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PM: EM: Fix incorrect description of the cost field in struct em_perf_state 

Due to commit 1b600da510 ("PM: EM: Optimize em_cpu_energy() and remove
division"), the logic for energy consumption calculation has been modified.
The actual calculation of cost is 10 * power * max_frequency / frequency
instead of power * max_frequency / frequency.

Therefore, the comment for cost has been updated to reflect the correct
content.

Fixes: 1b600da510 ("PM: EM: Optimize em_cpu_energy() and remove division")
Signed-off-by: Yaxiong Tian <tianyaxiong@kylinos.cn>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
[ rjw: Added Fixes: tag ]
Link: https://patch.msgid.link/20251230061534.816894-1-tianyaxiong@kylinos.cn
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
pull/1258/merge
Yaxiong Tian 2025-12-30 14:15:34 +08:00 committed by Rafael J. Wysocki
parent 9ace4753a5
commit 54b603f2db
1 changed files with 1 additions and 1 deletions
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2
include/linux/energy_model.h
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@ -18,7 +18,7 @@
* @power: The power consumed at this level (by 1 CPU or by a registered
* device). It can be a total power: static and dynamic.
* @cost: The cost coefficient associated with this level, used during
* energy calculation. Equal to: power * max_frequency / frequency
* energy calculation. Equal to: 10 * power * max_frequency / frequency
* @flags: see "em_perf_state flags" description below.
*/
struct em_perf_state {