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Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 Subject: Re: [Patch v7] ACPI: processor: reduce CPUFREQ thermal reduction pctg for Tegra241 Content-Language: en-US To: Sudeep Holla CC: , , , , , , , , , , , , , , , , Sumit Gupta References: <20231123121433.12089-1-sumitg@nvidia.com> From: Sumit Gupta In-Reply-To: X-Originating-IP: [10.126.230.35] X-ClientProxiedBy: rnnvmail203.nvidia.com (10.129.68.9) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF0002529E:EE_|MW3PR12MB4442:EE_ X-MS-Office365-Filtering-Correlation-Id: 9e794569-7809-42be-8b84-08dbec2efbbe X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230031)(4636009)(396003)(39860400002)(346002)(136003)(376002)(230173577357003)(230922051799003)(230273577357003)(451199024)(1800799012)(82310400011)(64100799003)(186009)(36840700001)(46966006)(40470700004)(40460700003)(54906003)(336012)(426003)(83380400001)(53546011)(2616005)(36860700001)(107886003)(47076005)(316002)(8676002)(4326008)(5660300002)(8936002)(41300700001)(7416002)(2906002)(478600001)(16526019)(26005)(6916009)(16576012)(70206006)(70586007)(31696002)(86362001)(82740400003)(7636003)(356005)(36756003)(40480700001)(31686004)(43740500002);DIR:OUT;SFP:1101; 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charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 23/11/23 19:30, Sudeep Holla wrote: > External email: Use caution opening links or attachments > > > On Thu, Nov 23, 2023 at 05:44:33PM +0530, Sumit Gupta wrote: >> From: Srikar Srimath Tirumala >> >> Current implementation of processor_thermal performs software throttling >> in fixed steps of "20%" which can be too coarse for some platforms. >> We observed some performance gain after reducing the throttle percentage. >> Change the CPUFREQ thermal reduction percentage and maximum thermal steps >> to be configurable. Also, update the default values of both for Nvidia >> Tegra241 (Grace) SoC. The thermal reduction percentage is reduced to "5%" >> and accordingly the maximum number of thermal steps are increased as they >> are derived from the reduction percentage. >> >> Signed-off-by: Srikar Srimath Tirumala >> Co-developed-by: Sumit Gupta >> Signed-off-by: Sumit Gupta >> --- >> >> Sending this patch separately as the other patch in the series is >> applied by Rafael in v6[1]. Revision history before this version is >> in the cover letter of v6[1]. >> >> Please review and provide ACK if looks fine. >> > > For arm64 specific changes(a minor nit below though), > > Acked-by: Sudeep Holla > > > [...] > Thank you. >> diff --git a/drivers/acpi/arm64/thermal_cpufreq.c b/drivers/acpi/arm64/thermal_cpufreq.c >> new file mode 100644 >> index 000000000000..d524f2cd6044 >> --- /dev/null >> +++ b/drivers/acpi/arm64/thermal_cpufreq.c >> @@ -0,0 +1,20 @@ >> +// SPDX-License-Identifier: GPL-2.0-only >> +#include >> + >> +#include "../internal.h" >> + >> +#define SMCCC_SOC_ID_T241 0x036b0241 >> + > > [nit] We really need to find better place to define this globally and not > locally at each usage site like this. We already have it in GICv3 driver. > But that can come as a cleanup later if it causes issue for merging this > change. > > -- > Regards, > Sudeep Sure, will check and send a separate patch later on top. Best Regards, Sumit Gupta _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel