From: Wyes Karny <wyes.karny@amd.com>
To: Perry Yuan <perry.yuan@amd.com>
Cc: Deepak.Sharma@amd.com, Nathan.Fontenot@amd.com,
Alexander.Deucher@amd.com, Shimmer.Huang@amd.com,
Xiaojian.Du@amd.com, Li.Meng@amd.com, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org, rafael.j.wysocki@intel.com,
Mario.Limonciello@amd.com, ray.huang@amd.com,
viresh.kumar@linaro.org
Subject: Re: [PATCH v11 09/11] Documentation: introduce amd pstate active mode kernel command line options
Date: Thu, 19 Jan 2023 11:02:43 +0530 [thread overview]
Message-ID: <dce77829-4ee7-6460-da36-116d165286b1@amd.com> (raw)
In-Reply-To: <20230118075210.447418-10-perry.yuan@amd.com>
On 1/18/2023 1:22 PM, Perry Yuan wrote:
> AMD Pstate driver support another firmware based autonomous mode
> with "amd_pstate=active" added to the kernel command line.
> In autonomous mode SMU firmware decides frequencies at runtime
> based on workload utilization, usage in other IPs, infrastructure
> limits such as power, thermals and so on.
>
> Acked-by: Huang Rui <ray.huang@amd.com>
> Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
> Tested-by: Wyes Karny <wyes.karny@amd.com>
> Signed-off-by: Perry Yuan <perry.yuan@amd.com>
Reviewed-by: Wyes Karny <wyes.karny@amd.com>
> ---
> Documentation/admin-guide/kernel-parameters.txt | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 6cfa6e3996cf..e3618dfdb36a 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -7020,3 +7020,10 @@
> management firmware translates the requests into actual
> hardware states (core frequency, data fabric and memory
> clocks etc.)
> + active
> + Use amd_pstate_epp driver instance as the scaling driver,
> + driver provides a hint to the hardware if software wants
> + to bias toward performance (0x0) or energy efficiency (0xff)
> + to the CPPC firmware. then CPPC power algorithm will
> + calculate the runtime workload and adjust the realtime cores
> + frequency.
--
Thanks & Regards,
Wyes
next prev parent reply other threads:[~2023-01-19 5:33 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-18 7:51 [PATCH v11 00/11] Implement AMD Pstate EPP Driver Perry Yuan
2023-01-18 7:52 ` [PATCH v11 01/11] ACPI: CPPC: Add AMD pstate energy performance preference cppc control Perry Yuan
2023-01-18 7:52 ` [PATCH v11 02/11] Documentation: amd-pstate: add EPP profiles introduction Perry Yuan
2023-01-19 5:17 ` Wyes Karny
2023-01-18 7:52 ` [PATCH v11 03/11] cpufreq: amd-pstate: optimize driver working mode selection in amd_pstate_param() Perry Yuan
2023-01-18 7:52 ` [PATCH v11 04/11] cpufreq: amd-pstate: implement Pstate EPP support for the AMD processors Perry Yuan
2023-01-18 15:47 ` kernel test robot
2023-01-19 2:45 ` Huang Rui
2023-01-19 5:17 ` Wyes Karny
2023-01-18 7:52 ` [PATCH v11 05/11] cpufreq: amd-pstate: implement amd pstate cpu online and offline callback Perry Yuan
2023-01-19 5:27 ` Wyes Karny
2023-01-18 7:52 ` [PATCH v11 06/11] cpufreq: amd-pstate: implement suspend and resume callbacks Perry Yuan
2023-01-19 5:31 ` Wyes Karny
2023-01-18 7:52 ` [PATCH v11 07/11] cpufreq: amd-pstate: add driver working mode switch support Perry Yuan
2023-01-18 7:52 ` [PATCH v11 08/11] Documentation: amd-pstate: add amd pstate driver mode introduction Perry Yuan
2023-01-19 5:32 ` Wyes Karny
2023-01-18 7:52 ` [PATCH v11 09/11] Documentation: introduce amd pstate active mode kernel command line options Perry Yuan
2023-01-19 5:32 ` Wyes Karny [this message]
2023-01-18 7:52 ` [PATCH v11 10/11] cpufreq: amd-pstate: convert sprintf with sysfs_emit() Perry Yuan
2023-01-19 5:33 ` Wyes Karny
2023-01-18 7:52 ` [PATCH v11 11/11] Documentation: amd-pstate: introduce new global sysfs attributes Perry Yuan
2023-01-19 5:33 ` Wyes Karny
2023-01-19 2:50 ` [PATCH v11 00/11] Implement AMD Pstate EPP Driver Huang Rui
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