Re: [PATCH v2 3/3] MIPS: CPS: Optimise delay CPU calibration for SMP

[Jiaxun Yang]

在2025年7月4日周五 下午4:13，Gregory CLEMENT写道：
> On MIPS architecture with CPS-based SMP support, all CPU cores in the
> same cluster run at the same frequency since they share the same L2
> cache, requiring a fixed CPU/L2 cache ratio.
>
> This allows to implement calibrate_delay_is_known(), which will return
> 0 (triggering calibration) only for the primary CPU of each
> cluster. For other CPUs, we can simply reuse the value from their
> cluster's primary CPU core.
>
> With the introduction of this patch, a configuration running 32 cores
> spread across two clusters sees a significant reduction in boot time
> by approximately 600 milliseconds.
>
> Signed-off-by: Gregory CLEMENT <gregory.clement@xxxxxxxxxxx>

Reviewed-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>

Thanks!

-- 
- Jiaxun