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Shenoy" , "Swapnil Sapkal" , Chen Yu , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Anna-Maria Behnsen , Frederic Weisbecker , Thomas Gleixner References: <20251208083602.31898-1-kprateek.nayak@amd.com> <48ced285-f0d2-4da1-9955-12f9c4d7692d@linux.ibm.com> Content-Language: en-US From: K Prateek Nayak In-Reply-To: <48ced285-f0d2-4da1-9955-12f9c4d7692d@linux.ibm.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit Received-SPF: None (SATLEXMB04.amd.com: kprateek.nayak@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH3PEPF00000014:EE_|SA0PR12MB4399:EE_ X-MS-Office365-Filtering-Correlation-Id: 2f7995bb-a691-44b6-1805-08de36806480 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|36860700013|7416014|376014|1800799024; X-Microsoft-Antispam-Message-Info: =?utf-8?B?NTlsMUZKcjdwcjFMUnlSWEtrQlMxaEtFZEdxV0wzRTRIeDE0Sk10WFcxb1dD?= =?utf-8?B?djlGM2VYeVFXOU41K1M4N3hjRFdiWEcrd29BeWNwSlQySDJZMWZPMXVhWnBm?= =?utf-8?B?d3JQcHh0VzZPcjlEOWRaMG8zeEJiYThDbGFyRTY1dXlKQmhVb2RET1grTVpK?= =?utf-8?B?THBUcDdXbXNhdjlrclNNUGE4Rm45RG1sNTROd2orS3Awemdrb1BCT3dJZ01r?= =?utf-8?B?c3NPVmx5b2pZUnBXaVFLY1dLLzNEL2orazRlZGVqYUNqWWZtNkZ6MUdwUzNy?= =?utf-8?B?UW5aRU44d0h0Sml2ZEkxS1hCVGZUbjZKb045QzF5RGFDd2VnSVh1bHNyQ013?= =?utf-8?B?K0xIL2o1UzM2UEFNRllmRUdFOEdHZEpKdzZETVA4YnlsaUYybTdSSVNhZWNn?= =?utf-8?B?L3FqWFhXYUlELzFSNWxYUStkYUlMYmtqZDgwdkxVNGNGWVVJdVN5RzUrcFRE?= =?utf-8?B?RkN1QlZlN2NYRGFtUWNEOUplektOUmRpK1VYZ25ZR2Z2K0pFZ0xUbVVpcmlP?= =?utf-8?B?aHBMNFd2QnJSWmlhV3R0UXpnNVJlYlhaWTkrYndkb1k0bWNONUxmeFZ5RFhh?= =?utf-8?B?SmhmTDJNajNsV0RwY2trU2lCa3BhczFHblVqVnBPNkxGaGRRZjluT2dvSEdK?= =?utf-8?B?WjM4dVI5b245dUVma0RXdzRPQXMwWnZ2eUFBR242TXY2Vmw4Y0JjVWUyTzhh?= =?utf-8?B?N2grblM5aGRiNWZDZVRsQmUyM2NVUVhudUo4ZUJtTUJPbjc4c0Fvc28xTUp2?= =?utf-8?B?ZnpXbVp4bEw3TTBHL0hyb3IxQk1VcFViVU50Q1hHRUFyOW1HYVlQQ05FY2lr?= =?utf-8?B?VXRXOFlaNHVacUhXMVRIdHgxSm9QbFVLbWFscGtLQUxxeE5SSVlIWEhpSk9P?= =?utf-8?B?WjNvS05aSGhWOVlJMHgzbm9kbWRNWTlNbitFblNOazBzWEJWVFA5R25pNHBN?= =?utf-8?B?ODN5R2JONHhYMThSWkJEdUp1dlpzUnZ2SkJ4SVRDYkZwR0NadGJyQXZUbk82?= =?utf-8?B?bmhFbGVrQnptakl1cHBmOEQzTGxlSi91OTRqMHg0ZEFwQXQzU2J1YmpkUi9w?= =?utf-8?B?WWNBVzlvQW91MnFrd1pKdDdSS214cmtIc1owY2ZCTTNGTGwvdlZkbzNQRTI1?= =?utf-8?B?VTZpb3ZONHozelpqNFprY2hoVzRZVWMrVHZjVnlxY1lLOGhTbXF2UTljSnJW?= =?utf-8?B?a0xnM0dtNDFhUndoeUY0QUZURzNXZzdkdVpFTnRyM2V1MTYzd1dIZi96M3lF?= =?utf-8?B?VHFWSlNHQmxvUDE3WWJzeHh1Myt3ek8zaUlYd0lSTWZ4NmFKaHdJa0xCbE5P?= =?utf-8?B?dTc1c1grQzVDck53eTlySFZ4MTRwdWdjcE5DUG1hc3lJN0ZlZm9NbHRMOUdB?= =?utf-8?B?TDl5K1dUSll3akpJczdMTzU0TjYxN1k0L2o3ZVF0U2JDb3JrdnRxZnhkRmZC?= =?utf-8?B?czlXMkV4SlY4dm1jU1VrakxZQmlzT3pzUU15RGoxSjV3NWlMZjZGSnBIcEZD?= =?utf-8?B?dVhCSUt0WXpxcFV3SUI3MzI3Z0dDYTZMK3V6ZXVuU0dZQ0d3SndldlV3ZTNT?= =?utf-8?B?bEY5N1dwNEsvQWJDS1FhN1c1VEg3WXI0Wkc1V1lKbW5FUy9KNTNVQ0FpT09w?= =?utf-8?B?S3BzdTB0M3NnZzVSWE9qaC9DaFJwZjE3NmsxVllSUFg0R3Q4djZLZUg0N2NC?= =?utf-8?B?RnF2ekRwckRUT3EvOXdackJmNEhqRDZ6TGx0bXRiRGc0MXpzU29FRytDcGZR?= =?utf-8?B?SnNEV1JXeVc3dUpqWHhKZi9xelJRUlIwNFh6aldoZWdjVk4xMnB0ZHVSaEJi?= =?utf-8?B?K0RDNzZCcDVnU1lGWVF1djNERlVnTFRINW9Jam1rOExiSFpKV3QzaktENGR3?= =?utf-8?B?QVJGelBzdjRmWEx1YnN1Ujc1ejRQTDUrU2lDclhWL0tDM0hQWCtKSTRCWUxB?= =?utf-8?B?dnI1TDlKUFFRMERIWjVEU0JWazJscldWMi9XR2R6RlIwc2lSSktKdERhZ1BX?= =?utf-8?B?RWJJUnpxWkVhS2VjV1dyZUZ6OGtMeHJTYU0zRW9iQ3h0OWVIamJIVHRHNElk?= =?utf-8?B?Nk1VaWNacmhGa3NuelhYTy9vUzRaaVhacVhiaWdCeUluWHhPODhxdmtXOHly?= =?utf-8?Q?xirQ=3D?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb08.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(82310400026)(36860700013)(7416014)(376014)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Dec 2025 17:37:00.2478 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2f7995bb-a691-44b6-1805-08de36806480 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CH3PEPF00000014.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA0PR12MB4399 Hello Shrikanth, On 12/8/2025 7:34 PM, Shrikanth Hegde wrote: >> 2. The "nohz.nr_idle" and "nohz.idle_cpus" are global system-wide >>     variables that can run into scalability bottlenecks on a large >>     core-count system. >> > > I think they are nohz.nr_cpus and nohz.idle_cpus_mask. isn't it? Ack! Sorry my brain is all mush at this point staring at all the new and old "nohz.*" variable names. Thank you for catching that. -- Thanks and Regards, Prateek