virt_smp_parse Date: Tue, 13 Apr 2021 16:31:45 +0800 Message-ID: <20210413083147.34236-3-wangyanan55@huawei.com> X-Mailer: git-send-email 2.8.4.windows.1 In-Reply-To: <20210413083147.34236-1-wangyanan55@huawei.com> References: <20210413083147.34236-1-wangyanan55@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.174.187.128] X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.190; envelope-from=wangyanan55@huawei.com; helo=szxga04-in.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=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: Barry Song , Peter Maydell , Andrew Jones , "Michael S . Tsirkin" , wanghaibin.wang@huawei.com, yangyicong@huawei.com, Yanan Wang , Shannon Zhao , Alistair Francis , prime.zeng@hisilicon.com, Paolo Bonzini , yuzenghui@huawei.com, Igor Mammedov , zhukeqian1@huawei.com, Jiajie Li , David Gibson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" There is a separate function virt_smp_parse() in hw/virt/arm.c used to parse cpu topology for the ARM machines. So add parsing of -smp cluster parameter in it, then total number of logical cpus will be calculated like: max_cpus = sockets * clusters * cores * threads. In virt_smp_parse(), the computing logic of missing values prefers cores over sockets over threads. And for compatibility, the value of clusters will be set as default 1 if not explicitly specified. Signed-off-by: Yanan Wang --- hw/arm/virt.c | 32 ++++++++++++++++++-------------- 1 file changed, 18 insertions(+), 14 deletions(-) diff --git a/hw/arm/virt.c b/hw/arm/virt.c index 57ef961cb5..51797628db 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -2639,35 +2639,38 @@ static void virt_smp_parse(MachineState *ms, QemuOpts *opts) if (opts) { unsigned cpus = qemu_opt_get_number(opts, "cpus", 0); unsigned sockets = qemu_opt_get_number(opts, "sockets", 0); + unsigned clusters = qemu_opt_get_number(opts, "clusters", 1); unsigned cores = qemu_opt_get_number(opts, "cores", 0); unsigned threads = qemu_opt_get_number(opts, "threads", 0); + VirtMachineState *vms = VIRT_MACHINE(ms); /* - * Compute missing values; prefer cores over sockets and - * sockets over threads. + * Compute missing values; prefer cores over sockets and sockets + * over threads. For compatibility, value of clusters will have + * been set as default 1 if not explicitly specified. */ if (cpus == 0 || cores == 0) { sockets = sockets > 0 ? sockets : 1; threads = threads > 0 ? threads : 1; if (cpus == 0) { cores = cores > 0 ? cores : 1; - cpus = cores * threads * sockets; + cpus = sockets * clusters * cores * threads; } else { ms->smp.max_cpus = qemu_opt_get_number(opts, "maxcpus", cpus); - cores = ms->smp.max_cpus / (sockets * threads); + cores = ms->smp.max_cpus / (sockets * clusters * threads); } } else if (sockets == 0) { threads = threads > 0 ? threads : 1; - sockets = cpus / (cores * threads); + sockets = cpus / (clusters * cores * threads); sockets = sockets > 0 ? sockets : 1; } else if (threads == 0) { - threads = cpus / (cores * sockets); + threads = cpus / (sockets * clusters * cores); threads = threads > 0 ? threads : 1; - } else if (sockets * cores * threads < cpus) { + } else if (sockets * clusters * cores * threads < cpus) { error_report("cpu topology: " - "sockets (%u) * cores (%u) * threads (%u) < " - "smp_cpus (%u)", - sockets, cores, threads, cpus); + "sockets (%u) * clusters (%u) * cores (%u) * " + "threads (%u) < smp_cpus (%u)", + sockets, clusters, cores, threads, cpus); exit(1); } @@ -2678,11 +2681,11 @@ static void virt_smp_parse(MachineState *ms, QemuOpts *opts) exit(1); } - if (sockets * cores * threads != ms->smp.max_cpus) { + if (sockets * clusters * cores * threads != ms->smp.max_cpus) { error_report("cpu topology: " - "sockets (%u) * cores (%u) * threads (%u)" - "!= maxcpus (%u)", - sockets, cores, threads, + "sockets (%u) * clusters (%u) * cores (%u) * " + "threads (%u) != maxcpus (%u)", + sockets, clusters, cores, threads, ms->smp.max_cpus); exit(1); } @@ -2691,6 +2694,7 @@ static void virt_smp_parse(MachineState *ms, QemuOpts *opts) ms->smp.cores = cores; ms->smp.threads = threads; ms->smp.sockets = sockets; + vms->smp_clusters = clusters; } if (ms->smp.cpus > 1) { -- 2.19.1