Re: [RFC PATCH 0/7] sched: cpufreq: Remove magic margins

Lukasz Luba
2023-09-07T18:42:01Z

On 9/7/23 14:38, Peter Zijlstra wrote:
> On Thu, Sep 07, 2023 at 02:33:49PM +0100, Lukasz Luba wrote:
>>
>>
>> On 9/7/23 14:29, Peter Zijlstra wrote:
>>> On Thu, Sep 07, 2023 at 02:06:15PM +0100, Lukasz Luba wrote:
>>>
>>>>> Many extentions to the periodic task model are possible, including
>>>>> things like average runtime with bursts etc.. all have their trade-offs.
>>>>
>>>> Was that maybe proposed somewhere on LKML (the other models)?
>>>
>>> RT literatur mostly methinks. Replacing WCET with a statistical model of
>>> sorts is not uncommon, the argument goes that not everybody will have
>>> their worst case at the same time and lows and highs can commonly cancel
>>> out and this way we can cram a little more on the system.
>>>
>>> Typically this is proposed in the context of soft-realtime systems.
>>
>> Thanks Peter, I will dive into some books...
>
> I would look at academic papers, not sure any of that ever made it to
> books, Daniel would know I suppose.

Good hint, thanks!