linux-kernel - Re: [PATCH v3 0/9] Add callback for cooling list update to speed-up IPA

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Date: Tue, 2 Jan 2024 09:39:30 +0000
From: Lukasz Luba <lukasz.luba@....com>
To: "Rafael J. Wysocki" <rafael@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
 daniel.lezcano@...aro.org, rui.zhang@...el.com
Subject: Re: [PATCH v3 0/9] Add callback for cooling list update to speed-up
 IPA



On 12/29/23 17:15, Rafael J. Wysocki wrote:
> On Thu, Dec 21, 2023 at 12:16 AM Lukasz Luba <lukasz.luba@....com> wrote:
>>
>> Hi all,
>>
>> The patch set adds a new callback for thermal governors and implementation for
>> Intelligent Power Allocator.
>>
>> The goal is to move some heavy operations like the memory allocations and heavy
>> computations (multiplications) out of throttle() callback hot path.
>>
>> The new callback is generic enough to handle other important update events.
>> It re-uses existing thermal_notify_event definitions.
>>
>> In addition there are some small clean-ups for IPA code.
>>
>> The patch set is based on current pm/bleeding-edge branch (20 Dec).
>>
>> changes:
>> v3:
>> - changed helper name to thermal_governor_update_tz() with also
>>    "reason" argument (Rafael)
>> - added thermal_governor_update_tz() to thermal_core.h for use from sysfs
>>    functions
>> - changed names of the events (THERMAL_TZ_BIND_CDEV) (Rafael)
>> - patch 2/9 changed header and comment for function (Rafael)
>> - patch 3/9: used unsigned types for num_actors, buffer_size (Rafael)
>> - changed trace functions and added new patch 4/9 to be prepare tracing for
>>    different internal IPA array; it also drops dynamic array inside trace event
>> - used new structure power_actor and changed the code in patch 5/9 (Rafael)
>> - keept the local num_actors variable (Rafael)
>> - patch 6/9 skipped redundant parens and changed the header desc. (Rafael)
>> - patch 7/9 changed header and used instance->tz->lock (Rafael)
>> - patch 8/9 removed handle_weight_update() and renamed new event to
>>    THERMAL_INSTANCE_WEIGHT_CHANGE (Rafael)
>> - patch 9/9 aliged to use THERMAL_INSTANCE_WEIGHT_CHANGE is switch (Rafael)
>>
>> v2 can be found here [1]
>>
>> Regards,
>> Lukasz
>>
>> [1] https://lore.kernel.org/lkml/20231212134844.1213381-1-lukasz.luba@arm.com/
>>
>> Lukasz Luba (9):
>>    thermal: core: Add governor callback for thermal zone change
>>    thermal: gov_power_allocator: Refactor check_power_actors()
>>    thermal: gov_power_allocator: Refactor checks in divvy_up_power()
>>    thermal: gov_power_allocator: Change trace functions
>>    thermal: gov_power_allocator: Move memory allocation out of throttle()
>>    thermal: gov_power_allocator: Simplify checks for valid power actor
>>    thermal/sysfs: Update instance->weight under tz lock
>>    thermal/sysfs: Update governors when the 'weight' has changed
>>    thermal: gov_power_allocator: Support new update callback of weights
>>
>>   drivers/thermal/gov_power_allocator.c | 269 ++++++++++++++++----------
>>   drivers/thermal/thermal_core.c        |  14 ++
>>   drivers/thermal/thermal_core.h        |   2 +
>>   drivers/thermal/thermal_sysfs.c       |   7 +
>>   drivers/thermal/thermal_trace_ipa.h   |  50 +++--
>>   include/linux/thermal.h               |   7 +
>>   6 files changed, 226 insertions(+), 123 deletions(-)
>>
>> --
> 
> All patches in the series applied as 6.8 material, with minor white
> space adjustment in patch [8/9].
> 
> Thanks!
> 

Thank you Rafael!