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=-9.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 6B3A5C433ED for ; Tue, 18 May 2021 13:14:12 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 352A26109E for ; Tue, 18 May 2021 13:14:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 352A26109E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:References:In-Reply-To: Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=RJbzhIynNupApavEnlg+AHClSysDuyYfrm8aok/JNg4=; b=MFrMcocdJSxVFZGT1ad92VMFy bhxeFZGQ9vZxWh57epHFqjrzNE9o1rOv3IxnAfhV/cUz9m1T1ifXgVCbgFPb0TOaljArSz/lYg1MO DAYJSdhbCPk1KENgNvrM659BU5W7Ykko9Y52QaxaZdGpNywJ1TpyTu4ZRUGLlg3xlVMnXaGPk0oaU 7FPPzexAZbrT46X7gTDyc1l4oaFbJBjfq6yNJ5rF2O/H5jacE/fqoCqMJzQUZvJLPCOD6O3idl6QR PSl1HEm1ijltPt+E97/x2AHF5nzGOVkJwvZ93Fh4cwIvD5Ph66hYppf54eEogUcXd0fOZm0Igt7LY R3TvgEq9g==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lizWG-000qTo-I0; Tue, 18 May 2021 13:12:20 +0000 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lizWD-000qTf-9H for linux-arm-kernel@desiato.infradead.org; Tue, 18 May 2021 13:12:17 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Type:MIME-Version:Message-ID: Date:References:In-Reply-To:Subject:Cc:To:From:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=ffLtiVQVOfwBXPVGZlXP7+7F7MTjymPH0KhszwjU2IA=; b=SYCnRzMW4GH1+o2clToJ/WBGLY otWGFOOiHynapP1ROFvvEU6rUzRwBf2UTtmqL6PykpFWtqSxKZItYxB7OpBiIjKuiPxn45MGbRKV8 BljLMJp//Y0eGiKYyTdG3TxS5WU+e3L5zVGI6M7W6DNl1+PQ0tuloTM2Hu5m9t8tu+QCUcLKJIbJu UFLPQQ/6VFyyER83eFwp6LCMLy6AaPvsTfqT1osE+gJ0CW6td2q9xdcjSCJ0XIpY1mlpW4i/vyhq0 dYmcke1rFv1HQgr8ztl4fMDiC6Y6w2yYAd4dwNvWH3TadsAgYkQwc4TA171vOGZbqJ0s9AUPVBCDi ArV0ITsg==; Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lizW9-00Efof-Ay for linux-arm-kernel@lists.infradead.org; Tue, 18 May 2021 13:12:15 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 31A93D6E; Tue, 18 May 2021 06:12:11 -0700 (PDT) Received: from e113632-lin (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B68D83F73B; Tue, 18 May 2021 06:12:09 -0700 (PDT) From: Valentin Schneider To: Ionela Voinescu , Sudeep Holla , "Rafael J . Wysocki" , Thomas Gleixner , Ingo Molnar , Giovanni Gherdovich , Catalin Marinas , Will Deacon Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH 0/3] arch_topology, ACPI: populate cpu capacity from CPPC In-Reply-To: <20210514095339.12979-1-ionela.voinescu@arm.com> References: <20210514095339.12979-1-ionela.voinescu@arm.com> Date: Tue, 18 May 2021 14:12:03 +0100 Message-ID: <87fsyk190c.mognet@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210518_061213_443429_367DBE12 X-CRM114-Status: GOOD ( 13.95 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, On 14/05/21 10:53, Ionela Voinescu wrote: > Hi all, > > These are a few trivial patches to populate cpu capacity information > using performance information from ACPI's CPPC. > > I've tied this functionality to the existing function > init_freq_invariance_cppc() called in acpi_cppc_processor_probe(). > This function is renamed to a more generic arch_init_invariance_cppc(). > > The patches have been build tested on x86 and more thoroughly tested on > Juno R2 (arm64), which uses the new functionality, with the following > results: > > > root@ubuntu:~# dmesg | grep cpu_capacity > [ 2.157494] init_cpu_capacity_cppc: CPU0 cpu_capacity=38300 (raw). > [ 2.163699] init_cpu_capacity_cppc: CPU1 cpu_capacity=38300 (raw). > [ 2.169899] init_cpu_capacity_cppc: CPU2 cpu_capacity=38300 (raw). > [ 2.176098] init_cpu_capacity_cppc: CPU3 cpu_capacity=38300 (raw). > [ 2.182296] init_cpu_capacity_cppc: CPU4 cpu_capacity=102400 (raw). > [ 2.188581] init_cpu_capacity_cppc: CPU5 cpu_capacity=102400 (raw). > [ 2.194867] cpu_capacity: capacity_scale=102400 > [ 2.199409] cpu_capacity: CPU0 cpu_capacity=383 > [ 2.203952] cpu_capacity: CPU1 cpu_capacity=383 > [ 2.208495] cpu_capacity: CPU2 cpu_capacity=383 > [ 2.213037] cpu_capacity: CPU3 cpu_capacity=383 > [ 2.217580] cpu_capacity: CPU4 cpu_capacity=1024 > [ 2.222209] cpu_capacity: CPU5 cpu_capacity=1024 > [ 2.226886] init_cpu_capacity_cppc: cpu_capacity initialization done > > root@ubuntu:~# tail -n +1 /sys/devices/system/cpu/cpu*/cpu_capacity > ==> /sys/devices/system/cpu/cpu0/cpu_capacity <== > 383 > ==> /sys/devices/system/cpu/cpu1/cpu_capacity <== > 383 > ==> /sys/devices/system/cpu/cpu2/cpu_capacity <== > 383 > ==> /sys/devices/system/cpu/cpu3/cpu_capacity <== > 383 > ==> /sys/devices/system/cpu/cpu4/cpu_capacity <== > 1024 > ==> /sys/devices/system/cpu/cpu5/cpu_capacity <== > 1024 > > All works as expected even if ACPI processor support is built as a > module. > Tested on my Ampere eMAG; this all seems to work fine except for some scheduler debug stuff that gets confused; see http://lore.kernel.org/r/20210518130725.3563132-1-valentin.schneider@arm.com With that in mind: Tested-by: Valentin Schneider _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel