Re: [PATCH 0/1] drm/xe: Set GT rp min frequency as 1.2GHz default for BMG/CRI

["Hellstrom, Thomas" <thomas.hellstrom@intel.com>]

On Mon, 2026-02-16 at 19:21 +0530, Nareshkumar Gollakoti wrote:
> Performance degradation occurs in multi-BMG GPU configurations 
> during Peer-to-Peer transactions when one of the two GPUs remains
> idle
> with no engine activity.
> The root cause has been identified as frequency downscaling:
> the idle remote GPU reduces its operating frequency to the minimum
> 400MHz,
> which negatively impacts the bandwidth available for P2P transactions
> initiated by the active local GPU.
> 
> To address above problem this patch ensures for the platform BMG/CRI
> the default GT rp frquency min set as 1.2GHz to ensure effetive P2P
> transaction bandwidth.
> 
> Note: 
> While frequency boosting improves performance, 
> it also increases power consumption. In single GPU mode,
> it causes the GPU to operate at unnecessarily high frequencies by
> default
> and as of now we do not have any mechanism to limit this for single
> GPU.
> 
> Nareshkumar Gollakoti (1):
>   drm/xe: Set GT rp min frequency as 1.2GHz default for BMG/CRI
> 
>  drivers/gpu/drm/xe/xe_guc_pc.c | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)

Wasn't the idea to do this only for the Arc PRO BMGs? Perhaps the
compute team would want to chime in here for the scope of this
workaround.

Thanks,
Thomas