linux-kernel - Re: [PATCH] thermal: power_allocator: using round the division when re-divvying up power

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Date:   Tue, 16 Mar 2021 14:15:15 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Lukasz Luba <lukasz.luba@....com>, gao.yunxiao6@...il.com
Cc:     rui.zhang@...el.com, amitk@...nel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, orsonzhai@...il.com,
        zhang.lyra@...il.com, "jeson.gao" <jeson.gao@...soc.com>
Subject: Re: [PATCH] thermal: power_allocator: using round the division when
 re-divvying up power

On 15/03/2021 10:51, Lukasz Luba wrote:
> 
> 
> On 3/15/21 8:25 AM, gao.yunxiao6@...il.com wrote:
>> From: "jeson.gao" <jeson.gao@...soc.com>
>>
>> The division is used directly in re-divvying up power, the decimal
>> part will
>> be discarded, devices will get less than the extra_actor_power - 1.
>> if using round the division to make the calculation more accurate.
>>
>> For example:
>> actor0 received more than it's max_power, it has the extra_power 759
>> actor1 received less than it's max_power, it require extra_actor_power
>> 395
>> actor2 received less than it's max_power, it require extra_actor_power
>> 365
>> actor1 and actor2 require the total capped_extra_power 760
>>
>> using division in re-divvying up power
>> actor1 would actually get the extra_actor_power 394
>> actor2 would actually get the extra_actor_power 364
>>
>> if using round the division in re-divvying up power
>> actor1 would actually get the extra_actor_power 394
>> actor2 would actually get the extra_actor_power 365
>>
>> Signed-off-by: Jeson Gao <jeson.gao@...soc.com>
>> ---

Applied, thanks

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