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Thu, 17 Aug 2023 20:29:42 +0000 Message-ID: Date: Thu, 17 Aug 2023 13:29:37 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Firefox/102.0 Thunderbird/102.14.0 Subject: Re: [RFC 00/12] ARM: MPAM: add support for priority partitioning control Content-Language: en-US From: Reinette Chatre To: Amit Singh Tomar , , CC: , , , , , "Luck, Tony" References: <20230815152712.1760046-1-amitsinght@marvell.com> In-Reply-To: X-ClientProxiedBy: MW4PR03CA0134.namprd03.prod.outlook.com (2603:10b6:303:8c::19) To SJ2PR11MB7573.namprd11.prod.outlook.com (2603:10b6:a03:4d2::10) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ2PR11MB7573:EE_|PH0PR11MB5112:EE_ X-MS-Office365-Filtering-Correlation-Id: 0c3c6816-5f80-4fde-dddc-08db9f60aff3 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:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SJ2PR11MB7573.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230031)(136003)(346002)(396003)(376002)(39860400002)(366004)(451199024)(1800799009)(186009)(31686004)(36756003)(86362001)(31696002)(38100700002)(82960400001)(478600001)(2616005)(5660300002)(44832011)(107886003)(66556008)(66476007)(6666004)(53546011)(316002)(6506007)(6486002)(66946007)(6512007)(26005)(41300700001)(4326008)(8936002)(8676002)(2906002)(83380400001)(43740500002)(45980500001);DIR:OUT;SFP:1102; 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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 Amit, On 8/17/2023 12:11 PM, Reinette Chatre wrote: > On 8/15/2023 8:27 AM, Amit Singh Tomar wrote: >> >> Within the DDR QoS traffic class. >> >> 0--5 ----> Low priority value >> 6-10 ----> Medium priority value >> 11-15 ----> High priority value >> >> Benchmark[4] used is multichase. >> >> Two partition P1 and P2: >> >> Partition P1: >> ------------- >> Assigned core 0 >> 100% BW assignment >> >> Partition P2: >> ------------- >> Assigned cores 1-79 >> 100% BW assignment >> >> Test Script: >> ----------- >> mkdir p1 >> cd p1 >> echo 1 > cpus >> echo L3:1=8000,5 > schemata ##### DSPRI set as 5 (lpr) >> echo "MB:0=100" > schemata I peeked at the next commit and I am missing something. It looks like indeed resource instances need to support different controls, so that seems to answer my earlier question. How to let user know what is supported where remains an open, now with understanding that the information is required to be per resource instance. The first commit mentions that #0 has the Priority partitioning feature but in these examples the schemata of #1 is updated to modify the priority. Also, if I understand correctly CPOR and priority partitioning are mutually exclusive so I find it confusing to see a bitmap and a priority written to a single resource. Reinette _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel