From: Christian Loehle <christian.loehle@arm.com>
To: "Mario Limonciello" <superm1@kernel.org>,
"Hans de Goede" <hdegoede@redhat.com>,
"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>
Cc: Mario Limonciello <mario.limonciello@amd.com>,
Perry Yuan <perry.yuan@amd.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<x86@kernel.org>, "H . Peter Anvin" <hpa@zytor.com>,
Jonathan Corbet <corbet@lwn.net>, Huang Rui <ray.huang@amd.com>,
"Gautham R . Shenoy" <gautham.shenoy@amd.com>,
"Rafael J . Wysocki" <rafael@kernel.org>,
Viresh Kumar <viresh.kumar@linaro.org>,
"open list:AMD HETERO CORE HARDWARE FEEDBACK DRIVER"
<platform-driver-x86@vger.kernel.org>,
"open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<linux-kernel@vger.kernel.org>,
"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
"open list:AMD PSTATE DRIVER" <linux-pm@vger.kernel.org>
Subject: Re: [PATCH v8 00/13] Add support for AMD hardware feedback interface
Date: Thu, 20 Mar 2025 22:42:47 +0000 [thread overview]
Message-ID: <6332a08a-8c80-41e8-b36a-96f358f4ea2c@arm.com> (raw)
In-Reply-To: <20250218190822.1039982-1-superm1@kernel.org>
On 2/18/25 19:08, Mario Limonciello wrote:
> From: Mario Limonciello <mario.limonciello@amd.com>
>
> The AMD Heterogeneous core design and Hardware Feedback Interface (HFI)
> provide behavioral classification and a dynamically updated ranking table
> for the scheduler to use when choosing cores for tasks.
>
> Threads are classified during runtime into enumerated classes.
> Currently, the driver supports 3 classes (0 through 2). These classes
> represent thread performance/power characteristics that may benefit from
> special scheduling behaviors. The real-time thread classification is
> consumed by the operating system and is used to inform the scheduler of
> where the thread should be placed for optimal performance or energy efficiency.
>
> The thread classification helps to select CPU from a ranking table that describes
> an efficiency and performance ranking for each classification from two dimensions.
Where is that happening in the series? (Using the per-thread classification
for task placement.)
Am I missing something?
prev parent reply other threads:[~2025-03-20 22:42 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-18 19:08 Mario Limonciello
2025-02-18 19:08 ` [PATCH v8 01/13] Documentation: x86: Add AMD Hardware Feedback Interface documentation Mario Limonciello
2025-03-19 14:01 ` Ilpo Järvinen
2025-03-20 16:41 ` Mario Limonciello
2025-03-21 13:58 ` Ilpo Järvinen
2025-03-21 14:41 ` Mario Limonciello
2025-02-18 19:08 ` [PATCH v8 02/13] MAINTAINERS: Add maintainer entry for AMD Hardware Feedback Driver Mario Limonciello
2025-02-18 19:08 ` [PATCH v8 03/13] x86/msr-index: define AMD heterogeneous CPU related MSR Mario Limonciello
2025-02-18 19:08 ` [PATCH v8 04/13] platform/x86: hfi: Introduce AMD Hardware Feedback Interface Driver Mario Limonciello
2025-03-19 14:03 ` Ilpo Järvinen
2025-03-20 16:46 ` Mario Limonciello
2025-03-21 14:01 ` Ilpo Järvinen
2025-02-18 19:08 ` [PATCH v8 05/13] platform/x86: hfi: parse CPU core ranking data from shared memory Mario Limonciello
2025-03-19 14:04 ` Ilpo Järvinen
2025-02-18 19:08 ` [PATCH v8 06/13] platform/x86: hfi: init per-cpu scores for each class Mario Limonciello
2025-02-18 19:08 ` [PATCH v8 07/13] platform/x86: hfi: add online and offline callback support Mario Limonciello
2025-03-19 14:04 ` Ilpo Järvinen
2025-02-18 19:08 ` [PATCH v8 08/13] platform/x86: hfi: add power management callback Mario Limonciello
2025-02-18 19:08 ` [PATCH v8 09/13] x86/process: Clear hardware feedback history for AMD processors Mario Limonciello
2025-02-18 19:08 ` [PATCH v8 10/13] cpufreq/amd-pstate: Disable preferred cores on designs with workload classification Mario Limonciello
2025-02-18 19:08 ` [PATCH v8 11/13] platform/x86/amd: hfi: Set ITMT priority from ranking data Mario Limonciello
2025-02-18 19:08 ` [PATCH v8 12/13] platform/x86/amd: hfi: Add debugfs support Mario Limonciello
2025-03-19 14:05 ` Ilpo Järvinen
2025-02-18 19:08 ` [PATCH v8 13/13] x86/itmt: Add debugfs file to show core priorities Mario Limonciello
2025-03-20 22:42 ` Christian Loehle [this message]
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