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Shenoy" , Perry Yuan , Jonathan Corbet , "Rafael J. Wysocki" , Viresh Kumar , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Srinivas Pandruvada , Len Brown , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Ian Rogers , Adrian Hunter , James Clark Cc: christian.loehle@arm.com, kernel-team@android.com, linux-pm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-perf-users@vger.kernel.org References: <20251201201340.3746701-1-wusamuel@google.com> Content-Language: en-US From: Mario Limonciello In-Reply-To: <20251201201340.3746701-1-wusamuel@google.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SN6PR08CA0031.namprd08.prod.outlook.com (2603:10b6:805:66::44) To MN0PR12MB6101.namprd12.prod.outlook.com (2603:10b6:208:3cb::10) Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MN0PR12MB6101:EE_|LV8PR12MB9617:EE_ X-MS-Office365-Filtering-Correlation-Id: 65f9df35-bf42-4680-f2dd-08de314e50ab X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|7416014|366016|7053199007|921020; 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One of them is the ``cpu_frequency`` trace event generally used > -by ``CPUFreq``, and the other one is the ``amd_pstate_perf`` trace event > +diagnostics. One of them is the ``policy_frequency`` trace event generally > +used by ``CPUFreq``, and the other one is the ``amd_pstate_perf`` trace event > specific to ``amd-pstate``. The following sequence of shell commands can > be used to enable them and see their output (if the kernel is > configured to support event tracing). :: > @@ -531,9 +531,9 @@ configured to support event tracing). :: > -0 [003] d.s.. 4995.980971: amd_pstate_perf: amd_min_perf=85 amd_des_perf=85 amd_max_perf=166 cpu_id=3 changed=false fast_switch=true > -0 [011] d.s.. 4995.980996: amd_pstate_perf: amd_min_perf=85 amd_des_perf=85 amd_max_perf=166 cpu_id=11 changed=false fast_switch=true > > -The ``cpu_frequency`` trace event will be triggered either by the ``schedutil`` scaling > -governor (for the policies it is attached to), or by the ``CPUFreq`` core (for the > -policies with other scaling governors). > +The ``policy_frequency`` trace event will be triggered either by the > +``schedutil`` scaling governor (for the policies it is attached to), or by the > +``CPUFreq`` core (for the policies with other scaling governors). > > > Tracer Tool > diff --git a/Documentation/admin-guide/pm/intel_pstate.rst b/Documentation/admin-guide/pm/intel_pstate.rst > index fde967b0c2e0..274c9208f342 100644 > --- a/Documentation/admin-guide/pm/intel_pstate.rst > +++ b/Documentation/admin-guide/pm/intel_pstate.rst > @@ -822,23 +822,23 @@ Trace Events > ------------ > > There are two static trace events that can be used for ``intel_pstate`` > -diagnostics. One of them is the ``cpu_frequency`` trace event generally used > -by ``CPUFreq``, and the other one is the ``pstate_sample`` trace event specific > -to ``intel_pstate``. Both of them are triggered by ``intel_pstate`` only if > -it works in the :ref:`active mode `. > +diagnostics. One of them is the ``policy_frequency`` trace event generally > +used by ``CPUFreq``, and the other one is the ``pstate_sample`` trace event > +specific to ``intel_pstate``. Both of them are triggered by ``intel_pstate`` > +only if it works in the :ref:`active mode `. > > The following sequence of shell commands can be used to enable them and see > their output (if the kernel is generally configured to support event tracing):: > > # cd /sys/kernel/tracing/ > # echo 1 > events/power/pstate_sample/enable > - # echo 1 > events/power/cpu_frequency/enable > + # echo 1 > events/power/policy_frequency/enable > # cat trace > gnome-terminal--4510 [001] ..s. 1177.680733: pstate_sample: core_busy=107 scaled=94 from=26 to=26 mperf=1143818 aperf=1230607 tsc=29838618 freq=2474476 > - cat-5235 [002] ..s. 1177.681723: cpu_frequency: state=2900000 cpu_id=2 > + cat-5235 [002] ..s. 1177.681723: policy_frequency: state=2900000 cpu_id=2 policy_cpus=04 > > If ``intel_pstate`` works in the :ref:`passive mode `, the > -``cpu_frequency`` trace event will be triggered either by the ``schedutil`` > +``policy_frequency`` trace event will be triggered either by the ``schedutil`` > scaling governor (for the policies it is attached to), or by the ``CPUFreq`` > core (for the policies with other scaling governors). > > diff --git a/Documentation/trace/events-power.rst b/Documentation/trace/events-power.rst > index f45bf11fa88d..f013c74b932f 100644 > --- a/Documentation/trace/events-power.rst > +++ b/Documentation/trace/events-power.rst > @@ -26,8 +26,8 @@ cpufreq. > :: > > cpu_idle "state=%lu cpu_id=%lu" > - cpu_frequency "state=%lu cpu_id=%lu" > cpu_frequency_limits "min=%lu max=%lu cpu_id=%lu" > + policy_frequency "state=%lu cpu_id=%lu policy_cpus=%*pb" > > A suspend event is used to indicate the system going in and out of the > suspend mode: