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Box" CC: "platform-driver-x86@vger.kernel.org" , Mika Westerberg , "Zha, Qipeng" , Mario Limonciello , LKML Subject: Re: Intel PMC driver on Broadwell system to gather C-State statistics Thread-Topic: Intel PMC driver on Broadwell system to gather C-State statistics Thread-Index: AQHWpSisja2BUtvZLkmJzfkp3Br+Zqmdfb8YgABPqHc= Date: Sun, 18 Oct 2020 20:25:16 +0000 Message-ID: References: , In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: molgen.mpg.de; dkim=none (message not signed) header.d=none;molgen.mpg.de; dmarc=none action=none header.from=intel.com; x-originating-ip: [134.134.136.198] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 429302dd-7397-4b72-12f4-08d873a3ed2e x-ms-traffictypediagnostic: MWHPR11MB2046: x-ld-processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8882; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: huwyJbCTy+Q6CSSiLDxDjbwwuheQcEmmryMHoWcEsxLWlbFeyqBAJCtI6jJ1ikFXIgpqL9yxOd2FKey5ZDzTr/IrE1mjqaaZIzmk1+R6cG9crkKMksW7r2jNvHDLltfj9jR1qjjaUlpDt0UjAwx1AKAS7hCwxjQGSLojHHLKhnSpf9aUAY0Ovhw3iWNF+UcpRu+f2vP0g1PPKlPnjDLamr0BRJTY1Ua8KEB+mTx82MgzVmpsRibqYp3CN1h3HxzzLShaT7i8aWLghgPVa1ueCWq89Xzk44dHhE8jRpUvBPV9+W9N/a0InxCeSPUHXLcPBGDUhgr7wet6oSDSK8uk3w== x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:MW3PR11MB4522.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(4636009)(366004)(346002)(396003)(376002)(136003)(39860400002)(7696005)(9686003)(478600001)(2906002)(4326008)(5660300002)(54906003)(55016002)(33656002)(8676002)(316002)(83380400001)(110136005)(52536014)(76116006)(53546011)(66946007)(86362001)(66446008)(71200400001)(2940100002)(91956017)(8936002)(66476007)(66556008)(6506007)(64756008)(26005)(186003);DIR:OUT;SFP:1102; x-ms-exchange-antispam-messagedata: 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 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: MW3PR11MB4522.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 429302dd-7397-4b72-12f4-08d873a3ed2e X-MS-Exchange-CrossTenant-originalarrivaltime: 18 Oct 2020 20:25:16.7027 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: ZbufLRL/MvnrcjQk2Y5MxFcpUYPRygjnrsg/uM2PP9GqVKG/ZrDDnSl6isFQgB+4bC0FtOueXIaHwxXscgaGjQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR11MB2046 X-OriginatorOrg: intel.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Box, David E =0A= Sent: Sunday, October 18, 2020 11:11 AM=0A= To: Paul Menzel ; Rajneesh Bhardwaj ; Vivi, Rodrigo =0A= Cc: platform-driver-x86@vger.kernel.org ; Mika Westerberg ; Zha, Qipeng ; Mario Limonciello ; LKML =0A= Subject: Re: Intel PMC driver on Broadwell system to gather C-State statist= ics =0A= =A0=0A= +Rodrigo for DMC quesiton=0A= =0A= Hi,=0A= =0A= If you are getting Package C7, but not C8, I'd be suspicious of the graphic= s display engine. However, in Skylake and beyond, this is managed by i915 D= MC firmware. In the Broadwell timeframe I don't know what the requirement w= as. Rodrigo?=0A= =0A= You can try turning off your display with xset for 20 seconds and then chec= king the Package residencies with powertop or turbostat to see if you got d= eeper than C7. This would at least point to graphics.=0A= =0A= As for the PMC=A0driver, it does not support Broadwell. I don't believe pro= be is completing successfully. That's the init function.=0A= =0A= David=0A= =0A= =0A= From: Paul Menzel =0A= Sent: Sunday, October 18, 2020 1:28:06 AM=0A= To: Rajneesh Bhardwaj ; Box, David E =0A= Cc: platform-driver-x86@vger.kernel.org ; Mika Westerberg ; Zha, Qipeng ; Mario Limonciello ; LKML =0A= Subject: Intel PMC driver on Broadwell system to gather C-State statistics = =0A= =A0=0A= Dear Linux folks,=0A= =0A= =0A= The Intel Broadwell-U laptop Dell Latitude E7250 (BIOS A19 01/23/2018), =0A= according to PowerTOP, only reaches package C-State C7 and not C8, C9, =0A= C10, while the four CPUs itself do reach C-State C10 and CE.=0A= =0A= I was asked to look at:=0A= =0A= 1.=A0 `/sys/kernel/debug/pmc_core/package_cstate_show`=0A= 2.=A0 `/sys/kernel/debug/pmc_core/ltr`=0A= =0A= Trying to gather statistics, after the Debian Linux kernel 5.9.1 is now =0A= built with `INTEL_PMC_CORE=3Dy`, `/sys/kernel/debug/pmc_core/` is still =0A= not created despite `sudo modprobe intel_pmc_core` being successful. =0A= (It=92s not loaded automatically.)