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Shenoy" To: "Rafael J. Wysocki" Cc: Dhananjay Ugwekar , peterz@infradead.org, mingo@redhat.com, acme@kernel.org, namhyung@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, irogers@google.com, adrian.hunter@intel.com, kan.liang@linux.intel.com, tglx@linutronix.de, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, rui.zhang@intel.com, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, ananth.narayan@amd.com, kprateek.nayak@amd.com, ravi.bangoria@amd.com, Michael Larabel Subject: Re: [PATCH v2 2/2] powercap/intel_rapl: Fix the energy-pkg event for AMD CPUs Message-ID: References: <20240730044917.4680-1-Dhananjay.Ugwekar@amd.com> <20240730044917.4680-3-Dhananjay.Ugwekar@amd.com> <3c6e2fb3-4b51-4cda-a5ca-71bed94d47b9@amd.com> Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-ClientProxiedBy: PN3PR01CA0042.INDPRD01.PROD.OUTLOOK.COM (2603:1096:c01:98::7) To DS7PR12MB8252.namprd12.prod.outlook.com (2603:10b6:8:ee::7) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS7PR12MB8252:EE_|SA1PR12MB7224:EE_ X-MS-Office365-Filtering-Correlation-Id: 912e08cc-bc43-46ee-26a9-08dcc19dbb1a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|7416014|376014; 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Wysocki wrote: > On Thu, Aug 8, 2024 at 1:18 PM Dhananjay Ugwekar > wrote: > > > > Hello Rafael, > > > > On 8/2/2024 6:05 PM, Rafael J. Wysocki wrote: > > > On Tue, Jul 30, 2024 at 6:53 AM Dhananjay Ugwekar > > > wrote: > > >> > > >> After commit ("x86/cpu/topology: Add support for the AMD 0x80000026 leaf"), > > >> on AMD processors that support extended CPUID leaf 0x80000026, the > > >> topology_logical_die_id() macros, no longer returns package id, instead it > > >> returns the CCD (Core Complex Die) id. This leads to the energy-pkg > > >> event scope to be modified to CCD instead of package. > > >> > > >> For more historical context, please refer to commit 32fb480e0a2c > > >> ("powercap/intel_rapl: Support multi-die/package"), which initially changed > > >> the RAPL scope from package to die for all systems, as Intel systems > > >> with Die enumeration have RAPL scope as die, and those without die > > >> enumeration are not affected. So, all systems(Intel, AMD, Hygon), worked > > >> correctly with topology_logical_die_id() until recently, but this changed > > >> after the "0x80000026 leaf" commit mentioned above. > > >> > > >> Future multi-die Intel systems will have package scope RAPL counters, > > >> but they will be using TPMI RAPL interface, which is not affected by > > >> this change. > > >> > > >> Replacing topology_logical_die_id() with topology_physical_package_id() > > >> conditionally only for AMD and Hygon fixes the energy-pkg event. > > >> > > >> On an AMD 2 socket 8 CCD Zen4 server: > > >> > > >> Before: > > >> > > >> linux$ ls /sys/class/powercap/ > > >> intel-rapl intel-rapl:4 intel-rapl:8:0 intel-rapl:d > > >> intel-rapl:0 intel-rapl:4:0 intel-rapl:9 intel-rapl:d:0 > > >> intel-rapl:0:0 intel-rapl:5 intel-rapl:9:0 intel-rapl:e > > >> intel-rapl:1 intel-rapl:5:0 intel-rapl:a intel-rapl:e:0 > > >> intel-rapl:1:0 intel-rapl:6 intel-rapl:a:0 intel-rapl:f > > >> intel-rapl:2 intel-rapl:6:0 intel-rapl:b intel-rapl:f:0 > > >> intel-rapl:2:0 intel-rapl:7 intel-rapl:b:0 > > >> intel-rapl:3 intel-rapl:7:0 intel-rapl:c > > >> intel-rapl:3:0 intel-rapl:8 intel-rapl:c:0 > > >> > > >> After: > > >> > > >> linux$ ls /sys/class/powercap/ > > >> intel-rapl intel-rapl:0 intel-rapl:0:0 intel-rapl:1 intel-rapl:1:0 > > >> > > >> Only one sysfs entry per-event per-package is created after this change. > > >> > > >> Fixes: 63edbaa48a57 ("x86/cpu/topology: Add support for the AMD 0x80000026 leaf") > > >> Reported-by: Michael Larabel > > >> Signed-off-by: Dhananjay Ugwekar > > >> Reviewed-by: Zhang Rui > > >> --- > > >> Changes in v2: > > >> * Updated scope description comment, commit log > > >> * Rename rapl_pmu_is_pkg_scope() to rapl_msrs_are_pkg_scope() > > >> * Check topology_logical_(die/package)_id return value > > > > > > This patch does not depend on the first one in the series if I'm not > > > mistaken, in which case I can pick it up separately if you want me to > > > do that, so please let me know. > > > > Sorry for the late reply, was out sick, > > > > Yes, please pick this patch separately, it is independent from the first one. > > OK, applied as 6.12 material. Can this go into 6.11 fixes? It fixes the commit 63edbaa48a57 ("x86/cpu/topology: Add support for the AMD 0x80000026 leaf") which got merged in 6.10. -- Thanks and Regards gautham.