Re: [PATCH v12 00/11] Parallel CPU bringup for x86_64

[Guilherme G. Piccoli]

On 28/02/2023 07:13, Paul Menzel wrote:
> Dear Guilherme,
> 
> 
> Am 27.02.23 um 22:39 schrieb Guilherme G. Piccoli:
> 
>> I've tested it on Steam Deck (with and without the "no_parallel_bringup"
>> parameter), it works fine - also tested S3/deep sleep-resume cycle.
>>
>> Feel free to add (to the series):
>> Tested-by: Guilherme G. Piccoli <gpiccoli@xxxxxxxxxx>
> 
> Thank you for testing the series. It’d be great if you could share the 
> timing differences.
> 
> […]
> 
> 
> Kind regards,
> 
> Paul

Hi Paul!

The results...weren't so great, I felt no difference heh
Which is also not bad, it seems the series favors big SMP systems, Deck
has only 8 CPUs.

But maybe the way I measured is not ideal? I just compared timestamps on
dmesg from the first SMP message up to the one that says the boot of
secondary CPUs is complete. Do you have a better suggestion? I can try
things here.

Cheers,


Guilherme