=0A= =0A= =A0=A0=A0=A0 [ 1063.644680] calling=A0 pmc_core_driver_init+0x0/0x1000 =0A= [intel_pmc_core] @ 4252=0A= =A0=A0=A0=A0 [ 1063.644721] initcall pmc_core_driver_init+0x0/0x1000 =0A= [intel_pmc_core] returned 0 after 36 usecs=0A= =0A= The ACPI device `INT33A1` is there.=0A= =0A= >=A0=A0=A0=A0 Scope (_SB)=0A= >=A0=A0=A0=A0 {=0A= >=A0=A0=A0=A0=A0=A0=A0=A0 Device (PEPD)=A0=A0=A0=A0=A0=A0=A0=A0 =0A= >=A0=A0=A0=A0=A0=A0=A0=A0 {=0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Name (_HID, "INT33A1" /* Intel Power = Engine */)=A0 // _HID: Hardware ID=0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Name (_CID, EisaId ("PNP0D80") /* Win= dows-compatible System Power Management Controller */)=A0 // _CID: Compatib= le ID=0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Name (_UID, One)=A0 // _UID: Unique I= D=0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Name (PEPP, Zero)=0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Name (DEVS, Package (0x03)=0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 {=A0=A0=A0=A0=A0=A0=A0 =0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 0x02, =0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Package (0x01)=0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 {=0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 "\\_SB.PCI0.G= FX0"=0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 },=A0=A0=A0 =0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Package (0x01)=A0=A0=A0= =A0=A0=A0=A0 =0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 {=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 "\\_SB.PCI0.S= AT0.PRT1"=0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 }=0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 })=0A= >=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Name (DEVX, Package (0x08)=0A= =0A= The table `intel_pmc_core_ids` does not contain the Broadwell-U ID =0A= though, so I guess it=92s not supported.=0A= =0A= > $ lspci -nn=0A= > 00:00.0 Host bridge [0600]: Intel Corporation Broadwell-U Host Bridge -OP= I [8086:1604] (rev 09)=0A= > 00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 5= 500 [8086:1616] (rev 09)=0A= > 00:03.0 Audio device [0403]: Intel Corporation Broadwell-U Audio Controll= er [8086:160c] (rev 09)=0A= > 00:04.0 Signal processing controller [1180]: Intel Corporation Broadwell-= U Processor Thermal Subsystem [8086:1603] (rev 09)=0A= > 00:14.0 USB controller [0c03]: Intel Corporation Wildcat Point-LP USB xHC= I Controller [8086:9cb1] (rev 03)=0A= > 00:16.0 Communication controller [0780]: Intel Corporation Wildcat Point-= LP MEI Controller #1 [8086:9cba] (rev 03)=0A= > 00:19.0 Ethernet controller [0200]: Intel Corporation Ethernet Connection= (3) I218-LM [8086:15a2] (rev 03)=0A= > 00:1b.0 Audio device [0403]: Intel Corporation Wildcat Point-LP High Defi= nition Audio Controller [8086:9ca0] (rev 03)=0A= > 00:1c.0 PCI bridge [0604]: Intel Corporation Wildcat Point-LP PCI Express= Root Port #1 [8086:9c90] (rev e3)=0A= > 00:1c.3 PCI bridge [0604]: Intel Corporation Wildcat Point-LP PCI Express= Root Port #4 [8086:9c96] (rev e3)=0A= > 00:1d.0 USB controller [0c03]: Intel Corporation Wildcat Point-LP USB EHC= I Controller [8086:9ca6] (rev 03)=0A= > 00:1f.0 ISA bridge [0601]: Intel Corporation Wildcat Point-LP LPC Control= ler [8086:9cc3] (rev 03)=0A= > 00:1f.2 SATA controller [0106]: Intel Corporation Wildcat Point-LP SATA C= ontroller [AHCI Mode] [8086:9c83] (rev 03)=0A= > 00:1f.3 SMBus [0c05]: Intel Corporation Wildcat Point-LP SMBus Controller= [8086:9ca2] (rev 03)=0A= > 01:00.0 SD Host controller [0805]: O2 Micro, Inc. SD/MMC Card Reader Cont= roller [1217:8520] (rev 01)=0A= > 02:00.0 Network controller [0280]: Intel Corporation Wireless 7265 [8086:= 095a] (rev 59)=0A= =0A= Any idea, why the probe function `pmc_core_probe()` succeeds, despite =0A= the code below?=0A= =0A= =A0=A0=A0=A0=A0=A0=A0=A0 cpu_id =3D x86_match_cpu(intel_pmc_core_ids);=0A= =A0=A0=A0=A0=A0=A0=A0=A0 if (!cpu_id)=0A= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 return -ENODEV;=0A= =0A= The watchdog driver iTCO_wdt seems to load the module `pmc_core_bxt` =0A= despite I am unable to find the ACPI device `INT34D2` in the dissembled =0A= AML/ASL files.=0A= =0A= =0A= Kind regards,=0A= =0A= Paul=