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| author | Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> | 2025-06-13 14:49:22 -0700 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2025-06-16 14:03:09 +0200 |
| commit | 7954001a769a174f70d770c360fbff0d99dc51d4 (patch) | |
| tree | 837177354f9957815f89d3c96a2500aa2604261c /Documentation/driver-api | |
| parent | e04c78d86a9699d136910cfc0bdcf01087e3267e (diff) | |
| download | linux-7954001a769a174f70d770c360fbff0d99dc51d4.tar.gz | |
thermal: intel: int340x: Add throttling control interface to PTC
Firmware-based thermal temperature control loops may aggressively
throttle performance to prevent temperature overshoots relative to the
defined target temperature. This can negatively impact performance. User
space may prefer to prioritize performance, even if it results in
temperature overshoots with in acceptable range.
For example, user space might tolerate temperature overshoots when the
device is placed on a desk, as opposed to when it's on a lap. To
accommodate such scenarios, an optional attribute is provided to specify
a tolerance level for temperature overshoots while maintaining acceptable
performance.
Attribute:
thermal_tolerance: This attribute ranges from 0 to 7, where 0 represents
the most aggressive control to avoid any temperature overshoots, and 7
represents a more graceful approach, favoring performance even at the
expense of temperature overshoots.
Note: This level may not scale linearly. For example, a value of 3 does not
necessarily imply a 50% improvement in performance compared to a value of 0.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reviewed-by: Zhang Rui <rui.zhang@intel.com>
Link: https://patch.msgid.link/20250613214923.2910397-1-srinivas.pandruvada@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation/driver-api')
| -rw-r--r-- | Documentation/driver-api/thermal/intel_dptf.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/driver-api/thermal/intel_dptf.rst b/Documentation/driver-api/thermal/intel_dptf.rst index ec5769accae0fd..c51ac793dc06e2 100644 --- a/Documentation/driver-api/thermal/intel_dptf.rst +++ b/Documentation/driver-api/thermal/intel_dptf.rst @@ -206,6 +206,15 @@ All these controls needs admin privilege to update. Update a new temperature target in milli degree celsius for hardware to use for the temperature control. +``thermal_tolerance`` (RW) + This attribute ranges from 0 to 7, where 0 represents + the most aggressive control to avoid any temperature overshoots, and + 7 represents a more graceful approach, favoring performance even at + the expense of temperature overshoots. + Note: This level may not scale linearly. For example, a value of 3 does + not necessarily imply a 50% improvement in performance compared to a + value of 0. + Given that this is platform temperature control, it is expected that a single user-level manager owns and manages the controls. If multiple user-level software applications attempt to write different targets, it |